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slint/internal/backends/qt/qt_window.rs
Simon Hausmann 84ddfc6c2f Add support for rendering the mouse cursor with linuxkms 
The cursor is loaded by the window adapter from the cache. When it's
loaded the first time, its format will be Svg, so we convert it to a
pixel buffer. That way the skia backend can convert it on first draw
into a skia_safe::Image and replace the cache entry with the backend
storage variant.
2023-07-31 13:06:28 +02:00

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// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-1.1 OR LicenseRef-Slint-commercial
// cSpell: ignore antialiasing frameless qbrush qpointf qreal qwidgetsize svgz
use cpp::*;
use euclid::approxeq::ApproxEq;
use i_slint_core::component::{ComponentRc, ComponentRef};
use i_slint_core::graphics::euclid::num::Zero;
use i_slint_core::graphics::rendering_metrics_collector::{
RenderingMetrics, RenderingMetricsCollector,
};
use i_slint_core::graphics::{euclid, Brush, Color, FontRequest, Image, Point, SharedImageBuffer};
use i_slint_core::input::{KeyEventType, KeyInputEvent, MouseEvent};
use i_slint_core::item_rendering::{ItemCache, ItemRenderer};
use i_slint_core::items::{
self, FillRule, ImageRendering, Item, ItemRc, ItemRef, Layer, MouseCursor, Opacity,
PointerEventButton, RenderingResult, TextOverflow, TextWrap, WindowItem,
};
use i_slint_core::layout::Orientation;
use i_slint_core::lengths::{
LogicalLength, LogicalPoint, LogicalRect, LogicalSize, LogicalVector, PhysicalPx, ScaleFactor,
};
use i_slint_core::platform::{PlatformError, WindowEvent};
use i_slint_core::window::{WindowAdapter, WindowAdapterInternal, WindowInner};
use i_slint_core::{ImageInner, Property, SharedString};
use items::{ImageFit, TextHorizontalAlignment, TextVerticalAlignment};
use std::cell::RefCell;
use std::pin::Pin;
use std::ptr::NonNull;
use std::rc::{Rc, Weak};
use crate::key_generated;
use i_slint_core::renderer::Renderer;
use once_cell::unsync::OnceCell;
cpp! {{
#include <QtWidgets/QtWidgets>
#include <QtWidgets/QGraphicsScene>
#include <QtWidgets/QGraphicsBlurEffect>
#include <QtWidgets/QGraphicsPixmapItem>
#include <QtGui/QAccessible>
#include <QtGui/QPainter>
#include <QtGui/QPaintEngine>
#include <QtGui/QPainterPath>
#include <QtGui/QWindow>
#include <QtGui/QResizeEvent>
#include <QtGui/QTextLayout>
#include <QtGui/QImageReader>
#include <QtGui/QCursor>
#include <QtCore/QBasicTimer>
#include <QtCore/QTimer>
#include <QtCore/QPointer>
#include <QtCore/QBuffer>
#include <QtCore/QEvent>
#include <QtCore/QFileInfo>
#include <memory>
void ensure_initialized(bool from_qt_backend);
using QPainterPtr = std::unique_ptr<QPainter>;
struct TimerHandler : QObject {
QBasicTimer timer;
static TimerHandler& instance() {
static TimerHandler instance;
return instance;
}
void timerEvent(QTimerEvent *event) override {
if (event->timerId() != timer.timerId()) {
QObject::timerEvent(event);
return;
}
timer.stop();
rust!(Slint_timerEvent [] { timer_event() });
}
};
struct SlintWidget : QWidget {
void *rust_window;
bool isMouseButtonDown = false;
QPoint ime_position;
SlintWidget() {
setMouseTracking(true);
setFocusPolicy(Qt::StrongFocus);
setAttribute(Qt::WA_TranslucentBackground);
// WA_TranslucentBackground sets WA_NoSystemBackground, but we actually need WA_NoSystemBackground
// to draw the window background which is set on the palette.
// (But the window background might not be opaque)
setAttribute(Qt::WA_NoSystemBackground, false);
}
void paintEvent(QPaintEvent *) override {
auto painter = std::unique_ptr<QPainter>(new QPainter(this));
painter->setClipRect(rect());
painter->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
QPainterPtr *painter_ptr = &painter;
rust!(Slint_paintEvent [rust_window: &QtWindow as "void*", painter_ptr: &mut QPainterPtr as "QPainterPtr*"] {
rust_window.paint_event(std::mem::take(painter_ptr))
});
}
void resizeEvent(QResizeEvent *event) override {
QSize size = event->size();
rust!(Slint_resizeEvent [rust_window: &QtWindow as "void*", size: qttypes::QSize as "QSize"] {
rust_window.resize_event(size)
});
}
void mousePressEvent(QMouseEvent *event) override {
isMouseButtonDown = true;
QPoint pos = event->pos();
int button = event->button();
rust!(Slint_mousePressEvent [rust_window: &QtWindow as "void*", pos: qttypes::QPoint as "QPoint", button: u32 as "int" ] {
let position = LogicalPoint::new(pos.x as _, pos.y as _);
let button = from_qt_button(button);
rust_window.mouse_event(MouseEvent::Pressed{ position, button, click_count: 0 })
});
}
void mouseReleaseEvent(QMouseEvent *event) override {
// HACK: Qt on windows is a bit special when clicking on the window
// close button and when the resulting close event is ignored.
// In that case a release event that was not preceded by
// a press event is sent on Windows.
// This confuses Slint, so eat this event.
//
// One example is a popup is shown in the close event that
// then ignores the the close request to ask the user what to
// do. The stray release event will then close the popup
// straight away
if (!isMouseButtonDown) {
return;
}
isMouseButtonDown = false;
void *parent_of_popup_to_close = nullptr;
if (auto p = dynamic_cast<const SlintWidget*>(parent())) {
void *parent_window = p->rust_window;
bool close_popup = rust!(Slint_mouseReleaseEventPopup [parent_window: &QtWindow as "void*"] -> bool as "bool" {
parent_window.close_popup_after_click()
});
if (close_popup) {
parent_of_popup_to_close = parent_window;
}
}
QPoint pos = event->pos();
int button = event->button();
rust!(Slint_mouseReleaseEvent [rust_window: &QtWindow as "void*", pos: qttypes::QPoint as "QPoint", button: u32 as "int" ] {
let position = LogicalPoint::new(pos.x as _, pos.y as _);
let button = from_qt_button(button);
rust_window.mouse_event(MouseEvent::Released{ position, button, click_count: 0 })
});
if (parent_of_popup_to_close) {
rust!(Slint_mouseReleaseEventClosePopup [parent_of_popup_to_close: &QtWindow as "void*"] {
parent_of_popup_to_close.close_popup();
});
}
}
void mouseMoveEvent(QMouseEvent *event) override {
QPoint pos = event->pos();
rust!(Slint_mouseMoveEvent [rust_window: &QtWindow as "void*", pos: qttypes::QPoint as "QPoint"] {
let position = LogicalPoint::new(pos.x as _, pos.y as _);
rust_window.mouse_event(MouseEvent::Moved{position})
});
}
void wheelEvent(QWheelEvent *event) override {
QPointF pos = event->position();
QPoint delta = event->pixelDelta();
if (delta.isNull()) {
delta = event->angleDelta();
}
rust!(Slint_mouseWheelEvent [rust_window: &QtWindow as "void*", pos: qttypes::QPointF as "QPointF", delta: qttypes::QPoint as "QPoint"] {
let position = LogicalPoint::new(pos.x as _, pos.y as _);
rust_window.mouse_event(MouseEvent::Wheel{position, delta_x: delta.x as _, delta_y: delta.y as _})
});
}
void leaveEvent(QEvent *) override {
rust!(Slint_mouseLeaveEvent [rust_window: &QtWindow as "void*"] {
rust_window.mouse_event(MouseEvent::Exit)
});
}
void keyPressEvent(QKeyEvent *event) override {
QString text = event->text();
int key = event->key();
rust!(Slint_keyPress [rust_window: &QtWindow as "void*", key: i32 as "int", text: qttypes::QString as "QString"] {
rust_window.key_event(key, text.clone(), false);
});
}
void keyReleaseEvent(QKeyEvent *event) override {
QString text = event->text();
int key = event->key();
rust!(Slint_keyRelease [rust_window: &QtWindow as "void*", key: i32 as "int", text: qttypes::QString as "QString"] {
rust_window.key_event(key, text.clone(), true);
});
}
void changeEvent(QEvent *event) override {
if (event->type() == QEvent::ActivationChange) {
bool active = isActiveWindow();
rust!(Slint_updateWindowActivation [rust_window: &QtWindow as "void*", active: bool as "bool"] {
WindowInner::from_pub(&rust_window.window).set_active(active)
});
} else if (event->type() == QEvent::PaletteChange || event->type() == QEvent::StyleChange) {
bool dark_color_scheme = qApp->palette().color(QPalette::Window).valueF() < 0.5;
rust!(Slint_updateWindowDarkColorScheme [rust_window: &QtWindow as "void*", dark_color_scheme: bool as "bool"] {
if let Some(ds) = rust_window.dark_color_scheme.get() {
ds.as_ref().set(dark_color_scheme);
}
});
}
QWidget::changeEvent(event);
}
void closeEvent(QCloseEvent *event) override {
bool accepted = rust!(Slint_requestClose [rust_window: &QtWindow as "void*"] -> bool as "bool" {
return WindowInner::from_pub(&rust_window.window).request_close();
});
if (accepted) {
event->accept();
} else {
event->ignore();
}
}
QSize sizeHint() const override {
auto preferred_size = rust!(Slint_sizeHint [rust_window: &QtWindow as "void*"] -> qttypes::QSize as "QSize" {
let component_rc = WindowInner::from_pub(&rust_window.window).component();
let component = ComponentRc::borrow_pin(&component_rc);
let layout_info_h = component.as_ref().layout_info(Orientation::Horizontal);
let layout_info_v = component.as_ref().layout_info(Orientation::Vertical);
qttypes::QSize {
width: layout_info_h.preferred_bounded() as _,
height: layout_info_v.preferred_bounded() as _,
}
});
if (!preferred_size.isEmpty()) {
return preferred_size;
} else {
return QWidget::sizeHint();
}
}
QVariant inputMethodQuery(Qt::InputMethodQuery query) const override {
switch (query) {
case Qt::ImCursorRectangle: {
return QRect(ime_position.x(), ime_position.y(), 1, 1);
}
default: break;
}
return QWidget::inputMethodQuery(query);
}
void inputMethodEvent(QInputMethodEvent *event) override {
QString commit_string = event->commitString();
QString preedit_string = event->preeditString();
int replacement_start = event->replacementStart();
int replacement_length = qMax(0, event->replacementLength());
if (replacement_start < 0) {
// Not sure if this can happen yet, but this way we can safely cast to usize below.
replacement_start = 0;
replacement_length = 0;
}
int preedit_cursor = -1;
for (const QInputMethodEvent::Attribute &attribute: event->attributes()) {
if (attribute.type == QInputMethodEvent::Cursor) {
if (attribute.length > 0) {
preedit_cursor = attribute.start;
}
}
}
event->accept();
rust!(Slint_inputMethodEvent [rust_window: &QtWindow as "void*", commit_string: qttypes::QString as "QString",
preedit_string: qttypes::QString as "QString", replacement_start: i32 as "int", replacement_length: i32 as "int",
preedit_cursor: i32 as "int"] {
let runtime_window = WindowInner::from_pub(&rust_window.window);
let event = KeyInputEvent {
event_type: KeyEventType::UpdateComposition,
text: preedit_string.to_string().into(),
preedit_selection_start: replacement_start as usize,
preedit_selection_end: replacement_start as usize + replacement_length as usize,
};
runtime_window.process_key_input(event);
if !commit_string.is_empty() {
let event = KeyInputEvent {
event_type: KeyEventType::CommitComposition,
text: commit_string.to_string().into(),
..Default::default()
};
runtime_window.process_key_input(event);
}
});
}
};
// Helper function used for the TextInput layouting
//
// if line_for_y_pos > 0, then the function will return the line at this y position
static int do_text_layout(QTextLayout &layout, int flags, const QRectF &rect, int line_for_y_pos = -1) {
QTextOption options;
options.setWrapMode((flags & Qt::TextWordWrap) ? QTextOption::WordWrap : QTextOption::NoWrap);
if (flags & Qt::AlignHCenter)
options.setAlignment(Qt::AlignCenter);
else if (flags & Qt::AlignLeft)
options.setAlignment(Qt::AlignLeft);
else if (flags & Qt::AlignRight)
options.setAlignment(Qt::AlignRight);
options.setFlags(QTextOption::IncludeTrailingSpaces);
layout.setTextOption(options);
layout.setCacheEnabled(true);
QFontMetrics fm(layout.font());
int leading = fm.leading();
qreal height = 0;
layout.beginLayout();
int count = 0;
while(1) {
auto line = layout.createLine();
if (!line.isValid())
break;
line.setLineWidth(rect.width());
height += leading;
line.setPosition(QPointF(0, height));
height += line.height();
if (line_for_y_pos >= 0 && height > line_for_y_pos) {
return count;
}
count++;
}
layout.endLayout();
if (flags & Qt::AlignVCenter) {
layout.setPosition(QPointF(0, (rect.height() - height) / 2.));
} else if (flags & Qt::AlignBottom) {
layout.setPosition(QPointF(0, rect.height() - height));
}
return -1;
}
}}
cpp_class!(
/// Wrapper around a pointer to a QPainter.
// We can't use [`qttypes::QPainter`] because it is not sound <https://github.com/woboq/qmetaobject-rs/issues/267>
pub unsafe struct QPainterPtr as "QPainterPtr"
);
impl QPainterPtr {
pub fn restore(&mut self) {
cpp!(unsafe [self as "QPainterPtr*"] {
(*self)->restore();
});
}
pub fn save(&mut self) {
cpp!(unsafe [self as "QPainterPtr*"] {
(*self)->save();
});
}
}
cpp_class! {pub unsafe struct QPainterPath as "QPainterPath"}
impl QPainterPath {
/*
pub fn reserve(&mut self, size: usize) {
cpp! { unsafe [self as "QPainterPath*", size as "long long"] {
self->reserve(size);
}}
}*/
pub fn move_to(&mut self, to: qttypes::QPointF) {
cpp! { unsafe [self as "QPainterPath*", to as "QPointF"] {
self->moveTo(to);
}}
}
pub fn line_to(&mut self, to: qttypes::QPointF) {
cpp! { unsafe [self as "QPainterPath*", to as "QPointF"] {
self->lineTo(to);
}}
}
pub fn quad_to(&mut self, ctrl: qttypes::QPointF, to: qttypes::QPointF) {
cpp! { unsafe [self as "QPainterPath*", ctrl as "QPointF", to as "QPointF"] {
self->quadTo(ctrl, to);
}}
}
pub fn cubic_to(
&mut self,
ctrl1: qttypes::QPointF,
ctrl2: qttypes::QPointF,
to: qttypes::QPointF,
) {
cpp! { unsafe [self as "QPainterPath*", ctrl1 as "QPointF", ctrl2 as "QPointF", to as "QPointF"] {
self->cubicTo(ctrl1, ctrl2, to);
}}
}
pub fn close(&mut self) {
cpp! { unsafe [self as "QPainterPath*"] {
self->closeSubpath();
}}
}
pub fn set_fill_rule(&mut self, rule: key_generated::Qt_FillRule) {
cpp! { unsafe [self as "QPainterPath*", rule as "Qt::FillRule" ] {
self->setFillRule(rule);
}}
}
}
fn into_qbrush(
brush: i_slint_core::Brush,
width: qttypes::qreal,
height: qttypes::qreal,
) -> qttypes::QBrush {
/// Mangle the position to work around the fact that Qt merge stop at equal position
fn mangle_position(position: f32, idx: usize, count: usize) -> f32 {
// Add or subtract a small amount to make sure each stop is different but still in [0..1].
// It is possible that we swap stops that are both really really close to 0.54321+ε,
// but that is really unlikely
if position < 0.54321 + 67.8 * f32::EPSILON {
position + f32::EPSILON * idx as f32
} else {
position - f32::EPSILON * (count - idx - 1) as f32
}
}
match brush {
i_slint_core::Brush::SolidColor(color) => {
let color: u32 = color.as_argb_encoded();
cpp!(unsafe [color as "QRgb"] -> qttypes::QBrush as "QBrush" {
return QBrush(QColor::fromRgba(color));
})
}
i_slint_core::Brush::LinearGradient(g) => {
let (start, end) = i_slint_core::graphics::line_for_angle(g.angle());
let p1 = qttypes::QPointF { x: start.x as _, y: start.y as _ };
let p2 = qttypes::QPointF { x: end.x as _, y: end.y as _ };
cpp_class!(unsafe struct QLinearGradient as "QLinearGradient");
let mut qlg = cpp! {
unsafe [p1 as "QPointF", p2 as "QPointF"] -> QLinearGradient as "QLinearGradient" {
QLinearGradient qlg(p1, p2);
qlg.setCoordinateMode(QGradient::ObjectMode);
return qlg;
}
};
let count = g.stops().count();
for (idx, s) in g.stops().enumerate() {
let pos: f32 = mangle_position(s.position, idx, count);
let color: u32 = s.color.as_argb_encoded();
cpp! {unsafe [mut qlg as "QLinearGradient", pos as "float", color as "QRgb"] {
qlg.setColorAt(pos, QColor::fromRgba(color));
}};
}
cpp! {unsafe [qlg as "QLinearGradient"] -> qttypes::QBrush as "QBrush" {
return QBrush(qlg);
}}
}
i_slint_core::Brush::RadialGradient(g) => {
cpp_class!(unsafe struct QRadialGradient as "QRadialGradient");
let mut qrg = cpp! {
unsafe [width as "qreal", height as "qreal"] -> QRadialGradient as "QRadialGradient" {
QRadialGradient qrg(width / 2, height / 2, (width + height) / 4);
return qrg;
}
};
let count = g.stops().count();
for (idx, s) in g.stops().enumerate() {
let pos: f32 = mangle_position(s.position, idx, count);
let color: u32 = s.color.as_argb_encoded();
cpp! {unsafe [mut qrg as "QRadialGradient", pos as "float", color as "QRgb"] {
qrg.setColorAt(pos, QColor::fromRgba(color));
}};
}
cpp! {unsafe [qrg as "QRadialGradient"] -> qttypes::QBrush as "QBrush" {
return QBrush(qrg);
}}
}
_ => qttypes::QBrush::default(),
}
}
fn from_qt_button(qt_button: u32) -> PointerEventButton {
match qt_button {
1 => PointerEventButton::Left,
2 => PointerEventButton::Right,
4 => PointerEventButton::Middle,
_ => PointerEventButton::Other,
}
}
/// Given a position offset and an object of a given type that has x,y,width,height properties,
/// create a QRectF that fits it.
macro_rules! check_geometry {
($size:expr) => {{
let size = $size;
if size.width < 1. || size.height < 1. {
return Default::default();
};
qttypes::QRectF { x: 0., y: 0., width: size.width as _, height: size.height as _ }
}};
}
fn adjust_rect_and_border_for_inner_drawing(rect: &mut qttypes::QRectF, border_width: &mut f32) {
// If the border width exceeds the width, just fill the rectangle.
*border_width = border_width.min((rect.width as f32) / 2.);
// adjust the size so that the border is drawn within the geometry
rect.x += *border_width as f64 / 2.;
rect.y += *border_width as f64 / 2.;
rect.width -= *border_width as f64;
rect.height -= *border_width as f64;
}
struct QtItemRenderer<'a> {
painter: QPainterPtr,
cache: &'a ItemCache<qttypes::QPixmap>,
window: &'a i_slint_core::api::Window,
metrics: RenderingMetrics,
}
impl ItemRenderer for QtItemRenderer<'_> {
fn draw_rectangle(&mut self, rect_: Pin<&items::Rectangle>, _: &ItemRc, size: LogicalSize) {
let rect: qttypes::QRectF = check_geometry!(size);
let brush: qttypes::QBrush = into_qbrush(rect_.background(), rect.width, rect.height);
let painter: &mut QPainterPtr = &mut self.painter;
cpp! { unsafe [painter as "QPainterPtr*", brush as "QBrush", rect as "QRectF"] {
(*painter)->fillRect(rect, brush);
}}
}
fn draw_border_rectangle(
&mut self,
rect: std::pin::Pin<&items::BorderRectangle>,
_: &ItemRc,
size: LogicalSize,
) {
Self::draw_rectangle_impl(
&mut self.painter,
check_geometry!(size),
rect.background(),
rect.border_color(),
rect.border_width().get(),
rect.border_radius().get(),
);
}
fn draw_image(&mut self, image: Pin<&items::ImageItem>, item_rc: &ItemRc, size: LogicalSize) {
let dest_rect: qttypes::QRectF = check_geometry!(size);
self.draw_image_impl(
item_rc,
items::ImageItem::FIELD_OFFSETS.source.apply_pin(image),
dest_rect,
None,
items::ImageItem::FIELD_OFFSETS.width.apply_pin(image),
items::ImageItem::FIELD_OFFSETS.height.apply_pin(image),
image.image_fit(),
image.image_rendering(),
items::ImageItem::FIELD_OFFSETS.colorize.apply_pin(image),
);
}
fn draw_clipped_image(
&mut self,
image: Pin<&items::ClippedImage>,
item_rc: &ItemRc,
size: LogicalSize,
) {
let dest_rect: qttypes::QRectF = check_geometry!(size);
let source_rect = qttypes::QRectF {
x: image.source_clip_x() as _,
y: image.source_clip_y() as _,
width: image.source_clip_width() as _,
height: image.source_clip_height() as _,
};
self.draw_image_impl(
item_rc,
items::ClippedImage::FIELD_OFFSETS.source.apply_pin(image),
dest_rect,
Some(source_rect),
items::ClippedImage::FIELD_OFFSETS.width.apply_pin(image),
items::ClippedImage::FIELD_OFFSETS.height.apply_pin(image),
image.image_fit(),
image.image_rendering(),
items::ClippedImage::FIELD_OFFSETS.colorize.apply_pin(image),
);
}
fn draw_text(&mut self, text: std::pin::Pin<&items::Text>, _: &ItemRc, size: LogicalSize) {
let rect: qttypes::QRectF = check_geometry!(size);
let fill_brush: qttypes::QBrush = into_qbrush(text.color(), rect.width, rect.height);
let mut string: qttypes::QString = text.text().as_str().into();
let font: QFont = get_font(text.font_request(WindowInner::from_pub(self.window)));
let flags = match text.horizontal_alignment() {
TextHorizontalAlignment::Left => key_generated::Qt_AlignmentFlag_AlignLeft,
TextHorizontalAlignment::Center => key_generated::Qt_AlignmentFlag_AlignHCenter,
TextHorizontalAlignment::Right => key_generated::Qt_AlignmentFlag_AlignRight,
} | match text.vertical_alignment() {
TextVerticalAlignment::Top => key_generated::Qt_AlignmentFlag_AlignTop,
TextVerticalAlignment::Center => key_generated::Qt_AlignmentFlag_AlignVCenter,
TextVerticalAlignment::Bottom => key_generated::Qt_AlignmentFlag_AlignBottom,
} | match text.wrap() {
TextWrap::NoWrap => 0,
TextWrap::WordWrap => key_generated::Qt_TextFlag_TextWordWrap,
};
let elide = text.overflow() == TextOverflow::Elide;
let painter: &mut QPainterPtr = &mut self.painter;
cpp! { unsafe [painter as "QPainterPtr*", rect as "QRectF", fill_brush as "QBrush", mut string as "QString", flags as "int", font as "QFont", elide as "bool"] {
(*painter)->setFont(font);
(*painter)->setPen(QPen(fill_brush, 0));
(*painter)->setBrush(Qt::NoBrush);
if (!elide) {
(*painter)->drawText(rect, flags, string);
} else if (!(flags & Qt::TextWordWrap)) {
QString elided;
QFontMetrics fm(font);
while (!string.isEmpty()) {
int pos = string.indexOf('\n');
if (pos < 0) {
elided += fm.elidedText(string, Qt::ElideRight, rect.width());
break;
}
QString line = string.left(pos);
elided += fm.elidedText(line, Qt::ElideRight, rect.width());
elided += '\n';
string = string.mid(pos + 1);
}
(*painter)->drawText(rect, flags, elided);
} else {
// elide and word wrap: we need to add the ellipsis manually on the last line
string.replace(QChar('\n'), QChar::LineSeparator);
QString elided = string;
QFontMetrics fm(font);
QTextLayout layout(string, font);
QTextOption options;
options.setWrapMode(QTextOption::WordWrap);
layout.setTextOption(options);
layout.setCacheEnabled(true);
layout.beginLayout();
int leading = fm.leading();
qreal height = 0;
int last_line_begin = 0, last_line_size = 0;
while (true) {
auto line = layout.createLine();
if (!line.isValid()) {
last_line_begin = string.size();
break;
}
line.setLineWidth(rect.width());
height += leading + line.height();
if (height > rect.height()) {
break;
}
last_line_begin = line.textStart();
last_line_size = line.textLength();
}
if (last_line_begin < string.size()) {
elided = string.left(last_line_begin);
QString to_elide = QStringView(string).mid(last_line_begin, last_line_size).trimmed() % QStringView(QT_UNICODE_LITERAL("…"));
elided += fm.elidedText(to_elide, Qt::ElideRight, rect.width());
}
(*painter)->drawText(rect, flags, elided);
}
}}
}
fn draw_text_input(
&mut self,
text_input: std::pin::Pin<&items::TextInput>,
_: &ItemRc,
size: LogicalSize,
) {
let rect: qttypes::QRectF = check_geometry!(size);
let fill_brush: qttypes::QBrush = into_qbrush(text_input.color(), rect.width, rect.height);
let font: QFont =
get_font(text_input.font_request(&WindowInner::from_pub(self.window).window_adapter()));
let flags = match text_input.horizontal_alignment() {
TextHorizontalAlignment::Left => key_generated::Qt_AlignmentFlag_AlignLeft,
TextHorizontalAlignment::Center => key_generated::Qt_AlignmentFlag_AlignHCenter,
TextHorizontalAlignment::Right => key_generated::Qt_AlignmentFlag_AlignRight,
} | match text_input.vertical_alignment() {
TextVerticalAlignment::Top => key_generated::Qt_AlignmentFlag_AlignTop,
TextVerticalAlignment::Center => key_generated::Qt_AlignmentFlag_AlignVCenter,
TextVerticalAlignment::Bottom => key_generated::Qt_AlignmentFlag_AlignBottom,
} | match text_input.wrap() {
TextWrap::NoWrap => 0,
TextWrap::WordWrap => key_generated::Qt_TextFlag_TextWordWrap,
};
let visual_representation = text_input.visual_representation(Some(qt_password_character));
let text = &visual_representation.text;
let mut string: qttypes::QString = text.as_str().into();
// convert byte offsets to offsets in Qt UTF-16 encoded string, as that's
// what QTextLayout expects.
let (
selection_start_as_offset,
selection_end_as_offset,
selection_foreground_color,
selection_background_color,
underline_selection,
): (usize, usize, u32, u32, bool) = if !visual_representation.preedit_range.is_empty() {
(
visual_representation.preedit_range.start,
visual_representation.preedit_range.end,
Color::default().as_argb_encoded(),
Color::default().as_argb_encoded(),
true,
)
} else {
(
visual_representation.selection_range.start,
visual_representation.selection_range.end,
text_input.selection_foreground_color().as_argb_encoded(),
text_input.selection_background_color().as_argb_encoded(),
false,
)
};
let selection_start_position: i32 = if selection_start_as_offset > 0 {
utf8_byte_offset_to_utf16_units(text.as_str(), selection_start_as_offset) as i32
} else {
0
};
let selection_end_position: i32 = if selection_end_as_offset > 0 {
utf8_byte_offset_to_utf16_units(text.as_str(), selection_end_as_offset) as i32
} else {
0
};
let (text_cursor_width, cursor_position): (f32, i32) =
if let Some(cursor_offset) = visual_representation.cursor_position {
(
text_input.text_cursor_width().get(),
utf8_byte_offset_to_utf16_units(text.as_str(), cursor_offset) as i32,
)
} else {
(0., 0)
};
let single_line: bool = text_input.single_line();
let painter: &mut QPainterPtr = &mut self.painter;
cpp! { unsafe [
painter as "QPainterPtr*",
rect as "QRectF",
fill_brush as "QBrush",
selection_foreground_color as "QRgb",
selection_background_color as "QRgb",
underline_selection as "bool",
mut string as "QString",
flags as "int",
single_line as "bool",
font as "QFont",
selection_start_position as "int",
selection_end_position as "int",
cursor_position as "int",
text_cursor_width as "float"] {
if (!single_line) {
string.replace(QChar('\n'), QChar::LineSeparator);
}
QTextLayout layout(string, font);
do_text_layout(layout, flags, rect);
(*painter)->setPen(QPen(fill_brush, 0));
QVector<QTextLayout::FormatRange> selections;
if (selection_end_position != selection_start_position) {
QTextCharFormat fmt;
if (qAlpha(selection_background_color) != 0) {
fmt.setBackground(QColor::fromRgba(selection_background_color));
}
if (qAlpha(selection_background_color) != 0) {
fmt.setForeground(QColor::fromRgba(selection_foreground_color));
}
if (underline_selection) {
fmt.setFontUnderline(true);
}
selections << QTextLayout::FormatRange{
std::min(selection_end_position, selection_start_position),
std::abs(selection_end_position - selection_start_position),
fmt
};
}
layout.draw(painter->get(), rect.topLeft(), selections);
if (text_cursor_width > 0) {
layout.drawCursor(painter->get(), rect.topLeft(), cursor_position, text_cursor_width);
}
}}
}
fn draw_path(&mut self, path: Pin<&items::Path>, _: &ItemRc, size: LogicalSize) {
let (offset, path_events) = match path.fitted_path_events() {
Some(offset_and_events) => offset_and_events,
None => return,
};
let rect: qttypes::QRectF = check_geometry!(size);
let fill_brush: qttypes::QBrush = into_qbrush(path.fill(), rect.width, rect.height);
let stroke_brush: qttypes::QBrush = into_qbrush(path.stroke(), rect.width, rect.height);
let stroke_width: f32 = path.stroke_width().get();
let pos = qttypes::QPoint { x: offset.x as _, y: offset.y as _ };
let mut painter_path = QPainterPath::default();
painter_path.set_fill_rule(match path.fill_rule() {
FillRule::Nonzero => key_generated::Qt_FillRule_WindingFill,
FillRule::Evenodd => key_generated::Qt_FillRule_OddEvenFill,
});
for x in path_events.iter() {
fn to_qpointf(p: Point) -> qttypes::QPointF {
qttypes::QPointF { x: p.x as _, y: p.y as _ }
}
match x {
lyon_path::Event::Begin { at } => {
painter_path.move_to(to_qpointf(at));
}
lyon_path::Event::Line { from: _, to } => {
painter_path.line_to(to_qpointf(to));
}
lyon_path::Event::Quadratic { from: _, ctrl, to } => {
painter_path.quad_to(to_qpointf(ctrl), to_qpointf(to));
}
lyon_path::Event::Cubic { from: _, ctrl1, ctrl2, to } => {
painter_path.cubic_to(to_qpointf(ctrl1), to_qpointf(ctrl2), to_qpointf(to));
}
lyon_path::Event::End { last: _, first: _, close } => {
// FIXME: are we supposed to do something with last and first?
if close {
painter_path.close()
}
}
}
}
let painter: &mut QPainterPtr = &mut self.painter;
cpp! { unsafe [
painter as "QPainterPtr*",
pos as "QPoint",
mut painter_path as "QPainterPath",
fill_brush as "QBrush",
stroke_brush as "QBrush",
stroke_width as "float"] {
(*painter)->save();
auto cleanup = qScopeGuard([&] { (*painter)->restore(); });
(*painter)->translate(pos);
(*painter)->setPen(stroke_width > 0 ? QPen(stroke_brush, stroke_width) : Qt::NoPen);
(*painter)->setBrush(fill_brush);
(*painter)->drawPath(painter_path);
}}
}
fn draw_box_shadow(
&mut self,
box_shadow: Pin<&items::BoxShadow>,
item_rc: &ItemRc,
_size: LogicalSize,
) {
let pixmap : qttypes::QPixmap = self.cache.get_or_update_cache_entry( item_rc, || {
let shadow_rect = check_geometry!(box_shadow.geometry().size);
let source_size = qttypes::QSize {
width: shadow_rect.width.ceil() as _,
height: shadow_rect.height.ceil() as _,
};
let mut source_image =
qttypes::QImage::new(source_size, qttypes::ImageFormat::ARGB32_Premultiplied);
source_image.fill(qttypes::QColor::from_rgba_f(0., 0., 0., 0.));
let img = &mut source_image;
let mut painter_ = cpp!(unsafe [img as "QImage*"] -> QPainterPtr as "QPainterPtr" {
return std::make_unique<QPainter>(img);
});
Self::draw_rectangle_impl(
&mut painter_,
qttypes::QRectF { x: 0., y: 0., width: shadow_rect.width, height: shadow_rect.height },
Brush::SolidColor(box_shadow.color()),
Brush::default(),
0.,
box_shadow.border_radius().get(),
);
drop(painter_);
let blur_radius = box_shadow.blur().get();
if blur_radius > 0. {
cpp! {
unsafe[img as "QImage*", blur_radius as "float"] -> qttypes::QPixmap as "QPixmap" {
class PublicGraphicsBlurEffect : public QGraphicsBlurEffect {
public:
// Make public what's protected
using QGraphicsBlurEffect::draw;
};
// Need a scene for the effect source private to draw()
QGraphicsScene scene;
auto pixmap_item = scene.addPixmap(QPixmap::fromImage(*img));
auto blur_effect = new PublicGraphicsBlurEffect;
blur_effect->setBlurRadius(blur_radius);
blur_effect->setBlurHints(QGraphicsBlurEffect::QualityHint);
// takes ownership of the effect and registers the item with
// the effect as source.
pixmap_item->setGraphicsEffect(blur_effect);
QImage blurred_scene(img->width() + 2 * blur_radius, img->height() + 2 * blur_radius, QImage::Format_ARGB32_Premultiplied);
blurred_scene.fill(Qt::transparent);
QPainter p(&blurred_scene);
p.translate(blur_radius, blur_radius);
blur_effect->draw(&p);
p.end();
return QPixmap::fromImage(blurred_scene);
}}
} else {
cpp! { unsafe[img as "QImage*"] -> qttypes::QPixmap as "QPixmap" {
return QPixmap::fromImage(*img);
}}
}
});
let blur_radius = box_shadow.blur();
let shadow_offset = qttypes::QPointF {
x: (box_shadow.offset_x() - blur_radius).get() as f64,
y: (box_shadow.offset_y() - blur_radius).get() as f64,
};
let painter: &mut QPainterPtr = &mut self.painter;
cpp! { unsafe [
painter as "QPainterPtr*",
shadow_offset as "QPointF",
pixmap as "QPixmap"
] {
(*painter)->drawPixmap(shadow_offset, pixmap);
}}
}
fn visit_opacity(
&mut self,
opacity_item: Pin<&Opacity>,
item_rc: &ItemRc,
_size: LogicalSize,
) -> RenderingResult {
let opacity = opacity_item.opacity();
if Opacity::need_layer(item_rc, opacity) {
self.render_and_blend_layer(opacity, item_rc)
} else {
self.apply_opacity(opacity);
self.cache.release(item_rc);
RenderingResult::ContinueRenderingChildren
}
}
fn visit_layer(
&mut self,
layer_item: Pin<&Layer>,
self_rc: &ItemRc,
_size: LogicalSize,
) -> RenderingResult {
if layer_item.cache_rendering_hint() {
self.render_and_blend_layer(1.0, self_rc)
} else {
RenderingResult::ContinueRenderingChildren
}
}
fn combine_clip(
&mut self,
rect: LogicalRect,
radius: LogicalLength,
border_width: LogicalLength,
) -> bool {
let mut border_width: f32 = border_width.get();
let mut clip_rect = qttypes::QRectF {
x: rect.min_x() as _,
y: rect.min_y() as _,
width: rect.width() as _,
height: rect.height() as _,
};
adjust_rect_and_border_for_inner_drawing(&mut clip_rect, &mut border_width);
let painter: &mut QPainterPtr = &mut self.painter;
cpp! { unsafe [painter as "QPainterPtr*", clip_rect as "QRectF", radius as "float"] -> bool as "bool" {
if (radius <= 0) {
(*painter)->setClipRect(clip_rect, Qt::IntersectClip);
} else {
QPainterPath path;
path.addRoundedRect(clip_rect, radius, radius);
(*painter)->setClipPath(path, Qt::IntersectClip);
}
return !(*painter)->clipBoundingRect().isEmpty();
}}
}
fn get_current_clip(&self) -> LogicalRect {
let painter: &QPainterPtr = &self.painter;
let res = cpp! { unsafe [painter as "const QPainterPtr*" ] -> qttypes::QRectF as "QRectF" {
return (*painter)->clipBoundingRect();
}};
LogicalRect::new(
LogicalPoint::new(res.x as _, res.y as _),
LogicalSize::new(res.width as _, res.height as _),
)
}
fn save_state(&mut self) {
self.painter.save()
}
fn restore_state(&mut self) {
self.painter.restore()
}
fn scale_factor(&self) -> f32 {
1.
/* cpp! { unsafe [painter as "QPainterPtr*"] -> f32 as "float" {
return (*painter)->paintEngine()->paintDevice()->devicePixelRatioF();
}} */
}
fn draw_cached_pixmap(
&mut self,
_item_rc: &ItemRc,
update_fn: &dyn Fn(&mut dyn FnMut(u32, u32, &[u8])),
) {
update_fn(&mut |width: u32, height: u32, data: &[u8]| {
let data = data.as_ptr();
let painter: &mut QPainterPtr = &mut self.painter;
cpp! { unsafe [painter as "QPainterPtr*", width as "int", height as "int", data as "const unsigned char *"] {
QImage img(data, width, height, width * 4, QImage::Format_RGBA8888_Premultiplied);
(*painter)->drawImage(QPoint(), img);
}}
})
}
fn draw_string(&mut self, string: &str, color: Color) {
let fill_brush: qttypes::QBrush = into_qbrush(color.into(), 1., 1.);
let mut string: qttypes::QString = string.into();
let font: QFont = get_font(Default::default());
let painter: &mut QPainterPtr = &mut self.painter;
cpp! { unsafe [painter as "QPainterPtr*", fill_brush as "QBrush", mut string as "QString", font as "QFont"] {
(*painter)->setFont(font);
(*painter)->setPen(QPen(fill_brush, 0));
(*painter)->setBrush(Qt::NoBrush);
(*painter)->drawText(0, QFontMetrics((*painter)->font()).ascent(), string);
}}
}
fn draw_image_direct(&mut self, _image: i_slint_core::graphics::Image) {
todo!()
}
fn window(&self) -> &i_slint_core::window::WindowInner {
i_slint_core::window::WindowInner::from_pub(self.window)
}
fn as_any(&mut self) -> Option<&mut dyn std::any::Any> {
Some(&mut self.painter)
}
fn translate(&mut self, distance: LogicalVector) {
let x: f32 = distance.x;
let y: f32 = distance.y;
let painter: &mut QPainterPtr = &mut self.painter;
cpp! { unsafe [painter as "QPainterPtr*", x as "float", y as "float"] {
(*painter)->translate(x, y);
}}
}
fn rotate(&mut self, angle_in_degrees: f32) {
let painter: &mut QPainterPtr = &mut self.painter;
cpp! { unsafe [painter as "QPainterPtr*", angle_in_degrees as "float"] {
(*painter)->rotate(angle_in_degrees);
}}
}
fn apply_opacity(&mut self, opacity: f32) {
let painter: &mut QPainterPtr = &mut self.painter;
cpp! { unsafe [painter as "QPainterPtr*", opacity as "float"] {
(*painter)->setOpacity((*painter)->opacity() * opacity);
}}
}
fn metrics(&self) -> RenderingMetrics {
self.metrics.clone()
}
}
fn shared_image_buffer_to_pixmap(buffer: &SharedImageBuffer) -> Option<qttypes::QPixmap> {
let (format, bytes_per_line, buffer_ptr) = match buffer {
SharedImageBuffer::RGBA8(img) => {
(qttypes::ImageFormat::RGBA8888, img.width() * 4, img.as_bytes().as_ptr())
}
SharedImageBuffer::RGBA8Premultiplied(img) => {
(qttypes::ImageFormat::RGBA8888_Premultiplied, img.width() * 4, img.as_bytes().as_ptr())
}
SharedImageBuffer::RGB8(img) => {
(qttypes::ImageFormat::RGB888, img.width() * 3, img.as_bytes().as_ptr())
}
};
let width: i32 = buffer.width() as _;
let height: i32 = buffer.height() as _;
let pixmap = cpp! { unsafe [format as "QImage::Format", width as "int", height as "int", bytes_per_line as "uint32_t", buffer_ptr as "const uchar *"] -> qttypes::QPixmap as "QPixmap" {
QImage img(buffer_ptr, width, height, bytes_per_line, format);
return QPixmap::fromImage(img);
} };
Some(pixmap)
}
pub(crate) fn image_to_pixmap(
image: &ImageInner,
source_size: Option<euclid::Size2D<u32, PhysicalPx>>,
) -> Option<qttypes::QPixmap> {
shared_image_buffer_to_pixmap(&image.render_to_buffer(source_size)?)
}
/// Changes the source or the destination rectangle to respect the image fit
fn adjust_to_image_fit(
image_fit: ImageFit,
source_rect: &mut qttypes::QRectF,
dest_rect: &mut qttypes::QRectF,
) {
match image_fit {
i_slint_core::items::ImageFit::Fill => (),
i_slint_core::items::ImageFit::Cover => {
let ratio = qttypes::qreal::max(
dest_rect.width / source_rect.width,
dest_rect.height / source_rect.height,
);
if source_rect.width > dest_rect.width / ratio {
source_rect.x += (source_rect.width - dest_rect.width / ratio) / 2.;
source_rect.width = dest_rect.width / ratio;
}
if source_rect.height > dest_rect.height / ratio {
source_rect.y += (source_rect.height - dest_rect.height / ratio) / 2.;
source_rect.height = dest_rect.height / ratio;
}
}
i_slint_core::items::ImageFit::Contain => {
let ratio = qttypes::qreal::min(
dest_rect.width / source_rect.width,
dest_rect.height / source_rect.height,
);
if dest_rect.width > source_rect.width * ratio {
dest_rect.x += (dest_rect.width - source_rect.width * ratio) / 2.;
dest_rect.width = source_rect.width * ratio;
}
if dest_rect.height > source_rect.height * ratio {
dest_rect.y += (dest_rect.height - source_rect.height * ratio) / 2.;
dest_rect.height = source_rect.height * ratio;
}
}
};
}
impl QtItemRenderer<'_> {
fn draw_image_impl(
&mut self,
item_rc: &ItemRc,
source_property: Pin<&Property<Image>>,
dest_rect: qttypes::QRectF,
source_rect: Option<qttypes::QRectF>,
target_width: std::pin::Pin<&Property<LogicalLength>>,
target_height: std::pin::Pin<&Property<LogicalLength>>,
image_fit: ImageFit,
rendering: ImageRendering,
colorize_property: Pin<&Property<Brush>>,
) {
// Caller ensured that zero/negative width/height resulted in an early return via get_geometry!.
debug_assert!(target_width.get() > LogicalLength::zero());
debug_assert!(target_height.get() > LogicalLength::zero());
let pixmap: qttypes::QPixmap = self.cache.get_or_update_cache_entry(item_rc, || {
let source = source_property.get();
let origin = source.size();
let source: &ImageInner = (&source).into();
// Query target_width/height here again to ensure that changes will invalidate the item rendering cache.
let t =
euclid::size2(target_width.get().get(), target_height.get().get()).cast::<f64>();
let source_size = if source.is_svg() {
let has_source_clipping = source_rect.map_or(false, |rect| {
rect.is_valid()
&& (rect.x != 0.
|| rect.y != 0.
|| !rect.width.approx_eq(&t.width)
|| !rect.height.approx_eq(&t.height))
});
if has_source_clipping {
// Source size & clipping is not implemented yet
None
} else {
Some(i_slint_core::graphics::fit_size(image_fit, t.cast(), origin).cast())
}
} else {
None
};
image_to_pixmap(source, source_size).map_or_else(
Default::default,
|mut pixmap: qttypes::QPixmap| {
let colorize = colorize_property.get();
if !colorize.is_transparent() {
let brush: qttypes::QBrush =
into_qbrush(colorize, dest_rect.width, dest_rect.height);
cpp!(unsafe [mut pixmap as "QPixmap", brush as "QBrush"] {
QPainter p(&pixmap);
p.setCompositionMode(QPainter::CompositionMode_SourceIn);
p.fillRect(QRect(QPoint(), pixmap.size()), brush);
});
}
pixmap
},
)
});
let image_size = pixmap.size();
let mut source_rect = source_rect.filter(|r| r.is_valid()).unwrap_or(qttypes::QRectF {
x: 0.,
y: 0.,
width: image_size.width as _,
height: image_size.height as _,
});
let mut dest_rect = dest_rect;
adjust_to_image_fit(image_fit, &mut source_rect, &mut dest_rect);
let painter: &mut QPainterPtr = &mut self.painter;
let smooth: bool = rendering == ImageRendering::Smooth;
cpp! { unsafe [
painter as "QPainterPtr*",
pixmap as "QPixmap",
source_rect as "QRectF",
dest_rect as "QRectF",
smooth as "bool"] {
(*painter)->save();
(*painter)->setRenderHint(QPainter::SmoothPixmapTransform, smooth);
(*painter)->drawPixmap(dest_rect, pixmap, source_rect);
(*painter)->restore();
}};
}
fn draw_rectangle_impl(
painter: &mut QPainterPtr,
mut rect: qttypes::QRectF,
brush: Brush,
border_color: Brush,
mut border_width: f32,
border_radius: f32,
) {
if border_color.is_transparent() {
border_width = 0.;
};
let brush: qttypes::QBrush = into_qbrush(brush, rect.width, rect.height);
let border_color: qttypes::QBrush = into_qbrush(border_color, rect.width, rect.height);
cpp! { unsafe [painter as "QPainterPtr*", brush as "QBrush", border_color as "QBrush", border_width as "float", border_radius as "float", mut rect as "QRectF"] {
(*painter)->setBrush(brush);
QPen pen = border_width > 0 ? QPen(border_color, border_width, Qt::SolidLine, Qt::FlatCap, Qt::MiterJoin) : Qt::NoPen;
if (border_radius > 0) {
if (!border_color.isOpaque() && border_width > 1) {
// See adjustment bellow
float r = qMax(border_width/2, border_radius);
// In case of transparent pen, we want the background to cover the whole rectangle, which Qt doesn't do.
// So first draw the background, then draw the pen over it
(*painter)->setPen(Qt::NoPen);
(*painter)->drawRoundedRect(rect, r, r);
(*painter)->setBrush(QBrush());
}
// Qt's border radius is in the middle of the border. But we want it to be the radius of the rectangle itself.
// This is incorrect if border_radius < border_width/2, but this can't be fixed. Better to have a radius a bit too big than no radius at all
float r = qMax(0.01f, border_radius - border_width / 2);
rect.adjust(border_width / 2, border_width / 2, -border_width / 2, -border_width / 2);
(*painter)->setPen(pen);
(*painter)->drawRoundedRect(rect, r, r);
} else {
if (!border_color.isOpaque() && border_width > 1) {
// In case of transparent pen, we want the background to cover the whole rectangle, which Qt doesn't do.
// So first draw the background, then draw the pen over it
(*painter)->setPen(Qt::NoPen);
(*painter)->drawRect(rect);
(*painter)->setBrush(QBrush());
}
rect.adjust(border_width / 2, border_width / 2, -border_width / 2, -border_width / 2);
(*painter)->setPen(pen);
(*painter)->drawRect(rect);
}
}}
}
fn render_layer(
&mut self,
item_rc: &ItemRc,
layer_size_fn: &dyn Fn() -> LogicalSize,
) -> qttypes::QPixmap {
self.cache.get_or_update_cache_entry(item_rc, || {
let painter: &mut QPainterPtr = &mut self.painter;
let dpr = cpp! { unsafe [painter as "QPainterPtr*"] -> f32 as "float" {
return (*painter)->paintEngine()->paintDevice()->devicePixelRatioF();
}};
let layer_size = layer_size_fn();
let layer_size = qttypes::QSize {
width: (layer_size.width * dpr) as _,
height: (layer_size.height * dpr) as _,
};
let mut layer_image = qttypes::QImage::new(layer_size, qttypes::ImageFormat::ARGB32_Premultiplied);
layer_image.fill(qttypes::QColor::from_rgba_f(0., 0., 0., 0.));
*self.metrics.layers_created.as_mut().unwrap() += 1;
let img_ref: &mut qttypes::QImage = &mut layer_image;
let mut layer_painter = cpp!(unsafe [img_ref as "QImage*", dpr as "float"] -> QPainterPtr as "QPainterPtr" {
img_ref->setDevicePixelRatio(dpr);
auto painter = std::make_unique<QPainter>(img_ref);
painter->setClipRect(0, 0, img_ref->width(), img_ref->height());
painter->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
return painter;
});
std::mem::swap(&mut self.painter, &mut layer_painter);
i_slint_core::item_rendering::render_item_children(
self,
&item_rc.component(),
item_rc.index() as isize,
);
std::mem::swap(&mut self.painter, &mut layer_painter);
drop(layer_painter);
qttypes::QPixmap::from(layer_image)
})
}
fn render_and_blend_layer(&mut self, alpha_tint: f32, self_rc: &ItemRc) -> RenderingResult {
let current_clip = self.get_current_clip();
let mut layer_image = self.render_layer(self_rc, &|| {
// We don't need to include the size of the opacity item itself, since it has no content.
let children_rect = i_slint_core::properties::evaluate_no_tracking(|| {
self_rc.geometry().union(
&i_slint_core::item_rendering::item_children_bounding_rect(
&self_rc.component(),
self_rc.index() as isize,
&current_clip,
),
)
});
children_rect.size
});
self.save_state();
self.apply_opacity(alpha_tint);
{
let painter: &mut QPainterPtr = &mut self.painter;
let layer_image_ref: &mut qttypes::QPixmap = &mut layer_image;
cpp! { unsafe [
painter as "QPainterPtr*",
layer_image_ref as "QPixmap*"
] {
(*painter)->drawPixmap(0, 0, *layer_image_ref);
}}
}
self.restore_state();
RenderingResult::ContinueRenderingWithoutChildren
}
}
cpp_class!(pub(crate) unsafe struct QWidgetPtr as "std::unique_ptr<QWidget>");
pub struct QtWindow {
widget_ptr: QWidgetPtr,
pub(crate) window: i_slint_core::api::Window,
self_weak: Weak<Self>,
rendering_metrics_collector: RefCell<Option<Rc<RenderingMetricsCollector>>>,
cache: ItemCache<qttypes::QPixmap>,
tree_structure_changed: RefCell<bool>,
dark_color_scheme: OnceCell<Pin<Box<Property<bool>>>>,
}
impl QtWindow {
pub fn new() -> Rc<Self> {
let rc = Rc::new_cyclic(|self_weak| {
let window_ptr = self_weak.clone().into_raw();
let widget_ptr = cpp! {unsafe [window_ptr as "void*"] -> QWidgetPtr as "std::unique_ptr<QWidget>" {
ensure_initialized(true);
auto widget = std::make_unique<SlintWidget>();
auto accessibility = new Slint_accessible_window(widget.get(), window_ptr);
QAccessible::registerAccessibleInterface(accessibility);
return widget;
}};
QtWindow {
widget_ptr,
window: i_slint_core::api::Window::new(self_weak.clone() as _),
self_weak: self_weak.clone(),
rendering_metrics_collector: Default::default(),
cache: Default::default(),
tree_structure_changed: RefCell::new(false),
dark_color_scheme: Default::default(),
}
});
let widget_ptr = rc.widget_ptr();
let rust_window = Rc::as_ptr(&rc);
cpp! {unsafe [widget_ptr as "SlintWidget*", rust_window as "void*"] {
widget_ptr->rust_window = rust_window;
}};
ALL_WINDOWS.with(|aw| aw.borrow_mut().push(rc.self_weak.clone()));
rc
}
/// Return the QWidget*
fn widget_ptr(&self) -> NonNull<()> {
unsafe { std::mem::transmute_copy::<QWidgetPtr, NonNull<_>>(&self.widget_ptr) }
}
fn paint_event(&self, painter: QPainterPtr) {
let runtime_window = WindowInner::from_pub(&self.window);
runtime_window.draw_contents(|components| {
i_slint_core::animations::update_animations();
let mut renderer = QtItemRenderer {
painter,
cache: &self.cache,
window: &self.window,
metrics: RenderingMetrics { layers_created: Some(0) },
};
for (component, origin) in components {
i_slint_core::item_rendering::render_component_items(
component,
&mut renderer,
*origin,
);
}
if let Some(collector) = &*self.rendering_metrics_collector.borrow() {
collector.measure_frame_rendered(&mut renderer);
}
i_slint_core::animations::CURRENT_ANIMATION_DRIVER.with(|driver| {
if !driver.has_active_animations() {
return;
}
let widget_ptr = self.widget_ptr();
cpp! {unsafe [widget_ptr as "QWidget*"] {
// FIXME: using QTimer -::singleShot is not optimal. We should use Qt animation timer
QTimer::singleShot(16, [widget_ptr = QPointer<QWidget>(widget_ptr)] {
if (widget_ptr)
widget_ptr->update();
});
//return widget_ptr->update();
}}
});
});
// Update the accessibility tree (if the component tree has changed)
if self.tree_structure_changed.replace(false) {
let widget_ptr = self.widget_ptr();
cpp! { unsafe [widget_ptr as "QWidget*"] {
auto accessible = dynamic_cast<Slint_accessible_window*>(QAccessible::queryAccessibleInterface(widget_ptr));
if (accessible->isUsed()) { accessible->updateAccessibilityTree(); }
}};
}
timer_event();
}
fn resize_event(&self, size: qttypes::QSize) {
self.window().dispatch_event(WindowEvent::Resized {
size: i_slint_core::api::LogicalSize::new(size.width as _, size.height as _),
});
}
fn mouse_event(&self, event: MouseEvent) {
WindowInner::from_pub(&self.window).process_mouse_input(event);
timer_event();
}
fn key_event(&self, key: i32, text: qttypes::QString, released: bool) {
i_slint_core::animations::update_animations();
let text: String = text.into();
let text = qt_key_to_string(key as key_generated::Qt_Key, text);
let event = if released {
WindowEvent::KeyReleased { text }
} else {
WindowEvent::KeyPressed { text }
};
self.window.dispatch_event(event);
timer_event();
}
fn close_popup(&self) {
WindowInner::from_pub(&self.window).close_popup();
}
fn close_popup_after_click(&self) -> bool {
WindowInner::from_pub(&self.window).close_popup_after_click()
}
}
impl WindowAdapter for QtWindow {
fn window(&self) -> &i_slint_core::api::Window {
&self.window
}
fn renderer(&self) -> &dyn Renderer {
self
}
fn set_visible(&self, visible: bool) -> Result<(), PlatformError> {
if visible {
let component_rc = WindowInner::from_pub(&self.window).component();
let component = ComponentRc::borrow_pin(&component_rc);
let root_item = component.as_ref().get_item_ref(0);
if let Some(window_item) = ItemRef::downcast_pin::<WindowItem>(root_item) {
if window_item.width() <= LogicalLength::zero() {
window_item.width.set(LogicalLength::new(
component.as_ref().layout_info(Orientation::Horizontal).preferred_bounded(),
))
}
if window_item.height() <= LogicalLength::zero() {
window_item.height.set(LogicalLength::new(
component.as_ref().layout_info(Orientation::Vertical).preferred_bounded(),
))
}
self.apply_window_properties(window_item);
}
let widget_ptr = self.widget_ptr();
let fullscreen = std::env::var("SLINT_FULLSCREEN").is_ok();
cpp! {unsafe [widget_ptr as "QWidget*", fullscreen as "bool"] {
if (fullscreen) {
widget_ptr->setWindowState(Qt::WindowFullScreen);
}
widget_ptr->show();
}};
let qt_platform_name = cpp! {unsafe [] -> qttypes::QString as "QString" {
return QGuiApplication::platformName();
}};
*self.rendering_metrics_collector.borrow_mut() = RenderingMetricsCollector::new(
&format!("Qt backend (platform {})", qt_platform_name),
);
Ok(())
} else {
self.rendering_metrics_collector.take();
let widget_ptr = self.widget_ptr();
cpp! {unsafe [widget_ptr as "QWidget*"] {
widget_ptr->hide();
// Since we don't call close(), this will force Qt to recompute wether there are any
// visible windows, and ends the application if needed
QEventLoopLocker();
}};
Ok(())
}
}
fn position(&self) -> Option<i_slint_core::api::PhysicalPosition> {
let widget_ptr = self.widget_ptr();
let qp = cpp! {unsafe [widget_ptr as "QWidget*"] -> qttypes::QPoint as "QPoint" {
return widget_ptr->pos();
}};
// Qt returns logical coordinates, so scale those!
i_slint_core::api::LogicalPosition::new(qp.x as _, qp.y as _)
.to_physical(self.window().scale_factor())
.into()
}
fn set_position(&self, position: i_slint_core::api::WindowPosition) {
let physical_position = position.to_physical(self.window().scale_factor());
let widget_ptr = self.widget_ptr();
let pos = qttypes::QPoint { x: physical_position.x as _, y: physical_position.y as _ };
cpp! {unsafe [widget_ptr as "QWidget*", pos as "QPoint"] {
widget_ptr->move(pos);
}};
}
fn set_size(&self, size: i_slint_core::api::WindowSize) {
let logical_size = size.to_logical(self.window().scale_factor());
let widget_ptr = self.widget_ptr();
let sz = qttypes::QSize {
width: logical_size.width.round() as _,
height: logical_size.height.round() as _,
};
// Qt uses logical units!
cpp! {unsafe [widget_ptr as "QWidget*", sz as "QSize"] {
widget_ptr->resize(sz);
}};
}
fn size(&self) -> i_slint_core::api::PhysicalSize {
let widget_ptr = self.widget_ptr();
let s = cpp! {unsafe [widget_ptr as "QWidget*"] -> qttypes::QSize as "QSize" {
return widget_ptr->size();
}};
i_slint_core::api::PhysicalSize::new(s.width as _, s.height as _)
}
fn request_redraw(&self) {
let widget_ptr = self.widget_ptr();
cpp! {unsafe [widget_ptr as "QWidget*"] {
return widget_ptr->update();
}}
}
fn internal(&self, _: i_slint_core::InternalToken) -> Option<&dyn WindowAdapterInternal> {
Some(self)
}
}
impl WindowAdapterInternal for QtWindow {
/// Apply windows property such as title to the QWidget*
fn apply_window_properties(&self, window_item: Pin<&items::WindowItem>) {
let widget_ptr = self.widget_ptr();
let title: qttypes::QString = window_item.title().as_str().into();
let no_frame = window_item.no_frame();
let always_on_top = window_item.always_on_top();
let mut size = qttypes::QSize {
width: window_item.width().get().ceil() as _,
height: window_item.height().get().ceil() as _,
};
if size.width == 0 || size.height == 0 {
let existing_size = cpp!(unsafe [widget_ptr as "QWidget*"] -> qttypes::QSize as "QSize" {
return widget_ptr->size();
});
if size.width == 0 {
window_item.width.set(LogicalLength::new(existing_size.width as _));
size.width = existing_size.width;
}
if size.height == 0 {
window_item.height.set(LogicalLength::new(existing_size.height as _));
size.height = existing_size.height;
}
}
let background =
into_qbrush(window_item.background(), size.width.into(), size.height.into());
match (&window_item.icon()).into() {
&ImageInner::None => (),
r => {
if let Some(pixmap) = image_to_pixmap(r, None) {
cpp! {unsafe [widget_ptr as "QWidget*", pixmap as "QPixmap"] {
widget_ptr->setWindowIcon(QIcon(pixmap));
}};
}
}
};
cpp! {unsafe [widget_ptr as "QWidget*", title as "QString", size as "QSize", background as "QBrush", no_frame as "bool", always_on_top as "bool"] {
if (size != widget_ptr->size()) {
widget_ptr->resize(size.expandedTo({1, 1}));
}
widget_ptr->setWindowFlag(Qt::FramelessWindowHint, no_frame);
widget_ptr->setWindowFlag(Qt::WindowStaysOnTopHint, always_on_top);
widget_ptr->setWindowTitle(title);
auto pal = widget_ptr->palette();
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
// If the background color is the same as what NativeStyleMetrics supplied from QGuiApplication::palette().color(QPalette::Window),
// then the setColor (implicitly setBrush) call will not detach the palette. However it will set the resolveMask, which due to the
// lack of a detach changes QGuiApplicationPrivate::app_pal's resolve mask and thus breaks future theme based palette changes.
// Therefore we force a detach.
// https://bugreports.qt.io/browse/QTBUG-98762
{
pal.setResolveMask(~pal.resolveMask());
pal.setResolveMask(~pal.resolveMask());
}
#endif
pal.setBrush(QPalette::Window, background);
widget_ptr->setPalette(pal);
}};
}
/// Set the min/max sizes on the QWidget
fn apply_geometry_constraint(
&self,
constraints_h: i_slint_core::layout::LayoutInfo,
constraints_v: i_slint_core::layout::LayoutInfo,
) {
let widget_ptr = self.widget_ptr();
let (min_size, max_size) =
i_slint_core::layout::min_max_size_for_layout_constraints(constraints_h, constraints_v);
let min_size: qttypes::QSize = min_size.map_or_else(
|| qttypes::QSize { width: 0, height: 0 }, // (0x0) means unset min size for QWidget
|LogicalSize { width, height, .. }| qttypes::QSize {
width: width as u32,
height: height as u32,
},
);
let widget_size_max: u32 = 16_777_215;
let max_size: qttypes::QSize = max_size.map_or_else(
|| qttypes::QSize { width: widget_size_max, height: widget_size_max },
|LogicalSize { width, height, .. }| qttypes::QSize {
width: width as u32,
height: height as u32,
},
);
cpp! {unsafe [widget_ptr as "QWidget*", min_size as "QSize", max_size as "QSize"] {
widget_ptr->setMinimumSize(min_size);
widget_ptr->setMaximumSize(max_size);
}};
}
fn register_component(&self) {
self.tree_structure_changed.replace(true);
}
fn unregister_component(
&self,
_component: ComponentRef,
_: &mut dyn Iterator<Item = Pin<ItemRef<'_>>>,
) {
self.tree_structure_changed.replace(true);
}
fn create_popup(&self, geometry: LogicalRect) -> Option<Rc<dyn WindowAdapter>> {
let popup_window = QtWindow::new();
let size = qttypes::QSize { width: geometry.width() as _, height: geometry.height() as _ };
let popup_ptr = popup_window.widget_ptr();
let pos = qttypes::QPoint { x: geometry.origin.x as _, y: geometry.origin.y as _ };
let widget_ptr = self.widget_ptr();
cpp! {unsafe [widget_ptr as "QWidget*", popup_ptr as "QWidget*", pos as "QPoint", size as "QSize"] {
popup_ptr->setParent(widget_ptr, Qt::Popup);
popup_ptr->setGeometry(QRect(pos + widget_ptr->mapToGlobal(QPoint(0,0)), size));
popup_ptr->show();
}};
Some(popup_window as _)
}
fn set_mouse_cursor(&self, cursor: MouseCursor) {
let widget_ptr = self.widget_ptr();
//unidirectional resize cursors are replaced with bidirectional ones
let cursor_shape = match cursor {
MouseCursor::Default => key_generated::Qt_CursorShape_ArrowCursor,
MouseCursor::None => key_generated::Qt_CursorShape_BlankCursor,
MouseCursor::Help => key_generated::Qt_CursorShape_WhatsThisCursor,
MouseCursor::Pointer => key_generated::Qt_CursorShape_PointingHandCursor,
MouseCursor::Progress => key_generated::Qt_CursorShape_BusyCursor,
MouseCursor::Wait => key_generated::Qt_CursorShape_WaitCursor,
MouseCursor::Crosshair => key_generated::Qt_CursorShape_CrossCursor,
MouseCursor::Text => key_generated::Qt_CursorShape_IBeamCursor,
MouseCursor::Alias => key_generated::Qt_CursorShape_DragLinkCursor,
MouseCursor::Copy => key_generated::Qt_CursorShape_DragCopyCursor,
MouseCursor::Move => key_generated::Qt_CursorShape_DragMoveCursor,
MouseCursor::NoDrop => key_generated::Qt_CursorShape_ForbiddenCursor,
MouseCursor::NotAllowed => key_generated::Qt_CursorShape_ForbiddenCursor,
MouseCursor::Grab => key_generated::Qt_CursorShape_OpenHandCursor,
MouseCursor::Grabbing => key_generated::Qt_CursorShape_ClosedHandCursor,
MouseCursor::ColResize => key_generated::Qt_CursorShape_SplitHCursor,
MouseCursor::RowResize => key_generated::Qt_CursorShape_SplitVCursor,
MouseCursor::NResize => key_generated::Qt_CursorShape_SizeVerCursor,
MouseCursor::EResize => key_generated::Qt_CursorShape_SizeHorCursor,
MouseCursor::SResize => key_generated::Qt_CursorShape_SizeVerCursor,
MouseCursor::WResize => key_generated::Qt_CursorShape_SizeHorCursor,
MouseCursor::NeResize => key_generated::Qt_CursorShape_SizeBDiagCursor,
MouseCursor::NwResize => key_generated::Qt_CursorShape_SizeFDiagCursor,
MouseCursor::SeResize => key_generated::Qt_CursorShape_SizeFDiagCursor,
MouseCursor::SwResize => key_generated::Qt_CursorShape_SizeBDiagCursor,
MouseCursor::EwResize => key_generated::Qt_CursorShape_SizeHorCursor,
MouseCursor::NsResize => key_generated::Qt_CursorShape_SizeVerCursor,
MouseCursor::NeswResize => key_generated::Qt_CursorShape_SizeBDiagCursor,
MouseCursor::NwseResize => key_generated::Qt_CursorShape_SizeFDiagCursor,
};
cpp! {unsafe [widget_ptr as "QWidget*", cursor_shape as "Qt::CursorShape"] {
widget_ptr->setCursor(QCursor{cursor_shape});
}};
}
fn input_method_request(&self, request: i_slint_core::window::InputMethodRequest) {
let widget_ptr = self.widget_ptr();
match request {
i_slint_core::window::InputMethodRequest::Enable { input_type, .. } => {
let enable: bool = matches!(input_type, i_slint_core::items::InputType::Text);
cpp! {unsafe [widget_ptr as "QWidget*", enable as "bool"] {
widget_ptr->setAttribute(Qt::WA_InputMethodEnabled, enable);
}};
}
i_slint_core::window::InputMethodRequest::Disable { .. } => {
cpp! {unsafe [widget_ptr as "QWidget*"] {
widget_ptr->setAttribute(Qt::WA_InputMethodEnabled, false);
}};
}
i_slint_core::window::InputMethodRequest::SetPosition { position, .. } => {
let pos = qttypes::QPoint { x: position.x as _, y: position.y as _ };
let widget_ptr = self.widget_ptr();
cpp! {unsafe [widget_ptr as "SlintWidget*", pos as "QPoint"] {
widget_ptr->ime_position = pos;
QGuiApplication::inputMethod()->update(Qt::ImQueryInput);
}};
}
_ => {}
}
}
fn as_any(&self) -> &dyn std::any::Any {
self
}
fn handle_focus_change(&self, _old: Option<ItemRc>, new: Option<ItemRc>) {
let widget_ptr = self.widget_ptr();
if let Some(ai) = accessible_item(new) {
let item = &ai;
cpp! {unsafe [widget_ptr as "QWidget*", item as "void*"] {
auto accessible = QAccessible::queryAccessibleInterface(widget_ptr);
if (auto slint_accessible = dynamic_cast<Slint_accessible*>(accessible)) {
slint_accessible->clearFocus();
slint_accessible->focusItem(item);
}
}};
}
}
fn dark_color_scheme(&self) -> bool {
let ds = self.dark_color_scheme.get_or_init(|| {
Box::pin(Property::new(cpp! {unsafe [] -> bool as "bool" {
return qApp->palette().color(QPalette::Window).valueF() < 0.5;
}}))
});
ds.as_ref().get()
}
fn is_visible(&self) -> bool {
let widget_ptr = self.widget_ptr();
cpp! {unsafe [widget_ptr as "QWidget*"] -> bool as "bool" {
return widget_ptr->isVisible();
}}
}
}
impl i_slint_core::renderer::RendererSealed for QtWindow {
fn text_size(
&self,
font_request: FontRequest,
text: &str,
max_width: Option<LogicalLength>,
_scale_factor: ScaleFactor,
) -> LogicalSize {
get_font(font_request).text_size(text, max_width.map(|logical_width| logical_width.get()))
}
fn text_input_byte_offset_for_position(
&self,
text_input: Pin<&i_slint_core::items::TextInput>,
pos: LogicalPoint,
font_request: FontRequest,
_scale_factor: ScaleFactor,
) -> usize {
if pos.y < 0. {
return 0;
}
let rect: qttypes::QRectF = check_geometry!(text_input.geometry().size);
let pos = qttypes::QPointF { x: pos.x as _, y: pos.y as _ };
let font: QFont = get_font(font_request);
let visual_representation = text_input.visual_representation(Some(qt_password_character));
let string = qttypes::QString::from(visual_representation.text.as_str());
let flags = match text_input.horizontal_alignment() {
TextHorizontalAlignment::Left => key_generated::Qt_AlignmentFlag_AlignLeft,
TextHorizontalAlignment::Center => key_generated::Qt_AlignmentFlag_AlignHCenter,
TextHorizontalAlignment::Right => key_generated::Qt_AlignmentFlag_AlignRight,
} | match text_input.vertical_alignment() {
TextVerticalAlignment::Top => key_generated::Qt_AlignmentFlag_AlignTop,
TextVerticalAlignment::Center => key_generated::Qt_AlignmentFlag_AlignVCenter,
TextVerticalAlignment::Bottom => key_generated::Qt_AlignmentFlag_AlignBottom,
} | match text_input.wrap() {
TextWrap::NoWrap => 0,
TextWrap::WordWrap => key_generated::Qt_TextFlag_TextWordWrap,
};
let single_line: bool = text_input.single_line();
let byte_offset = cpp! { unsafe [font as "QFont", string as "QString", pos as "QPointF", flags as "int",
rect as "QRectF", single_line as "bool"] -> usize as "size_t" {
// we need to do the \n replacement in a copy because the original need to be kept to know the utf8 offset
auto copy = string;
if (!single_line) {
copy.replace(QChar('\n'), QChar::LineSeparator);
}
QTextLayout layout(copy, font);
auto line = do_text_layout(layout, flags, rect, pos.y());
if (line < 0 || layout.lineCount() <= line)
return string.toUtf8().size();
QTextLine textLine = layout.lineAt(line);
int cur;
if (pos.x() > textLine.naturalTextWidth()) {
cur = textLine.textStart() + textLine.textLength();
// cur is one past the last character of the line (eg, the \n or space).
// Go one back to get back on this line.
// Unless we were at the end of the text, in which case there was no \n
if (cur > textLine.textStart() && (cur < string.size() || string[cur-1] == '\n'))
cur--;
} else {
cur = textLine.xToCursor(pos.x());
}
if (cur < string.size() && string[cur].isLowSurrogate())
cur++;
// convert to an utf8 pos;
return QStringView(string).left(cur).toUtf8().size();
}};
visual_representation.map_byte_offset_from_byte_offset_in_visual_text(byte_offset)
}
fn text_input_cursor_rect_for_byte_offset(
&self,
text_input: Pin<&i_slint_core::items::TextInput>,
byte_offset: usize,
font_request: FontRequest,
_scale_factor: ScaleFactor,
) -> LogicalRect {
let rect: qttypes::QRectF = check_geometry!(text_input.geometry().size);
let font: QFont = get_font(font_request);
let text = text_input.text();
let mut string = qttypes::QString::from(text.as_str());
let offset: u32 = utf8_byte_offset_to_utf16_units(text.as_str(), byte_offset) as _;
let flags = match text_input.horizontal_alignment() {
TextHorizontalAlignment::Left => key_generated::Qt_AlignmentFlag_AlignLeft,
TextHorizontalAlignment::Center => key_generated::Qt_AlignmentFlag_AlignHCenter,
TextHorizontalAlignment::Right => key_generated::Qt_AlignmentFlag_AlignRight,
} | match text_input.vertical_alignment() {
TextVerticalAlignment::Top => key_generated::Qt_AlignmentFlag_AlignTop,
TextVerticalAlignment::Center => key_generated::Qt_AlignmentFlag_AlignVCenter,
TextVerticalAlignment::Bottom => key_generated::Qt_AlignmentFlag_AlignBottom,
} | match text_input.wrap() {
TextWrap::NoWrap => 0,
TextWrap::WordWrap => key_generated::Qt_TextFlag_TextWordWrap,
};
let single_line: bool = text_input.single_line();
let r = cpp! { unsafe [font as "QFont", mut string as "QString", offset as "int", flags as "int", rect as "QRectF", single_line as "bool"]
-> qttypes::QRectF as "QRectF" {
if (!single_line) {
string.replace(QChar('\n'), QChar::LineSeparator);
}
QTextLayout layout(string, font);
do_text_layout(layout, flags, rect);
QTextLine textLine = layout.lineForTextPosition(offset);
if (!textLine.isValid())
return QRectF();
return QRectF(textLine.x() + textLine.cursorToX(offset), layout.position().y() + textLine.y(), 1.0, textLine.height());
}};
LogicalRect::new(
LogicalPoint::new(r.x as _, r.y as _),
LogicalSize::new(r.width as _, r.height as _),
)
}
fn register_font_from_memory(
&self,
data: &'static [u8],
) -> Result<(), Box<dyn std::error::Error>> {
let data = qttypes::QByteArray::from(data);
cpp! {unsafe [data as "QByteArray"] {
ensure_initialized(true);
QFontDatabase::addApplicationFontFromData(data);
} }
Ok(())
}
fn register_font_from_path(
&self,
path: &std::path::Path,
) -> Result<(), Box<dyn std::error::Error>> {
let encoded_path: qttypes::QByteArray = path.to_string_lossy().as_bytes().into();
cpp! {unsafe [encoded_path as "QByteArray"] {
ensure_initialized(true);
QString requested_path = QFileInfo(QFile::decodeName(encoded_path)).canonicalFilePath();
static QSet<QString> loaded_app_fonts;
// QFontDatabase::addApplicationFont unconditionally reads the provided file from disk,
// while we want to do this only once to avoid things like the live-review going crazy.
if (!loaded_app_fonts.contains(requested_path)) {
loaded_app_fonts.insert(requested_path);
QFontDatabase::addApplicationFont(requested_path);
}
} }
Ok(())
}
fn default_font_size(&self) -> LogicalLength {
let default_font_size = cpp!(unsafe[] -> i32 as "int" {
return QFontInfo(qApp->font()).pixelSize();
});
// Ideally this would return the value from another property with a binding that's updated
// as a FontChange event is received. This is relevant for the case of using the Qt backend
// with a non-native style.
LogicalLength::new(default_font_size as f32)
}
fn free_graphics_resources(
&self,
component: ComponentRef,
_items: &mut dyn Iterator<Item = Pin<i_slint_core::items::ItemRef<'_>>>,
) -> Result<(), i_slint_core::platform::PlatformError> {
// Invalidate caches:
self.cache.component_destroyed(component);
Ok(())
}
fn set_window_adapter(&self, _window_adapter: &Rc<dyn WindowAdapter>) {
// No-op because QtWindow is also the WindowAdapter
}
}
fn accessible_item(item: Option<ItemRc>) -> Option<ItemRc> {
let mut current = item;
while let Some(c) = current {
if c.is_accessible() {
return Some(c);
} else {
current = c.parent_item();
}
}
None
}
fn get_font(request: FontRequest) -> QFont {
let family: qttypes::QString = request.family.unwrap_or_default().as_str().into();
let pixel_size: f32 = request.pixel_size.map_or(0., |logical_size| logical_size.get());
let weight: i32 = request.weight.unwrap_or(0);
let letter_spacing: f32 =
request.letter_spacing.map_or(0., |logical_spacing| logical_spacing.get());
let italic: bool = request.italic;
cpp!(unsafe [family as "QString", pixel_size as "float", weight as "int", letter_spacing as "float", italic as "bool"] -> QFont as "QFont" {
QFont f;
if (!family.isEmpty())
f.setFamily(family);
if (pixel_size > 0)
f.setPixelSize(pixel_size);
if (weight > 0) {
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
f.setWeight(qMin((weight-100)/8, 99));
#else
f.setWeight(QFont::Weight(weight));
#endif
}
f.setLetterSpacing(QFont::AbsoluteSpacing, letter_spacing);
f.setItalic(italic);
// Mark all font properties as resolved, to avoid inheriting font properties
// from the widget hierarchy. Later we call QPainter::setFont, which would
// merge in unset properties (such as bold, etc.) that it retrieved from
// the widget the painter is associated with.
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
f.resolve(QFont::AllPropertiesResolved);
#else
f.setResolveMask(QFont::AllPropertiesResolved);
#endif
return f;
})
}
cpp_class! {pub unsafe struct QFont as "QFont"}
impl QFont {
fn text_size(&self, text: &str, max_width: Option<f32>) -> LogicalSize {
let string = qttypes::QString::from(text);
let mut r = qttypes::QRectF::default();
if let Some(max) = max_width {
r.height = f32::MAX as _;
r.width = max as _;
}
let size = cpp! { unsafe [self as "const QFont*", string as "QString", r as "QRectF"]
-> qttypes::QSizeF as "QSizeF"{
return QFontMetricsF(*self).boundingRect(r, r.isEmpty() ? 0 : Qt::TextWordWrap , string).size();
}};
LogicalSize::new(size.width as _, size.height as _)
}
}
thread_local! {
// FIXME: currently the window are never removed
static ALL_WINDOWS: RefCell<Vec<Weak<QtWindow>>> = Default::default();
}
/// Called by C++'s TimerHandler::timerEvent, or every time a timer might have been started
pub(crate) fn timer_event() {
i_slint_core::platform::update_timers_and_animations();
let timeout = i_slint_core::timers::TimerList::next_timeout().map(|instant| {
let now = std::time::Instant::now();
let instant: std::time::Instant = instant.into();
if instant > now {
instant.duration_since(now).as_millis() as i32
} else {
0
}
});
if let Some(timeout) = timeout {
cpp! { unsafe [timeout as "int"] {
ensure_initialized(true);
TimerHandler::instance().timer.start(timeout, &TimerHandler::instance());
}}
}
}
mod key_codes {
macro_rules! define_qt_key_to_string_fn {
($($char:literal # $name:ident # $($qt:ident)|* # $($winit:ident)|* ;)*) => {
use crate::key_generated;
pub fn qt_key_to_string(key: key_generated::Qt_Key) -> Option<i_slint_core::SharedString> {
let char = match(key) {
$($(key_generated::$qt => $char,)*)*
_ => return None,
};
Some(char.into())
}
};
}
i_slint_common::for_each_special_keys!(define_qt_key_to_string_fn);
}
fn qt_key_to_string(key: key_generated::Qt_Key, event_text: String) -> SharedString {
// First try to see if we received one of the non-ascii keys that we have
// a special representation for. If that fails, try to use the provided
// text. If that's empty, then try to see if the provided key has an ascii
// representation. The last step is needed because modifiers may result in
// the text to be empty otherwise, for example Ctrl+C.
if let Some(special_key_code) = key_codes::qt_key_to_string(key) {
return special_key_code;
};
// On Windows, X11 and Wayland, Ctrl+C for example sends a terminal control character,
// which we choose not to supply to the application. Instead we fall through to translating
// the supplied key code.
if !event_text.is_empty() && !event_text.chars().any(|ch| ch.is_control()) {
return event_text.into();
}
match key {
key_generated::Qt_Key_Key_Space => " ",
key_generated::Qt_Key_Key_Exclam => "!",
key_generated::Qt_Key_Key_QuoteDbl => "\"",
key_generated::Qt_Key_Key_NumberSign => "#",
key_generated::Qt_Key_Key_Dollar => "$",
key_generated::Qt_Key_Key_Percent => "%",
key_generated::Qt_Key_Key_Ampersand => "&",
key_generated::Qt_Key_Key_Apostrophe => "'",
key_generated::Qt_Key_Key_ParenLeft => "(",
key_generated::Qt_Key_Key_ParenRight => ")",
key_generated::Qt_Key_Key_Asterisk => "*",
key_generated::Qt_Key_Key_Plus => "+",
key_generated::Qt_Key_Key_Comma => ",",
key_generated::Qt_Key_Key_Minus => "-",
key_generated::Qt_Key_Key_Period => ".",
key_generated::Qt_Key_Key_Slash => "/",
key_generated::Qt_Key_Key_0 => "0",
key_generated::Qt_Key_Key_1 => "1",
key_generated::Qt_Key_Key_2 => "2",
key_generated::Qt_Key_Key_3 => "3",
key_generated::Qt_Key_Key_4 => "4",
key_generated::Qt_Key_Key_5 => "5",
key_generated::Qt_Key_Key_6 => "6",
key_generated::Qt_Key_Key_7 => "7",
key_generated::Qt_Key_Key_8 => "8",
key_generated::Qt_Key_Key_9 => "9",
key_generated::Qt_Key_Key_Colon => ":",
key_generated::Qt_Key_Key_Semicolon => ";",
key_generated::Qt_Key_Key_Less => "<",
key_generated::Qt_Key_Key_Equal => "=",
key_generated::Qt_Key_Key_Greater => ">",
key_generated::Qt_Key_Key_Question => "?",
key_generated::Qt_Key_Key_At => "@",
key_generated::Qt_Key_Key_A => "a",
key_generated::Qt_Key_Key_B => "b",
key_generated::Qt_Key_Key_C => "c",
key_generated::Qt_Key_Key_D => "d",
key_generated::Qt_Key_Key_E => "e",
key_generated::Qt_Key_Key_F => "f",
key_generated::Qt_Key_Key_G => "g",
key_generated::Qt_Key_Key_H => "h",
key_generated::Qt_Key_Key_I => "i",
key_generated::Qt_Key_Key_J => "j",
key_generated::Qt_Key_Key_K => "k",
key_generated::Qt_Key_Key_L => "l",
key_generated::Qt_Key_Key_M => "m",
key_generated::Qt_Key_Key_N => "n",
key_generated::Qt_Key_Key_O => "o",
key_generated::Qt_Key_Key_P => "p",
key_generated::Qt_Key_Key_Q => "q",
key_generated::Qt_Key_Key_R => "r",
key_generated::Qt_Key_Key_S => "s",
key_generated::Qt_Key_Key_T => "t",
key_generated::Qt_Key_Key_U => "u",
key_generated::Qt_Key_Key_V => "v",
key_generated::Qt_Key_Key_W => "w",
key_generated::Qt_Key_Key_X => "x",
key_generated::Qt_Key_Key_Y => "y",
key_generated::Qt_Key_Key_Z => "z",
key_generated::Qt_Key_Key_BracketLeft => "[",
key_generated::Qt_Key_Key_Backslash => "\\",
key_generated::Qt_Key_Key_BracketRight => "]",
key_generated::Qt_Key_Key_AsciiCircum => "^",
key_generated::Qt_Key_Key_Underscore => "_",
key_generated::Qt_Key_Key_QuoteLeft => "`",
key_generated::Qt_Key_Key_BraceLeft => "{",
key_generated::Qt_Key_Key_Bar => "|",
key_generated::Qt_Key_Key_BraceRight => "}",
key_generated::Qt_Key_Key_AsciiTilde => "~",
_ => "",
}
.into()
}
pub(crate) mod ffi {
use std::ffi::c_void;
use super::QtWindow;
#[no_mangle]
pub extern "C" fn slint_qt_get_widget(
window_adapter: &i_slint_core::window::WindowAdapterRc,
) -> *mut c_void {
window_adapter
.internal(i_slint_core::InternalToken)
.and_then(|wa| <dyn std::any::Any>::downcast_ref(wa.as_any()))
.map_or(std::ptr::null_mut(), |win: &QtWindow| {
win.widget_ptr().cast::<c_void>().as_ptr()
})
}
}
fn utf8_byte_offset_to_utf16_units(str: &str, byte_offset: usize) -> usize {
let mut current_offset = 0;
let mut utf16_units = 0;
for ch in str.chars() {
if current_offset >= byte_offset {
break;
}
current_offset += ch.len_utf8();
utf16_units += ch.len_utf16();
}
utf16_units
}
#[test]
fn test_utf8_byte_offset_to_utf16_units() {
assert_eq!(utf8_byte_offset_to_utf16_units("Hello", 2), 2);
{
let test_str = "a🚀🍌";
assert_eq!(test_str.encode_utf16().count(), 5);
let banana_offset = test_str.char_indices().nth(2).unwrap().0;
assert_eq!(
utf8_byte_offset_to_utf16_units(test_str, banana_offset),
// 'a' encodes as one utf-16 unit, the rocket ship requires two units
3
);
}
}
fn qt_password_character() -> char {
char::from_u32(cpp! { unsafe [] -> i32 as "int" {
return qApp->style()->styleHint(QStyle::SH_LineEdit_PasswordCharacter, nullptr, nullptr);
}} as u32)
.unwrap_or('●')
}
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