slint/docs/widgets.md
Jared Moulton 63fd204dda Update the Flickable and ScrollView docs...
...to include mention that the default is for the viewport dimensions to
be calculated automatically and add properties and and an example to the
Flickable docs
2021-12-06 11:59:09 +01:00

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Markdown

# Widgets
Widgets are not imported by default, and need to be imported from `"sixtyfps_widgets.60"`
Their appearance can change depending on the style
## `Button`
### Properties
* **`text`** (*string*): The text written in the button.
* **`icon`** (*image*): The image to show in the button. Note that not all styles support drawing icons.
* **`pressed`**: (*bool*): Set to true when the button is pressed.
* **`enabled`**: (*bool*): Defaults to true. When false, the button cannot be pressed
### Callbacks
* **`clicked`**
### Example
```60
import { Button } from "sixtyfps_widgets.60";
Example := Window {
Button {
width: parent.width;
height: parent.height;
text: "Click Me";
clicked => { self.text = "Clicked"; }
}
}
```
## `StandardButton`
The StandardButton looks like a button, but instead of customizing with `text` and `icon`,
it can used one of the pre-defined `kind` and the text and icon will depend on the style.
### Properties
* **`kind`** (*enum*): The kind of button, one of
`ok` `cancel`, `apply`, `close`, `reset`, `help`, `yes`, `no,` `abort`, `retry` or `ignore`
* **`enabled`**: (*bool*): Defaults to true. When false, the button cannot be pressed
### Callbacks
* **`clicked`**
### Example
```60
import { StandardButton, VerticalBox } from "sixtyfps_widgets.60";
Example := Window {
VerticalBox {
StandardButton { kind: ok; }
StandardButton { kind: apply; }
StandardButton { kind: cancel; }
}
}
```
## `CheckBox`
### Properties
* **`text`** (*string*): The text written next to the checkbox.
* **`checked`**: (*bool*): Whether the checkbox is checked or not.
### Callbacks
* **`toggled`**: The checkbox value changed
### Example
```60
import { CheckBox } from "sixtyfps_widgets.60";
Example := Window {
width: 200px;
height: 25px;
CheckBox {
width: parent.width;
height: parent.height;
text: "Hello World";
}
}
```
## `SpinBox`
### Properties
* **`value`** (*int*): The value.
* **`minimum`** (*int*): The minimum value (default: 0).
* **`maximum`** (*int*): The maximum value (default: 100).
### Example
```60
import { SpinBox } from "sixtyfps_widgets.60";
Example := Window {
width: 200px;
height: 25px;
SpinBox {
width: parent.width;
height: parent.height;
value: 42;
}
}
```
## `Slider`
### Properties
* **`value`** (*float*): The value.
* **`minimum`** (*float*): The minimum value (default: 0)
* **`maximum`** (*float*): The maximum value (default: 100)
### Callbacks
* **`changed(float)`**: The value was changed
### Example
```60
import { Slider } from "sixtyfps_widgets.60";
Example := Window {
width: 200px;
height: 25px;
Slider {
width: parent.width;
height: parent.height;
value: 42;
}
}
```
## `GroupBox`
### Properties
* **`title`** (*string*): A text written as the title of the group box.
### Example
```60
import { GroupBox } from "sixtyfps_widgets.60";
Example := Window {
width: 200px;
height: 100px;
GroupBox {
title: "A Nice Title";
Text {
text: "Hello World";
color: blue;
}
}
}
```
## `LineEdit`
A widget used to enter a single line of text
### Properties
* **`text`** (*string*): The text being edited
* **`has-focus`**: (*bool*): Set to true when the line edit currently has the focus
* **`placeholder-text`**: (*string*): A placeholder text being shown when there is no text in the edit field
* **`enabled`**: (*bool*): Defaults to true. When false, nothing can be entered
### Callbacks
* **`accepted`**: Enter was pressed
* **`edited`**: Emitted when the text has changed because the user modified it
### Example
```60
import { LineEdit } from "sixtyfps_widgets.60";
Example := Window {
width: 200px;
height: 25px;
LineEdit {
width: parent.width;
height: parent.height;
placeholder-text: "Enter text here";
}
}
```
## `TextEdit`
Similar to LineEdit, but can be used to enter several lines of text
*Note:* The current implementation only implement very few basic shortcut. More
shortcut will be implemented in a future version: <https://github.com/sixtyfpsui/sixtyfps/issues/474>
### Properties
* **`text`** (*string*): The text being edited
* **`has-focus`**: (*bool*): Set to true when the widget currently has the focus
* **`enabled`**: (*bool*): Defaults to true. When false, nothing can be entered
* **`wrap`** (*enum [`TextWrap`](builtin_elements.md#textwrap)*): The way the text wraps (default: word-wrap).
### Callbacks
* **`edited`**: Emitted when the text has changed because the user modified it
### Example
```60
import { TextEdit } from "sixtyfps_widgets.60";
Example := Window {
width: 200px;
height: 200px;
TextEdit {
width: parent.width;
height: parent.height;
text: "Lorem ipsum dolor sit amet\n, consectetur adipisici elit";
}
}
```
## `ScrollView`
A Scrollview contains a viewport that is bigger than the view and can be
scrolled. It has scrollbar to interact with. The viewport-width and
viewport-height are calculated automatically to create a scollable view
except for when using a for loop to populate the elements. In that case
the viewport-width and viewport-height are not calculated automatically
and must be set manually for scrolling to work. The ability to
automatically calculate the viewport-width and viewport-height when
using for loops may be added in the future and is tracked in issue #407.
### Properties
* **`viewport-width`** and **`viewport-height`** (*length*): The `width` and `length` properties of the viewport
* **`viewport-x`** and **`viewport-y`** (*length*): The `x` and `y` properties of the viewport. Usually these are negative
* **`visible-width`** and **`visible-height`** (*length*): The size of the visible area of the ScrollView (not including the scrollbar)
* **`enabled`** and **`has-focus`** (bool): property that are only used to render the frame as disabled or focused, but do not
change the behavior of the widget.
### Example
```60
import { ScrollView } from "sixtyfps_widgets.60";
Example := Window {
width: 200px;
height: 200px;
ScrollView {
width: 200px;
height: 200px;
viewport-width: 300px;
viewport-height: 300px;
Rectangle { width: 30px; height: 30px; x: 275px; y: 50px; background: blue; }
Rectangle { width: 30px; height: 30px; x: 175px; y: 130px; background: red; }
Rectangle { width: 30px; height: 30px; x: 25px; y: 210px; background: yellow; }
Rectangle { width: 30px; height: 30px; x: 98px; y: 55px; background: orange; }
}
}
```
## `ListView`
A ListView is like a Scrollview but it should have a `for` element, and the content are
automatically layed out in a list.
Elements are only instantiated if they are visible
### Properties
Same as ScrollView
### Example
```60
import { ListView } from "sixtyfps_widgets.60";
Example := Window {
width: 150px;
height: 150px;
ListView {
width: 150px;
height: 150px;
for data in [
{ text: "Blue", color: #0000ff, bg: #eeeeee},
{ text: "Red", color: #ff0000, bg: #eeeeee},
{ text: "Green", color: #00ff00, bg: #eeeeee},
{ text: "Yellow", color: #ffff00, bg: #222222 },
{ text: "Black", color: #000000, bg: #eeeeee },
{ text: "White", color: #ffffff, bg: #222222 },
{ text: "Magenta", color: #ff00ff, bg: #eeeeee },
{ text: "Cyan", color: #00ffff, bg: #222222 },
] : Rectangle {
height: 30px;
background: data.bg;
width: parent.width;
Text {
text: data.text;
color: data.color;
}
}
}
}
```
## `StandardListView`
Like ListView, but with a default delegate, and a `model` property which is a model of type
`StandardListViewItem`
The `StandardListViewItem` is equivalent to `{ text: string }` but will be improved in the future with `icon`, `checked` and so on (TODO)
### Properties
Same as ListView, and in addition:
* **`model`** (*`[StandardListViewItem]`*): The model
* **`current-item`** (*int*): The index of the currently active item. -1 mean none is selected, which is the default
### Example
```60
import { StandardListView } from "sixtyfps_widgets.60";
Example := Window {
width: 150px;
height: 150px;
StandardListView {
width: 150px;
height: 150px;
model: [ { text: "Blue"}, { text: "Red" }, { text: "Green" },
{ text: "Yellow" }, { text: "Black"}, { text: "White"},
{ text: "Magenta" }, { text: "Cyan" },
];
}
}
```
## `ComboBox`
A button that, when clicked, opens a popup to select a value.
### Properties
* **`model`** (*\[string\]*): The list of possible values
* **`current-index`**: (*int*): The index of the selected value (-1 if no value is selected)
* **`current-value`**: (*string*): The currently selected text
* **`enabled`**: (*bool*): When false, the combobox cannot be opened (default: true)
### Callbacks
* **`selected(string)`**: A value was selected from the combo box. The argument is the currently selected value.
### Example
```60
import { ComboBox } from "sixtyfps_widgets.60";
Example := Window {
width: 200px;
height: 25px;
ComboBox {
width: preferred-width;
height: preferred-height;
model: ["first", "second", "third"];
current-value: "first";
}
}
```
## `TabWidget`
TabWidget is a container for a set of tabs. It can only have `Tab` elements as children and only one tab will be visible at
a time.
### Properties
* **`current-index`** (*int*): The index of the currently visible tab
### Properties of the `Tab` element
* **`title`** (*string*): The text written in the tab bar.
### Example
```60
import { TabWidget } from "sixtyfps_widgets.60";
Example := Window {
width: 200px;
height: 200px;
TabWidget {
Tab {
title: "First";
Rectangle { background: orange; }
}
Tab {
title: "Second";
Rectangle { background: pink; }
}
}
}
```
## `HorizontalBox`, `VerticalBox`, `GridBox`
That's the same as `HorizontalLayout`, `VerticalLayout` or `GridLayout` but the spacing and padding values
depending on the style instead of defaulting to 0.
## `AboutSixtyFPS`
This element displays the a "Made with SixtyFPS" badge.
```60
import { AboutSixtyFPS } from "sixtyfps_widgets.60";
Example := Window {
width: 128px;
height: 128px;
AboutSixtyFPS {
}
}
```