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Testing: Change ElementReference to be weak

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We don't want testing variables to affect the life-cycle of elements in the UI.
This commit is contained in:
Simon Hausmann 2024-04-23 16:37:36 +02:00 • committed by Simon Hausmann
parent cca570549c
commit d8c1096149
5 changed files with 153 additions and 65 deletions
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116
api/cpp/include/slint-testing.h
View file

@ -22,7 +22,7 @@ inline void init()
/// Use find_by_accessible_label() to obtain all elements matching the given accessible label.
class ElementHandle
{
cbindgen_private::ItemRc inner;
cbindgen_private::ItemWeak inner;
public:
/// Find all elements matching the given accessible label.
@ -38,34 +38,39 @@ public:
SharedVector<ElementHandle> result;
cbindgen_private::slint_testing_element_find_by_accessible_label(
&vrc, &label_view,
reinterpret_cast<SharedVector<cbindgen_private::ItemRc> *>(&result));
reinterpret_cast<SharedVector<cbindgen_private::ItemWeak> *>(&result));
return result;
}
/// Returns true if the underlying element still exists; false otherwise.
bool is_valid() const { return private_api::upgrade_item_weak(inner).has_value(); }
/// Returns the accessible-label of that element, if any.
std::optional<SharedString> accessible_label() const
{
SharedString result;
if (inner.item_tree.vtable()->accessible_string_property(
inner.item_tree.borrow(), inner.index,
cbindgen_private::AccessibleStringProperty::Label, &result)) {
return result;
} else {
return std::nullopt;
if (auto item = private_api::upgrade_item_weak(inner)) {
SharedString result;
if (item->item_tree.vtable()->accessible_string_property(
item->item_tree.borrow(), item->index,
cbindgen_private::AccessibleStringProperty::Label, &result)) {
return result;
}
}
return std::nullopt;
}
/// Returns the accessible-value of that element, if any.
std::optional<SharedString> accessible_value() const
{
SharedString result;
if (inner.item_tree.vtable()->accessible_string_property(
inner.item_tree.borrow(), inner.index,
cbindgen_private::AccessibleStringProperty::Value, &result)) {
return result;
} else {
return std::nullopt;
if (auto item = private_api::upgrade_item_weak(inner)) {
SharedString result;
if (item->item_tree.vtable()->accessible_string_property(
item->item_tree.borrow(), item->index,
cbindgen_private::AccessibleStringProperty::Value, &result)) {
return result;
}
}
return std::nullopt;
}
/// Sets the accessible-value of that element.
@ -73,55 +78,68 @@ public:
/// Setting the value will invoke the `accessible-action-set-value` callback.
void set_accessible_value(SharedString value) const
{
union SetValueHelper {
cbindgen_private::AccessibilityAction action;
SetValueHelper(SharedString value)
// : action { .set_value = { cbindgen_private::AccessibilityAction::Tag::SetValue,
// std::move(value) } }
{
new (&action.set_value) cbindgen_private::AccessibilityAction::SetValue_Body {
cbindgen_private::AccessibilityAction::Tag::SetValue, std::move(value)
};
}
~SetValueHelper() { action.set_value.~SetValue_Body(); }
if (auto item = private_api::upgrade_item_weak(inner)) {
union SetValueHelper {
cbindgen_private::AccessibilityAction action;
SetValueHelper(SharedString value)
// : action { .set_value = { cbindgen_private::AccessibilityAction::Tag::SetValue,
// std::move(value) } }
{
new (&action.set_value) cbindgen_private::AccessibilityAction::SetValue_Body {
cbindgen_private::AccessibilityAction::Tag::SetValue, std::move(value)
};
}
~SetValueHelper() { action.set_value.~SetValue_Body(); }
} action(std::move(value));
inner.item_tree.vtable()->accessibility_action(inner.item_tree.borrow(), inner.index,
&action.action);
} action(std::move(value));
item->item_tree.vtable()->accessibility_action(item->item_tree.borrow(), item->index,
&action.action);
}
}
/// Invokes the default accessibility action of that element (`accessible-action-default`).
/// Invokes the default accessibility action of that element
/// (`accessible-action-default`).
void invoke_default_action() const
{
union DefaultActionHelper {
cbindgen_private::AccessibilityAction action;
DefaultActionHelper()
//: action { .tag = cbindgen_private::AccessibilityAction::Tag::Default }
{
action.tag = cbindgen_private::AccessibilityAction::Tag::Default;
}
~DefaultActionHelper() { }
if (auto item = private_api::upgrade_item_weak(inner)) {
union DefaultActionHelper {
cbindgen_private::AccessibilityAction action;
DefaultActionHelper()
//: action { .tag = cbindgen_private::AccessibilityAction::Tag::Default }
{
action.tag = cbindgen_private::AccessibilityAction::Tag::Default;
}
~DefaultActionHelper() { }
} action;
inner.item_tree.vtable()->accessibility_action(inner.item_tree.borrow(), inner.index,
&action.action);
} action;
item->item_tree.vtable()->accessibility_action(item->item_tree.borrow(), item->index,
&action.action);
}
}
/// Returns the size of this element
LogicalSize size() const
{
auto rect = inner.item_tree.vtable()->item_geometry(inner.item_tree.borrow(), inner.index);
return LogicalSize({ rect.width, rect.height });
if (auto item = private_api::upgrade_item_weak(inner)) {
auto rect =
item->item_tree.vtable()->item_geometry(item->item_tree.borrow(), item->index);
return LogicalSize({ rect.width, rect.height });
}
return LogicalSize({ 0, 0 });
}
/// Returns the absolute position of this element
LogicalPosition absolute_position() const
{
cbindgen_private::LogicalRect rect =
inner.item_tree.vtable()->item_geometry(inner.item_tree.borrow(), inner.index);
cbindgen_private::LogicalPoint abs = slint::cbindgen_private::slint_item_absolute_position(
&inner.item_tree, inner.index);
return LogicalPosition({ abs.x + rect.x, abs.y + rect.y });
if (auto item = private_api::upgrade_item_weak(inner)) {
cbindgen_private::LogicalRect rect =
item->item_tree.vtable()->item_geometry(item->item_tree.borrow(), item->index);
cbindgen_private::LogicalPoint abs =
slint::cbindgen_private::slint_item_absolute_position(&item->item_tree,
item->index);
return LogicalPosition({ abs.x + rect.x, abs.y + rect.y });
}
return LogicalPosition({ 0, 0 });
}
};

10
api/cpp/include/slint.h
View file

@ -114,6 +114,16 @@ inline vtable::Layout drop_in_place(ItemTreeRef item_tree)
# endif
#endif // !defined(DOXYGEN)
inline std::optional<cbindgen_private::ItemRc>
upgrade_item_weak(const cbindgen_private::ItemWeak &item_weak)
{
if (auto item_tree_strong = item_weak.item_tree.lock()) {
return { { *item_tree_strong, item_weak.index } };
} else {
return std::nullopt;
}
}
} // namespace private_api
template<typename T>