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Passthrough widget implementation with treating as child

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This commit is contained in:
Ian Douglas Scott 2023-12-15 13:39:02 -08:00
parent c4adca76c0
commit d56a591a9f
1 changed files with 41 additions and 92 deletions
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133
src/widgets/image_bg.rs
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@ -1,3 +1,5 @@
// Renders image behind widget, and otherwise passes through all behavior
use cosmic::iced::{
self,
advanced::{
@ -34,86 +36,51 @@ impl<'a, Msg> Widget<Msg, cosmic::Renderer> for ImageBg<'a, Msg> {
fn children(&self) -> Vec<Tree>;
fn width(&self) -> Length;
fn height(&self) -> Length;
fn layout(
&self,
tree: &mut Tree,
renderer: &cosmic::Renderer,
limits: &layout::Limits,
) -> layout::Node;
fn operate(
&self,
tree: &mut Tree,
layout: Layout<'_>,
renderer: &cosmic::Renderer,
operation: &mut dyn Operation<OperationOutputWrapper<Msg>>,
);
fn mouse_interaction(
&self,
tree: &Tree,
layout: Layout<'_>,
cursor: mouse::Cursor,
viewport: &Rectangle,
renderer: &cosmic::Renderer,
) -> mouse::Interaction;
}
to self.content.as_widget_mut() {
fn diff(&mut self, tree: &mut Tree);
fn on_event(
&mut self,
tree: &mut Tree,
event: Event,
layout: Layout<'_>,
cursor: mouse::Cursor,
renderer: &cosmic::Renderer,
clipboard: &mut dyn Clipboard,
shell: &mut Shell<'_, Msg>,
viewport: &Rectangle,
) -> event::Status;
fn overlay<'b>(
&'b mut self,
tree: &'b mut Tree,
layout: Layout<'_>,
renderer: &cosmic::Renderer,
) -> Option<overlay::Element<'b, Msg, cosmic::Renderer>>;
}
}
fn layout(
&self,
tree: &mut Tree,
renderer: &cosmic::Renderer,
limits: &layout::Limits,
) -> layout::Node {
let content = self.content.as_widget().layout(tree, renderer, limits);
//let size = limits.resolve(content.size());
let size = content.size();
layout::Node::with_children(size, vec![content])
}
fn operate(
&self,
tree: &mut Tree,
layout: Layout<'_>,
renderer: &cosmic::Renderer,
operation: &mut dyn Operation<OperationOutputWrapper<Msg>>,
) {
operation.container(
None, // XXX id
layout.bounds(),
&mut |operation| {
self.content.as_widget().operate(
tree,
layout.children().next().unwrap(),
renderer,
operation,
);
},
);
}
fn on_event(
&mut self,
tree: &mut Tree,
event: Event,
layout: Layout<'_>,
cursor: mouse::Cursor,
renderer: &cosmic::Renderer,
clipboard: &mut dyn Clipboard,
shell: &mut Shell<'_, Msg>,
viewport: &Rectangle,
) -> event::Status {
self.content.as_widget_mut().on_event(
tree,
event,
layout.children().next().unwrap(),
cursor,
renderer,
clipboard,
shell,
viewport,
)
}
fn mouse_interaction(
&self,
tree: &Tree,
layout: Layout<'_>,
cursor: mouse::Cursor,
viewport: &Rectangle,
renderer: &cosmic::Renderer,
) -> mouse::Interaction {
self.content.as_widget().mouse_interaction(
tree,
layout.children().next().unwrap(),
cursor,
viewport,
renderer,
)
}
fn draw(
&self,
state: &Tree,
@ -157,26 +124,8 @@ impl<'a, Msg> Widget<Msg, cosmic::Renderer> for ImageBg<'a, Msg> {
);
//});
self.content.draw(
state,
renderer,
theme,
style,
layout.children().next().unwrap(),
cursor,
viewport,
)
}
fn overlay<'b>(
&'b mut self,
tree: &'b mut Tree,
layout: Layout<'_>,
renderer: &cosmic::Renderer,
) -> Option<overlay::Element<'b, Msg, cosmic::Renderer>> {
self.content
.as_widget_mut()
.overlay(tree, layout.children().next().unwrap(), renderer)
.draw(state, renderer, theme, style, layout, cursor, viewport)
}
}