moving: Add stacking indicator

src/shell/element/stack_hover.rs

@@ -0,0 +1,74 @@
+use crate::{
+    fl,
+    utils::iced::{IcedElement, Program},
+};
+
+use apply::Apply;
+use calloop::LoopHandle;
+use cosmic::{
+    iced::widget::{container, row},
+    iced_core::{Background, Color, Length},
+    theme,
+    widget::{icon, text},
+};
+use smithay::utils::{Logical, Size};
+
+pub type StackHover = IcedElement<StackHoverInternal>;
+
+pub fn stack_hover(
+    evlh: LoopHandle<'static, crate::state::Data>,
+    size: Size<i32, Logical>,
+) -> StackHover {
+    StackHover::new(StackHoverInternal, size, evlh)
+}
+
+pub struct StackHoverInternal;
+
+impl Program for StackHoverInternal {
+    type Message = ();
+
+    fn view(&self) -> crate::utils::iced::Element<'_, Self::Message> {
+        row(vec![
+            icon("window-stack-symbolic", 24)
+                .force_svg(true)
+                .style(theme::Svg::Symbolic)
+                .apply(container)
+                .padding(8)
+                .width(Length::Shrink)
+                .apply(container)
+                .center_y()
+                .height(Length::Fill)
+                .into(),
+            text(fl!("stack-windows"))
+                .font(cosmic::font::FONT)
+                .size(24)
+                .line_height(24.)
+                .apply(container)
+                .padding(8)
+                .width(Length::Shrink)
+                .apply(container)
+                .center_y()
+                .height(Length::Fill)
+                .into(),
+        ])
+        .width(Length::Shrink)
+        .height(Length::Shrink)
+        .apply(container)
+        .padding(4)
+        .style(theme::Container::custom(|theme| container::Appearance {
+            text_color: Some(Color::from(theme.cosmic().palette.neutral_9)),
+            background: Some(Background::Color(theme.cosmic().palette.neutral_3.into())),
+            border_radius: 24.0.into(),
+            border_width: 0.0,
+            border_color: Color::TRANSPARENT,
+        }))
+        .width(Length::Shrink)
+        .height(Length::Fixed(48.))
+        .apply(container)
+        .center_x()
+        .center_y()
+        .width(Length::Fill)
+        .height(Length::Fill)
+        .into()
+    }
+}