Merge branch 'master' into fix-progressbar-rendering

CHANGELOG.md

@@ -42,10 +42,12 @@ This means that druid no longer requires cairo on macOS and uses Core Graphics i
 - `MouseButtons` to `MouseEvent` to track which buttons are being held down during an event. ([#843] by [@xStrom])
 - `Env` and `Key` gained methods for inspecting an `Env` at runtime ([#880] by [@Zarenor])
 - `UpdateCtx::request_timer` and `UpdateCtx::request_anim_frame`. ([#898] by [@finnerale])
+- `LifeCycleCtx::request_timer`. ([#954] by [@xStrom])
 - `UpdateCtx::size` and `LifeCycleCtx::size`. ([#917] by [@jneem])
 - `WidgetExt::debug_widget_id`, for displaying widget ids on hover. ([#876] by [@cmyr])
 - `im` feature, with `Data` support for the [`im` crate](https://docs.rs/im/) collections. ([#924] by [@cmyr])
 - `im::Vector` support for the `List` widget. ([#940] by [@xStrom])
+- `LifeCycle::Size` event to inform widgets that their size changed. ([#953] by [@xStrom])
 
 ### Changed
 
@@ -95,6 +97,7 @@ This means that druid no longer requires cairo on macOS and uses Core Graphics i
 - X11: Support key and mouse button state. ([#920] by [@jneem])
 - Routing `LifeCycle::FocusChanged` to descendant widgets. ([#925] by [@yrns])
 - Built-in open and save menu items now show the correct label and submit the right commands. ([#930] by [@finnerale])
+- Wheel events now properly update hot state. ([#951] by [@xStrom])
 
 ### Visual
 
@@ -194,6 +197,9 @@ This means that druid no longer requires cairo on macOS and uses Core Graphics i
 [#942]: https://github.com/xi-editor/druid/pull/942
 [#943]: https://github.com/xi-editor/druid/pull/943
 [#949]: https://github.com/xi-editor/druid/pull/949
+[#951]: https://github.com/xi-editor/druid/pull/951
+[#953]: https://github.com/xi-editor/druid/pull/953
+[#954]: https://github.com/xi-editor/druid/pull/954
 
 ## [0.5.0] - 2020-04-01
 

druid/Cargo.toml

@@ -38,7 +38,7 @@ fnv = "1.0.3"
 instant = { version = "0.1", features = ["wasm-bindgen"] }
 
 # Optional dependencies
-im = { version = "14.0", optional = true }
+im = { version = "15.0", optional = true }
 usvg = { version = "0.9.0", optional = true }
 image = { version = "0.23.2", optional = true }
 

druid/src/app.rs

@@ -85,11 +85,15 @@ impl<T: Data> AppLauncher<T> {
     /// Initialize a minimal logger for printing logs out to stderr.
     ///
     /// Meant for use during development only.
+    ///
+    /// # Panics
+    ///
+    /// Panics if the logger fails to initialize.
     pub fn use_simple_logger(self) -> Self {
         #[cfg(not(target_arch = "wasm32"))]
-        simple_logger::init().ok();
+        simple_logger::init().expect("Failed to init simple logger");
         #[cfg(target_arch = "wasm32")]
-        console_log::init_with_level(log::Level::Trace).ok();
+        console_log::init_with_level(log::Level::Trace).expect("Failed to init simple logger");
         self
     }
 

druid/src/contexts.rs

@@ -62,6 +62,7 @@ pub struct LifeCycleCtx<'a> {
     pub(crate) command_queue: &'a mut CommandQueue,
     pub(crate) base_state: &'a mut BaseState,
     pub(crate) window_id: WindowId,
+    pub(crate) window: &'a WindowHandle,
 }
 
 /// A mutable context provided to data update methods of widgets.
@@ -91,6 +92,7 @@ pub struct LayoutCtx<'a, 'b: 'a> {
     pub(crate) base_state: &'a mut BaseState,
     pub(crate) text_factory: &'a mut Text<'b>,
     pub(crate) window_id: WindowId,
+    pub(crate) window: &'a WindowHandle,
     pub(crate) mouse_pos: Option<Point>,
 }
 
@@ -548,6 +550,17 @@ impl<'a> LifeCycleCtx<'a> {
         self.request_paint();
     }
 
+    /// Request a timer event.
+    ///
+    /// The return value is a token, which can be used to associate the
+    /// request with the event.
+    pub fn request_timer(&mut self, deadline: Duration) -> TimerToken {
+        self.base_state.request_timer = true;
+        let timer_token = self.window.request_timer(deadline);
+        self.base_state.add_timer(timer_token);
+        timer_token
+    }
+
     /// The layout size.
     ///
     /// This is the layout size as ultimately determined by the parent

druid/src/core.rs

@@ -24,7 +24,7 @@ use crate::piet::{
 use crate::{
     BoxConstraints, Color, Command, Data, Env, Event, EventCtx, InternalEvent, InternalLifeCycle,
     LayoutCtx, LifeCycle, LifeCycleCtx, PaintCtx, Region, Target, TimerToken, UpdateCtx, Widget,
-    WidgetId, WindowId,
+    WidgetId, WindowHandle, WindowId,
 };
 
 /// Our queue type
@@ -188,23 +188,53 @@ impl<T, W: Widget<T>> WidgetPod<T, W> {
         self.state.id
     }
 
-    /// Set layout rectangle.
+    /// Set the layout [`Rect`].
     ///
-    /// Intended to be called on child widget in container's `layout`
-    /// implementation.
+    /// A container widget should call the [`Widget::layout`] method on its children in
+    /// its own [`Widget::layout`] implementation, then possibly modify the returned [`Size`], and
+    /// finally call this `set_layout_rect` method on the child to set the final layout [`Rect`].
+    ///
+    /// The child will receive the [`LifeCycle::Size`] event informing them of the final [`Size`].
+    ///
+    /// [`Widget::layout`]: trait.Widget.html#tymethod.layout
+    /// [`Rect`]: struct.Rect.html
+    /// [`Size`]: struct.Size.html
+    /// [`LifeCycle::Size`]: enum.LifeCycle.html#variant.Size
     pub fn set_layout_rect(&mut self, ctx: &mut LayoutCtx, data: &T, env: &Env, layout_rect: Rect) {
+        let mut needs_merge = false;
+
+        let old_size = self.state.layout_rect.map(|r| r.size());
+        let new_size = layout_rect.size();
+
         self.state.layout_rect = Some(layout_rect);
 
+        if old_size.is_none() || old_size.unwrap() != new_size {
+            let mut child_ctx = LifeCycleCtx {
+                command_queue: ctx.command_queue,
+                base_state: &mut self.state,
+                window_id: ctx.window_id,
+                window: ctx.window,
+            };
+            let size_event = LifeCycle::Size(new_size);
+            self.inner.lifecycle(&mut child_ctx, &size_event, data, env);
+            needs_merge = true;
+        }
+
         if WidgetPod::set_hot_state(
             &mut self.inner,
             ctx.command_queue,
             &mut self.state,
             ctx.window_id,
+            ctx.window,
             layout_rect,
             ctx.mouse_pos,
             data,
             env,
         ) {
+            needs_merge = true;
+        }
+
+        if needs_merge {
             ctx.base_state.merge_up(&self.state);
         }
     }
@@ -215,9 +245,12 @@ impl<T, W: Widget<T>> WidgetPod<T, W> {
         self.layout_rect()
     }
 
-    /// The layout rectangle.
+    /// Returns the layout [`Rect`].
     ///
-    /// This will be same value as set by `set_layout_rect`.
+    /// This will be the same [`Rect`] that was set by [`set_layout_rect`].
+    ///
+    /// [`Rect`]: struct.Rect.html
+    /// [`set_layout_rect`]: #method.set_layout_rect
     pub fn layout_rect(&self) -> Rect {
         self.state.layout_rect.unwrap_or_default()
     }
@@ -303,6 +336,7 @@ impl<T, W: Widget<T>> WidgetPod<T, W> {
         command_queue: &mut CommandQueue,
         child_state: &mut BaseState,
         window_id: WindowId,
+        window: &WindowHandle,
         rect: Rect,
         mouse_pos: Option<Point>,
         data: &T,
@@ -319,6 +353,7 @@ impl<T, W: Widget<T>> WidgetPod<T, W> {
                 command_queue,
                 base_state: child_state,
                 window_id,
+                window,
             };
             child.lifecycle(&mut child_ctx, &hot_changed_event, data, env);
             // if hot changes and we're showing widget ids, always repaint
@@ -484,6 +519,7 @@ impl<T: Data, W: Widget<T>> WidgetPod<T, W> {
             command_queue: ctx.command_queue,
             base_state: &mut self.state,
             window_id: ctx.window_id,
+            window: ctx.window,
             text_factory: ctx.text_factory,
             mouse_pos: child_mouse_pos,
         };
@@ -569,6 +605,7 @@ impl<T: Data, W: Widget<T>> WidgetPod<T, W> {
                         child_ctx.command_queue,
                         child_ctx.base_state,
                         child_ctx.window_id,
+                        child_ctx.window,
                         rect,
                         None,
                         data,
@@ -616,6 +653,7 @@ impl<T: Data, W: Widget<T>> WidgetPod<T, W> {
                     child_ctx.command_queue,
                     child_ctx.base_state,
                     child_ctx.window_id,
+                    child_ctx.window,
                     rect,
                     Some(mouse_event.pos),
                     data,
@@ -632,6 +670,7 @@ impl<T: Data, W: Widget<T>> WidgetPod<T, W> {
                     child_ctx.command_queue,
                     child_ctx.base_state,
                     child_ctx.window_id,
+                    child_ctx.window,
                     rect,
                     Some(mouse_event.pos),
                     data,
@@ -648,6 +687,7 @@ impl<T: Data, W: Widget<T>> WidgetPod<T, W> {
                     child_ctx.command_queue,
                     child_ctx.base_state,
                     child_ctx.window_id,
+                    child_ctx.window,
                     rect,
                     Some(mouse_event.pos),
                     data,
@@ -658,6 +698,23 @@ impl<T: Data, W: Widget<T>> WidgetPod<T, W> {
                 mouse_event.pos -= rect.origin().to_vec2();
                 Event::MouseMove(mouse_event)
             }
+            Event::Wheel(mouse_event) => {
+                WidgetPod::set_hot_state(
+                    &mut self.inner,
+                    child_ctx.command_queue,
+                    child_ctx.base_state,
+                    child_ctx.window_id,
+                    child_ctx.window,
+                    rect,
+                    Some(mouse_event.pos),
+                    data,
+                    env,
+                );
+                recurse = had_active || child_ctx.base_state.is_hot;
+                let mut mouse_event = mouse_event.clone();
+                mouse_event.pos -= rect.origin().to_vec2();
+                Event::Wheel(mouse_event)
+            }
             Event::KeyDown(e) => {
                 recurse = child_ctx.has_focus();
                 Event::KeyDown(*e)
@@ -670,12 +727,6 @@ impl<T: Data, W: Widget<T>> WidgetPod<T, W> {
                 recurse = child_ctx.has_focus();
                 Event::Paste(e.clone())
             }
-            Event::Wheel(wheel_event) => {
-                recurse = had_active || child_ctx.base_state.is_hot;
-                let mut wheel_event = wheel_event.clone();
-                wheel_event.pos -= rect.origin().to_vec2();
-                Event::Wheel(wheel_event)
-            }
             Event::Zoom(zoom) => {
                 recurse = had_active || child_ctx.base_state.is_hot;
                 Event::Zoom(*zoom)
@@ -780,6 +831,11 @@ impl<T: Data, W: Widget<T>> WidgetPod<T, W> {
 
                 true
             }
+            LifeCycle::Size(_) => {
+                // We are a descendant of a widget that received the Size event.
+                // This event was meant only for our parent, so don't recurse.
+                false
+            }
             //NOTE: this is not sent here, but from the special set_hot_state method
             LifeCycle::HotChanged(_) => false,
             LifeCycle::FocusChanged(_) => {
@@ -793,6 +849,7 @@ impl<T: Data, W: Widget<T>> WidgetPod<T, W> {
             command_queue: ctx.command_queue,
             base_state: &mut self.state,
             window_id: ctx.window_id,
+            window: ctx.window,
         };
 
         if recurse {
@@ -959,6 +1016,7 @@ mod tests {
             command_queue: &mut command_queue,
             base_state: &mut state,
             window_id: WindowId::next(),
+            window: &WindowHandle::default(),
         };
 
         let env = Env::default();

druid/src/data.rs

@@ -381,27 +381,16 @@ impl Data for piet::Color {
     }
 }
 
-//FIXME Vector::ptr_eq is not currently reliable; this is a temporary impl?
 #[cfg(feature = "im")]
 impl<T: Data> Data for im::Vector<T> {
     fn same(&self, other: &Self) -> bool {
-        // for reasons outlined in https://github.com/bodil/im-rs/issues/129,
-        // ptr_eq always returns false for small collections. This heuristic
-        // falls back to using equality for collections below some threshold.
-        // There may be a possibility of this returning false negatives, but
-        // not false positives; that's an acceptable outcome.
-
-        /* this is the impl I expected to use
-        const INLINE_LEN: usize = 48; // bytes available before first allocation;
-        let inline_capacity: usize = INLINE_LEN / std::mem::size_of::<T>();
-        if self.len() == other.len() && self.len() <= inline_capacity {
-            self.iter().zip(other.iter()).all(|(a, b)| a.same(b))
+        // if a vec is small enough that it doesn't require an allocation
+        // it is 'inline'; in this case a pointer comparison is meaningless.
+        if self.is_inline() {
+            self.len() == other.len() && self.iter().zip(other.iter()).all(|(a, b)| a.same(b))
         } else {
             self.ptr_eq(other)
         }
-        */
-
-        self.len() == other.len() && self.iter().zip(other.iter()).all(|(a, b)| a.same(b))
     }
 }
 

druid/src/event.rs

@@ -178,6 +178,14 @@ pub enum LifeCycle {
     /// [`WidgetPod`]: struct.WidgetPod.html
     /// [`LifeCycleCtx::register_for_focus`]: struct.LifeCycleCtx.html#method.register_for_focus
     WidgetAdded,
+    /// Called when the size of the widget changes.
+    ///
+    /// The [`Size`] is derived from the [`Rect`] that was set with [`WidgetPod::set_layout_rect`].
+    ///
+    /// [`Size`]: struct.Size.html
+    /// [`Rect`]: struct.Rect.html
+    /// [`WidgetPod::set_layout_rect`]: struct.WidgetPod.html#method.set_layout_rect
+    Size(Size),
     /// Called at the beginning of a new animation frame.
     ///
     /// On the first frame when transitioning from idle to animating, `interval`