Fix broken drawer textures after scale change

This fixes an issue with the arrow at the bottom of the drawer, where it
would turn into a solid black rectangle after the scale is changed.

This is due to the renderer being resized, invalidating the subtexture
and thus requiring a redraw. To fix this we now redraw the arrow
whenever the scale or size of the window has changed.

Closes #30.

src/drawer.rs

@@ -242,7 +242,7 @@ impl Drawer {
 
     /// Check if the panel owns this surface.
     pub fn owns_surface(&self, surface: &WlSurface) -> bool {
-        self.window.as_ref().map_or(false, |window| window.wl_surface() == surface)
+        self.window.as_ref().is_some_and(|window| window.wl_surface() == surface)
     }
 
     /// Update the DPI scale factor.
@@ -387,6 +387,8 @@ impl Drawer {
         // Resize if the surface exists already.
         if self.renderer.has_surface() {
             let _ = self.renderer.resize(size, self.scale_factor);
+            self.closing_icon = None;
+            self.opening_icon = None;
             return;
         }
 

src/main.rs

@@ -468,7 +468,7 @@ impl TouchHandler for State {
 
             // Handle short taps.
             if !drawer.offsetting {
-                if last_tap.map_or(false, |tap| tap.elapsed() <= MAX_DOUBLE_TAP_DURATION) {
+                if last_tap.is_some_and(|tap| tap.elapsed() <= MAX_DOUBLE_TAP_DURATION) {
                     // Remove delayed single-tap callback.
                     if let Some(source) = self.tap_timeout.take() {
                         self.event_loop.remove(source);
@@ -488,7 +488,7 @@ impl TouchHandler for State {
                         TimeoutAction::Drop
                     });
                     self.tap_timeout = source.ok();
-                } else if self.panel_height.map_or(false, |panel_height| {
+                } else if self.panel_height.is_some_and(|panel_height| {
                     self.touch_start.1 >= panel_height as f64 - HANDLE_HEIGHT as f64
                 }) {
                     // Immediately close drawer, since handle has no double-tap.