Toolbar: Pro themes draw tool glyphs at two thirds of the button (#2665) (#2932)

The Pro toolbar drew each tool glyph at 16 px in a 30 px button (the
generic icon-button proportion), which reads small and thin next to
Photoshop's toolbar. Pro themes now draw tool glyphs at 20 px; the other
themes keep the icon-button size.


Claude-Session: https://claude.ai/code/session_01CVtZHu998NDhf4Z8QvS5pd

Co-authored-by: ngrafton2006 <ngrafton2006@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>

crates/ui-egui/src/panels.rs

@@ -148,7 +148,7 @@ pub fn toolbar(app: &mut PhotocraftApp, ui: &mut egui::Ui) {
                                     let sel = slot.contains(&app.ui.tool);
                                     let tip =
                                         if tool.key() == '\0' { tl!(tool.label()).to_string() } else { format!("{}  ({})", tl!(tool.label()), tool.key()) };
-                                    let resp = icons::button(ui, icons::tool_icon(tool), bx, sel, &tip);
+                                    let resp = icons::button_with_icon_size(ui, icons::tool_icon(tool), bx, toolbar_icon_size(bx, t.pro), sel, &tip);
                                     if slot.len() > 1 {
                                         paint_toolbar_flyout_indicator(ui, &t, &resp);
                                     }
@@ -309,6 +309,12 @@ pub fn toolbar(app: &mut PhotocraftApp, ui: &mut egui::Ui) {
     );
 }
 
+/// Glyph size of a toolbar tool button. Pro fills two thirds of the button, close to Photoshop's
+/// toolbar glyphs (#2665); the other themes keep the general icon-button proportion.
+fn toolbar_icon_size(box_size: f32, pro: bool) -> f32 {
+    (box_size * if pro { 2.0 / 3.0 } else { 0.52 }).round()
+}
+
 /// Paints a triangle on the bottom right corner of an icon button to indicate that a toolbar item has a submenu.
 pub fn paint_toolbar_flyout_indicator(ui: &mut egui::Ui, tokens: &Tokens, resp: &egui::Response) {
     let r = resp.rect;
@@ -4268,6 +4274,15 @@ mod type_flyout_tests {
         assert_eq!(*hand, [Tool::Hand, Tool::RotateView]);
         assert_eq!(Tool::RotateView.key(), 'R');
     }
+
+    #[test]
+    fn pro_toolbar_glyphs_fill_two_thirds_of_the_button() {
+        // #2665: Photoshop-style themes draw tool glyphs larger than other icon buttons.
+        assert_eq!(toolbar_icon_size(30.0, true), 20.0);
+        assert_eq!(toolbar_icon_size(36.0, false), (36.0f32 * 0.52).round(), "other themes keep the icon-button size");
+        // The glyph stays inside the button with room for the flyout triangle's corner.
+        assert!(toolbar_icon_size(30.0, true) <= 30.0 - 2.0 * 4.0);
+    }
 }
 
 #[cfg(test)]