Add Zoom Factor to options panel (#7517)

crates/egui/src/data/output.rs

@@ -294,10 +294,11 @@ pub enum UserAttentionType {
 /// egui emits a [`CursorIcon`] in [`PlatformOutput`] each frame as a request to the integration.
 ///
 /// Loosely based on <https://developer.mozilla.org/en-US/docs/Web/CSS/cursor>.
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
 pub enum CursorIcon {
     /// Normal cursor icon, whatever that is.
+    #[default]
     Default,
 
     /// Show no cursor
@@ -457,12 +458,6 @@ impl CursorIcon {
     ];
 }
 
-impl Default for CursorIcon {
-    fn default() -> Self {
-        Self::Default
-    }
-}
-
 /// Things that happened during this frame that the integration may be interested in.
 ///
 /// In particular, these events may be useful for accessibility, i.e. for screen readers.

crates/egui/src/memory/mod.rs

@@ -357,7 +357,7 @@ impl Options {
             theme_preference,
             fallback_theme: _,
             system_theme: _,
-            zoom_factor: _, // TODO(emilk)
+            zoom_factor,
             zoom_with_keyboard,
             tessellation_options,
             repaint_on_widget_change,
@@ -384,6 +384,11 @@ impl Options {
                     "Repaint if any widget moves or changes id",
                 );
 
+                ui.horizontal(|ui| {
+                    ui.label("Zoom factor:");
+                    ui.add(crate::DragValue::new(zoom_factor).range(0.10..=10.0));
+                });
+
                 ui.checkbox(
                     zoom_with_keyboard,
                     "Zoom with keyboard (Cmd +, Cmd -, Cmd 0)",