Only show tooltips if mouse is still.

CHANGELOG.md

@@ -11,12 +11,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Added ⭐
 
-* Add `egui::plot::Plot` to plot some 2D data
+* Add `egui::plot::Plot` to plot some 2D data.
 * Add `Ui::hyperlink_to(label, url)`.
 
 ### Changed 🔧
 
 * Improve the positioning of tooltips.
+* Only show tooltips if mouse is still.
 
 
 ## 0.9.0 - 2021-02-07 - Light Mode and much more

egui/src/response.rs

@@ -190,9 +190,7 @@ impl Response {
     /// Show this UI if the item was hovered (i.e. a tooltip).
     /// If you call this multiple times the tooltips will stack underneath the previous ones.
     pub fn on_hover_ui(self, add_contents: impl FnOnce(&mut Ui)) -> Self {
-        if (self.hovered() && self.ctx.input().pointer.tooltip_pos().is_some())
-            || self.ctx.memory().everything_is_visible()
-        {
+        if self.should_show_hover_ui() {
             crate::containers::show_tooltip_under(
                 &self.ctx,
                 self.id.with("__tooltip"),
@@ -203,6 +201,28 @@ impl Response {
         self
     }
 
+    fn should_show_hover_ui(&self) -> bool {
+        if self.ctx.memory().everything_is_visible() {
+            true
+        } else if self.hovered && self.ctx.input().pointer.has_pointer() {
+            let show_tooltips_only_when_still =
+                self.ctx.style().interaction.show_tooltips_only_when_still;
+            if show_tooltips_only_when_still {
+                if self.ctx.input().pointer.is_still() {
+                    true
+                } else {
+                    // wait for mouse to stop
+                    self.ctx.request_repaint();
+                    false
+                }
+            } else {
+                true
+            }
+        } else {
+            false
+        }
+    }
+
     /// Show this text if the item was hovered (i.e. a tooltip).
     /// If you call this multiple times the tooltips will stack underneath the previous ones.
     pub fn on_hover_text(self, text: impl Into<String>) -> Self {

egui/src/style.rs

@@ -110,6 +110,9 @@ pub struct Interaction {
 
     /// Mouse must be the close to the corner of a window to resize
     pub resize_grab_radius_corner: f32,
+
+    /// If `false`, tooltips will show up anytime you hover anything, even is mouse is still moving
+    pub show_tooltips_only_when_still: bool,
 }
 
 #[derive(Clone, Debug, PartialEq)]
@@ -303,6 +306,7 @@ impl Default for Interaction {
         Self {
             resize_grab_radius_side: 5.0,
             resize_grab_radius_corner: 10.0,
+            show_tooltips_only_when_still: true,
         }
     }
 }
@@ -516,11 +520,16 @@ impl Interaction {
         let Self {
             resize_grab_radius_side,
             resize_grab_radius_corner,
+            show_tooltips_only_when_still,
         } = self;
         ui.add(Slider::f32(resize_grab_radius_side, 0.0..=20.0).text("resize_grab_radius_side"));
         ui.add(
             Slider::f32(resize_grab_radius_corner, 0.0..=20.0).text("resize_grab_radius_corner"),
         );
+        ui.checkbox(
+            show_tooltips_only_when_still,
+            "Only show tooltips if mouse is still",
+        );
 
         ui.vertical_centered(|ui| reset_button(ui, self));
     }