Add some helper functions to Response

egui/src/containers/popup.rs

@@ -57,7 +57,7 @@ pub fn show_tooltip_at_pointer(ctx: &CtxRef, id: Id, add_contents: impl FnOnce(&
     let suggested_pos = ctx
         .input()
         .pointer
-        .tooltip_pos()
+        .hover_pos()
         .map(|pointer_pos| pointer_pos + vec2(16.0, 16.0));
     show_tooltip_at(ctx, id, suggested_pos, add_contents)
 }

egui/src/context.rs

@@ -119,7 +119,7 @@ impl CtxRef {
             let show_error = |pos: Pos2, text: String| {
                 let painter = self.debug_painter();
                 let rect = painter.error(pos, text);
-                if let Some(pointer_pos) = self.input.pointer.tooltip_pos() {
+                if let Some(pointer_pos) = self.input.pointer.hover_pos() {
                     if rect.contains(pointer_pos) {
                         painter.error(
                             rect.left_bottom() + vec2(2.0, 4.0),

egui/src/input_state.rs

@@ -407,7 +407,7 @@ impl PointerState {
     }
 
     /// If it is a good idea to show a tooltip, where is pointer?
-    pub fn tooltip_pos(&self) -> Option<Pos2> {
+    pub fn hover_pos(&self) -> Option<Pos2> {
         self.latest_pos
     }
 

egui/src/response.rs

@@ -1,5 +1,5 @@
 use crate::{
-    emath::{lerp, Align, Pos2, Rect},
+    emath::{lerp, Align, Pos2, Rect, Vec2},
     PointerButton, NUM_POINTER_BUTTONS,
 };
 use crate::{CtxRef, Id, LayerId, Sense, Ui};
@@ -118,6 +118,11 @@ impl Response {
         self.clicked[PointerButton::Primary as usize]
     }
 
+    /// Returns true if this widget was clicked this frame by the given button.
+    pub fn clicked_by(&self, button: PointerButton) -> bool {
+        self.clicked[button as usize]
+    }
+
     /// Returns true if this widget was clicked this frame by the secondary mouse button (e.g. the right mouse button).
     pub fn secondary_clicked(&self) -> bool {
         self.clicked[PointerButton::Secondary as usize]
@@ -133,6 +138,16 @@ impl Response {
         self.double_clicked[PointerButton::Primary as usize]
     }
 
+    /// Returns true if this widget was double-clicked this frame by the given button.
+    pub fn double_clicked_by(&self, button: PointerButton) -> bool {
+        self.double_clicked[button as usize]
+    }
+
+    /// `true` if there was a click *outside* this widget this frame.
+    pub fn clicked_elsewhere(&self) -> bool {
+        !self.hovered && self.ctx.input().pointer.any_pressed()
+    }
+
     /// Was the widget enabled?
     /// If false, there was no interaction attempted
     /// and the widget should be drawn in a gray disabled look.
@@ -175,6 +190,10 @@ impl Response {
         self.dragged
     }
 
+    pub fn dragged_by(&self, button: PointerButton) -> bool {
+        self.dragged() && self.ctx.input().pointer.button_down(button)
+    }
+
     /// Did a drag on this widgets begin this frame?
     pub fn drag_started(&self) -> bool {
         self.dragged && self.ctx.input().pointer.any_pressed()
@@ -185,14 +204,13 @@ impl Response {
         self.drag_released
     }
 
-    /// Returns true if this widget was clicked this frame by the given button.
-    pub fn clicked_by(&self, button: PointerButton) -> bool {
-        self.clicked[button as usize]
-    }
-
-    /// Returns true if this widget was double-clicked this frame by the given button.
-    pub fn double_clicked_by(&self, button: PointerButton) -> bool {
-        self.double_clicked[button as usize]
+    /// If dragged, how many points were we dragged and in what direction?
+    pub fn drag_delta(&self) -> Vec2 {
+        if self.dragged() {
+            self.ctx.input().pointer.delta()
+        } else {
+            Vec2::ZERO
+        }
     }
 
     /// Where the pointer (mouse/touch) were when when this widget was clicked or dragged.
@@ -201,6 +219,16 @@ impl Response {
         self.interact_pointer_pos
     }
 
+    /// If it is a good idea to show a tooltip, where is pointer?
+    /// None if the pointer is outside the response area.
+    pub fn hover_pos(&self) -> Option<Pos2> {
+        if self.hovered() {
+            self.ctx.input().pointer.hover_pos()
+        } else {
+            None
+        }
+    }
+
     /// Is the pointer button currently down on this widget?
     /// This is true if the pointer is pressing down or dragging a widget
     pub fn is_pointer_button_down_on(&self) -> bool {

egui/src/widgets/drag_value.rs

@@ -251,7 +251,7 @@ impl<'a> Widget for DragValue<'a> {
                 ui.memory().request_kb_focus(kb_edit_id);
                 ui.memory().drag_value.edit_string = None; // Filled in next frame
             } else if response.dragged() {
-                let mdelta = ui.input().pointer.delta();
+                let mdelta = response.drag_delta();
                 let delta_points = mdelta.x - mdelta.y; // Increase to the right and up
                 let delta_value = delta_points as f64 * speed;
                 if delta_value != 0.0 {

egui/src/widgets/plot.rs

@@ -582,10 +582,8 @@ impl Prepared {
             }
         }
 
-        if response.hovered() {
-            if let Some(pointer) = ui.input().pointer.tooltip_pos() {
-                self.hover(ui, pointer, &mut shapes);
-            }
+        if let Some(pointer) = response.hover_pos() {
+            self.hover(ui, pointer, &mut shapes);
         }
 
         ui.painter().sub_region(self.rect).extend(shapes);

egui/src/widgets/text_edit.rs

@@ -341,7 +341,7 @@ impl<'t> TextEdit<'t> {
                     paint_cursor_end(ui, response.rect.min, &galley, &cursor_at_pointer);
                 }
 
-                if response.hovered() && response.double_clicked() {
+                if response.double_clicked() {
                     // Select word:
                     let center = cursor_at_pointer;
                     let ccursorp = select_word_at(text, center.ccursor);
@@ -371,8 +371,7 @@ impl<'t> TextEdit<'t> {
             }
         }
 
-        if ui.input().pointer.any_pressed() && !response.hovered() {
-            // User clicked somewhere else
+        if response.clicked_elsewhere() {
             ui.memory().surrender_kb_focus(id);
         }
 

egui_demo_lib/src/apps/demo/tests.rs

@@ -255,8 +255,12 @@ impl super::View for InputTest {
             if response.double_clicked_by(button) {
                 new_info += &format!("Double-clicked by {:?}\n", button);
             }
-            if response.dragged() && ui.input().pointer.button_down(button) {
-                new_info += &format!("Dragged by {:?}\n", button);
+            if response.dragged_by(button) {
+                new_info += &format!(
+                    "Dragged by {:?}, delta: {:?}\n",
+                    button,
+                    response.drag_delta()
+                );
             }
         }
         if !new_info.is_empty() {

egui_demo_lib/src/frame_history.rs

@@ -84,24 +84,22 @@ impl FrameHistory {
         let color = ui.visuals().text_color();
         let line_stroke = Stroke::new(1.0, color);
 
-        if let Some(pointer_pos) = ui.input().pointer.tooltip_pos() {
-            if rect.contains(pointer_pos) {
-                let y = pointer_pos.y;
-                shapes.push(Shape::line_segment(
-                    [pos2(rect.left(), y), pos2(rect.right(), y)],
-                    line_stroke,
-                ));
-                let cpu_usage = to_screen.inverse().transform_pos(pointer_pos).y;
-                let text = format!("{:.1} ms", 1e3 * cpu_usage);
-                shapes.push(Shape::text(
-                    ui.fonts(),
-                    pos2(rect.left(), y),
-                    egui::Align2::LEFT_BOTTOM,
-                    text,
-                    TextStyle::Monospace,
-                    color,
-                ));
-            }
+        if let Some(pointer_pos) = response.hover_pos() {
+            let y = pointer_pos.y;
+            shapes.push(Shape::line_segment(
+                [pos2(rect.left(), y), pos2(rect.right(), y)],
+                line_stroke,
+            ));
+            let cpu_usage = to_screen.inverse().transform_pos(pointer_pos).y;
+            let text = format!("{:.1} ms", 1e3 * cpu_usage);
+            shapes.push(Shape::text(
+                ui.fonts(),
+                pos2(rect.left(), y),
+                egui::Align2::LEFT_BOTTOM,
+                text,
+                TextStyle::Monospace,
+                color,
+            ));
         }
 
         let circle_color = color;