Merge pull request #2795 from tarkah/fix/image-viewer-redraw

Request redraw in image viewer update

Author: hecrj

widget/src/image/viewer.rs

@@ -215,6 +215,7 @@ where
                     }
                 }
 
+                shell.request_redraw();
                 shell.capture_event();
             }
             Event::Mouse(mouse::Event::ButtonPressed(mouse::Button::Left)) => {
@@ -226,13 +227,16 @@ where
 
                 state.cursor_grabbed_at = Some(cursor_position);
                 state.starting_offset = state.current_offset;
+
+                shell.request_redraw();
                 shell.capture_event();
             }
             Event::Mouse(mouse::Event::ButtonReleased(mouse::Button::Left)) => {
                 let state = tree.state.downcast_mut::<State>();
 
                 if state.cursor_grabbed_at.is_some() {
                     state.cursor_grabbed_at = None;
+                    shell.request_redraw();
                     shell.capture_event();
                 }
             }
@@ -273,6 +277,7 @@ where
                     };
 
                     state.current_offset = Vector::new(x, y);
+                    shell.request_redraw();
                     shell.capture_event();
                 }
             }