Attempt to add event corresponding to hover

symbolic23 · symbolic23 · commit 068e770cf27f · 2023-04-25T15:57:59.000-04:00
diff --git a/lib/matplotlib/backends/backend_qt.py b/lib/matplotlib/backends/backend_qt.py
@@ -9,7 +9,7 @@
 from matplotlib.backend_bases import (
     _Backend, FigureCanvasBase, FigureManagerBase, NavigationToolbar2,
     TimerBase, cursors, ToolContainerBase, MouseButton,
-    CloseEvent, KeyEvent, LocationEvent, MouseEvent, ResizeEvent)
+    CloseEvent, KeyEvent, LocationEvent, MouseEvent, ResizeEvent, HoverEvent)
 import matplotlib.backends.qt_editor.figureoptions as figureoptions
 from . import qt_compat
 from .qt_compat import (
@@ -305,6 +305,17 @@ def mouseReleaseEvent(self, event):
                        modifiers=self._mpl_modifiers(),
                        guiEvent=event)._process()
 
+    def mouseOverEvent(self, event):
+        artist = event.artist
+        if not artist.get_hover:
+            thismouse = MouseEvent("motion_notify_event", self,
+                       *self.mouseEventCoords(event),
+                       modifiers=self._mpl_modifiers(),
+                       guiEvent=event)
+            hovering = HoverEvent("motion_notify_event", self,
+                                thismouse, artist, None)
+            hovering._process()
+
     def wheelEvent(self, event):
         # from QWheelEvent::pixelDelta doc: pixelDelta is sometimes not
         # provided (`isNull()`) and is unreliable on X11 ("xcb").
