matplotlib
diff --git a/‎lib/matplotlib/backend_bases.py
Lines changed: 9 additions & 13 deletions b/‎lib/matplotlib/backend_bases.py
Lines changed: 9 additions & 13 deletions
diff --git a/‎lib/matplotlib/backend_tools.py
Lines changed: 7 additions & 15 deletions b/‎lib/matplotlib/backend_tools.py
Lines changed: 7 additions & 15 deletions
diff --git a/‎lib/matplotlib/backends/backend_qt5.py
Lines changed: 1 addition & 5 deletions b/‎lib/matplotlib/backends/backend_qt5.py
Lines changed: 1 addition & 5 deletions
@@ -2820,7 +2820,10 @@ def dynamic_update(self):
         pass
 
     def draw_rubberband(self, event, x0, y0, x1, y1):
-        """Draw a rectangle rubberband to indicate zoom limits"""
+        """Draw a rectangle rubberband to indicate zoom limits.
+
+        Note that it is not guaranteed that `x0 <= x1` and `y0 <= y1`.
+        """
         pass
 
     def remove_rubberband(self):
@@ -3075,20 +3078,13 @@ def drag_zoom(self, event):
         if self._xypress:
             x, y = event.x, event.y
             lastx, lasty, a, ind, view = self._xypress[0]
-
-            # adjust x, last, y, last
-            x1, y1, x2, y2 = a.bbox.extents
-            x, lastx = max(min(x, lastx), x1), min(max(x, lastx), x2)
-            y, lasty = max(min(y, lasty), y1), min(max(y, lasty), y2)
-
+            (x1, y1), (x2, y2) = np.clip(
+                [[lastx, lasty], [x, y]], a.bbox.min, a.bbox.max)
             if self._zoom_mode == "x":
-                x1, y1, x2, y2 = a.bbox.extents
-                y, lasty = y1, y2
+                y1, y2 = a.bbox.intervaly
             elif self._zoom_mode == "y":
-                x1, y1, x2, y2 = a.bbox.extents
-                x, lastx = x1, x2
-
-            self.draw_rubberband(event, x, y, lastx, lasty)
+                x1, x2 = a.bbox.intervalx
+            self.draw_rubberband(event, x1, y1, x2, y2)
 
     def release_zoom(self, event):
         """the release mouse button callback in zoom to rect mode"""
 
@@ -895,23 +895,15 @@ def _mouse_move(self, event):
 
         if self._xypress:
             x, y = event.x, event.y
-            lastx, lasty, a, _ind, _view = self._xypress[0]
-
-            # adjust x, last, y, last
-            x1, y1, x2, y2 = a.bbox.extents
-            x, lastx = max(min(x, lastx), x1), min(max(x, lastx), x2)
-            y, lasty = max(min(y, lasty), y1), min(max(y, lasty), y2)
-
+            lastx, lasty, a, ind, view = self._xypress[0]
+            (x1, y1), (x2, y2) = np.clip(
+                [[lastx, lasty], [x, y]], a.bbox.min, a.bbox.max)
             if self._zoom_mode == "x":
-                x1, y1, x2, y2 = a.bbox.extents
-                y, lasty = y1, y2
+                y1, y2 = a.bbox.intervaly
             elif self._zoom_mode == "y":
-                x1, y1, x2, y2 = a.bbox.extents
-                x, lastx = x1, x2
-
-            self.toolmanager.trigger_tool('rubberband',
-                                          self,
-                                          data=(x, y, lastx, lasty))
+                x1, x2 = a.bbox.intervalx
+            self.toolmanager.trigger_tool(
+                'rubberband', self, data=(x1, y1, x2, y2))
 
     def _release(self, event):
         """the release mouse button callback in zoom to rect mode"""
 
@@ -708,11 +708,7 @@ def draw_rubberband(self, event, x0, y0, x1, y1):
         height = self.canvas.figure.bbox.height
         y1 = height - y1
         y0 = height - y0
-
-        w = abs(x1 - x0)
-        h = abs(y1 - y0)
-
-        rect = [int(val)for val in (min(x0, x1), min(y0, y1), w, h)]
+        rect = [int(val) for val in (x0, y0, x1 - x0, y1 - y0)]
         self.canvas.drawRectangle(rect)
 
     def remove_rubberband(self):