Add directional sizing cursors.

Tested on GTK, macOS, NbAgg, Qt, and Tk.

Author: QuLogic

lib/matplotlib/backend_tools.py

@@ -32,6 +32,8 @@ class Cursors(enum.IntEnum):  # Must subclass int for the macOS backend.
     SELECT_REGION = enum.auto()
     MOVE = enum.auto()
     WAIT = enum.auto()
+    RESIZE_HORIZONTAL = enum.auto()
+    RESIZE_VERTICAL = enum.auto()
 cursors = Cursors  # Backcompat.
 
 # Views positions tool

lib/matplotlib/backends/_backend_tk.py

@@ -34,7 +34,9 @@
     cursors.POINTER: "arrow",
     cursors.SELECT_REGION: "tcross",
     cursors.WAIT: "watch",
-    }
+    cursors.RESIZE_HORIZONTAL: "sb_h_double_arrow",
+    cursors.RESIZE_VERTICAL: "sb_v_double_arrow",
+}
 
 
 @contextmanager

lib/matplotlib/backends/backend_gtk3.py

@@ -95,6 +95,8 @@ def _mpl_to_gtk_cursor(mpl_cursor):
         cursors.POINTER: "default",
         cursors.SELECT_REGION: "crosshair",
         cursors.WAIT: "wait",
+        cursors.RESIZE_HORIZONTAL: "ew-resize",
+        cursors.RESIZE_VERTICAL: "ns-resize",
     }[mpl_cursor]
     return Gdk.Cursor.new_from_name(Gdk.Display.get_default(), name)
 

lib/matplotlib/backends/backend_qt5.py

@@ -79,7 +79,9 @@
     cursors.POINTER: QtCore.Qt.ArrowCursor,
     cursors.SELECT_REGION: QtCore.Qt.CrossCursor,
     cursors.WAIT: QtCore.Qt.WaitCursor,
-    }
+    cursors.RESIZE_HORIZONTAL: QtCore.Qt.SizeHorCursor,
+    cursors.RESIZE_VERTICAL: QtCore.Qt.SizeVerCursor,
+}
 
 
 # make place holder

lib/matplotlib/backends/backend_webagg_core.py

@@ -380,6 +380,8 @@ def set_cursor(self, cursor):
                 backend_tools.Cursors.SELECT_REGION: 'crosshair',
                 backend_tools.Cursors.MOVE: 'move',
                 backend_tools.Cursors.WAIT: 'wait',
+                backend_tools.Cursors.RESIZE_HORIZONTAL: 'ew-resize',
+                backend_tools.Cursors.RESIZE_VERTICAL: 'ns-resize',
             }[cursor]
             self.canvas.send_event("cursor", cursor=cursor)
         self.cursor = cursor

lib/matplotlib/backends/backend_wx.py

@@ -1049,6 +1049,8 @@ def _set_frame_icon(frame):
     cursors.POINTER: wx.CURSOR_ARROW,
     cursors.SELECT_REGION: wx.CURSOR_CROSS,
     cursors.WAIT: wx.CURSOR_WAIT,
+    cursors.RESIZE_HORIZONTAL: wx.CURSOR_SIZEWE,
+    cursors.RESIZE_VERTICAL: wx.CURSOR_SIZENS,
 }
 
 

src/_macosx.m

@@ -1380,6 +1380,8 @@ -(void)save_figure:(id)sender
       case 4: [[NSCursor openHandCursor] set]; break;
       /* OSX handles busy state itself so no need to set a cursor here */
       case 5: break;
+      case 6: [[NSCursor resizeLeftRightCursor] set]; break;
+      case 7: [[NSCursor resizeUpDownCursor] set]; break;
       default: return NULL;
     }
     Py_RETURN_NONE;