X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/478ba84485d00d0d9a80ce3304f226355f457471..2f72b58ae6635bca17e8e19889a84e3b70c7f3a5:/wxPython/wx/lib/ogl/_canvas.py

diff --git a/wxPython/wx/lib/ogl/_canvas.py b/wxPython/wx/lib/ogl/_canvas.py
index f5f75a1457..00c22ab782 100644
--- a/wxPython/wx/lib/ogl/_canvas.py
+++ b/wxPython/wx/lib/ogl/_canvas.py
@@ -93,10 +93,13 @@ class ShapeCanvas(wx.ScrolledWindow):
         # If we're very close to the position we started dragging
         # from, this may not be an intentional drag at all.
         if dragging:
-            dx = abs(dc.LogicalToDeviceX(x - self._firstDragX))
-            dy = abs(dc.LogicalToDeviceY(y - self._firstDragY))
-            if self._checkTolerance and (dx <= self.GetDiagram().GetMouseTolerance()) and (dy <= self.GetDiagram().GetMouseTolerance()):
-                return
+            if self._checkTolerance:
+                # the difference between two logical coordinates is a logical coordinate
+                dx = abs(x - self._firstDragX) 
+                dy = abs(y - self._firstDragY)
+                toler = self.GetDiagram().GetMouseTolerance()
+                if (dx <= toler) and (dy <= toler):
+                    return
             # If we've ignored the tolerance once, then ALWAYS ignore
             # tolerance in this drag, even if we come back within
             # the tolerance range.