fixes 0003130: FreeCAD 0.17 Qt5 bugs with external display

FreeCAD · Apr 4, 2019 · 64cb745 · 64cb745
1 parent 228876f
commit 64cb745
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp b/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
@@ -1195,11 +1195,17 @@ bool ViewProviderSketch::mouseMove(const SbVec2s &cursorPos, Gui::View3DInventor
             return true;
         }
         case STATUS_SKETCH_UseRubberBand: {
+            // Here we must use the device-pixel-ratio to compute the correct y coordinate (#0003130)
+#if QT_VERSION >= 0x050000
+            qreal dpr = viewer->getGLWidget()->devicePixelRatioF();
+#else
+            qreal dpr = 1;
+#endif
             newCursorPos = cursorPos;
             rubberband->setCoords(prvCursorPos.getValue()[0],
-                       viewer->getGLWidget()->height() - prvCursorPos.getValue()[1],
+                       viewer->getGLWidget()->height()*dpr - prvCursorPos.getValue()[1],
                        newCursorPos.getValue()[0],
-                       viewer->getGLWidget()->height() - newCursorPos.getValue()[1]);
+                       viewer->getGLWidget()->height()*dpr - newCursorPos.getValue()[1]);
             viewer->redraw();
             return true;
         }