X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8ea82c09ff6ffa9f41abc117ddc4eba495cedfb5..ad653fa23069c5d9378247084f03c9a718c3ad62:/src/msw/uiaction.cpp?ds=inline

diff --git a/src/msw/uiaction.cpp b/src/msw/uiaction.cpp
index 56ea8fa3a9..bc5bde1ad1 100644
--- a/src/msw/uiaction.cpp
+++ b/src/msw/uiaction.cpp
@@ -65,8 +65,10 @@ bool wxUIActionSimulator::MouseMove(long x, long y)
     int displayx, displayy;
     wxDisplaySize(&displayx, &displayy);
 
-    int scaledx = wxRound(((float)x / displayx) * 65535);
-    int scaledy = wxRound(((float)y / displayy) * 65535);
+    // Casts are safe because x and y are supposed to be less than the display
+    // size, so there is no danger of overflow.
+    DWORD scaledx = static_cast<DWORD>(ceil(x * 65535.0 / (displayx-1)));
+    DWORD scaledy = static_cast<DWORD>(ceil(y * 65535.0 / (displayy-1)));
     mouse_event(MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE, scaledx, scaledy, 0, 0);
 
     return true;