[Win32] Properly convert event coordinates in Tracker

The coordinates for mouse move events in Tracker are currently just
scaled via pixel/point conversion methods. However, those are display
coordinates which need to take the coordinate system specifics into
account and thus have to be converted via the display methods for
translating coordinates.

This change adapts the implementation accordingly.

Author: HeikoKlare

bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Tracker.java

@@ -846,7 +846,11 @@ public void setRectangles (Rectangle [] rectangles) {
 	if (rectangles == null) error (SWT.ERROR_NULL_ARGUMENT);
 	Rectangle [] rectanglesInPixels = new Rectangle [rectangles.length];
 	for (int i = 0; i < rectangles.length; i++) {
-		rectanglesInPixels [i] = Win32DPIUtils.pointToPixel (rectangles [i], getZoom());
+		if (parent != null) {
+			rectanglesInPixels [i] = Win32DPIUtils.pointToPixel (rectangles [i], getZoom());
+		} else {
+			rectanglesInPixels [i] = display.translateToDisplayCoordinates(rectangles[i]);
+		}
 	}
 	setRectanglesInPixels (rectanglesInPixels);
 }
@@ -999,7 +1003,8 @@ LRESULT wmKeyDown (long hwnd, long wParam, long lParam) {
 			rectsToErase [i] = new Rectangle (current.x, current.y, current.width, current.height);
 		}
 		Event event = new Event ();
-		event.setLocation(DPIUtil.pixelToPoint(oldX + xChange, getZoom()), DPIUtil.pixelToPoint(oldY + yChange, getZoom()));
+		Point newLocationInPoints = display.translateFromDisplayCoordinates(new Point(oldX + xChange, oldY + yChange));
+		event.setLocation(newLocationInPoints.x, newLocationInPoints.y);
 		Point cursorPos;
 		if ((style & SWT.RESIZE) != 0) {
 			resizeRectangles (xChange, yChange);
@@ -1119,8 +1124,8 @@ LRESULT wmMouse (int message, long wParam, long lParam) {
 			rectsToErase [i] = new Rectangle (current.x, current.y, current.width, current.height);
 		}
 		Event event = new Event ();
-		int zoom = getZoom();
-		event.setLocation(DPIUtil.pixelToPoint(newX, zoom), DPIUtil.pixelToPoint(newY, zoom));
+		Point newLocationInPoints = display.translateFromDisplayCoordinates(new Point(newX, newY));
+		event.setLocation(newLocationInPoints.x, newLocationInPoints.y);
 		if ((style & SWT.RESIZE) != 0) {
 			if (isMirrored) {
 				resizeRectangles (oldX - newX, newY - oldY);