fixed wrong mouse coordinates on Windows customers with screen scaling > 100%

this fixes #18

(cherry picked from commit faa45f7)

Author: pinhead84

CHANGELOG.md

@@ -4,7 +4,7 @@ Changelog for Remote Support Tool
 1.0.1 (13 Mar 2019)
 -------------------
 
-...
+-   fixed [issue #18](https://github.com/OpenIndex/RemoteSupportTool/issues/18): Mouse is shifted on Windows clients with high resolution screen
 
 
 1.0.0 (20 Oct 2018)

Customer/src/main/java/de/openindex/support/customer/CustomerApplication.java

@@ -38,6 +38,7 @@
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.KeyEvent;
+import java.awt.geom.AffineTransform;
 import java.awt.image.BufferedImage;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
@@ -444,7 +445,27 @@ else if (request.keyChar != KeyEvent.CHAR_UNDEFINED) {
                 } else if (object instanceof MouseMoveRequest) {
 
                     final MouseMoveRequest request = (MouseMoveRequest) object;
-                    robot.mouseMove(request.x, request.y);
+                    final int x;
+                    final int y;
+
+                    // On Windows systems we need to convert the coordinates
+                    // according to the current screen scaling factor.
+                    if (SystemUtils.IS_OS_WINDOWS) {
+                        final GraphicsConfiguration screenConfiguration = screen.getDefaultConfiguration();
+                        final AffineTransform transform = screenConfiguration.getDefaultTransform();
+                        final double scaleX = (transform != null && transform.getScaleX() > 0) ?
+                                transform.getScaleX() : 1;
+                        final double scaleY = (transform != null && transform.getScaleY() > 0) ?
+                                transform.getScaleY() : 1;
+
+                        x = (int) ((double) request.x / scaleX);
+                        y = (int) ((double) request.y / scaleY);
+                    } else {
+                        x = request.x;
+                        y = request.y;
+                    }
+
+                    robot.mouseMove(x, y);
 
                 } else if (object instanceof MousePressRequest) {