Use SystemParametersInfoForDpi in Caret win32 #62

This commit adds the usage of the new API SystemParametersInfoForDpi in
Caret for resizing the caret and other places.

contributes to
#62 and
#128

Author: amartya4256

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

@@ -131,7 +131,7 @@ Rectangle getBoundsInPixels () {
 	}
 	if (width == 0) {
 		int [] buffer = new int [1];
-		if (OS.SystemParametersInfo (OS.SPI_GETCARETWIDTH, 0, buffer, 0)) {
+		if (OS.SystemParametersInfoForDpi (OS.SPI_GETCARETWIDTH, 0, buffer, 0, DPIUtil.mapZoomToDPI(getNativeZoom()))) {
 			return new Rectangle (getXInPixels(), getYInPixels(), buffer [0], getHeightInPixels());
 		}
 	}
@@ -225,7 +225,7 @@ Point getSizeInPixels () {
 	}
 	if (width == 0) {
 		int [] buffer = new int [1];
-		if (OS.SystemParametersInfo (OS.SPI_GETCARETWIDTH, 0, buffer, 0)) {
+		if (OS.SystemParametersInfoForDpi (OS.SPI_GETCARETWIDTH, 0, buffer, 0, DPIUtil.mapZoomToDPI(getNativeZoom()))) {
 			return new Point (buffer [0], getHeightInPixels());
 		}
 	}
@@ -369,7 +369,7 @@ void resize () {
 	int widthInPixels = this.getWidthInPixels();
 	if (image == null && widthInPixels == 0) {
 		int [] buffer = new int [1];
-		if (OS.SystemParametersInfo (OS.SPI_GETCARETWIDTH, 0, buffer, 0)) {
+		if (OS.SystemParametersInfoForDpi (OS.SPI_GETCARETWIDTH, 0, buffer, 0, DPIUtil.mapZoomToDPI(getNativeZoom()))) {
 			widthInPixels = buffer [0];
 		}
 	}
@@ -448,7 +448,7 @@ void setFocus () {
 	int widthInPixels = this.getWidthInPixels();
 	if (image == null && widthInPixels == 0) {
 		int [] buffer = new int [1];
-		if (OS.SystemParametersInfo (OS.SPI_GETCARETWIDTH, 0, buffer, 0)) {
+		if (OS.SystemParametersInfoForDpi (OS.SPI_GETCARETWIDTH, 0, buffer, 0, DPIUtil.mapZoomToDPI(getNativeZoom()))) {
 			widthInPixels = buffer [0];
 		}
 	}
@@ -682,6 +682,7 @@ private static void handleDPIChange(Widget widget, int newZoom, float scalingFac
 	if (caret.font != null) {
 		caret.setFont(caret.font);
 	}
+	caret.resize();
 }
 }