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Reintroduce scaling methods for Rectangle #2295

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Reintroduce scaling methods for Rectangle #2295

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4 changes: 2 additions & 2 deletions ...es/org.eclipse.swt/Eclipse SWT Tests/win32/org/eclipse/swt/widgets/ControlWin32Tests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -100,11 +100,11 @@ public void testCorrectScaleUpUsingDifferentSetBoundsMethod() {

button.setBounds(new Rectangle(0, 47, 200, 47));
assertEquals("Control::setBounds(Rectangle) doesn't scale up correctly",
new Rectangle(0, 82, 350, 82), button.getBoundsInPixels());
new Rectangle(0, 82, 350, 83), button.getBoundsInPixels());

button.setBounds(0, 47, 200, 47);
assertEquals("Control::setBounds(int, int, int, int) doesn't scale up correctly",
new Rectangle(0, 82, 350, 82), button.getBoundsInPixels());
new Rectangle(0, 82, 350, 83), button.getBoundsInPixels());
}

record FontComparison(int originalFontHeight, int currentFontHeight) {
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43 changes: 43 additions & 0 deletions bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/internal/Win32DPIUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -108,6 +108,20 @@ public static Point scaleDown(Drawable drawable, Point point, int zoom) {
}

public static Rectangle scaleDown(Rectangle rect, int zoom) {
if (zoom == 100 || rect == null) return rect;
if (rect instanceof Rectangle.OfFloat rectOfFloat) return scaleDown(rectOfFloat, zoom);
Rectangle scaledRect = new Rectangle.OfFloat (0,0,0,0);
Point scaledTopLeft = scaleDown(new Point (rect.x, rect.y), zoom);
Point scaledBottomRight = scaleDown(new Point (rect.x + rect.width, rect.y + rect.height), zoom);

scaledRect.x = scaledTopLeft.x;
scaledRect.y = scaledTopLeft.y;
scaledRect.width = scaledBottomRight.x - scaledTopLeft.x;
scaledRect.height = scaledBottomRight.y - scaledTopLeft.y;
return scaledRect;
}

public static Rectangle scaleDown(Rectangle.OfFloat rect, int zoom) {
return scaleBounds(rect, 100, zoom);
}

Expand All @@ -120,6 +134,21 @@ public static Rectangle scaleDown(Drawable drawable, Rectangle rect, int zoom) {
* Returns a new rectangle as per the scaleFactor.
*/
public static Rectangle scaleBounds (Rectangle rect, int targetZoom, int currentZoom) {
if (rect == null || targetZoom == currentZoom) return rect;
if (rect instanceof Rectangle.OfFloat rectOfFloat) return scaleBounds(rectOfFloat, targetZoom, currentZoom);
float scaleFactor = ((float)targetZoom) / (float)currentZoom;
Rectangle returnRect = new Rectangle.OfFloat (0,0,0,0);
returnRect.x = Math.round (rect.x * scaleFactor);
returnRect.y = Math.round (rect.y * scaleFactor);
returnRect.width = Math.round (rect.width * scaleFactor);
returnRect.height = Math.round (rect.height * scaleFactor);
return returnRect;
}

/**
* Returns a new rectangle as per the scaleFactor.
*/
public static Rectangle scaleBounds (Rectangle.OfFloat rect, int targetZoom, int currentZoom) {
if (rect == null || targetZoom == currentZoom) return rect;
Rectangle.OfFloat fRect = FloatAwareGeometryFactory.createFrom(rect);
float scaleFactor = DPIUtil.getScalingFactor(targetZoom, currentZoom);
Expand Down Expand Up @@ -185,6 +214,20 @@ public static Point scaleUp(Drawable drawable, Point point, int zoom) {
}

public static Rectangle scaleUp(Rectangle rect, int zoom) {
if (zoom == 100 || rect == null) return rect;
if (rect instanceof Rectangle.OfFloat rectOfFloat) return scaleUp(rectOfFloat, zoom);
Rectangle scaledRect = new Rectangle.OfFloat(0,0,0,0);
Point scaledTopLeft = scaleUp (new Point(rect.x, rect.y), zoom);
Point scaledBottomRight = scaleUp (new Point(rect.x + rect.width, rect.y + rect.height), zoom);

scaledRect.x = scaledTopLeft.x;
scaledRect.y = scaledTopLeft.y;
scaledRect.width = scaledBottomRight.x - scaledTopLeft.x;
scaledRect.height = scaledBottomRight.y - scaledTopLeft.y;
return scaledRect;
}

public static Rectangle scaleUp(Rectangle.OfFloat rect, int zoom) {
return scaleBounds(rect, zoom, 100);
}

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4 changes: 2 additions & 2 deletions ...rg.eclipse.swt.tests.win32/JUnit Tests/org/eclipse/swt/tests/win32/Win32DPIUtilTests.java
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Original file line number Diff line number Diff line change
Expand Up @@ -202,7 +202,7 @@ public void scaleUpPoint() {
@Test
public void scaleUpRectangle() {
Rectangle valueAt200 = new Rectangle(100, 150, 10, 14);
Rectangle valueAt150 = new Rectangle(75, 113, 8, 11);
Rectangle valueAt150 = new Rectangle(75, 113, 8, 10);
Rectangle valueAt100 = new Rectangle(50, 75, 5, 7);

Rectangle scaledValue = Win32DPIUtils.scaleUp(valueAt100, 200);
Expand All @@ -225,7 +225,7 @@ public void scaleDownscaleUpRectangleInvertible() {
for (int zoom1 : zooms) {
for (int zoom2 : zooms) {
for (int i = 1; i <= 10000; i++) {
Rectangle rect = new Rectangle(0, 0, i, i);
Rectangle rect = new Rectangle.OfFloat(0, 0, i, i);
Rectangle scaleDown = Win32DPIUtils.scaleDown(rect, zoom1);
Rectangle scaleUp = Win32DPIUtils.scaleUp(scaleDown, zoom2);
scaleDown = Win32DPIUtils.scaleDown(scaleUp, zoom2);
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