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[Win32] Adapt further places to round up when computing control size #2729

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Nov 6, 2025
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[Win32] Adapt further places to round up when computing control size #2729

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2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/graphics/Rectangle.java
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Expand Up @@ -426,7 +426,7 @@ public OfFloat(float x, float y, float width, float height) {
this(x, y, width, height, RoundingMode.ROUND, RoundingMode.ROUND);
}

private OfFloat(float x, float y, float width, float height, RoundingMode locationRounding, RoundingMode sizeRounding) {
public OfFloat(float x, float y, float width, float height, RoundingMode locationRounding, RoundingMode sizeRounding) {
this.locationRounding = locationRounding;
this.sizeRounding = sizeRounding;
setX(x);
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44 changes: 31 additions & 13 deletions bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/internal/Win32DPIUtils.java
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Expand Up @@ -131,7 +131,7 @@ public static Point pixelToPointAsLocation(Point point, int zoom) {
return pixelToPoint(point, zoom, RoundingMode.ROUND);
}

public static Point pixelToPointAsConservativeSize(Point point, int zoom) {
public static Point pixelToPointAsSufficientlyLargeSize(Point point, int zoom) {
return pixelToPoint(point, zoom, RoundingMode.UP);
}

Expand All @@ -150,16 +150,23 @@ private static Point.OfFloat pixelToPoint(Point.OfFloat point, int zoom) {
}

public static Rectangle pixelToPoint(Rectangle rect, int zoom) {
return pixelToPoint(rect, zoom, RoundingMode.ROUND);
}

public static Rectangle pixelToPointWithSufficientlyLargeSize(Rectangle rect, int zoom) {
return pixelToPoint(rect, zoom, RoundingMode.UP);
}

private static Rectangle pixelToPoint(Rectangle rect, int zoom, RoundingMode sizeRounding) {
if (zoom == 100 || rect == null) return rect;
Rectangle.OfFloat floatRect = Rectangle.OfFloat.from(rect);
Point.OfFloat scaledTopLeft = pixelToPoint(floatRect.getTopLeft(), zoom);
Point.OfFloat scaledBottomRight = pixelToPoint(floatRect.getBottomRight(), zoom);
Rectangle.OfFloat scaledRect = floatRect.clone();
scaledRect.setX(scaledTopLeft.getX());
scaledRect.setY(scaledTopLeft.getY());
scaledRect.setWidth(scaledBottomRight.getX() - scaledTopLeft.getX());
scaledRect.setHeight(scaledBottomRight.getY() - scaledTopLeft.getY());
return scaledRect;
float scaledX = scaledTopLeft.getX();
float scaleyY = scaledTopLeft.getY();
float scaledWidth = scaledBottomRight.getX() - scaledTopLeft.getX();
float scaledHeight = scaledBottomRight.getY() - scaledTopLeft.getY();
return new Rectangle.OfFloat(scaledX, scaleyY, scaledWidth, scaledHeight, RoundingMode.ROUND, sizeRounding);
}

public static Rectangle pixelToPoint(Drawable drawable, Rectangle rect, int zoom) {
Expand Down Expand Up @@ -252,6 +259,10 @@ public static Point pointToPixelAsLocation(Drawable drawable, Point point, int z
}

public static Point pointToPixelAsSize(Point point, int zoom) {
return pointToPixel(point, zoom, RoundingMode.ROUND);
}

public static Point pointToPixelAsSufficientlyLargeSize(Point point, int zoom) {
return pointToPixel(point, zoom, RoundingMode.UP);
}

Expand All @@ -260,16 +271,23 @@ public static Point pointToPixelAsLocation(Point point, int zoom) {
}

public static Rectangle pointToPixel(Rectangle rect, int zoom) {
return pointToPixel(rect, zoom, RoundingMode.ROUND);
}

public static Rectangle pointToPixelWithSufficientlyLargeSize(Rectangle rect, int zoom) {
return pointToPixel(rect, zoom, RoundingMode.UP);
}

private static Rectangle pointToPixel(Rectangle rect, int zoom, RoundingMode sizeRounding) {
if (zoom == 100 || rect == null) return rect;
Rectangle.OfFloat floatRect = Rectangle.OfFloat.from(rect);
Point.OfFloat scaledTopLeft = pointToPixel(floatRect.getTopLeft(), zoom);
Point.OfFloat scaledBottomRight = pointToPixel(floatRect.getBottomRight(), zoom);
Rectangle.OfFloat scaledRect = floatRect.clone();
scaledRect.setX(scaledTopLeft.getX());
scaledRect.setY(scaledTopLeft.getY());
scaledRect.setWidth(scaledBottomRight.getX() - scaledTopLeft.getX());
scaledRect.setHeight(scaledBottomRight.getY() - scaledTopLeft.getY());
return scaledRect;
float scaledX = scaledTopLeft.getX();
float scaleyY = scaledTopLeft.getY();
float scaledWidth = scaledBottomRight.getX() - scaledTopLeft.getX();
float scaledHeight = scaledBottomRight.getY() - scaledTopLeft.getY();
return new Rectangle.OfFloat(scaledX, scaleyY, scaledWidth, scaledHeight, RoundingMode.ROUND, sizeRounding);
}

public static Rectangle pointToPixel(Drawable drawable, Rectangle rect, int zoom) {
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2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Button.java
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Expand Up @@ -326,7 +326,7 @@ else if ((style & SWT.RIGHT) != 0) {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int width = 0, height = 0, border = getBorderWidthInPixels ();
if ((style & SWT.ARROW) != 0) {
if ((style & (SWT.UP | SWT.DOWN)) != 0) {
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2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Combo.java
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Expand Up @@ -596,7 +596,7 @@ public void clearSelection () {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int width = 0, height = 0;
if (hintInPoints.x == SWT.DEFAULT) {
long newFont, oldFont = 0;
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2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Composite.java
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Expand Up @@ -229,7 +229,7 @@ Point computeSizeInPixels (Point hintInPoints, boolean changed) {
* Since computeTrim can be overridden by subclasses, we cannot
* call computeTrimInPixels directly.
*/
Rectangle trim = Win32DPIUtils.pointToPixel(computeTrim (0, 0, sizeInPoints.x, sizeInPoints.y), getZoom());
Rectangle trim = Win32DPIUtils.pointToPixelWithSufficientlyLargeSize(computeTrim (0, 0, sizeInPoints.x, sizeInPoints.y), getZoom());
return new Point (trim.width, trim.height);
}

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4 changes: 2 additions & 2 deletions bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Control.java
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Expand Up @@ -621,14 +621,14 @@ public Point computeSize (int wHint, int hHint, boolean changed){
int zoom = getZoom();
//We should never return a size that is to small, RoundingMode.UP ensures we at worst case report
//a size that is a bit too large by half a point
return Win32DPIUtils.pixelToPointAsConservativeSize(computeSizeInPixels(new Point.OfFloat(wHint, hHint, RoundingMode.UP), changed), zoom);
return Win32DPIUtils.pixelToPointAsSufficientlyLargeSize(computeSizeInPixels(new Point(wHint, hHint), changed), zoom);
}

Point computeSizeInPixels (Point hintInPoints, boolean changed) {
int width = DEFAULT_WIDTH;
int height = DEFAULT_HEIGHT;
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
if (hintInPoints.x != SWT.DEFAULT) width = hintInPixels.x;
if (hintInPoints.y != SWT.DEFAULT) height = hintInPixels.y;
int border = getBorderWidthInPixels ();
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2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/CoolBar.java
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Expand Up @@ -143,7 +143,7 @@ protected void checkSubclass () {
@Override
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int width = 0, height = 0;
int border = getBorderWidthInPixels ();
int newWidth = hintInPoints.x == SWT.DEFAULT ? 0x3FFF : hintInPixels.x + (border * 2);
Expand Down
14 changes: 7 additions & 7 deletions bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/CoolItem.java
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Expand Up @@ -186,16 +186,16 @@ protected void checkSubclass () {
public Point computeSize (int wHint, int hHint) {
checkWidget ();
int zoom = getZoom();
wHint = (wHint != SWT.DEFAULT ? DPIUtil.pointToPixel(wHint, zoom) : wHint);
hHint = (hHint != SWT.DEFAULT ? DPIUtil.pointToPixel(hHint, zoom) : hHint);
return Win32DPIUtils.pixelToPointAsConservativeSize(computeSizeInPixels(wHint, hHint), zoom);
return Win32DPIUtils.pixelToPointAsSufficientlyLargeSize(computeSizeInPixels(new Point(wHint, hHint)), zoom);
}
Point computeSizeInPixels (int wHint, int hHint) {
Point computeSizeInPixels (Point sizeHintInPoints) {
int zoom = getZoom();
Point sizeHintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(sizeHintInPoints, zoom);
int index = parent.indexOf (this);
if (index == -1) return new Point (0, 0);
int width = wHint, height = hHint;
if (wHint == SWT.DEFAULT) width = 32;
if (hHint == SWT.DEFAULT) height = 32;
int width = sizeHintInPixels.x, height = sizeHintInPixels.y;
if (sizeHintInPoints.x == SWT.DEFAULT) width = 32;
if (sizeHintInPoints.y == SWT.DEFAULT) height = 32;
if ((parent.style & SWT.VERTICAL) != 0) {
height += parent.getMargin (index);
} else {
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2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/DateTime.java
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Expand Up @@ -222,7 +222,7 @@ protected void checkSubclass () {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int width = 0, height = 0;
if (hintInPoints.x == SWT.DEFAULT || hintInPoints.y == SWT.DEFAULT) {
if ((style & SWT.CALENDAR) != 0) {
Expand Down
2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/ExpandBar.java
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Expand Up @@ -129,7 +129,7 @@ static int checkStyle (int style) {
@Override
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int height = 0, width = 0;
if (hintInPoints.x == SWT.DEFAULT || hintInPoints.y == SWT.DEFAULT) {
if (itemCount > 0) {
Expand Down
2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Label.java
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Expand Up @@ -134,7 +134,7 @@ static int checkStyle (int style) {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int width = 0, height = 0, border = getBorderWidthInPixels ();
if ((style & SWT.SEPARATOR) != 0) {
int lineWidth = getSystemMetrics (OS.SM_CXBORDER);
Expand Down
2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Link.java
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Expand Up @@ -162,7 +162,7 @@ long callWindowProc (long hwnd, int msg, long wParam, long lParam) {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int width, height;
/*
* When the text is empty, LM_GETIDEALSIZE returns zero width and height,
Expand Down
2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/List.java
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Expand Up @@ -217,7 +217,7 @@ static int checkStyle (int style) {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int width = 0, height = 0;
if (hintInPoints.x == SWT.DEFAULT) {
if ((style & SWT.H_SCROLL) != 0) {
Expand Down
2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/ProgressBar.java
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Expand Up @@ -123,7 +123,7 @@ static int checkStyle (int style) {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int border = getBorderWidthInPixels ();
int width = border * 2, height = border * 2;
if ((style & SWT.HORIZONTAL) != 0) {
Expand Down
2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Sash.java
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Expand Up @@ -130,7 +130,7 @@ static int checkStyle (int style) {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int border = getBorderWidthInPixels ();
int width = border * 2, height = border * 2;
if ((style & SWT.HORIZONTAL) != 0) {
Expand Down
2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Scale.java
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Expand Up @@ -148,7 +148,7 @@ static int checkStyle (int style) {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int border = getBorderWidthInPixels ();
int width = border * 2, height = border * 2;
RECT rect = new RECT ();
Expand Down
4 changes: 2 additions & 2 deletions bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Scrollable.java
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Expand Up @@ -121,8 +121,8 @@ long callWindowProc (long hwnd, int msg, long wParam, long lParam) {
public Rectangle computeTrim (int x, int y, int width, int height) {
checkWidget ();
int zoom = getZoom();
Rectangle rectangle = Win32DPIUtils.pointToPixel(new Rectangle(x, y, width, height), zoom);
return Win32DPIUtils.pixelToPoint(computeTrimInPixels(rectangle.x, rectangle.y, rectangle.width, rectangle.height), zoom);
Rectangle rectangle = Win32DPIUtils.pointToPixelWithSufficientlyLargeSize(new Rectangle(x, y, width, height), zoom);
return Win32DPIUtils.pixelToPointWithSufficientlyLargeSize(computeTrimInPixels(rectangle.x, rectangle.y, rectangle.width, rectangle.height), zoom);
}

Rectangle computeTrimInPixels (int x, int y, int width, int height) {
Expand Down
2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Slider.java
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Expand Up @@ -181,7 +181,7 @@ static int checkStyle (int style) {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int border = getBorderWidthInPixels ();
int width = border * 2, height = border * 2;
if ((style & SWT.HORIZONTAL) != 0) {
Expand Down
2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Spinner.java
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Expand Up @@ -261,7 +261,7 @@ void addVerifyListener (VerifyListener listener) {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int width = 0, height = 0;
if (hintInPoints.x == SWT.DEFAULT || hintInPoints.y == SWT.DEFAULT) {
long newFont, oldFont = 0;
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2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Table.java
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Expand Up @@ -1429,7 +1429,7 @@ public void clearAll () {
@Override
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
if (fixScrollWidth) setScrollWidth (null, true);
//This code is intentionally commented
// if (itemHeight == -1 && hooks (SWT.MeasureItem)) {
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2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Text.java
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Expand Up @@ -706,7 +706,7 @@ public void clearSelection () {
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
checkWidget ();
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int height = 0, width = 0;
if (hintInPoints.x == SWT.DEFAULT || hintInPoints.y == SWT.DEFAULT) {
long newFont, oldFont = 0;
Expand Down
2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/ToolBar.java
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Expand Up @@ -211,7 +211,7 @@ void clearSizeCache(boolean changed) {
@Override
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int count = (int)OS.SendMessage (handle, OS.TB_BUTTONCOUNT, 0, 0);
if (count == this._count && hintInPixels.x == this._wHint && hintInPixels.y == this._hHint) {
// Return already cached values calculated previously
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2 changes: 1 addition & 1 deletion bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Tree.java
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Expand Up @@ -1826,7 +1826,7 @@ long CompareFunc (long lParam1, long lParam2, long lParamSort) {
@Override
Point computeSizeInPixels (Point hintInPoints, boolean changed) {
int zoom = getZoom();
Point hintInPixels = Win32DPIUtils.pointToPixelAsSize(hintInPoints, zoom);
Point hintInPixels = Win32DPIUtils.pointToPixelAsSufficientlyLargeSize(hintInPoints, zoom);
int width = 0, height = 0;
if (hwndHeader != 0) {
HDITEM hdItem = new HDITEM ();
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