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[GTK] Can draw outside window on Wayland #3145 #3284

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[GTK] Can draw outside window on Wayland #3145 #3284

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11 changes: 11 additions & 0 deletions bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/graphics/GC.java
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.cairo.*;
import org.eclipse.swt.internal.gtk.*;
import org.eclipse.swt.widgets.*;

/**
* Class <code>GC</code> is where all of the drawing capabilities that are
Expand Down Expand Up @@ -2622,6 +2623,16 @@ void init(Drawable drawable, GCData data, long gdkGC) {
if (cairoTransformationMatrix == null) cairoTransformationMatrix = new double[6];
Cairo.cairo_get_matrix(data.cairo, cairoTransformationMatrix);
clipping = getClipping();
if (drawable instanceof Control control) {
final Display display = control.getDisplay();
for (Composite parent = control.getParent(); parent != null; parent = parent.getParent()) {
Rectangle ancestorClientArea = display.map(parent, control, parent.getClientArea());
clipping.intersect(ancestorClientArea);
if (parent instanceof Shell) {
break;
}
}
}
}

void initCairo() {
Expand Down
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