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[Win32] Avoid faulty setting of image list at OS on Tree.setOrientation #3077

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[Win32] Avoid faulty setting of image list at OS on Tree.setOrientation #3077

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8 changes: 6 additions & 2 deletions bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Tree.java
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Original file line number Diff line number Diff line change
Expand Up @@ -5805,8 +5805,12 @@ void updateOrientation () {
}
}
}
long hImageList = imageList.getHandle(getAutoscalingZoom());
OS.SendMessage (handle, OS.TVM_SETIMAGELIST, OS.TVSIL_NORMAL, hImageList);
// Image list is only set at OS when the first column contains images,
// thus check if an image list is set at the OS to refresh and otherwise skip it
if (OS.SendMessage (handle, OS.TVM_GETIMAGELIST, OS.TVSIL_NORMAL, 0) != 0) {
long hImageList = imageList.getHandle(getAutoscalingZoom());
OS.SendMessage (handle, OS.TVM_SETIMAGELIST, OS.TVSIL_NORMAL, hImageList);
}
}
if (hwndHeader != 0) {
if (headerImageList != null) {
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