[Bug 29779] BIDI: lack of ability to change orientation of widget in runtime

1 files changed, 56 insertions, 0 deletions

diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Control.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Control.java
index e72bcc9cd8..a550d916b1 100755
--- a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Control.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/Control.java
@@ -1426,6 +1426,24 @@ public Monitor getMonitor () {
 }
 
 /**
+ * Returns the orientation of the receiver, which will be one of the
+ * constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>.
+ *
+ * @return the orientation style
+ * 
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ * 
+ * @since 3.7
+ */
+public int getOrientation () {
+	checkWidget ();
+	return style & (SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT);
+}
+
+/**
  * Returns the receiver's parent, which must be a <code>Composite</code>
  * or null when the receiver is a shell that was created with null or
  * a display for a parent.
@@ -3247,6 +3265,33 @@ public void setMenu (Menu menu) {
 	this.menu = menu;
 }
 
+/**
+ * Sets the orientation of the receiver, which must be one
+ * of the constants <code>SWT.LEFT_TO_RIGHT</code> or <code>SWT.RIGHT_TO_LEFT</code>.
+ * <p>
+ *
+ * @param orientation new orientation style
+ * 
+ * @exception SWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ * 
+ * @since 3.7
+ */
+public void setOrientation (int orientation) {
+	checkWidget ();
+	if (OS.IsWinCE) return;
+	if (OS.WIN32_VERSION < OS.VERSION (4, 10)) return;
+	int flags = SWT.RIGHT_TO_LEFT | SWT.LEFT_TO_RIGHT;
+	if ((orientation & flags) == 0 || (orientation & flags) == flags) return;
+	style &= ~SWT.MIRRORED;
+	style &= ~flags;
+	style |= orientation & flags;
+	updateOrientation ();
+	checkMirrored ();
+}
+
 boolean setRadioFocus (boolean tabbing) {
 	return false;
 }
@@ -4143,6 +4188,17 @@ void updateLayout (boolean resize, boolean all) {
 	/* Do nothing */
 }
 
+void updateOrientation () {
+	int bits  = OS.GetWindowLong (handle, OS.GWL_EXSTYLE);
+	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
+		bits |= OS.WS_EX_LAYOUTRTL;
+	} else {
+		bits &= ~OS.WS_EX_LAYOUTRTL;
+	}
+	OS.SetWindowLong (handle, OS.GWL_EXSTYLE, bits);
+	OS.InvalidateRect (handle, null, true);
+}
+
 CREATESTRUCT widgetCreateStruct () {
 	return null;
 }