X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.utils.ui%2Fsrc%2Forg%2Fsimantics%2Futils%2Fui%2Fawt%2FRecursiveContainerListener.java;fp=bundles%2Forg.simantics.utils.ui%2Fsrc%2Forg%2Fsimantics%2Futils%2Fui%2Fawt%2FRecursiveContainerListener.java;h=151734fa0d1c6561ee891a48f0df02ef712ec1e5;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/awt/RecursiveContainerListener.java b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/awt/RecursiveContainerListener.java
new file mode 100644
index 000000000..151734fa0
--- /dev/null
+++ b/bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/awt/RecursiveContainerListener.java
@@ -0,0 +1,101 @@
+/*******************************************************************************
+ * Copyright (c) 2007 SAS Institute.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     SAS Institute - initial API and implementation
+ *******************************************************************************/
+package org.simantics.utils.ui.awt;
+
+import java.awt.Component;
+import java.awt.Container;
+import java.awt.EventQueue;
+import java.awt.event.ContainerEvent;
+import java.awt.event.ContainerListener;
+
+class RecursiveContainerListener implements ContainerListener {
+    private final ContainerListener listener;
+    
+    RecursiveContainerListener(ContainerListener listener) {
+        assert listener != null;
+        
+        this.listener = listener;
+    }
+
+    private void handleAdd(Container source, Component c) {
+        assert source != null;
+        assert c != null;
+        assert listener != null;
+        assert EventQueue.isDispatchThread();    // On AWT event thread
+        
+        // System.out.println("Listening to: " + c);
+        listener.componentAdded(new ContainerEvent(source, ContainerEvent.COMPONENT_ADDED, c));
+        if (c instanceof Container) {
+            ((Container)c).addContainerListener(this);
+        }
+    }
+    
+    private void handleRemove(Container source, Component c) {
+        assert source != null;
+        assert c != null;
+        assert listener != null;
+        assert EventQueue.isDispatchThread();    // On AWT event thread
+
+        // System.out.println("Stopped Listening to: " + c);
+        listener.componentRemoved(new ContainerEvent(source, ContainerEvent.COMPONENT_REMOVED, c));
+        if (c instanceof Container) {
+            ((Container)c).removeContainerListener(this);
+        }
+    }
+    
+    private void handleAllAdds(Container source, Component child) {
+        assert source != null;
+        assert child != null;
+        assert EventQueue.isDispatchThread();    // On AWT event thread
+
+        if (child instanceof Container) {
+            Container container = (Container)child;
+            Component[] children = container.getComponents();
+            for (int i = 0; i < children.length; i++) {
+                handleAllAdds(container, children[i]);
+            }
+        }
+        handleAdd(source, child);
+    }
+    
+    private void handleAllRemoves(Container source, Component child) {
+        assert source != null;
+        assert child != null;
+        assert EventQueue.isDispatchThread();    // On AWT event thread
+
+        if (child instanceof Container) {
+            Container container = (Container)child;
+            Component[] children = container.getComponents();
+            for (int i = 0; i < children.length; i++) {
+                handleAllRemoves(container, children[i]);
+            }
+        }
+        handleRemove(source, child);
+
+    }
+
+    public void componentAdded(ContainerEvent e) {
+        assert e != null;
+        assert EventQueue.isDispatchThread();    // On AWT event thread
+        
+        Container source = (Container)e.getSource();
+        handleAllAdds(source, e.getChild());
+    }
+    
+    public void componentRemoved(ContainerEvent e) {
+        assert e != null;
+        assert EventQueue.isDispatchThread();    // On AWT event thread
+        
+        Container source = (Container)e.getSource();
+        handleAllRemoves(source, e.getChild());
+    }
+}
+