Example usage for org.eclipse.jface.viewers TreeExpansionEvent TreeExpansionEvent

Introduction

In this page you can find the example usage for org.eclipse.jface.viewers TreeExpansionEvent TreeExpansionEvent.

Prototype

public TreeExpansionEvent(AbstractTreeViewer source, Object element) 

Source Link

Document

Creates a new event for the given source and element.

Usage

From source file:gov.nasa.ensemble.common.ui.treetable.TreeTableViewer.java

License:Open Source License

@Override
protected void setExpanded(Item node, boolean expand) {
    TreeItem item = (TreeItem) node;//www .ja v a 2 s.co  m
    boolean pre = item.getExpanded();

    item.setExpanded(expand);

    /*
     * See Eclipse Bugzilla Bug 177378 and JIRA MER-176. In summary, the
     * collapseAll() and expandAll() methods filter through this
     * setExpanded() method. However, this path through the system does not
     * notify listeners of the expansion event. Therefore, we added code to
     * notify the listeners if the expansion state changes as a result of a
     * programmatic call (user clicks in the tree do notify the listeners
     * since those expansions take a different path).
     */

    // do not fire the event if the expansion state did not change
    if (pre == expand)
        return;
    TreeExpansionEvent e = new TreeExpansionEvent(this, node.getData());
    if (expand)
        fireTreeExpanded(e);
    else
        fireTreeCollapsed(e);
}

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From source file:org.eclipse.mdht.uml.common.ui.dialogs.SubclassEditorTreeViewer.java

License:Open Source License

/**
 * Handles a tree expand event from the SWT widget.
 *
 * @param event//  w w w.  j  a  va 2 s  .  c  om
 *            the SWT tree event
 */
@Override
protected void handleTreeExpand(TreeEvent event) {
    createChildren(event.item);
    if (event.item.getData() != null) {
        fireTreeExpanded(new TreeExpansionEvent(this, event.item.getData()));
    }
}

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From source file:org.mingy.jsfs.ui.viewer.CTreeComboViewer.java

License:Open Source License

protected void handleTreeExpand(TreeEvent event) {
    if (contentProviderIsLazy) {
        if (event.item.getData() != null) {
            Item[] children = getChildren(event.item);
            if (children.length == 1 && children[0].getData() == null) {
                // we have a dummy child node, ask for an updated child
                // count
                virtualLazyUpdateChildCount(event.item, children.length);
            }//from  ww  w  .j  a va 2 s.co  m
            fireTreeExpanded(new TreeExpansionEvent(this, event.item.getData()));
        }
        return;
    }
    super.handleTreeExpand(event);
}

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