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/**
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*
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*/
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package eu.etaxonomy.taxeditor.view;
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import org.eclipse.jface.viewers.ISelection;
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import org.eclipse.jface.viewers.IStructuredSelection;
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import org.eclipse.swt.widgets.Composite;
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import org.eclipse.swt.widgets.Display;
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import org.eclipse.ui.IEditorPart;
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import org.eclipse.ui.IWorkbenchPart;
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import eu.etaxonomy.taxeditor.editor.ISecuredEditor;
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import eu.etaxonomy.taxeditor.model.AbstractUtility;
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import eu.etaxonomy.taxeditor.model.IDirtyMarkable;
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import eu.etaxonomy.taxeditor.workbench.part.ISelectionElementEditingPart;
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/**
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* <p>
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* Abstract AbstractCdmEditorViewPart class.
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* </p>
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*
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* @author n.hoffmann
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* @created Sep 21, 2010
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* @version 1.0
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*/
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public abstract class AbstractCdmEditorViewPart extends AbstractCdmViewPart implements ISelectionElementEditingPart {
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private DelaySelection delaySelection = null;
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/**
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* This is the monitor for the DelaySelection runnable.
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* If it is <code>true</code> then it is currently delaying a selection.
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*/
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private boolean isInDelay;
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protected Object selectionProvidingPart;
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/**
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* This class invokes internal_selectionChanged() in a separate thread.
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* This allows an asynchronous and/or delayed handling of selection changes
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*/
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private class DelaySelection implements Runnable{
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private IWorkbenchPart part;
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private ISelection selection;
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public DelaySelection(IWorkbenchPart part, ISelection selection) {
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super();
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this.part = part;
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this.selection = selection;
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}
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@Override
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public void run() {
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try{
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selectionChanged_internal(part, selection);
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}
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finally{
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isInDelay = false;
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}
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}
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public synchronized void setSelection(ISelection selection) {
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this.selection = selection;
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}
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public synchronized void setPart(IWorkbenchPart part) {
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this.part = part;
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}
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}
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/**
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* Handle selection change events here and <b>not</b> in
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* {@link AbstractCdmEditorViewPart#selectionChanged(IWorkbenchPart, ISelection)}
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* if you want asynchronous selection handling.
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* @param part The workbench part that has issued the selection change
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* @param selection the new selection
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*/
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protected abstract void selectionChanged_internal(IWorkbenchPart part, ISelection selection);
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/** {@inheritDoc} */
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@Override
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public void selectionChanged(IWorkbenchPart part, ISelection selection) {
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/*to avoid widget is disposed exceptions
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if(getViewer().getControl().isDisposed()){
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return;
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}*/
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if(delaySelection==null){
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delaySelection = new DelaySelection(part, selection);
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}
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delaySelection.setPart(part);
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delaySelection.setSelection(selection);
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if(!isInDelay){
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isInDelay = true;
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Display.getCurrent().asyncExec(delaySelection);
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void showViewer(Object part, IStructuredSelection selection) {
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super.showViewer(part, selection);
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selectionProvidingPart = part;
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}
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@Override
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public Object getSelectionProvidingPart() {
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return selectionProvidingPart;
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}
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/** {@inheritDoc} */
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@Override
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public void createPartControl(Composite parent) {
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super.createPartControl(parent);
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isInDelay = false;
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}
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/**
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* <p>
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* getEditor
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* </p>
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*
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* @return the currently active editor
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*/
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public IEditorPart getEditor() {
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return AbstractUtility.getActiveEditor();
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void showEmptyPage() {
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selectionProvidingPart = null;
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super.showEmptyPage();
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}
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/** {@inheritDoc} */
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@Override
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public void setFocus() {
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super.setFocus();
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if(getEditor() != null && ISecuredEditor.class.isAssignableFrom(getEditor().getClass())){
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boolean doEnable = ((ISecuredEditor)getEditor()).permissionsSatisfied();
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setEnabled(doEnable);
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void dispose() {
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selectionProvidingPart = null;
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super.dispose();
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}
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/** {@inheritDoc} */
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@Override
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public void changed(Object object) {
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if(part instanceof IDirtyMarkable){
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((IDirtyMarkable) part).changed(object);
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}
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else {
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IEditorPart editor = getEditor();
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if (editor != null && editor instanceof IDirtyMarkable) {
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((IDirtyMarkable) editor).changed(object);
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}
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}
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}
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}
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