org.eclipse.jface.viewers.ColumnViewerEditorActivationStrategy Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2006, 2007 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
* Tom Schindl - initial API and implementation
* - fix for bug 187817
*******************************************************************************/
package org.eclipse.jface.viewers;
import java.io.Serializable;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.events.MouseEvent;
/**
* This class is responsible to determine if a cell selection event is triggers
* an editor activation. Implementors can extend and overwrite to implement
* custom editing behavior
*
* @since 1.2
*/
public class ColumnViewerEditorActivationStrategy implements Serializable {
private ColumnViewer viewer;
private KeyListener keyboardActivationListener;
/**
* @param viewer
* the viewer the editor support is attached to
*/
public ColumnViewerEditorActivationStrategy(ColumnViewer viewer) {
this.viewer = viewer;
}
/**
* @param event
* the event triggering the action
* @return true if this event should open the editor
*/
protected boolean isEditorActivationEvent(
ColumnViewerEditorActivationEvent event) {
boolean singleSelect = ((IStructuredSelection)viewer.getSelection()).size() == 1;
boolean isLeftMouseSelect = event.eventType == ColumnViewerEditorActivationEvent.MOUSE_CLICK_SELECTION && ((MouseEvent)event.sourceEvent).button == 1;
return singleSelect && (isLeftMouseSelect
|| event.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC
|| event.eventType == ColumnViewerEditorActivationEvent.TRAVERSAL);
}
/**
* @return the cell holding the current focus
*/
private ViewerCell getFocusCell() {
return viewer.getColumnViewerEditor().getFocusCell();
}
/**
* @return the viewer
*/
public ColumnViewer getViewer() {
return viewer;
}
/**
* Enable activation of cell editors by keyboard
*
* @param enable
* true to enable
*/
public void setEnableEditorActivationWithKeyboard(boolean enable) {
if (enable) {
if (keyboardActivationListener == null) {
keyboardActivationListener = new KeyListener() {
public void keyPressed(KeyEvent e) {
ViewerCell cell = getFocusCell();
if (cell != null) {
viewer
.triggerEditorActivationEvent(new ColumnViewerEditorActivationEvent(
cell, e));
}
}
public void keyReleased(KeyEvent e) {
}
};
viewer.getControl().addKeyListener(keyboardActivationListener);
}
} else {
if (keyboardActivationListener != null) {
viewer.getControl().removeKeyListener(
keyboardActivationListener);
keyboardActivationListener = null;
}
}
}
}