/*******************************************************************************
* Copyright (c) 2007, 2015 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
* Lars Vogel <Lars.Vogel@vogella.com> - Bug 414565, 475361
* Jeanderson Candido <http://jeandersonbc.github.io> - Bug 414565
******************************************************************************/
package org.eclipse.jface.snippets.viewers;
import java.util.ArrayList;
import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
/**
* @since 3.3
*
*/
public abstract class AbstractCellCursor extends Canvas {
private ViewerCell[] cells = new ViewerCell[0];
private ColumnViewer viewer;
private int activationTime = 0;
private boolean inFocusRequest = false;
/**
* @param viewer
* @param style
*/
public AbstractCellCursor(ColumnViewer viewer, int style) {
super((Composite) viewer.getControl(), style);
this.viewer = viewer;
Listener listener = createListener();
int[] eventsToListen = { SWT.Paint, SWT.KeyDown, SWT.MouseDown,
SWT.MouseDoubleClick };
for (int event : eventsToListen) {
addListener(event, listener);
}
getParent().addListener(SWT.FocusIn, listener);
}
private Listener createListener() {
return new Listener() {
@Override
public void handleEvent(Event event) {
switch (event.type) {
case SWT.Paint:
paint(event);
break;
case SWT.KeyDown:
getParent().notifyListeners(SWT.KeyDown, event);
ArrayList<Object> list = new ArrayList<>();
for (ViewerCell cell : cells) {
list.add(cell.getElement());
}
AbstractCellCursor.this.viewer
.setSelection(new StructuredSelection(list));
break;
case SWT.MouseDown:
if (event.time < activationTime) {
Event cEvent = copyEvent(event);
cEvent.type = SWT.MouseDoubleClick;
getParent().notifyListeners(SWT.MouseDoubleClick,
cEvent);
} else {
getParent().notifyListeners(SWT.MouseDown,
copyEvent(event));
}
break;
case SWT.MouseDoubleClick:
getParent().notifyListeners(SWT.MouseDoubleClick,
copyEvent(event));
break;
case SWT.FocusIn:
if (isVisible()) {
inFocusRequest = true;
if (!inFocusRequest) {
forceFocus();
}
inFocusRequest = false;
}
default:
break;
}
}
};
}
/**
* @param cell
* @param eventTime
*/
public void setSelection(ViewerCell cell, int eventTime) {
this.cells = new ViewerCell[] { cell };
setBounds(cell.getBounds());
forceFocus();
redraw();
activationTime = eventTime + getDisplay().getDoubleClickTime();
}
/**
* @return the cells who should be highlighted
*/
protected ViewerCell[] getSelectedCells() {
return cells;
}
private Event copyEvent(Event event) {
Event cEvent = new Event();
cEvent.button = event.button;
cEvent.character = event.character;
cEvent.count = event.count;
cEvent.data = event.data;
cEvent.detail = event.detail;
cEvent.display = event.display;
cEvent.doit = event.doit;
cEvent.end = event.end;
cEvent.gc = event.gc;
cEvent.height = event.height;
cEvent.index = event.index;
cEvent.item = getSelectedCells()[0].getControl();
cEvent.keyCode = event.keyCode;
cEvent.start = event.start;
cEvent.stateMask = event.stateMask;
cEvent.text = event.text;
cEvent.time = event.time;
cEvent.type = event.type;
cEvent.widget = event.widget;
cEvent.width = event.width;
Point p = viewer.getControl().toControl(toDisplay(event.x, event.y));
cEvent.x = p.x;
cEvent.y = p.y;
return cEvent;
}
/**
* @param event
*/
protected abstract void paint(Event event);
}