/*******************************************************************************
* Copyright 2011 Google Inc. All Rights Reserved.
*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package com.google.gdt.eclipse.designer.gwtext.gef.policy;
import com.google.common.collect.Lists;
import com.google.gdt.eclipse.designer.gwtext.gef.part.ColumnConfigEditPart;
import com.google.gdt.eclipse.designer.gwtext.model.widgets.ColumnConfigInfo;
import org.eclipse.wb.core.gef.command.EditCommand;
import org.eclipse.wb.core.gef.figure.TextFeedback;
import org.eclipse.wb.draw2d.Figure;
import org.eclipse.wb.draw2d.FigureUtils;
import org.eclipse.wb.draw2d.IColorConstants;
import org.eclipse.wb.draw2d.IPositionConstants;
import org.eclipse.wb.draw2d.RectangleFigure;
import org.eclipse.wb.draw2d.geometry.Rectangle;
import org.eclipse.wb.gef.core.Command;
import org.eclipse.wb.gef.core.requests.ChangeBoundsRequest;
import org.eclipse.wb.gef.core.requests.Request;
import org.eclipse.wb.gef.graphical.handles.Handle;
import org.eclipse.wb.gef.graphical.handles.MoveHandle;
import org.eclipse.wb.gef.graphical.handles.SideResizeHandle;
import org.eclipse.wb.gef.graphical.policies.SelectionEditPolicy;
import org.eclipse.wb.gef.graphical.tools.ResizeTracker;
import java.util.List;
/**
* {@link SelectionEditPolicy} for {@link ColumnConfigEditPart}.
*
* @author scheglov_ke
* @author sablin_aa
* @coverage GWTExt.gef.policy
*/
public final class ColumnConfigSelectionEditPolicy extends SelectionEditPolicy {
private static final String REQ_RESIZE = "resize";
private final ColumnConfigInfo m_column;
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public ColumnConfigSelectionEditPolicy(ColumnConfigInfo column) {
m_column = column;
}
////////////////////////////////////////////////////////////////////////////
//
// Handles
//
////////////////////////////////////////////////////////////////////////////
@Override
protected List<Handle> createSelectionHandles() {
List<Handle> handles = Lists.newArrayList();
// create move column handle
MoveHandle moveHandle = new MoveHandle(getHost());
moveHandle.setForeground(IColorConstants.red);
handles.add(moveHandle);
//
return handles;
}
@Override
protected List<Handle> createStaticHandles() {
List<Handle> handles = Lists.newArrayList();
// create resize column handle
SideResizeHandle resizeHandle =
new SideResizeHandle(getHost(), IPositionConstants.RIGHT, 10, true);
resizeHandle.setDragTrackerTool(new ResizeTracker(getHost(),
IPositionConstants.EAST,
REQ_RESIZE));
handles.add(resizeHandle);
//
return handles;
}
////////////////////////////////////////////////////////////////////////////
//
// Routing
//
////////////////////////////////////////////////////////////////////////////
@Override
public boolean understandsRequest(Request request) {
return super.understandsRequest(request) || request.getType() == REQ_RESIZE;
}
@Override
public Command getCommand(final Request request) {
return getResizeCommand((ChangeBoundsRequest) request);
}
@Override
public void showSourceFeedback(Request request) {
showResizeFeedback((ChangeBoundsRequest) request);
}
@Override
public void eraseSourceFeedback(Request request) {
eraseResizeFeedback((ChangeBoundsRequest) request);
}
////////////////////////////////////////////////////////////////////////////
//
// Resize
//
////////////////////////////////////////////////////////////////////////////
private Figure m_resizeFeedback;
private TextFeedback m_textFeedback;
//
private Command getResizeCommand(ChangeBoundsRequest request) {
final Rectangle newBounds = request.getTransformedRectangle(getHostFigure().getBounds());
return new EditCommand(m_column) {
@Override
protected void executeEdit() throws Exception {
int newWidth = Math.max(newBounds.width, 0);
m_column.setWidth(newWidth);
}
};
}
private void showResizeFeedback(ChangeBoundsRequest request) {
if (m_resizeFeedback == null) {
// create selection feedback
{
m_resizeFeedback = new RectangleFigure();
m_resizeFeedback.setForeground(IColorConstants.red);
addFeedback(m_resizeFeedback);
}
// create text feedback
{
m_textFeedback = new TextFeedback(getFeedbackLayer());
m_textFeedback.add();
}
}
// prepare bounds
Rectangle bounds;
{
Figure hostFigure = getHostFigure();
bounds = request.getTransformedRectangle(hostFigure.getBounds());
FigureUtils.translateFigureToAbsolute(hostFigure, bounds.shrink(-1, -1));
}
// update selection feedback
m_resizeFeedback.setBounds(bounds);
// update text feedback
int newWidth = Math.max(bounds.width - 2, 0);
m_textFeedback.setText(Integer.toString(newWidth));
m_textFeedback.setLocation(request.getLocation().getTranslated(10, 10));
}
private void eraseResizeFeedback(ChangeBoundsRequest request) {
// erase selection feedback
removeFeedback(m_resizeFeedback);
m_resizeFeedback = null;
// erase text feedback
m_textFeedback.remove();
m_textFeedback = null;
}
}