/*******************************************************************************
* 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.gxt.gef.policy;
import com.google.common.collect.Lists;
import com.google.gdt.eclipse.designer.gef.policy.AbstractResizeSelectionEditPolicy;
import com.google.gdt.eclipse.designer.gxt.model.layout.ColumnDataInfo;
import com.google.gdt.eclipse.designer.gxt.model.layout.ColumnLayoutInfo;
import com.google.gdt.eclipse.designer.model.widgets.WidgetInfo;
import org.eclipse.wb.core.gef.command.EditCommand;
import org.eclipse.wb.draw2d.IColorConstants;
import org.eclipse.wb.draw2d.IPositionConstants;
import org.eclipse.wb.gef.graphical.handles.Handle;
import java.util.List;
/**
* {@link SelectionLayoutEditPolicy} for {@link ColumnLayoutInfo}.
*
* @author scheglov_ke
* @coverage ExtGWT.gef.policy
*/
public final class ColumnSelectionEditPolicy extends AbstractResizeSelectionEditPolicy {
private final WidgetInfo m_widget;
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public ColumnSelectionEditPolicy(WidgetInfo widget) {
m_widget = widget;
}
////////////////////////////////////////////////////////////////////////////
//
// Handles
//
////////////////////////////////////////////////////////////////////////////
@Override
protected List<Handle> createSelectionHandles() {
List<Handle> handles = Lists.newArrayList();
handles.add(createResizeHandle(IPositionConstants.EAST, 0.25, IColorConstants.green));
return handles;
}
////////////////////////////////////////////////////////////////////////////
//
// Update
//
////////////////////////////////////////////////////////////////////////////
@Override
protected void updateTooltipCommand() {
// EAST
if (m_resizeDirection == IPositionConstants.EAST) {
final double newWidth = getNewWidth();
m_command = new EditCommand(m_widget) {
@Override
protected void executeEdit() throws Exception {
ColumnLayoutInfo.getColumnData(m_widget).setWidth(newWidth);
}
};
}
}
private double getNewWidth() {
ColumnDataInfo columnData = ColumnLayoutInfo.getColumnData(m_widget);
if (m_ctrlPressed) {
double width = getCurrentPercentWidth(columnData);
width += m_sizeDelta.width / 100.0;
width = roundPercentToFive(width);
//
m_tooltip = "width: " + getPercentString(width) + "\nRelease Ctrl to set width in pixels";
return width;
} else {
double width = m_newSize.width;
width = roundToFive(width);
if (width < 0) {
width = 0;
}
//
m_tooltip = "width: " + (int) width + "\nPress Ctrl to set width in percents";
return width;
}
}
private double getCurrentPercentWidth(ColumnDataInfo columnData) {
double width = columnData.getWidth();
if (width < 0 || width > 1) {
width = (double) getHostFigure().getSize().width / getParentWidth();
}
return width;
}
private static String getPercentString(double width) {
return (int) (width * 100) + "%";
}
private static double roundPercentToFive(double value) {
value = Math.max(value, 0.0);
value = Math.min(value, 1.0);
value *= 100;
value = roundToFive(value);
value /= 100;
return value;
}
private static double roundToFive(double value) {
return (int) value / 5 * 5;
}
}