/*
* Copyright 2011 Gaurav Saxena < gsaxena81 AT gmail.com >
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.vk.gwt.designer.client.designer;
import java.util.ArrayList;
import java.util.List;
import com.google.gwt.event.dom.client.MouseDownEvent;
import com.google.gwt.event.dom.client.MouseDownHandler;
import com.google.gwt.event.dom.client.MouseMoveEvent;
import com.google.gwt.event.dom.client.MouseMoveHandler;
import com.google.gwt.event.dom.client.MouseUpEvent;
import com.google.gwt.event.dom.client.MouseUpHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.AbsolutePanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.Widget;
import com.vk.gwt.designer.client.api.component.IVkPanel;
import com.vk.gwt.designer.client.ui.panel.vkAbsolutePanel.VkAbsolutePanel;
public class GroupSelectHandler {
private static GroupSelectHandler groupHandler = new GroupSelectHandler();
private PopupPanel groupingBoundsWidget;
private List<Widget> selectedWidgets;
private GroupSelectHandler(){
groupingBoundsWidget = new PopupPanel();
groupingBoundsWidget.setWidget(new HTML());
groupingBoundsWidget.setStyleName("none");
groupingBoundsWidget.getWidget().setStyleName("vk-grouping-widget");
groupingBoundsWidget.hide();
selectedWidgets = new ArrayList<Widget>();
}
public static GroupSelectHandler getInstance(){
return groupHandler;
}
public void addGroupSelectionHandler(final VkAbsolutePanel panel){
panel.addDomHandler(new MouseDownHandler(){
@Override
public void onMouseDown(MouseDownEvent event) {
VkDesignerUtil.setCapture(panel);
groupingBoundsWidget.setPopupPosition(event.getClientX() - panel.getAbsoluteLeft() + Window.getScrollLeft(), event.getClientY() - panel.getAbsoluteTop() + Window.getScrollTop());
groupingBoundsWidget.show();
selectedWidgets.clear();
}}, MouseDownEvent.getType());
panel.addDomHandler(new MouseMoveHandler(){
@Override
public void onMouseMove(MouseMoveEvent event) {
groupingBoundsWidget.setHeight(event.getClientY() - groupingBoundsWidget.getAbsoluteTop() + "px");
groupingBoundsWidget.setWidth(event.getClientX() - groupingBoundsWidget.getAbsoluteLeft() + "px");
}}, MouseMoveEvent.getType());
panel.addDomHandler(new MouseUpHandler(){
@Override
public void onMouseUp(MouseUpEvent event) {
VkDesignerUtil.releaseCapture(panel);
selectWidgets(panel, groupingBoundsWidget.getAbsoluteTop(), groupingBoundsWidget.getAbsoluteLeft()
, groupingBoundsWidget.getAbsoluteTop() + groupingBoundsWidget.getOffsetHeight(), groupingBoundsWidget.getAbsoluteLeft() + groupingBoundsWidget.getOffsetWidth());
groupingBoundsWidget.hide();
}}, MouseUpEvent.getType());
}
private void selectWidgets(AbsolutePanel panel, int top, int left, int bottom, int right) {
IVkPanel iVkPanel = (IVkPanel)panel;
for(Widget i : iVkPanel){
if(isWidgetBound(i, top, left, bottom, right))
selectedWidgets.add(i);
}
}
private boolean isWidgetBound(Widget widget, int top, int left, int bottom, int right) {
int widgetTop = widget.getAbsoluteTop() + Window.getScrollTop();
int widgetBottom = widgetTop + widget.getOffsetHeight();
int widgetLeft = widget.getAbsoluteLeft() + Window.getScrollLeft();
int widgetRight = widgetLeft + widget.getOffsetWidth();
if(widgetTop > top && widgetBottom < bottom && widgetLeft > left && widgetRight < right)
return true;
else
return false;
}
public List<Widget> getSelectedWidgets() {
return selectedWidgets;
}
}