调色板拖放实现

yGEF--调色板拖拽的实现

1.调色板添加内容格式new NodeCreateFactory(Industry.class)
controlGroup.add(new CombinedTemplateCreationEntry("行业", "rer", new NodeCreateFactory(Industry.class), null, null));
2. NodeCreateFactory 代码
package lxgef.editor.commmand;

import lxgef.editor.model.Industry;
import lxgef.editor.model.Programmer;

import org.eclipse.gef.requests.CreationFactory;

public class NodeCreateFactory implements yCreationFactory{
private Class<?> template;
public  NodeCreateFactory(Class<?> t) {
// TODO Auto-generated constructor stub
this.template=t;
}
@Override
public Object getNewObject() {
// TODO Auto-generated method stub
if(template==Programmer.class){
Programmer pro=new Programmer();
pro.setName("前端");
return pro;
}
if(template ==Industry.class){
Industry in=new Industry();
in.setJob("前端");
return in;
}
return null;
}

@Override
public Object getObjectType() {
// TODO Auto-generated method stub
return template;
}

}
3. 在根控制器加入策略
installEditPolicy(EditPolicy.LAYOUT_ROLE, new AppLayoutPolicy());
重新事件监听函数改变后的执行
@Override
 public void propertyChange(PropertyChangeEvent evt){
 if(evt.getPropertyName().equals(Node.PROPERTY_LAYOUT)){
 
 refreshVisuals();
 }
 if(evt.getPropertyName().equals(Node.PROPERTY_ADD)){
 refreshChildren();
 }
 if(evt.getPropertyName().equals(Node.PROPERTY_REMOVE)){
 refreshChildren();
 }
 }
4. 在 ApplayoutPolicy类中添加
ProgrammerPart为最外层控制器 IndustryCreateCommand 生成你所需的内容
@Override
protected Command getCreateCommand(CreateRequest request) {
// TODO Auto-generated method stub
if(request.getType() == REQ_CREATE && getHost() instanceof ProgrammerPart) {
IndustryCreateCommand cmd = new IndustryCreateCommand();
cmd.setProgrammer(getHost().getModel());
cmd.setIndustry(request.getNewObject());

Rectangle constraint = (Rectangle)getConstraintFor(request);
constraint.x = (constraint.x < 0) ? 0 : constraint.x;
constraint.y = (constraint.y < 0) ? 0 : constraint.y;
constraint.width = (constraint.width <= 0) ?
100 : constraint.width;
constraint.height = (constraint.height <= 0) ?
100 : constraint.height;
cmd.setLayout(constraint);

return cmd;
}
return null;

}

5.IndustryCreateCommand 类具体实现
package lxgef.editor.commmand;

import lxgef.editor.model.Industry;
import lxgef.editor.model.Programmer;

import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.commands.Command;

public class IndustryCreateCommand extends Command {
private Industry indus;
private Programmer pro;
public IndustryCreateCommand(){
super();
indus=null;
pro=null;
}
public void setIndustry(Object s){
if(s instanceof Industry){
this.indus=(Industry)s;
}
}
public void setProgrammer(Object s){
if(s instanceof Programmer){
this.pro=(Programmer)s;
}
}
public void setLayout(Rectangle r) {
if(indus == null) {
return ;
}
indus.setLayout(r);
}

@Override
public boolean canExecute() {
if(indus == null ||pro==null) {
return false;
}
return true;
}

@Override
public void execute() {
pro.addChild(indus);
}
@Override
public boolean canUndo() {
if (pro == null || indus == null)
return false;
return pro.contains(indus);
}

@Override
public void undo() {
pro.removeChild(indus);
}

}
最后执行execute增加子元素
6.根模型增加子元素放法，firePropertyChange会执行part中propertyChange方法刷新子元素
public boolean addChild(Node child) {
boolean b=this.children.add(child);
if(b){
child.setParent(this);
getListeners().firePropertyChange(PROPERTY_ADD, null, child);
}

return b;
}
最终效果图：

图片：3A$2YHUHN`YN`$WI`O([N8U.png

[img]file:///C:\Users\zhou\AppData\Roaming\Tencent\Users\846297343\QQ\WinTemp\RichOle\3A$2YHUHN`YN`$WI`O([N8U.png[/img]