之前给结点设置图片都不能保存,下次打开后还是原来的图片。接下来就是实现永久保存,其实就是给Shape结点所对应的模型元素添加一个属性ID,这个ID的值在创建模型时确定,并且,我们选择图片后将图片复制到一个确定的文件夹下,图片名就是ID名。
1、给AbstractShape模型添加属性ID:修改工程org.eclipse.myTest.shapes下的models下的shapes.ecore_diagram,这样它所对应的shapes.ecore文件也会改变,为AbstractShape添加属性ID,类型是EString,具体操作参考GMF之Shapes实例Part1。
2、保存shapes.ecore_diagram,删除shapes.genmodel,重新创建一个shapes.genmodel,类似GMF之Shapes实例Part1中,别忘了设置Base Package为org.eclipse.myTest,然后重新生成Model Code、Edit Code和Editor Code,参考GMF之Shapes实例Part1。
3、在工程org.eclipse.myTest.shapes下的org.eclipse.myTest.shapes.util下新建一个类,用于产生一个全局唯一的ID:
package org.eclipse.myTest.shapes.util;
import java.util.UUID;
public class GUID {
/**
* 功能:产生一个全局唯一的ID
*/
public static final String GenerateGUID() {
UUID uuid = UUID.randomUUID();
return uuid.toString();
}
}
4、在工程org.eclipse.myTest.shapes中的org.eclipse.myTest.shapes.impl包中的AbstractShapeImpl类中修改其构造函数为:
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated NOT 构造函数,设置ID
*/
protected AbstractShapeImpl() {
super();
this.setID(GUID.GenerateGUID());
}
5、在ReserveShape1EditPart中添加属性runtimePath和ID,类型都是String:
/**
* @generated NOT
*/
private String runtimePath;
private String ID;
6、修改ReserveShape1EditPart的构造函数:
/**
* @generated NOT
*/
public ReserveShape1EditPart(View view) {
super(view);
runtimePath = Platform.getInstanceLocation().getURL().getPath();
// 设置图片存放的目录为runtimePath\images,如果这个目录不存在则要创建它
runtimePath += "images/";
// 判断文件夹是否存在,不存在创建
File file = new File(runtimePath);
if (!file.isDirectory()) {
file.mkdir();
}
//获得ID
ID=((ReserveShape1)((View) this.getModel()).getElement()).getID();
//判断目录下是否有ID.jpg文件,如果有的话就调用changeImageData
file=new File(runtimePath+ID+".jpg");
if(file.exists()){
changeImageData();
}
}
7、在ReserveShape1EditPart中新建一个方法changeImageData():
/**
* 功能:根据ID创建OrgImageData
*/
public void changeImageData() {
OrgImageData = new ImageData(runtimePath + ID + ".jpg");
}
8、修改ChangeImageAction中doRun函数中if中的代码,添加复制图片的操作如下:
if (selEditPart instanceof ReserveShape1EditPart) {
ReserveShape1EditPart editPart = (ReserveShape1EditPart) selEditPart;
// 获得模型(此处未用到)
ReserveShape1 model = (ReserveShape1) editPart
.resolveSemanticElement();
//将选择的图片拷贝到指定目录下
String runtimePath = Platform.getInstanceLocation().getURL().getPath();
runtimePath += "images/";
runtimePath+=model.getID();
runtimePath+=".jpg";
try {
FileOption.copyFile(imagePath, runtimePath);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return ;
}
// 获得领域模型
TransactionalEditingDomain domain = editPart.getEditingDomain();
// 创建命令
ChangeImageCommand command = new ChangeImageCommand(domain, editPart);
// 执行命令
domain.getCommandStack().execute(command);
}
9、修改ChangeImageAction子类ChangeImageCommand的构造函数,并去掉成员变量imagePath:
public ChangeImageCommand(
TransactionalEditingDomain transactionalEditingDomain,
ReserveShape1EditPart editPart) {
super(transactionalEditingDomain);
this.editPart = editPart;
}
修改其doExecute方法:
protected void doExecute() {
editPart.changeImageData();
editPart.getPrimaryShape().repaint();
}
好了,至此大功告成!
代码下载:http://www.oschina.net/code/snippet_164134_6489
来源:oschina
链接:https://my.oschina.net/u/164134/blog/32961