给自定义Dialog加入保留对话框值的功能
有的时候我们需要这样的功能,记下Dialog中的值,当再次打开这个Dialog的时候,还原这些值。这就需要把这些Dialog的值保存起来。Dialog的IDialogSettings类提供了这个功能。下边是使用方法:在上例"自定义Dialog"的代码上加入三个函数:
public void saveState(){
if (text.getText() == null || text.getText().equals("")){
return ;
}
IDialogSettings topSettings = getTopSettings();
IDialogSettings settings = topSettings.getSection("TestDialog");
if(settings == null)settings = topSettings.addNewSection("TestDialog");
settings.put("value", text.getText());
try{
topSettings.save("content/system.xml");
}catch(IOException e){
System.out.println(e.getMessage());
}
}
public void restoreState(){
IDialogSettings topSettings = getTopSettings();
IDialogSettings settings = topSettings.getSection("TestDialog");
if(settings == null) return;
if (text.getText() == null || text.getText().equals("")){
text.setText(settings.get("value"));
}
}
public IDialogSettings getTopSettings(){
IDialogSettings topSettings = new DialogSettings("system");
try{
topSettings.load("content/system.xml");
}catch(IOException e){
System.out.println(e.getMessage());
}
return topSettings;
}
if (text.getText() == null || text.getText().equals("")){
return ;
}
IDialogSettings topSettings = getTopSettings();
IDialogSettings settings = topSettings.getSection("TestDialog");
if(settings == null)settings = topSettings.addNewSection("TestDialog");
settings.put("value", text.getText());
try{
topSettings.save("content/system.xml");
}catch(IOException e){
System.out.println(e.getMessage());
}
}
public void restoreState(){
IDialogSettings topSettings = getTopSettings();
IDialogSettings settings = topSettings.getSection("TestDialog");
if(settings == null) return;
if (text.getText() == null || text.getText().equals("")){
text.setText(settings.get("value"));
}
}
public IDialogSettings getTopSettings(){
IDialogSettings topSettings = new DialogSettings("system");
try{
topSettings.load("content/system.xml");
}catch(IOException e){
System.out.println(e.getMessage());
}
return topSettings;
}
然后在覆写的buttonPressed函数中调用save
protected void buttonPressed(int button){
saveState();
}
在createDialogArea函数中加入取出数据saveState();
}
protected Control createDialogArea(Composite parent) {
Composite container = (Composite) super.createDialogArea(parent);
container.setLayout(new RowLayout());
text = new Text(container, SWT.BORDER);
text.setLayoutData(new RowData(100,-1));
//加入这一句
if (text.getText() == null || text.getText().equals("")){
restoreState();
}
return container;
}
最后,记得建立需要的文件,在当前workspace下建立文件夹content,然后在文件夹下建立system.xml文件。当然你也可以利用程序来实现。Composite container = (Composite) super.createDialogArea(parent);
container.setLayout(new RowLayout());
text = new Text(container, SWT.BORDER);
text.setLayoutData(new RowData(100,-1));
//加入这一句
if (text.getText() == null || text.getText().equals("")){
restoreState();
}
return container;
}
运行一下看看吧,是不是记住了上次填入的内容.
SourceCODE