使用DecoratedField装饰SWT Control

DecoratedField用来实现对Control的装饰，可以为button,combo,text等控件做出如下效果。

控件边上提示的种类有4种，分别是Proposal, Required, error, warning.

代码很简单：

packagejface;

importorg.eclipse.jface.fieldassist.DecoratedField;
importorg.eclipse.jface.fieldassist.FieldDecoration;
importorg.eclipse.jface.fieldassist.FieldDecorationRegistry;
importorg.eclipse.jface.fieldassist.IControlCreator;
importorg.eclipse.jface.layout.GridDataFactory;
importorg.eclipse.swt.SWT;
importorg.eclipse.swt.layout.GridLayout;
importorg.eclipse.swt.widgets.Button;
importorg.eclipse.swt.widgets.Combo;
importorg.eclipse.swt.widgets.Composite;
importorg.eclipse.swt.widgets.Control;
importorg.eclipse.swt.widgets.Display;
importorg.eclipse.swt.widgets.Shell;
importorg.eclipse.swt.widgets.Text;

/***//**
*ThisclassdemonstratesTableViewers
*/
publicclassFieldDecorationDemo...{

publicvoidrun()...{
Displaydisplay=newDisplay();
Shellshell=newShell(display);
shell.setSize(200,200);
shell.setText("ButtonExample");
shell.setLayout(newGridLayout());

createFieldDecoration(shell);

shell.open();
while(!shell.isDisposed())...{
if(!display.readAndDispatch())
display.sleep();
}
display.dispose();
}

privatevoidcreateFieldDecoration(Shellshell)...{
createCombo(shell);
createButton(shell);
createText(shell);
}

privatevoidcreateText(Shellshell)...{
IControlCreatorcbCtrl=newIControlCreator()...{

publicControlcreateControl(finalCompositeparent,finalintstyle)...{
Texttext=newText(parent,style);
text.setText("text");
returntext;
}
};
DecoratedFielddField=newDecoratedField(shell,SWT.BORDER,cbCtrl);
FieldDecorationdecoration=FieldDecorationRegistry.getDefault().getFieldDecoration(FieldDecorationRegistry.DEC_ERROR);
dField.addFieldDecoration(decoration,SWT.LEFT|SWT.TOP,false);
}

privatevoidcreateButton(Shellshell)...{
IControlCreatorcbCtrl=newIControlCreator()...{

publicControlcreateControl(finalCompositeparent,finalintstyle)...{
Buttonbutton=newButton(parent,style);
button.setText("button");
returnbutton;
}
};
DecoratedFielddField=newDecoratedField(shell,SWT.BORDER,cbCtrl);
FieldDecorationdecoration=FieldDecorationRegistry.getDefault().getFieldDecoration(
FieldDecorationRegistry.DEC_CONTENT_PROPOSAL);
dField.addFieldDecoration(decoration,SWT.LEFT|SWT.TOP,false);
}

privatevoidcreateCombo(Shellshell)...{
IControlCreatorcbCtrl=newIControlCreator()...{

publicControlcreateControl(finalCompositeparent,finalintstyle)...{
Combocb=newCombo(parent,style);
cb.setText("combo");
returncb;
}
};
DecoratedFielddField=newDecoratedField(shell,SWT.BORDER,cbCtrl);
FieldDecorationdecoration=FieldDecorationRegistry.getDefault()
.getFieldDecoration(FieldDecorationRegistry.DEC_REQUIRED);
dField.addFieldDecoration(decoration,SWT.RIGHT|SWT.TOP,false);
}

publicstaticvoidmain(String[]args)...{
newFieldDecorationDemo().run();
}
}