在SWT?3.3中弹出的对话框比如确认对话框,可以通过Tab键在对话框按钮之间来回选择,但是无法通过键盘方向键来选择,这就让Windows的爱好者很不习惯,其实我自己使用起来也不习惯。 <!--endfragment-->
? 其实让SWT的对话框支持方向键选择有好几种方案
?
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? A方案:将平台迁移到Eclipse?3.4+，这个方法在SWT?3.4+中解决了
??B方案:可以自己实现这个功能！
??我们可以继承 org.eclipse.jface.dialogs.MessageDialog ?这个类,比如就叫MessageDialog2,然后重写父类中的 createButtonsForButtonBar(Composite?parent) ?方法,比如可以参考我的实现方法：
?
protected
?
void
?createButtonsForButtonBar(Composite?parent)?{
???? super .createButtonsForButtonBar(parent);
???? int ?columns? = ?((GridLayout)?parent.getLayout()).numColumns;
???? if (columns? < ? 2 )
?????? return ;
???? for ?( int ?i? = ? 0 ;?i? < ?columns;?i ++ )?{
??????Button?button? = ?getButton(i);
?????? int ?index? = ?(i? + ? 1 ? < ?columns? ? ?i? + ? 1 ?:?i - 1 );
?????? final ?Button?otherButton? = ?getButton(index);
??????button.addKeyListener( new ?KeyAdapter()?{
???????? public ? void ?keyPressed(KeyEvent?e)?{
?????????? if ?(e.keyCode? == ?SWT.ARROW_RIGHT? || ?e.keyCode? == ?SWT.ARROW_LEFT)?{
????????????otherButton.setFocus();
??????????}
????????}
??????});
????}
??}
???? super .createButtonsForButtonBar(parent);
???? int ?columns? = ?((GridLayout)?parent.getLayout()).numColumns;
???? if (columns? < ? 2 )
?????? return ;
???? for ?( int ?i? = ? 0 ;?i? < ?columns;?i ++ )?{
??????Button?button? = ?getButton(i);
?????? int ?index? = ?(i? + ? 1 ? < ?columns? ? ?i? + ? 1 ?:?i - 1 );
?????? final ?Button?otherButton? = ?getButton(index);
??????button.addKeyListener( new ?KeyAdapter()?{
???????? public ? void ?keyPressed(KeyEvent?e)?{
?????????? if ?(e.keyCode? == ?SWT.ARROW_RIGHT? || ?e.keyCode? == ?SWT.ARROW_LEFT)?{
????????????otherButton.setFocus();
??????????}
????????}
??????});
????}
??}
?
?? 然后在MessageDialog2方法重写 openQuestion(Shell?parent,?String?title,?String?message) 方法,
参考实现： ? ???
?
public
?
static
?
boolean
?openQuestion(Shell?parent,?String?title,?String?message,?
boolean
?defaultTrue)?{
????MessageDialog2?dialog? = ? new ?MessageDialog2(UIUtil.getActiveShell(),?title,? null ,?message,?QUESTION,? new ?String[]?{
????????IDialogConstants.YES_LABEL,?IDialogConstants.NO_LABEL?},?defaultTrue? ? ? 0 ?:? 1 );
???? return ?dialog.open()? == ? 0 ;
??}
????MessageDialog2?dialog? = ? new ?MessageDialog2(UIUtil.getActiveShell(),?title,? null ,?message,?QUESTION,? new ?String[]?{
????????IDialogConstants.YES_LABEL,?IDialogConstants.NO_LABEL?},?defaultTrue? ? ? 0 ?:? 1 );
???? return ?dialog.open()? == ? 0 ;
??}
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上面方法的defaultTrue是指焦点是否默认在"确认"按钮上面。
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使用方法：
<!--endfragment-->
MessageDialog2.openQuestion(getShell(),”确认操作”,”是否要执行XX操作
?
”,
false
);