我想创建带有提示的文本框,当它为空时。我使用setMessage method并且它工作正常。如何更改提示的默认颜色?
答案 0 :(得分:1)
如果您想更改提示的颜色,只需在焦点事件中添加Listener
即可。
public class StackOverflow
{
public static void main(String[] args)
{
final Display display = new Display();
Shell shell = new Shell(display);
shell.setText("StackOverflow");
shell.setLayout(new GridLayout(1, true));
final Text text = new Text(shell, SWT.BORDER | SWT.SEARCH);
text.setForeground(display.getSystemColor(SWT.COLOR_RED));
text.setText("Enter something");
text.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, true));
text.addListener(SWT.FocusOut, new Listener()
{
@Override
public void handleEvent(Event arg0)
{
if("".equals(text.getText()))
{
text.setForeground(display.getSystemColor(SWT.COLOR_RED));
text.setText("Enter something");
}
}
});
text.addListener(SWT.FocusIn, new Listener()
{
@Override
public void handleEvent(Event arg0)
{
if("Enter something".equals(text.getText()))
{
text.setForeground(display.getSystemColor(SWT.COLOR_BLACK));
text.setText("");
}
}
});
Label label = new Label(shell, SWT.NONE);
label.setFocus();
label.forceFocus();
shell.pack();
shell.open();
while (!shell.isDisposed())
{
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
不聚焦/空:
专注/非空:
如您所见,“提示”现在是红色的。