强制显示Java工具提示 [英] Force a Java Tooltip to Appear

问题描述

给出一个 JTextField (或与此有关的任何 JComponent )，如何迫使该组件的指定工具提示出现而用户没有任何直接输入事件?换句话说，为什么没有 JComponent.setTooltipVisible(boolean)?

Given a JTextField (or any JComponent for that matter), how would one go about forcing that component's designated tooltip to appear, without any direct input event from the user? In other words, why is there no JComponent.setTooltipVisible(boolean)?

推荐答案

我发现的唯一方法(除了创建自己的工具提示"窗口外)是重点突出CTRL + F1击键:

The only way (besides creating your own Tooltip window) I've found is to emmulate the CTRL+F1 keystroke on focus:

new FocusAdapter()
{
    @Override
    public void focusGained(FocusEvent e)
    {
        try
        {
            KeyEvent ke = new KeyEvent(e.getComponent(), KeyEvent.KEY_PRESSED,
                    System.currentTimeMillis(), InputEvent.CTRL_MASK,
                    KeyEvent.VK_F1, KeyEvent.CHAR_UNDEFINED);
            e.getComponent().dispatchEvent(ke);
        }
        catch (Throwable e1)
        {e1.printStackTrace();}
    }
}

不幸的是，只要将鼠标移到组件外部(在组件外部)或经过一段时间(请参阅 ToolTipManager.setDismissDelay )，工具提示就会消失.

Unfortunately, the tooltip will disappear as soon as you move your mouse (outside of the component) or after a delay (see ToolTipManager.setDismissDelay).

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