将 Swing 组件作为内容的自定义 Java 工具提示不显示 [英] Custom Java tool tip with Swing components as content does not show up
问题描述
我试图在组件的工具提示中显示多个图像,找到了 createToolTip()
并实现了一个自定义添加所需的组件,如下所示:
I'm trying to show multiple images in a component's tooltip, found createToolTip()
and implemented a custom that adds the needed components like this:
setComponent(component);
JPanel images = new JPanel(null);
images.setLayout(new BoxLayout(images, BoxLayout.X_AXIS));
for(ImageIcon icon:myIcons) {
images.add(new JLabel(icon));
}
JPanel content = new JPanel(new BorderLayout());
content.add(new JLabel(title), BorderLayout.NORTH);
content.add(new JLabel(description));
content.add(images, BorderLayout.SOUTH);
add(content);
然而,我看到的只是一个小点,表示显示了工具提示,但不知何故忽略了大小.实施自定义工具提示时我会错过什么?
However, all I see is a little dot, indicating that the tool tip is shown, but somehow the size is ignored. What do I miss implementing a custom tooltip?
推荐答案
基本的问题"是 JToolTip
The base "problems" are that JToolTip
- 不是被设计为容器,它只是偶然的容器,因为 JComponent 是.对于 Swing 非容器",它的 ui 委托有责任充当 LayoutManager.
- 不够丰富,它只能处理文本(至少对于紧急门 html,这是@Andrew 的最爱:-)
- is-not designed as a container, it's only accidentally a container because JComponent is. For a Swing "not-container" its the responsibility of the ui-delegate to act as LayoutManager.
- isn't rich enough, it can handle text-only (at least with the emergency door html, which is @Andrew's favourite :-)
绕过这些限制基本上是使小部件几乎超越边缘.一个干净的解决方案会滚动一个新组件.另一方面,OP 已经找到了要调整的螺丝.唯一可以稍微改进的是既不调用 setXXSize,也不设置自定义 ui.相反,通过覆盖 getXXSize() 使其表现得像一个容器:
By-passing those limitations basically is a driving that widget nearly over the edge. A clean solution would roll a new component .. On the other hand, the OP already found the screws to tweak. The only thingy that could be slightly improved is to neither call setXXSize, nor set a custom ui. Instead, make it behave like a container by overriding getXXSize() like:
@Override
public Dimension getPreferredSize() {
if (getLayout() != null) {
return getLayout().preferredLayoutSize(this);
}
return super.getPreferredSize();
}
这篇关于将 Swing 组件作为内容的自定义 Java 工具提示不显示的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!