JPanel 图像和组件
我希望 JPanel 上有图像，并且 JPanel 上也有 JSlider 和 JRadioButton 等组件。如您所见，我从 JPanel 派生了一个类并重写了 PaintComponent 方法。这是在 JPanel 上显示图像的好方法。
public void paintComponent(Graphics g)
{
/*create image icon to get image*/
ImageIcon imageicon = new ImageIcon(imageFile); //getClass().getResource(imageFile)
Image image = imageicon.getImage();
/*Draw image on the panel*/
super.paintComponent(g);
if (image != null)
g.drawImage(image, 0, 0, getWidth(), getHeight(), this);
}
但是我有一些问题。当我在 ImagePanel 上添加 JSlider、JRRadioButton 或其他 JPanel 等组件时；该组件的背景保持默认状态，而不是背景图片。我不知道如何将此图像设置为该组件的背景。 请指导我。
问候
I would like to have image on my JPanels an also have components such as JSlider and JRadioButton on my JPanel. I derived a class from JPanel and overrided method paintComponent as you see. This is a good way to have image on JPanel.
public void paintComponent(Graphics g)
{
/*create image icon to get image*/
ImageIcon imageicon = new ImageIcon(imageFile); //getClass().getResource(imageFile)
Image image = imageicon.getImage();
/*Draw image on the panel*/
super.paintComponent(g);
if (image != null)
g.drawImage(image, 0, 0, getWidth(), getHeight(), this);
}
However I have some problems. When I add components such as JSlider, JRadioButton or another JPanel on my ImagePanel; this component's background remains as default and not background picture. I don't know how to set this image as background of this components.
please guide me.
regards
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您必须将其他组件的不透明属性设置为 false。
例如：
you must set opaque properties of other component to false.
for example :
适用于许多外观和感觉，但如果您希望它与 Nimbus 一起使用，您还应该将背景颜色设置为透明：
请参阅 此问题了解更多详细信息。
Will work for many look-and-feels, but if you want it to work with Nimbus you should also set the background color to be transparent:
See this question for more details.
对于所有其他组件，
setOpaque(false)没有帮助吗？Doesn't
setOpaque(false)for all the other components help?