Java 自定义UI绘制问题
我有一个JInternalFrame,我正在对其应用自定义UI。UI绘制组件,但当我将JPanel添加到JInternalFrame时,它不会显示。我认为UI会影响整个组件,但是如何绘制UI然后绘制组件呢 但是如果有人有更好的方法,请告诉我!谢谢Java 自定义UI绘制问题,java,swing,paint,Java,Swing,Paint,我有一个JInternalFrame,我正在对其应用自定义UI。UI绘制组件,但当我将JPanel添加到JInternalFrame时,它不会显示。我认为UI会影响整个组件,但是如何绘制UI然后绘制组件呢 但是如果有人有更好的方法,请告诉我!谢谢 public class ClassInternalFrame extends JInternalFrame { public static Color currentColor; public static final Color C
public class ClassInternalFrame extends JInternalFrame {
public static Color currentColor;
public static final Color CLASS_TYPE = new Color(148, 227, 251);
public ClassInternalFrame(String title, Color classType) {
super(title, true, true, false, true);
currentColor = classType;
super.setUI(new ClassFrameUI());
Container pane = super.getContentPane();
pane.setLayout(new BorderLayout());
JPanel titlePanel = new JPanel();
titlePanel.setPreferredSize(new Dimension(0, 20));
pane.add(titlePanel, BorderLayout.NORTH);
titlePanel.setBorder(new MatteBorder(1, 1, 1, 1, Color.yellow));
}
}
class ClassFrameUI extends InternalFrameUI {
private final static ClassFrameUI frmUI = new ClassFrameUI();
public static ComponentUI createUI(JComponent c) {
return frmUI;
}
@Override
public void paint(Graphics g, JComponent c)
{
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(Color.LIGHT_GRAY);
g2d.fillRect(0, 0, c.getWidth(), c.getHeight());
g2d.setColor(ClassInternalFrame.currentColor);
g2d.fillRect(0, 0, c.getWidth(), 20);
g2d.setColor(Color.DARK_GRAY);
g2d.setStroke(new BasicStroke(1, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, new float[] { 1, 0 }, 0));
g2d.drawRect(0, 0, c.getWidth()-1, c.getHeight()-1);
g2d.drawLine(0, 20, c.getWidth(), 20);
}
}
问题不在于您正在绘制任何内容,而是
InternalFrameUI
完全不做任何事情(如果它做了,您还需要调用super.paint(g,c);
)。通常,组件的绘制由子类完成,例如BasicInternalFrameUI
。看起来您正试图绘制一个自定义标题栏,这是一个BasicInternalFrameUI
委托给BasicInternalFrameTitleBar
的任务