Question

我想制作一个可以关闭/移除的可拖动且可调整大小的面板。拖动面板工作正常，但我的调整大小代码中存在一些错误。它工作但不是很好。也许有人可以帮助我解决它。问题是设置标签的正确位置“关闭”和“调整大小”。

感谢您的帮助

public class PanelDraggable extends JPanel {

    private Point pointPressed;
    int width1;
    int height1;
    int headerHeight;
    int closeDim;

    JLabel close;
    JLabel resize;
    JPanel cs;
    JLabel header;

    public PanelDraggable( int x,  int y, int width, int height, String lblName) {

        //        draggable.setCursor(draggable.getCursor());
        //        setCursor(new Cursor(Cursor.HAND_CURSOR));

        width1 = width; height1 = height;
        closeDim = 15;

        headerHeight = 20;

        setBounds(x, y, width, height);
        this.setLayout(null);
        setBorder(new LineBorder(new Color(147, 147, 255), 3, true));
        this.setOpaque(true);


        //header
        header = new JLabel(lblName);
        this.add(header);
        header.setBounds(0, 0, width-(closeDim + 2), headerHeight);
        header.setBorder(new LineBorder(new Color(147, 147, 255), 3, true));
        header.setBackground(new Color(147, 147, 255));
        header.setOpaque(true);
        MouseInputAdapter mouseAdapter = new HeaderMouseHandler();
        header.addMouseMotionListener(mouseAdapter);
        header.addMouseListener(mouseAdapter);

        //close Button
        close = new JLabel("cx");
        close.setIcon(new ImageIcon("icons/close_16x16.png"));
        close.setBounds( (width- (closeDim + 2)) , 2, closeDim, closeDim);
        close.setCursor(new Cursor(Cursor.HAND_CURSOR));
        this.add(close);

        //Container
        cs = new JPanel();
        cs.setBounds(0, headerHeight, width, (height-headerHeight) );
        cs.setOpaque(false);
        cs.setBackground(Color.red);
        this.add(cs);

        //Resise
        resize = new JLabel("re");
        resize.setBounds( (width-closeDim), (height-closeDim) , closeDim, closeDim);
        resize.setCursor(new Cursor(Cursor.SE_RESIZE_CURSOR));
        this.add(resize);

        MouseInputAdapter resizeMouseAdapter = new ResizeMouseHandler();
        resize.addMouseMotionListener(resizeMouseAdapter);
        resize.addMouseListener(resizeMouseAdapter);

    }


    private class HeaderMouseHandler extends MouseInputAdapter {

        public void mouseDragged(final MouseEvent e) {
            Point pointDragged = e.getPoint();
            Point loc = getLocation();
            loc.translate(pointDragged.x - pointPressed.x,
                pointDragged.y - pointPressed.y);
            setLocation(loc);

        }

        public void mousePressed(final MouseEvent e) {

                pointPressed = e.getPoint();

        }
    }

    private class ResizeMouseHandler extends MouseInputAdapter {

        public void mouseDragged(final MouseEvent e) {
            Point pointDragged = e.getPoint();

            int w = width1 + pointDragged.x;
            int h = height1 + pointDragged.y;

            setSize(w , h);
            cs.setSize(w, (h-headerHeight) );
            header.setSize(w -(closeDim + 2), headerHeight);

            //Point loc = getLocation();
            //loc.translate(pointDragged.x - pointPressed.x,
                //pointDragged.y - pointPressed.y);

            //System.out.println("p: "+Integer.toString((pointDragged.x - pointPressed.x)) + " / " + Integer.toString((pointDragged.y - pointPressed.y)));
            //System.out.println("n: "+Integer.toString(w) + " / " + Integer.toString(h));
            //System.out.println("o: "+Integer.toString(width1) + " / " + Integer.toString(height1));

            Point resizeloc = new Point();
            resizeloc.translate(w-closeDim, h-closeDim);
            resize.setLocation(resizeloc);

            //Point closeloc = new Point();
            //closeloc.translate((w - (closeDim + 2)) , 2 );
            //close.setLocation(closeloc);


            revalidate(); 
            repaint();
        }

        public void mousePressed(final MouseEvent e) {

                pointPressed = e.getPoint();

        }
    }
}

Answer 1

现在解决了。问题是面板的尺寸（我对标签新位置的引用）不是变量。

int w = width1 + pointDragged.x;
        int h = height1 + pointDragged.y;

使JPanel可调整大小

1 个答案: