Question

我有一个快速问题给你们，好吧，快点给你，对我来说不是很快。

我有一个充满Arc2D形状的数组，我有一个MouseAdapter

在mousePressed事件中，我需要将点击的Arc2D与Arc2D的数组进行比较，甚至更好，自动识别单击哪个Arc2D然后能够从那里开始工作（更改颜色，更具体）

我试过这个

private class MyMouseAdapter extends MouseAdapter {
     public void mousePressed(MouseEvent e) {
         Point p = e.getPoint();
         Component c = gamePanel.getComponentAt(p);

         if(c == arcs[0]) {
             System.out.println("test");
         }
     }
}

当然不起作用，但老实说我不知道该怎么做

提前多多感谢！

编辑：

在查看我在这里得到的第一个答案后，我尝试将代码更改为此

private class MyMouseAdapter extends MouseAdapter {
     public void mousePressed(MouseEvent e) {
         Point p = e.getPoint();

         if(arcs[0].contains(p)) {
             System.out.println("test");
         }
     }
}

当然不会起作用，因为arcs数组只包含稍后在此方法中绘制的弧

@Override
protected void paintComponent(Graphics graph) {
    super.paintComponent(graph);
    Graphics2D g = (Graphics2D) graph;
    // smooth graphics
    g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

    // moving to the middle of the panel
    g.translate(this.getWidth()/2, this.getHeight()/2);

    // painting colored arcs
    for(int i = 0; i < 4; i++) {
        g.setColor(dimColors[i]);
        g.fill(arcs[i]);            
    }

    // painting borders
    g.setColor(Color.BLACK);
    g.setStroke(new BasicStroke(5F));
    g.drawLine(-98, 0, 98, 0);
    g.drawLine(0, -98, 0, 98);      
    g.draw(circle);     

    // painting central white circle
    g.setColor(Color.WHITE);
    g.fill(smallCircle);        
    g.setColor(Color.BLACK);
    g.draw(smallCircle);    

}

我完全被人困住了

Answer 1

这可以让你开始......

private class MyMouseAdapter extends MouseAdapter {
    public void mousePressed(MouseEvent e) {
        Point click = e.getPoint();
        //this next loop may seem hacky
        for (Arc2D c: arcs) {
            if (c.getX() == click.getX() && c.getY() == click.getY()) {
                System.out.println("The arc at (" + c.getX() + ", " + c.getY() + ") was clicked.");
                return;
            }
        }
        System.out.println("No arcs were clicked.");
    }
}

比较Arc2D和组件

1 个答案: