停止滑鼠 [英] Stopping mouseMoved

问题描述

我想知道如何阻止mousedMoved被解雇.我一直在谷歌搜索，但找不到答案.有办法吗?我正在使用eclipse，并通过了mouseevent方法，但什么都找不到.

I was wondering how to stop mousedMoved from being fired. I've been googling but can't find an answer. Is there a method for this? I'm using eclipse and went through the mouseevent methods but just can't find anything.

    public class Drawing extends JPanel {

private ArrayList<Point> pointList;
private int counter = 0;

public Drawing() {
    setLayout(new FlowLayout());
    setBackground(Color.white);

    pointList = new ArrayList<Point>();
    addMouseListener(new MouseTrackerListener());


}

public void paintComponent(Graphics pen) {
    super.paintComponent(pen);


    for (int i = 0; i < pointList.size(); i++) {
        Point p = pointList.get(i);
        pen.fillOval(p.x, p.y, 10, 10);
    }

}

private class MouseTrackerListener extends MouseInputAdapter {
    public void mouseClicked(MouseEvent e) {

        counter++;
        if (counter % 2 != 0) {
            addMouseMotionListener(new MouseTrackerListener());


        } else {
            System.out.println("Hi");
        }

    }

    public void mouseMoved(MouseEvent e) {

        Point point = e.getPoint();
        pointList.add(point);

        repaint();

    }
}

推荐答案

您可以创建一个boolean来切换是否处于图形状态.您将boolean命名为isDrawingMode

you can create a boolean to toggle if it's on drawing status or not. you name the boolean like isDrawingMode

因此，当您单击鼠标时..将其设置为false，如果再次单击它，它将变为true；

so when you click the mouse.. you set it to false, if you click it again, it will become true;

您要做的就是单击鼠标时切换boolean isDrawingMode

all you have to do is to toggle the boolean isDrawingMode when the mouse was clicked

所以您的mousemoved listener看起来像这样

public void mouseMoved(MouseEvent e) {

        if (!isDrawingMode) return; //if isDrawingMode is false, it will not trigger to draw
        Point point = e.getPoint();
        pointList.add(point);

        repaint();

}

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