Question

我尝试在A类中处理MousePressed事件，它从抽象类B扩展并实现接口C，但我只处理MouseClicked，MousePressed不起作用

接口C

    public interface C {

    public void setText(String msg, Dimension d);

    public void setVisible(boolean b);

    public boolean isVisible();

    public Dimension getSize();

    public void setLocation(Point p);

}

抽象类B

public abstract class B {
public B() {
}

int x, y, w, h, size;

private boolean visible = false;

MouseListener mouseListener = null;

boolean isInner(int p_x, int p_y) {
    ......
}

public void addMouseListener(MouseListener l) {
    mouseListener = l;
}

public void setVisible(boolean b) {
    .....
}

public boolean isVisible() {
    ........
}

public void repaint() {
    .......
}

public void setSize(int size) {
    .......
}

public void setLocation(int x, int y) {
    ........
}

public Dimension getSize() {
    .......
}

public Point getLocationOnScreen() {
    .........
}

}

我的A级：

public class A extends B implements C {

private String _text;

private String[] _lines;

private Color _backgroundColor = new Color(255, 255, 192);

private Color _borderColor = new Color(128, 128, 128);

private Color _foreColor = Color.black;

private int _fontSize = 9;

private boolean inner_viewer = false;

private TextLayout textLayout;

private TextLayout _lstTextLayout[];


public A(String msg, Dimension d, int fontSize, Color foreColor, Color bkColor, Color borderColor) {

    setText(msg, d, fontSize, foreColor, bkColor, borderColor);

    inner_viewer = EXE_NAME.equals(D.get_extensionToolCommand());

    this.addMouseListener(new MouseListener() {

        @Override
        public void mouseReleased(MouseEvent e) {
            System.err.println("Released");
        }

        @Override
        public void mousePressed(MouseEvent e) {
            System.err.println("Pressed");
        }

        @Override
        public void mouseExited(MouseEvent e) {
            System.err.println("Exited");
        }

        @Override
        public void mouseEntered(MouseEvent e) {
            System.err.println("Entered");
        }

        @Override
        public void mouseClicked(MouseEvent e) {
            System.err.println("Click");
        }
    });
}

@Override
public void setText(String msg, Dimension d, int fontSize, Color foreColor, Color bkColor, Color borderColor) {
    this._fontSize = fontSize;
    this._foreColor = foreColor;
    this._backgroundColor = bkColor;
    this._borderColor = borderColor;
    this._text = msg;
    this.w = d.width;
    this.h = d.height;
    this._lines = _text.split("\n");
    this._lstTextLayout = new TextLayout[_lines.length];
}

@Override
public void setLocation(Point p) {
    super.setLocation(p.x, p.y);
}

public void paint(Graphics g) {
    ................
}}

我不明白＆＃34;为什么只有MouseClicked才能正常工作，所有其他鼠标事件都无法正常工作＆＃34;。

感谢所有回答。

Answer 1

您声称的内容是不可能的。 MouseClicked是MousePressed和MouseReleased的小兄弟......它本身不是一个系统事件，而是一个由MousePressed和MouseReleased之间的时间生成的合成的事件。有关此问题的进一步证明，请查看java.awt.Robot ...请参阅那里的MouseClicked方法？不，因为没有一个。

不可能。案件结案

Answer 2

问题解决了，我找到了为A类定义mouseEvent的地方，我在定义新鼠标事件时添加了注释。

Class AScreen：

public class AScreen extends JWindow {

..................................

private MouseListener callIfNeed(A a) {
    if (a == null || a.mouseListener == null) {
        final MouseListener dummy = new MouseAdapter() {
        };
        return dummy;
    }
    return a.mouseListener;
}

private InnerAnnotateSticky frontA(MouseEvent e1) {
    Point p = e1.getPoint();
    for (int i = front_element.size() - 1; i >= front.size(); i--) {
        if (front_element.get(i).isInner(p.x, p.y))
            return (A) front_element.get(i);
    }
    return null;
}

private enum MOUSE_EVENT {
    CLICK,
    //define new mouse event
    PRESSED,
    RELEASED,
}

private MouseAdapter adapter = new MouseAdapter() {

    private void mouseEventUpdate(MOUSE_EVENT event, MouseEvent e) {

        synchronized (getInstance()) {
            if (event.equals(MOUSE_EVENT.CLICK)) {
                A a = frontA(e);
                MouseListener listener = callIfNeed(a);
                if (listener != null) {
                    listener.mouseClicked(e);
                }
            }

            // add new mouse event 
            if (event.equals(MOUSE_EVENT.PRESSED)) {
                A a = frontA(e);
                MouseListener listener = callIfNeed(a);
                if (listener != null) {
                    listener.mousePressed(e);
                }
            }

            if (event.equals(MOUSE_EVENT.RELEASED)) {
                A a = frontA(e);
                MouseListener listener = callIfNeed(a);
                if (listener != null) {
                    listener.mouseReleased(e);
                }
            }

        }
    }


    @Override
    public void mouseClicked(MouseEvent e) {
        mouseEventUpdate(MOUSE_EVENT.CLICK, e);
    }

    //I add new 2 override method
    @Override
    public void mousePressed(MouseEvent e) {
        mouseEventUpdate(MOUSE_EVENT.PRESSED, e);
    };

    @Override
    public void mouseReleased(MouseEvent e) {
        mouseEventUpdate(MOUSE_EVENT.RELEASED, e);
    };
};
........................

}

感谢所有回答！

Java鼠标事件 - MouseClicked工作正常但MousePressed和MouseReleased没有

2 个答案: