编辑: 我有一个应用程序,它使用 swing 计时器来控制 Action 监听器界面何时触发。鼠标逻辑可以工作,但有时无法检测到单击。下面是我的注释代码。
public class Board extends JPanel implements MouseListener, MouseMotionListener, ActionListener
{
private MainMenu mainMenu = new MainMenu();
private static String State; /*Makes the control flow simpler, just checking
strings that describe the state. All the states are contained in GameState class.*/
public Board()
{
this.addMouseListener(this);
this.addMouseMotionListener(this);
setVisible(true);
mainMenu.initLogIn(); /*This just loads the button images*/
Timer timer = new Timer(12, this); /*(millisecond delay, tells this class
to update any actionlistener (mouselistener etc)*/
timer.start();
}
public void paint(Graphics G)
{
super.paint(G);
Graphics G2d = (Graphics2D)G;
/*Main menu paint logic*/
// This paints buttons from mainMenu class on screen
G.drawImage(mainMenu.getTopic1().getspriteImage(),
mainMenu.getTopic1().getxCoord(),
mainMenu.getTopic1().getyCoord(),this);
G.drawImage(mainMenu.getTopic2().getspriteImage(),
mainMenu.getTopic2().getxCoord(),
mainMenu.getTopic2().getyCoord(), this);
G.drawImage(mainMenu.getTopic3().getspriteImage(),
mainMenu.getTopic3().getxCoord(),
mainMenu.getTopic3().getyCoord(),this);
/*Shows mouse input worked by changing the background color*/
if (State == GameState.MAINMENU_TOPIC1)
{
setBackground(Color.BLACK);
}
if (State == GameState.MAINMENU_TOPIC2)
{
setBackground(Color.BLUE);
}
if (State == GameState.MAINMENU_TOPIC3)
{
setBackground(Color.GRAY);
}
repaint(); //tells paint to repaint, which allows gui to update
}
@Override
public void mouseClicked(MouseEvent e)
{
Point point = e.getPoint();
/*This contains the logic to change State based on mouse clicks*/
if(mainMenu.getTopic1().getRectangle().contains(point))
{
State = GameState.MAINMENU_TOPIC1;
}
if(mainMenu.getTopic2().getRectangle().contains(point))
{
State = GameState.MAINMENU_TOPIC2;
}
if(mainMenu.getTopic3().getRectangle().contains(point))
{
State = GameState.MAINMENU_TOPIC3;
}
}
所以,我不确定为什么不总是检测到鼠标点击。我知道分配给更新操作监听器的时间可能太短。然而,机器循环的代码并不多,所以我认为这不是问题。有什么想法可能会导致鼠标出现这种行为吗?
此外,我稍后肯定会使用 JButtons 来实现这一点。我确信这将有助于清理我在更大项目上的代码
感谢您的评论,我希望这能解决大部分问题。
最佳答案
鼠标“单击”本质上可能是双击或三次单击。您可以使用 evt.clickCount
获得该值。它将合并为一个事件。
如果您想获得每次“按下”,请使用 mousePressed()
。
关于java - java中鼠标输入问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30308113/