如何控制已经改变，如何中断mouseUp事件

Question

我刚刚在Windows窗体中完成了扫雷游戏，这是我为实践而完成的。

一切运行良好，但我发现，如果您单击并按住一个按钮，它将展开，即使鼠标不再指向该按钮。

你有一个简单的想法，我该如何解决这个问题？

验证码：

/// <summary> 
/// Build up a new Gamefield with the number of buttons, the user has selected 
/// </summary> 
private void DrawGameField() 
{ 
    _buttons = new Button[_xLength, _yLength]; 
    for (int yPos = 0; yPos < _yLength; yPos++) 
    { 
    for (int xPos = 0; xPos < _xLength; xPos++) 
    { 
     var btn = new Button() 
     { 
     Tag = new Point(xPos, yPos), 
     Location = new Point(xPos * 30, yPos * 30), 
     Size = new Size(30, 30), 
     }; 

     _buttons[xPos, yPos] = (Button)btn; 
     btn.MouseUp += btn_Click; 
     _gamePanel.Controls.Add(btn); 
    } 
    } 
} 

/// <summary> 
/// Is called when a field is left-clicked 
/// </summary> 
private void LeftMouseClick(object sender, MouseEventArgs e) 
{ 
    var btn = sender as Button; 
    Point pt = (Point)btn.Tag; 

    // If there's already a flag on the field make it unclickable for left mouseclick 
    if (btn.Image != null) 
    return; 

    _game.UnfoldAutomatically(pt.X, pt.Y); 
    btn.Text = (_game.ReturnNumberInField(pt.X, pt.Y)).ToString(); 

    // If clicked field was not a bombfield 
    if (btn.Text != "-1") 
    UnfoldFields(); 

    else 
    LooseGame(); 
} 

每一个按键都得到了mouseUp事件事件在DrawGameField - 方法。 每个按钮在该方法中也会得到一个标签，所以它可以被识别。 只要用户（mouseUp）在游戏区按钮上点击一次，LeftMouseClick就是calles。

我想取消，如果释放鼠标左键的按钮是不同的按钮，实际上点击。

这应该给用户改变主意的可能性......他可能实际上点击了一个字段，然后意识到他不想展开该字段，但在我的解决方案中，他不能撤消他的点击呢......

Answer 1

好，大家好，有一点点帮助，我有正确的解决问题的办法，主要内容如下：

使用“鼠标点击”而不是“的MouseUp”或“的MouseDown”。

为什么？

鼠标点击在内部使用的MouseDown然后执行MouseCapture（通知，其控制是的MousePointer和检查下，鼠标是否仍然指向对照） 如果为true - >单击事件 如果假 - >返回

工作代码：

/// <summary> 
/// Build up a new Gamefield with the number of buttons, the user has selected 
/// </summary> 
private void DrawGameField() 
{ 
    // _xLength is the length of the field in x-direction 
    // _yLength is the length of the field in y-direction 
    var buttons = new Button[_xLength, _yLength]; 

    // Filling the buttonArray 
    for (int yPos = 0; yPos < _yLength; yPos++) 
    { 
    for (int xPos = 0; xPos < _xLength; xPos++) 
    { 
     var btn = new Button() 
     { 
     Tag = new Point(xPos, yPos), 
     Location = new Point(xPos * 30, yPos * 30), 
     Size = new Size(30, 30) 
     }; 
     // Apply a clickEvent to every button 
     btn.MouseClick += Button_MouseClick; //first change here: Use MouseClick!!! 
     buttons[xPos, yPos] = btn; 
    } 
    } 
    AddGameButtonsToPanel(buttons); 
} 

/// <summary> 
/// Adds Buttons to the gamepanel 
/// </summary> 
private void AddGameButtonsToPanel(Button[,] buttons) 
{ 
    _buttons = buttons; 
    _gamePanel.SuspendLayout(); 
    try 
    { 
    foreach (var btn in buttons) 
     _gamePanel.Controls.Add(btn); 
    } 
    finally 
    { 
    _gamePanel.ResumeLayout(); 
    } 
} 

/// <summary> 
/// Checks which mouse-button was clicked and calls the correct method for that button 
/// </summary> 
private void Button_MouseClick(object sender, MouseEventArgs e) 
{ 
    // If it is the firs time a button is clicked, the stopwatch is started 
    if (_firstClick) 
    StartStopWatch(); 

    var btn = sender as Button; 
    Point pt = (Point)btn.Tag; 

    if (e.Button == MouseButtons.Left) 
    Button_LeftClick(btn, pt); 
    else 
    Button_RightClick(btn, pt); 
} 

Answer 2

您可以在MouseDown事件上设置的窗体上创建一个变量。因此，在MouseDown中，您将变量设置为单击按钮的按钮标签。

然后在MouseUp上，您可以将他设置的值与当前发件人标记值进行比较。