淡出并淡出表格

Question

我有一个要求,我的表格是透明的,如果我的鼠标进入它,表格应该变得可见,如果我的鼠标离开表格它变得透明,我有三个不同的控件放在我的表格,每个控制鼠标离开和鼠标输入与表单相同.如果我的鼠标进入窗体并进入控件form_mouseleaveevent并且control_mouseenterd被触发,那么我无法实现它,如何克服这个问题.

下面是这段代码:

  private void TransToOpac()
    {  
        if (!isTransparent)
            return;

       if (TtoOON == false )
        {
            TtoOON = true;
            for (i = this.Opacity; i <= 1; i = i + 0.02)
            {
                this.Opacity = i;
                Thread.Sleep(50);
            }
            isTransparent = false;
            TtoOON = false;
        }
    }
    private void OpacToTrans()
    {
        if (isTransparent)
            return;

        if (OtoTON == false )
        {
            OtoTON = true;
            for (i = this.Opacity; i >= 0.5; i = i - 0.02)
            {
                this.Opacity = i;
                Thread.Sleep(50);
            }
            isTransparent = true;
            OtoTON = false;
        }
    }

private void OnMouseEntered(object sender,EventArgs e){TransToOpac(); } private void OnMouseLeft(object sender,EventArgs e){OpacToTrans(); }

Answer 1

您无法使用MouseEnter/Leave事件完成此操作.较小的问题是,如果控件靠近边缘,则表单的Leave事件可能永远不会触发.更大的问题是,当光标移动到非客户区域(边框,标题)时会触发,当用户尝试关闭或调整窗口大小时,您不希望淡化窗体.

粗略但有效的解决方案是使用计时器来检查鼠标的位置:

public partial class Form1 : Form {
    public Form1() {
        InitializeComponent();
        this.Opacity = 0.99;        // Avoid flicker
        mFadeTimer.Interval = 15;
        mFadeTimer.Tick += new EventHandler(mFadeTimer_Tick);
        mMouseTimer.Interval = 200;
        mMouseTimer.Tick += new EventHandler(mMouseTimer_Tick);
        mMouseTimer.Enabled = true;
    }
    void mMouseTimer_Tick(object sender, EventArgs e) {
        if (this.Bounds.Contains(Control.MousePosition)) {
            if (mFade <= 0) { mFade = 1; mFadeTimer.Enabled = true; }
        }
        else {
            if (mFade >= 0) { mFade = -1; mFadeTimer.Enabled = true; }
        }
    }
    void mFadeTimer_Tick(object sender, EventArgs e) {
        double opaq = this.Opacity + mFade * 0.05;
        if (opaq >= 0.99) { opaq = 0.99; mFadeTimer.Enabled = false; }
        if (opaq <= 0.15) { opaq = 0.15; mFadeTimer.Enabled = false; }
        this.Opacity = opaq;
    }
    private Timer mFadeTimer = new Timer();
    private Timer mMouseTimer = new Timer();
    private int mFade = 0;
}