我有一个带有背景图像的按钮。如何在一定条件下触发 mouseleave 事件？

Question

我有一个带背景的按钮。我创建了 mouseenter & mouseleave 事件。在 mouseleave 事件中，如果鼠标光标在 2 个坐标之外，则会触发 mouseleave 事件。

private void Button_SpanMouseEnter(object sender, EventArgs e)
    {
        Button x = sender as Button;
        x.Size = new Size(500, 250);
        x.Location = new Point(0, 0);
    }

    private void Button_SpanMouseLeave(object sender, EventArgs e)
    {
        Button x = sender as Button;

        //If cursor is outside of this coordinates(0,0) & (250,125)
        //it will trigger this size
        x.Size = new Size(250,125);
        x.Location = new Point(0, 0);
    }

我的问题是当我离开 500X250 矩形时，它会触发鼠标离开。我希望它在 250X125 矩形中触发。

Answer 1

要归档您正在尝试的效果，您需要使用MouseMove 事件而不是Button_MouseLeave 事件。所以删除你的 Button_SpanMouseLeave 事件并添加这个：

private void button1_MouseMove(object sender, MouseEventArgs e)
{
    Button x = sender as Button;
    Point p = PointToClient(System.Windows.Forms.Control.MousePosition);
    if (p.X > 250|| p.Y >125)
    {
        button1.Size = new Size(250, 125);
        button1.Location = new Point(0, 0);
    }
}

编辑

实际上，您根本不需要 PointToClient 方法。所以代码是这样的：

private void button1_MouseMove(object sender, MouseEventArgs e)
{
    Button x = sender as Button;
    if (e.X > 250|| e.Y >125)
    {
        x.Size = new Size(250, 125);
        x.Location = new Point(0, 0);
    }
}

编辑 2

好的，如果按钮不在0,0，那么最好像这样使用PointToClient：

private void button1_MouseMove(object sender, MouseEventArgs e)
{
    Button x = sender as Button;
    Point p = PointToClient(System.Windows.Forms.Control.MousePosition);
    this.label1.Text = p.X.ToString() + " " + p.Y.ToString();
    if (p.X > x.Location.X + 250 || p.Y > x.Location.Y+125)
    {
        button1.Size = new Size(250, 125);
    }
}