事件处理程序和鼠标单击

问题描述

我在弄清楚如何管理处理程序时遇到了麻烦。

问题是我有5个图片框，他们有共享处理程序，例如当我将鼠标悬停在他们上面时，他们会获得BorderStyle.Fixed3D if鼠标离开然后BorderStyle.None发生工作正常。但是这里有问题..我需要左键单击鼠标以保持图片框Stuck in BorderStyle.Fixed3D但我认为它不起作用因为MouseLeave事件有任何建议如何修复它？



我尝试过：

I'm having a trouble figuring out how to manage the handlers.
Problem is i have 5 picture box and they have shared handlers for example when I hover over them they get BorderStyle.Fixed3D if mouse leaves then BorderStyle.None occurs that works fine. But here is the problem.. I need to left click the mouse to keep the picturebox Stuck in BorderStyle.Fixed3D but I think it doesn't work because of the MouseLeave event any suggestion how to fix that ?

What I have tried:

private void SetEvents() //Initilize events
        {
            teningur1.MouseHover += PictureBoxes_MouseHover;
            teningur2.MouseHover += PictureBoxes_MouseHover;
            teningur3.MouseHover += PictureBoxes_MouseHover;
            teningur4.MouseHover += PictureBoxes_MouseHover;
            teningur5.MouseHover += PictureBoxes_MouseHover;

            teningur1.MouseLeave += PictureBoxes_MouseLeave;
            teningur2.MouseLeave += PictureBoxes_MouseLeave;
            teningur3.MouseLeave += PictureBoxes_MouseLeave;
            teningur4.MouseLeave += PictureBoxes_MouseLeave;
            teningur5.MouseLeave += PictureBoxes_MouseLeave;

            teningur1.MouseClick += PictureBoxes_MouseClick;
            teningur2.MouseClick += PictureBoxes_MouseClick;
            teningur3.MouseClick += PictureBoxes_MouseClick;
            teningur4.MouseClick += PictureBoxes_MouseClick;
            teningur5.MouseClick += PictureBoxes_MouseClick;
        }


        private void PictureBoxes_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                ((PictureBox)sender).BorderStyle = BorderStyle.Fixed3D;

            }

        }


        //Event handlers
        static private void PictureBoxes_MouseHover(object sender, EventArgs e)
        {
            ((PictureBox)sender).BorderStyle = BorderStyle.Fixed3D;
        }

        static private void PictureBoxes_MouseLeave(object sender, EventArgs e)
        {
            ((PictureBox)sender).BorderStyle = BorderStyle.None;
        }

推荐答案

PictureBox p = sender as PictureBox;
if (p != null)
    {
    p.BorderStyle = BorderStyle.Fixed3D;
    }

在你的离职时：

In your Leave hander:

PictureBox p = sender as PictureBox;
if (p != null)
    {
    p.BorderStyle = (BorderStyle) p.Tag;
    }

和你的Click处理程序：

And your Click handler:

PictureBox p = sender as PictureBox;
if (p != null)
    {
    p.BorderStyle = BorderStyle.Fixed3D;
    p.Tag = p.BorderStyle;
    }

private void PictureBoxes_MouseClick(object sender, MouseEventArgs e)
{
    PictureBox pBox = sender as PictureBox;

    if (e.Button == MouseButtons.Left)
    {
        pBox.MouseLeave -= PictureBoxes_MouseLeave;
    }
    else if (e.Button == MouseButtons.Right)
    {
        pBox.MouseLeave -= PictureBoxes_MouseLeave; // prevent double subscription
        pBox.MouseLeave += PictureBoxes_MouseLeave;
    }
}

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