题
是否有任何方式来更改面板或类似的控制的边框?
的BackColor
我想“高亮”用户控制装置时,我将鼠标悬停在所述用户控制。
解决方案
下面是一个简单的类,突出了窗体上的控件带边框:
public class Highlighter : Control
{
public void SetTarget(Control c)
{
Rectangle r = c.Bounds;
r.Inflate(3, 3);
Bounds = r;
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
e.Graphics.FillRectangle(Brushes.Red, e.ClipRectangle);
}
}
然后,在你的形式,设置一切使用它:
private void Form1_Load(object sender, EventArgs e)
{
foreach (Control c in Controls)
{
c.MouseEnter += mouseEnter;
c.MouseLeave += mouseLeave;
}
}
private void mouseEnter(object sender, EventArgs e)
{
_highlighter.SetTarget(sender as Control);
_highlighter.Visible = true;
}
private void mouseLeave(object sender, EventArgs e)
{
_highlighter.Visible = false;
}
然后,在构造函数中,刚刚创建荧光笔:
public Form1()
{
InitializeComponent();
_highlighter = new Highlighter();
Controls.Add(_highlighter);
}
其他提示
您可以使用的MouseEnter /鼠标离开事件,要做到这一点。
private void panel1_MouseEnter(object sender, EventArgs e)
{
panel1.BackColor = System.Drawing.Color.Red;
}
private void panel1_MouseLeave(object sender, EventArgs e)
{
panel1.BackColor = System.Drawing.Color.Empty;
}
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