Button click event not functioning after changing its shape

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Hi all,

Can anybody tell why the button click event doesn't occur when the shape of the button is changed form its regular shape. Like i have changed its shape from rectangle to Octagonal shape using paint event properties. I have added a button in the form and initialized the size, after that using paint event i have created octagonal shape of it. Here is the code that i have implemented:

C#

public Form1()
{
    InitializeComponent();  
    button1.Size = new Size(150, 130);
}

protected override void OnPaint(PaintEventArgs e)
{
     System.Drawing.Drawing2D.GraphicsPath g_path = new System.Drawing.Drawing2D.GraphicsPath();
     Point[] myarr = { new Point(10, 35), new Point(10, 95), new Point(30, 115), new Point(110, 115), new Point(130, 95), new Point(130, 35), new Point(110, 15), new Point(30, 15) };
     button1.BackColor = System.Drawing.Color.Green;
     button1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
     g_path.AddPolygon(myarr);
     button1.Region = new Region(g_path);
}

private void button1_Click(object sender, EventArgs e)
{
    MessageBox.Show("HI");
}

Posted 8-May-13 23:58pm

Jagadisha_Ingenious

Updated 9-May-13 0:18am

v4

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2 solutions

Solution 2

Try this:

protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
System.Drawing.Drawing2D.GraphicsPath g_path = new System.Drawing.Drawing2D.GraphicsPath();
Point[] myarr = { new Point(10, 35), new Point(10, 95), new Point(30, 115), new Point(110, 115), new Point(130, 95), new Point(130, 35), new Point(110, 15), new Point(30, 15) };
button1.BackColor = System.Drawing.Color.Green;
button1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
g_path.AddPolygon(myarr);
button1.Region = new Region(g_path);
}

Posted 9-May-13 0:34am

Sukanta Dey

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OriginalGriff · Accepted Answer · 2013-05-09T00:32:00

It doesn't stop working: it's just that the remaining region is pretty small unless you have enlarged the button from it's standard size, so you have to click in the right place.

But why are you doing that in the form OnPaint override? You do realize that that is done every time the form is painted, and you only need to do it once? Put it in the Form Load event handler instead...

Personally, I wouldn't do it this way at all - I would create a new class derived from Button (called HexButton perhaps?) to keep all that within the control itself. (And not have your big margins, either)