EventHandler (加掛 Class 的 event 處理函數)

加掛 Class 的 event 處理函數

public CustomColorCheckBox()

{

this.checkColor = this.ForeColor;

this.Paint += new PaintEventHandler(this.PaintHandler);

this.Click += new EventHandler(this.OnClick1);

this.KeyUp += new KeyEventHandler(OnKeypress);

}

public void OnKeypress(object sender, KeyEventArgs e)

{
MessageBox.Show(e.KeyCode.ToString(), "Your input");
}

public void OnClick1(object sender, EventArgs e)

{

MessageBox.Show("Hello C#");

}

private void PaintHandler (object sender, PaintEventArgs pe)

{

if (this.Checked)

{

Point pt = new Point();

if (this.CheckAlign == ContentAlignment.BottomCenter)

{

pt.X = (this.Width / 2) - 4;

pt.Y = this.Height - 11;

}

if (this.CheckAlign == ContentAlignment.BottomLeft)

{

pt.X = 3;

pt.Y = this.Height - 11;

}

if (this.CheckAlign == ContentAlignment.BottomRight)

{

pt.X = this.Width - 11;

pt.Y = this.Height - 11;

}

if (this.CheckAlign == ContentAlignment.MiddleCenter)

{

pt.X = (this.Width / 2) - 4;;

pt.Y = (this.Height / 2) - 4;

}

if (this.CheckAlign == ContentAlignment.MiddleLeft)

{

pt.X = 3;

pt.Y = (this.Height / 2) - 4;

}

if (this.CheckAlign == ContentAlignment.MiddleRight)

{

pt.X = this.Width - 11;

pt.Y = (this.Height / 2) - 4;

}

if (this.CheckAlign == ContentAlignment.TopCenter)

{

pt.X = (this.Width / 2) - 4;

pt.Y = 3;

}

if (this.CheckAlign == ContentAlignment.TopLeft)

{

pt.X = 3;

pt.Y = 3;

}

if (this.CheckAlign == ContentAlignment.TopRight)

{

pt.X = this.Width - 11;

pt.Y = 3;

}

DrawCheck(pe.Graphics, this.checkColor,pt);

}

}