custom checkbox in c#
using System;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.VisualStyles;
namespace CheckBoxRendererSample
{
class Form1 : Form
{
public Form1()
: base()
{
CustomCheckBox CheckBox1 = new CustomCheckBox();
Controls.Add(CheckBox1);
if (Application.RenderWithVisualStyles)
this.Text = "Visual Styles Enabled";
else
this.Text = "Visual Styles Disabled";
}
[STAThread]
static void Main()
{
// If you do not call EnableVisualStyles below, then
// CheckBoxRenderer.DrawCheckBox automatically detects
// this and draws the check box without visual styles.
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}
public class CustomCheckBox : Control
{
private Rectangle textRectangleValue = new Rectangle();
private Point clickedLocationValue = new Point();
private bool clicked = false;
private CheckBoxState state = CheckBoxState.UncheckedNormal;
public CustomCheckBox()
: base()
{
this.Location = new Point(50, 50);
this.Size = new Size(100, 20);
this.Text = "Click here";
this.Font = SystemFonts.IconTitleFont;
}
// Calculate the text bounds, exluding the check box.
public Rectangle TextRectangle
{
get
{
using (Graphics g = this.CreateGraphics())
{
textRectangleValue.X = ClientRectangle.X +
CheckBoxRenderer.GetGlyphSize(g,
CheckBoxState.UncheckedNormal).Width;
textRectangleValue.Y = ClientRectangle.Y;
textRectangleValue.Width = ClientRectangle.Width -
CheckBoxRenderer.GetGlyphSize(g,
CheckBoxState.UncheckedNormal).Width;
textRectangleValue.Height = ClientRectangle.Height;
}
return textRectangleValue;
}
}
// Draw the check box in the current state.
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
CheckBoxRenderer.DrawCheckBox(e.Graphics,
ClientRectangle.Location, TextRectangle, this.Text,
this.Font, TextFormatFlags.HorizontalCenter,
clicked, state);
}
// Draw the check box in the checked or unchecked state, alternately.
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (!clicked)
{
clicked = true;
this.Text = "Clicked!";
state = CheckBoxState.CheckedPressed;
Invalidate();
}
else
{
clicked = false;
this.Text = "Click here";
state = CheckBoxState.UncheckedNormal;
Invalidate();
}
}
// Draw the check box in the hot state.
protected override void OnMouseHover(EventArgs e)
{
base.OnMouseHover(e);
state = clicked ? CheckBoxState.CheckedHot :
CheckBoxState.UncheckedHot;
Invalidate();
}
// Draw the check box in the hot state.
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
this.OnMouseHover(e);
}
// Draw the check box in the unpressed state.
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
state = clicked ? CheckBoxState.CheckedNormal :
CheckBoxState.UncheckedNormal;
Invalidate();
}
}
}