Subclass CheckBox

image_pdfimage_print

using System;
using System.Drawing;
using System.Windows.Forms;

class CustomCheckBox: Form
{
public static void Main()
{
Application.Run(new CustomCheckBox());
}
public CustomCheckBox()
{
int cyText = Font.Height;
int cxText = cyText / 2;
FontStyle[] afs = { FontStyle.Bold, FontStyle.Italic,
FontStyle.Underline, FontStyle.Strikeout };

Label label = new Label();
label.Parent = this;
label.Text = “Sample Text”;
label.AutoSize = true;

for (int i = 0; i < 4; i++) { FontStyleCheckBox chkbox = new FontStyleCheckBox(); chkbox.Parent = this; chkbox.Text = afs[i].ToString(); chkbox.fontstyle = afs[i]; chkbox.Location = new Point(2 * cxText, (4 + 3 * i) * cyText / 2); chkbox.Size = new Size(12 * cxText, cyText); chkbox.CheckedChanged += new EventHandler(CheckBoxOnCheckedChanged); } } void CheckBoxOnCheckedChanged(object obj, EventArgs ea) { FontStyle fs = 0; Label label = null; for (int i = 0; i < Controls.Count; i++) { Control ctrl = Controls[i]; if (ctrl.GetType() == typeof(Label)) label = (Label) ctrl; else if (ctrl.GetType() == typeof(FontStyleCheckBox)) if (((FontStyleCheckBox) ctrl).Checked) fs |= ((FontStyleCheckBox) ctrl).fontstyle; } label.Font = new Font(label.Font, fs); } } class FontStyleCheckBox: CheckBox { public FontStyle fontstyle; } [/csharp]