Known Colors

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury,
Zach Greenvoss, Shripad Kulkarni, Neil Whitlow

Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace KnownColors
{
///

/// Summary description for KnownColors.
///

public class KnownColors : System.Windows.Forms.Form
{
private System.Windows.Forms.ComboBox comboBox1;
///

/// Required designer variable.
///

private System.ComponentModel.Container components = null;

ArrayList cAL;
ArrayList cNAL;

public KnownColors()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

this.Text = “Known non-system colors”;

cAL = new ArrayList(); // colors
cNAL = new ArrayList(); // strings
NonSystemColors(cAL, cNAL);
this.comboBox1.Sorted = true;
this.comboBox1.DataSource = cNAL; //set the combo's data source

//
// TODO: Add any constructor code after InitializeComponent call
//
}

///

/// Clean up any resources being used.
///

protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code
///

/// Required method for Designer support – do not modify
/// the contents of this method with the code editor.
///

private void InitializeComponent()
{
this.comboBox1 = new System.Windows.Forms.ComboBox();
this.SuspendLayout();
//
// comboBox1
//
this.comboBox1.Location = new System.Drawing.Point(8, 8);
this.comboBox1.Name = “comboBox1”;
this.comboBox1.Size = new System.Drawing.Size(121, 21);
this.comboBox1.TabIndex = 0;
this.comboBox1.Text = “comboBox1”;
//
// KnownColors
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.comboBox1});
this.Name = “KnownColors”;
this.Text = “KnownColors”;
this.ResumeLayout(false);

}
#endregion

///

/// The main entry point for the application.
///

[STAThread]
static void Main()
{
Application.Run(new KnownColors());
}
private void NonSystemColors(ArrayList cAL, ArrayList cNAL)
{
Array cA = Enum.GetValues(typeof(KnownColor));
foreach(KnownColor knwnC in cA) // cX.Length = 167
{
Color curC = Color.FromKnownColor(knwnC);
if(!curC.IsSystemColor)
{
cAL.Add(curC);
cNAL.Add(curC.Name.ToString());
}
}
}
protected override void OnPaint(PaintEventArgs pea)
{
Graphics g = pea.Graphics;
int wi = 70, hi = 12, rectNb = 8;
int cALNb = cAL.Count;

this.Width = (wi +2)*rectNb + 9;
int y = (int)(cALNb / rectNb);
this.Height = y*(2 + hi) + 60;

DisplayKnownColors(g, cALNb, wi, hi, rectNb);
g.Dispose();
}
private void DisplayKnownColors(Graphics g, int cALNb, int wi, int hi, int rectNb)
{
Rectangle rec;
Pen p = new Pen(this.ForeColor);
Brush b;

StringFormat strfmt = new StringFormat();
strfmt.LineAlignment = strfmt.Alignment = StringAlignment.Near;

int x, y;
for (int i = 0; i < cALNb; i++) { x = (int)(i % rectNb); y = (int)(i / rectNb); rec = new Rectangle(1 + x*(2 + wi), 1 + y*(2 + hi), wi, hi); g.DrawRectangle(p, rec); b = new SolidBrush((Color)cAL[i]); g.FillRectangle(b, rec); b = new SolidBrush(Color.Black); g.DrawString((string)cNAL[i], this.Font, b, rec, strfmt); } x = (int)(cALNb % rectNb); y = (int)(cALNb / rectNb); this.comboBox1.Location = new Point(x*(wi + 2) + 2, y*(2 + hi) + 2); } } } [/csharp]