PickColor Control 2004 Source Code....
//PickColor Control 2004 Source Code....
using System;
using System.Drawing;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.Text;
using System.Text.RegularExpressions;
namespace WMB.WebControls
{
[ToolboxBitmap(typeof(DropDownList)),
DefaultProperty("Text"),
ToolboxData("<{0}:ColorPick runat='server' />")]
public class ColorPick : Control, INamingContainer
{
// we need a textbox, a span and a table of which we can set or get properties
TextBox _TextBox = new TextBox();
Label _Label = new Label();
Table MainTable = new Table();
[Category("Data"),
Description("Set to true if you want to create the colortables serverside and send them to the browser."),
DefaultValue(false)]
public bool ShowColors
{
get
{
if (ViewState["ShowColors"] == null)
{
return false;//default value
}
else
{
return (bool)ViewState["ShowColors"];
}
}
set
{
if (value)
{
_Label.Style["visibility"] = "visible";
}
else
{
_Label.Style["visibility"] = "hidden";
}
MainTable.Visible = value;
ViewState["ShowColors"] = value;
}
}
[Category("Data"),
Description("Textbox text."),
DefaultValue("")]
public string Text
{
get
{
return _TextBox.Text;
}
set
{
Color c;
if (value.Trim() != "")
{
c = Color.FromName(value);
if (!c.IsKnownColor)
{
string hexvalue = Regex.Replace(value, "[^0-9a-fA-F]", "");
if (hexvalue.Length == 6)
{
c = ColorTranslator.FromHtml("#" + hexvalue);
value = ColorTranslator.ToHtml(c);
}
else
{
c = Color.White;
value = "#Error";
}
}
else
{
value = ColorTranslator.ToHtml(c);
}
}
else
{
c = Color.White;
}
if (c.GetBrightness() < 0.5)
{
_TextBox.Style["color"] = "white";
}
else
{
_TextBox.Style["color"] = "black";
}
_TextBox.Text = value;
_TextBox.Style["background-color"] = ColorTranslator.ToHtml(c);
}
}
protected override void OnInit(EventArgs e)
{
// set default visibility of the color tables
ShowColors = ShowColors;
//the textbox is added here in order to maintain viewstate
_TextBox.TextChanged += new EventHandler(TextBox_TextChanged);
_TextBox.AutoPostBack = true;
_TextBox.ID = "ColorField";
Controls.Add(_TextBox);
base.OnInit(e);
}
protected override void CreateChildControls()
{
//First we edit the main span
_Label.Style["position"] = "absolute";
_Label.ID = "ColorSpan";
//We need a table for layout and header
MainTable.Attributes.Add("style", "color:captiontext;background-color:threedface;border:2px threedhighlight outset;font-weight:bold;border-collapse:collapse;");
//this is our header row
TableRow MainTr = new TableRow();
MainTr.Style["background-color"] = "activecaption";
// this is the tablecell with the header text
TableCell MainTd = new TableCell();
MainTd.Style["padding-left"] = "5px";
MainTd.ColumnSpan = 2;
MainTd.HorizontalAlign = HorizontalAlign.Left;
MainTd.Text = "Colorpick 2004";
MainTr.Controls.Add(MainTd);
// this is tablecell with the closebutton
MainTd = new TableCell();
MainTd.HorizontalAlign = HorizontalAlign.Right;
// this is our closebutton
Button CloseButton = new Button();
CloseButton.Text = "x";
CloseButton.Attributes.Add("style", "font-weight:bold;width:20px;");
CloseButton.CausesValidation = false;
CloseButton.ToolTip = "Close";
CloseButton.Click += new EventHandler(ShowButton_Click);
// all add it to our layout table
MainTd.Controls.Add(CloseButton);
MainTr.Controls.Add(MainTd);
MainTable.Controls.Add(MainTr);
MainTr = new TableRow();
// lets create our colortables and add them to our maintable
Table ColorTable;
TableRow ColorTr = new TableRow();
TableCell ColorTd = new TableCell();
for (int i1 = 0; i1 <= 255; i1 += 51)
{
MainTd = new TableCell();
ColorTable = new Table();
for (int i2 = 0; i2 <= 255; i2 += 51)
{
ColorTr = new TableRow();
for (int i3 = 0; i3 <= 255; i3 += 51)
{
ColorTd = new TableCell();
Button ColorButton = new Button();
ColorButton.CssClass = "colorbutton";
Color c = Color.FromArgb(i1, i2, i3);
ColorButton.Style["background-color"] = ColorTranslator.ToHtml(c);
ColorButton.ToolTip = ColorButton.Style["background-color"];
ColorButton.CausesValidation = false;
ColorButton.Click += new EventHandler(ColorButton_Click);
ColorTd.Controls.Add(ColorButton);
ColorTr.Controls.Add(ColorTd);
}
ColorTable.Controls.Add(ColorTr);
}
MainTd.Controls.Add(ColorTable);
MainTr.Controls.Add(MainTd);
if (i1 == 102 || i1 == 255)
{
MainTable.Controls.Add(MainTr);
MainTr = new TableRow();
}
}
// add the table to _Label and _Label to control
_Label.Controls.Add(MainTable);
Controls.Add(_Label);
//let us create and add a button to show the colortables
Button ShowButton = new Button();
ShowButton.ID = "ShowButton";
ShowButton.Text = "...";
ShowButton.Style["width"] = "20px";
ShowButton.ToolTip = "Show colortables";
ShowButton.CausesValidation = false;
ShowButton.Click += new EventHandler(ShowButton_Click);
Controls.Add(ShowButton);
}
//here's three functions for the controls
private void ShowButton_Click(object sender, EventArgs e)
{
ShowColors = !ShowColors;
}
private void ColorButton_Click(object sender, EventArgs e)
{
this.Text = ((Button)sender).Style["background-color"];
ShowColors = false;
}
private void TextBox_TextChanged(object sender, EventArgs e)
{
this.Text = _TextBox.Text;
}
//we need lots of javascript which we create on prerender
protected override void OnPreRender(EventArgs e)
{
//if we don't have the javascript in our page yet we'll get it out of cache... and if it's not there... we'll create it
if (!Page.IsClientScriptBlockRegistered("WMBColorPick"))
{
string ClientScript = (string)HttpContext.Current.Cache.Get("WMBColorPick");
if (ClientScript == null)
{
StringBuilder sb = new StringBuilder();
sb.Append("<style type="text/css" media="screen">n");
sb.Append("tinput.colorbutton {border-style:None;height:10px;width:10px;cursor:pointer;}n<");
sb.Append("/style>n");
sb.Append("n");
sb.Append("<script language="JavaScript" type="text/javascript">n");
sb.Append("n");
sb.Append("function showbutton_click(elmnt){n");
sb.Append("telmnt=document.getElementById(elmnt);n");
sb.Append("tif(elmnt.style.visibility=='hidden'){n");
sb.Append("ttelmnt.style.visibility='visible';n");
sb.Append("tt}n");
sb.Append("telse {n");
sb.Append("ttelmnt.style.visibility='hidden';n");
sb.Append("t}n");
sb.Append("}n");
sb.Append("n");
sb.Append("function colorbutton_click(colorbutton, elmnt){n");
sb.Append("telmnt=document.getElementById(elmnt);n");
sb.Append("telmnt.style.backgroundColor=colorbutton.style.backgroundColor;n");
sb.Append("telmnt.value=colorbutton.title;n");
sb.Append("tvar bright = (parseInt(colorbutton.title.substr(1,2),16)+parseInt(colorbutton.title.substr(3,2),16)+parseInt(colorbutton.title.substr(5,2),16))/3;n");
sb.Append("tif(bright<=127){n");
sb.Append("ttelmnt.style.color = 'white';n");
sb.Append("tt}n");
sb.Append("telse {n");
sb.Append("ttelmnt.style.color = 'black';n");
sb.Append("t}n");
sb.Append("}n");
sb.Append("n");
sb.Append("function createcolortable(id){n");
sb.Append("var spanid = id + '_ColorSpan';n");
sb.Append("var textboxid = id + '_ColorField';n");
sb.Append("var buttonid = id + '_ShowButton';n");
sb.Append("n");
sb.Append("mytable = document.createElement('TABLE');n");
sb.Append("mytable.style.color='captiontext';n");
sb.Append("mytable.style.backgroundColor='threedface';n");
sb.Append("mytable.style.border='2px threedhighlight outset';n");
sb.Append("mytable.style.fontWeight='bold';n");
sb.Append("mytable.style.borderCollapse='collapse';n");
sb.Append("n");
sb.Append("mytablebody = document.createElement('TBODY');n");
sb.Append("n");
sb.Append("myrow=document.createElement('TR');n");
sb.Append("myrow.style.backgroundColor='activecaption';n");
sb.Append("n");
sb.Append("mycell=document.createElement('TD');n");
sb.Append("n");
sb.Append("mycell.colSpan = '2';n");
sb.Append("mycell.setAttribute('align','left');n");
sb.Append("mycell.style.paddingLeft='5px';n");
sb.Append("n");
sb.Append("celltext=document.createTextNode('ColorPick 2004');n");
sb.Append("mycell.appendChild(celltext);n");
sb.Append("n");
sb.Append("myrow.appendChild(mycell);n");
sb.Append("n");
sb.Append("mycell=document.createElement('TD');n");
sb.Append("mycell.setAttribute('align','right');n");
sb.Append("n");
sb.Append("closebutton=document.createElement('INPUT');n");
sb.Append("closebutton.type='submit';n");
sb.Append("closebutton.value='x';n");
sb.Append("closebutton.style.fontWeight='bold';n");
sb.Append("closebutton.style.width='20px';n");
sb.Append("closebutton['onclick']=new Function('showbutton_click("'+ spanid + '"); return false');n");
sb.Append("n");
sb.Append("closebutton.setAttribute('title', 'Close');n");
sb.Append("n");
sb.Append("n");
sb.Append("mycell.appendChild(closebutton);n");
sb.Append("n");
sb.Append("myrow.appendChild(mycell);n");
sb.Append("n");
sb.Append("mytablebody.appendChild(myrow);n");
sb.Append("n");
sb.Append("myrow=document.createElement('TR');n");
sb.Append("n");
sb.Append("for(i1=0;i1<6;i1++) {n");
sb.Append("tmycell=document.createElement('TD');n");
sb.Append("tmycolortable=document.createElement('TABLE');n");
sb.Append("tmycolortablebody=document.createElement('TBODY');n");
sb.Append("tttfor (i2=0; i2<6; i2++ ){n");
sb.Append("ttttmycolorrow=document.createElement('TR');n");
sb.Append("tttttfor (i3=0; i3<6; i3++ ){n");
sb.Append("ttttttmycolorcell=document.createElement('TD');n");
sb.Append("ttttttcolorbutton=document.createElement('INPUT');n");
sb.Append("ttttttcolorbutton.type='submit';n");
sb.Append("ttttttcolorbutton.value='';n");
sb.Append("ttttttcolorbutton.className = 'colorbutton' ;n");
sb.Append("ttttttvar hexcolor = '#' + toHex(i1) + toHex(i2) + toHex(i3);n");
sb.Append("ttttttcolorbutton.style.backgroundColor = hexcolor;n");
sb.Append("ttttttcolorbutton.setAttribute('title', hexcolor);n");
sb.Append("ttttttcolorbutton['onclick']=new Function('colorbutton_click(this,"' + textboxid + '"); return false');n");
sb.Append("ttttttmycolorcell.appendChild(colorbutton);n");
sb.Append("ttttttmycolorrow.appendChild(mycolorcell);n");
sb.Append("ttttt}n");
sb.Append("ttttmycolortablebody.appendChild(mycolorrow);n");
sb.Append("ttt}n");
sb.Append("ttmycolortable.appendChild(mycolortablebody);n");
sb.Append("ttmycell.appendChild(mycolortable);n");
sb.Append("ttmyrow.appendChild(mycell); n");
sb.Append("tn");
sb.Append("ttif ( i1 == 2 || i1 == 5 )n");
sb.Append("tt{n");
sb.Append("ttmytablebody.appendChild(myrow);n");
sb.Append("ttmyrow=document.createElement('TR');n");
sb.Append("tt}n");
sb.Append("}n");
sb.Append("mytable.appendChild(mytablebody);n");
sb.Append("var myspan = document.getElementById(spanid);n");
sb.Append("myspan.appendChild(mytable);n");
sb.Append("var showbutton = document.getElementById(buttonid);n");
sb.Append("showbutton['onclick']=new Function('showbutton_click("'+ spanid + '"); return false');n");
sb.Append("}n");
sb.Append("n");
sb.Append("function toHex(i){n");
sb.Append("tswitch(i){n");
sb.Append("tcase 0: {return '00';}n");
sb.Append("tcase 1: {return '33';}n");
sb.Append("tcase 2: {return '66';}n");
sb.Append("tcase 3: {return '99';}n");
sb.Append("tcase 4: {return 'CC';}n");
sb.Append("tcase 5: {return 'FF';}n");
sb.Append("t}n");
sb.Append("treturn '00';n");
sb.Append("}n<");
sb.Append("/script>");
ClientScript = sb.ToString();
HttpContext.Current.Cache.Insert("WMBColorPick", ClientScript);
}
Page.RegisterClientScriptBlock("WMBColorPick", ClientScript);
}
//create the colortables on pageload if we don't create them serverside
if (!ShowColors)
{
StringBuilder sb2 = new StringBuilder();
sb2.Append("<script language="JavaScript" type="text/javascript">");
sb2.Append("createcolortable('" + this.ID + "')<");
sb2.Append("/script>");
Page.RegisterStartupScript(this.ID, sb2.ToString());
}
base.OnPreRender(e);
}
}
}
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