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在天极网上发布的各类delphi原码及技巧文档

 ReadFOnDrawItemwriteFOnDrawItem;<br>
 end;<br>
 procedureRegister;<br>
 <br>
 implementation<br>
 <br>
 procedureRegister;//注册构件<br>
 begin<br>
 RegisterComponents('Samples',[TColorComboBox]);<br>
 end;<br>
 <br>
 constructorTColorComboBox.Create<br>
 (AOwner:TComponent);//构件的初始化<br>
 begin<br>
 inheritedCreate(AOwner);<br>
 Style:=csOwnerDrawFixed; //构件的初始类型<br>
 ItemHeight :=20;<br>
 Font.Size:=10;<br>
 end;<br>
 <br>
 procedureTColorComboBox.CreateWnd;<br>
 //颜色构件的Items属性 初始化<br>
 begin<br>
 inheritedCreateWnd;<br>
 Items.Clear;<br>
 Items.Add('黑色');<br>
 Items.Add('蓝色');<br>
 Items.Add('蓝绿');<br>
 Items.Add('鲜绿');<br>
 Items.Add('粉红');<br>
 Items.Add('红色');<br>
 Items.Add('黄色');<br>
 Items.Add('白色');<br>
 Items.Add('深蓝');<br>
 Items.Add('青色');<br>
 Items.Add('绿色');<br>
 Items.Add('紫色');<br>
 Items.Add('深红');<br>
 Items.Add('深黄');<br>
 Items.Add('深灰');<br>
 Items.Add('银色');<big><br>
 </big> //若不需要这么 多颜色可在构件的items属性中删 除不需要的颜色<big><br>
 </big> end;<br>
 //重载DrawItem 过程<big><br>
 </big>procedureTColorComboBox.DrawItem(Index: Integer;Rect:TRect;State:TOwnerDrawState);<br>
 var<br>
 TempColor:TColor; //自画颜色<br>
 TempBrushColor:TColor; //临时颜色<br>
 begin<big><br>
 </big>//本 构件的默认自画设置<br>
 TempBrushColor:=Canvas.Brush.Color;<br>
 //保存原来的的颜色<br>
 Canvas.FillRect(Rect);<br>
 <br>
 ifItems[index]='黑色' then<br>
 TempColor:=clBlack<br>
 elseifItems[index]='蓝色' then<br>
 TempColor:=clBlue<br>
 elseifItems[index]='蓝绿' then<br>
 TempColor:=clAqua<br>
 elseifItems[index]='鲜绿' then<br>
 TempColor:=clLime<br>
 elseifItems[index]='粉红' then<br>
 TempColor:=clFuchsia<br>
 elseifItems[index]='红色' then<br>
 TempColor:=clRed<br>
 elseifItems[index]='黄色' then<br>
 TempColor:=clYellow<br>
 elseifItems[index]='白色' then<br>
 TempColor:=clWhite<br>
 elseifItems[index]='深蓝' then<br>
 TempColor:=clNavy<br>
 elseifItems[index]='青色' then<br>
 TempColor:=clTeal<br>
 elseifItems[index]='绿色' then<br>
 TempColor:=clGreen<br>
 elseifItems[index]='紫色' then<br>
 TempColor:=clPurple<br>
 elseifItems[index]='深红' then<br>
 TempColor:=clMaroon<br>
 elseifItems[index]='深黄' then<br>
 TempColor:=clOlive<br>
 elseifItems[index]='深灰' then<br>
 TempColor:=clGray<br>
 elseifItems[index]='银色' then<br>
 elseTempColor:=clSilver;<br>
 <br>
 Canvas.Brush.Color:=TempColor;<br>
 //自画颜色矩形<br>
 Canvas.Rectangle(Rect.Left+4,<br>
 Rect.Top+1,<br>
 (Rect.Right+Rect.Left)div3,<br>
 Rect.Bottom 1);<br>
 Canvas.Brush.Color:=TempBrushColor;<br>
 //显示与颜色对应的字符串<br>
 Canvas.TextOut((Rect.Left+Rect.Right)div2,<br>
 Rect.Top+1,<br>
 Items[Index]);<br>
 end;<br>
 end.</p>
 </blockquote>
 </blockquote>
 <p> 　　此控件可以在所有需要颜色选项的程序中使用而且非常方便和美观，并且使编程节省很多时间，增加了程序可靠性和可读性。</p>
 <p> <b>三、 自定义颜色对话框构件的使用</b><big><br>
 </big> 　　当注册完自定义颜色构件后，可以从Delphi构件模板的Sample页中选择自定义颜色构件,和使用Delphi本身构件没有区别。 
 <p></p>
 


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