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How to Display a TListBox with alternating colors. Turn on/off line numbers in source code. Switch to Orginial background IDE or DSP color Comment or reply to this aritlce/tip for discussion. Bookmark this article to my favorite article(s). Print this article
Display a TListBox with alternating colors 08-Jul-04
Category
VCL-General
Language
CBuilder All Versions
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421
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Publisher:
Darley, F. Joe
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			1   
2   //---------------------------------------------------------------------------
3   
4   #include <vcl.h>
5   
6   #pragma hdrstop
7   
8   #include "Unit1.h"
9   //---------------------------------------------------------------------------
10  #pragma package(smart_init)
11  #pragma resource "*.dfm"
12  TForm1 *Form1;
13  //---------------------------------------------------------------------------
14  __fastcall TForm1::TForm1(TComponent* Owner)
15          : TForm(Owner)
16  {
17  }
18  //---------------------------------------------------------------------------
19  
20  //Select the listbox style lbOwnerDrawFixed in the object inspector.
21  
22  void __fastcall TForm1::Button1Click(TObject *Sender)
23  {
24   ListBox1->AddItem("Test",NULL);
25   Application->ProcessMessages();
26   ListBox1->AddItem("Test II",NULL);
27    Application->ProcessMessages();
28   ListBox1->AddItem("Test III",NULL);
29  }
30  //---------------------------------------------------------------------------
31  void __fastcall TForm1::ListBox1DrawItem(TWinControl *Control, int Index,
32        TRect &Rect, TOwnerDrawState State)
33  {
34  TColor ListColor;
35  TBrush *ListBrush= new TBrush ;
36  AnsiString sText;
37  String sText2;
38       // ListBox1->Canvas->Brush
39  
40      if ((Index % 2)==1){
41        ListColor = clSilver; }
42      else{
43        ListColor = clBlue;}
44  
45      ListBrush->Style = bsSolid;
46      ListBrush->Color = ListColor;
47      ::FillRect(Handle, &Rect, ListBrush->Handle);
48      ListBox1->Canvas->Brush->Style = bsClear;
49  
50      // write out the text
51       sText =  ListBox1->Items[Index].Text;
52  
53       ListBox1->Canvas->TextOut(Rect.Left, Rect.Top,sText);
54  
55      ListBrush->Free();
56  
57  
58  }
59  //---------------------------------------------------------------------------


			
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