//--------------------------------------------------------------------------
unit DrawListItem;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ImgList, jpeg, ExtCtrls;
type
TForm1 = class(TForm)
lsbRight: TListBox;
ImageList1: TImageList;
StaticText1: TStaticText;
lsbLeft: TListBox;
imgHouse: TImage;
imgHouseGray: TImage;
procedure FormCreate(Sender: TObject);
procedure lsbRightDrawItem(Control: TWinControl; Index: Integer;
Rect: TRect; State: TOwnerDrawState);
procedure lsbRightClick(Sender: TObject);
procedure FormShow(Sender: TObject);
procedure lsbLeftDrawItem(Control: TWinControl; Index: Integer;
Rect: TRect; State: TOwnerDrawState);
private
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
{========================================================================
DESIGN BY : 彭国辉
DATE: 2004-11-29
SITE: http://kacarton.yeah.net/
BLOG: http://blog.csdn.net/nhconch
EMAIL: kacarton#sohu.com
文章为作者原创，转载前请先与本人联系，转载请注明文章出处、保留作者信息，谢谢支持！
=========================================================================}
procedure TForm1.FormCreate(Sender: TObject);
var
i: integer;
begin
lsbRight.Style := lbOwnerDrawFixed;
lsbRight.Ctl3D := false;
lsbRight.ItemHeight := 50;
lsbRight.Items.Add('C++ Builder 研究 致力于BCB的学习探讨和研究'#13'ccrun(老妖)');
lsbRight.Items.Add('编程手札 My Developer Knowledge Base'#13'http://blog.csdn.net/nhconch'#13'天蝎蝴蝶');
for i:=3 to 10 do begin
lsbRight.Items.Add('ListBox Items of ' + IntTostr(i) + #13'Second of '
+ IntToStr(i) + #13'Third of ' + IntToStr(i));
end;
lsbLeft.Style := lbOwnerDrawFixed;
lsbLeft.Ctl3D := false;
lsbLeft.ItemHeight := 90;
lsbLeft.Items.Add('编程手札');
lsbLeft.Items.Add('My Developer Knowledge Base');
lsbLeft.Items.Add('站长:天蝎蝴蝶');
lsbLeft.Items.Add('http://blog.csdn.net/nhconch');
end;
procedure TForm1.lsbRightDrawItem(Control: TWinControl; Index: Integer;
Rect: TRect; State: TOwnerDrawState);
var
strTemp: String;
begin
//文字颜色
lsbRight.Canvas.Font.Color := clBlack;
//设置背景颜色并填充背景
lsbRight.Canvas.Brush.Color := clWhite;
lsbRight.Canvas.FillRect (Rect);
//设置圆角矩形颜色并画出圆角矩形
lsbRight.Canvas.Brush.Color := TColor($00FFF7F7);
lsbRight.Canvas.Pen.Color := TColor($00131315);
lsbRight.Canvas.RoundRect(Rect.Left + 3, Rect.Top + 3,
Rect.Right - 2, Rect.Bottom - 2, 8, 8);
//以不同的宽度和高度再画一次，实现立体效果
lsbRight.Canvas.RoundRect(Rect.Left + 3, Rect.Top + 3,
Rect.Right - 3, Rect.Bottom - 3, 5, 5);
//如果是当前选中项
if(odSelected in State) then
begin
//以不同的背景色画出选中项的圆角矩形
lsbRight.Canvas.Brush.Color := TColor($00FFB2B5);
lsbRight.Canvas.RoundRect(Rect.Left + 3, Rect.Top + 3,
Rect.Right - 3, Rect.Bottom - 3, 5, 5);
//选中项的文字颜色
lsbRight.Canvas.Font.Color := clBlue;
//如果当前项拥有焦点，画焦点虚框，当系统再绘制时变成XOR运算从而达到擦除焦点虚框的目的
if(odFocused in State) then DrawFocusRect(lsbRight.Canvas.Handle, Rect);
end;
//画出图标
ImageList1.Draw(lsbRight.Canvas, Rect.Left + 7,
Rect.top + (lsbRight.ItemHeight - ImageList1.Height) div 2, Index, true);
//分别绘出三行文字
strTemp := lsbRight.Items.Strings[Index];
lsbRight.Canvas.TextOut(Rect.Left + 32 + 10, Rect.Top + 4
, Copy(strTemp, 1, Pos(#13, strTemp)-1));
strTemp := Copy(strTemp, Pos(#13, strTemp)+1, Length(strTemp));
lsbRight.Canvas.TextOut(Rect.Left + 32 + 10, Rect.Top + 18,
Copy(strTemp, 1, Pos(#13, strTemp)-1));
lsbRight.Canvas.TextOut(Rect.Left + 32 + 10, Rect.Top + 32,
Copy(strTemp, Pos(#13, strTemp)+1, Length(strTemp)));
end;
procedure TForm1.lsbRightClick(Sender: TObject);
begin
StaticText1.Caption := ' ' + lsbRight.Items.Strings[lsbRight.ItemIndex];
end;
procedure TForm1.FormShow(Sender: TObject);
begin
lsbRight.ItemIndex := 0;
lsbRight.Repaint();
lsbLeft.ItemIndex := 0;
lsbLeft.Repaint();
end;
procedure TForm1.lsbLeftDrawItem(Control: TWinControl; Index: Integer;
Rect: TRect; State: TOwnerDrawState);
var
r: TRect;
begin
with lsbLeft.Canvas do begin
//设置填充的背景颜色并填充背景
Brush.Color := clWhite;
FillRect (Rect);
//绘制圆角矩形
if (odSelected in State) then //选中项的圆角矩形颜色
Pen.Color := $FFB2B5
else //未选中项的圆角矩形颜色
Pen.Color := clSilver;
Brush.Style := bsClear;
SetRect(r, Rect.Left+3, Rect.Top+3, Rect.Right-3, Rect.Bottom-3);
RoundRect(r.Left, r.Top, r.Right, r.Bottom, 10, 10);
//画出图标
if (odSelected in State) then //选中项的图像
Draw(r.Left + (r.Right - r.Left - imgHouse.Width) shr 1,
r.Top + 2, imgHouse.Picture.Graphic)
else //未选中项的图像
Draw(r.Left + (r.Right - r.Left - imgHouseGray.Width) shr 1,
r.Top + 2, imgHouseGray.Picture.Graphic);
//填充文字区背景
r.Top := r.Bottom - Abs(Font.Height) - 4;
Brush.Style := bsSolid;
if (odSelected in State) then //选中项的背景颜色
Brush.Color := $FFB2B5
else //未选中项的背景颜色
Brush.Color := clSilver;
FillRect(r);
//输出文字，仅支持单行
Font.Color := clBlack;
r.Top := r.Top + 2; //计算文字顶点位置，(水平居中,DT_CENTER不可用)
DrawText(Handle, PChar(TListBox(Control).Items.Strings[Index]), -1, r
, DT_CENTER or DT_END_ELLIPSIS{ or DT_WORDBREAK});
//画焦点虚框，当系统再绘制时，变成XOR运算，从而达到擦除焦点虚框的目的
if(odFocused in State) then DrawFocusRect(Rect);
end;
end;
end.
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