打印本文 打印本文 关闭窗口 关闭窗口
自绘ListBox的两种效果
作者:武汉SEO闵涛  文章来源:敏韬网  点击数1937  更新时间:2009/4/23 18:28:22  文章录入:mintao  责任编辑:mintao

  本文利用Listbox自绘实现了两种特殊效果,其中第两种风格来自C++ Builder 研究 www.ccrun.com,老妖用BCB实现了,现在把它转换成Delphi代码。

演示图片:
自绘ListBox的效果

//--------------------------------------------------------------------------

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
www.ccrun.com''''#13''''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;

[1] [2]  下一页

打印本文 打印本文 关闭窗口 关闭窗口