Listview自画图标模式

今天在盒子上看到Listview自画图标模式，效果不错，特发到Blog上，仅供参考。

 

效果图如下：

 

 

 

// 转载请注明 http://www.freedelphitips.comunit LauncherUnit;interfaceuses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, Buttons, ExtCtrls, ComCtrls, CommCtrl, ShellAPI, ImgList, StdCtrls;type Plistdata = ^Tlistdata; Tlistdata = record sName: string; desc: string; end;type TLauncherForm = class(TForm) ListView1: TListView; image_icon: TImageList; ImageList1: TImageList; pnl_tip: TPanel; img_t_l: TImage; img_t_m: TImage; img_t_r: TImage; pnl_bot: TPanel; img1: TImage; img2: TImage; img3: TImage; SpeedButton1: TSpeedButton; pnl_client: TPanel; img_c_l: TImage; img_c_r: TImage; pnl_line_l: TPanel; pnl_line_r: TPanel; procedure SpeedButton1Click(Sender: TObject); procedure ListView1Click(Sender: TObject); procedure FormShow(Sender: TObject); procedure FormResize(Sender: TObject); procedure FormCreate(Sender: TObject); procedure ListView1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer); procedure ListView1AdvancedCustomDrawItem(Sender: TCustomListView; Item: TListItem; State: TCustomDrawState; Stage: TCustomDrawStage; var DefaultDraw: Boolean); private procedure showdata(); public { Public declarations } end;var LauncherForm: TLauncherForm; listshortcut: tlist;implementation{$R *.dfm}procedure TLauncherForm.SpeedButton1Click(Sender: TObject);begin close;end;procedure TLauncherForm.ListView1Click(Sender: TObject);var s: string; ListData: Plistdata;begin if ListView1.ItemIndex < 0 then exit; ListData := listshortcut.Items[ListView1.ItemIndex]; s := ListData.desc; //得到对应数据的前地址 ShowMessage(s);end;procedure TLauncherForm.showdata();var ListData: Plistdata; i: integer;begin ListView1.Items.Clear; listshortcut.Clear; //建演示数据 for i := 0 to 15 do begin New(ListData); ListData.sName := '第' + inttostr(i) + '个名称'; ListData.desc := '说明第' + inttostr(i) + '个名称'; listshortcut.Add(ListData); end; for i := 0 to listshortcut.Count - 1 do //加空item ListView1.Items.add;end;procedure TLauncherForm.FormShow(Sender: TObject);var hr: thandle;begin //定义窗体园角 hr := createroundrectrgn(0, 0, width + 1, height + 1, 5, 5); //定义园角矩形(win API函数) setwindowrgn(handle, hr, true); //设置园角窗口 showdata;end;procedure TLauncherForm.FormResize(Sender: TObject);begin //showdata; Self.Repaint;end;procedure TLauncherForm.FormCreate(Sender: TObject);var imgList: TImageList;begin ListView1.DoubleBuffered := true; //启用双缓存，防止闪屏，但感觉没啥用 ListView1.Tag := -1; //记住 上次mouse所在item的id 这个tag一般不用正好用来做全局变量 listshortcut := tlist.Create; //----------------这里设置listView的LargeImages ,用imgList将其item放大 imgList := timagelist.Create(nil); imgList.Width := 49; imglist.Height := 49; ListView1.LargeImages := imgList; // SendMessage(ListView1.Handle, LVM_SETICONSPACING, 0, MakeLong(70, 70)); //设定icon的间距end;procedure TLauncherForm.ListView1MouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);var p: TPoint; li: TLIstItem; listindex: Integer; R: TRect; //R为文字覆盖的范围 imglistviewbk: TBitmap; //RFill为文字填充的范围 softicon: TBitmap; ListData: Plistdata;begin p.X := x; p.Y := y; li := ListView1.GetItemAt(p.x, p.y); listindex := (Sender as TListView).Items.IndexOf(li); if listindex = -1 then Exit; if ListView1.Items.Count = 0 then exit; if ListView1.Tag = -1 then //第一次进入一个item 画当前item begin ListView1.Tag := listindex; R := ListView1.Items[listindex].DisplayRect(drBounds); ListData := listshortcut.Items[listindex]; with ListView1.Canvas do begin imglistviewbk := TBitmap.Create; imglistviewbk.Width := ImageList1.Width; imglistviewbk.Height := ImageList1.Height; ImageList1.Draw(imglistviewbk.Canvas, 0, 0, 2, true); StretchDraw(r, imglistviewbk); //画背景图 //画图标 softicon := TBitmap.Create; softicon.Width := 32; softicon.Height := 32; image_icon.Draw(softicon.Canvas, 0, 0, listindex, true); Draw(r.Left + (r.Right - r.left - 32) div 2, r.top + 5, softicon); softicon.Free; //画软件名称 r.top := r.top + 40; r.Bottom := r.Bottom - 5; r.left := r.left + 3; r.right := r.right - 3; SetBkMode(Handle, TRANSPARENT); DrawText(Handle, PChar(ListData.sname), Length(ListData.sname), r, DT_WORDBREAK or DT_CENTER); end; with ListView1.Canvas do if Assigned(Font.OnChange) then Font.OnChange(Font); end else if (ListView1.Tag <> -1) and (ListView1.Tag <> listindex) then //如果是已有上次mouse所在位置id,同时本次mouse所在id与上次不同，则先画本次mouse所在id,同时将上次id的item画成默认的 begin //画当前item R := ListView1.Items[listindex].DisplayRect(drBounds); ListData := listshortcut.Items[listindex]; with ListView1.Canvas do begin imglistviewbk := TBitmap.Create; imglistviewbk.Width := ImageList1.Width; imglistviewbk.Height := ImageList1.Height; ImageList1.Draw(imglistviewbk.Canvas, 0, 0, 2, true); StretchDraw(r, imglistviewbk); //画背景图 //画图标 softicon := TBitmap.Create; softicon.Width := 32; softicon.Height := 32; image_icon.Draw(softicon.Canvas, 0, 0, listindex, true); Draw(r.Left + (r.Right - r.left - 32) div 2, r.top + 5, softicon); softicon.Free; //画软件名称 r.top := r.top + 40; r.Bottom := r.Bottom - 5; r.left := r.left + 3; r.right := r.right - 3; SetBkMode(Handle, TRANSPARENT); DrawText(Handle, PChar(ListData.sname), Length(ListData.sname), r, DT_WORDBREAK or DT_CENTER); end; //恢复上一个的颜色 R := ListView1.Items[ListView1.tag].DisplayRect(drBounds); ListData := listshortcut.Items[ListView1.tag]; with ListView1.Canvas do begin Brush.Color := clWhite; FillRect(r); //填充颜色 //画图标 softicon := TBitmap.Create; softicon.Width := 32; softicon.Height := 32; image_icon.Draw(softicon.Canvas, 0, 0, ListView1.tag, true); Draw(r.Left + (r.Right - r.left - 32) div 2, r.top + 5, softicon); softicon.Free; //画软件名称 r.top := r.top + 40; r.Bottom := r.Bottom - 5; r.left := r.left + 3; r.right := r.right - 3; SetBkMode(Handle, TRANSPARENT); DrawText(Handle, PChar(ListData.sname), Length(ListData.sname), r, DT_WORDBREAK or DT_CENTER); end; with ListView1.Canvas do if Assigned(Font.OnChange) then Font.OnChange(Font); ListView1.Tag := listindex; end;end;procedure TLauncherForm.ListView1AdvancedCustomDrawItem( Sender: TCustomListView; Item: TListItem; State: TCustomDrawState; Stage: TCustomDrawStage; var DefaultDraw: Boolean);var R: TRect; //R为文字覆盖的范围 imglistviewbk: TBitmap; //背景 softicon: TBitmap; //图标 ListData: Plistdata;begin R := Item.DisplayRect(drBounds); ListData := listshortcut.Items[Item.index]; with ListView1.Canvas do begin if cdsSelected in State then begin imglistviewbk := TBitmap.Create; imglistviewbk.Width := ImageList1.Width; imglistviewbk.Height := ImageList1.Height; ImageList1.Draw(imglistviewbk.Canvas, 0, 0, 0, true); StretchDraw(r, imglistviewbk); //画背景图 imglistviewbk.Free; end; //画图标 softicon := TBitmap.Create; softicon.Width := 32; softicon.Height := 32; image_icon.Draw(softicon.Canvas, 0, 0, Item.index, true); Draw(r.Left + (r.Right - r.left - 32) div 2, r.top + 5, softicon); softicon.Free; //// 画软件名称 r.top := r.top + 40; r.Bottom := r.Bottom - 5; r.left := r.left + 3; r.right := r.right - 3; SetBkMode(Handle, TRANSPARENT); //设定文字为透明 DrawText(Handle, PChar(ListData.sname), Length(ListData.sname), r, DT_WORDBREAK or DT_CENTER); end; with Sender.Canvas do if Assigned(Font.OnChange) then Font.OnChange(Font);end;end.