在网上有很多文章都提到怎样在菜单中加入背景图片,可是都没有一个完整的回答,也没有一个比较完整的例子。当然csdn曾经有一个高人说过这个问题,而且在程序员大本营2000版中也有收藏。我参考了一些方法和技巧,当然包括国外的了,写下了如下的代码,希望能够满足大家的要求,不过不是很完善,如果有哪位大侠修改过,不妨也将修改过的代码贴出来,大家共享!为了在menu控件中加入背景图片,没有直接的方法,都的靠自己动手画,因为menu控件没有canvas属性,所以只能自己动手了!这个东西我也是菜鸟一只,说不出什么高深的东西,如果有什么问题可以发信给我,我们共同探讨:cqwty@sina.com,源代码如下:
unit FMain;
interface
uses Windows, Graphics, Forms, Menus, Classes;
type TfrmMain = class(TForm) mnuPopup: TPopupMenu; MainMenu1: TMainMenu; sdfsdf1: TMenuItem; sdfsdf2: TMenuItem; dfgdfg1: TMenuItem; dfgdfg2: TMenuItem; N1: TMenuItem; werwer1: TMenuItem;
procedure DrawMenu(Sender: TObject; ACanvas: TCanvas; ARect: TRect; State: TOwnerDrawState); procedure MeasureMenu(Sender: TObject; ACanvas: TCanvas; var Width, Height: Integer); procedure FormCreate(Sender: TObject); procedure FormClose(Sender: TObject; var Action: TCloseAction); end;
var frmMain: TfrmMain; bmp1:tbitmap; implementation
{$R *.DFM}
procedure TfrmMain.DrawMenu(Sender: TObject; ACanvas: TCanvas; ARect: TRect; State: TOwnerDrawState); var cTemp: TCanvas; sText: String; mWnd: HWND; rMenu: TRect;
begin
ACanvas.BrushCopy(ARect, bmp1, ARect, clBlack); ACanvas.Brush.Style := bsclear; sText := TMenuItem(Sender).Caption; acanvas.Font.Color:=clred; with ACanvas do begin if odSelected in State then begin pen.Style:=psInsideFrame; Brush.Color := RGB(110, 131, 184); Pen.Color := RGB(47, 60, 93); Rectangle(ARect); end;
if sText = '-' then begin // Draw line ACanvas.Pen.Color := RGB(0, 0, 0); MoveTo(ARect.Left, ARect.Top + ((ARect.Bottom - ARect.Top) div 2)); LineTo(ARect.Right, ARect.Top + ((ARect.Bottom - ARect.Top) div 2)); end else begin // Draw text Inc(ARect.Left, 12); DrawText(Handle, PChar(sText), Length(sText), ARect, DT_LEFT or DT_VCENTER or DT_SINGLELINE); end; end;
// 画边框的,效果是平面的 mWnd := WindowFromDC(ACanvas.Handle);
if mWnd <> Self.Handle then begin cTemp := TCanvas.Create(); cTemp.Handle := GetDC(0);
Windows.GetWindowRect(mWnd, rMenu);
cTemp.Brush.Color := RGB(120, 120, 120); cTemp.FrameRect(rMenu);
InflateRect(rMenu, -1, -1); cTemp.Brush.Color := RGB(240, 240, 240); cTemp.FrameRect(rMenu);
InflateRect(rMenu, -1, -1); cTemp.FrameRect(rMenu);
ReleaseDC(0, cTemp.Handle); cTemp.Free();
end;
end;
procedure TfrmMain.MeasureMenu(Sender: TObject; ACanvas: TCanvas; var Width, Height: Integer); begin Inc(Width,50);//调整菜单的宽度
inc(height,15);//调整每一个item的高度,这一句可以不要,使用默认值 end;
procedure TfrmMain.FormCreate(Sender: TObject); begin bmp1:=tbitmap.Create; bmp1.loadfromfile('e:\aaa.bmp'); end;
procedure TfrmMain.FormClose(Sender: TObject; var Action: TCloseAction); begin bmp1.Free; end;
end.
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