誰能給我一個panel控件,像image一樣可以指定圖片的! |
尚未結案
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cqwty13062
一般會員 發表:2 回覆:3 積分:1 註冊:2004-10-18 發送簡訊給我 |
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hagar
版主 發表:143 回覆:4056 積分:4445 註冊:2002-04-14 發送簡訊給我 |
一個簡單的(只適用 Bitmap 的圖)
unit Unit4; interface uses Classes, SysUtils, Controls, ExtCtrls; type TImagePanel = class(TPanel) private FImage: TImage; protected procedure Paint; override; public constructor Create(AOwner: TComponent); override; destructor Destroy; override; published property Image: TImage read FImage write FImage; end; procedure Register; implementation procedure Register; begin RegisterComponents('Samples', [TImagePanel]); end; constructor TImagePanel.Create(AOwner: TComponent); begin inherited; FImage := TImage.Create(Self); end; destructor TImagePanel.Destroy; begin if Assigned(FImage) then FreeAndNil(FImage); inherited; end; procedure TImagePanel.Paint; begin inherited; if Assigned(FImage.Picture) then Canvas.StretchDraw(ClientRect, FImage.Picture.Bitmap); end; end.-- QBQ: 我能做什麼? |
cqwty13062
一般會員 發表:2 回覆:3 積分:1 註冊:2004-10-18 發送簡訊給我 |
|
hagar
版主 發表:143 回覆:4056 積分:4445 註冊:2002-04-14 發送簡訊給我 |
加入 Jpeg/Jpg 部份
unit ImagePanel; interface uses Classes, SysUtils, Controls, ExtCtrls, Graphics, Jpeg; type TImagePanel = class(TPanel) private FImage: TImage; protected procedure Paint; override; public constructor Create(AOwner: TComponent); override; destructor Destroy; override; published property Image: TImage read FImage write FImage; end; procedure Register; implementation procedure Register; begin RegisterComponents('Samples', [TImagePanel]); end; constructor TImagePanel.Create(AOwner: TComponent); begin inherited; FImage := TImage.Create(Self); end; destructor TImagePanel.Destroy; begin if Assigned(FImage) then FreeAndNil(FImage); inherited; end; procedure TImagePanel.Paint; var jpg: TJpegImage; bmp: TBitmap; begin inherited; if Assigned(FImage.Picture) then begin if FImage.Picture.Graphic is TBitmap then Canvas.StretchDraw(ClientRect, FImage.Picture.Bitmap); if FImage.Picture.Graphic is TJPegImage then begin jpg := TJpegImage.Create; try jpg.Assign(FImage.Picture.Graphic); bmp := TBitmap.Create; try bmp.Height := FImage.Height; bmp.Width := FImage.Width; bmp.Assign(jpg); Canvas.StretchDraw(ClientRect, bmp); finally bmp.Free; end; finally jpg.Free; end; end; end; end; end.您是動態 create TImagePanel 的嗎? 如果是的話, 看不到圖片的原因也許是沒指定 Parent 屬性 使用方式: var ip: TImagePanel; begin ip := TImagePanel.Create(Form1); ip.Parent := Form1; ip.Left := 30; ip.Top := 60; ip.Height := 120; ip.Width := 120; //ip.Image.Picture.LoadFromFile('C:\xx.bmp'); ip.Image.Picture.LoadFromFile('C:\xx.jpg'); end;-- QBQ: 我能做什麼? |
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