請問Panel 繪圖後如何儲存成影像檔 |
答題得分者是:taishyang
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wslay
一般會員 發表:1 回覆:3 積分:0 註冊:2008-02-27 發送簡訊給我 |
請教版上先進,我從網上瞭解如何在Panel物件上繪圖而且也可以完成作業,
可是另外問題是我該如何把已經畫在Panel上的圖形儲存下來 我試過從Canvas當中的Bitmap Assign到TBitmap物件上,顯示出nil得錯誤訊息 以下為如何在Panel上繪圖的程式碼 [code cpp] TCanvas *pCanvas = new TCanvas; HDC hDC=GetDC(Panel1->Handle); pCanvas->Handle=hDC; pCanvas->Pen->Color = Color; pCanvas->Pen->Width = 5; pCanvas->Pen->Mode = pmCopy; pCanvas->Pen->Style = psSolid; pCanvas->Brush->Color = Color; pCanvas->Brush->Style = bsClear; pCanvas->Rectangle(0,0,50,50); ReleaseDC(Panel1->Handle , hDC); delete pCanvas; [/code] |
taishyang
站務副站長 發表:377 回覆:5490 積分:4563 註冊:2002-10-08 發送簡訊給我 |
試試下面的程式碼
Graphics::TBitmap *bmp = new Graphics::TBitmap; bmp->Width = Panel1->Width; bmp->Height = Panel1->Height; TCanvas *pCanvas = new TCanvas; HDC hDC=GetDC(Panel1->Handle); pCanvas->Handle=hDC; pCanvas->Pen->Color = clBlue; pCanvas->Pen->Width = 5; pCanvas->Pen->Mode = pmCopy; pCanvas->Pen->Style = psSolid; pCanvas->Brush->Color = Color; pCanvas->Brush->Style = bsClear; pCanvas->Rectangle(0,0,50,50); bmp->Canvas->CopyRect(Panel1->ClientRect, pCanvas, Panel1->ClientRect); bmp->SaveToFile("panel.bmp"); ReleaseDC(Panel1->Handle , hDC); delete pCanvas; delete bmp; |
wslay
一般會員 發表:1 回覆:3 積分:0 註冊:2008-02-27 發送簡訊給我 |
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