MFC非模态窗口gdi+自绘图片

新建 Dialog based MFC项目DrawImage

在资源中新添加一个Dialog，IDD_PICBOXDLG

在此dialog上添加Pictre Contrl

shift+ctrl+x 添加对应的类:CPicBoxDlg

DrawImage.cpp中加入：

CPicBoxDlg* g_Dlg=NULL;

DrawImageDlg.cpp中：

extern CPicBoxDlg* g_Dlg;

在资源面板找到DrawImage窗口添加按钮，双击添加事件

void CDrawImgDlg::OnBnClickedButton1()

{

// TODO: Add your control notification handler code here

if(g_Dlg == NULL)

{

g_Dlg = new CPicBoxDlg;

if(g_Dlg->Create(IDD_PICBOXDLG, this))

{ 

g_Dlg->ShowPicBox(g_Dlg->GetSafeHwnd());

g_Dlg->ShowWindow(SW_SHOWNORMAL);

::AnimateWindow(g_Dlg->GetSafeHwnd(), 300, AW_BLEND);

::SetForegroundWindow(g_Dlg->GetSafeHwnd());

}

//CPicBoxDlg dlg;

//dlg.DoModal();

}

}

项目添加BmpFram.h

#pragma once

#include <xstring>

#include <GdiPlus.h>

using namespace std;

using namespace Gdiplus;

// CBmpFrame

class CBmpFrame : public CStatic {

DECLARE_DYNAMIC(CBmpFrame)

public:

CBmpFrame(CWnd* m_pWnd, wstring wsImgPath, BOOL fIsTransparentBg = FALSE, COLORREF rgbColor = NULL);

CBmpFrame(CWnd* m_pWnd, UINT uiBmpID, BOOL fIsTransparentBg = TRUE, COLORREF rgbColor = #ffffff);

virtual ~CBmpFrame();

private:

GdiplusStartupInput m_gdiplusStartupInput;

ULONG_PTR m_pGdiToken;

CBitmap m_bmpSource;

BITMAP m_bmSource;

CWnd* m_pWnd;

UINT m_uiBmpID;

wstring m_wsImgPath;

BOOL m_fIsTransparentBg;

COLORREF m_rgbColor;

BOOL m_fIsGdiplus;

public:

void Draw(CDC *pDC);

protected:

DECLARE_MESSAGE_MAP()

public:

afx_msg void OnPaint();

};

BmpFrame.cpp

// BmpBox.cpp : implementation file

//

#include "stdafx.h"

#include "BmpFrame.h"

#ifndef ULONG_PTR

#define ULONG_PTR unsigned long*

#include <GdiPlus.h>

using namespace Gdiplus;

#endif

#pragma comment(lib,"gdiplus.lib")

// CBmpFrame

IMPLEMENT_DYNAMIC(CBmpFrame, CStatic)

CBmpFrame::CBmpFrame(CWnd* pWnd, wstring wsImgPath, BOOL fIsTransparentBg, COLORREF rgbColor)

{

GdiplusStartup(&m_pGdiToken,&m_gdiplusStartupInput,NULL);

m_pWnd = pWnd;

m_wsImgPath = wsImgPath;

m_fIsTransparentBg = fIsTransparentBg;

m_fIsGdiplus = TRUE;

}

CBmpFrame::CBmpFrame(CWnd* pWnd, UINT uiBmpID, BOOL fIsTransparentBg, COLORREF rgbColor)

{

GdiplusStartup(&m_pGdiToken,&m_gdiplusStartupInput,NULL);

m_pWnd = pWnd;

m_uiBmpID = uiBmpID;

m_fIsTransparentBg = fIsTransparentBg;

m_rgbColor = rgbColor;

m_fIsGdiplus = FALSE;

}

CBmpFrame::~CBmpFrame() 

{

GdiplusShutdown(m_pGdiToken);

}

BEGIN_MESSAGE_MAP(CBmpFrame, CStatic)

ON_WM_PAINT()

END_MESSAGE_MAP()

void CBmpFrame::Draw(CDC *pDC)

{

CRect rectWnd;

GetClientRect(&rectWnd);

CDC* pCDC = new CDC;

//CPaintDC paintDC(m_pWnd);

pCDC->CreateCompatibleDC(pDC);

if(m_fIsGdiplus)

{

//使用gdi+绘图，并做平滑处理

Graphics graphics(pDC->GetSafeHdc());

graphics.SetSmoothingMode(SmoothingModeAntiAlias);

graphics.SetInterpolationMode(InterpolationModeHighQuality);

//InterpolationModeHighQualityBilinear

//InterpolationModeHighQualityBicubic

Gdiplus::Image* pImage = new Gdiplus::Image(m_wsImgPath.data(), FALSE);

if(pImage == NULL)

{

MessageBox(L"Gdiplus::Image is NULL.");

return;

}

if(m_fIsTransparentBg)

{

ImageAttributes imAtt;

imAtt.SetColorKey(m_rgbColor, m_rgbColor, ColorAdjustTypeDefault);

graphics.DrawImage(pImage, Rect(0, 0, rectWnd.Width(), rectWnd.Height()), 0, 0, pImage->GetWidth(), pImage->GetHeight(), UnitPixel, &imAtt);

}

else

{

graphics.DrawImage(pImage, Rect(0, 0, rectWnd.Width(), rectWnd.Height()), 0, 0, pImage->GetWidth(), pImage->GetHeight(), UnitPixel, NULL);

}

delete pImage;

pImage = NULL;

}

else

{

//一般绘图

m_bmpSource.DeleteObject();

m_bmpSource.LoadBitmap(m_uiBmpID);

m_bmpSource.GetObject(sizeof(BITMAP), &m_bmSource);

if(m_fIsTransparentBg)

{

pDC->TransparentBlt(0,0,rectWnd.Width(), rectWnd.Height(), pCDC,0,0, m_bmSource.bmWidth, m_bmSource.bmWidth, m_rgbColor);

}

else

{

pDC->StretchBlt(0,0,rectWnd.Width(), rectWnd.Height(), pCDC,0,0, m_bmSource.bmWidth, m_bmSource.bmWidth, SRCCOPY);

}

}

pCDC->DeleteDC();

}

void CBmpFrame::OnPaint()

{

CPaintDC dc(this); // device context for painting

// TODO: Add your message handler code here

// Do not call CStatic::OnPaint() for painting messages

Draw(&dc);

}

PicBoxDlg.h

#pragma once

#include "BmpFrame.h"

// CPicBoxDlg dialog

class CPicBoxDlg : public CDialog

{

DECLARE_DYNAMIC(CPicBoxDlg)

CBmpFrame m_bmpFrame;

public:

CPicBoxDlg(CWnd* pParent = NULL);   // standard constructor

virtual ~CPicBoxDlg();

// Dialog Data

enum { IDD = IDD_PICBOXDLG };

protected:

virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

DECLARE_MESSAGE_MAP()

};

PicBoxDlg.cpp

// CPicBoxDlg.cpp : implementation file

//

#include "stdafx.h"

#include "DrawImg.h"

#include "PicBoxDlg.h"

// CPicBoxDlg dialog

IMPLEMENT_DYNAMIC(CPicBoxDlg, CDialog)

CPicBoxDlg::CPicBoxDlg(CWnd* pParent /*=NULL*/)

: CDialog(CPicBoxDlg::IDD, pParent)

, m_bmpFrame(NULL, L"./res/cross.png")

{

}

CPicBoxDlg::~CPicBoxDlg()

{

}

void CPicBoxDlg::DoDataExchange(CDataExchange* pDX)

{

CDialog::DoDataExchange(pDX);

DDX_Control(pDX, IDC_PICBOX, m_bmpFrame);

}

BEGIN_MESSAGE_MAP(CPicBoxDlg, CDialog)

END_MESSAGE_MAP()