readme.wzd

《vc++扩展编程实例》源码。运用Visual C++ 5.0或6.0的高级编程技巧

/////////////////////////////////////////////////////////////////////
// Example files.
/////////////////////////////////////////////////////////////////////

clrpage.cpp -- a property page class that allows a user to move slide bars
clrpage.h			to pick an exact on-diffused color

WzdPrjct.h -- system registry keys to save custom color values

/////////////////////////////////////////////////////////////////////
// Modify the project resource file.
/////////////////////////////////////////////////////////////////////

// 1) add the following dialog box template to your resources
IDD_COLOR_PAGE DIALOG DISCARDABLE  0, 0, 175, 108
STYLE WS_CHILD | WS_CAPTION
CAPTION "Color"
FONT 8, "MS Sans Serif"
BEGIN
    CONTROL         "",IDC_COLOR1_DISPLAY,"Static",SS_BLACKFRAME | SS_SUNKEN | 
                    NOT WS_VISIBLE,32,18,30,26
    CONTROL         "Slider1",IDC_RED_SLIDER1,"msctls_trackbar32",TBS_VERT | 
                    TBS_BOTH | TBS_NOTICKS | WS_TABSTOP,83,15,19,26
    CONTROL         "Slider1",IDC_GRN_SLIDER1,"msctls_trackbar32",TBS_VERT | 
                    TBS_BOTH | TBS_NOTICKS | WS_TABSTOP,109,15,19,26
    CONTROL         "Slider1",IDC_BLUE_SLIDER1,"msctls_trackbar32",TBS_VERT | 
                    TBS_BOTH | TBS_NOTICKS | WS_TABSTOP,131,15,19,26
    GROUPBOX        "Color 1",IDC_STATIC,22,7,132,45
    CONTROL         "",IDC_COLOR2_DISPLAY,"Static",SS_BLACKFRAME | SS_SUNKEN | 
                    NOT WS_VISIBLE,31,67,30,26
    CONTROL         "Slider1",IDC_RED_SLIDER2,"msctls_trackbar32",TBS_VERT | 
                    TBS_BOTH | TBS_NOTICKS | WS_TABSTOP,83,67,19,26
    CONTROL         "Slider1",IDC_GRN_SLIDER2,"msctls_trackbar32",TBS_VERT | 
                    TBS_BOTH | TBS_NOTICKS | WS_TABSTOP,109,67,19,26
    CONTROL         "Slider1",IDC_BLUE_SLIDER2,"msctls_trackbar32",TBS_VERT | 
                    TBS_BOTH | TBS_NOTICKS | WS_TABSTOP,131,66,19,26
    GROUPBOX        "Color 2",IDC_STATIC,21,57,132,47
    LTEXT           "Red",IDC_STATIC,83,41,14,8
    LTEXT           "Red",IDC_STATIC,81,92,14,8
    LTEXT           "Green",IDC_STATIC,105,41,20,8
    LTEXT           "Green",IDC_STATIC,105,92,20,8
    LTEXT           "Blue",IDC_STATIC,131,41,15,8
    LTEXT           "Blue",IDC_STATIC,131,92,15,8
END

/////////////////////////////////////////////////////////////////////
// Modify the Mainframe Class.
/////////////////////////////////////////////////////////////////////

// 1) add the following functions and variables to this class's include file

// Operations
public:
	void LoadOptions();
	void SaveOptions();

	void SetColorRef(int id,COLORREF rgb){m_rgbColors[id]=rgb;};
	CPalette *GetPalette(){return m_pPalette;};

/////////////////

private:
	COLORREF	m_rgbColors[NUM_COLORS];
	CColorPage	*m_pColorPage;
	CPalette	*m_pPalette;

	void CreatePalette();



// 2) initialize the color values in the constructor
CMainFrame::CMainFrame()
{
	m_rgbColors[COLOR1_COLOR]=RGB(200,20,150);
	m_rgbColors[COLOR2_COLOR]=RGB(0,200,100);
	m_pPalette=NULL;
}

// 3) destroy the palette we are about o make in the destructor
CMainFrame::~CMainFrame()
{
	m_pPalette->DeleteObject();
	delete m_pPalette;
	m_pPalette=NULL;
}

// 4) load custom color values from system registry and create
// a palette using two helper functions:
int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CMDIFrameWnd::OnCreate(lpCreateStruct) == -1)
		return -1;

	LoadOptions(); //<<<<<
	CreatePalette(); //<<<<
	

	return 0;
}

// 5) save custom color values using one helper function
void CMainFrame::OnClose() 
{
	SaveOptions();
	
	CMDIFrameWnd::OnClose();
}

// 6) the helper function that loads color values from system registry:
void CMainFrame::LoadOptions()
{
	BYTE *p;
	UINT size;
	if (AfxGetApp()->GetProfileBinary(SETTINGS_KEY,COLORS_KEY,&p,&size))
	{
		memcpy(m_rgbColors,p,size);
		delete []p;
	}
}

// 7) the helper function that saves color values to system registry:
void CMainFrame::SaveOptions()
{
	UINT size=sizeof(m_rgbColors);
	AfxGetApp()->WriteProfileBinary(SETTINGS_KEY,COLORS_KEY,(BYTE*)m_rgbColors,size);
}

// 8) initialize the color propery page and add to application's preferences
void CMainFrame::OnOptionsPreferences() 
{
	CPropertySheet sheet(_T("Preferences"),this);
	m_pColorPage=new CColorPage;

	sheet.AddPage(m_pColorPage);

	m_pColorPage->m_rgbColors[COLOR1_COLOR] = m_rgbColors[COLOR1_COLOR];
	m_pColorPage->m_rgbColors[COLOR2_COLOR] = m_rgbColors[COLOR2_COLOR];

	sheet.DoModal();

	delete m_pColorPage;
}

// 9) the helper function that creates a custom palette 
void CMainFrame::CreatePalette() 
{
   LOGPALETTE *lp = (LOGPALETTE *)calloc( 1, sizeof(LOGPALETTE) + 
		(NUM_COLORS * sizeof(PALETTEENTRY)) );
   lp->palVersion = 0x300;  
   lp->palNumEntries = NUM_COLORS;
   for (int i=0; i<NUM_COLORS; i++)
   {
      lp->palPalEntry[i].peRed=GetRValue(m_rgbColors[i]);
      lp->palPalEntry[i].peGreen=GetGValue(m_rgbColors[i]);
      lp->palPalEntry[i].peBlue=GetBValue(m_rgbColors[i]);
	  // reserve for animation
	  lp->palPalEntry[i].peFlags = PC_RESERVED; 

   }
	if (m_pPalette) delete m_pPalette;
   m_pPalette = new CPalette;
   m_pPalette->CreatePalette(lp);
   free(lp);
}

/////////////////////////////////////////////////////////////////////
// Modify any class that can draw to a window.
/////////////////////////////////////////////////////////////////////

// 1) select palette into device context and realize colors 
	CPalette *pOPalette=pDC->SelectPalette(((CMainFrame*)AfxGetMainWnd())->GetPalette(),FALSE);
	pDC->RealizePalette();

// 2) create our objects and select into device context
	CPen pen(PS_SOLID,3,PALETTEINDEX(COLOR1_COLOR));
	CPen *pOPen=pDC->SelectObject(&pen);
	CBrush brush(PALETTEINDEX(COLOR2_COLOR));
	CBrush *pOBrush=pDC->SelectObject(&brush);

// 3) draw object(s)
	pDC->Rectangle(10,10,200,200);

// 4) unselect everything
	pDC->SelectObject(pOPen);
	pDC->SelectObject(pOBrush);
	pDC->SelectPalette(pOPalette,FALSE);


/////////////////////////////////////////////////////////////////////
// From: Visual C++ MFC Programming by Example by John E. Swanke
// Copyright (C) 1999 jeswanke. All rights reserved.
/////////////////////////////////////////////////////////////////////