palwindow.h

Windows 图形编程 书籍

//-----------------------------------------------------------------------------------//
//              Windows Graphics Programming: Win32 GDI and DirectDraw               //
//                             ISBN  0-13-086985-6                                   //
//                                                                                   //
//  Written            by  Yuan, Feng                             www.fengyuan.com   //
//  Copyright (c) 2000 by  Hewlett-Packard Company                www.hp.com         //
//  Published          by  Prentice Hall PTR, Prentice-Hall, Inc. www.phptr.com      //
//                                                                                   //
//  FileName   : palwindow.h					                                     //
//  Description: Palette window                                                      //
//  Version    : 1.00.000, May 31, 2000                                              //
//-----------------------------------------------------------------------------------//

void AnalyzePalette(PALETTEENTRY entry[], int no, TCHAR mess[]);
BOOL Switch8bpp(void);

class KPaletteWnd : public KWindow
{
	HDC			 m_hDC;
	TCHAR		 m_name[MAX_PATH];
	PALETTEENTRY m_Entry[256];
	int			 m_nEntry;
	int			 m_nGeneration;

	virtual LRESULT WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
	{
		switch ( uMsg )
		{
			case WM_CREATE:
				m_hWnd   = hWnd;
				m_hDC    = GetDC(m_hWnd);
				m_nEntry = GetSystemPaletteEntries(m_hDC, 0, 256, m_Entry);
				m_nGeneration = 0;
				_tcscpy(m_name, "Original");
				return 0;

			case WM_MOUSEMOVE:
				{
					COLORREF cr = GetPixel(m_hDC, LOWORD(lParam), HIWORD(lParam));
					TCHAR temp[32];
					wsprintf(temp, "RGB(%02X, %02X, %02X)   ", GetRValue(cr), GetGValue(cr), GetBValue(cr));
					TextOut(m_hDC, 10, 310, temp, _tcslen(temp));
				}
				return 0;

			case WM_PAINT:
				{
					PAINTSTRUCT ps;

					HDC hDC = BeginPaint(hWnd, & ps);

					TextOut(hDC, 10, 10, m_name, _tcslen(m_name));

					HDC hMemDC = CreateCompatibleDC(hDC);
					HGDIOBJ hOld;
	
					BYTE data[80][80];

					for (int i=0; i<80; i++)
					for (int j=0; j<80; j++)
					{
						data[i][j] = (i/5) * 16 + (j/5);
						if ( ((i%5)==0) || ((j%5)==0) )
							data[i][j] = 255;
					}

					HBITMAP hBitmap = CreateBitmap(80, 80, 1, 8, data);

					hOld = SelectObject(hMemDC, hBitmap);

					StretchBlt(hDC, 10, 45, 256, 256, hMemDC, 0, 0, 80, 80, SRCCOPY);

					SelectObject(hMemDC, hOld);
					DeleteObject(hBitmap);
					DeleteObject(hMemDC);

					TCHAR temp[64];
					AnalyzePalette(m_Entry, m_nEntry, temp);
					TextOut(hDC, 10, 25, temp, _tcslen(temp));

					wsprintf(temp, "System Palette [%d]", m_nGeneration);
					SetWindowText(hWnd, temp);
					EndPaint(hWnd, & ps);
				}
				return 0;

			case WM_PALETTECHANGED:
			{
				PALETTEENTRY m_New[256];

				GetSystemPaletteEntries(m_hDC, 0, 256, m_New);

				int diff = 0;
				for (int i=0; i<m_nEntry; i++)
					if ( memcmp(& m_New[i], & m_Entry[i], sizeof(PALETTEENTRY)) )
						diff ++;

				wsprintf(m_name, "%d entries changed by window(%x) ", diff, wParam);
				GetWindowModuleFileName((HWND) wParam, m_name + _tcslen(m_name), MAX_PATH - _tcslen(m_name));

				memcpy(m_Entry, m_New, sizeof(m_New));
				m_nGeneration ++;

				InvalidateRect(hWnd, NULL, TRUE);
			}
				return 0;

			case WM_NCDESTROY:
				ReleaseDC(m_hWnd, m_hDC);
				return 0;
		}

		return DefWindowProc(hWnd, uMsg, wParam, lParam);
	}

public:

	void CreatePaletteWindow(HINSTANCE hInst)
	{
		if ( ! Switch8bpp() )
			return;

		CreateEx(0, _T("SysPal"), _T("System Palette"), WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN,
			CW_USEDEFAULT, CW_USEDEFAULT, 290, 370, NULL, NULL, hInst);
			ShowWindow(SW_NORMAL);
			UpdateWindow();
	}
};