shapes.cpp

Programming.Microsoft.Windows.CE.Dot.NET.3rd.Edition.pdf the chapter 2 example codes.

//======================================================================
// Shapes- Brush and shapes demo for Windows CE
//
// Written for the book Programming Windows CE
// Copyright (C) 2003 Douglas Boling
//======================================================================
#include <windows.h>                 // For all that Windows stuff
#include "shapes.h"                  // Program-specific stuff

//----------------------------------------------------------------
// Global data
//
const TCHAR szAppName[] = TEXT ("Shapes");
HINSTANCE hInst;                     // Program instance handle

// Message dispatch table for MainWindowProc
const struct decodeUINT MainMessages[] = {
    WM_PAINT, DoPaintMain,
    WM_DESTROY, DoDestroyMain,
};

//======================================================================
//
// Program entry point
//
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    LPWSTR lpCmdLine, int nCmdShow) {
    MSG msg;
    HWND hwndMain;

    // Initialize this instance.
    hwndMain = InitInstance(hInstance, lpCmdLine, nCmdShow);
    if (hwndMain == 0)
        return 0x10;

    // Application message loop
    while (GetMessage (&msg, NULL, 0, 0)) {
        TranslateMessage (&msg);
        DispatchMessage (&msg);
    }
    // Instance cleanup
    return TermInstance (hInstance, msg.wParam);
}
//----------------------------------------------------------------------
// InitInstance - Instance initialization
//
HWND InitInstance (HINSTANCE hInstance, LPWSTR lpCmdLine, int nCmdShow){
    WNDCLASS wc;
    HWND hWnd;

    // Save program instance handle in global variable.
    hInst = hInstance;

#if defined(WIN32_PLATFORM_PSPC)
    // If Pocket PC, allow only one instance of the application.
    hWnd = FindWindow (szAppName, NULL);
    if (hWnd) {
        SetForegroundWindow ((HWND)(((DWORD)hWnd) | 0x01));    
        return 0;
    }
#endif    
    // Register application main window class.
    wc.style = 0;                             // Window style
    wc.lpfnWndProc = MainWndProc;             // Callback function
    wc.cbClsExtra = 0;                        // Extra class data
    wc.cbWndExtra = 0;                        // Extra window data
    wc.hInstance = hInstance;                 // Owner handle
    wc.hIcon = NULL,                          // Application icon
    wc.hCursor = LoadCursor (NULL, IDC_ARROW);// Default cursor
    wc.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH);
    wc.lpszMenuName =  NULL;                  // Menu name
    wc.lpszClassName = szAppName;             // Window class name

    if (RegisterClass (&wc) == 0) return 0;
    // Create main window.
    hWnd = CreateWindowEx (WS_EX_NODRAG,      // Ex Style
                         szAppName,           // Window class
                         TEXT("Shapes"),      // Window title
                         WS_VISIBLE,          // Style flags
                         CW_USEDEFAULT,       // x position
                         CW_USEDEFAULT,       // y position
                         CW_USEDEFAULT,       // Initial width
                         CW_USEDEFAULT,       // Initial height
                         NULL,                // Parent
                         NULL,                // Menu, must be null
                         hInstance,           // Application instance
                         NULL);               // Pointer to create
                                              // parameters
    // Return fail code if window not created.
    if (!IsWindow (hWnd)) return 0;

    // Standard show and update calls
    ShowWindow (hWnd, nCmdShow);
    UpdateWindow (hWnd);
    return hWnd;
}
//----------------------------------------------------------------------
// TermInstance - Program cleanup
//
int TermInstance (HINSTANCE hInstance, int nDefRC) {

    return nDefRC;
}
//======================================================================
// Message handling procedures for MainWindow
//

//----------------------------------------------------------------------
// MainWndProc - Callback function for application window
//
LRESULT CALLBACK MainWndProc (HWND hWnd, UINT wMsg, WPARAM wParam, 
                              LPARAM lParam) {
    INT i;
    //
    // Search message list to see if we need to handle this
    // message. If in list, call procedure.
    //
    for (i = 0; i < dim(MainMessages); i++) {
        if (wMsg == MainMessages[i].Code)
            return (*MainMessages[i].Fxn)(hWnd, wMsg, wParam, lParam);
    }
    return DefWindowProc (hWnd, wMsg, wParam, lParam);
}
//----------------------------------------------------------------
// MyCreateHatchBrush - Creates hatched brushes
//
HBRUSH MyCreateHatchBrush (INT fnStyle, COLORREF clrref) {
    BRUSHBMP brbmp;
    BYTE *pBytes;
    int i;
    DWORD dwBits[6][2] = {
        {0x000000ff,0x00000000}, {0x10101010,0x10101010},
        {0x01020408,0x10204080}, {0x80402010,0x08040201},
        {0x101010ff,0x10101010}, {0x81422418,0x18244281},
    };

    if ((fnStyle < 0) || (fnStyle > dim(dwBits)))
        return 0;
    memset (&brbmp, 0, sizeof (brbmp));

    brbmp.bmi.biSize = sizeof (BITMAPINFOHEADER);
    brbmp.bmi.biWidth = 8;
    brbmp.bmi.biHeight = 8;
    brbmp.bmi.biPlanes = 1;
    brbmp.bmi.biBitCount = 1;
    brbmp.bmi.biClrUsed = 2;
    brbmp.bmi.biClrImportant = 2;

    // Initialize the palette of the bitmap.
    brbmp.dwPal[0] = PALETTERGB(0xff,0xff,0xff);
    brbmp.dwPal[1] = PALETTERGB((BYTE)((clrref >> 16) & 0xff),
                                (BYTE)((clrref >> 8) & 0xff),
                                (BYTE)(clrref & 0xff));

    // Write the hatch data to the bitmap.  
    pBytes = (BYTE *)&dwBits[fnStyle];
    for (i = 0; i < 8; i++)
        brbmp.bBits[i*4] = *pBytes++;

    // Return the handle of the brush created.
    return CreateDIBPatternBrushPt (&brbmp, DIB_RGB_COLORS);
}
//----------------------------------------------------------------------
// DoPaintMain - Process WM_PAINT message for window.
//
LRESULT DoPaintMain (HWND hWnd, UINT wMsg, WPARAM wParam, 
                     LPARAM lParam) {
    PAINTSTRUCT ps;
    RECT rect;
    HDC hdc;
    POINT ptArray[6];
    HBRUSH hBr, hOldBr;
    TCHAR szText[128];

    GetClientRect (hWnd, &rect);
    hdc = BeginPaint (hWnd, &ps); 

    // Draw ellipse.
    hBr = (HBRUSH) GetStockObject (DKGRAY_BRUSH);
    hOldBr = (HBRUSH) SelectObject (hdc, hBr);
    Ellipse (hdc, 10, 50, 90, 130);
    SelectObject (hdc, hOldBr);

    // Draw round rectangle.
    hBr = (HBRUSH) GetStockObject (LTGRAY_BRUSH);
    hOldBr = (HBRUSH) SelectObject (hdc, hBr);
    RoundRect (hdc, 95, 50, 150, 130, 30, 30);
    SelectObject (hdc, hOldBr);

    // Draw hexagon using Polygon. 
    hBr = (HBRUSH) GetStockObject (WHITE_BRUSH);
    hOldBr = (HBRUSH) SelectObject (hdc, hBr);
    ptArray[0].x = 192;
    ptArray[0].y = 50;
    ptArray[1].x = 155;
    ptArray[1].y = 75;
    ptArray[2].x = 155;
    ptArray[2].y = 105;
    ptArray[3].x = 192;
    ptArray[3].y = 130;
    ptArray[4].x = 230;
    ptArray[4].y = 105;
    ptArray[5].x = 230;
    ptArray[5].y = 75;

    Polygon (hdc, ptArray, 6);
    SelectObject (hdc, hOldBr);

    hBr = (HBRUSH) MyCreateHatchBrush (HS_DIAGCROSS, RGB (0, 0, 0));
    hOldBr = (HBRUSH) SelectObject (hdc, hBr);
    Rectangle (hdc, 10, 145, 225, 210);
    SelectObject (hdc, hOldBr);
    DeleteObject (hBr);

    SetBkMode (hdc, OPAQUE);
    lstrcpy (szText, TEXT ("Opaque background"));
    ExtTextOut (hdc, 20, 160, 0, NULL, 
                szText, lstrlen (szText), NULL);

    SetBkMode (hdc, TRANSPARENT);
    lstrcpy (szText, TEXT ("Transparent background"));
    ExtTextOut (hdc, 20, 185, 0, NULL,
                szText, lstrlen (szText), NULL);

    EndPaint (hWnd, &ps); 
    return 0;
}
//----------------------------------------------------------------------
// DoDestroyMain - Process WM_DESTROY message for window
//
LRESULT DoDestroyMain (HWND hWnd, UINT wMsg, WPARAM wParam, 
                       LPARAM lParam) {
    PostQuitMessage (0);
    return 0;
}