Adicionando linhas de tabelas e gráficos a um Menu

O exemplo de código a seguir mostra como criar um menu que contém o item de menu bitmaps. Ele cria dois menus. O primeiro é um menu gráfico que contém três item de menu bitmaps: um gráfico de pizza, um gráfico de linhas e um gráfico de barras. O exemplo demonstra como carregar esses bitmaps de arquivo de recurso do aplicativo e, em seguida, use o CreatePopupMenu e AppendMenu funções para criar o menu e itens de menu.

O segundo menu é um menu de linhas. Ele contém bitmaps mostrando os estilos de linha fornecidos pela caneta predefinida no sistema. Os estilo de linha bitmaps são criados em tempo de execução usando funções GDI.

Aqui estão as definições dos recursos de bitmap no arquivo de definição de recurso do aplicativo.

 BITMAP de pizza pie.bmp linha BITMAP line.bmp BAR BITMAP bar.bmp 

 

Aqui estão as partes relevantes do arquivo de cabeçalho do aplicativo.

/ / Identificadores de item de menu # define IDM_SOLID PS_SOLID # define IDM_DASH PS_DASH # define IDM_DASHDOT PS_DASHDOT # define IDM_DASHDOTDOT PS_DASHDOTDOT # define IDM_PIE 1 # define IDM_LINE 2 # define IDM_BAR 3 / / linha-tipo sinalizadores # definir sólidos 0 # define ponto 1 # define DASH 2 # define DASHDOT 3 # define DASHDOTDOT 4 / / contar canetas # define CPENS 5 / /Flags # tipo de gráfico definir pizza 1 # define linha 2 # define BAR 3 / / funcionam protótipos LRESULT APIENTRY MainWndProc (HWNDUINT, WPARAM, LPARAM); 
PRIVATEVOID MakeChartMenu(HWND); 
VOID MakeLineMenu (HWND, HPEN, HBITMAP) 

 

O exemplo a seguir mostra como menus e item de menu bitmaps são criados em um aplicativo.

LRESULT APIENTRY MainWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) 
{ 
 
    static HPEN hpen[CPENS]; 
    static HBITMAP hbmp[CPENS]; 
    int i; 
 
    switch (uMsg) 
    { 
        case WM_CREATE: 
 
            // Create the Chart and Line menus.  
 
            MakeChartMenu(hwnd); 
            MakeLineMenu(hwnd, hpen, hbmp); 
            return 0; 
 
        // Process other window messages. 
 
        case WM_DESTROY: 
 
            for (i = 0; i < CPENS; i++) 
            { 
                DeleteObject(hbmp[i]); 
                DeleteObject(hpen[i]); 
            } 
 
            PostQuitMessage(0); 
            break; 
 
        default: 
            return DefWindowProc(hwnd, uMsg, wParam, lParam); 
    } 
    return NULL; 
} 
 
VOID MakeChartMenu(HWND hwnd) 
{ 
    HBITMAP hbmpPie;    // handle to pie chart bitmap   
    HBITMAP hbmpLine;   // handle to line chart bitmap  
    HBITMAP hbmpBar;    // handle to bar chart bitmap   
    HMENU hmenuMain;    // handle to main menu          
    HMENU hmenuChart;   // handle to Chart menu  
 
    // Load the pie, line, and bar chart bitmaps from the 
    // resource-definition file. 
 
    hbmpPie = LoadBitmap(hinst, MAKEINTRESOURCE(PIE)); 
    hbmpLine = LoadBitmap(hinst, MAKEINTRESOURCE(LINE)); 
    hbmpBar = LoadBitmap(hinst, MAKEINTRESOURCE(BAR)); 
 
    // Create the Chart menu and add it to the menu bar. 
    // Append the Pie, Line, and Bar menu items to the Chart 
    // menu. 
 
    hmenuMain = GetMenu(hwnd); 
    hmenuChart = CreatePopupMenu(); 
    AppendMenu(hmenuMain, MF_STRING | MF_POPUP, (UINT) hmenuChart, 
        "Chart"); 
    AppendMenu(hmenuChart, MF_BITMAP, IDM_PIE, (LPCTSTR) hbmpPie); 
    AppendMenu(hmenuChart, MF_BITMAP, IDM_LINE, 
        (LPCTSTR) hbmpLine); 
    AppendMenu(hmenuChart, MF_BITMAP, IDM_BAR, (LPCTSTR) hbmpBar); 
 
    return; 
} 
 
VOID MakeLineMenu(HWND hwnd, HPEN phpen, HBITMAP phbmp) 
{ 
    HMENU hmenuLines;       // handle to Lines menu      
    HMENU hmenu;            // handle to main menu              
    COLORREF crMenuClr;     // menu-item background color       
    HBRUSH hbrBackground;   // handle to background brush       
    HBRUSH hbrOld;          // handle to previous brush         
    WORD wLineX;            // width of line bitmaps            
    WORD wLineY;            // height of line bitmaps           
    HDC hdcMain;            // handle to main window's DC       
    HDC hdcLines;           // handle to compatible DC          
    HBITMAP hbmpOld;        // handle to previous bitmap        
    int i;                  // loop counter                     
 
    // Create the Lines menu. Add it to the menu bar.  
 
    hmenu = GetMenu(hwnd); 
    hmenuLines = CreatePopupMenu(); 
    AppendMenu(hmenu, MF_STRING | MF_POPUP, 
        (UINT) hmenuLines, "&Lines"); 
 
    // Create a brush for the menu-item background color.  
 
    crMenuClr = GetSysColor(COLOR_MENU); 
    hbrBackground = CreateSolidBrush(crMenuClr); 
 
    // Create a compatible device context for the line bitmaps, 
    // and then select the background brush into it. 
 
    hdcMain = GetDC(hwnd); 
    hdcLines = CreateCompatibleDC(hdcMain); 
    hbrOld = SelectObject(hdcLines, hbrBackground); 
 
    // Get the dimensions of the check-mark bitmap. The width of 
    // the line bitmaps will be five times the width of the 
    // check-mark bitmap. 
 
    wLineX = GetSystemMetrics(SM_CXMENUCHECK) * (WORD) 5; 
    wLineY = GetSystemMetrics(SM_CYMENUCHECK); 
 
    // Create the bitmaps and select them, one at a time, into the 
    // compatible device context. Initialize each bitmap by 
    // filling it with the menu-item background color. 
 
    for (i = 0; i < CPENS; i++) 
    { 
        phbmp[i] = CreateCompatibleBitmap(hdcMain, wLineX, wLineY); 
        if (i == 0) 
            hbmpOld = SelectObject(hdcLines, phbmp[i]); 
        else 
            SelectObject(hdcLines, phbmp[i]); 
        ExtFloodFill(hdcLines, 0, 0, crMenuClr, FLOODFILLBORDER); 
    } 
 
    // Create the pens.  
 
    phpen[0] = CreatePen(PS_SOLID, 1, RGB(0, 0, 0)); 
    phpen[1] = CreatePen(PS_DOT, 1, RGB(0, 0, 0)); 
    phpen[2] = CreatePen(PS_DASH, 1, RGB(0, 0, 0)); 
    phpen[3] = CreatePen(PS_DASHDOT, 1, RGB(0, 0, 0)); 
    phpen[4] = CreatePen(PS_DASHDOTDOT, 1, RGB(0, 0, 0)); 
 
    // Select a pen and a bitmap into the compatible device 
    // context, draw a line into the bitmap, and then append 
    // the bitmap as an item in the Lines menu. 
 
    for (i = 0; i < CPENS; i++) 
    { 
        SelectObject(hdcLines, phbmp[i]); 
        SelectObject(hdcLines, phpen[i]); 
        MoveToEx(hdcLines, 0, wLineY / 2, NULL); 
        LineTo(hdcLines, wLineX, wLineY / 2); 
        AppendMenu(hmenuLines, MF_BITMAP, i + 1, 
            (LPCTSTR) phbmp[i]); 
    } 
 
    // Release the main window's device context and destroy the 
    // compatible device context. Also, destroy the background 
    // brush. 
 
    ReleaseDC(hwnd, hdcMain); 
    SelectObject(hdcLines, hbrOld); 
    DeleteObject(hbrBackground); 
    SelectObject(hdcLines, hbmpOld); 
    DeleteDC(hdcLines); 
 
    return; 
} 
 

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