第9章 子窗口控件_9.1-9.3按钮类、控件颜色、静态类

/*------------------------------------------------------------
BTNLOOK.C -- Button Look Program
(c) Charles Petzold, 1998
------------------------------------------------------------*/
#include <windows.h>
struct
{
    int iStyle;    //按钮样式
    TCHAR* szText; //显示文本
}
button[] =
{
    BS_DEFPUSHBUTTON, TEXT("PushButton"),
    BS_DEFPUSHBUTTON, TEXT("DefPushButton"),
    BS_CHECKBOX, TEXT("CheckBox"),
    BS_AUTOCHECKBOX, TEXT("AutoCheckBox"),
    BS_RADIOBUTTON, TEXT("RadioButton"),
    BS_3STATE, TEXT("3State"),
    BS_AUTO3STATE, TEXT("Auto3State"),
    BS_GROUPBOX, TEXT("GroupBox"),
    BS_AUTORADIOBUTTON, TEXT("AutoRadioButton"),
    BS_OWNERDRAW, TEXT("OwnerDraw")
};
#define NUM   (sizeof(button)/sizeof(button[0]))
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    PSTR szCmdLine, int iCmdShow)
{
    static TCHAR szAppName[] = TEXT("BtnLook");
    HWND         hwnd;
    MSG          msg;
    WNDCLASS     wndclass;
    wndclass.style = CS_HREDRAW | CS_VREDRAW;
    wndclass.lpfnWndProc = WndProc;
    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;
    wndclass.hInstance = hInstance;
    wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName = NULL;
    wndclass.lpszClassName = szAppName;
    if (!RegisterClass(&wndclass))
    {
        MessageBox(NULL, TEXT("This program requires Windows NT!"),
            szAppName, MB_ICONERROR);
        return 0;
    }

    hwnd = CreateWindow(szAppName,                  // window class name
        TEXT("Button Look"), // window caption
        WS_OVERLAPPEDWINDOW,        // window style
        CW_USEDEFAULT,              // initial x position
        CW_USEDEFAULT,              // initial y position
        CW_USEDEFAULT,              // initial x size
        CW_USEDEFAULT,              // initial y size
        NULL,                       // parent window handle
        NULL,                       // window menu handle
        hInstance,                  // program instance handle
        NULL);                     // creation parameters

    ShowWindow(hwnd, iCmdShow);
    UpdateWindow(hwnd);

    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HDC         hdc;
    PAINTSTRUCT ps;
    static HWND hwndButton[NUM];
    static int cxChar, cyChar;
    static TCHAR szTop[] = TEXT("message            wParam       lParam"),
        szUnd[] = TEXT("_______            ______       ______"),
        szFormat[] = TEXT("%-16s%04X-%04X    %04X-%04X"),
        szBuffer[50];
    static RECT rect;
    switch (message)
    {
    case WM_CREATE:
        cxChar = LOWORD(GetDialogBaseUnits());//对话框基本单位，
        cyChar = HIWORD(GetDialogBaseUnits());//为系统字体字符的平均宽度和高度
        //创建NUM个按钮
        for (int i = 0; i < NUM; i++)
        {
            hwndButton[i] = CreateWindow(
                TEXT("button"),
                button[i].szText,
                WS_VISIBLE | WS_CHILD | button[i].iStyle,
                cxChar, cyChar*(1 + 2 * i), //每个按钮高度为7/4*cyChar，加1/4间隔，得2*cyChar
                20 * cxChar, 7 * cyChar / 4,
                hwnd, (HMENU)i,
                ((LPCREATESTRUCT)lParam)->hInstance,
                NULL);
        }

        return 0;
    case WM_SIZE:
        rect.left = 24 * cxChar;
        rect.top = 2 * cyChar;
        rect.right = LOWORD(lParam);
        rect.bottom = HIWORD(lParam);
        return 0;
    case WM_DRAWITEM:
    case WM_COMMAND:
        ScrollWindow(hwnd, 0, -cyChar, &rect, &rect); //产生一个无效区
        hdc = GetDC(hwnd);
        SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
        TextOut(hdc, 24 * cxChar, cyChar*(rect.bottom / cyChar - 1),
            szBuffer,
            wsprintf(szBuffer, szFormat,
            message == WM_DRAWITEM ? TEXT("WM_DRAWITEM") :
            TEXT("WM_COMMAND"),
            HIWORD(wParam), LOWORD(wParam),
            HIWORD(lParam), LOWORD(lParam)));
        ReleaseDC(hwnd, hdc);
        ValidateRect(hwnd, &rect); //因为ScrollWindow会将生无效区，
        //而ValidateRect会将无效区有效化，阻止发送WM_PAINT消息。
        //如果注释掉ValidateRect，将引起不断的重绘。
        return 0;
    case WM_PAINT:
        /*
        1、窗口句柄（HWND）都是由操作系统内核管理的，系统内部有一个z-order序列，记录着当前从屏幕底部
        （假象的从屏幕到眼睛的方向），到屏幕最高层的一个窗口句柄的排序，这个排序不关注父窗口还
        是子窗口。当任意一个窗口接受到WM_PAINT消息产生重绘，更新区绘制完成以后，就搜索它的前面
        的一个窗口，如果此窗口的范围和更新区有交集，就向这个发送wm_paint消息，周而复始，直到执
        行到顶层窗口才算完成。
        2、主窗口接受WM_PAINT绘制完成后，会引起更新区上所有子窗口的重绘（所有子窗口也是从底到外排序的）
        3、子窗口无效不会引起父窗口重绘。父窗口无效，如果父窗口(没有WS_CLIPCHILDREN属性)收到WM_PAINT，
        则所有子窗口都会在父窗口处理WM_PAINT之后收到WM_PAINT重绘消息。当然，如果父窗口带有属性
        WS_CLIPCHILDREN，则不会引起子窗口重绘。
        */
        //以下将客户区刷白，因子窗口范围与无效区有交集，会导致子窗口重绘，因此本例中WM_DRAWITEM会被触发，
        //而WM_DRAWITEM过程中的SrollWindow会引起WM_PAINT，可在WM_DRAWITEM里，将无效区有效化，阻止
        //ScrollWindow引发的WM_PAINT，从而防止死循环。
        InvalidateRect(hwnd, NULL, TRUE);//因为在WM_COMMAND过程中绘制的内容，在WM_PAINT中无法重绘出来，
        //为防止主窗口被遮挡，再移开时，出现WM_COMMMAND中会制的无法重现，
        //最省事的做法是，那些内容全部不要了。
        hdc = BeginPaint(hwnd, &ps);     //将无效区有效化，阻止重复发送WM_PAINT消息。
        SelectObject(hdc, GetStockObject(SYSTEM_FIXED_FONT));
        SetBkMode(hdc, TRANSPARENT);
        TextOut(hdc, 24 * cxChar, cyChar, szTop, lstrlen(szTop));
        TextOut(hdc, 24 * cxChar, cyChar, szUnd, lstrlen(szUnd));
        EndPaint(hwnd, &ps);
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd, message, wParam, lParam);
}

/*------------------------------------------------------------
OWNDRAW.C -- Owner-Draw Button Demo Program
(c) Charles Petzold, 1998
------------------------------------------------------------*/
#include <windows.h>
#define ID_SMALLER 1
#define ID_LARGER  2
#define BTN_WIDTH  (8 * cxChar)
#define BTN_HEIGHT (4 * cyChar)
HINSTANCE hInst;
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    PSTR szCmdLine, int iCmdShow)
{
    static TCHAR szAppName[] = TEXT("OwnDraw");
    HWND         hwnd;
    MSG          msg;
    WNDCLASS     wndclass;
    hInst = hInstance;
    wndclass.style = CS_HREDRAW | CS_VREDRAW;
    wndclass.lpfnWndProc = WndProc;
    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;
    wndclass.hInstance = hInstance;
    wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName = NULL;
    wndclass.lpszClassName = szAppName;
    if (!RegisterClass(&wndclass))
    {
        MessageBox(NULL, TEXT("This program requires Windows NT!"),
            szAppName, MB_ICONERROR);
        return 0;
    }

    hwnd = CreateWindow(szAppName,                  // window class name
        TEXT("Owner-Draw Button Demo"), // window caption
        WS_OVERLAPPEDWINDOW,        // window style
        CW_USEDEFAULT,              // initial x position
        CW_USEDEFAULT,              // initial y position
        CW_USEDEFAULT,              // initial x size
        CW_USEDEFAULT,              // initial y size
        NULL,                       // parent window handle
        NULL,                       // window menu handle
        hInstance,                  // program instance handle
        NULL);                     // creation parameters

    ShowWindow(hwnd, iCmdShow);
    UpdateWindow(hwnd);

    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return msg.wParam;
}
void Triangle(HDC hdc, POINT pt[])
{
    SelectObject(hdc, GetStockObject(BLACK_BRUSH));
    Polygon(hdc, pt, 3);
    SelectObject(hdc, GetStockObject(WHITE_BRUSH));
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    static HWND hwndSmaller, hwndLarger;
    static cxClient, cyClient, cxChar, cyChar;
    DRAWITEMSTRUCT*  pdis;
    int cx, cy;
    POINT pt[3];
    RECT rc;

    switch (message)
    {
    case WM_CREATE:
        cxChar = LOWORD(GetDialogBaseUnits());
        cyChar = HIWORD(GetDialogBaseUnits());

        //创建自绘PushButtons
        hwndSmaller = CreateWindow(TEXT("button"), TEXT(""),
            WS_CHILD | WS_VISIBLE | BS_OWNERDRAW, 0, 0, BTN_WIDTH, BTN_HEIGHT,
            hwnd, (HMENU)ID_SMALLER, hInst, NULL);

        hwndLarger = CreateWindow(TEXT("button"), TEXT(""),
            WS_CHILD | WS_VISIBLE | BS_OWNERDRAW, 0, 0, BTN_WIDTH, BTN_HEIGHT,
            hwnd, (HMENU)ID_LARGER, hInst, NULL);
        return 0;
    case WM_SIZE:
        cxClient = LOWORD(lParam);
        cyClient = HIWORD(lParam);
        //移动按钮到新的中心
        MoveWindow(hwndSmaller,
            cxClient / 2 - 3 * BTN_WIDTH / 2,
            cyClient / 2 - BTN_HEIGHT / 2,
            BTN_WIDTH, BTN_HEIGHT, TRUE);
        MoveWindow(hwndLarger,
            cxClient / 2 + BTN_WIDTH / 2,
            cyClient / 2 - BTN_HEIGHT / 2,
            BTN_WIDTH, BTN_HEIGHT, TRUE);
        return 0;
    case WM_COMMAND:
        GetWindowRect(hwnd, &rc);
        switch (LOWORD(wParam))
        {
            //每次10%放大或缩小窗口
        case ID_SMALLER:
            rc.left += cxClient / 20; //左边缩小5%
            rc.right -= cxClient / 20; //左边缩小5%
            rc.top += cyClient / 20; //上边缩小5%
            rc.bottom -= cyClient / 20; //下边缩小5%
            break;
        case ID_LARGER:
            rc.left -= cxClient / 20; //左边扩大5%
            rc.right += cxClient / 20; //左边扩大5%
            rc.top -= cyClient / 20; //上边扩大5%
            rc.bottom += cyClient / 20; //下边扩大5%
            break;
        }
        MoveWindow(hwnd, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, TRUE);
        return 0;
    case WM_DRAWITEM:
        pdis = (LPDRAWITEMSTRUCT)lParam;
        //画白色矩形和黑色边框
        FillRect(pdis->hDC, &pdis->rcItem, GetStockObject(WHITE_BRUSH));
        FrameRect(pdis->hDC, &pdis->rcItem, GetStockObject(BLACK_BRUSH));

        //画向内和向外的黑三角形
        cx = pdis->rcItem.right - pdis->rcItem.left;
        cy = pdis->rcItem.bottom - pdis->rcItem.top;
        switch (pdis->CtlID)
        {
        case ID_SMALLER:
            //上边的三角形
            pt[0].x = 3 * cx / 8; pt[0].y = 1 * cy / 8;
            pt[1].x = 5 * cx / 8; pt[1].y = 1 * cy / 8;
            pt[2].x = 4 * cx / 8; pt[2].y = 3 * cy / 8;
            Triangle(pdis->hDC, pt);
            //下边的三角形
            pt[0].x = 4 * cx / 8; pt[0].y = 5 * cy / 8;
            pt[1].x = 5 * cx / 8; pt[1].y = 7 * cy / 8;
            pt[2].x = 3 * cx / 8; pt[2].y = 7 * cy / 8;
            Triangle(pdis->hDC, pt);
            //左边的三角形
            pt[0].x = 1 * cx / 8; pt[0].y = 3 * cy / 8;
            pt[1].x = 3 * cx / 8; pt[1].y = 4 * cy / 8;
            pt[2].x = 1 * cx / 8; pt[2].y = 5 * cy / 8;
            Triangle(pdis->hDC, pt);
            //右边的三角形
            pt[0].x = 5 * cx / 8; pt[0].y = 4 * cy / 8;
            pt[1].x = 7 * cx / 8; pt[1].y = 3 * cy / 8;
            pt[2].x = 7 * cx / 8; pt[2].y = 5 * cy / 8;
            Triangle(pdis->hDC, pt);
            break;
        case ID_LARGER:
            //上边的三角形
            pt[0].x = 4 * cx / 8; pt[0].y = 1 * cy / 8;
            pt[1].x = 5 * cx / 8; pt[1].y = 3 * cy / 8;
            pt[2].x = 3 * cx / 8; pt[2].y = 3 * cy / 8;
            Triangle(pdis->hDC, pt);
            //下边的三角形
            pt[0].x = 3 * cx / 8; pt[0].y = 5 * cy / 8;
            pt[1].x = 5 * cx / 8; pt[1].y = 5 * cy / 8;
            pt[2].x = 4 * cx / 8; pt[2].y = 7 * cy / 8;
            Triangle(pdis->hDC, pt);
            //左边的三角形
            pt[0].x = 1 * cx / 8; pt[0].y = 4 * cy / 8;
            pt[1].x = 3 * cx / 8; pt[1].y = 3 * cy / 8;
            pt[2].x = 3 * cx / 8; pt[2].y = 5 * cy / 8;
            Triangle(pdis->hDC, pt);
            //右边的三角形
            pt[0].x = 5 * cx / 8; pt[0].y = 3 * cy / 8;
            pt[1].x = 7 * cx / 8; pt[1].y = 4 * cy / 8;
            pt[2].x = 5 * cx / 8; pt[2].y = 5 * cy / 8;
            Triangle(pdis->hDC, pt);
            break;
        }
        //选中时，反转矩形
        if (pdis->itemState & ODS_SELECTED)
            InvertRect(pdis->hDC, &pdis->rcItem);
        //按钮获得焦点时画虚线框
        if (pdis->itemState & ODS_FOCUS)
        {
            pdis->rcItem.left += cx / 16;
            pdis->rcItem.top += cy / 16;
            pdis->rcItem.right -= cx / 16;
            pdis->rcItem.bottom -= cy / 16;
            DrawFocusRect(pdis->hDC, &pdis->rcItem);
        }
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd, message, wParam, lParam);
}