//ChildWindow.c
#include<windows.h>
#include"resource.h"
//水平、垂直的子窗口个数(这里就表示总共有4个子窗口)
#define DIVISIONS 6
//重新定义一个窗口风格，不能改变窗口大小
#define WS_UNRESIZEWINDOW (WS_OVERLAPPED | \
WS_CAPTION | \
WS_SYSMENU | \
WS_MINIMIZEBOX)
TCHAR szChildName[] = TEXT("ChildWindow");
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); //父窗口回调函数
LRESULT CALLBACK ChildWndProc(HWND, UINT, WPARAM, LPARAM); //子窗口回调函数
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
PSTR szCmdLine,
int iCmdShow)
{
static TCHAR szAppName[] = TEXT("MainWindow");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
int cxScreen, cyScreen;
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;
//注册父窗口类
if(!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("This program requires Windows NT!"),
szAppName, MB_ICONERROR);
return 0;
}
wndclass.lpfnWndProc = ChildWndProc;
wndclass.hIcon = NULL;
wndclass.lpszClassName = szChildName;
//注册子窗口类
RegisterClass(&wndclass);
cxScreen = GetSystemMetrics(SM_CXSCREEN);
cyScreen = GetSystemMetrics(SM_CYSCREEN);
hwnd = CreateWindow(szAppName,
TEXT("MainWindow Demo"),
WS_UNRESIZEWINDOW,
cxScreen / 4,
cyScreen / 8,
cxScreen / 2,
cyScreen * 3 / 4,
NULL,
NULL,
hInstance,
NULL);
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)
{
//依次是父窗口客户区大小、位图大小、子窗口大小
static int cxClient, cyClient, cxBitmap, cyBitmap, cxChild, cyChild;
//子窗口的窗口句柄
static HWND hwndChild[DIVISIONS][DIVISIONS];
static HBITMAP hBitmap;
HINSTANCE hInstance;
HDC hdc, hdcMem;
PAINTSTRUCT ps;
int i, j;
switch(message)
{
case WM_CREATE:
/* 加载位图信息 */
{
BITMAP bitmap;
hInstance = ((LPCREATESTRUCT)lParam)->hInstance;
hBitmap = LoadBitmap(hInstance, MAKEINTRESOURCE(IDB_BITMAP1));
GetObject(hBitmap, sizeof(BITMAP), &bitmap);
cxBitmap = bitmap.bmWidth;
cyBitmap = bitmap.bmHeight;
}
/* 创建子窗口 */
for(i=0; i<DIVISIONS; i++)
for(j=0; j<DIVISIONS; j++)
hwndChild[i][j] = CreateWindow(szChildName, NULL,
WS_CHILD | WS_VISIBLE,
0, 0, 0, 0,
hwnd, NULL, hInstance, NULL);
return 0 ;
case WM_SIZE:
//确定父窗口客户区大小
cxClient = LOWORD(lParam);
cyClient = HIWORD(lParam);
//确定子窗口大小
cxChild = cxClient / DIVISIONS;
cyChild = cyClient / DIVISIONS;
/* 移动子窗口 */
for(i=0; i<DIVISIONS; i++)
for(j=0; j<DIVISIONS; j++)
MoveWindow(hwndChild[i][j], i * (cxChild + 1), j * (cyChild + 1),
cxChild, cyChild, TRUE);
return 0;
//在父窗口中绘制位图
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
hdcMem = CreateCompatibleDC(hdc);
SelectObject(hdcMem, hBitmap);
//使用映射模式来缩放位图，以适合客户区大小
SetMapMode(hdc, MM_ANISOTROPIC);
SetWindowExtEx(hdc, cxBitmap, cyBitmap, NULL);
SetViewportExtEx(hdc, cxClient, cyClient, NULL);
BitBlt(hdc, 0, 0, cxBitmap, cyBitmap, hdcMem, 0, 0, SRCCOPY);
DeleteDC(hdcMem);
EndPaint(hwnd, &ps);
return 0;
/*
因为在子窗口中通过鼠标消息隐藏，这时父窗口的该区域就可见，
因此我们可以让父窗口通过鼠标消息显示子窗口
*/
case WM_LBUTTONDOWN:
{
int xMouse, yMouse;
xMouse = LOWORD(lParam);
yMouse = HIWORD(lParam);
for(i=0; i<DIVISIONS; i++)
for(j=0; j<DIVISIONS; j++)
//如果鼠标点击位置在子窗口上，就显示
if((xMouse >= i * cxChild && xMouse < (i+1) * cxChild)
&& (yMouse >= j * cyChild && yMouse < (j+1) * cyChild))
{
ShowWindow(hwndChild[i][j], SW_SHOW);
return 0;
}
}
return 0;
case WM_DESTROY:
DeleteObject(hBitmap);
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
//子窗口回调函数
LRESULT CALLBACK ChildWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
//点击子窗口时隐藏
case WM_LBUTTONDOWN:
ShowWindow(hwnd, SW_HIDE);
return 0;
}
return DefWindowProc (hwnd, message, wParam, lParam);
}
