C++ MDI子窗口创建失败
我有一个MDI应用程序,两个不同的子窗口类。我的问题是,如果第一个实例已经出现在屏幕上,我就不能创建第二个实例,但我可以用另一种方法来创建;如果在WndProc中的case ID_OPEN_NEW上,我将类名更改为g_szChildClassName2,然后在MDIChildWndProc2中取消注释case WM_LBUTTONDOWN的内容以创建g_szChildClassName的子窗口,那么这两个窗口将不会出现问题 没有错误消息,只是表示操作已成功完成。我想这与工具栏或GDI+的绘图有关C++ MDI子窗口创建失败,c++,gdi+,win32gui,C++,Gdi+,Win32gui,我有一个MDI应用程序,两个不同的子窗口类。我的问题是,如果第一个实例已经出现在屏幕上,我就不能创建第二个实例,但我可以用另一种方法来创建;如果在WndProc中的case ID_OPEN_NEW上,我将类名更改为g_szChildClassName2,然后在MDIChildWndProc2中取消注释case WM_LBUTTONDOWN的内容以创建g_szChildClassName的子窗口,那么这两个窗口将不会出现问题 没有错误消息,只是表示操作已成功完成。我想这与工具栏或GDI+的绘图有关
INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, PSTR, INT iCmdShow)
{
HWND hWnd;
MSG msg;
WNDCLASSEXW wc;
GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
g_instance = hInstance;
// Initialize GDI+.
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = MAKEINTRESOURCE(IDR_MENU1);
wc.lpszClassName = g_szClassName;
wc.hIconSm = NULL;
if(!RegisterClassEx(&wc))
{
MessageBox(NULL, L"Window Registration Failed!", L"Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
if(!SetUpMDIChildWindowClass(hInstance))
return 0;
if(!SetUpMDIChildWindowClass2(hInstance))
return 0;
hWnd = CreateWindowEx(
0,
g_szClassName,
L"Interactive music",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 480, 320,
NULL, NULL, hInstance, NULL);
if(hWnd == NULL)
{
MessageBox(NULL, L"Window Creation Failed!", L"Error!",
MB_ICONEXCLAMATION | MB_OK);
return 0;
}
ShowWindow(hWnd, iCmdShow);
UpdateWindow(hWnd);
while(GetMessage(&msg, NULL, 0, 0) > 0)
{
if (!TranslateMDISysAccel(g_hMDIClient, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return msg.wParam;
GdiplusShutdown(gdiplusToken);
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message,
WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_CREATE:
{
CLIENTCREATESTRUCT ccs;
ccs.idFirstChild = ID_MDI_FIRSTCHILD;
g_hMDIClient = CreateWindowEx(WS_EX_CLIENTEDGE, L"mdiclient", NULL,
WS_CHILD | WS_CLIPCHILDREN | WS_VSCROLL | WS_HSCROLL | WS_VISIBLE,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
hWnd, (HMENU)IDC_MAIN_MDI, GetModuleHandle(NULL), (LPVOID)&ccs);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
case WM_COMMAND:
switch(LOWORD(wParam))
{
case ID_OPEN_NEW:
{
CreateNewMDIChild(g_hMDIClient, g_szChildClassName);
}
break;
default:
{
if(LOWORD(wParam) >= ID_MDI_FIRSTCHILD)
{
DefFrameProc(hWnd, g_hMDIClient, WM_COMMAND, wParam, lParam);
}
else
{
HWND hChild = (HWND)SendMessage(g_hMDIClient, WM_MDIGETACTIVE,0,0);
if(hChild)
{
SendMessage(hChild, WM_COMMAND, wParam, lParam);
}
}
}
}
break;
default:
return DefFrameProc(hWnd, g_hMDIClient, message, wParam, lParam);
}
return 0;
}
LRESULT CALLBACK MDIChildWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CREATE:
{
g_hToolbar = CreateWindowEx(0, TOOLBARCLASSNAME, NULL, WS_CHILD | WS_VISIBLE, 0, 0, 0, 0,
hwnd, (HMENU)IDC_MAIN_TOOL, GetModuleHandle(NULL), NULL);
if(g_hToolbar == NULL)
MessageBox(hwnd, L"Could not create tool bar.", L"Error", MB_OK | MB_ICONERROR);
SendMessage(g_hToolbar, TB_SETMAXTEXTROWS, 0, 0);
SendMessage(g_hToolbar, TB_BUTTONSTRUCTSIZE, (WPARAM)sizeof(TBBUTTON), 0);
HIMAGELIST hImageList = ImageList_Create(22,22, ILC_COLORDDB, 4, 0);
int what0 = ImageList_Add(hImageList, LoadBitmap(g_instance, MAKEINTRESOURCEW(IDB_BITMAP2)), NULL);
int what1 = ImageList_Add(hImageList, LoadBitmap(g_instance, MAKEINTRESOURCEW(IDB_BITMAP3)), NULL);
int what2 = ImageList_Add(hImageList, LoadBitmap(g_instance, MAKEINTRESOURCEW(IDB_BITMAP1)), NULL);
int what3 = ImageList_Add(hImageList, LoadBitmap(g_instance, MAKEINTRESOURCEW(IDB_BITMAP4)), NULL);
SendMessage(g_hToolbar, TB_SETIMAGELIST, (WPARAM)0, (LPARAM)hImageList);
TBBUTTON tbb[4] = {
{what0, ID_NEW_STEP, TBSTATE_ENABLED, BTNS_AUTOSIZE, {0}, 0, (INT_PTR)L"CreateStep"},
{what1, ID_DELETE_STEP, TBSTATE_ENABLED, BTNS_AUTOSIZE, {0}, 0, (INT_PTR)L"DeleteStep"},
{what2, ID_NEW_SEGMENT, TBSTATE_ENABLED, BTNS_AUTOSIZE, {0}, 0, (INT_PTR)L"CreateSegment"},
{what3, ID_DELETE_SEGMENT, TBSTATE_ENABLED, BTNS_AUTOSIZE, {0}, 0, (INT_PTR)L"DeleteSegment"},
};
SendMessage(g_hToolbar, TB_ADDBUTTONS, 4, (LPARAM)&tbb);
SendMessage(g_hToolbar, TB_SETBUTTONSIZE, 0, MAKELPARAM(22, 22));
SendMessage(g_hToolbar, TB_AUTOSIZE, 0, 0);
ShowWindow(g_hToolbar, SW_SHOW);
g_MDIChildHwnd = hwnd;
m_nHScrollPos = 0;
SetUpMDIChildClientScrollbar();
}
break;
case WM_PAINT:
{
HDC hdc;
PAINTSTRUCT ps;
hdc = BeginPaint(hwnd, &ps);
OnPaint(hdc);
EndPaint(hwnd, &ps);
}
break;
case WM_LBUTTONDBLCLK:
{
std::vector<CStep*>::iterator it = g_steps.begin();
while(it!=g_steps.end())
{
CStep& step = **it;
std::vector<CSegment*>::iterator its = step.m_segments.begin();
while(its != step.m_segments.end())
{
CSegment& seg = **its;
if(seg.m_bActive)
{
//create new window
CreateNewMDIChild(hwnd, g_szChildClassName2);
break;
}
its++;
}
it++;
}
}
break;
}
break;
case WM_SIZE:
SetUpMDIChildClientScrollbar();
default:
return DefMDIChildProc(hwnd, msg, wParam, lParam);
}
return 0;
}
LRESULT CALLBACK MDIChildWndProc2(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_LBUTTONDOWN:
{
//CreateNewMDIChild(g_hMDIClient, g_szChildClassName);
}
default:
return DefMDIChildProc(hwnd, msg, wParam, lParam);
}
return 0;
}
bool SetUpMDIChildWindowClass(HINSTANCE hInstance)
{
WNDCLASSEX wc;
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
wc.lpfnWndProc = MDIChildWndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);//(HBRUSH)(COLOR_3DFACE+1);
wc.lpszMenuName = NULL;
wc.lpszClassName = g_szChildClassName;
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
if(!RegisterClassEx(&wc))
{
MessageBox(0, L"Could Not Register Child Window", L"Oh Oh...",
MB_ICONEXCLAMATION | MB_OK);
return false;
}
else
return true;
}
bool SetUpMDIChildWindowClass2(HINSTANCE hInstance)
{
WNDCLASSEX wc;
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = MDIChildWndProc2;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = NULL;//LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);//(HBRUSH)(COLOR_3DFACE+1);
wc.lpszMenuName = NULL;
wc.lpszClassName = g_szChildClassName2;
wc.hIconSm = NULL;//LoadIcon(NULL, IDI_APPLICATION);
if(!RegisterClassEx(&wc))
{
MessageBox(0, L"Could Not Register Child Window", L"Oh Oh...",
MB_ICONEXCLAMATION | MB_OK);
return false;
}
else
return true;
}
HWND CreateNewMDIChild(HWND hMDIClient, const wchar_t* childClassName)
{
MDICREATESTRUCT mcs;
HWND hChild;
mcs.szTitle = L"untitled";
mcs.szClass = childClassName;
mcs.hOwner = GetModuleHandle(NULL);
mcs.x = mcs.cx = CW_USEDEFAULT;
mcs.y = mcs.cy = CW_USEDEFAULT;
mcs.style = WS_HSCROLL;
hChild = (HWND)SendMessage(hMDIClient, WM_MDICREATE, 0, (LONG)&mcs);
DWORD dw = GetLastError();
if(!hChild)
{
wchar_t buffer[256];
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,0,dw,MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT),buffer,256,0);
MessageBox(hMDIClient,buffer,L"Error",MB_OK|MB_ICONERROR);
}
return hChild;
}
INT-WINAPI-WinMain(HINSTANCE-HINSTANCE、HINSTANCE、PSTR、INT-iCmdShow)
{
HWND-HWND;
味精;
WNDCLASSEXW wc;
GdiplusStartupInput GdiplusStartupInput;
ULONG_PTR gdiplusToken;
g_instance=hInstance;
//初始化GDI+。
GdiplusStartup(&gdiplusToken,&gdiplusStartupInput,NULL);
wc.cbSize=sizeof(WNDCLASSEX);
wc.style=0;
wc.lpfnWndProc=WndProc;
wc.cbClsExtra=0;
wc.cbWndExtra=0;
wc.hInstance=hInstance;
wc.hIcon=LoadIcon(空,IDI_应用程序);
wc.hCursor=LoadCursor(空,IDC_箭头);
wc.hbrBackground=(HBRUSH)(彩色窗口+1);
wc.lpszMenuName=MAKEINTRESOURCE(IDR_MENU1);
wc.lpszClassName=g_szClassName;
wc.hIconSm=NULL;
如果(!RegisterClassEx(&wc))
{
MessageBox(NULL,L“窗口注册失败!”,L“错误!”,
MB|U图标连接| MB|U OK);
返回0;
}
如果(!SetUpMDIChildWindowClass(hInstance))
返回0;
如果(!SetUpMDIChildWindowClass2(hInstance))
返回0;
hWnd=CreateWindowEx(
0,
g_szClassName,
L“互动音乐”,
WS_重叠窗口,
CW_USEDEFAULT,CW_USEDEFAULT,480320,
NULL,NULL,hInstance,NULL);
if(hWnd==NULL)
{
MessageBox(NULL,L“窗口创建失败!”,L“错误!”,
MB|U图标连接| MB|U OK);
返回0;
}
显示窗口(hWnd、iCmdShow);
更新窗口(hWnd);
while(GetMessage(&msg,NULL,0,0)>0)
{
if(!TranslateMDISysAccel(g_hMDIClient,&msg))
{
翻译信息(&msg);
发送消息(&msg);
}
}
返回msg.wParam;
GdiplusShutdown(gdiplusToken);
返回msg.wParam;
}
LRESULT回调WndProc(HWND HWND,UINT消息,
WPARAM WPARAM,LPARAM LPARAM)
{
开关(信息)
{
案例WM_创建:
{
CLIENTCREATESTRUCT;
ccs.idFirstChild=ID\u MDI\u FIRSTCHILD;
g_hMDIClient=CreateWindowEx(WS_EX_CLIENTEDGE,L“mdiclient”,NULL,
WS|u CHILD | WS|u CLIPCHILDREN | WS|u VSCROLL | WS|u HSCROLL | WS|u可见,
CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
hWnd,(HMENU)IDC\u MAIN\u MDI、GetModuleHandle(空)、(LPVOID)和ccs);
}
打破
案例WM_销毁:
PostQuitMessage(0);
返回0;
case WM_命令:
开关(LOWORD(wParam))
{
案例ID\u打开\u新建:
{
CreateNewMDIChild(g_hMDIClient,g_szChildClassName);
}
打破
违约:
{
if(LOWORD(wParam)>=ID\u MDI\u FIRSTCHILD)
{
deframeproc(hWnd、g_-hMDIClient、WM_命令、wParam、lParam);
}
其他的
{
HWND hChild=(HWND)SendMessage(g_hMDIClient,WM_MDIGETACTIVE,0,0);
如果(hChild)
{
SendMessage(hChild、WM_命令、wParam、lParam);
}
}
}
}
打破
违约:
返回deframeproc(hWnd、g_hMDIClient、message、wParam、lParam);
}
返回0;
}
LRESULT回调MDIChildWndProc(HWND HWND、UINT msg、WPARAM WPARAM、LPARAM LPARAM)
{
开关(msg)
{
案例WM_创建:
{
g_hToolbar=CreateWindowEx(0,TOOLBARCLASSNAME,NULL,WS_子项| WS_可见,0,0,0,
hwnd,(HMENU)IDC_主工具,GetModuleHandle(NULL),NULL);
if(g_hToolbar==NULL)
MessageBox(hwnd,L“无法创建工具栏”,L“错误”,MB_OK | MB_ICONERROR);
SendMessage(g_hToolbar,TB_SETMAXTEXTROWS,0,0);
SendMessage(g_hToolbar,TB_BUTTONSTRUCTSIZE,(WPARAM)sizeof(TBBUTTON),0);
HIMAGELIST HIMAGELIST=ImageList_Create(22,22,ILC_COLORDDB,4,0);
int what0=ImageList_Add(hImageList,LoadBitmap(g_实例,MAKEINTRESOURCEW(IDB_BITMAP2)),NULL);
int what1=ImageList_Add(hImageList,LoadBitmap(g_实例,MAKEINTRESOURCEW(IDB_BITMAP3)),NULL);
int what2=ImageList_Add(hImageList,LoadBitmap(g_实例,MAKEINTRESOURCEW(IDB_BITMAP1)),NULL);
int what3=ImageList_Add(hImageList,LoadBitmap(g_实例,MAKEINTRESOURCEW(IDB_位图4)),NULL);
发送消息(g_hToolbar,TB_SETIMAGELIST,(WPARAM)0,(LPARAM)hImageList);
tbb按钮tbb[4]={
{what0,ID_NEW_STEP,TBSTATE_ENABLED,BTNS_AUTOSIZE,{0},0,(INT_PTR)L“CreateStep”},
{what1,ID_DELETE_STEP,TBSTATE_ENABLED,btn_AUTOSIZE,{0},0,(INT_PTR)L“DeleteStep”},
{what2,ID_NEW_SEGMENT,TBSTATE_ENABLED,BTNS_AUTOSIZE,{0},0,(INT_PTR)L“CreateSegment”},
{what3,ID_DELETE_SEGMENT,TBSTATE_ENABLED,btn_AUTOSIZE,{0},0,(INT_PTR)L“DELETE SEGMENT”},
};
发送消息(g_hToolbar、TB_ADDBUTTONS、4、(LPRAM)和tbb);
SendMessage(g_hToolbar,TB_SETBUTTONSIZE,0,MAKELPARAM(22,22));
发送消息(g_hToolbar,TB_AUTOSIZE,0,0);
展示窗口(g_hToolbar、SW_SHOW);
g_MDIChildHwnd=hwnd;
m_nhs=0;
设置孩子