156 Archived Topics
Remove Filter  | can i declare functions private in header files? imagine that you use a function declared outside the class and you only want be used only by that class... how can i private that function?  |
| | i'm trying create a class for getting the child controls from it's parent, but without sucess :( class ChildControls { private: vector<HWND> childcontrols; UINT childcontrolsindex; HWND windowparent; public: ChildControls(const HWND parent) { windowparent=parent; //EnumChildWindows(parent, EnumChildProc, 0); } UINT childcontrolscount() { return childcontrolsindex; } HWND GetHWND(UINT index) { EnumChildWindows( windowparent, [this]( … |
| | RegisterHotKey is for we use the combined keys and the WM_HOTKEY message. i use these function for use the alt combination... but i need ask: can i re-regist the combination keys? |
| | i'm trying call the WM_DRAWITEM message from WM_KEYUP message without sucess :( bool KeyPressed(int a) { if(GetAsyncKeyState(a)) { return true; } else { return false; } } //in WM_KEYUP message if(KeyPressed(VK_MENU)==true) SendMessage(hButton, WM_DRAWITEM,NULL,NULL); what i'm doing wrong with SendMessage? |
| | i'm reading these page: http://msdn.microsoft.com/en-us/library/windows/desktop/bb775951%28v=vs.85%29.aspx but see the Remarks section: Remarks For illustrations of the principal button styles such as BS_CHECKBOX and BS_GROUPBOX, see Button Types. The appearance of text or an icon or both on a button control depends on the BS_ICON and BS_BITMAP styles, and whether the BM_SETIMAGE … |
| | when we create child controls, what is the style for accept text formats? (i mean: '\t', '\n' and others) |
| | - the GetWindowRect() give me the window size and position; - the GetClientRect() give me the window size without inclued the scrollbars\menus\borders\others; so when 1 image is more big than client size, what size i can use? DC size? and if a child window position is more big than client … |
| | by the book, i read that with WM_SIZE message i can get the client size instead use the GetClientRect() function: case WM_SIZE: GetClientRect (hwnd, &rect) ; VerticalScrollSize=rect.bottom; si.cbSize = sizeof(si); si.fMask = SIF_ALL; GetScrollInfo (hwnd, SB_VERT, &si); si.nMin = 0; si.nPos = VerticalScroll; si.nMax = VerticalScrollSize-2; si.nPage=2; SetScrollInfo (hwnd, SB_VERT, … |
| | i'm testing the win32 scrollbars, but i'm with 1 problem: when i use the SB_THUMBPOSITION message, why the window isn't repainted( the WM_PAINT message isn't used)? case WM_VSCROLL: switch (LOWORD (wParam)) { case SB_LINEUP: VerticalScroll-=1; break; case SB_LINEDOWN: VerticalScroll+=1; break; case SB_THUMBPOSITION: VerticalScroll=HIWORD (wParam); break; case SB_PAGEDOWN: VerticalScroll+=10; break; case … |
| | "MFC is not a language; it is a native (unmanaged) class library which is a thin wrapper around the Win32 API." now see these header function: void CMyAxUICtrl::OnDraw(CDC* pdc, const CRect& rcBounds, const CRect& /*rcInvalid*/) i belive the CMyAxUICtrl is the instance\object name but it's used outside of main function: … |
| | the WindowClass.hbrBackground=(HBRUSH) CreateSolidBrush(RGB(0,255,0)); change the all windows backcolor, registed with these class(WindowClasss). and for change the DC\window backcolor we need use WM_ERASEBKGND or other messages for do it(i don't remember how). but the SetDCBrushColor() do the job, right? but seems be ignored :( i'm using it in WM_PAINT messages. can … |
| | the DrawText() function is for draw text with a rectangle size. but if the DT_VCENTER is used with DT_SINGLELINE, how can i use the "\n" and "\t" strings formats? |
| | i'm learning win32 from Programming Windows Fifth Edition book, but i need ask something about these code: /*−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− SCRNSIZE.C −− Displays screen size in a message box (c) Charles Petzold, 1998 −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−*/ #include <windows.h> #include <tchar.h> #include <stdio.h> int CDECL MessageBoxPrintf (TCHAR * szCaption, TCHAR * szFormat, ...) { TCHAR … |
| | using API functions, can i get the text rectangule? |
| | i'm building a data base.. heres what i did: 1 - create the forms and put the controls; 2 - create the Service-base DataBase(add New Item); 3 - a toolbox, on left, is showed and then i create a new table; 4 - using the mouse right button, i select(on … |
| | from VB6, i build these code for transparent: void Transparent() { SetWindowLong( hwnd, GWL_EXSTYLE, GetWindowLong(hwnd, GWL_EXSTYLE) | WS_EX_LAYERED); SetLayeredWindowAttributes (hwnd, clrBackColor, 0, LWA_COLORKEY); const char *text; text=to_string( GetLastError()).c_str(); MessageBox(NULL,text,"erro",MB_OK); } but i get 1 error from messagebox: 87:ERROR_INVALID_PARAMETER - The parameter is incorrect. can anyone advice me? |
| | how can i get the font of a control? for i change what i need and then select it |
| | i'm building the label1 class, but i'm getting bad results... so i ask: how can i use the SetWindowLongPtr() for use a window procedure? (i can show the label and change it's properties... but i'm getting problems for active it's own window procedure :( ) see the entire code\class: #include … |
| | when we overloading a function: what matters is only the argument list(inclued the types) or the return type too? i'm overloading the assigment operator, but seems that i can't use with diferent return types:( please someone explain to me |
| | can i create 1 template that i use inside the class and not when i create the class object? |
| | cout << *static_cast<int*>(test); test is a void pointer pointed to an int variable. if i use: cout << *static_cast<char*>(test); i get just 1 character. so how can i print the value directly to string? if i use the string i get an memory error |
| | i know: - &varname is the adress of varname; - *varname is the value of adressed variable. but: void *Vvariant=NULL; friend ostream& operator <<(ostream &os,const variant2 &obj) { os << obj.Vvariant; //how can i get the value of adressed variable? return os; } how can i get the value of … |
| | heres my variant class: // *** ADDED BY HEADER FIXUP *** #include <cstdlib> #include <iostream> #include <string> // *** END *** #ifndef VARIANT_H_INCLUDED #define VARIANT_H_INCLUDED class variant { string a=""; public: variant (string value="") { a=value; } variant (double value) { a=to_string(value); } friend istream& operator >>(istream &is,variant &obj) { … |
| | //write void write() { setlocale(LC_ALL, "en_US.UTF-8"); cout <<""; } template <typename A, typename ...B> void write(string argHead, B... argTail) { setlocale(LC_ALL, "en_US.UTF-8"); if (blnBlink==true) { CONSOLE_SCREEN_BUFFER_INFO csbi; GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi); string a; a=argHead; TextBlink(a, csbi.dwCursorPosition.X, csbi.dwCursorPosition.Y,csbi.wAttributes); COORD Position; Position.X=csbi.dwCursorPosition.X+strlen(a.c_str()); Position.Y=csbi.dwCursorPosition.Y; SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),Position); } else cout << argHead; write(argTail...); } template <typename A, … |
| | the function is a std::function<void(string a) write; ok.... it's void.... but why the error about it??? what means these error?  |
| | i understand that the macro is a code that is changed before compile it. so i did these macro with these code: #define (events2((y),(x))) (class events3 : public ( y ) { events3(); ~events3(); }(x) ; ) //#define (events2((y),(x))) (class events3 : public ( y ) { events3(); }(x) ; …  |
| | see these class: class test { public: void Created(){}; test() { Created(); } }; now we can create objects from it. ok. but can i overloading the scope-resolution ('::') for the object accept and change the Created() function? |
| | when we create the window, we can choose some styles. but i see 2 problems: - how can i hide the border?(i have seen the msdn styles, but theres no const for that) - how can i change the styles after create the window? |
| | i'm learning win32 from: http://www.winprog.org/tutorial/start.html but tell me(because i ear several persons) is these function correct? LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { switch(msg) { case WM_CLOSE: DestroyWindow(hwnd); break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hwnd, msg, wParam, lParam); } return 0; } the DefWindowProc() is … |
| | how can i test if the wheel move was negative or positive? i belive these detect the mouse position: xPos = GET_X_LPARAM(lParam); yPos = GET_Y_LPARAM(lParam); but how can i test if any key(like alt\control\shift) was pressed? (i'm talking in same message) |
| | see my windows procedure: LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { bool blnMouseEnter=false; switch(msg) { case WM_CLOSE: DestroyWindow(hwnd); break; case WM_KEYUP: if (wParam ==VK_ESCAPE) DestroyWindow(hwnd); else { char strDataToSend[32]; sprintf(strDataToSend, "%c", wParam); MessageBox(NULL,strDataToSend, "keyselected",MB_OK); } break; case WM_MOUSEMOVE: SetWindowText(hwnd,"hi"); break; case WM_MOUSELEAVE://is ignored :( SetWindowText(hwnd,"bye"); break; … |
| | i'm building a class with std::function for recive several parameters or none: class event2 { public: typedef std::function<void(...)> OnSomethingHandler; void operator() (...) { eventwithoutarg (...); } event & operator = (OnSomethingHandler Handler(...)) { eventwithoutarg(...) = Handler(...); return *this; } private: OnSomethingHandler eventwithoutarg(...); }; what i'm doing wrong with '...'? |
| | see these sample: template <typename a> class test { test(a argument) { cout << argument; } }; //declare it: int main() { test<string> a("hello"); } how can i do it: test a("hello"); |
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| | template <typename a, typename ... b> class events { public: typedef std::function<void( a arg, b ... argx)> OnSomethingHandler; events(OnSomethingHandler Handler) { handlers_.push_back(Handler); } void operator ()() { for(auto i = handlers_.begin(); i != handlers_.end(); ++i) (*i)(); } private: std::vector<OnSomethingHandler> handlers_; void AddHandler(OnSomethingHandler Handler) { handlers_.push_back(Handler); } void TriggerEvents() { for(auto … |
| | the csbi.wAttributes are combinations of '|' operators,... DWORD textcolor = csbi.wAttributes & 0xff0f; DWORD backcolor = (csbi.wAttributes & 0xfff0) >> 4; i understand the 0xff0f is a hexadecimal value(i don't know in decimal), but why these number and not other? can anyone explain to me these 2 calculations? (they are … |
| | i have these code for clear the screen: //clear the Console void Clear(int BackColor=0) { // home for the cursor COORD coordScreen = {0, 0}; DWORD cCharsWritten; CONSOLE_SCREEN_BUFFER_INFO csbi; DWORD dwConSize; // Get the number of character cells in the current buffer if(!GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi)) return; dwConSize = csbi.dwSize.X * csbi.dwSize.Y; … |
| | the prototype function is: BOOL WINAPI WriteConsoleOutputAttribute( _In_ HANDLE hConsoleOutput, _In_ const WORD *lpAttribute, _In_ DWORD nLength, _In_ COORD dwWriteCoord, _Out_ LPDWORD lpNumberOfAttrsWritten ); i'm trying use it for the 1st time... what means: "lpNumberOfAttrsWritten [out] A pointer to a variable that receives the number of attributes actually written to … |
| | i know use SetConsoleTextAttribute(): SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), ForgC|(BackC<<4) ); (too be honest: i don't have sure if i can avoid the '<<4') i need ask these: can i add it more data and then use it? like: Blink=128 SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), ForgC|(BackC<<4) | Blink); and then test if these value is there? |
| | by some reason the TextOut() function don't show me the text:( but see these code: #include <iostream> #include <string.h> #include <windows.h> using namespace std; int main() { HDC a=GetDC(GetForegroundWindow()); cout << GetLastError();//i get 0(no errors) Rectangle(a,3,4,3+80,4+20);//the rectangule is showed TextOut(a,10,10,"hello world",strlen("hello world")); cout << GetLastError();//i get 0(no errors) cin.get(); } … |
| | i have 1 class Multithread, but seems that i have some errors:( #include <process.h> #include <string> using namespace std; class MultiThread { private: void * b; public: void ParameterList(void *c) { b=c; } void Thread(unsigned (__stdcall*) (void *) ) { _beginthreadex(NULL, 0, (__stdcall*) (void *) , b, 0, NULL); } … |
| | can anyone explain to me what is: 'T', 'L', 'wchar_t', 'LPCWSTR' and 'LPCTSTR'? how can i convert strings\char* to these types? (i understand these isn't a tutorial, but i realy need these introdution) or you can give me just a nice link. |
| | imagine these line: cout << "glória vitória"; //glory vitory why instead print 'ó', prints '3/4'(the ascii char)??? changing the console font name, can resolve it? |
| | if C++ isn't a real OOPL, what left? with another words i want study(theory\concepts) the real OOPL. can you give me a link with these information? |
| | when i enter on windows, i see the button user name... until here, fine. but when i click it, i get 1 error about user profile. can anyone help me fix it, please? |
| | is there any function(API or something) for get 1ms of precision? i have 1 timer, but i only get 10ms of max. |
| | see these class: class test { public: void virtual Created(){} void test() { Created(); } }; class test1 : public test { void Created(); void test1(): test { Created(); } } test1; void test1::Created() { cout << "created test1"; } (these code wasn't tested, but you get the point) can … |
| | class test { virtual void created(){}; //i must do these. //or when i call the function the compiler give me an error test() { void created(); } }test; void test::created() { cout << "hello world"; } these code have 1 error. but how can overrride the created function? |
| | i want build 1 const with std::endl but by some reason isn't accepted:( #define NewLine std::endl i understand the '#define' isn't adviced to be used, but in these case i belive that i can't use the 'const':( what isn't right with that line? error message: "C:\Users\Joaquim\Documents\CodeBlocks\My Class\console.h|170|note: void Console::write(A, B … |
| | i have 1 class: class class1 { void Created(); calss1() { Created(); } } class1; void class1::Created() { cout << "hello"; } imagine that i don't write: void class1::Created() { cout << "hello"; } i get an error. i try these too: class class1 { void Created() { //do nothing … |
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