Win32 API input box
Author
Is there a Win32 API equivalent of Java's JOptionPane.showInputDialog? It basically just pops open a small dialog window with a text input and a couple of buttons. Am I going to have to create the window myself and just show that?
Thanks,
Casey
As far as I know, there isn't one. Which is a shame, there's several times that I've wanted a simple one line input box :(
Here, I made one:
(Note, I am not the best Win32 programmer, so there may be a better way to handle this. It does work though.)
#include <windows.h>#include <string>#ifdef UNICODEtypedef std::wstring InputBoxStringType;typedef LPWSTR InputBoxCharPointerType;typedef wchar_t InputBoxCharType;#define InputBoxString(x) L##x#elsetypedef std::string InputBoxStringType;typedef LPSTR InputBoxCharPointerType;typedef char InputBoxCharType;#define InputBoxString(x) x#endifLRESULT CALLBACK InputBoxWndProc(HWND WndHandle, UINT Message, WPARAM wParam, LPARAM lParam){ static InputBoxStringType *Results = 0; static HWND InputLabelHandle = 0; static HWND InputHandle = 0; switch(Message) { case WM_NCCREATE: { Results = (InputBoxStringType*)((CREATESTRUCT*)lParam)->lpCreateParams; break; } case WM_CLOSE: case WM_DESTROY: { PostQuitMessage(0); break; } case WM_COMMAND: { int NotifyCode = HIWORD(wParam); int ControlId = LOWORD(wParam); HWND ControlHandle = (HWND)lParam; switch(ControlId) { case 1001: { InputHandle = ControlHandle; break; } case 1002: { if(InputHandle == 0 || !Results) { PostQuitMessage(0); break; } InputBoxCharPointerType Buffer = new InputBoxCharType[256]; GetWindowText(InputHandle, Buffer, 256); *Results = Buffer; PostQuitMessage(0); break; } case 1003: { if(InputHandle == 0 || !Results) { PostQuitMessage(0); break; } *Results = InputBoxString(""); PostQuitMessage(0); break; } } break; } } return DefWindowProc(WndHandle, Message, wParam, lParam);}static InputBoxStringType ShowInputBox(HWND OwnerWindowHandle, const InputBoxStringType &InputLabel, const InputBoxStringType &InputText, const InputBoxStringType &Title){ WNDCLASS WndClass; HWND DialogHandle = 0; HWND InputLabelHandle = 0; HWND InputHandle = 0; HWND OkButtonHandle = 0, CancelButtonHandle = 0; InputBoxStringType Result = InputBoxString(""); ZeroMemory(&WndClass, sizeof(WNDCLASS)); WndClass.hbrBackground = GetSysColorBrush(COLOR_3DFACE); WndClass.hIcon = LoadIcon(0, IDI_APPLICATION); WndClass.hCursor = LoadCursor(0, IDC_ARROW); WndClass.hInstance = GetModuleHandle(0); WndClass.lpszClassName = InputBoxString("InputBox"); WndClass.lpfnWndProc = InputBoxWndProc; RegisterClass(&WndClass); int X = 0, Y = 0; int Width = 0, Height = 0; RECT TempRect; GetWindowRect(GetDesktopWindow(), &TempRect); Width = (int)((float)(TempRect.right - TempRect.left) * 0.25f); Height = 150; X = ((TempRect.right - TempRect.left) / 2) - (Width / 2); Y = ((TempRect.bottom - TempRect.top) / 2) - (Height / 2); DialogHandle = CreateWindowEx(0, InputBoxString("InputBox"), Title.c_str(), WS_OVERLAPPEDWINDOW | WS_VISIBLE, X, Y, Width, Height, OwnerWindowHandle, 0, GetModuleHandle(0), (LPVOID)&Result); int LabelX = 5, LabelY = 5; int LabelWidth = Width - 10, LabelHeight = 24; InputLabelHandle = CreateWindowEx(0, InputBoxString("STATIC"), InputLabel.c_str(), WS_CHILD | WS_VISIBLE, LabelX, LabelY, LabelWidth, LabelHeight, DialogHandle, 0, GetModuleHandle(0), 0); int TBoxX = 5, TBoxY = 29; int TBoxWidth = Width - 20, TBoxHeight = 24; InputHandle = CreateWindowEx(0, InputBoxString("EDIT"), InputText.c_str(), WS_BORDER | WS_CHILD | WS_VISIBLE, TBoxX, TBoxY, TBoxWidth, TBoxHeight, DialogHandle, (HMENU)1001, GetModuleHandle(0), 0); int OkBtnX = (Width / 2) - 75, OkBtnY = Height - 60; int OkBtnWidth = 75, OkBtnHeight = 24; OkButtonHandle = CreateWindowEx(0, InputBoxString("BUTTON"), InputBoxString("Ok"), WS_CHILD | WS_VISIBLE, OkBtnX, OkBtnY, OkBtnWidth, OkBtnHeight, DialogHandle, (HMENU)1002, GetModuleHandle(0), 0); int CancelBtnX = (Width / 2) + 25, CancelBtnY = Height - 60; int CancelBtnWidth = 75, CancelBtnHeight = 24; CancelButtonHandle = CreateWindowEx(0, InputBoxString("BUTTON"), InputBoxString("Cancel"), WS_CHILD | WS_VISIBLE, CancelBtnX, CancelBtnY, CancelBtnWidth, CancelBtnHeight, DialogHandle, (HMENU)1003, GetModuleHandle(0), 0); MSG Message; ZeroMemory(&Message, sizeof(MSG)); while(Message.message != WM_QUIT) { if(PeekMessage(&Message, 0, 0, 0, PM_REMOVE)) { TranslateMessage(&Message); DispatchMessage(&Message); } } return Result;}#undef InputBoxStringint WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int){ InputBoxStringType Result = ShowInputBox(0, L"Please enter your name:", L"Unknown", L"Name Entry"); MessageBox(0, Result.c_str(), L"Your name is:", MB_OK); return 0;}(Note, I am not the best Win32 programmer, so there may be a better way to handle this. It does work though.)
Quote:Original post by Programmer16I'd avoid PostQuitMessage, since that is usually used to terminate the whole program, not just a window. It might also be better to use a dialog rather than a window, since that'll handle the whole modal loop properly.
Here, I made one:
*** Source Snippet Removed ***
(Note, I am not the best Win32 programmer, so there may be a better way to handle this. It does work though.)
Quote:Original post by Evil SteveQuote:Original post by Programmer16I'd avoid PostQuitMessage, since that is usually used to terminate the whole program, not just a window. It might also be better to use a dialog rather than a window, since that'll handle the whole modal loop properly.
Here, I made one:
*** Source Snippet Removed ***
(Note, I am not the best Win32 programmer, so there may be a better way to handle this. It does work though.)
Lol, that's all foreign to me. I'll see what I can find and then re-code it.
Thanks!
Quote:Original post by Programmer16Actually, I'm not sure how easy it is to make a dialog without having a dialog template. Time for me to investigate too I think [smile]Quote:Original post by Evil SteveQuote:Original post by Programmer16I'd avoid PostQuitMessage, since that is usually used to terminate the whole program, not just a window. It might also be better to use a dialog rather than a window, since that'll handle the whole modal loop properly.
Here, I made one:
*** Source Snippet Removed ***
(Note, I am not the best Win32 programmer, so there may be a better way to handle this. It does work though.)
Lol, that's all foreign to me. I'll see what I can find and then re-code it.
Thanks!
EDIT: Aww, too easy. DialogBoxIndirect seems to be useful here. You could create a dialog in Visual Studio's resource editor, then lock the resource to get the actual buffer, and use that for DialogBoxIndirect. If that makes any sense...
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