[C++ API] Edit Box

powerskill · 2007-03-11T14:43:12

I know I made a post earlier relating to this, but I think it is full bad questions on my behalf. This is the cleaner better way to ask for help, I think. The program asks the user for input. The input should be stored into the HWNDedit variable, I think. Yet I have no idea how I would save that data into that variable once the user writes it into the EDIT box. Thanks for any help. Much obliged John [EDITED] for current Problem. I'm posting the full code I have now. I'm having a problem when I read off the second EDIT TEXT BOX. After debugging I saw that when I get to this line of code GetDlgItemTextA(hWnd, IDC_EDIT_YIELD, yield_buffer, 32); What ever value was entered in the first EDIT TEXT BOX, the GetDlgItemTextA function is reading that same value and storring it into yield_buffer. I traced the whole code and everything seems to be in the right place. #include <windows.h> #include <cstring> #include <string> #include "RetirementPlanner.h" #define IDC_EDIT_CONTRIBUTION 1000 #define IDC_EDIT_YIELD 1000 #define IDC_EDIT_AGE 1000 #define IDC_EDIT_retirementAGE 1000 #define IDC_EDIT_INFLATION 1000 using namespace std; RetirementPlanner savings; double dContribute = 0; double dInterest = 0; int iAgeNow = 0; int iAgeThen = 0; double dInflate = 0; LRESULT CALLBACK MainWndProc(HWND, UINT, WPARAM, LPARAM); HWND hWnd; HWND hwndEdit; HWND hwndTotPresentValue; HWND hwndTotInterest; HWND hwndContribution; HWND hwndYield; HWND hwndAge; HWND hwndRetirementAge; HWND hwndInflation; HWND hwndButtonEnter; HWND hwndButtonClear; int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { WNDCLASS wc; MSG msg; wc.lpszClassName = "Window"; wc.lpfnWndProc = MainWndProc; wc.style = CS_OWNDC | CS_VREDRAW | CS_HREDRAW; wc.hInstance = hInstance; wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); wc.hCursor = LoadCursor(NULL, IDC_ARROW); wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); wc.lpszMenuName = " "; wc.cbClsExtra = 0; wc.cbWndExtra = 0; RegisterClass(&wc); hWnd = CreateWindow ("Window", "Retirement Planner", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 500, 400, NULL, NULL, hInstance, NULL); ShowWindow(hWnd,nCmdShow); while (GetMessage(&msg, NULL, 0,0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return(int) msg.wParam; } LRESULT CALLBACK MainWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) { HWND hwndCtl = (HWND) lParam; switch(msg) { HINSTANCE hInstance; case WM_CREATE: hwndContribution = CreateWindow ("EDIT", NULL, WS_VISIBLE | WS_CHILD | WS_BORDER | ES_NUMBER, 100, 10, 90, 20, hWnd, (HMENU)IDC_EDIT_CONTRIBUTION, GetModuleHandle(NULL), NULL); hwndYield = CreateWindow ("EDIT", NULL, WS_VISIBLE | WS_CHILD | WS_BORDER | ES_NUMBER, 100, 35, 90, 20, hWnd, (HMENU)IDC_EDIT_YIELD , GetModuleHandle(NULL), NULL); hwndAge = CreateWindow ("EDIT", NULL, WS_VISIBLE | WS_BORDER | |ES_NUMBER, 100, 60, 90, 20, hWnd, (HMENU)IDC_EDIT_AGE, GetModuleHandle(NULL), NULL); hwndRetirementAge = CreateWindow ("EDIT", NULL, WS_VISIBLE | WS_CHILD | WS_BORDER | ES_NUMBER, 100, 85, 90, 20, hWnd, (HMENU) IDC_EDIT_retirementAGE , GetModuleHandle(NULL), NULL); hwndInflation = CreateWindow ("EDIT", NULL, WS_VISIBLE | WS_CHILD | WS_BORDER | ES_NUMBER, 100, 110, 90, 20, hWnd, (HMENU)IDC_EDIT_INFLATION, GetModuleHandle(NULL), NULL); hwndButtonEnter = CreateWindow ("BUTTON", "Enter", WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON, 320, 240, 55, 30, hWnd, NULL, hInstance, NULL); hwndButtonClear = CreateWindow ("BUTTON", "Reset", WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON, 256, 240, 55, 30, hWnd, NULL, hInstance, NULL); case WM_COMMAND: switch(wParam) { case BN_CLICKED: if(hwndCtl == hwndButtonEnter) { // setting up contribution char contribution_buffer[32]; GetDlgItemTextA(hWnd,IDC_EDIT_CONTRIBUTION, contribution_buffer, 32); double contribution = atoi(contribution_buffer); savings.setContribution(contribution); //class // setting up yield char yield_buffer[32]; GetDlgItemTextA(hWnd, IDC_EDIT_YIELD, yield_buffer, 32); double yield = atoi(yield_buffer); char age_buffer[32]; GetDlgItemTextA(hWnd, IDC_EDIT_AGE, age_buffer, 32); int age = atoi(age_buffer); // back to string _gcvt(contribution, 10, contribution_buffer); _gcvt(yield, 10, yield_buffer); _gcvt(age, 10, age_buffer); hwndEdit = CreateWindow ("EDIT", contribution_buffer, WS_VISIBLE | WS_CHILD | WS_BORDER | ES_LEFT, 10, 260, 90, 20, hWnd, NULL, hInstance, NULL); hwndTotPresentValue = CreateWindow ("EDIT", yield_buffer, WS_VISIBLE | WS_CHILD | WS_BORDER | ES_LEFT, 10, 285, 90, 20, hWnd, NULL, hInstance, NULL); hwndTotInterest = CreateWindow ("EDIT", age_buffer, WS_VISIBLE | WS_CHILD | WS_BORDER |ES_LEFT, 10, 310, 90, 20, hWnd, NULL, hInstance, NULL); } else if(hwndCtl == hwndButtonClear) { SetWindowText(hwndEdit, ""); SetWindowText(hwndTotPresentValue, ""); SetWindowText(hwndTotInterest, ""); SetWindowText(hwndContribution, ""); SetWindowText(hwndYield, ""); SetWindowText(hwndAge, ""); SetWindowText(hwndRetirementAge, ""); SetWindowText(hwndInflation, ""); } } break; case WM_DESTROY: PostQuitMessage(0); return 0; default: return DefWindowProc(hWnd, msg, wParam, lParam); } return 0; } [Edited by - powerskill on March 10, 2007 1:35:07 AM]

For Beginners

Started by powerskill March 09, 2007 06:10 PM

14 comments, last by powerskill 17 years, 1 month ago

powerskill

122

Author

March 10, 2007 07:45 PM

Quote:Another problem with the code - something I should have made clearer earlier - is that the output windows should be created inside WM_CREATE as well.

Oh that’s another good one :)

Quote:
You don't want to create these new every time the ENTER button is clicked.

Hmm that does sound like a bad idea. I had it to make a cool effect so that once the user clicked the Enter Button they would pop up. But I had a better thought, I'm going to create them in the correct place, but borderless, so it’s professional and I will add the text once the user clicks ENTER.

For the final result I plan to give it a background picture, and some text labels.

powerskill

122

Author

March 10, 2007 08:35 PM

Just wondering. I’m looking for it but maybe someone knows it by memory. Is there a parameter I can give the EDIT BOX so that the user cant write on it.

This is ideal for my last 3 EDIT boxes that only print out the value of the calculations, so there is no reason for the user to write in them.

PS I think I'm creating the best program ever done by me lol :)

LessBread

1,415

March 10, 2007 08:39 PM

ES_READONLY

"I thought what I'd do was, I'd pretend I was one of those deaf-mutes." - the Laughing Man

powerskill

122

Author

March 10, 2007 11:49 PM

I don't think I will use that. Its making my edit box into a grey color, and my background is white.
[edited] background is a white bmp I loaded with some 'art'.

Zahlman

1,682

March 11, 2007 03:24 AM

Quote:Original post by powerskill
I don't think I will use that. Its making my edit box into a grey color, and my background is white.

That's the normal Windows UI way of telling the user that he can't edit the control's contents, so that users don't waste time trying. You're supposed to create a background that will work with that text colour, if you need to disable controls that appear over the background.

powerskill

122

Author

March 11, 2007 02:43 PM

I'll work around that. I will add something cheap thought; I don't want the user to change the size of the window... I hope that’s not a bad idea.

[C++ API] Edit Box

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[C++ API] Edit Box

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