DialogBox.cpp

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// MIT License
//
// Copyright (c) 2022 Ian Parberry
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
 
#include "DialogBox.h"
#include "resource.h"
 
UINT CDialogBox::m_nNumInputs = 0; 
 
 
HRESULT CDialogBox::GetNumInputs(HWND hwnd, UINT& n){
  DialogBox(nullptr, MAKEINTRESOURCE(IDD_DIALOG1), hwnd, (DLGPROC)DlgProc);
 
  if(m_nNumInputs < 2)
    return E_FAIL;
 
  n = (UINT)m_nNumInputs;
  return S_OK;
} //GetNumInputs
 
 
BOOL CALLBACK CDialogBox::DlgProc(HWND hDlg, UINT iMsg, WPARAM wp, LPARAM lp){
  BOOL bOK = TRUE;
 
  switch(iMsg){ 
    case WM_INITDIALOG:
      SetDlgItemInt(hDlg, IDC_EDIT1, 16, FALSE); //default number of inputs
      return TRUE;
 
    case WM_COMMAND: 
      switch(LOWORD(wp)){ 
        case IDOK: //user specifies the number of inputs
          m_nNumInputs = GetDlgItemInt(hDlg, IDC_EDIT1, &bOK, FALSE);
          if(!bOK)m_nNumInputs = 0; //something went wrong
          EndDialog(hDlg, wp); 
          return TRUE; 
 
        case IDCANCEL: //user declines
          m_nNumInputs = 0; 
          EndDialog(hDlg, wp); 
          return TRUE; 
       } //switch
    } //switch
 
    return FALSE;
} //DlgProc