Vector Load and Save

To add vector load and save functionality:

Start with the project you created in Creating an Empty Vector Handle and Attaching it to a Window.

 

1.

In the solution explorer view open the Resources Files then double click on tutorial.rc

2.

Select IDC_TUTORIAL under the Menu

3.

Modify the Menu structure to be as the following:

IDR_MENU1

     &File
     &Open… with ID = IDM_OPEN
     &Save… with ID = IDM_SAVE
     E&xit with ID = IDM_EXIT

 

4.

Select File->Save All from the menu.

5.

Edit the _tWinMain function and change the line:

WndClass.lpszMenuName = NULL;

To:

WndClass.lpszMenuName = MAKEINTRESOURCE( IDC_TUTORIAL);

 

6.

Add the following lines at the beginning of the tutorial.cpp file ander #include "stdafx.h"

#include <commdlg.h>

#include "C:\Program Files\LEAD Technologies\LEADTOOLS EVAL 16\Include\ltdlg.h"

 

7.

Add these local variables under HDC hDC; in the WndProc function:

static OPENFILENAME OpenFileName;
static L_TCHAR szFileName[ _MAX_PATH ];
static L_TCHAR szFileTitle[ _MAX_PATH ];
static L_TCHAR *szFilter[] = { TEXT("All Files\0*.*\0") };
L_INT nRet;

 

8.

Add these lines right after ResetView( hWnd, &Vector ); in WM_CREATE handle:

// reset the OPENFILENAME structure
memset( &OpenFileName, 0, sizeof( OPENFILENAME ) );
OpenFileName.lStructSize = sizeof( OPENFILENAME );
OpenFileName.hwndOwner = hWnd;
OpenFileName.lpstrFilter = szFilter[ 0 ];
OpenFileName.lpstrFile = szFileName;
OpenFileName.nMaxFile = _MAX_PATH;
OpenFileName.lpstrFileTitle = szFileTitle;
OpenFileName.nMaxFileTitle = _MAX_PATH;

 

9.

Modify the WM_COMMAND case in WndProc to be as the following

case WM_COMMAND:

      wmId    = LOWORD(wParam);

      wmEvent = HIWORD(wParam);

      // Parse the menu selections:

      switch (wmId)

      {

      case IDM_ABOUT:

           DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd,

About);

        break;

      case IDM_OPEN:

         OpenFileName.Flags = OFN_HIDEREADONLY;

         if( GetOpenFileName( &OpenFileName ) )

         {

            // open the vector file

            nRet = L_VecLoadFile ( szFileName, &Vector, NULL,

NULL );

            if( nRet != SUCCESS )

               MessageBox( hWnd, TEXT("Cannot open file!"),

   TEXT("Error"), MB_ICONEXCLAMATION );

 

            GetClientRect( hWnd, &Rect );

            L_VecSetViewport ( &Vector, &Rect );

 

            ResetView( hWnd, &Vector );

         }

         break;

      case IDM_SAVE:

         OpenFileName.Flags = OFN_HIDEREADONLY |

   OFN_OVERWRITEPROMPT;

         if( GetSaveFileName( &OpenFileName ) )

         {

            // save the vector file

            nRet = L_VecSaveFile ( szFileName, &Vector, FILE_DXF,

NULL );

            if( nRet != SUCCESS )

               MessageBox( hWnd, TEXT("Cannot save file!"),

   TEXT("Error"), MB_ICONEXCLAMATION );

         }

         break;

      case IDM_EXIT:

         DestroyWindow(hWnd);

         break;

      default:

         return DefWindowProc(hWnd, message, wParam, lParam);

        }

 break;

 

10.

Modify the Imports.cpp file to be as the following:
#include "stdafx.h"

#if defined(WIN64)

#pragma comment( lib, "..\\..\\..\\..\\Lib\\CDLL\\x64\\Lvkrn_x.lib")

#pragma comment( lib, "..\\..\\..\\..\\Lib\\CDLL\\x64\\Ltkrn_x.lib")

#pragma comment( lib, "..\\..\\..\\..\\Lib\\CDLL\\x64\\Ltfil_x.lib")

#else

#pragma comment( lib, "..\\..\\..\\..\\Lib\\CDLL\\Win32\\Lvkrn_u.lib")

#pragma comment( lib, "..\\..\\..\\..\\Lib\\CDLL\\Win32\\Ltkrn_u.lib")

#pragma comment( lib, "..\\..\\..\\..\\Lib\\CDLL\\Win32\\Ltfil_u.lib")

#endif

 

11.

Compile and run the project. You will be able to view, load and save vector files as you browse your local hard disk.