The Automation and the Container

Start with the project you created in Implementing the Paint Automation Initializing, Creating and Freeing.

1. Add the following declaration to the WndProc function:

   static pCONTAINERHANDLE pContainer ; 

2. Add the following code to the WndProc function after the ReleaseDC statement in the ID_FILE_OPEN of the WM_COMMAND message:

   {//AUTOMATION CONTAINER STUFF 
      CONTAINERPAINTDATA PaintData; 
      {//REMOVE THE OLD CONTAINER (IF ANY) 
         if (SUCCESS == L_ContainerIsValid(pContainer)) 
         { 
            L_AutRemoveContainer(pAutomation, pContainer);             
            L_ContainerFree(pContainer); 
         } 
      }//REMOVE THE OLD CONTAINER (IF ANY) 
      PaintData.pBitmap = &hBitmap; 
      PaintData.hRestrictionPalette = hPalette; 
      L_ContainerInit(&pContainer); 
      L_ContainerCreate(pContainer, hWnd); 
      L_AutAddContainer(pAutomation, pContainer, &PaintData); 
   }//AUTOMATION CONTAINER STUFF 

3. Add the following code before the L_AutFree function call in the WndProc function in the WM_DESTROY message:

   if ( SUCCESS == L_ContainerIsValid ( pContainer ) ) 
   { 
      L_AutRemoveContainer ( pAutomation, pContainer ) ; 
      L_ContainerFree ( pContainer ) ; 
   } 

4. Add the following declaration to the WndProc function:

   VECTORPOINT vptScalarNum, vptScalarDen ; 

5. Add the following lines before the OnSize function call in the "case WM_SIZE:" in the WndProc function:

   if ( SUCCESS == L_ContainerIsValid ( pContainer ) ) 
   { 
      L_ContainerGetScalar ( pContainer, &vptScalarNum, &vptScalarDen ) ; 
      nScalarNum = ( L_INT ) vptScalarNum.x ; 
      nScalarDen = ( L_INT ) vptScalarDen.x ; 
   } 

6. Add the following container function call after the OnSize function call in the "case WM_SIZE:" in the WndProc function:

   L_ContainerSetOffset ( pContainer, - rcView.left, - rcView.top, 0 ) ;  

7. Add the following container function call after the OnHScroll function call in the "case WM_HSCROLL:" in the WndProc function:

   L_ContainerSetOffset ( pContainer, - rcView.left, - rcView.top, 0 ) ; 

8. Add the following container function call after the OnVScroll function call in the "case WM_VSCROLL:" in the WndProc function:

   L_ContainerSetOffset ( pContainer, - rcView.left, - rcView.top, 0 ) ; 

9. Compile and run the project by selecting Build->Execute tutorial.exe from the menu.