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.

Help Version 19.0.2017.10.27

LEADTOOLS Container and Automation C API Help

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