Editing a Container Object

Start with the project you created in Collecting Container Events.

  1. Add the following popup menu structure to the main menu you created in Implementing the Container - Initializing, Creating and Freeing

    Edit &Object 
    &Line   with ID = IDM_EDITOBJECT_LINE 
    &Square   with ID = IDM_EDITOBJECT_SQUARE 
    &Rect   with ID = IDM_EDITOBJECT_RECT 
    &Circle   with ID = IDM_EDITOBJECT_CIRCLE 
    &Ellipse   with ID = IDM_EDITOBJECT_ELLIPSE 
    P&olyline   with ID = IDM_EDITOBJECT_POLYLINE 
    &Bezier   with ID = IDM_EDITOBJECT_BEZIER 
    &Arc   with ID = IDM_EDITOBJECT_ARC 
    &Text   with ID = IDM_EDITOBJECT_TEXT 

  2. Add the following code to the WndProc function, just before the "return 0L ;" of the WM_CREATE message:

    EnableMenuItem ( GetMenu ( hWnd ), 2, MF_BYPOSITION | MF_GRAYED ) ; 

  3. Add the following lines to the WndProc function, after the EnableMenuItem function call in the "case IDM_FILE_OPEN" of the WM_COMMAND message:

    EnableMenuItem ( GetMenu ( hWnd ), 2, MF_BYPOSITION | MF_ENABLED ) ; 

  4. Add the following functions before the OnOpen function definition:

    L_VOID OnEditObjectLine ( pCONTAINERHANDLE pContainer, pBITMAPHANDLE pBitmap ) 
    { 
       CONTAINEROBJECTDATA Data ; 
       CONTAINERLINEDATA LineData ; 
       LineData.vptLine[0].x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       LineData.vptLine[0].y = ( BITMAPHEIGHT ( pBitmap ) - 1 ) / 4 ; 
       LineData.vptLine[1].x = ( ( BITMAPWIDTH ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       LineData.vptLine[1].y = ( ( BITMAPHEIGHT ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       // set the container object data 
       Data.nSize = sizeof ( CONTAINEROBJECTDATA ) ; 
       Data.nObjectType = CONTAINER_OBJECT_TYPE_LINE ; 
       Data.pObjectData = &LineData ; 
       // start editing an object 
       // double click the left-mouse button to end editing 
       // click right-mouse button to abort editing 
       L_ContainerEditObject ( pContainer, &Data ) ; 
    } 
    L_VOID OnEditObjectSquare ( pCONTAINERHANDLE pContainer, pBITMAPHANDLE pBitmap ) 
    { 
       CONTAINEROBJECTDATA Data ; 
       CONTAINERSQUAREDATA SquareData ; 
       SquareData.vptSquare[0].x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       SquareData.vptSquare[0].y = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       SquareData.vptSquare[1].x = ( ( BITMAPWIDTH ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       SquareData.vptSquare[1].y = ( ( BITMAPWIDTH ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       // set the container object data 
       Data.nSize = sizeof ( CONTAINEROBJECTDATA ) ; 
       Data.nObjectType = CONTAINER_OBJECT_TYPE_SQUARE ; 
       Data.pObjectData = &SquareData ; 
       // start editing an object 
       // double click the left-mouse button to end editing 
       // click right-mouse button to abort editing 
       L_ContainerEditObject ( pContainer, &Data ) ; 
    } 
    L_VOID OnEditObjectRect ( pCONTAINERHANDLE pContainer, pBITMAPHANDLE pBitmap ) 
    { 
       CONTAINEROBJECTDATA Data ; 
       CONTAINERRECTDATA RectData ; 
       RectData.vptRect[0].x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       RectData.vptRect[0].y = ( BITMAPHEIGHT ( pBitmap ) - 1 ) / 4 ; 
       RectData.vptRect[1].x = ( ( BITMAPWIDTH ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       RectData.vptRect[1].y = ( ( BITMAPHEIGHT ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       // set the container object data 
       Data.nSize = sizeof ( CONTAINEROBJECTDATA ) ; 
       Data.nObjectType = CONTAINER_OBJECT_TYPE_RECT ; 
       Data.pObjectData = &RectData ; 
       // start editing an object 
       // double click the left-mouse button to end editing 
       // click right-mouse button to abort editing 
       L_ContainerEditObject ( pContainer, &Data ) ; 
    } 
    L_VOID OnEditObjectCircle ( pCONTAINERHANDLE pContainer, pBITMAPHANDLE pBitmap ) 
    { 
       CONTAINEROBJECTDATA Data ; 
       CONTAINERCIRCLEDATA CircleData ; 
       CircleData.vptCircle[0].x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       CircleData.vptCircle[0].y = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       CircleData.vptCircle[1].x = ( ( BITMAPWIDTH ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       CircleData.vptCircle[1].y = ( ( BITMAPWIDTH ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       // set the container object data 
       Data.nSize = sizeof ( CONTAINEROBJECTDATA ) ; 
       Data.nObjectType = CONTAINER_OBJECT_TYPE_CIRCLE ; 
       Data.pObjectData = &CircleData ; 
       // start editing an object 
       // double click the left-mouse button to end editing 
       // click right-mouse button to abort editing 
       L_ContainerEditObject ( pContainer, &Data ) ; 
    } 
    L_VOID OnEditObjectEllipse ( pCONTAINERHANDLE pContainer, pBITMAPHANDLE pBitmap ) 
    { 
       CONTAINEROBJECTDATA Data ; 
       CONTAINERELLIPSEDATA EllipseData ; 
       EllipseData.vptEllipse[0].x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       EllipseData.vptEllipse[0].y = ( BITMAPHEIGHT ( pBitmap ) - 1 ) / 4 ; 
       EllipseData.vptEllipse[1].x = ( ( BITMAPWIDTH ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       EllipseData.vptEllipse[1].y = ( ( BITMAPHEIGHT ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       // set the container object data 
       Data.nSize = sizeof ( CONTAINEROBJECTDATA ) ; 
       Data.nObjectType = CONTAINER_OBJECT_TYPE_ELLIPSE ; 
       Data.pObjectData = &EllipseData ; 
       // start editing an object 
       // double click the left-mouse button to end editing 
       // click right-mouse button to abort editing 
       L_ContainerEditObject ( pContainer, &Data ) ; 
    } 
    L_VOID OnEditObjectPolyline ( pCONTAINERHANDLE pContainer, pBITMAPHANDLE pBitmap ) 
    { 
       CONTAINEROBJECTDATA Data ; 
       CONTAINERPOLYLINEDATA PolylineData ; 
       VECTORPOINT vptPolyline [ 4 ] ; 
       vptPolyline[0].x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       vptPolyline[0].y = ( BITMAPHEIGHT ( pBitmap ) - 1 ) / 4 ; 
       vptPolyline[1].x = ( ( BITMAPWIDTH ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       vptPolyline[1].y = ( BITMAPHEIGHT ( pBitmap ) - 1 ) / 4; 
       vptPolyline[2].x = ( ( BITMAPWIDTH ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       vptPolyline[2].y = ( ( BITMAPHEIGHT ( pBitmap ) - 1 ) * 3 ) / 4 ; 
       vptPolyline[3].x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       vptPolyline[3].y = ( ( BITMAPHEIGHT ( pBitmap ) - 1 ) * 3 ) / 4 ; 
        
       PolylineData.pvptPoints = vptPolyline ; 
       PolylineData.nPointCount = 4 ; 
        
       // set the container object data 
       Data.nSize = sizeof ( CONTAINEROBJECTDATA ) ; 
       Data.nObjectType = CONTAINER_OBJECT_TYPE_POLYLINE ; 
       Data.pObjectData = &PolylineData ; 
       // start editing an object 
       // double click the left-mouse button to end editing 
       // click right-mouse button to abort editing 
       L_ContainerEditObject ( pContainer, &Data ) ; 
    } 
    L_VOID OnEditObjectBezier ( pCONTAINERHANDLE pContainer, pBITMAPHANDLE pBitmap ) 
    { 
       CONTAINEROBJECTDATA Data ; 
       CONTAINERBEZIERDATA BezierData ; 
       BezierData.vptBezier[0].x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       BezierData.vptBezier[0].y = ( ( BITMAPHEIGHT ( pBitmap ) - 1 ) * 3 ) / 4; 
       BezierData.vptBezier[1].x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 2 ; 
       BezierData.vptBezier[1].y = ( BITMAPHEIGHT ( pBitmap ) - 1 ) / 4 ; 
       BezierData.vptBezier[2].x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 2 ; 
       BezierData.vptBezier[2].y = ( ( BITMAPHEIGHT ( pBitmap ) - 1 ) * 3 ) / 4; 
       BezierData.vptBezier[3].x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       BezierData.vptBezier[3].y = ( BITMAPHEIGHT ( pBitmap ) - 1 ) / 4 ; 
        
       // set the container object data 
       Data.nSize = sizeof ( CONTAINEROBJECTDATA ) ; 
       Data.nObjectType = CONTAINER_OBJECT_TYPE_BEZIER ; 
       Data.pObjectData = &BezierData ; 
       // start editing an object 
       // double click the left-mouse button to end editing 
       // click right-mouse button to abort editing 
       L_ContainerEditObject ( pContainer, &Data ) ; 
    } 
    L_VOID OnEditObjectArc ( pCONTAINERHANDLE pContainer, pBITMAPHANDLE pBitmap ) 
    { 
       CONTAINEROBJECTDATA Data ; 
       CONTAINERARCDATA ArcData ; 
       ArcData.vptCenter.x = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 2 ; 
       ArcData.vptCenter.y = ( BITMAPHEIGHT ( pBitmap ) - 1 ) / 2 ; 
       ArcData.Radius = ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4 ; 
       ArcData.StartAngle = 10 ; 
       ArcData.SweepAngle = 45 ; 
       // set the container object data 
       Data.nSize = sizeof ( CONTAINEROBJECTDATA ) ; 
       Data.nObjectType = CONTAINER_OBJECT_TYPE_ARC ; 
       Data.pObjectData = &ArcData ; 
       // start editing an object 
       // double click the left-mouse button to end editing 
       // click right-mouse button to abort editing 
       L_ContainerEditObject ( pContainer, &Data ) ; 
    } 
    L_VOID OnEditObjectText ( pCONTAINERHANDLE pContainer, pBITMAPHANDLE pBitmap ) 
    { 
       CONTAINEROBJECTDATA Data ; 
       CONTAINERTEXTDATA TextData ; 
       TextData.pszText  = TEXT("LEAD TECHNOLOGIES, INC.") ; 
       TextData.cbLength = lstrlen( TextData.pszText ) * sizeof (L_TCHAR); 
       SetRect ( &TextData.rcText, 
       ( BITMAPWIDTH ( pBitmap ) - 1 ) / 4, 
       ( BITMAPHEIGHT ( pBitmap ) - 1 ) / 4, 
       ( ( BITMAPWIDTH ( pBitmap ) - 1 ) * 3 ) / 4, 
       ( ( BITMAPHEIGHT ( pBitmap ) - 1 ) * 3 ) / 4 ) ; 
       // set the container object data 
       Data.nSize = sizeof ( CONTAINEROBJECTDATA ) ; 
       Data.nObjectType = CONTAINER_OBJECT_TYPE_TEXT ; 
       Data.pObjectData = &TextData ; 
       // start editing an object 
       // double click the left-mouse button to end editing 
       // click right-mouse button to abort editing 
       L_ContainerEditObject ( pContainer, &Data ) ; 
    } 

  5. Add the following code to the WndProc function, after the statement "return 0L ;" of the case IDM_DRAWOBJECT_TEXT of the WM_COMMAND message:

    case IDM_EDITOBJECT_LINE: 
       OnEditObjectLine ( pContainer, &hBitmap ) ; 
       return 0L ; 
    case IDM_EDITOBJECT_SQUARE: 
       OnEditObjectSquare ( pContainer, &hBitmap ) ; 
       return 0L ; 
    case IDM_EDITOBJECT_RECT: 
       OnEditObjectRect ( pContainer, &hBitmap ) ; 
       return 0L ; 
    case IDM_EDITOBJECT_CIRCLE: 
       OnEditObjectCircle ( pContainer, &hBitmap ) ; 
       return 0L ; 
    case IDM_EDITOBJECT_ELLIPSE: 
       OnEditObjectEllipse ( pContainer, &hBitmap ) ; 
       return 0L ; 
    case IDM_EDITOBJECT_POLYLINE: 
       OnEditObjectPolyline ( pContainer, &hBitmap ) ; 
       return 0L ; 
    case IDM_EDITOBJECT_BEZIER: 
       OnEditObjectBezier ( pContainer, &hBitmap ) ; 
       return 0L ; 
    case IDM_EDITOBJECT_ARC: 
       OnEditObjectArc ( pContainer, &hBitmap ) ; 
       return 0L ; 
    case IDM_EDITOBJECT_TEXT: 
       OnEditObjectText ( pContainer, &hBitmap ) ; 
       return 0L ; 

  6. Compile and run the project by selecting Build->Rebuild Solution from the menu, and then Debug->Start Without Debugging.

Help Version 22.0.2021.8.20
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© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.

LEADTOOLS Container and Automation C API Help
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.