Product : Engine, Version : 4.1.6.1028, ArticleID : 41023350

Article	41023350
Type	HowTo
Product	Engine
Version	4.1.6.1028
Date Added	12/23/2003
Submitted by	itzik
Keywords

Subject

add VectorDraw in a CView class and draw simple rectangles using CRect class in VC++ 6.0

Summary

How to add VectorDraw in a CView class and draw simple rectangles using CRect class in VC++ 6.0

Solution

To add VectorDraw in a CView class:

you must derive the CView class from CFormView as follow:

1.Create a Single Document project:

2.Open the resources dialogs and add a dialog IDD_FORMVIEW:

3.Right click on form and select insert activex control->VectorDraw Standard 4.x

4.From Menu select View->ClassWizard and add a class for IDD_FORMVIEW named CvdrawForm with base class CFormView

5.On the MFC CLassWizard select Member Variables tab add double-click on IDC_VDStd1,Select ok to automatically generate C++ classes for VectorDraw

Select ok to all next dialogs and finally add a member variable named m_vdraw.Select ok to exit from ClassWizard.

6.In the ClassView explore the CSimpleViewApp and double click on the InitInstance method to change the code.

7.Change the following code:

pDocTemplate = new CSingleDocTemplate(
     IDR_MAINFRAME,
  RUNTIME_CLASS(CSimpleViewDoc),
  RUNTIME_CLASS(CMainFrame),       // main SDI frame window
    RUNTIME_CLASS(CSimpleViewView));

as follow:

pDocTemplate = new CSingleDocTemplate(
     IDR_MAINFRAME,
  RUNTIME_CLASS(CSimpleViewDoc),
  RUNTIME_CLASS(CMainFrame),       // main SDI frame window
    RUNTIME_CLASS(CvdrawForm ));

8.Go to the top of this file(simpleview.cpp) and add the

#include "vdrawForm.h"

#include "vddocument.h"
#include "vdutility.h"
#include "vdCommand.h"

9.In the ClassView right click on CvdrawForm and select Add Windows Message Handler and double click on WM_SIZE message.

10.Select Edit existing to go in the created method and modify it as follow:

    void CvdrawForm::OnSize(UINT nType, int cx, int cy)
   {
    CFormView::OnSize(nType, cx, cy);
   // TODO: Add your message handler code here

    if(::IsWindow(m_vdraw.GetSafeHwnd()))
     m_vdraw.MoveWindow(0,0,cx,cy);
    }

10.In the ClassView right click on CSimpleViewApp and select add virtual function.Select OpenDocumentFile from the list.Select Edit Existing and

modify the code as follow:

   CDocument* CSimpleViewApp::OpenDocumentFile(LPCTSTR lpszFileName)
   {
   // TODO: Add your specialized code here and/or call the base class
   CDocument* pDoc = CWinApp::OpenDocumentFile(lpszFileName);
   CMainFrame *pFrame = (CMainFrame*)AfxGetApp()->m_pMainWnd;
       // Get the active view
       CvdrawForm *pView = (CvdrawForm *) pFrame->GetActiveView();
   if(!pView->m_vdraw.GetActiveDocument().Open(lpszFileName,0,0)) return NULL;
   pView->m_vdraw.GetCommandAction().Zoom(COleVariant(_T("E")),COleVariant(_T("")),COleVariant(_T("")));
   return pDoc;
   }

11.From menu select View->ClassWizard.In the Class name select CSimpleViewApp .On the Object Ids list select

ID_FILE_NEW and on the Messages double click on COMMAND.A new function OnFileNew will be added.

On the Object Ids list select

ID_FILE_OPEN and on the Messages double click on COMMAND.A new function OnFileOpen will be added.

Modify the code as follow:

    void CSimpleViewApp::OnFileOpen()
   {
   // TODO: Add your command handler code here
   CMainFrame *pFrame = (CMainFrame*)AfxGetApp()->m_pMainWnd;
       // Get the active view
     CvdrawForm *pView = (CvdrawForm *) pFrame->GetActiveView();
    COleVariant filename = pView->m_vdraw.GetUtility().GetOpenFileName(0,_T(""),0);
    if(filename.vt == VT_EMPTY) return;
   OpenDocumentFile(CString(filename.bstrVal));
   }
   void CSimpleViewApp::OnFileNew()
   {
   // TODO: Add your command handler code here
   CWinApp::OnFileNew();
CMainFrame *pFrame = (CMainFrame*)AfxGetApp()->m_pMainWnd;
    // Get the active view
    CvdrawForm *pView = (CvdrawForm *) pFrame->GetActiveView();
   pView->m_vdraw.GetActiveDocument().New();
   pView->m_vdraw.Redraw();

}

12.You can add other commands like CmdLine Handled from CvdrawForm class directly see OnDrawLine example:

    #include "vdcommand.h"
    void CvdrawForm::OnDrawLine()
   {
    // TODO: Add your command handler code here
    m_vdraw.GetCommandAction().CmdLine(COleVariant(_T("USER")));
   }

13.Build and run your project

draw simple rectangles using CRect class

1.In the Resources Dialog section Double-Click on IDD_FORMVIEW

2.RightClick on VectorDraw control and select Events...

3.From the EventList select - double click on Draw event and add the OnDrawVdstd1 member function.

Select Edit Existing to modify the code as follow:

#include "vdRender.h"
void CvdrawForm::OnDrawVdstd1(LPDISPATCH Render, short FAR* Cancel)
{
// TODO: Add your control notification handler code here
CvdRender rend;
rend.AttachDispatch(Render,FALSE);
CDC *dc = CDC::FromHandle((HDC)rend.GetHdc());
CRect rc(0,0,100,200);
CPen pen(0,0,RGB(255,0,0));
CPen *oldpen = dc->SelectObject(&pen);
CBrush brush(RGB(0,255,0));
CBrush *oldbrush = dc->SelectObject(&brush);
dc->Rectangle(rc);
dc->SelectObject(oldpen);
dc->SelectObject(oldbrush);

}

notice:To convert from pixel to View coordinates and the opposite use the following VectorDraw methods:

PixelToVdView and VdViewToPixel

HowTo : add VectorDraw in a CView class and draw simple rectangles using CRect class in VC++ 6.0

Subject

Summary

Solution