Re: Bargraphs

From:

"AliR $VC++ MVP$" <AliR@online.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 25 Jan 2008 22:40:29 GMT

Message-ID:

<xztmj.507$5K1.376@newssvr12.news.prodigy.net>

In case your answer to my question is yes.
Here is the code to draw a bitmap as the background.

void CBarChart::OnPaint()
{
   CPaintDC dc(this); // device context for painting

   CRect cr;
   GetClientRect(&cr);

   //create a memory dc and memory bitmap to draw on,
   //later we will dump everything on the screen at
   //the same time
   CDC MemDC;
   MemDC.CreateCompatibleDC(&dc);

   int SavedDC1 = MemDC.SaveDC();

   CBitmap MemBitmap;
   MemBitmap.CreateCompatibleBitmap(&dc,cr.Width(),cr.Height());
   MemDC.SelectObject(&MemBitmap);

   //load background bitmap
   CBitmap Bitmap;
   Bitmap.LoadBitmap(IDB_BITMAP1);
   BITMAP BmpInfo;
   Bitmap.GetBitmap(&BmpInfo);

   CDC MemDC2;
   MemDC2.CreateCompatibleDC(&dc);

   int SavedDC2 = MemDC2.SaveDC();

   //copy bitmap to memory dc.
   MemDC2.SelectObject(&Bitmap);
   MemDC.StretchBlt(0,0,cr.Width(),cr.Height(),&MemDC2,0,0,BmpInfo.bmWidth,BmpInfo.bmHeight,SRCCOPY);

   MemDC2.RestoreDC(SavedDC2);

   //draw the graphs on the memory DC
   CBrush GreenBrush(RGB(100,255,100));

   int c=15,b=5;
   int d = (cr.Width()-20)/m_Array.GetCount();

   MemDC.SelectObject(GreenBrush);
   for (b=0; b<m_Array.GetCount(); b++)
   {
      int a = m_Array.GetAt(b);
      MemDC.Rectangle(c, cr.Height()-10, c+20, cr.Height()-a-10);
      c+=d;
   }

   //dump everything from memory dc to dialog
   dc.BitBlt(0,0,cr.Width(),cr.Height(),&MemDC,0,0,SRCCOPY);

   MemDC.RestoreDC(SavedDC1);

}

AliR.

"AliR (VC++ MVP)" <AliR@online.nospam> wrote in message
news:posmj.490$xq2.174@newssvr21.news.prodigy.net...

Refer back to the original code that I gave you. The drawing of the bar
chart was inside a CStatic derived class (CBarChart) not the dialog box
OnPaint.
So put the code back to that, place a static control or picture box on the
dialog box, then right click on it to add a variable then change the type
from CStatic to CBarChart.

Here is the link to the original post: Look at the last post on the bottom
of the page:
http://groups.google.com/group/microsoft.public.vc.mfc/browse_thread/thread/2f8995d9590defb/86fd92bc07209502?lnk=gst&q=Kahlua#86fd92bc07209502

Do you also want to display a bitmap inside the picture box?

AliR.

"Kahlua" <kahlua@right.here> wrote in message
news:IFrmj.27$u_5.16@trndny09...

The code I have written to draw the bargraph does draw the bars properly
when I click OnButton1.
How do I modify the code so that it will draw the bargraph inside a
picture box?
I have added a IDC_PIC1 as a picture box in my dialog.
Thanks.
This is my main code so far:
=========================================================
BOOL CMartin1Dlg::OnInitDialog()
{
CDialog::OnInitDialog();

SetIcon(m_hIcon, TRUE);
SetIcon(m_hIcon, FALSE);

int i;
for (i=0; i<33; i++) //initialize bars to zero
   bar[i] = 0;

return TRUE;
}

void CMartin1Dlg::OnPaint()
{
CPaintDC dc(this); // device context for
painting

int SavedDC = dc.SaveDC();

CRect cr;
GetClientRect(&cr);

CBrush GreenBrush(RGB(100,255,100));
CBrush WhiteBrush(RGB(255,255,255));
int c=15,b=5,d ; //initialize variables
dc.SelectObject(WhiteBrush);
dc.Rectangle(0,0,cr.Width(), cr.Height());

dc.SelectObject(GreenBrush);
for (b=0; b<10; b++)
{
   dc.Rectangle(c, cr.Height()-50, c+10, cr.Height()-50-bar[b]);
   c+=d;
}
dc.RestoreDC(SavedDC);
}

HCURSOR CMartin1Dlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}

void CMartin1Dlg::OnButton1()
{
int i;

for (i=0;i<10;i++)
   bar[i]=i*10;
Invalidate(false);
}