Creating a Graph Plotter with MFC

naith · #1 22-Oct-2006, 00:05

I'm writing a program that takes a value in from the user and plots out a sin graph. But I can't seem to get it to do the plotting. I think its taking in the value from the user, but it can't process the value I think. This is the portion of the code that is suppose to plot out the graph:

CPP / C++ / C Code:

void CTemp5View::OnOptionTime() 
{
	// TODO: Add your command handler code here
	CTimeDlg dlg;
	dlg.m_time = X;

	if (dlg.DoModal() == IDOK)
	{
	CPaintDC dc(this); // device context for painting
	
	X = dlg.m_time;
	Y = sin (X);

	CPen PenBlack;
	PenBlack.CreatePen(PS_SOLID, 1, BLACK_PEN);
	dc.SelectObject(&PenBlack);

	XF = (X * 0.72) +40;
	YF = 200 - (Y * 0.0055);

	dc.MoveTo( XF, 200);
	dc.LineTo( XF, YF);
	}
}

Could someone please help me out?

Dominic · #2 26-Oct-2006, 03:45

Just a couple of ideas.
1. The code in the If statement will only be processed once the dialog has been closed (window destroyed). What user input value it may have had is then lost, unless you write a get function to acquire it from the dialog, before the dialog is deleted at the return from the function.

2. I dont see any means of looping through diffent values of amplitude with respect to time. Is this software supposed to be in a loop?

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Rate This Thread
Rate This Thread:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Help with graph application	linkin	CPP / C++ Forum	0	28-Oct-2005 01:42
how to get Call graph for applications, anybody knows	bravetanveer	C Programming Language	1	29-Sep-2005 23:27
Creating A Graph In C	lilmainy	C Programming Language	0	20-Apr-2005 10:40
Help creating lists of pointers	The_Kingpin	C Programming Language	0	11-Dec-2004 13:49
Problem with the function creating updating a linked list	nkhambal	C Programming Language	3	28-Oct-2004 20:45

Creating a Graph Plotter with MFC

Re: Creating a Graph Plotter with MFC