Real time graph in MFC

Baird

Anyone know how to do this or if there is a free library to enable
u to graph a line graph similar to the CPU history graph in
windows task manager
I want to pass a value from a loop and this value to be the next
point on the graph
Sounds easy but i cant do it
Any help is appreciated

Gavin

Whack up your test code there and i'll see if I can give you a hand.

Gav

Gav_b

I did somthing like that recently, hope this helps

Add a picture control to your dialog box, setting its property as type "frame" and then assign a control varible using the class wizzard, say m_filframe.
Next your going to have to draw a box, into which you are then going to add lines or what ever you need for the graph, here's some code I wrote to do so:

//create dc (see msdn)
CClientDC dc(&m_filframe);
//draw background box, passing a width and heigth
dc.FillSolidRect(0,0,Width,Heigth,RGB(51,51,51));

CPen pen; //create pen your going to draw the graph with
pen.CreatePen( PS_SOLID, 1, RGB(115,189,255));
//select the pen to start drawing
dc.SelectObject(&pen);

Once you have this done you are ready to start drawing, there are lots of function for doing lines and various shapes eg:

dc.LineTo(point1,point2);

The points will be relative to the top left corner of the rectangle you drew at the start.
To get the graph to update the drawing with new values and repaint it, your going to need a thread or a timer, if you send me an email, I have some source code for a bouncing ball program that will show you how to do this.
Gavin.