View Full Version : detailed explaining qwt example
Hello! Please, give me source there are detailed explainings of simple examples! If you will find their sources in russian I will thanks twice! :)
jacek
27th June 2008, 16:28
Have you seen the examples that come with Qwt?
Yes, of course! But they aren't understanding without explaining! I want to read compendium about this examples!
jacek
27th June 2008, 22:43
Yes, of course! But they aren't understanding without explaining!
OK, so pick one of those examples and tell me what you would like to have explained.
OK, so pick one of those examples and tell me what you would like to have explained.
For example, I select example "realtime_plot". I don't understand destination class of IncrementalPlot!
What are doing the functions:
replot()
canvas()? Where is it's describing?
freeman_w
30th June 2008, 15:28
Hi there!
Both of them are described in "QwtPlot Class Reference"... so pick up the QwtPlot-Class
(http://qwt.sourceforge.net/class_qwt_plot.html) and browse a bit and you will find them!
But on the other side AD has a point there...
The docu isn't that advanced/complete as it should be...
I don't understand why for example, the "canvas()" member can't be found at the "Class Members" index...
There are a lot of functions that aren't indexed there...
That makes the search (and the understanding of the examples, for some people) a bit more difficult.
A good docu would really be a nice thing to have... The Qwt-docu hasn't reached that level till now... So it is ok if some people ask for it :)
jacek
9th July 2008, 21:13
For example, I select example "realtime_plot". I don't understand destination class of IncrementalPlot!
IncrementalPlot represents a plot which displays a cloud of points and allows you to add more points.
What are doing the functions:
replot()
replot() tells QwtPlot to that data has changed and the plot must be redrawn. It's because Qwt uses caching.
canvas()?
This method returns a pointer to the QwtPlotCanvas (http://qwt.sourceforge.net/class_qwt_plot_canvas.html) object. This the part of the plot on which all the drawing occurs.
Where is it's describing?
Here:
http://qwt.sourceforge.net/class_qwt_plot.html#7b094e29b8e92b00e36517d0d7633c 4b
http://qwt.sourceforge.net/class_qwt_plot.html#afcc82150034fbeb393ceb9f54ba2f 1a
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