Problem using setAxisScaleDraw and QwtPlotZoomer

[Uwe]

Qwt classes only know about doubles - the fact that those are somehow related to date/time values is completely in your code.

Uwe

[cesroc]

Uwe, sorry, but I didn't understand what you meant.
Can you explain again?
Thanks

[Uwe]

Uwe, sorry, but I didn't understand what you meant.

Eliminate the effect of using date/time temporarily and use a usual QwtScaleDraw object - so, that you can compare the visual result more easily to what happens when you zoom in.
Then check what rectangles are selected by the zoomer ( use the debugger, or connect to the signals of QwtPlotZoomer/QwtPlotPicker ). Then we have more information about where to look for the problem.

Note that you are using the inofficial patch for more than 4 axes. Maybe this is a problem related to using a wrong axis index because of it.

Uwe

[cesroc]

Hello Uwe,

If I eliminate the date/time the problem persists. The same result. I checked the rectangles and it's right. I tried to use the rectangle's first and last point as x-axis and It doesn't work. It prints as I showed before, just a small piece on the screen's center. I don't think my problem is because of the patch, because I'm using the MultiYAxis patch, I'm applying just for the y-axis, I don't have and use a patch on my x-axis. I have just the two x-axis that Qwt provides, top and bottom.

Do you have any other idea?

Thanks in advance

[Uwe]

Please simplify your code as far as possible and find values for the scale, that you can show the problem with a simple call of setAxisScale. Then try the same with a version without using the multi-axes patch.

When the problem is still there upload your demo code as it is and I will have a look at it. If the problem is gone without the multi-axes patch upload a tarball with your patched Qwt version too.

Uwe