guiqwt huge data

[Denis Sidorov]

Hello,

I have some troubles when I make guiqwt show huge numpy array (float32*2e6, memory overflow). Current recipe to solve the problem is rarefy numpy array before ``set_data`` (array[1::r_coef], r_ceof is increased with data size increasing). But I can lose information on zooming in and this makes me return data from source array.

I can't find a signal, which emits on curve's resizing before replot. How to capture this event, to modify data for quiqwt before replot?

Is there any other recipe for huge data showing with guiqwt?

Thanks in advance.

[Eric McDonald]

I overloaded something deep in CurveDialog, maybe MouseClickEvent? on the curve widget (I don't have my code handy), and checked for middle-click or right-click (pan or zoom), and then handled it there. Otherwise, I let the event pass up the chain.

I never tried to catch any signals. My method is basically a monkey-patch.

Good luck,
Eric

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