I have been using QtCharts and so far it's going ok. I can create basic charts without problems. I am noticing some holes in the API which I imagine is just due to the fact that it's new.
One big problem I'm having is with zooming. The functions QChart::zoomIn() and QChart::zoomOut() only allow zooming from the center of the chart. I use the mouse wheel to zoom and I would like that to be done at the mouse's position. So far, I cannot find a way to do this. My first idea was to subclass QChart and just add a function to do it myself. The problem with this, is that all the data I need to calculate the zoom point is in QChartPrivate, so that won't work. I also thought about changing the range of the axis based on where the mouse is, but I can't see a way of getting the location of the grid lines to do an accurate calculation. All the data I need is again private. So my question is, how would I do this? How can I zoom the chart around the position of the mouse without accessing any of the private data from the QtChart package? Is there some method I'm missing? Or is the API just not able to do this right now? -- Lorne Sturtevant Sum Ergo Cogito _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
