Memory leaks when resizing 2D views
A lot of (2D) views have leaks when being resized. Compiling with VTK_DEBUG_LEAKS=ON detects no leaks at the end of the execution.
Tested on master
Leaking :
- Box chart
- Bar chart
- Histogram
- Line chart
- Parallel coordinates
- Python charts
- Point chart
- Quartile chart
Not leaking :
- Render view
- Spreadsheet view
Step to reproduce
- Open paraview and any of the views mentioned earlier.
- Resize by dragging the limit between the layout and the pipeline browser.
Loading / displaying data is not mandatory. It doesn't matter if the view is a new layout or not.
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