Let use default size policy.
Do not generate QStrings.
Display mouse position.
Correct typing error.
Put the graph into a layout.
Context menu progress.
Morning Merge: Fixed bug in LegendListContextMenu
Add fill option to the curves.
Show and hide curves.
Merging Armandos solution for bar plots in MatPlotLibBackend.py
Handle hide/show points and lines.
Prevent crash with symbol equal to empty string.
Remove print statement.
ModestImage does not work under Python 3.3
Python 3.3 compatible.
Draw Histogram using fill option
Comment out some imports in Matplotlib
Merge remote-tracking branch 'upstream/master'
Try to avoid data duplication.
Implement addItem