legendpiechartqgis
I would like to display some pie charts on my map. They show in the map frame perfectly but in legend on the print composer I am unable to show the legend for the pie charts. QGIS just shows the style of the point underneath the pie.
Is it possible to get these shown?
Using QGIS v1.8 from OSGEO4W on Windows XP
QGIS uses the PAL library to determine the "best" diagram position, which places diagrams, based on render context information such as DPI, zoom level...
To get diagrams to render at the same place every time, you can either use the placement method "Over Point" which will always put the diagrams over the centroid of the polygon.
Or you can specify the place, where you want to put the diagram yourself with "Data defined position" using attributes.
I don't think there is a way to dynamically intercept the (PAL-calculated) diagram position before they are drawn in order to adjust your line nodes.
Hint: To manually define x and y attributes for placement, you can first "prepare" them with labels. Label your layer with whatever attribute and enable data defined placement. Then use the "move label" tool to position your labels, wherever you would like to have the diagrams placed. Now disable labeling and enable diagrams with data defined placement.
Something like this.You can add table of layer contents.
Best Answer
Someone has written a small external application which creates legends for pie-charts, the format of the legend is SVG. It looks excellent, have a look here:
http://www.qgis.nl/2012/05/02/staafdiagrammen/?lang=en