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Updates class diagram

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Michal Klocek Refactor documentation...	r330	/*!
Tero Ahola Fixing example documentation	r500	\example examples/barchart
sauimone Updated barchart examples and documentation. Also bug fix to barchart model	r387	\title BarChart Example
		\subtitle
Michal Klocek Refactor documentation...	r330
sauimone Updated barchart examples and documentation. Also bug fix to barchart model	r387	The example shows how to create simple bar chart. Barchart shows the data in sets as separate bars, which are grouped in categories.
Michal Klocek Refactor documentation...	r330
Tero Ahola Updated bar chart documentation	r971	\image examples_barchart.png
sauimone Updated barchart examples and documentation. Also bug fix to barchart model	r387
		First we define categories.

sauimone fixed example paths in barchart documentation	r492	\snippet ../examples/barchart/main.cpp 1
sauimone Updated barchart examples and documentation. Also bug fix to barchart model	r387
		Data that barchart visualizes, is defined by QBarSet instances. Here we create some sets and append data
Tero Ahola Updated bar chart documentation	r971	we want to visualize to them.
sauimone Updated barchart examples and documentation. Also bug fix to barchart model	r387
sauimone fixed example paths in barchart documentation	r492	\snippet ../examples/barchart/main.cpp 2
sauimone Updated barchart examples and documentation. Also bug fix to barchart model	r387
		To combine the sets and categories to a chart, we need to create QBarSeries instance. When creating
		the QBarSeries, the categories must be known. Sets can be added later. For example purposes the sets
		are added to series here.

sauimone fixed example paths in barchart documentation	r492	\snippet ../examples/barchart/main.cpp 3
sauimone Updated barchart examples and documentation. Also bug fix to barchart model	r387
Tero Ahola Updated bar chart documentation	r971	Then we create a chart and add the series to it.

sauimone fixed example paths in barchart documentation	r492	\snippet ../examples/barchart/main.cpp 4
sauimone Updated barchart examples and documentation. Also bug fix to barchart model	r387
Tero Ahola Updated bar chart documentation	r971	And we also want to show the legend, so that the data is easier to read.

sauimone fixed example paths in barchart documentation	r492	\snippet ../examples/barchart/main.cpp 5
sauimone Updated barchart examples and documentation. Also bug fix to barchart model	r387
Tero Ahola Updated bar chart documentation	r971	Finally we add the chart onto a view.

sauimone fixed example paths in barchart documentation	r492	\snippet ../examples/barchart/main.cpp 6
Tero Ahola Updated bar chart documentation	r971
		And it is ready to be shown in a window.

		\snippet ../examples/percentbarchart/main.cpp 7
		*/

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