summaryrefslogtreecommitdiffstats
path: root/doc/src/examples-barmodelmapper.qdoc
diff options
context:
space:
mode:
Diffstat (limited to 'doc/src/examples-barmodelmapper.qdoc')
-rw-r--r--doc/src/examples-barmodelmapper.qdoc57
1 files changed, 0 insertions, 57 deletions
diff --git a/doc/src/examples-barmodelmapper.qdoc b/doc/src/examples-barmodelmapper.qdoc
deleted file mode 100644
index 81c109df..00000000
--- a/doc/src/examples-barmodelmapper.qdoc
+++ /dev/null
@@ -1,57 +0,0 @@
-/*!
- \example examples/barmodelmapper
- \title BarModelMapper example
- \subtitle
-
- This example shows how to use QAbstractItemModel derived model as the data for the bar series.
-
- \image examples_barmodelmapper.png
-
- Let's start by creating an instance of CustomTableModel class.
- The CustomTableModel class is derived from QAbstractTableModel, and it was created for the purpose of this example.
- The constructor of this class populates the model's internal data store with the data required for our chart example.
-
- \snippet ../examples/barmodelmapper/tablewidget.cpp 1
-
- We now have a model with data that we would like to display both on the chart and in a QTableView.
- First, we create QTableView and tell it to use the model as a data source. To have the data presented nicely, the minimum width of the table view is set and its headers resize mode changed to stretch.
-
- \snippet ../examples/barmodelmapper/tablewidget.cpp 2
-
- Now we need a QChart instance to display the same data on the chart.
- We also enable animations. It makes it easier to see how a modification to the model's data affects the chart.
-
- \snippet ../examples/barmodelmapper/tablewidget.cpp 3
-
- The first line of the code below creates new bar series. Variables firstRow and rowCount are used to define a custom model mapping.
- Custom mapping allows to take only part of the data from the model. In this case data from 5 rows starting with the row with the index 3.
- The following three lines create an instance of the QVBarModelMapper class and specify that the data for the bar sets should be taken from the model's columns with indexes from 1 to 4 (inclusive).
- To create a connection between the series and the model we set both of those objects to QVBarModelMapper.
-
- Finally the series is added to the chart.
-
- \snippet ../examples/barmodelmapper/tablewidget.cpp 4
-
- To show in QTableView which data corresponds with which bar set, this example uses table coloring.
- When series is added to the chart, it is assigned a color based on the currently selected theme.
- Code below extracts that color from the series and uses it to create colored QTableView.
- Coloring of the view is not a part of the QChart functionality.
-
- \snippet ../examples/barmodelmapper/tablewidget.cpp 5
-
- We would like to have categories placed on the chart's axis that describe what the data means.
- Next snippet shows how to do that.
-
- \snippet ../examples/barmodelmapper/tablewidget.cpp 6
-
- To avoid setting up the QGraphicsScene we use the QChartView class that does it for us. The QChart object pointer is used as a parameter of the QChartView constructor.
- To make the render look nicer Antialiasing is turned on and the minimum size of the chartView widget is set.
-
- \snippet ../examples/barmodelmapper/tablewidget.cpp 7
-
- Finally, we place both widgets in a layout and use the layout as the application layout.
-
- \snippet ../examples/barmodelmapper/tablewidget.cpp 8
-
- The application is ready. Try modifying the data in the table view and see how it affects the chart.
-*/