diff options
Diffstat (limited to 'doc/src/examples-barmodelmapper.qdoc')
-rw-r--r-- | doc/src/examples-barmodelmapper.qdoc | 57 |
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. -*/ |