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Reference documentation
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Reference documentation
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Thistle::LinearChart class provides a default implementation for linear charts such as barcharts and line charts. More...
Public Member Functions | |
| LinearChart (QWidget *parent=0) | |
Constructs a linear chart with the given parent. | |
 Public Member Functions inherited from AxisChart | |
| AxisChart (QWidget *parent=0) | |
| Constructs an abstract Axis chart with the given parent. | |
| ~AxisChart () | |
| Destructs the current object. | |
| AbstractAxis * | axis () const |
| Returns the current Axis instance used by this view. | |
| SerieFormat | serieFormat (int column) const |
Return the SerieFormat used for the column. | |
| void | setAxis (AbstractAxis *axis) |
| Sets the Axis use by the view to determine the item's positions. | |
| void | setSerieFormat (int column, SerieFormat style) |
Sets the given style to the given column. More... | |
| Public Member Functions inherited from AbstractChart | |
| AbstractChart (QWidget *parent=0) | |
Initializes a chart view with the given parent. More... | |
| ~AbstractChart () | |
| Destructs the object and clean the internal components. | |
| virtual QModelIndex | indexAt (const QPoint &point) const |
| Returns the model index of the item at the viewport coordinates point. | |
| ChartLegend * | legend () const |
Returns the current ChartLegend used to paint the chart legend. | |
| void | setLegend (ChartLegend *legend) |
Sets the legend used to paint the chart legend. More... | |
| void | setTitle (const QString &title) |
| Sets the title displayed at the bottom. | |
| void | setTitleFont (const QFont &font) |
Sets the QFont used to write the title. More... | |
| const QFont & | titleFont () const |
Returns the QFont used to write the title. More... | |
| Public Member Functions inherited from AbstractItemView | |
| AbstractItemView (QWidget *parent=0) | |
| Constructs an abstract item view with the given parent. | |
Protected Member Functions | |
| QList< int > | calculateColumnsOrder () const |
| Calculates the order in which the series (columns) should be drawn. More... | |
| virtual QRectF | itemRect (const QModelIndex &index) const |
| Defines the outer bounds of the item as a rectangle. More... | |
| virtual QRectF | itemRect (int row, int column, const QModelIndex &parent=QModelIndex()) const |
| This function overloads itemRect(). More... | |
| virtual void | paintChart (QPainter &painter) |
| Paints the different parts of the chart (legend, title, axis, values, etc.). | |
| virtual void | paintSerieLegend (QPainter &painter, int column, QPoint pos, int maxHeight) const |
| Paint the legend for the given column. More... | |
| virtual void | updateRects () |
| Updates the regions used to paint each part of the chart (legend, axis, values, title, etc.). More... | |
| Protected Member Functions inherited from AxisChart | |
| AxisChart (AxisChartPrivate *d, QWidget *parent=0) | |
Initializes the abstract object with the given parent. | |
| virtual void | defineRects () |
This pure virtual function defines the QRect used to to draw the different elements composing the view (series, legend, title, etc.). | |
| void | scan () |
| Scans values in the model to find the minimum and the maximum. More... | |
| Protected Member Functions inherited from AbstractChart | |
| void | calculateLegendRect (const QRect &source) |
| Calculates the rectangle in which the legend should be drawn. | |
| virtual QPainterPath | itemPath (const QModelIndex &index) const |
Returns the QPainterPath defining the item's shape. | |
| virtual void | process () |
| Analyzes the model to define the bounds and axis values. More... | |
Additional Inherited Members | |
| Public Slots inherited from AbstractChart | |
| void | updateValues () |
| Updates the displayed data in the viewport. More... | |
| Public Slots inherited from AbstractItemView | |
| virtual void | updateValues ()=0 |
| Updates the items in the item view. More... | |
Thistle::LinearChart class provides a default implementation for linear charts such as barcharts and line charts.
The Thistle::LinearChart class considers that each column from the model is a serie of values. It represents a serie with dots, lines or bars. The horizontal header contains the name of series. The vertical headers defines the x-axis data.
QStandardItemModel* model = new QStandardItemModel( 10, 2 ); model->setHorizontalHeaderLabels( QStringList() << "My values" ); model->setVerticalHeaderLabels( QStringList() << "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun" << "Jul" << "Aug" << "Sept" << "Oct" ); for ( int i = 0; i < model2->rowCount(); ++i ) { int v = qrand() % ((high + 1) - low) + low; model->setData( model->index( i, 0 ), v ); v = qrand() % ((high + 1) - low) + low; model->setData( model->index( i, 1 ), v ); } Thistle::LinearChart linear; linear.setModel( model ); Thistle::SerieFormat style = linear.serieFormat( 1 ); style.setType( Thistle::Thistle::Bar ); linear.setSerieFormat( 1, style ); linear.setTitle( "A line chart example" ); linear.show();
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protectedvirtual |
Calculates the order in which the series (columns) should be drawn.
For example, in LinearChart, the columns with the type Thistle::Bar will be drawn at first to avoid to mask the others.
Reimplemented from AxisChart.
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protectedvirtual |
Defines the outer bounds of the item as a rectangle.
All painting must be restricted to inside an item's bounding rect. Although the item's shape can be arbitrary, the bounding rect is always rectangular.
Reimplemented from AbstractItemView.
Reimplemented in RadarChart.
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protectedvirtual |
This function overloads itemRect().
Defines the outer bounds of the item as a rectangle. All painting must be restricted to inside an item's bounding rect. Although the item's shape can be arbitrary, the bounding rect is always rectangular.
Reimplemented from AbstractItemView.
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protectedvirtual |
Paint the legend for the given column.
The kind of legend should be defined by each view (linear and radial represent legend differently). The column legend is represented by a square colored with the pen and brush style and the column name.
Reimplemented from AxisChart.
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protectedvirtual |
Updates the regions used to paint each part of the chart (legend, axis, values, title, etc.).
This function is called whenever the view has been resized.
Implements AbstractChart.
Reimplemented in RadarChart.
1.8.6