Wt  3.3.9
Public Member Functions | Protected Member Functions | List of all members
Wt::Chart::WPieChart Class Reference

A pie chart. More...

#include <Wt/Chart/WPieChart>

Inheritance diagram for Wt::Chart::WPieChart:
Inheritance graph
[legend]

Public Member Functions

 WPieChart (WContainerWidget *parent=0)
 Creates a new pie chart.
 
void setLabelsColumn (int column)
 Sets the model column that holds the labels. More...
 
int labelsColumn () const
 Returns the model column used for the labels. More...
 
void setDataColumn (int modelColumn)
 Sets the model column that holds the data. More...
 
int dataColumn () const
 Returns the model column used for the data. More...
 
void setBrush (int modelRow, const WBrush &brush)
 Customizes the brush used for a pie segment. More...
 
WBrush brush (int modelRow) const
 Returns the brush used for a pie segment. More...
 
void setExplode (int modelRow, double factor)
 Sets the explosion factor for a pie segment. More...
 
double explode (int modelRow) const
 Returns the explosion factor for a segment. More...
 
void setPerspectiveEnabled (bool enabled, double height=1.0)
 Enables a 3D perspective effect on the pie. More...
 
bool isPerspectiveEnabled () const
 Returns whether a 3D effect is enabled. More...
 
void setShadowEnabled (bool enabled)
 Enables a shadow effect. More...
 
bool isShadowEnabled () const
 Returns whether a shadow effect is enabled. More...
 
void setStartAngle (double degrees)
 Sets the angle of the first segment. More...
 
double startAngle () const
 Returns the angle of the first segment. More...
 
void setAvoidLabelRendering (double percent)
 Sets the percentage value to avoid rendering of label texts. More...
 
double avoidLabelRendering () const
 Returns the percentage to avoid label rendering. More...
 
void setDisplayLabels (WFlags< LabelOption > options)
 Configures if and how labels should be displayed. More...
 
WFlags< LabelOptiondisplayLabels () const
 Returns options set for displaying labels. More...
 
void setLabelFormat (const WString &format)
 Sets the label format. More...
 
WString labelFormat () const
 Returns the label format string. More...
 
WWidgetcreateLegendItemWidget (int index, WFlags< LabelOption > options)
 Creates a widget which renders the a legend item. More...
 
virtual void addDataPointArea (int row, int column, WAbstractArea *area) const
 Adds a data point area (used for displaying e.g. tooltips). More...
 
virtual WContainerWidgetcreateLabelWidget (WWidget *textWidget, WPainter *painter, const WRectF &rect, Wt::WFlags< AlignmentFlag > alignmentFlags) const
 createLabelWidget possition textWidget where the text would be rendered. Assuming that textWidget is added to a container with same dimensions as the WPieChart. This should be used in combinaltion with drawLabel(). More...
 
virtual void paint (WPainter &painter, const WRectF &rectangle=WRectF()) const
 Paint the chart in a rectangle of the given painter. More...
 
- Public Member Functions inherited from Wt::Chart::WAbstractChart
virtual ~WAbstractChart ()
 Destructor.
 
void setModel (WAbstractItemModel *model)
 Sets the model. More...
 
void setModel (WAbstractChartModel *model)
 Sets the model. More...
 
WAbstractChartModelmodel () const
 Returns the model. More...
 
WAbstractItemModelitemModel () const
 Returns the model. More...
 
void setBackground (const WBrush &background)
 Sets a background for the chart. More...
 
const WBrushbackground () const
 Returns the background of the chart. More...
 
void setPalette (WChartPalette *palette)
 Set a palette for the chart. More...
 
WChartPalettepalette () const
 Returns the palette for the chart. More...
 
void setPlotAreaPadding (int padding, WFlags< Side > sides=All)
 Set an internal margin for the main plot area. More...
 
int plotAreaPadding (Side side) const
 Returns the internal margin for the main plot area. More...
 
void setAutoLayoutEnabled (bool enabled=true)
 Configures the chart layout to be automatic. More...
 
bool isAutoLayoutEnabled () const
 Returns whether chart layout is computed automatically. More...
 
void setTitle (const WString &title)
 Set a chart title. More...
 
const WStringtitle () const
 Return the chart title. More...
 
void setTitleFont (const WFont &titleFont)
 Set the font for the chart title. More...
 
const WFonttitleFont () const
 Returns the font for the chart title. More...
 
- Public Member Functions inherited from Wt::WPaintedWidget
 WPaintedWidget (WContainerWidget *parent=0)
 Create a new painted widget.
 
 ~WPaintedWidget ()
 Destructor.
 
void setPreferredMethod (Method method)
 Sets the preferred rendering method. More...
 
Method preferredMethod () const
 Returns the preferred rendering method. More...
 
void update (WFlags< PaintFlag > flags=0)
 Lets the widget repaint itself. More...
 
virtual void resize (const WLength &width, const WLength &height)
 Resizes the widget. More...
 
void addArea (WAbstractArea *area)
 Adds an interactive area. More...
 
void insertArea (int index, WAbstractArea *area)
 Inserts an interactive area. More...
 
void removeArea (WAbstractArea *area)
 Removes an interactive area. More...
 
WAbstractAreaarea (int index) const
 Returns the interactive area at the given index. More...
 
const std::vector< WAbstractArea * > areas () const
 Returns the interactive areas set for this widget. More...
 
JSlotrepaintSlot ()
 A JavaScript slot that repaints the widget when triggered. More...
 
- Public Member Functions inherited from Wt::WInteractWidget
 WInteractWidget (WContainerWidget *parent=0)
 Create an InteractWidget with optional parent.
 
EventSignal< WKeyEvent > & keyWentDown ()
 Event signal emitted when a keyboard key is pushed down. More...
 
EventSignal< WKeyEvent > & keyPressed ()
 Event signal emitted when a "character" was entered. More...
 
EventSignal< WKeyEvent > & keyWentUp ()
 Event signal emitted when a keyboard key is released. More...
 
EventSignalenterPressed ()
 Event signal emitted when enter was pressed. More...
 
EventSignalescapePressed ()
 Event signal emitted when escape was pressed. More...
 
EventSignal< WMouseEvent > & clicked ()
 Event signal emitted when a mouse key was clicked on this widget. More...
 
EventSignal< WMouseEvent > & doubleClicked ()
 Event signal emitted when a mouse key was double clicked on this widget. More...
 
EventSignal< WMouseEvent > & mouseWentDown ()
 Event signal emitted when a mouse key was pushed down on this widget. More...
 
EventSignal< WMouseEvent > & mouseWentUp ()
 Event signal emitted when a mouse key was released on this widget. More...
 
EventSignal< WMouseEvent > & mouseWentOut ()
 Event signal emitted when the mouse went out of this widget. More...
 
EventSignal< WMouseEvent > & mouseWentOver ()
 Event signal emitted when the mouse entered this widget. More...
 
EventSignal< WMouseEvent > & mouseMoved ()
 Event signal emitted when the mouse moved over this widget. More...
 
EventSignal< WMouseEvent > & mouseDragged ()
 Event signal emitted when the mouse is dragged over this widget. More...
 
EventSignal< WMouseEvent > & mouseWheel ()
 Event signal emitted when the mouse scroll wheel was used. More...
 
EventSignal< WTouchEvent > & touchStarted ()
 Event signal emitted when a finger is placed on the screen. More...
 
EventSignal< WTouchEvent > & touchEnded ()
 Event signal emitted when a finger is removed from the screen. More...
 
EventSignal< WTouchEvent > & touchMoved ()
 Event signal emitted when a finger, which is already placed on the screen, is moved across the screen. More...
 
EventSignal< WGestureEvent > & gestureStarted ()
 Event signal emitted when a gesture is started. More...
 
EventSignal< WGestureEvent > & gestureChanged ()
 Event signal emitted when a gesture is changed. More...
 
EventSignal< WGestureEvent > & gestureEnded ()
 Event signal emitted when a gesture is ended. More...
 
void setDraggable (const std::string &mimeType, WWidget *dragWidget=0, bool isDragWidgetOnly=false, WObject *sourceWidget=0)
 Configure dragging for drag and drop. More...
 
void unsetDraggable ()
 Disable drag & drop for this widget. More...
 
void setMouseOverDelay (int delay)
 Sets a delay for the mouse over event. More...
 
int mouseOverDelay () const
 Returns the mouse over signal delay. More...
 
virtual void setPopup (bool popup)
 Lets the widget overlay over other sibling widgets. More...
 
virtual void load ()
 Loads content just before the widget is used. More...
 
virtual bool isEnabled () const
 Returns whether the widget is enabled. More...
 
- Public Member Functions inherited from Wt::WWebWidget
 WWebWidget (WContainerWidget *parent=0)
 Construct a WebWidget with a given parent. More...
 
virtual void setPositionScheme (PositionScheme scheme)
 Sets the CSS position scheme. More...
 
virtual PositionScheme positionScheme () const
 Returns the CSS position scheme. More...
 
virtual void setOffsets (const WLength &offset, WFlags< Side > sides=All)
 Sets CSS offsets for a non-statically positioned widget. More...
 
virtual WLength offset (Side s) const
 Returns a CSS offset. More...
 
virtual WLength width () const
 Returns the width. More...
 
virtual WLength height () const
 Returns the height. More...
 
virtual void setMinimumSize (const WLength &width, const WLength &height)
 Sets a minimum size. More...
 
virtual WLength minimumWidth () const
 Returns the minimum width. More...
 
virtual WLength minimumHeight () const
 Returns the minimum height. More...
 
virtual void setMaximumSize (const WLength &width, const WLength &height)
 Sets a maximum size. More...
 
virtual WLength maximumWidth () const
 Returns the maximum width. More...
 
virtual WLength maximumHeight () const
 Returns the maximum height. More...
 
virtual void setLineHeight (const WLength &height)
 Sets the CSS line height for contained text.
 
virtual WLength lineHeight () const
 Returns the CSS line height for contained text. More...
 
virtual void setFloatSide (Side s)
 Specifies a CSS float side. More...
 
virtual Side floatSide () const
 Returns the CSS float side. More...
 
virtual void setClearSides (WFlags< Side > sides)
 Sets the sides that should be cleared of floats. More...
 
virtual WFlags< SideclearSides () const
 Returns the sides that should remain empty. More...
 
virtual void setMargin (const WLength &margin, WFlags< Side > sides=All)
 Sets CSS margins around the widget. More...
 
virtual WLength margin (Side side) const
 Returns a CSS margin set. More...
 
virtual void setHiddenKeepsGeometry (bool enabled)
 Sets whether the widget keeps its geometry when hidden. More...
 
virtual bool hiddenKeepsGeometry () const
 Returns whether the widget keeps its geometry when hidden. More...
 
virtual void setHidden (bool hidden, const WAnimation &animation=WAnimation())
 Hides or shows the widget. More...
 
virtual bool isHidden () const
 Returns whether the widget is set hidden. More...
 
virtual bool isVisible () const
 Returns whether the widget is visible. More...
 
virtual void setDisabled (bool disabled)
 Sets whether the widget is disabled. More...
 
virtual bool isDisabled () const
 Returns whether the widget is set disabled. More...
 
virtual bool isPopup () const
 Returns whether the widget is overlayed. More...
 
virtual void setInline (bool isInline)
 Sets whether the widget is displayed inline or as a block. More...
 
virtual bool isInline () const
 Returns whether the widget is displayed inline or as block. More...
 
virtual void setDecorationStyle (const WCssDecorationStyle &style)
 Sets a CSS decoration style. More...
 
virtual WCssDecorationStyledecorationStyle ()
 Returns the decoration style of this widget. More...
 
virtual void setStyleClass (const WString &styleClass)
 Sets (one or more) CSS style classes. More...
 
virtual WString styleClass () const
 Returns the CSS style class. More...
 
virtual void addStyleClass (const WString &styleClass, bool force=false)
 Adds a CSS style class. More...
 
virtual void removeStyleClass (const WString &styleClass, bool force=false)
 Removes a CSS style class. More...
 
virtual bool hasStyleClass (const WString &styleClass) const
 Returns whether the widget has a style class.
 
virtual void setVerticalAlignment (AlignmentFlag alignment, const WLength &length=WLength())
 Sets the vertical alignment. More...
 
virtual AlignmentFlag verticalAlignment () const
 Returns the vertical alignment. More...
 
virtual WLength verticalAlignmentLength () const
 Returns the fixed vertical alignment that was set. More...
 
virtual void setToolTip (const WString &text, TextFormat textFormat=PlainText)
 Sets a tooltip. More...
 
virtual void setDeferredToolTip (bool enable, TextFormat textFormat=PlainText)
 Enable deferred tooltip. More...
 
virtual WString toolTip () const
 Returns the tooltip.
 
virtual void refresh ()
 Refresh the widget. More...
 
virtual void setAttributeValue (const std::string &name, const WString &value)
 Sets an attribute value. More...
 
virtual WString attributeValue (const std::string &name) const
 Returns an attribute value. More...
 
virtual void setJavaScriptMember (const std::string &name, const std::string &value)
 Sets a JavaScript member. More...
 
virtual std::string javaScriptMember (const std::string &name) const
 Returns the value of a JavaScript member. More...
 
virtual void callJavaScriptMember (const std::string &name, const std::string &args)
 Calls a JavaScript member. More...
 
virtual bool loaded () const
 Returns whether this widget has been loaded. More...
 
virtual void setId (const std::string &id)
 Sets the CSS Id. More...
 
virtual WWidgetfind (const std::string &name)
 Finds a descendent widget by name. More...
 
virtual WWidgetfindById (const std::string &id)
 Finds a descendent widget by id.
 
virtual void setSelectable (bool selectable)
 Sets as selectable. More...
 
virtual void doJavaScript (const std::string &javascript)
 Executes the given JavaScript statements when the widget is rendered or updated. More...
 
virtual const std::string id () const
 Returns the (unique) identifier for this object. More...
 
void setLoadLaterWhenInvisible (bool)
 Change the way the widget is loaded when invisible. More...
 
std::string htmlTagName () const
 returns the current html tag name More...
 
void setHtmlTagName (const std::string &tag)
 set the custom HTML tag name More...
 
const std::vector< WWidget * > & children () const
 Returns contained widgets. More...
 
SignalchildrenChanged ()
 Signal emitted when children have been added or removed. More...
 
virtual void setCanReceiveFocus (bool enabled)
 Sets whether the widget can receive focus. More...
 
virtual bool canReceiveFocus () const
 Returns whether the widget can receive focus. More...
 
virtual bool setFirstFocus ()
 Set focus on the widget's first descendant. More...
 
virtual void setFocus (bool focus)
 Sets focus. More...
 
virtual bool hasFocus () const
 Returns whether the widget currently has the focus.
 
virtual void setTabIndex (int index)
 Sets the tab index. More...
 
virtual int tabIndex () const
 Returns the tab index. More...
 
EventSignalblurred ()
 Signal emitted when the widget lost focus. More...
 
EventSignalfocussed ()
 Signal emitted when the widget recieved focus. More...
 
virtual bool scrollVisibilityEnabled () const WT_CXX11ONLY(finaloverride)
 Returns whether scroll visibility detection is enabled for this widget. More...
 
virtual void setScrollVisibilityEnabled (bool enabled) WT_CXX11ONLY(finaloverride)
 Sets whether scroll visibility detection is enabled for this widget. More...
 
virtual int scrollVisibilityMargin () const WT_CXX11ONLY(finaloverride)
 Returns the margin around the viewport within which the widget is considered visible. More...
 
virtual void setScrollVisibilityMargin (int margin) WT_CXX11ONLY(finaloverride)
 Sets the margin around the viewport within which the widget is considered visible. More...
 
virtual Signal< bool > & scrollVisibilityChanged () WT_CXX11ONLY(finaloverride)
 Signal triggered when the scroll visibility of this widget changes. More...
 
virtual bool isScrollVisible () const WT_CXX11ONLY(finaloverride)
 Returns whether this widget is currently considered scroll visible. More...
 
virtual void setThemeStyleEnabled (bool enabled)
 Sets whether theme styling for a widget is enabled or disabled. More...
 
virtual bool isThemeStyleEnabled () const
 Returns whether this widget is currently styled by the chosen theme. More...
 
- Public Member Functions inherited from Wt::WWidget
virtual ~WWidget ()
 Destructor. More...
 
WWidgetparent () const
 Returns the parent widget. More...
 
virtual void removeChild (WObject *child)
 Removes a child object. More...
 
void setWidth (const WLength &width)
 Sets the width. More...
 
void setHeight (const WLength &height)
 Sets the height. More...
 
virtual void positionAt (const WWidget *widget, Orientation orientation=Vertical)
 Positions a widget next to another widget. More...
 
virtual void toggleStyleClass (const WString &styleClass, bool add, bool force=false)
 Toggles a CSS style class.
 
std::string jsRef () const
 Returns a JavaScript expression to the corresponding DOM node. More...
 
void setFocus ()
 Sets focus. More...
 
virtual void acceptDrops (const std::string &mimeType, const WString &hoverStyleClass=WString())
 Sets a mime type to be accepted for dropping. More...
 
virtual void stopAcceptDrops (const std::string &mimeType)
 Indicates that a mime type is no longer accepted for dropping. More...
 
virtual void setObjectName (const std::string &name)
 Sets an object name. More...
 
virtual void htmlText (std::ostream &out)
 Streams the (X)HTML representation. More...
 
bool isRendered () const
 Returns whether the widget is rendered. More...
 
void hide ()
 Hides the widget. More...
 
void animateHide (const WAnimation &animation)
 Hides the widget using an animation. More...
 
void show ()
 Shows the widget. More...
 
void animateShow (const WAnimation &animation)
 Shows the widget using an animation. More...
 
void enable ()
 Enables the widget. More...
 
void disable ()
 Disable thes widget. More...
 
bool layoutSizeAware () const
 Returns whether the widget is layout size aware. More...
 
- Public Member Functions inherited from Wt::WObject
 WObject (WObject *parent=0)
 Create a WObject with a given parent object. More...
 
virtual ~WObject ()
 Destructor. More...
 
virtual std::string objectName () const
 Returns the object name. More...
 
void resetLearnedSlots ()
 Resets learned stateless slot implementations. More...
 
template<class T >
void resetLearnedSlot (void(T::*method)())
 Resets a learned stateless slot implementation. More...
 
template<class T >
WStatelessSlot * implementStateless (void(T::*method)())
 Declares a slot to be stateless and learn client-side behaviour on first invocation. More...
 
template<class T >
WStatelessSlot * implementStateless (void(T::*method)(), void(T::*undoMethod)())
 Declares a slot to be stateless and learn client-side behaviour in advance. More...
 
void isNotStateless ()
 Marks the current function as not stateless. More...
 
template<class T >
WStatelessSlot * implementJavaScript (void(T::*method)(), const std::string &jsCode)
 Provides a JavaScript implementation for a method. More...
 
void addChild (WObject *child)
 Adds a child object. More...
 
const std::vector< WObject * > & children () const
 Returns the children.
 
WObjectparent () const
 Returns the parent object.
 

Protected Member Functions

void paintEvent (Wt::WPaintDevice *paintDevice)
 Paints the widget. More...
 
virtual void drawLabel (WPainter *painter, const WRectF &rect, WFlags< AlignmentFlag > alignmentFlags, const WString &text, int row) const
 drawLabel draw a label on the chart. Will be called by paint. More...
 
- Protected Member Functions inherited from Wt::WPaintedWidget
WJavaScriptHandle< WTransformcreateJSTransform ()
 Create a WTransform that is accessible from JavaScript, associated with this WPaintedWidget.
 
WJavaScriptHandle< WBrushcreateJSBrush ()
 Create a WBrush that is accessible from JavaScript, associated with this WPaintedWidget.
 
WJavaScriptHandle< WPencreateJSPen ()
 Create a WPen that is accessible from JavaScript, associated with this WPaintedWidget.
 
WJavaScriptHandle< WPainterPathcreateJSPainterPath ()
 Create a WPainterPath that is accessible from JavaScript, associated with this WPaintedWidget.
 
WJavaScriptHandle< WRectFcreateJSRect ()
 Create a WRectF that is accessible from JavaScript, associated with this WPaintedWidget.
 
WJavaScriptHandle< WPointFcreateJSPoint ()
 Create a WPointF that is accessible from JavaScript, associated with this WPaintedWidget.
 
virtual void layoutSizeChanged (int width, int height)
 Virtual method that indicates a size change. More...
 
virtual Method getMethod () const
 Returns the actual method used for rendering. More...
 
virtual WPaintDevicecreatePaintDevice () const
 Creates a paint device. More...
 
virtual void enableAjax ()
 Progresses to an Ajax-enabled widget. More...
 
virtual void render (WFlags< RenderFlag > flags)
 Renders the widget. More...
 
std::string objJsRef () const
 Returns a JavaScript reference to the client side representation of the WPaintedWidget. More...
 
- Protected Member Functions inherited from Wt::WInteractWidget
virtual void propagateSetEnabled (bool enabled)
 Propagates that a widget was enabled or disabled through children. More...
 
- Protected Member Functions inherited from Wt::WWebWidget
virtual WStatelessSlot * getStateless (Method method)
 On-demand stateless slot implementation. More...
 
- Protected Member Functions inherited from Wt::WWidget
void setLayoutSizeAware (bool sizeAware)
 Sets the widget to be aware of its size set by a layout manager. More...
 
 WWidget (WContainerWidget *parent=0)
 Creates a widget. More...
 
virtual void dropEvent (WDropEvent dropEvent)
 Handles a drop event. More...
 
virtual int boxPadding (Orientation orientation) const
 Returns the widget's built-in padding. More...
 
virtual int boxBorder (Orientation orientation) const
 Returns the widget's built-in border width. More...
 
void scheduleRender (WFlags< RepaintFlag > flags=0)
 Schedules rerendering of the widget. More...
 

Additional Inherited Members

- Public Types inherited from Wt::WPaintedWidget
- Public Types inherited from Wt::WObject
typedef void(WObject::* Method) ()
 Typedef for a WObject method without arguments.
 
- Static Public Member Functions inherited from Wt::WWebWidget
static WString escapeText (const WString &text, bool newlinesToo=false)
 Escape HTML control characters in the text, to display literally (deprecated). More...
 
static std::string & escapeText (std::string &text, bool newlinestoo=false)
 Escape HTML control characters in the text, to display literally (deprecated). More...
 
static bool removeScript (WString &text)
 Remove tags/attributes from text that are not passive (deprecated). More...
 
static std::string jsStringLiteral (const std::string &v, char delimiter= '\'')
 Turn a UTF8 encoded string into a JavaScript string literal. More...
 
- Static Public Member Functions inherited from Wt::WWidget
static WString tr (const char *key)
 Short hand for WString::tr() More...
 
- Static Protected Member Functions inherited from Wt::WObject
static WObjectsender ()
 Returns the sender of the current slot call. More...
 

Detailed Description

A pie chart.

A pie chart renders a single data series as segments of a circle, so that the area of each segment is proportional to the value in the data series.

To use a pie chart, you need to set a model using setModel(), and use setLabelsColumn() and setDataColumn() to specify the model column that contains the category labels and data.

The pie chart may be customized visually by enabling a 3D effect (setPerspectiveEnabled()), or by specifying the angle of the first segment. One or more segments may be exploded, which seperates the segment from the rest of the pie chart, using setExplode().

The segments may be labeled in various ways using setDisplayLabels().

CSS

Styling through CSS is not applicable.

ChartWPieChart-1.png
Example of a pie chart
See also
WCartesianChart

Member Function Documentation

void Wt::Chart::WPieChart::addDataPointArea ( int  row,
int  column,
WAbstractArea area 
) const
virtual

Adds a data point area (used for displaying e.g. tooltips).

You may want to specialize this is if you wish to modify (or delete) the area.

Note
Currently, an area is only created if the ToolTipRole data at the data point is not empty.
double Wt::Chart::WPieChart::avoidLabelRendering ( ) const

Returns the percentage to avoid label rendering.

See also
setAvoidLabelRendering(double)
WBrush Wt::Chart::WPieChart::brush ( int  modelRow) const

Returns the brush used for a pie segment.

See also
setBrush(int, const WBrush&)
WContainerWidget * Wt::Chart::WPieChart::createLabelWidget ( WWidget textWidget,
WPainter painter,
const WRectF rect,
Wt::WFlags< AlignmentFlag alignmentFlags 
) const
virtual

createLabelWidget possition textWidget where the text would be rendered. Assuming that textWidget is added to a container with same dimensions as the WPieChart. This should be used in combinaltion with drawLabel().

Returns
The new WContainerWidget that contains textWidget and can be placed on an other layer that has the same dimensions as the WPieChart.
See also
drawLabel()

Usage example, PieChart with label links.

class PChart : public Wt::Chart::WPieChart {
private:
Wt::WContainerWidget *widgetsLayer_;
public:
PChart(Wt::WContainerWidget *widgetsLayer) :
Wt::Chart::WPieChart(widgetsLayer),
widgetsLayer_(widgetsLayer)
{
widgetsLayer_->resize(800, 300);
resize(800, 300);
}
virtual void drawLabel(Wt::WPainter* painter, const Wt::WRectF& rect,
const Wt::WString& text, int row) const
{
if (model()->link(row, dataColumn()) == 0){
Wt::Chart::WPieChart::drawLabel(painter, rect, alignmentFlags,
text, row);
} else {
Wt::WAnchor *a = new Wt::WAnchor(*model()->link(row, dataColumn()),
text);
widgetsLayer_->addWidget(createLabelWidget(a, painter, rect,
alignmentFlags));
}
}
};
WWidget * Wt::Chart::WPieChart::createLegendItemWidget ( int  index,
WFlags< LabelOption options 
)

Creates a widget which renders the a legend item.

Depending on the passed LabelOption flags, the legend item widget, will contain a text (with or without the percentage) and/or a span with the segment's color.

int Wt::Chart::WPieChart::dataColumn ( ) const

Returns the model column used for the data.

See also
setDataColumn(int)
WFlags<LabelOption> Wt::Chart::WPieChart::displayLabels ( ) const

Returns options set for displaying labels.

See also
WPieChart::setDisplayLabels()
void Wt::Chart::WPieChart::drawLabel ( WPainter painter,
const WRectF rect,
WFlags< AlignmentFlag alignmentFlags,
const WString text,
int  row 
) const
protectedvirtual

drawLabel draw a label on the chart. Will be called by paint.

You may want to specialize this if you wish to replace the label by a widget.

See also
createLabelWidget() if you wish to replace the label by a Widget.
double Wt::Chart::WPieChart::explode ( int  modelRow) const

Returns the explosion factor for a segment.

See also
setExplode(int, double)
bool Wt::Chart::WPieChart::isPerspectiveEnabled ( ) const

Returns whether a 3D effect is enabled.

See also
setPerspectiveEnabled(bool, double)
bool Wt::Chart::WPieChart::isShadowEnabled ( ) const

Returns whether a shadow effect is enabled.

See also
setShadowEnabled()
WString Wt::Chart::WPieChart::labelFormat ( ) const

Returns the label format string.

See also
setLabelFormat()
int Wt::Chart::WPieChart::labelsColumn ( ) const

Returns the model column used for the labels.

See also
setLabelsColumn(int)
void Wt::Chart::WPieChart::paint ( WPainter painter,
const WRectF rectangle = WRectF() 
) const
virtual

Paint the chart in a rectangle of the given painter.

Paints the chart inside the painter, in the area indicated by rectangle. When rectangle is a null rectangle, the entire painter window is used.

Implements Wt::Chart::WAbstractChart.

void Wt::Chart::WPieChart::paintEvent ( Wt::WPaintDevice paintDevice)
protectedvirtual

Paints the widget.

You should reimplement this method to paint the contents of the widget, using the given paintDevice.

Implements Wt::WPaintedWidget.

void Wt::Chart::WPieChart::setAvoidLabelRendering ( double  percent)

Sets the percentage value to avoid rendering of label texts.

The default value is 0 percent.

void Wt::Chart::WPieChart::setBrush ( int  modelRow,
const WBrush brush 
)

Customizes the brush used for a pie segment.

By default, the brush is taken from the palette(). You can use this method to override the palette's brush for a particular modelRow.

See also
setPalette(WChartPalette *)
void Wt::Chart::WPieChart::setDataColumn ( int  modelColumn)

Sets the model column that holds the data.

The data column should contain data that can be converted to a number, but should not necessarily be of a number type, see also asNumber(const boost::any&).

The default value is -1 (not defined).

See also
setModel(WAbstractItemModel *), setLabelsColumn(int)
void Wt::Chart::WPieChart::setDisplayLabels ( WFlags< LabelOption options)

Configures if and how labels should be displayed.

The options must be the logical OR of a placement option (Inside or Outside) and TextLabel and/or TextPercentage. If both TextLabel and TextPercentage are specified, then these are combined as "<label>: <percentage>".

The default value is NoLabels.

void Wt::Chart::WPieChart::setExplode ( int  modelRow,
double  factor 
)

Sets the explosion factor for a pie segment.

Separates the segment corresponding to model row modelRow from the rest of the pie. The factor is a positive number that represents the distance from the center as a fraction of the pie radius. Thus, 0 corresponds to no separation, and 0.1 to a 10% separation, and 1 to a separation where the segment tip is on the outer perimeter of the pie.

The default value is 0.

void Wt::Chart::WPieChart::setLabelFormat ( const WString format)

Sets the label format.

Sets a format string which is used to format label (percentage) values.

The format string must be a format string that is accepted by snprintf() and which formats one double. If the format string is an empty string, then WLocale::toString() is used.

The default value is "%.3g%%".

See also
labelFormat()
void Wt::Chart::WPieChart::setLabelsColumn ( int  column)

Sets the model column that holds the labels.

The labels are used only when setDisplayLabels() is called with the TextLabel option.

The default value is -1 (not defined).

See also
setModel(WAbstractItemModel *), setDisplayLabels(), setDataColumn(int)
void Wt::Chart::WPieChart::setPerspectiveEnabled ( bool  enabled,
double  height = 1.0 
)

Enables a 3D perspective effect on the pie.

A 3D perspective effect is added, which may be customized by specifying the simulated height of the pie. The height is defined as a fraction of the pie radius.

The default value is false.

void Wt::Chart::WPieChart::setShadowEnabled ( bool  enabled)

Enables a shadow effect.

A soft shadow effect is added.

The default value is false.

void Wt::Chart::WPieChart::setStartAngle ( double  degrees)

Sets the angle of the first segment.

The default value is 45 degrees.

double Wt::Chart::WPieChart::startAngle ( ) const

Returns the angle of the first segment.

See also
setStartAngle(double)

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