Wt examples  4.12.2
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Public Member Functions | List of all members
PieExample Class Reference

A Widget that demonstrates a Pie chart. More...

#include <ChartsExample.h>

Inheritance diagram for PieExample:
[legend]

Public Member Functions

 PieExample ()
 Creates the pie chart example.
 
- Public Member Functions inherited from Wt::WContainerWidget
 WContainerWidget ()
 
 ~WContainerWidget ()
 
void setLayout (std::unique_ptr< WLayout > layout)
 
Layout * setLayout (std::unique_ptr< Layout > layout)
 
WLayout * layout () const
 
virtual void addWidget (std::unique_ptr< WWidget > widget)
 
Widget * addWidget (std::unique_ptr< Widget > widget)
 
Widget * addNew (Args &&...args)
 
virtual void insertBefore (std::unique_ptr< WWidget > widget, WWidget *before)
 
Widget * insertBefore (std::unique_ptr< Widget > widget, WWidget *before)
 
virtual void insertWidget (int index, std::unique_ptr< WWidget > widget)
 
Widget * insertWidget (int index, std::unique_ptr< Widget > widget)
 
Widget * insertNew (int index, Args &&...args)
 
virtual std::unique_ptr< WWidget > removeWidget (WWidget *widget) override
 
virtual void clear ()
 
virtual int indexOf (WWidget *widget) const
 
virtual WWidget * widget (int index) const
 
virtual int count () const
 
void setContentAlignment (WFlags< AlignmentFlag > contentAlignment)
 
void setPadding (const WLength &padding, WFlags< Side > sides=AllSides)
 
WLength padding (Side side) const
 
WFlags< AlignmentFlag > contentAlignment () const
 
void setOverflow (Overflow overflow, WFlags< Orientation > orientation=(Orientation::Horizontal|Orientation::Vertical))
 
void setList (bool list, bool ordered=false)
 
bool isList () const
 
bool isUnorderedList () const
 
bool isOrderedList () const
 
EventSignal< WScrollEvent > & scrolled ()
 
int scrollTop () const
 
int scrollLeft () const
 
virtual std::unique_ptr< WWidget > removeWidget (WWidget *widget)
 
std::unique_ptr< Widget > removeWidget (Widget *widget)
 
- Public Member Functions inherited from Wt::WInteractWidget
 WInteractWidget ()
 
EventSignal< WKeyEvent > & keyWentDown ()
 
EventSignal< WKeyEvent > & keyPressed ()
 
EventSignal< WKeyEvent > & keyWentUp ()
 
EventSignal & enterPressed ()
 
EventSignal & escapePressed ()
 
EventSignal< WMouseEvent > & clicked ()
 
EventSignal< WMouseEvent > & doubleClicked ()
 
EventSignal< WMouseEvent > & mouseWentDown ()
 
EventSignal< WMouseEvent > & mouseWentUp ()
 
EventSignal< WMouseEvent > & mouseWentOut ()
 
EventSignal< WMouseEvent > & mouseWentOver ()
 
EventSignal< WMouseEvent > & mouseMoved ()
 
EventSignal< WMouseEvent > & mouseDragged ()
 
EventSignal< WMouseEvent > & mouseWheel ()
 
EventSignal< WTouchEvent > & touchStarted ()
 
EventSignal< WTouchEvent > & touchEnded ()
 
EventSignal< WTouchEvent > & touchMoved ()
 
EventSignal< WGestureEvent > & gestureStarted ()
 
EventSignal< WGestureEvent > & gestureChanged ()
 
EventSignal< WGestureEvent > & gestureEnded ()
 
void setDraggable (const std::string &mimeType, WWidget *dragWidget=nullptr, bool isDragWidgetOnly=false, WObject *sourceWidget=nullptr)
 
void unsetDraggable ()
 
void setMouseOverDelay (int delay)
 
int mouseOverDelay () const
 
virtual void setPopup (bool popup) override
 
virtual void load () override
 
virtual bool isEnabled () const override
 
- Public Member Functions inherited from Wt::WWebWidget
 WWebWidget ()
 
virtual std::vector< WWidget * > children () const override
 
Signal & childrenChanged ()
 
virtual void setPositionScheme (PositionScheme scheme) override
 
virtual PositionScheme positionScheme () const override
 
virtual void setOffsets (const WLength &offset, WFlags< Side > sides=AllSides) override
 
virtual WLength offset (Side s) const override
 
virtual void resize (const WLength &width, const WLength &height) override
 
virtual WLength width () const override
 
virtual WLength height () const override
 
virtual void setMinimumSize (const WLength &width, const WLength &height) override
 
virtual WLength minimumWidth () const override
 
virtual WLength minimumHeight () const override
 
virtual void setMaximumSize (const WLength &width, const WLength &height) override
 
virtual WLength maximumWidth () const override
 
virtual WLength maximumHeight () const override
 
virtual void setLineHeight (const WLength &height) override
 
virtual WLength lineHeight () const override
 
virtual void setFloatSide (Side s) override
 
virtual Side floatSide () const override
 
virtual void setClearSides (WFlags< Side > sides) override
 
virtual WFlags< Side > clearSides () const override
 
virtual void setMargin (const WLength &margin, WFlags< Side > sides=AllSides) override
 
virtual WLength margin (Side side) const override
 
virtual void setHiddenKeepsGeometry (bool enabled) override
 
virtual bool hiddenKeepsGeometry () const override
 
virtual void setHidden (bool hidden, const WAnimation &animation=WAnimation()) override
 
virtual bool isHidden () const override
 
virtual bool isVisible () const override
 
virtual void setDisabled (bool disabled) override
 
virtual bool isDisabled () const override
 
virtual bool isPopup () const override
 
virtual void setInline (bool isInline) override
 
virtual bool isInline () const override
 
virtual void setDecorationStyle (const WCssDecorationStyle &style) override
 
virtual WCssDecorationStyle & decorationStyle () override
 
virtual void setStyleClass (const WString &styleClass) override
 
virtual WString styleClass () const override
 
virtual void addStyleClass (const WString &styleClass, bool force=false) override
 
virtual void removeStyleClass (const WString &styleClass, bool force=false) override
 
virtual bool hasStyleClass (const WString &styleClass) const override
 
virtual void setVerticalAlignment (AlignmentFlag alignment, const WLength &length=WLength()) override
 
virtual AlignmentFlag verticalAlignment () const override
 
virtual WLength verticalAlignmentLength () const override
 
virtual void setToolTip (const WString &text, TextFormat textFormat=TextFormat::Plain) override
 
virtual void setDeferredToolTip (bool enable, TextFormat textFormat=TextFormat::Plain) override
 
virtual WString toolTip () const override
 
void showToolTipOnHover (bool enable)
 
void showToolTip ()
 
void hideToolTip ()
 
virtual void refresh () override
 
virtual void setAttributeValue (const std::string &name, const WString &value) override
 
virtual WString attributeValue (const std::string &name) const override
 
virtual void setJavaScriptMember (const std::string &name, const std::string &value) override
 
virtual std::string javaScriptMember (const std::string &name) const override
 
virtual void callJavaScriptMember (const std::string &name, const std::string &args) override
 
virtual bool loaded () const override
 
virtual void setId (const std::string &id) override
 
virtual WWidget * find (const std::string &name) override
 
virtual WWidget * findById (const std::string &id) override
 
virtual void setSelectable (bool selectable) override
 
virtual void doJavaScript (const std::string &javascript) override
 
virtual const std::string id () const override
 
void setLoadLaterWhenInvisible (bool)
 
std::string htmlTagName () const
 
void setHtmlTagName (const std::string &tag)
 
virtual void setCanReceiveFocus (bool enabled) override
 
virtual bool canReceiveFocus () const override
 
virtual bool setFirstFocus () override
 
virtual void setFocus (bool focus) override
 
virtual bool hasFocus () const override
 
virtual void setTabIndex (int index) override
 
virtual int tabIndex () const override
 
EventSignal & blurred ()
 
EventSignal & focussed ()
 
virtual bool scrollVisibilityEnabled () const final override
 
virtual void setScrollVisibilityEnabled (bool enabled) final override
 
virtual int scrollVisibilityMargin () const final override
 
virtual void setScrollVisibilityMargin (int margin) final override
 
virtual Signal< bool > & scrollVisibilityChanged () final override
 
virtual bool isScrollVisible () const final override
 
virtual void setThemeStyleEnabled (bool enabled) final override
 
virtual bool isThemeStyleEnabled () const final override
 
virtual void setObjectName (const std::string &name) override
 
void setFocus ()
 
virtual void setFocus (bool focus)=0
 
- Public Member Functions inherited from Wt::WWidget
virtual ~WWidget ()
 
WWidget * parent () const
 
std::unique_ptr< Widget > removeWidget (Widget *widget)
 
std::unique_ptr< WWidget > removeFromParent ()
 
void setWidth (const WLength &width)
 
void setHeight (const WLength &height)
 
virtual void positionAt (const WWidget *widget, Orientation orientation=Orientation::Vertical, WFlags< Orientation > adjustOrientations=AllOrientations)
 
virtual void toggleStyleClass (const WString &styleClass, bool add, bool force=false)
 
std::string jsRef () const
 
void setFocus ()
 
virtual void acceptDrops (const std::string &mimeType, const WString &hoverStyleClass=WString())
 
virtual void stopAcceptDrops (const std::string &mimeType)
 
virtual void htmlText (std::ostream &out)
 
bool isRendered () const
 
void hide ()
 
void animateHide (const WAnimation &animation)
 
void show ()
 
void animateShow (const WAnimation &animation)
 
void enable ()
 
void disable ()
 
bool layoutSizeAware () const
 
virtual void scheduleThemeStyleApply (std::shared_ptr< Wt::WTheme > theme, WWidget *child, int role)
 
virtual void applyThemeStyles ()
 
- Public Member Functions inherited from Wt::WObject
void addChild (std::unique_ptr< WObject > child)
 
Child * addChild (std::unique_ptr< Child > child)
 
std::unique_ptr< WObject > removeChild (WObject *child)
 
std::unique_ptr< Child > removeChild (Child *child)
 
virtual std::string objectName () const
 
void resetLearnedSlots ()
 
void resetLearnedSlot (void(T::*method)())
 
WStatelessSlot * implementStateless (void(T::*method)())
 
WStatelessSlot * implementStateless (void(T::*method)(), void(T::*undoMethod)())
 
void isNotStateless ()
 
WStatelessSlot * implementJavaScript (void(T::*method)(), const std::string &jsCode)
 
- Public Member Functions inherited from Wt::Core::observable
 observable () noexcept
 
virtual ~observable ()
 
auto bindSafe (void(C::*method)(Args...)) noexcept
 
auto bindSafe (void(C::*method)(Args...) const) const noexcept
 
auto bindSafe (const Function &function) noexcept
 

Additional Inherited Members

- Public Types inherited from Wt::WObject
typedef void(WObject::* Method) ()
 
- Static Public Member Functions inherited from Wt::WWebWidget
static std::string jsStringLiteral (const std::string &v, char delimiter='\'')
 
- Static Public Member Functions inherited from Wt::WWidget
static WString tr (const char *key)
 
- Static Public Attributes inherited from Wt::WInteractWidget
static const std::string noDefault
 
- Protected Member Functions inherited from Wt::WInteractWidget
void render (WFlags< RenderFlag > flags) override
 
virtual void propagateSetEnabled (bool enabled) override
 
- Protected Member Functions inherited from Wt::WWebWidget
virtual void enableAjax () override
 
virtual WStatelessSlot * getStateless (Method method) override
 
- Protected Member Functions inherited from Wt::WWidget
void setLayoutSizeAware (bool sizeAware)
 
virtual void layoutSizeChanged (int width, int height)
 
 WWidget ()
 
virtual void dropEvent (WDropEvent dropEvent)
 
virtual int boxPadding (Orientation orientation) const
 
virtual int boxBorder (Orientation orientation) const
 
void scheduleRender (WFlags< RepaintFlag > flags=None)
 

Detailed Description

A Widget that demonstrates a Pie chart.

Definition at line 59 of file ChartsExample.h.

Constructor & Destructor Documentation

◆ PieExample()

PieExample::PieExample ( )

Creates the pie chart example.

Definition at line 352 of file ChartsExample.C.

352 :
353 WContainerWidget()
354{
355 this->addWidget(std::make_unique<WText>(WString::tr("pie chart")));
356
357 std::shared_ptr<WStandardItemModel> model
358 = std::make_shared<WStandardItemModel>();
359 std::unique_ptr<NumericItem> prototype
360 = std::make_unique<NumericItem>();
361 model->setItemPrototype(std::move(prototype));
362
363 //headers
364 model->insertColumns(model->columnCount(), 2);
365 model->setHeaderData(0, WString("Item"));
366 model->setHeaderData(1, WString("Sales"));
367
368 //data
369 model->insertRows(model->rowCount(), 6);
370 int row = 0;
371 model->setData(row, 0, WString("Blueberry"));
372 model->setData(row, 1, 120);
373 // model->setData(row, 1, WString("Blueberry"), ToolTipRole);
374 row++;
375 model->setData(row, 0, WString("Cherry"));
376 model->setData(row, 1, 30);
377 row++;
378 model->setData(row, 0, WString("Apple"));
379 model->setData(row, 1, 260);
380 row++;
381 model->setData(row, 0, WString("Boston Cream"));
382 model->setData(row, 1, 160);
383 row++;
384 model->setData(row, 0, WString("Other"));
385 model->setData(row, 1, 40);
386 row++;
387 model->setData(row, 0, WString("Vanilla Cream"));
388 model->setData(row, 1, 120);
389 row++;
390
391 //set all items to be editable and selectable
392 for (int row = 0; row < model->rowCount(); ++row)
393 for (int col = 0; col < model->columnCount(); ++col)
394 model->item(row, col)->setFlags(ItemFlag::Selectable | ItemFlag::Editable);
395
396 WContainerWidget *w = this->addWidget(std::make_unique<WContainerWidget>());
397 WTableView* table = w->addWidget(std::make_unique<WTableView>());
398
399 table->setMargin(10, Side::Top | Side::Bottom);
400 table->setMargin(WLength::Auto, Side::Left | Side::Right);
401 table->setSortingEnabled(true);
402 table->setModel(model);
403 table->setColumnWidth(1, 100);
404 table->setRowHeight(22);
405
406 if (WApplication::instance()->environment().ajax()) {
407 table->resize(150 + 100 + 14, 20 + 6 * 22);
408 table->setEditTriggers(EditTrigger::SingleClicked);
409 } else {
410 table->resize(150 + 100 + 14, WLength::Auto);
411 table->setEditTriggers(EditTrigger::None);
412 }
413
414 /*
415 * Create the pie chart.
416 */
417 WPieChart *chart = this->addWidget(std::make_unique<WPieChart>());
418 chart->setModel(model); // set the model
419 chart->setLabelsColumn(0); // set the column that holds the labels
420 chart->setDataColumn(1); // set the column that holds the data
421
422 // configure location and type of labels
423 chart->setDisplayLabels(LabelOption::Outside | LabelOption::TextLabel | LabelOption::TextPercentage);
424
425 // enable a 3D and shadow effect
426 chart->setPerspectiveEnabled(true, 0.2);
427 chart->setShadowEnabled(true);
428
429 // explode the first item
430 chart->setExplode(0, 0.3);
431
432 chart->resize(800, 300); // WPaintedWidget must be given an explicit size
433
434 chart->setMargin(10, Side::Top | Side::Bottom); // add margin vertically
435 chart->setMargin(WLength::Auto, Side::Left | Side::Right); // center horizontally
436}
Wt::Chart::WAbstractChart::setModel
void setModel(const std::shared_ptr< WAbstractItemModel > &model)
Wt::Chart::WPieChart::setDataColumn
void setDataColumn(int modelColumn)
Wt::Chart::WPieChart::setExplode
void setExplode(int modelRow, double factor)
Wt::Chart::WPieChart::setShadowEnabled
void setShadowEnabled(bool enabled)
Wt::Chart::WPieChart::setDisplayLabels
void setDisplayLabels(WFlags< LabelOption > options)
Wt::Chart::WPieChart::setLabelsColumn
void setLabelsColumn(int column)
Wt::Chart::WPieChart::setPerspectiveEnabled
void setPerspectiveEnabled(bool enabled, double height=1.0)
Wt::WAbstractItemView::setEditTriggers
void setEditTriggers(WFlags< EditTrigger > editTriggers)
Wt::WAbstractItemView::setSortingEnabled
void setSortingEnabled(bool enabled)
Wt::WCompositeWidget::setMargin
virtual void setMargin(const WLength &margin, WFlags< Side > sides=AllSides) override
Wt::WContainerWidget::addWidget
virtual void addWidget(std::unique_ptr< WWidget > widget)
Wt::WLength::Auto
static WLength Auto
Wt::WPaintedWidget::resize
virtual void resize(const WLength &width, const WLength &height) override
Wt::WString::tr
static WString tr(const char *key)
Wt::WTableView::setColumnWidth
virtual void setColumnWidth(int column, const WLength &width) override
Wt::WTableView::resize
virtual void resize(const WLength &width, const WLength &height) override
Wt::WTableView::setModel
virtual void setModel(const std::shared_ptr< WAbstractItemModel > &model) override
Wt::WTableView::setRowHeight
virtual void setRowHeight(const WLength &rowHeight) override
Wt::WWebWidget::setMargin
virtual void setMargin(const WLength &margin, WFlags< Side > sides=AllSides) override
The documentation for this class was generated from the following files:
Generated on Tue Jan 27 2026 for the C++ Web Toolkit (Wt) by  doxygen 1.9.8