TimeSeriesExample Class Reference

A widget that demonstrates a times series chart. More...

#include <ChartsExample.h>

Inheritance diagram for TimeSeriesExample:

Public Member Functions
	TimeSeriesExample ()
	Creates the time series scatter plot 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 times series chart.

Definition at line 29 of file ChartsExample.h.

Constructor & Destructor Documentation

TimeSeriesExample()

TimeSeriesExample::TimeSeriesExample

(

)

Creates the time series scatter plot example.

Definition at line 198 of file ChartsExample.C.

                                    :
  WContainerWidget()
{
  this->addWidget(std::make_unique<WText>(WString::tr("scatter plot")));
 
  std::shared_ptr<WAbstractItemModel> model
      = readCsvFile(WApplication::appRoot() + "timeseries.csv", this);
 
  if (!model)
    return;
 
  /*
   * Parses the first column as dates, to be able to use a date scale
   */
  for (int i = 0; i < model->rowCount(); ++i) {
    WString s = asString(model->data(i, 0));
    WDate d = WDate::fromString(s, "dd/MM/yy");
    model->setData(i, 0, d);
  }
 
  // Show a view that allows editing of the model.
  auto *w = this->addWidget(std::make_unique<WContainerWidget>());
  auto *table = w->addWidget(std::make_unique<WTableView>());
 
  table->setMargin(10, Side::Top | Side::Bottom);
  table->setMargin(WLength::Auto, Side::Left | Side::Right);
 
  table->setModel(model);
  table->setSortingEnabled(false); // Does not make much sense for time series
  table->setColumnResizeEnabled(true);
  table->setSelectionMode(SelectionMode::None);
  table->setAlternatingRowColors(true);
  table->setColumnAlignment(0, AlignmentFlag::Center);
  table->setHeaderAlignment(0, AlignmentFlag::Center);
  table->setRowHeight(22);
 
  // Editing does not really work without Ajax, it would require an
  // additional button somewhere to confirm the edited value.
  if (WApplication::instance()->environment().ajax()) {
    table->resize(800, 20 + 5*22);
    table->setEditTriggers(EditTrigger::SingleClicked);
  } else {
    table->resize(800, 20 + 5*22 + 25);
    table->setEditTriggers(EditTrigger::None);
  }
 
  std::shared_ptr<WItemDelegate> delegate
      = std::make_shared<WItemDelegate>();
  delegate->setTextFormat("%.1f");
  table->setItemDelegate(delegate);
 
  std::shared_ptr<WItemDelegate> delegateColumn
      = std::make_shared<WItemDelegate>();
  table->setItemDelegateForColumn(0, delegateColumn);
 
  table->setColumnWidth(0, 80);
  for (int i = 1; i < model->columnCount(); ++i)
    table->setColumnWidth(i, 90);
 
  /*
   * Create the scatter plot.
   */
  WCartesianChart *chart = this->addWidget(std::make_unique<WCartesianChart>());
  //chart->setPreferredMethod(WPaintedWidget::PngImage);
  //chart->setBackground(gray);
  chart->setModel(model);        // set the model
  chart->setXSeriesColumn(0);    // set the column that holds the X data
  chart->setLegendEnabled(true); // enable the legend
  chart->setZoomEnabled(true);
  chart->setPanEnabled(true);
 
  chart->setType(ChartType::Scatter);            // set type to ScatterPlot
  chart->axis(Axis::X).setScale(AxisScale::Date); // set scale of X axis to DateScale
 
  // Automatically layout chart (space for axes, legend, ...)
  chart->setAutoLayoutEnabled();
 
  chart->setBackground(WColor(200,200,200));
 /*
   * Add first two columns as line series
   */
  for (int i = 1; i < 3; ++i) {
    std::unique_ptr<WDataSeries> s
        = std::make_unique<WDataSeries>(i, SeriesType::Line);
    s->setShadow(WShadow(3, 3, WColor(0, 0, 0, 127), 3));
    chart->addSeries(std::move(s));
  }
 
  chart->resize(800, 400); // WPaintedWidget must be given explicit size
 
  chart->setMargin(10, Side::Top | Side::Bottom);            // add margin vertically
  chart->setMargin(WLength::Auto, Side::Left | Side::Right); // center horizontally
 
  this->addWidget(std::make_unique<ChartConfig>(chart));
}

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The documentation for this class was generated from the following files:

• charts/ChartsExample.h
• charts/ChartsExample.C