Wt examples  4.15.0
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Public Member Functions | Private Member Functions | Private Attributes | List of all members
CountDownWidget Class Reference

A widget which displays a decrementing number. More...

#include <CountDownWidget.h>

Inheritance diagram for CountDownWidget:
[legend]

Public Member Functions

 CountDownWidget (int start, int stop, std::chrono::milliseconds msec)
 Create a new CountDownWidget.
Signal & done ()
 Signal emitted when the countdown reached stop.
void cancel ()
 Cancel the count down.
Public Member Functions inherited from Wt::WText
 WText ()
 WText (const WString &text)
 WText (const WString &text, TextFormat textFormat)
 ~WText ()
const WString & text () const
bool setText (const WString &text)
bool setTextFormat (TextFormat format)
TextFormat textFormat () const
void setWordWrap (bool wordWrap)
bool wordWrap () const
void setTextAlignment (AlignmentFlag textAlignment)
AlignmentFlag textAlignment () const
void setPadding (const WLength &padding, WFlags< Side > sides=Side::Left|Side::Right)
WLength padding (Side side) const
void setInternalPathEncoding (bool enabled)
bool hasInternalPathEncoding () const
virtual void refresh () override
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
void anchorAt (WWidget *widget, Orientation orientation=Orientation::Vertical) 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
std::string positionAnchorName () const override
void becomePositionAnchor () override
void setPositionAnchor (const std::string &anchorName) override
void setPositionAnchor (WWidget *anchor) override
std::string positionAnchor () 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 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)
bool resendFormData () override
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 ()
Public Member Functions inherited from Wt::WWidget
virtual ~WWidget ()
WWidget * parent () const
virtual std::unique_ptr< WWidget > removeWidget (WWidget *widget)
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)
bool isPositionAnchor () const
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)
virtual void htmlText (std::ostream &out, WStringStream &js)
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

Private Member Functions

void timerTick ()
 Process one timer tick.

Private Attributes

Signal done_
int start_
int stop_
int current_
std::unique_ptr< WTimer > timer_

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 void setDefaultNativeControl (bool enabled)
static bool defaultNativeControl ()
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::WText
virtual void render (WFlags< RenderFlag > flags) override
Protected Member Functions inherited from Wt::WInteractWidget
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 which displays a decrementing number.

Definition at line 26 of file CountDownWidget.h.

Constructor & Destructor Documentation

◆ CountDownWidget()

CountDownWidget::CountDownWidget ( int start,
int stop,
std::chrono::milliseconds msec )

Create a new CountDownWidget.

The widget will count down from start to stop, decrementing the number every msec milliseconds.

Definition at line 12 of file CountDownWidget.C.

13 : WText(),
14 done_(),
15 start_(start),
16 stop_(stop)
17{
18 stop_ = std::min(start_ - 1, stop_); // stop must be smaller than start
19 current_ = start_;
20
21 timer_ = std::make_unique<WTimer>();
22 timer_->setInterval(msec);
23 timer_->timeout().connect(this, &CountDownWidget::timerTick);
24 timer_->start();
25
26 setText(std::to_string(current_));
27}
CountDownWidget::timer_
std::unique_ptr< WTimer > timer_
Definition CountDownWidget.h:51
CountDownWidget::timerTick
void timerTick()
Process one timer tick.
Definition CountDownWidget.C:34
Wt::WText::setText
bool setText(const WString &text)

Member Function Documentation

◆ cancel()

void CountDownWidget::cancel ( )

Cancel the count down.

Definition at line 29 of file CountDownWidget.C.

30{
31 timer_->stop();
32}

◆ done()

Signal & CountDownWidget::done ( )
inline

Signal emitted when the countdown reached stop.

Definition at line 38 of file CountDownWidget.h.

38{ return done_; }

◆ timerTick()

void CountDownWidget::timerTick ( )
private

Process one timer tick.

Definition at line 34 of file CountDownWidget.C.

35{
36 setText(std::to_string(--current_));
37
38 if (current_ <= stop_) {
39 timer_->stop();
40 done_.emit();
41 }
42}

Member Data Documentation

◆ current_

int CountDownWidget::current_
private

Definition at line 49 of file CountDownWidget.h.

◆ done_

Signal CountDownWidget::done_
private

Definition at line 45 of file CountDownWidget.h.

◆ start_

int CountDownWidget::start_
private

Definition at line 46 of file CountDownWidget.h.

◆ stop_

int CountDownWidget::stop_
private

Definition at line 47 of file CountDownWidget.h.

◆ timer_

std::unique_ptr<WTimer> CountDownWidget::timer_
private

Definition at line 51 of file CountDownWidget.h.

The documentation for this class was generated from the following files:
Generated on for the C++ Web Toolkit (Wt) by  doxygen 1.15.0