CountDownWidget Class Reference
[Timer example]

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

#include <CountDownWidget.h>

Inheritance diagram for CountDownWidget:

[legend]

List of all members.

Public Slots
void	cancel ()
	Cancel the count down.
Public Member Functions
	CountDownWidget (int start, int stop, unsigned msec, WContainerWidget *parent=0)
	Create a new CountDownWidget.
Public Attributes
Wt::Signal< void >	done
	Signal emitted when the countdown reached stop.
Private Slots
void	timerTick ()
	Process one timer tick.
Private Attributes
int	start_
int	stop_
unsigned	msec_
int	current_
WTimer *	timer_

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Detailed Description

A widget which displays a decrementing number.

Definition at line 25 of file CountDownWidget.h.

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Constructor & Destructor Documentation

CountDownWidget::CountDownWidget	(	int	start,
		int	stop,
		unsigned	msec,
		WContainerWidget *	parent = 0
	)

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.

  : WText(parent),
    start_(start),
    stop_(stop)
{
  stop_ = std::min(start_ - 1, stop_);  // stop must be smaller than start
  current_ = start_;

  timer_ = new WTimer(this);
  timer_->setInterval(msec);
  timer_->timeout.connect(SLOT(this, CountDownWidget::timerTick));
  timer_->start();

  setText(boost::lexical_cast<std::wstring>(current_));
}

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Member Function Documentation

void CountDownWidget::cancel

(

)

[slot]

Cancel the count down.

Definition at line 29 of file CountDownWidget.C.

{
  timer_->stop();
}

void CountDownWidget::timerTick

(

)

[private, slot]

Process one timer tick.

Definition at line 34 of file CountDownWidget.C.

{
  setText(boost::lexical_cast<std::wstring>(--current_));

  if (current_ <= stop_) {
    timer_->stop();
    done.emit();
  }
}

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Member Data Documentation

Wt::Signal<void> CountDownWidget::done

Signal emitted when the countdown reached stop.

Definition at line 38 of file CountDownWidget.h.

int CountDownWidget::start_ [private]

Definition at line 51 of file CountDownWidget.h.

int CountDownWidget::stop_ [private]

Definition at line 52 of file CountDownWidget.h.

unsigned CountDownWidget::msec_ [private]

Definition at line 53 of file CountDownWidget.h.

int CountDownWidget::current_ [private]

Definition at line 55 of file CountDownWidget.h.

WTimer* CountDownWidget::timer_ [private]

Definition at line 57 of file CountDownWidget.h.

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

• /home/koen/project/wt/cvs/wt/examples/mission/CountDownWidget.h
• /home/koen/project/wt/cvs/wt/examples/mission/CountDownWidget.C