MainFrame()
: Dialog(L"ProgressBars")
, m_progressBar1(this)
, m_progressBar2(this, ProgressBar::Styles::Default +
ProgressBar::Styles::Smooth)
, m_progressBar3(this, ProgressBar::Styles::Default +
ProgressBar::Styles::Marquee)
, m_start(L"Start", this)
, m_close(L"Close", this)
{
// a box layout manager with vertical orientation and no-homogeneous
setLayout(new BoxLayout(Orientation::Vertical, false));
// set the ranges of the progress bars
m_progressBar1.setRange(0, 100);
m_progressBar2.setRange(0, 100);
m_progressBar3.setMarquee(0);
// the "Start" button is the default one
m_start.setDefault(true);
// call "onStart" when the "Start" button is pressed
m_start.Click.connect(Bind(&MainFrame::onStart, this));
// the Dialog::onCancel generates an onClose event
m_close.Click.connect(Bind(&MainFrame::onCancel, this));
// the application is waiting to work (the user should press the
// "Start" button)
m_state = WaitingToWork;
// set the size of the Frame
setSize(Size(256, getPreferredSize().h));
center();
}
// when the "Start/Pause/Continue/Restart" button is pressed...
void onStart()
{
switch (m_state) {
// The user pressed Start/Continue...
case WaitingToWork:
case Paused: {
m_state = Working;
m_start.setText(L"Pause"); // convert the button to "Pause"...
m_progressBar3.setMarquee(100);
// this is "The Loop", where the real work is done
do {
// when we pump the message queue, we can get events like onClose()
CurrentThread::pumpMessageQueue();
// work done
if (m_progressBar1.getValue() == m_progressBar1.getMaximum()) {
m_state = WorkDone;
m_start.setText(L"Restart"); // convert the button to "Restart"
}
else {
m_progressBar1.addValue(1);
m_progressBar2.addValue(1);
// in our case, the "real work" is sleep :) ...but for
// your application this could be "loading a file"...
Sleep(100);
}
// still working?
} while (m_state == Working);
// aborting work? hide the frame...
if (m_state == Aborting)
setVisible(false);
m_progressBar3.setMarquee(0);
break;
}
// The user pressed Pause...
case Working:
m_state = Paused;
m_start.setText(L"Continue"); // convert the button to "Continue"
break;
// The user pressed Restart...
case WorkDone:
// restart progress bars
m_progressBar1.setValue(m_progressBar1.getMinimum());
m_progressBar2.setValue(m_progressBar2.getMinimum());
m_progressBar3.setMarquee(0);
m_start.setText(L"Start"); // convert the button to "Start"
m_state = WaitingToWork;
break;
case Aborting:
assert(false); // impossible
break;
}
}
