C++ (Cpp) iterator::getControllerValue Examples

Example #1

File: MidiDevice.cpp Project: EQ4/RosegardenW

ControlParameter *
MidiDevice::getControlParameter(const std::string &type, Rosegarden::MidiByte controllerValue)
{
    ControlList::iterator it = m_controlList.begin();

    for (; it != m_controlList.end(); ++it)
    {
        if (it->getType() == type)
        {
            // Return matched on type for most events
            //
            if (type != Rosegarden::Controller::EventType) 
                return &*it;
            
            // Also match controller value for Controller events
            //
            if (it->getControllerValue() == controllerValue)
                return  &*it;
        }
    }

    return 0;
}

Example #2

File: MIDIInstrumentParameterPanel.cpp Project: tedfelix/rosegarden

void
MIDIInstrumentParameterPanel::setupControllers(MidiDevice *md)
{
    RG_DEBUG << "setupControllers()";

    if (!md)
        return;

    // To cut down on flicker, we avoid destroying and recreating
    // widgets as far as possible here.  If a label already exists,
    // we just set its text; if a rotary exists, we only replace it
    // if we actually need a different one.

    Composition &comp = m_doc->getComposition();

    ControlList list = md->getControlParameters();

    // Sort by IPB position.
    std::sort(list.begin(), list.end(),
              ControlParameter::ControlPositionCmp());

    int count = 0;
    RotaryInfoVector::iterator rotaryIter = m_rotaries.begin();

    // For each controller
    for (ControlList::iterator it = list.begin();
            it != list.end(); ++it) {
        if (it->getIPBPosition() == -1)
            continue;

        // Get the knob colour (even if it's default, because otherwise it turns
        // black instead of the default color from the map!  it was here the
        // whole time, this simple!)
        //
        const Colour c = comp.getGeneralColourMap().getColourByIndex(
                it->getColourIndex());
        const QColor knobColour = QColor(c.getRed(), c.getGreen(), c.getBlue());

        Rotary *rotary = 0;

        // If the Rotary widgets have already been created, update them.
        if (rotaryIter != m_rotaries.end()) {

            // Update the controller number that is associated with the
            // existing rotary widget.

            rotaryIter->controller = it->getControllerValue();

            // Update the properties of the existing rotary widget.

            rotary = rotaryIter->rotary;

            rotary->setMinimum(it->getMin());
            rotary->setMaximum(it->getMax());
            // If the default is 64, then this is most likely a "centered"
            // control which should show its distance from the 12 o'clock
            // position around the outside.
            rotary->setCentered((it->getDefault() == 64));
            rotary->setKnobColour(knobColour);

            // Update the controller name.
            rotaryIter->label->setText(QObject::tr(it->getName().c_str()));

            // Next Rotary widget
            ++rotaryIter;

        } else {  // Need to create the Rotary widget.

            // Create a horizontal box for the Rotary/Label pair.
            QWidget *hbox = new QWidget(m_rotaryFrame);
            QHBoxLayout *hboxLayout = new QHBoxLayout;
            hboxLayout->setSpacing(8);
            hboxLayout->setMargin(0);
            hbox->setLayout(hboxLayout);

            // Add a Rotary

            float pageStep = 5.0;
            if (it->getMax() - it->getMin() < 10)
                pageStep = 1.0;
            else if (it->getMax() - it->getMin() < 20)
                pageStep = 2.0;

            rotary = new Rotary(hbox,          // parent
                                it->getMin(),  // minimum
                                it->getMax(),  // maximum
                                1.0,           // step
                                pageStep,      // pageStep
                                it->getDefault(),  // initialPosition
                                20,                // size
                                Rotary::NoTicks,   // ticks
                                false,             // snapToTicks
                                (it->getDefault() == 64));  // centred, see setCentered() above
            rotary->setKnobColour(knobColour);
            hboxLayout->addWidget(rotary);

            // Add a label

            SqueezedLabel *label = new SqueezedLabel(QObject::tr(it->getName().c_str()), hbox);
            label->setFont(font());
            hboxLayout->addWidget(label);

            RG_DEBUG << "setupControllers(): Adding new widget at " << (count / 2) << "," << (count % 2);

            // Add the compound (Rotary and Label) widget to the grid.
            m_rotaryGrid->addWidget(hbox, count / 2, (count % 2) * 2, Qt::AlignLeft);
            hbox->show();

            // Add to the Rotary info list
            RotaryInfo ri;
            ri.rotary = rotary;
            ri.label = label;
            ri.controller = it->getControllerValue();
            m_rotaries.push_back(ri);

            // Connect for changes to the Rotary by the user.
            connect(rotary, SIGNAL(valueChanged(float)),
                    m_rotaryMapper, SLOT(map()));

            rotaryIter = m_rotaries.end();
        }

        // Add signal mapping
        //
        m_rotaryMapper->setMapping(rotary,
                                   int(it->getControllerValue()));

        ++count;
    }

    // If there are more rotary widgets than this instrument needs,
    // delete them.
    if (rotaryIter != m_rotaries.end()) {
        for (RotaryInfoVector::iterator it = rotaryIter; it != m_rotaries.end(); ++it) {
            // ??? Instead of deleting and recreating, we could hide the
            //     extras and bring them back when needed.
            delete it->rotary;
            delete it->label;
        }
        m_rotaries.resize(count);
    }
}