C++ EventSelection类代码示例

EventSelection *
SymbolInsertionCommand::getSubsequentSelection()
{
    EventSelection *selection = new EventSelection(getSegment());
    selection->addEvent(getLastInsertedEvent());
    return selection;
}

// Select exactly the beat-defining events, including any extra notes
// this command inserted.
// @author Tom Breton (Tehom)
EventSelection *
SelectAddEvenNotesCommand::getSubsequentSelection()
{
    RG_DEBUG << "SelectAddEvenNotesCommand::getSubsequentSelection" << endl;
    EventSelection *selection = new EventSelection(getSegment());

    RG_DEBUG << (int)m_beatEventVector.size()
             << "elements in m_beatEventVector"
             << endl;
    // Add the beat events we found to the selection
    for (BeatEventVector::iterator i = m_beatEventVector.begin();
         i != m_beatEventVector.end();
         ++i) {
        BeatEvent &beatEvent = *i;
        // Skip ties
        selection->addEvent(beatEvent.m_event, false);
    }

    // Also add any events that we made.
    RG_DEBUG << (int)m_eventsAdded.size()
             << "elements in redoEvents"
             << endl;
    for (EventVector::const_iterator i = m_eventsAdded.begin();
         i != m_eventsAdded.end();
         ++i) {
        Event *e = *i;
        // Skip ties
        selection->addEvent(e, false);
    }
    return selection;
}

MatrixResizer::FollowMode
MatrixResizer::handleMouseMove(const MatrixMouseEvent *e)
{
    if (!e) return NoFollow;

    setBasicContextHelp();

    if (!m_currentElement || !m_currentViewSegment) return NoFollow;

    if (getSnapGrid()->getSnapSetting() != SnapGrid::NoSnap) {
        setContextHelp(tr("Hold Shift to avoid snapping to beat grid"));
    } else {
        clearContextHelp();
    }

    // snap in the closest direction
    timeT snapTime = e->snappedLeftTime;
    if (e->snappedRightTime - e->time < e->time - e->snappedLeftTime) {
        snapTime = e->snappedRightTime;
    }

    timeT newDuration = snapTime - m_currentElement->getViewAbsoluteTime();
    timeT durationDiff = newDuration - m_currentElement->getViewDuration();

    EventSelection* selection = m_scene->getSelection();
    if (!selection || selection->getAddedEvents() == 0) return NoFollow;

    EventSelection::eventcontainer::iterator it =
        selection->getSegmentEvents().begin();

    for (; it != selection->getSegmentEvents().end(); ++it) {

        MatrixElement *element = 0;
        ViewElementList::iterator vi = m_currentViewSegment->findEvent(*it);
        if (vi != m_currentViewSegment->getViewElementList()->end()) {
            element = static_cast<MatrixElement *>(*vi);
        }
        if (!element) continue;

        timeT t = element->getViewAbsoluteTime();
        timeT d = element->getViewDuration();
        
        d = d + durationDiff;
        if (d < 0) {
            t = t + d;
            d = -d;
        } else if (d == 0) {
            d = getSnapGrid()->getSnapTime(t);
        }

        element->reconfigure(t, d);
//            m_currentStaff->positionElement(element);
//        }
    }

//    m_mParentView->canvas()->update();
    return FollowHorizontal;
}

CollapseRestsCommand::CollapseRestsCommand
(EventSelection &selection) :
        BasicCommand(getGlobalName(),
                     selection.getSegment(),
                     selection.getStartTime(),
                     selection.getEndTime())
{
    // nothing else
}

/*!!!
void MatrixResizer::slotMatrixScrolled(int newX, int newY)
{
    QPoint newP1(newX, newY), oldP1(m_parentView->getCanvasView()->contentsX(),
                                    m_parentView->getCanvasView()->contentsY());

    QPoint p(newX, newY);

    if (newP1.x() > oldP1.x()) {
        p.setX(newX + m_parentView->getCanvasView()->visibleWidth());
    }

    p = m_mParentView->inverseMapPoint(p);
    int newTime = getSnapGrid()->snapX(p.x());
    handleMouseMove(newTime, 0, 0);
}
*/
void MatrixResizer::setBasicContextHelp()
{
    EventSelection *selection = m_scene->getSelection();
    if (selection && selection->getAddedEvents() > 1) {
        setContextHelp(tr("Click and drag to resize selected notes"));
    } else {
        setContextHelp(tr("Click and drag to resize a note"));
    }
}

CutAndCloseCommand::CutAndCloseCommand(EventSelection &selection,
                                       Clipboard *clipboard) :
        MacroCommand(getGlobalName())
{
    addCommand(new CutCommand(selection, clipboard));
    addCommand(new CloseCommand(&selection.getSegment(),
                                selection.getEndTime(),
                                selection.getStartTime()));
}

void
MatrixSelector::setContextHelpFor(const MatrixMouseEvent *e, bool ctrlPressed)
{
    QSettings settings;
    settings.beginGroup( GeneralOptionsConfigGroup );

    if (! qStrToBool( settings.value("toolcontexthelp", "true" ) ) ) {
        settings.endGroup();
        return;
    }
    settings.endGroup();

    MatrixElement *element = e->element;

    if (!element) {
        
        setContextHelp
            (tr("Click and drag to select; middle-click and drag to draw new note"));

    } else {
        
        // same logic as in handleLeftButtonPress
        
        float x = element->getLayoutX();
        float width = element->getWidth();
        float resizeStart = int(double(width) * 0.85) + x;

        // max size of 10
        if ((x + width) - resizeStart > 10) resizeStart = x + width - 10;

        EventSelection *s = m_scene->getSelection();

        if (e->sceneX > resizeStart) {
            if (s && s->getAddedEvents() > 1) {
                setContextHelp(tr("Click and drag to resize selected notes"));
            } else {
                setContextHelp(tr("Click and drag to resize note"));
            }
        } else {
            if (s && s->getAddedEvents() > 1) {
                if (!ctrlPressed) {
                    setContextHelp(tr("Click and drag to move selected notes; hold Ctrl as well to copy"));
                } else {
                    setContextHelp(tr("Click and drag to copy selected notes"));
                }
            } else {
                if (!ctrlPressed) {
                    setContextHelp(tr("Click and drag to move note; hold Ctrl as well to copy"));
                } else {
                    setContextHelp(tr("Click and drag to copy note"));
                }
            }                
        }
    }
}

BasicSelectionCommand::BasicSelectionCommand(const QString &name,
        EventSelection &selection,
        bool bruteForceRedo) :
    BasicCommand(name,
                 selection.getSegment(),
                 selection.getStartTime(),
                 selection.getEndTime(),
                 bruteForceRedo)
{
    // nothing
}

EventUnquantizeCommand::EventUnquantizeCommand(
    EventSelection &selection,
    Quantizer *quantizer) :
        BasicCommand(tr("Unquantize Events"),
                     selection.getSegment(),
                     selection.getStartTime(),
                     selection.getEndTime(),
                     true),  // bruteForceRedo
        m_quantizer(quantizer),
        m_selection(&selection)
{
    // nothing else
}

void
PitchBendSequenceDialog::accept()
{
    /* The user has finished the dialog, other than aborting. */

    // We don't enable "OK" if the interval isn't sensible, so
    // something's badly wrong if this test fails.
    Q_ASSERT_X(m_startTime < m_endTime, "accept",
             "got a zero or negative time interval");

    /* Save current settings.  They'll be the defaults next time. */
    saveSettings();

    // TRANSLATORS: The arg value will be either a controller name or
    // Pitchbend, so the resulting text is like "Pitchbend Sequence",
    // "Expression Sequence", etc.
    QString controllerName(m_control.getName().data());
    QString commandName(tr("%1 Sequence").arg(controllerName));
    MacroCommand *macro = new MacroCommand(commandName);

    if (getReplaceMode() != OnlyAdd) {
        // Selection initially contains no event, and we add all the
        // relevant ones.  
        EventSelection *selection = new EventSelection(*m_segment);
        for (Segment::const_iterator i = m_segment->findTime(m_startTime);
             i != m_segment->findTime(m_endTime);
             ++i) {
            Event *e = *i;
            if (m_control.matches(e)) {
                selection->addEvent(e, false);
            }
        }

        // EraseCommand takes ownership of "selection".
        macro->addCommand(new EraseCommand(*selection));
    }

    if (getReplaceMode() != OnlyErase) {
        if ((getRampMode() == Linear) &&
            (getStepSizeCalculation() == StepSizeByCount)) {
            addLinearCountedEvents(macro);
        } else {
            addStepwiseEvents(macro);
        }
    }
    CommandHistory::getInstance()->addCommand(macro);

    QDialog::accept();
}

void MatrixMover::setBasicContextHelp(bool ctrlPressed)
{
    EventSelection *selection = m_scene->getSelection();
    if (!selection || selection->getAddedEvents() < 2) {
        if (!ctrlPressed) {
            setContextHelp(tr("Click and drag to move a note; hold Ctrl as well to copy it"));
        } else {
            setContextHelp(tr("Click and drag to copy a note"));
        }
    } else {
        if (!ctrlPressed) {
            setContextHelp(tr("Click and drag to move selected notes; hold Ctrl as well to copy"));
        } else {
            setContextHelp(tr("Click and drag to copy selected notes"));
        }
    }
}

CopyCommand::CopyCommand(EventSelection &selection,
                         Clipboard *clipboard) :
        NamedCommand(getGlobalName()),
        m_targetClipboard(clipboard)
{
    m_sourceClipboard = new Clipboard;
    m_savedClipboard = 0;
    std::string label = selection.getSegment().getLabel();
    m_sourceClipboard->newSegment(&selection)->setLabel(
            appendLabel(label, qstrtostr(tr("(excerpt)"))));
}

void
MatrixSelector::setViewCurrentSelection(bool always)
{
    if (always) m_previousCollisions.clear();

    EventSelection* selection = 0;
    bool changed = getSelection(selection);
    if (!changed) {
        delete selection;
        return;
    }

    if (m_selectionToMerge && selection &&
        m_selectionToMerge->getSegment() == selection->getSegment()) {
        
        selection->addFromSelection(m_selectionToMerge);
        m_scene->setSelection(selection, true);

    } else if (!m_selectionToMerge) {

        m_scene->setSelection(selection, true);
    }
}

void
MatrixResizer::handleLeftButtonPress(const MatrixMouseEvent *e)
{
    MATRIX_DEBUG << "MatrixResizer::handleLeftButtonPress() : el = "
                 << e->element << endl;

    if (!e->element) return;

    m_currentViewSegment = e->viewSegment;
    m_currentElement = e->element;

    // Add this element and allow movement
    //
    EventSelection* selection = m_scene->getSelection();
    Event *event = m_currentElement->event();

    if (selection) {
        EventSelection *newSelection;

        if ((e->modifiers & Qt::ShiftModifier) ||
            selection->contains(event)) {
            newSelection = new EventSelection(*selection);
        } else {
            newSelection = new EventSelection(m_currentViewSegment->getSegment());
        }

        newSelection->addEvent(event);
        m_scene->setSelection(newSelection, true);
//        m_mParentView->canvas()->update();
    } else {
        m_scene->setSingleSelectedEvent(m_currentViewSegment,
                                        m_currentElement,
                                        true);
//            m_mParentView->canvas()->update();
    }
}

AddIndicationCommand::AddIndicationCommand(std::string indicationType,
                                           EventSelection &selection) :
    BasicCommand(getGlobalName(indicationType),
                 selection.getSegment(),
                 std::min(selection.getStartTime(), selection.getNotationStartTime()),
                 std::max(selection.getEndTime(), selection.getNotationEndTime())),
    m_indicationType(indicationType),
    m_indicationStart(selection.getNotationStartTime()),
    m_indicationDuration(selection.getTotalNotationDuration()),
    m_lastInsertedEvent(0)
{
    if (!canExecute()) {
        throw CommandFailed
            //!!! need to use text from trunk/src/gui/editors/notation/NotationView.cpp (but this requires an informal human-readable version of the indication name)
            (qstrtostr(tr("Can't add identical overlapping indications")));
    }
}