segmentselector.cpp

LINUX下的混音软件

                timeT itemEndTime = itemStartTime + segment->getEndMarkerTime()
                                    - segment->getStartTime();

                command->addSegment(segment,
                                    itemStartTime,
                                    itemEndTime,
                                    itemTrackId);

            }

            addCommandToHistory(command);
        }

        m_canvas->getModel()->endChange();
        m_canvas->slotUpdateSegmentsDrawBuffer();

    }

    // if we've just finished a quick copy then drop the Z level back
    if (m_segmentQuickCopyDone) {
        m_segmentQuickCopyDone = false;
        //        m_currentItem->setZ(2); // see SegmentItem::setSelected  --??
    }

    setChangeMade(false);

    m_selectionMoveStarted = false;

    m_currentItem = CompositionItem();

    setContextHelpFor(e->pos());
}

int
SegmentSelector::handleMouseMove(QMouseEvent *e)
{
    if (!m_buttonPressed) {
        setContextHelpFor(e->pos(), (e->state() & Qt::ControlButton));
        return RosegardenCanvasView::NoFollow;
    }

    if (m_dispatchTool) {
        return m_dispatchTool->handleMouseMove(e);
    }

    if (!m_currentItem) {

        // 	RG_DEBUG << "SegmentSelector::handleMouseMove: no current item\n";

        // do a bounding box
        QRect selectionRect = m_canvas->getSelectionRect();

        m_canvas->setDrawSelectionRect(true);

        // same as for notation view
        int w = int(e->pos().x() - selectionRect.x());
        int h = int(e->pos().y() - selectionRect.y());
        if (w > 0)
            ++w;
        else
            --w;
        if (h > 0)
            ++h;
        else
            --h;

        // Translate these points
        //
        m_canvas->setSelectionRectSize(w, h);

        m_canvas->getModel()->signalSelection();
        return RosegardenCanvasView::FollowHorizontal | RosegardenCanvasView::FollowVertical;
    }

    m_canvas->viewport()->setCursor(Qt::sizeAllCursor);

    if (m_segmentCopyMode && !m_segmentQuickCopyDone) {
        KMacroCommand *mcommand = new KMacroCommand
                                  (SegmentQuickCopyCommand::getGlobalName());

        SegmentSelection selectedItems = m_canvas->getSelectedSegments();
        SegmentSelection::iterator it;
        for (it = selectedItems.begin();
                it != selectedItems.end();
                it++) {
            SegmentQuickCopyCommand *command =
                new SegmentQuickCopyCommand(*it);

            mcommand->addCommand(command);
        }

        addCommandToHistory(mcommand);

        // generate SegmentItem
        //
        m_canvas->updateContents();
        m_segmentQuickCopyDone = true;
    }

    m_canvas->setSnapGrain(true);

    if (m_canvas->getModel()->isSelected(m_currentItem)) {

        if (!m_canvas->isFineGrain()) {
            setContextHelp(i18n("Hold Shift to avoid snapping to beat grid"));
        } else {
            clearContextHelp();
        }

        // 	RG_DEBUG << "SegmentSelector::handleMouseMove: current item is selected\n";

        if (!m_selectionMoveStarted) { // start move on selected items only once
            m_canvas->getModel()->startChangeSelection(CompositionModel::ChangeMove);
            m_selectionMoveStarted = true;
        }

        CompositionModel::itemcontainer& changingItems = m_canvas->getModel()->getChangingItems();
        setCurrentItem(CompositionItemHelper::findSiblingCompositionItem(changingItems, m_currentItem));

        CompositionModel::itemcontainer::iterator it;
        int guideX = 0;
        int guideY = 0;

        for (it = changingItems.begin();
                it != changingItems.end();
                ++it) {

            //             RG_DEBUG << "SegmentSelector::handleMouseMove() : movingItem at "
            //                      << (*it)->rect().x() << "," << (*it)->rect().y() << endl;

            int dx = e->pos().x() - m_clickPoint.x(),
                     dy = e->pos().y() - m_clickPoint.y();

            const int inertiaDistance = m_canvas->grid().getYSnap() / 3;
            if (!m_passedInertiaEdge &&
                    (dx < inertiaDistance && dx > -inertiaDistance) &&
                    (dy < inertiaDistance && dy > -inertiaDistance)) {
                return RosegardenCanvasView::NoFollow;
            } else {
                m_passedInertiaEdge = true;
            }

            timeT newStartTime = m_canvas->grid().snapX((*it)->savedRect().x() + dx);

            int newX = int(m_canvas->grid().getRulerScale()->getXForTime(newStartTime));
            int newY = m_canvas->grid().snapY((*it)->savedRect().y() + dy);
            // Make sure we don't set a non-existing track
            if (newY < 0) {
                newY = 0;
            }
            TrackId trackPos = m_canvas->grid().getYBin(newY);

            // 	    RG_DEBUG << "SegmentSelector::handleMouseMove: orig y " << (*it)->rect().y()
            // 		     << ", dy " << dy << ", newY " << newY << ", track " << track << endl;

            // Make sure we don't set a non-existing track (c'td)
            // TODO: make this suck less. Either the tool should
            // not allow it in the first place, or we automatically
            // create new tracks - might make undo very tricky though
            //
            if (trackPos >= m_doc->getComposition().getNbTracks())
                trackPos = m_doc->getComposition().getNbTracks() - 1;

            newY = m_canvas->grid().getYBinCoordinate(trackPos);

            (*it)->moveTo(newX, newY);
            setChangeMade(true);
        }

        if (changeMade())
            m_canvas->getModel()->signalContentChange();

        guideX = m_currentItem->rect().x();
        guideY = m_currentItem->rect().y();

        m_canvas->setGuidesPos(guideX, guideY);

        timeT currentItemStartTime = m_canvas->grid().snapX(m_currentItem->rect().x());

        Composition &comp = m_doc->getComposition();
        RealTime time =
            comp.getElapsedRealTime(currentItemStartTime);
        QString ms;
        ms.sprintf("%03d", time.msec());

        int bar, beat, fraction, remainder;
        comp.getMusicalTimeForAbsoluteTime(currentItemStartTime, bar, beat, fraction, remainder);

        QString posString = QString("%1.%2s (%3, %4, %5)")
                            .arg(time.sec).arg(ms)
                            .arg(bar + 1).arg(beat).arg(fraction);

        m_canvas->setTextFloat(guideX + 10, guideY - 30, posString);
        m_canvas->updateContents();

    } else {
        // 	RG_DEBUG << "SegmentSelector::handleMouseMove: current item not selected\n";
    }

    return RosegardenCanvasView::FollowHorizontal | RosegardenCanvasView::FollowVertical;
}

void SegmentSelector::setContextHelpFor(QPoint p, bool ctrlPressed)
{
    kapp->config()->setGroup(GeneralOptionsConfigGroup);
    if (!kapp->config()->readBoolEntry("toolcontexthelp", true)) return;

    CompositionItem item = m_canvas->getFirstItemAt(p);

    if (!item) {
        setContextHelp(i18n("Click and drag to select segments; middle-click and drag to draw an empty segment"));

    } else {

        // Same logic as in handleMouseButtonPress to establish
        // whether we'd be moving or resizing

        int threshold = int(float(item->rect().width()) * 0.15);
        if (threshold == 0) threshold = 1;
        if (threshold > 10) threshold = 10;
        bool start = false;

        if ((!m_segmentAddMode ||
             !m_canvas->getModel()->haveSelection()) &&
            SegmentResizer::cursorIsCloseEnoughToEdge(item, p,
                                                      threshold, start)) {
            if (!ctrlPressed) {
                setContextHelp(i18n("Click and drag to resize a segment; hold Ctrl as well to rescale its contents"));
            } else {
                setContextHelp(i18n("Click and drag to rescale segment"));
            }
        } else {
            if (m_canvas->getModel()->haveMultipleSelection()) {
                if (!ctrlPressed) {
                    setContextHelp(i18n("Click and drag to move segments; hold Ctrl as well to copy them"));
                } else {
                    setContextHelp(i18n("Click and drag to copy segments"));
                }
            } else {
                if (!ctrlPressed) {
                    setContextHelp(i18n("Click and drag to move segment; hold Ctrl as well to copy it; double-click to edit"));
                } else {
                    setContextHelp(i18n("Click and drag to copy segment"));
                }
            }
        }
    }
}

const QString SegmentSelector::ToolName = "segmentselector";

}
#include "SegmentSelector.moc"