view widgets/LayerTree.cpp @ 312:6de6f78b13a1

* Make it possible to drop audio files, layer files, session files and images onto SV panes. Need to do a bit more work on where we expect the dropped file to go, particularly in the case of audio files -- at the moment they're always opened in new panes, but it may be better to by default replace whatever is in the target pane.
author Chris Cannam
date Wed, 10 Oct 2007 15:18:02 +0000
parents 226cb289bdf4
children 4a542ba875c2
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#include "LayerTree.h"
#include "view/PaneStack.h"

#include "base/PlayParameters.h"
#include "view/Pane.h"
#include "layer/Layer.h"
#include "data/model/Model.h"

#include <QIcon>
#include <iostream>


LayerTreeModel::LayerTreeModel(PaneStack *stack, QObject *parent) :
    QAbstractItemModel(parent),
    m_stack(stack)
{
    connect(stack, SIGNAL(paneAdded()), this, SIGNAL(layoutChanged()));
    connect(stack, SIGNAL(paneDeleted()), this, SIGNAL(layoutChanged()));

    for (int i = 0; i < stack->getPaneCount(); ++i) {
        Pane *pane = stack->getPane(i);
        if (!pane) continue;
        connect(pane, SIGNAL(propertyContainerAdded(PropertyContainer *)),
                this, SLOT(propertyContainerAdded(PropertyContainer *)));
        connect(pane, SIGNAL(propertyContainerRemoved(PropertyContainer *)),
                this, SLOT(propertyContainerRemoved(PropertyContainer *)));
        connect(pane, SIGNAL(propertyContainerSelected(PropertyContainer *)),
                this, SLOT(propertyContainerSelected(PropertyContainer *)));
        connect(pane, SIGNAL(propertyContainerPropertyChanged(PropertyContainer *)),
                this, SLOT(propertyContainerPropertyChanged(PropertyContainer *)));
        connect(pane, SIGNAL(propertyContainerNameChanged(PropertyContainer *)),
                this, SLOT(propertyContainerPropertyChanged(PropertyContainer *)));
        for (int j = 0; j < pane->getLayerCount(); ++j) {
            Layer *layer = pane->getLayer(j);
            if (!layer) continue;
            PlayParameters *params = layer->getPlayParameters();
            if (!params) continue;
            connect(params, SIGNAL(playAudibleChanged(bool)),
                    this, SLOT(playParametersAudibilityChanged(bool)));
        }
    }
}

LayerTreeModel::~LayerTreeModel()
{
}

void
LayerTreeModel::propertyContainerAdded(PropertyContainer *)
{
    emit layoutChanged();
}

void
LayerTreeModel::propertyContainerRemoved(PropertyContainer *)
{
    emit layoutChanged();
}

void
LayerTreeModel::propertyContainerSelected(PropertyContainer *)
{
    emit layoutChanged();
}

void
LayerTreeModel::propertyContainerPropertyChanged(PropertyContainer *pc)
{
    for (int i = 0; i < m_stack->getPaneCount(); ++i) {
        Pane *pane = m_stack->getPane(i);
        if (!pane) continue;
        for (int j = 0; j < pane->getLayerCount(); ++j) {
            if (pane->getLayer(j) == pc) {
                emit dataChanged(createIndex(pane->getLayerCount() - j - 1,
                                             0, pane),
                                 createIndex(pane->getLayerCount() - j - 1,
                                             3, pane));
            }
        }
    }
}

void
LayerTreeModel::playParametersAudibilityChanged(bool a)
{
    PlayParameters *params = dynamic_cast<PlayParameters *>(sender());
    if (!params) return;

    std::cerr << "LayerTreeModel::playParametersAudibilityChanged("
              << params << "," << a << ")" << std::endl;

    for (int i = 0; i < m_stack->getPaneCount(); ++i) {
        Pane *pane = m_stack->getPane(i);
        if (!pane) continue;
        for (int j = 0; j < pane->getLayerCount(); ++j) {
            Layer *layer = pane->getLayer(j);
            if (!layer) continue;
            if (layer->getPlayParameters() == params) {
                std::cerr << "LayerTreeModel::playParametersAudibilityChanged("
                          << params << "," << a << "): row " << pane->getLayerCount() - j - 1 << ", col " << 2 << std::endl;

                emit dataChanged(createIndex(pane->getLayerCount() - j - 1,
                                             2, pane),
                                 createIndex(pane->getLayerCount() - j - 1,
                                             2, pane));
            }
        }
    }
}

QVariant
LayerTreeModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid()) return QVariant();

    QObject *obj = static_cast<QObject *>(index.internalPointer());
    int row = index.row(), col = index.column();

    Pane *pane = dynamic_cast<Pane *>(obj);
    if (!pane) {
        if (col == 0 && row < m_stack->getPaneCount()) {
            switch (role) {
            case Qt::DisplayRole:
                return QVariant(QString("Pane %1").arg(row + 1));
            case Qt::DecorationRole:
                return QVariant(QIcon(QString(":/icons/pane.png")));
            default: break;
            }
        }
    }

    if (pane && pane->getLayerCount() > row) {
        Layer *layer = pane->getLayer(pane->getLayerCount() - row - 1);
        if (layer) {
            if (col == 0) {
                switch (role) {
                case Qt::DisplayRole:
                    return QVariant(layer->objectName());
                case Qt::DecorationRole:
                    return QVariant
                        (QIcon(QString(":/icons/%1.png")
                               .arg(layer->getPropertyContainerIconName())));
                default: break;
                }
            } else if (col == 1) {
                if (role == Qt::CheckStateRole) {
                    return QVariant(layer->isLayerDormant(pane) ?
                                    Qt::Unchecked : Qt::Checked);
                } else if (role == Qt::TextAlignmentRole) {
                    return QVariant(Qt::AlignHCenter);
                }
            } else if (col == 2) {
                if (role == Qt::CheckStateRole) {
                    PlayParameters *params = layer->getPlayParameters();
                    if (params) return QVariant(params->isPlayMuted() ?
                                                Qt::Unchecked : Qt::Checked);
                    else return QVariant();
                } else if (role == Qt::TextAlignmentRole) {
                    return QVariant(Qt::AlignHCenter);
                }
            } else if (col == 3) {
                Model *model = layer->getModel();
                if (model && role == Qt::DisplayRole) {
                    return QVariant(model->objectName());
                }
            }
        }
    }

    return QVariant();
}

bool
LayerTreeModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
    if (!index.isValid()) return false;

    QObject *obj = static_cast<QObject *>(index.internalPointer());
    int row = index.row(), col = index.column();

    Pane *pane = dynamic_cast<Pane *>(obj);
    if (!pane || pane->getLayerCount() <= row) return false;

    Layer *layer = pane->getLayer(pane->getLayerCount() - row - 1);
    if (!layer) return false;

    if (col == 1) {
        if (role == Qt::CheckStateRole) {
            layer->showLayer(pane, value.toInt() == Qt::Checked);
            emit dataChanged(index, index);
            return true;
        }
    } else if (col == 2) {
        if (role == Qt::CheckStateRole) {
            PlayParameters *params = layer->getPlayParameters();
            if (params) {
                params->setPlayMuted(value.toInt() == Qt::Unchecked);
                emit dataChanged(index, index);
                return true;
            }
        }
    }

    return false;
}

Qt::ItemFlags
LayerTreeModel::flags(const QModelIndex &index) const
{
    Qt::ItemFlags flags = Qt::ItemIsEnabled;
    if (!index.isValid()) return flags;

    if (index.column() == 1 || index.column() == 2) {
        flags |= Qt::ItemIsUserCheckable;
    } else if (index.column() == 0) {
        flags |= Qt::ItemIsSelectable;
    }

    return flags;
}

QVariant
LayerTreeModel::headerData(int section,
			   Qt::Orientation orientation,
			   int role) const
{
    if (orientation == Qt::Horizontal && role == Qt::DisplayRole) {
	if (section == 0) return QVariant(tr("Layer"));
        else if (section == 1) return QVariant(tr("Shown"));
        else if (section == 2) return QVariant(tr("Played"));
	else if (section == 3) return QVariant(tr("Model"));
    }

    return QVariant();
}

QModelIndex
LayerTreeModel::index(int row, int column, const QModelIndex &parent) const
{
    // cell for a pane contains row, column, pane stack
    // -> its parent is the invalid cell

    // cell for a layer contains row, column, pane
    // -> its parent is row, column, pane stack (which identify the pane)

    if (!parent.isValid()) {
        if (row >= m_stack->getPaneCount() || column > 0) return QModelIndex();
	return createIndex(row, column, m_stack);
    }

    QObject *obj = static_cast<QObject *>(parent.internalPointer());

    if (obj == m_stack) {
        Pane *pane = m_stack->getPane(parent.row());
        if (!pane || parent.column() > 0) return QModelIndex();
        return createIndex(row, column, pane);
    }

    return QModelIndex();
}

QModelIndex
LayerTreeModel::parent(const QModelIndex &index) const
{
    QObject *obj = static_cast<QObject *>(index.internalPointer());

    Pane *pane = dynamic_cast<Pane *>(obj);
    if (pane) {
        int index = m_stack->getPaneIndex(pane);
        if (index >= 0) return createIndex(index, 0, m_stack);
    }

    return QModelIndex();
}

int
LayerTreeModel::rowCount(const QModelIndex &parent) const
{
    if (!parent.isValid()) return m_stack->getPaneCount();

    QObject *obj = static_cast<QObject *>(parent.internalPointer());
    
    if (obj == m_stack) {
        Pane *pane = m_stack->getPane(parent.row());
        if (!pane || parent.column() > 0) return 0;
        return pane->getLayerCount();
    }

    return 0;
}

int
LayerTreeModel::columnCount(const QModelIndex &parent) const
{
    if (!parent.isValid()) return 4;

    QObject *obj = static_cast<QObject *>(parent.internalPointer());
    if (obj == m_stack) return 4; // row for a layer

    return 1;
}