view widgets/LayerTree.cpp @ 349:369a197737c7

* Various fixes to object lifetime management, particularly in the spectrum
  layer and for notification of main model deletion.
  The main purpose of this is to improve the behaviour of the spectrum, but I
  think it may also help with #1840922 Various crashes in Layer Summary window.

/* -*- 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 "data/model/WaveFileModel.h"

#include <QIcon>
#include <iostream>


ModelDataModel::ModelDataModel(PaneStack *stack, bool waveModelsOnly,
                               QObject *parent) :
    QAbstractItemModel(parent),
    m_stack(stack),
    m_waveModelsOnly(waveModelsOnly)
{
    if (m_waveModelsOnly) {
        m_modelTypeColumn = -1;
        m_modelNameColumn = 0;
        m_modelMakerColumn = 1;
        m_modelSourceColumn = 2;
        m_columnCount = 3;
    } else {
        m_modelTypeColumn = 0;
        m_modelNameColumn = 1;
        m_modelMakerColumn = 2;
        m_modelSourceColumn = 3;
        m_columnCount = 4;
    }

    connect(stack, SIGNAL(paneAdded()), this, SLOT(paneAdded()));
    connect(stack, SIGNAL(paneDeleted()), this, SLOT(paneDeleted()));

    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 *)));
        connect(pane, SIGNAL(layerModelChanged()),
                this, SLOT(paneLayerModelChanged()));
    }

    rebuildModelSet();
}

ModelDataModel::~ModelDataModel()
{
}

void
ModelDataModel::rebuildModelSet()
{
    std::set<Model *> unfound = m_models;

    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;

            Model *model = layer->getModel();
            if (!model) continue;

            if (m_waveModelsOnly) {
                if (!dynamic_cast<WaveFileModel *>(model)) continue;
            }

            if (m_models.find(model) == m_models.end()) {
                connect(model, SIGNAL(aboutToBeDeleted()),
                        this, SLOT(rebuildModelSet()));
                m_models.insert(model);
            } else {
                unfound.erase(model);
            }
        }
    }

    for (std::set<Model *>::iterator i = unfound.begin();
         i != unfound.end(); ++i) {
        m_models.erase(*i);
    }

    std::cerr << "ModelDataModel::rebuildModelSet: " << m_models.size() << " models" << std::endl;
}

void
ModelDataModel::paneAdded()
{
    rebuildModelSet();
    emit layoutChanged();
}

void
ModelDataModel::paneDeleted()
{
    rebuildModelSet();
    emit layoutChanged();
}

void
ModelDataModel::paneLayerModelChanged()
{
    rebuildModelSet();
    emit layoutChanged();
}

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

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

void
ModelDataModel::propertyContainerSelected(PropertyContainer *)
{
}

void
ModelDataModel::propertyContainerPropertyChanged(PropertyContainer *pc)
{
}

void
ModelDataModel::playParametersAudibilityChanged(bool a)
{
}

QVariant
ModelDataModel::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();

    //!!! not exactly the ideal use of a std::set
    std::set<Model *>::iterator itr = m_models.begin();
    for (int i = 0; i < row && itr != m_models.end(); ++i, ++itr);
    if (itr == m_models.end()) return QVariant();

    Model *model = *itr;

    if (role != Qt::DisplayRole) {
        if (m_waveModelsOnly && col == m_modelNameColumn &&
            role == Qt::DecorationRole) {
            // There is no meaningful icon for a model, in general --
            // the icons we have represent layer types and it would be
            // misleading to use them for models.  However, if we're
            // only showing wave models, we use the waveform icon just
            // for decorative purposes.
            return QVariant(QIcon(QString(":/icons/waveform.png")));
        }
        return QVariant();
    }
    
    if (col == m_modelTypeColumn) {
        return QVariant(model->getTypeName());
    } else if (col == m_modelNameColumn) {
        return QVariant(model->objectName());
    } else if (col == m_modelMakerColumn) {
        return QVariant(model->getMaker());
    } else if (col == m_modelSourceColumn) {
        return QVariant(model->getLocation());
    }        
    
    return QVariant();
}

bool
ModelDataModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
    return false;
}

Qt::ItemFlags
ModelDataModel::flags(const QModelIndex &index) const
{
    Qt::ItemFlags flags = Qt::ItemIsEnabled;
    return flags;
}

QVariant
ModelDataModel::headerData(int section,
			   Qt::Orientation orientation,
			   int role) const
{
    if (orientation == Qt::Horizontal && role == Qt::DisplayRole) {
	if (section == m_modelTypeColumn) return QVariant(tr("Type"));
	else if (section == m_modelNameColumn) return QVariant(tr("Name"));
	else if (section == m_modelMakerColumn) return QVariant(tr("Maker"));
	else if (section == m_modelSourceColumn) return QVariant(tr("Source"));
    }

    return QVariant();
}

QModelIndex
ModelDataModel::index(int row, int column, const QModelIndex &parent) const
{
    if (!parent.isValid()) {
        if (row >= m_models.size()) return QModelIndex();
	return createIndex(row, column, 0);
    }

    return QModelIndex();
}

QModelIndex
ModelDataModel::parent(const QModelIndex &index) const
{
    return QModelIndex();
}

int
ModelDataModel::rowCount(const QModelIndex &parent) const
{
    if (!parent.isValid()) return m_models.size();
    return 0;
}

int
ModelDataModel::columnCount(const QModelIndex &parent) const
{
    return m_columnCount;
}



LayerTreeModel::LayerTreeModel(PaneStack *stack, QObject *parent) :
    QAbstractItemModel(parent),
    m_stack(stack)
{
    m_layerNameColumn = 0;
    m_layerVisibleColumn = 1;
    m_layerPlayedColumn = 2;
    m_modelNameColumn = 3;
    m_columnCount = 4;

    connect(stack, SIGNAL(paneAdded()), this, SLOT(paneAdded()));
    connect(stack, SIGNAL(paneAboutToBeDeleted(Pane *)),
            this, SLOT(paneAboutToBeDeleted(Pane *)));

    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 *)));
        connect(pane, SIGNAL(layerModelChanged()),
                this, SLOT(paneLayerModelChanged()));

        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::paneAdded()
{
    emit layoutChanged();
}

void
LayerTreeModel::paneAboutToBeDeleted(Pane *pane)
{
    std::cerr << "paneDeleted: " << pane << std::endl;
    m_deletedPanes.insert(pane);
    emit layoutChanged();
}

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

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

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

void
LayerTreeModel::paneLayerModelChanged()
{
    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,
                                             m_layerNameColumn, pane),
                                 createIndex(pane->getLayerCount() - j - 1,
                                             m_modelNameColumn, 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,
                                             m_layerPlayedColumn, pane),
                                 createIndex(pane->getLayerCount() - j - 1,
                                             m_layerPlayedColumn, 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 == m_layerNameColumn) {
                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 == m_layerVisibleColumn) {
                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 == m_layerPlayedColumn) {
                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 == m_modelNameColumn) {
                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 == m_layerVisibleColumn) {
        if (role == Qt::CheckStateRole) {
            layer->showLayer(pane, value.toInt() == Qt::Checked);
            emit dataChanged(index, index);
            return true;
        }
    } else if (col == m_layerPlayedColumn) {
        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() == m_layerVisibleColumn ||
        index.column() == m_layerPlayedColumn) {
        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 == m_layerNameColumn) return QVariant(tr("Layer"));
        else if (section == m_layerVisibleColumn) return QVariant(tr("Shown"));
        else if (section == m_layerPlayedColumn) return QVariant(tr("Played"));
	else if (section == m_modelNameColumn) 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());

    if (m_deletedPanes.find(obj) != m_deletedPanes.end()) {
//        m_deletedPanes.erase(obj);
        return QModelIndex();
    }

    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 m_columnCount;

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

    return 1;
}