view widgets/LayerTree.cpp @ 473:4f4f943bfdfc

* Merge from one-fftdataserver-per-fftmodel branch.  This bit of
reworking (which is not described very accurately by the title of
the branch) turns the MatrixFile object into something that either
reads or writes, but not both, and separates the FFT file cache
reader and writer implementations separately.  This allows the
FFT data server to have a single thread owning writers and one reader
per "customer" thread, and for all locking to be vastly simplified
and concentrated in the data server alone (because none of the
classes it makes use of is used in more than one thread at a time).
The result is faster and more trustworthy code.

/* -*- 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>


ModelMetadataModel::ModelMetadataModel(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();
}

ModelMetadataModel::~ModelMetadataModel()
{
}

void
ModelMetadataModel::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 << "ModelMetadataModel::rebuildModelSet: " << m_models.size() << " models" << std::endl;
}

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

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

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

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

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

void
ModelMetadataModel::propertyContainerSelected(PropertyContainer *)
{
}

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

void
ModelMetadataModel::playParametersAudibilityChanged(bool a)
{
}

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

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

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

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

int
ModelMetadataModel::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;
}