cxTreeItemModel.cpp

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#include "cxTreeItemModel.h"

//#include "cxBrowserWidget.h"

#include <QTreeWidget>
#include <QTreeWidgetItem>
#include <QStringList>
#include <QVBoxLayout>
#include "cxPatientModelService.h"
#include "cxViewService.h"
#include "cxRep.h"
#include "cxViewGroupData.h"
#include "cxTypeConversions.h"
#include "cxTreeRepository.h"
#include "cxLogger.h"
#include <QVariant>
#include "cxStringListProperty.h"

namespace cx
{



TreeItemModel::TreeItemModel(XmlOptionFile options, VisServicesPtr services, QObject* parent) :
        QAbstractItemModel(parent),
        mServices(services),
        mOptions(options)
{
        mSelectionModel = NULL;
        mNameIndex = 1;
        mColorIndex = 0;
        mViewGroupIndex = 2;
        mViewGroupCount = 3;

        this->createShowColumnsProperty();
        this->onShowColumnsChanged();

        mRepository = TreeRepository::create(options.descend("repository"), services);
        connect(mRepository.get(), &TreeRepository::invalidated, this, &TreeItemModel::beginResetModel);
        connect(mRepository.get(), &TreeRepository::loaded, this, &TreeItemModel::loaded);
        connect(mRepository.get(), &TreeRepository::changed, this, &TreeItemModel::onRepositoryChanged);
}

void TreeItemModel::onRepositoryChanged(TreeNode* node)
{
        if (node)
        {
//              CX_LOG_CHANNEL_DEBUG("CA") << "change on node=" << node->getName();

                QModelIndex index0 = this->createIndex(0, 0, node);
                QModelIndex index1 = this->createIndex(0, mColumnCount, node);
                emit dataChanged(index0, index1);
        }
        else
        {
//              CX_LOG_CHANNEL_DEBUG("CA") << "change on all";
                emit dataChanged(QModelIndex(),QModelIndex());
        }
}


void TreeItemModel::update()
{
//      CX_LOG_CHANNEL_DEBUG("CA") << "TreeItemModel::buildTree() B";
        this->beginResetModel();
        mRepository->update();
        this->endResetModel();
//      CX_LOG_CHANNEL_DEBUG("CA") << "TreeItemModel::buildTree() E";
}

void TreeItemModel::createShowColumnsProperty()
{
        QStringList range = QStringList() << "color" << "vg0" << "vg1" << "vg2" << "vg3";
        QStringList defvals = range;
        defvals.pop_back();
        defvals.pop_back();

        std::map<QString, QString> names;
        names["color"] = "Color";
        for (unsigned i=0; i<4; ++i)
                names[QString("vg%1").arg(i)] = QString("View Group %1").arg(i);

//      QStringList range = QStringList() << "Color"
//                                                                        << "View Group 0"
//                                                                        << "View Group 1"
//                                                                        << "View Group 2"
//                                                                        << "View Group 3";
        mShowColumnsProperty = StringListProperty::initialize("visible_columns",
                                                                                                                "Columns",
                                                                                                                "Select visible columns",
                                                                                                                range,
                                                                                                                range,
                                                                                                                 mOptions.getElement());
        mShowColumnsProperty->setDisplayNames(names);
        connect(mShowColumnsProperty.get(), &Property::changed, this, &TreeItemModel::onShowColumnsChanged);
}

void TreeItemModel::onShowColumnsChanged()
{
//      CX_LOG_CHANNEL_DEBUG("CA") << "TreeItemModel::onShowColumnsChanged()";
        this->beginResetModel();

        int none = 1000;
        QStringList cols = mShowColumnsProperty->getValue();

        mColumnCount = 0;
        mNameIndex = mColumnCount++;
        mColorIndex = cols.contains("color") ? mColumnCount++ : none;
        mViewGroupCount = 0;
        while (cols.contains(QString("vg%1").arg(mViewGroupCount)))
                ++mViewGroupCount;
        mViewGroupIndex = (mViewGroupCount>0) ? mColumnCount : none;
        mColumnCount += mViewGroupCount;

//      CX_LOG_CHANNEL_DEBUG("CA") << "mColorIndex: " << mColorIndex;
//      CX_LOG_CHANNEL_DEBUG("CA") << "mNameIndex: " << mNameIndex;
//      CX_LOG_CHANNEL_DEBUG("CA") << "mViewGroupIndex: " << mViewGroupIndex;
//      CX_LOG_CHANNEL_DEBUG("CA") << "mViewGroupCount: " << mViewGroupCount;
//      CX_LOG_CHANNEL_DEBUG("CA") << "mColumnCount: " << mColumnCount;

//      this->endResetModel();
//      emit hasBeenReset();
}



void TreeItemModel::setSelectionModel(QItemSelectionModel* selectionModel)
{
        mSelectionModel = selectionModel;
        connect(mSelectionModel, &QItemSelectionModel::currentChanged,
                        this, &TreeItemModel::currentItemChangedSlot);
}

TreeItemModel::~TreeItemModel()
{
}

void TreeItemModel::currentItemChangedSlot(const QModelIndex& current, const QModelIndex& previous)
{
        TreeNode *item = this->itemFromIndex(current);
        if (!item)
                return;
        item->activate();
        emit currentItemChanged();
}

TreeNodePtr TreeItemModel::getCurrentItem()
{
        QModelIndex mi = mSelectionModel->currentIndex();
        return this->getNodeFromIndex(mi);
}

TreeNodePtr TreeItemModel::getNodeFromIndex(const QModelIndex& index)
{
        TreeNode *item = this->itemFromIndex(index);
        if (!item)
                return TreeNodePtr();
        return mRepository->getNode(item->getUid());
}

TreeNode* TreeItemModel::itemFromIndex(const QModelIndex& index) const
{
        if (!index.isValid())
                return mRepository->getTopNode().get();
        else
                return static_cast<TreeNode*>(index.internalPointer());
}

int TreeItemModel::columnCount(const QModelIndex& parent) const
{
        if (parent.isValid() && (parent.column() != mNameIndex)) // ignore for all but first column
                return 0;
        return mColumnCount;
}

int TreeItemModel::rowCount(const QModelIndex& parent) const
{
        if (parent.isValid() && (parent.column() != mNameIndex)) // ignore for all but first column
                return 0;
        TreeNode *parentItem = this->itemFromIndex(parent);
        return parentItem->getVisibleChildren().size();
}

QVariant TreeItemModel::data(const QModelIndex& index, int role) const
{
        if (role==Qt::DisplayRole)
        {
                if (index.column()==mNameIndex)
                {
                        TreeNode *item = this->itemFromIndex(index);
                        return item->getName();
                }
        }
        if (role==Qt::CheckStateRole)
        {
                if (this->isViewGroupColumn(index.column()))
                {
                        TreeNode *item = this->itemFromIndex(index);
                        return item->getViewGroupVisibility(this->viewGroupFromColumn(index.column()));
                }
        }
        if (role==Qt::ToolTipRole || role==Qt::StatusTipRole)
        {
                TreeNode *item = this->itemFromIndex(index);
                if (index.column()==mNameIndex)
                        return QString("%1 of type %2").arg(item->getName()).arg(item->getType());
                if (this->isViewGroupColumn(index.column()))
                        return QString("Set visibility of %1 in view group %2")
                                        .arg(item->getName()).arg(this->viewGroupFromColumn(index.column()));
        }
        if (role==Qt::DecorationRole)
        {
                TreeNode *item = this->itemFromIndex(index);
                if (index.column()==mNameIndex)
                        return item->getIcon();
                if (index.column()==mColorIndex)
                {
                        if (item->getColor().canConvert<QColor>())
                                        return this->getColorIcon(item->getColor().value<QColor>());
                }
        }
        if (role==Qt::FontRole)
        {
                if (index.column()==mNameIndex)
                {
                        TreeNode *item = this->itemFromIndex(index);
                        return item->getFont();
                }
        }
        if (role==Qt::ForegroundRole)
        {
                if (index.column()==mNameIndex)
                {
                        TreeNode *item = this->itemFromIndex(index);
//                      if (item->useColoredName())
                        {
                                QVariant color = item->getColor();
                                if (color.canConvert<QColor>())
                                {
                                        QColor oldColor = color.value<QColor>().toHsv();
                                        QColor newColor = this->adjustColorToContrastWithWhite(oldColor);
                                        return newColor;
                                }
                        }
                }
        }
        return QVariant();
}


bool TreeItemModel::setData(const QModelIndex& index, const QVariant& value, int role)
{
        if (role==Qt::CheckStateRole)
        {
                if (this->isViewGroupColumn(index.column()))
                {
                        TreeNode *item = this->itemFromIndex(index);
                        item->setViewGroupVisibility(this->viewGroupFromColumn(index.column()), value.value<int>());
                }
                return true;
        }
        return false;
}

Qt::ItemFlags TreeItemModel::flags(const QModelIndex& index) const
{
        if (index.column()>0)
                return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsUserCheckable;
        else
                return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
}

bool TreeItemModel::isViewGroupColumn(int col) const
{
        return ( (0<=(col-mViewGroupIndex))
                        &&
                        ((col-mViewGroupIndex) < mViewGroupCount)
                        );
}
int TreeItemModel::viewGroupFromColumn(int col) const
{
        return (col-mViewGroupIndex);
}

QVariant TreeItemModel::headerData(int section, Qt::Orientation orientation, int role) const
{
        if (orientation == Qt::Horizontal && role == Qt::DisplayRole)
        {
                if (section==mNameIndex)
                        return "    Item";
                if (section==mColorIndex)
                        return ""; // keep short + out of the way of the toolbar button
                if (this->isViewGroupColumn(section))
                        return QString("V%1").arg(this->viewGroupFromColumn(section));
        }
        return QVariant();
}

QModelIndex TreeItemModel::index(int row, int column, const QModelIndex& parent) const
{
        TreeNode *parentItem = this->itemFromIndex(parent);
        std::vector<TreeNodePtr> children = parentItem->getVisibleChildren();
        if (row < children.size())
        {
                return createIndex(row, column, children[row].get());
        }
        else
        {
                return QModelIndex();
        }
}

QModelIndex TreeItemModel::parent(const QModelIndex& index) const
{
        TreeNode *childItem = this->itemFromIndex(index);

        if (!childItem)
                return QModelIndex();

        TreeNode *parentItem = childItem->getVisibleParent().get();

        if (parentItem == mRepository->getTopNode().get())
                return QModelIndex();

        // find row of parent within grandparent
        TreeNodePtr grandParent = parentItem->getVisibleParent();
        int row = 0;
        if (grandParent)
        {
                std::vector<TreeNodePtr> parentSiblings = grandParent->getVisibleChildren();
                for (row=0; row<parentSiblings.size(); ++row)
                        if (parentItem==parentSiblings[row].get())
                                break;
        }

        return createIndex(row, mNameIndex, parentItem);
}

QIcon TreeItemModel::getColorIcon(QColor color) const
{
        QImage image(QSize(128,128), QImage::Format_RGBA8888);
        QPainter painter(&image);
        painter.fillRect(image.rect(), QColor("white"));
        painter.setBrush(QBrush(color));
        painter.drawRoundedRect(image.rect(), 75, 75, Qt::RelativeSize);
//      painter.drawEllipse(image.rect());
        return QIcon(QPixmap::fromImage(image));
}

QColor TreeItemModel::adjustColorToContrastWithWhite(QColor color) const
{
        // use some tricks in HSV space to get contrasting colors while
        // keeping the original color as much as possible.
        //
        // for colors: strengthen the saturation: s' = s+(1-s)/2
        // for for grayscale: lower value, or give up for whites:
        //           if s<0.1: v = max(0.7, v)
        double h = color.hueF();
        double s = color.hsvSaturationF();
        double v = color.valueF();

        double isChromatic = s > 0.1; // our definition
        if (isChromatic)
        {
                s = s+(1.0-s)/2;
        }
        else
        {
                v = std::min(0.6, v);
        }

        return QColor::fromHsvF(h,s,v);
}



}//end namespace cx