/****************************************************************************
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** Copyright (C) 2013 Sandro S. Andrade <sandroandrade@kde.org>
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** This file is part of the QtModelingWidgets module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU
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** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
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****************************************************************************/
#include "qmodelingobjectpropertyeditor.h"
#include "qmodelingobjectpropertyeditor_p.h"
#include "qmodelingobjectpropertymodel.h"
#include "qmodelingobjectpropertyfiltermodel.h"
#include "internal/filterwidget_p.h"
#include "internal/propertyeditoritemdelegate_p.h"

#include <QtModeling/QModelingObject>

#include <QtWidgets/QLabel>
#include <QtWidgets/QTreeView>
#include <QtWidgets/QHBoxLayout>

QT_BEGIN_NAMESPACE

/*!
    \class QModelingObjectPropertyEditor

    \inmodule QtModelingWidgets

    \brief The QModelingObjectPropertyEditor class provides a Qt view for handling
    model element's properties.
*/

QModelingObjectPropertyEditorPrivate::QModelingObjectPropertyEditorPrivate() :
    label(new QLabel),
    treeView(new QTreeView),
    filter(new FilterWidget),
    proxyModel(new QModelingObjectPropertyFilterModel(q_func())),
    propertyModel(0)
{
}

QModelingObjectPropertyEditorPrivate::~QModelingObjectPropertyEditorPrivate()
{
    delete proxyModel;
}

/*!
    Creates a new QModelingObjectPropertyEditor with the given \a parent and window flags \a f.
*/
QModelingObjectPropertyEditor::QModelingObjectPropertyEditor(QWidget *parent, Qt::WindowFlags f) :
    QWidget(*new QModelingObjectPropertyEditorPrivate, parent, f)
{
    Q_D(QModelingObjectPropertyEditor);

    d->treeView->setMinimumSize(QSize(350, 0));
    d->treeView->setEditTriggers(QAbstractItemView::AllEditTriggers);
    d->treeView->setAlternatingRowColors(true);
    QPalette propertyPallete = d->treeView->palette();
    propertyPallete.setColor(QPalette::Active, QPalette::Base, QColor(255, 242, 222));
    propertyPallete.setColor(QPalette::Inactive, QPalette::Base, QColor(255, 242, 222));
    propertyPallete.setColor(QPalette::Active, QPalette::AlternateBase, QColor(255, 255, 191));
    propertyPallete.setColor(QPalette::Inactive, QPalette::AlternateBase, QColor(255, 255, 191));
    d->treeView->setPalette(propertyPallete);
    d->treeView->setUniformRowHeights(true);
    d->treeView->setItemDelegateForColumn(1, new PropertyEditorItemDelegate(d->treeView));
    d->treeView->setModel(d->proxyModel);

    d->proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);

    QVBoxLayout *layout = new QVBoxLayout(this);
    layout->setSpacing(2);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->addWidget(d->filter);
    layout->addWidget(d->label);
    layout->addWidget(d->treeView);

    connect(d->filter, &FilterWidget::filterChanged,
            d->proxyModel, static_cast<void (QSortFilterProxyModel::*)(const QString &)>(&QSortFilterProxyModel::setFilterRegExp));
    connect(d->filter, &FilterWidget::filterChanged, this, &QModelingObjectPropertyEditor::filterChanged);
}

/*!
    Destroys the QModelingObjectPropertyEditor.
*/
QModelingObjectPropertyEditor::~QModelingObjectPropertyEditor()
{
}

/*!
    Adjusts \a propertyModel as the model handled by this QModelingObjectPropertyEditor.
*/
void QModelingObjectPropertyEditor::setModel(QModelingObjectPropertyModel *propertyModel)
{
    Q_D(QModelingObjectPropertyEditor);

    if (d->propertyModel) {
        disconnect(d->propertyModel, 0, this, 0);
        delete d->propertyModel;
    }
    d->propertyModel = propertyModel;
    d->proxyModel->setSourceModel(d->propertyModel);
    if (propertyModel)
        connect(propertyModel, &QAbstractItemModel::modelReset, this, &QModelingObjectPropertyEditor::modelReset);
}

/*!
    Returns the QModelingObjectPropertyModel handled by this QModelingObjectPropertyEditor.
*/
QModelingObjectPropertyModel *QModelingObjectPropertyEditor::model() const
{
    Q_D(const QModelingObjectPropertyEditor);

    return d->propertyModel;
}

void QModelingObjectPropertyEditor::filterChanged()
{
    Q_D(QModelingObjectPropertyEditor);

    d->treeView->expandAll();
    d->treeView->resizeColumnToContents(0);
    d->treeView->resizeColumnToContents(1);
}

void QModelingObjectPropertyEditor::modelReset()
{
    Q_D(QModelingObjectPropertyEditor);

    if (d->propertyModel->modelingObject()) {
        d->label->setText(QString::fromLatin1("%1: %2").arg(d->propertyModel->modelingObject()->objectName()).arg(QString::fromLatin1(d->propertyModel->modelingObject()->metaObject()->className()).remove(QRegularExpression(QStringLiteral("Object$")))));
        d->treeView->expandAll();
        d->treeView->resizeColumnToContents(0);
        d->treeView->resizeColumnToContents(1);
    }
}

QT_END_NAMESPACE