/**
 * @file groupboxcollapse.h
 * @brief Define a collapseable groupbox widget.
 * @copyright
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @author  N. Neumann <vatriani[dot}nn[at?googlemail[dot}com>
 * @version 1.0
 */

/**
 * @addtogroup GUIW Custom GUI widgets
 * @{
 */

#ifndef GROUPBOXCOLLAPSE_H
#define GROUPBOXCOLLAPSE_H

#include <QWidget>
#include <QGroupBox>
#include <QMouseEvent>

/**
 * @brief Implements collapseable GroupBox.
 *
 * Simply adding collapseable to a QGroupBox with custom markers like TreeView.
 * Checkability is needed for the indicators.
 *
 * @warning The checkable is sacrifice for collapse.
 */
class groupBoxCollapse : public QGroupBox
{
    Q_OBJECT
public:
    /**
     * @brief Default constructor.
     *
     * Sets variables to enable checkability and collapseability.
     */
    explicit groupBoxCollapse(QWidget *parent = 0);

    /**
     * @brief Is triggered by expandig GroupBox.
     *
     * At now its recommend to add your widgets visability here in your class.
     * Sets to true;
     */
    virtual void expand();
    /**
     * @brief Is triggered by collapsing GroupBox.
     *
     * At now its recommend to add your widgets visability here in your class.
     * Sets to false.
     */
    virtual void collapse();

signals:
    /**
     * @brief Is emitted by collapse changes.
     *
     * For using in QtDesigner as signal handler.
     */
    void CollapseToggle(bool);

private:
    /**
     * @brief Helper routine to determine if GroupBox is collapse or expanding.
     */
    void change();
    /**
     * @brief Reimplement the OnClick on the title for collapse.
     */
    void mouseReleaseEvent(QMouseEvent*);

    /**
     * @brief Holds the collapse state of the GroupBox.
     */
    bool isCollapse;
};

#endif // GROUPBOXCOLLAPSE_H
/**
 * @}
 */

/**
 * @file groupboxcollapse.cpp
 * @brief Define a collapseable groupbox widget.
 * @copyright
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @author  N. Neumann <vatriani[dot}nn[at?googlemail[dot}com>
 * @version 1.0
 */

#include <QIcon>

#include "groupboxcollapse.h"

groupBoxCollapse::groupBoxCollapse(QWidget *parent) :
    QGroupBox(parent)
{
    this->setCheckable(true);
    this->isCollapse = false;

    change();
}

void groupBoxCollapse::mouseReleaseEvent(QMouseEvent *event)
{
    if(event->button() == Qt::LeftButton)
    {
        this->isCollapse = !this->isCollapse;
        change();
    }
    event->accept();
}

void groupBoxCollapse::change()
{
    if(this->isCollapse)
    {
        emit CollapseToggle(false);
        collapse();
        this->setStyleSheet("QGroupBox::indicator:checked { image: url(:/); } QGroupBox { border: 0px; border-radius: 0px; }");
    }
    else
    {
        emit CollapseToggle(true);
        expand();
        this->setStyleSheet("QGroupBox::indicator:checked { image: url(:/); }");
    }
}

void groupBoxCollapse::expand()
{

}

void groupBoxCollapse::collapse()
{

}