/*
    This file is part of EqualizerAPO, a system-wide equalizer.
    Copyright (C) 2015  Jonas Thedering

    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.

    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 General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include <QMouseEvent>

#include "Editor/helpers/DPIHelper.h"
#include "ResizeCorner.h"

ResizeCorner::ResizeCorner(FilterTable* filterTable, QSize minimumSize, QSize maximumSize, std::function<QSize()> getFunc, std::function<void(QSize)> setFunc, QWidget* parent)
	: QLabel(parent), minimumSize(minimumSize), maximumSize(maximumSize), getFunc(getFunc), setFunc(setFunc), filterTable(filterTable)
{
	QIcon icon(":/icons/resize_corner.ico");
	QSize desiredSize = DPIHelper::scale(QSize(16, 16));
	QSize actualSize = icon.actualSize(desiredSize);
	QPixmap pixmap = icon.pixmap(actualSize);
	setPixmap(pixmap);
	setCursor(Qt::SizeFDiagCursor);
	// move icon to lower right if it does not fill the full area
	setContentsMargins(desiredSize.width() - actualSize.width(), desiredSize.height() - actualSize.height(), 0, 0);
}

void ResizeCorner::mousePressEvent(QMouseEvent* event)
{
	filterTable->setMinimumHeightHint(filterTable->height());
	QSize size = getFunc();
	offsetX = size.width() - event->globalX();
	offsetY = size.height() - event->globalY();
}

void ResizeCorner::mouseMoveEvent(QMouseEvent* event)
{
	QSize size;
	size.setWidth(offsetX + event->globalPos().x());
	size.setHeight(offsetY + event->globalPos().y());
	size = size.expandedTo(minimumSize);
	size = size.boundedTo(maximumSize);
	setFunc(size);
}

void ResizeCorner::mouseReleaseEvent(QMouseEvent*)
{
	filterTable->setMinimumHeightHint(0);
}