#include "basedialog.h"
#include "qmovewindowmanager.h"
#include "qpainter.h"
#include <QtMath>

CBaseDialog::CBaseDialog(QWidget *parent)
	: QDialog(parent)
{
	setWindowFlags(windowFlags() | Qt::FramelessWindowHint);
	setAttribute(Qt::WA_TranslucentBackground);
	base_ui.setupUi(this);
	base_ui.widget_title->installEventFilter(new QMoveWindowManager(this));
	base_ui.widget_sysbutton->setMaxVisible(false);
	base_ui.widget_sysbutton->setMinVisible(false);
	base_ui.widget_sysbutton->setControlWidget(this);
}

CBaseDialog::~CBaseDialog()
{

}

void CBaseDialog::paintEvent(QPaintEvent * event)
{
	QDialog::paintEvent(event);
	const int border_width = 6;
	const int alpha_max = 100;
	double alpha_speed = border_width > 1 ? alpha_max / qSqrt(border_width) : alpha_max;
	QPainter painter(this);
	painter.setRenderHint(QPainter::Antialiasing, true);
	painter.fillRect(border_width, border_width, width() - border_width * 2, height() - border_width * 2, QBrush(Qt::white));
	QColor color(0, 0, 0, 50);
	for (int i = 0; i < border_width; i++)
	{
		color.setAlpha(alpha_max - qSqrt(i)*alpha_speed);
		painter.setPen(color);
		QRect rc(border_width - i, border_width - i, this->width() - (border_width - i) * 2, this->height() - (border_width - i) * 2);
		painter.drawRoundedRect(rc, i + 0.5, i + 0.5);
	}
}