#ifndef TITLEBAR_H
#define TITLEBAR_H

#include <QtGui/QLabel>

QT_BEGIN_NAMESPACE
class QPushButton;
class QPixmap;
class QPoint;
QT_END_NAMESPACE

class TitleBar : public QLabel
{
    Q_OBJECT

private:
    QPushButton* _minimizeButton, * _closeButton;
    QPixmap _titleBarPixmap;

    QPoint startPos;

    bool _isPressed;

    QWidget* contentWidget;

protected:
    void mousePressEvent(QMouseEvent* );
    void mouseReleaseEvent(QMouseEvent* );
    void mouseMoveEvent(QMouseEvent* );

public:
    TitleBar(QWidget * contentWidget);
    ~TitleBar();

public slots:
    void show();
    void move(int x, int y);
    void close();
    void showMinimized();
};

#endif // TITLEBAR_H

#include "titlebar.h"

QT_BEGIN_HEADER
#include <QPushButton>
#include <QPainter>
#include <QImage>
#include <QHBoxLayout>
#include <QMouseEvent>
#include <QPoint>
#include <QApplication>
#include <QPixmap>
#include <QBitmap>
#include <QShowEvent>
QT_END_HEADER

TitleBar::TitleBar(QWidget* contentWidget) :
      _titleBarPixmap(":/images/title_bar.png")
{
    _isPressed = false;

    _closeButton = new QPushButton;
    _minimizeButton = new QPushButton;

    QString qss = "";

    qss.append("QPushButton { border: none; background-image: url(:images/button/window/line.png); background-position: center center; background-repeat: none; height: 16px; width: 16px; }");
    qss.append("QPushButton:hover { border: none; background-image: url(:images/button/window/line_hover.png); background-position: center center; background-repeat: none; height: 16px; width: 16px; }");
    qss.append("QPushButton:pressed { border: none; background-image: url(:images/button/window/line_active.png); background-position: center center; background-repeat: none; height: 16px; width: 16px; }");

    _minimizeButton->setStyleSheet(qss);

    qss = "";
    qss.append("QPushButton { border: none; background-image: url(:images/button/window/close.png); background-position: center center; background-repeat: none; height: 16px; width: 16px; }");
    qss.append("QPushButton:hover { border: none; background-image: url(:images/button/window/close_hover.png); background-position: center center; background-repeat: none; height: 16px; width: 16px; }");
    qss.append("QPushButton:pressed { border: none; background-image: url(:images/button/window/close_active.png); background-position: center center; background-repeat: none; height: 16px; width: 16px; }");

    _closeButton->setStyleSheet(qss);

    QHBoxLayout* layout = new QHBoxLayout;
    layout->addStretch();
    layout->addWidget(_minimizeButton);
    layout->addWidget(_closeButton);
    layout->addSpacing(10);

    setLayout(layout);

    setFixedHeight(48);
    setFixedWidth(368);

    this->contentWidget = contentWidget;
    this->contentWidget->setWindowFlags(Qt::FramelessWindowHint | Qt::Drawer);

    connect(_closeButton, SIGNAL(clicked()), this, SLOT(close()));
    connect(_minimizeButton, SIGNAL(clicked()), this, SLOT(showMinimized()));

    setPixmap(_titleBarPixmap);
    setMask(_titleBarPixmap.mask());
}

TitleBar::~TitleBar()
{

}

void TitleBar::mousePressEvent(QMouseEvent* event)
{
    if (event->button() == Qt::LeftButton) {
        _isPressed = true;
        startPos = event->pos();
    }
}

void TitleBar::mouseReleaseEvent(QMouseEvent* event)
{
    if(event->button() == Qt::LeftButton) {
        _isPressed = false;
    }
}

void TitleBar::mouseMoveEvent(QMouseEvent* event)
{
    if (_isPressed) {
        move(event->globalX() - startPos.x(), event->globalY() - startPos.y());
    }
}

void TitleBar::show()
{
    QWidget::show();
    contentWidget->show();
    contentWidget->move(x(), y() + height());
}

void TitleBar::move(int x, int y)
{
    QWidget::move(x, y);
    contentWidget->move(x, y + height());
}

void TitleBar::close()
{
    QWidget::close();
    contentWidget->close();
}

void TitleBar::showMinimized()
{
    QWidget::showMinimized();
}