#define _USE_MATH_DEFINES
#include "view.h"
#include <QtGui>
#include <qmath.h>
#include <QUndoStack>


View::View( QWidget *parent)
    : QFrame(parent)
    , tabNumber(-1)
{

    setFrameStyle(Sunken | StyledPanel);
    graphicsView = new myGraphicsView;
    graphicsView->setRenderHint(QPainter::Antialiasing, false);
    graphicsView->setDragMode(QGraphicsView::RubberBandDrag);
    graphicsView->setOptimizationFlags(QGraphicsView::DontSavePainterState);
    graphicsView->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
    curAngle = 0;

    int size = style()->pixelMetric(QStyle::PM_ToolBarIconSize);
    QSize iconSize(size, size);

    QToolButton *zoomInIcon = new QToolButton;
    zoomInIcon->setAutoRepeat(true);
    zoomInIcon->setAutoRepeatInterval(33);
    zoomInIcon->setAutoRepeatDelay(0);
    zoomInIcon->setIcon(QPixmap(":/zoomin.png"));
    zoomInIcon->setIconSize(iconSize);
    QToolButton *zoomOutIcon = new QToolButton;
    zoomOutIcon->setAutoRepeat(true);
    zoomOutIcon->setAutoRepeatInterval(33);
    zoomOutIcon->setAutoRepeatDelay(0);
    zoomOutIcon->setIcon(QPixmap(":/zoomout.png"));
    zoomOutIcon->setIconSize(iconSize);
    zoomSlider = new QSlider;
    zoomSlider->setMinimum(0);
    zoomSlider->setMaximum(500);
    zoomSlider->setValue(250);
    zoomSlider->setTickPosition(QSlider::TicksRight);

    // Zoom slider layout
    QVBoxLayout *zoomSliderLayout = new QVBoxLayout;
    zoomSliderLayout->addWidget(zoomInIcon);
    zoomSliderLayout->addWidget(zoomSlider);
    zoomSliderLayout->addWidget(zoomOutIcon);


    QGridLayout *topLayout = new QGridLayout;

    topLayout->addWidget(graphicsView, 1, 0);
    topLayout->addLayout(zoomSliderLayout, 1, 1);
    setLayout(topLayout);

    connect(zoomSlider, SIGNAL(valueChanged(int)), this, SLOT(setupMatrix()));
    connect(graphicsView->verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(setResetButtonEnabled()));
    connect(graphicsView->horizontalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(setResetButtonEnabled()));

    connect(zoomInIcon, SIGNAL(clicked()), this, SLOT(zoomIn()));
    connect(zoomOutIcon, SIGNAL(clicked()), this, SLOT(zoomOut()));


    setupMatrix();
}

void View::setAngle(qreal angle)
{
    curAngle = angle;
    setupMatrix();

}

QGraphicsView *View::gr_view() const
{
    return graphicsView;
}

void View::resetView()
{
    zoomSlider->setValue(250);

    setupMatrix();
    graphicsView->ensureVisible(QRectF(0, 0, 0, 0));

    //resetButton->setEnabled(false);
}

void View::setResetButtonEnabled()
{
    //resetButton->setEnabled(true);
}

void View::setupMatrix()
{
    qreal scale = qPow(qreal(2), (zoomSlider->value() - 250) / qreal(50));

    QMatrix matrix;

    //matrix = graphicsView->matrix();
    //matrix.scale(1., 1.);
    matrix.scale(scale, scale);
    matrix.rotate(curAngle);
    graphicsView->setMatrix(matrix);

}


void View::setGridSize(int g_size)
{
    graphicsView->setInterval(g_size);
}

void View::setShowGrid(bool grid_show)
{
    graphicsView->setShowGrid(grid_show);
}

void View::toggleAntialiasing()
{
    /*
    graphicsView->setRenderHint(QPainter::Antialiasing,
                                antialiasButton->isChecked());
                                */
}


void View::zoomIn()
{
    zoomSlider->setValue(zoomSlider->value() + 1);
}

void View::zoomOut()
{
    zoomSlider->setValue(zoomSlider->value() - 1);
}