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/*
 For general Scribus (>=1.3.2) copyright and licensing information please refer
 to the COPYING file provided with the program. Following this notice may exist
 a copyright and/or license notice that predates the release of Scribus 1.3.2
 for which a new license (GPL+exception) is in place.
 */

/***************************************************************************
*                                                                         *
*   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.                                   *
*                                                                         *
***************************************************************************/



#include "canvasmode_magnifier.h"

#include <QApplication>
#include <QButtonGroup>
#include <QCheckBox>
#include <QCursor>
#include <QEvent>
#include <QMessageBox>
#include <QMouseEvent>
#include <QPainterPath>
#include <QPoint>
#include <QRect>
#include <QTimer>
#include <QWidgetAction>
#include <QDebug>

#include "appmodes.h"
#include "canvas.h"
#include "fpoint.h"
#include "fpointarray.h"
#include "iconmanager.h"
#include "pageitem_textframe.h"
#include "prefscontext.h"
#include "prefsfile.h"
#include "prefsmanager.h"
#include "scribus.h"
#include "scribusdoc.h"
#include "scribusview.h"
#include "selection.h"
#include "ui/contextmenu.h"
#include "ui/pageselector.h"
#include "ui/propertiespalette.h"
#include "undomanager.h"
#include "units.h"
#include "util.h"
#include "util_math.h"

CanvasMode_Magnifier::CanvasMode_Magnifier(ScribusView* view) : CanvasMode(view)
{
}

void CanvasMode_Magnifier::drawControls(QPainter* p)
{
        commonDrawControls(p, false);
}

void CanvasMode_Magnifier::enterEvent(QEvent *e)
{
        if (!m_canvas->m_viewMode.m_MouseButtonPressed)
                setModeCursor();
}


void CanvasMode_Magnifier::leaveEvent(QEvent *e)
{
}


void CanvasMode_Magnifier::activate(bool fromGesture)
{
//      qDebug() << "CanvasMode_Magnifier::activate" << fromGesture;
        CanvasMode::activate(fromGesture);

        m_canvas->m_viewMode.m_MouseButtonPressed = false;
        m_canvas->resetRenderMode();
        m_doc->DragP = false;
        m_doc->leaveDrag = false;
        m_canvas->m_viewMode.operItemMoving = false;
        m_canvas->m_viewMode.operItemResizing = false;
        m_view->MidButt = false;
        m_Mxp = m_Myp = -1;
        setModeCursor();
        if (fromGesture)
                m_view->update();
}

void CanvasMode_Magnifier::deactivate(bool forGesture)
{
//      qDebug() << "CanvasMode_Magnifier::deactivate" << forGesture;
        m_view->setRedrawMarkerShown(false);
        CanvasMode::deactivate(forGesture);
}

void CanvasMode_Magnifier::mouseDoubleClickEvent(QMouseEvent *m)
{
        m->accept();
        m_canvas->m_viewMode.m_MouseButtonPressed = false;
        m_canvas->resetRenderMode();
//      m_view->stopDragTimer();
}


void CanvasMode_Magnifier::mouseMoveEvent(QMouseEvent *m)
{
        const FPoint mousePointDoc = m_canvas->globalToCanvas(m->globalPos());
       
        m_lastPosWasOverGuide = false;
        m->accept();
        if (commonMouseMove(m))
                return;
        if (m_view->moveTimerElapsed() && m_canvas->m_viewMode.m_MouseButtonPressed && (m->buttons() & Qt::LeftButton))
        {
                double newX = qRound(mousePointDoc.x()); //m_view->translateToDoc(m->x(), m->y()).x());
                double newY = qRound(m_Myp + ((m_SeRx - m_Mxp) * m_view->visibleHeight()) / m_view->visibleWidth());
                m_SeRx = newX;
                m_SeRy = newY;
                QPoint startP = m_canvas->canvasToGlobal(QPointF(m_Mxp, m_Myp));
                m_view->redrawMarker->setGeometry(QRect(m_view->mapFromGlobal(startP), m_view->mapFromGlobal(m->globalPos())).normalized());
                m_view->setRedrawMarkerShown(true);
                m_view->HaveSelRect = true;
        }
}

void CanvasMode_Magnifier::mousePressEvent(QMouseEvent *m)
{
        double Rxp = 0, Ryp = 0;
        const FPoint mousePointDoc = m_canvas->globalToCanvas(m->globalPos());
       
        m_canvas->PaintSizeRect(QRect());
        m_canvas->m_viewMode.m_MouseButtonPressed = true;
        m_canvas->m_viewMode.operItemMoving = false;
        m_view->HaveSelRect = false;
        m_doc->DragP = false;
        m_doc->leaveDrag = false;
        m->accept();
        m_view->registerMousePress(m->globalPos());
        m_Mxp = mousePointDoc.x(); //qRound(m->x()/m_canvas->scale() + 0*m_doc->minCanvasCoordinate.x());
        m_Myp = mousePointDoc.y(); //qRound(m->y()/m_canvas->scale() + 0*m_doc->minCanvasCoordinate.y());
        Rxp = m_doc->ApplyGridF(FPoint(m_Mxp, m_Myp)).x();
        m_Mxp = qRound(Rxp);
        Ryp = m_doc->ApplyGridF(FPoint(m_Mxp, m_Myp)).y();
        m_Myp = qRound(Ryp);
        m_SeRx = m_Mxp;
        m_SeRy = m_Myp;
        if (m->button() == Qt::MidButton)
        {
                m_view->MidButt = true;
                if (m->modifiers() & Qt::ControlModifier)
                        m_view->DrawNew();
                return;
        }
        m_canvas->m_viewMode.m_MouseButtonPressed = true;
        if ((m->modifiers() == Qt::ShiftModifier) || (m->button() == Qt::RightButton))
        {
                m_view->Magnify = false;
                m_view->setCursor(IconManager::instance().loadCursor("lupezm.png"));
        }
        else
        {
                m_view->Magnify = true;
                m_view->setCursor(IconManager::instance().loadCursor("lupez.png"));
        }
        m_Mxp = mousePointDoc.x(); //m->globalPos().x();
        m_Myp = mousePointDoc.y(); //m->globalPos().y();
        m_SeRx = m_Mxp;
        m_SeRy = m_Myp;
        m_view->redrawMarker->setGeometry(m->globalPos().x(), m->globalPos().y(), 1, 1);
}



void CanvasMode_Magnifier::mouseReleaseEvent(QMouseEvent *m)
{
#ifdef GESTURE_FRAME_PREVIEW
        clearPixmapCache();
#endif // GESTURE_FRAME_PREVIEW
        const FPoint mousePointDoc = m_canvas->globalToCanvas(m->globalPos());
        m_canvas->m_viewMode.m_MouseButtonPressed = false;
        m_canvas->resetRenderMode();
        m->accept();

        double sc = m_canvas->scale();
        if (m_view->HaveSelRect)
        {
                QRect geom = m_view->redrawMarker->geometry().normalized();
                geom = QRect(m_view->mapToGlobal(geom.topLeft()), m_view->mapToGlobal(geom.bottomRight()));
                FPoint nx = m_canvas->globalToCanvas(QPoint(geom.x() + geom.width() / 2, geom.y() + geom.height() / 2));
                double scaleH = m_view->visibleWidth() / static_cast<double>(qMax(geom.width(), 1));
                double scaleV = m_view->visibleHeight() / static_cast<double>(qMax(geom.height(), 1));
                double scaleAdjust = qMax(0.5, qMin(scaleH, scaleV));
                m_view->zoom(nx.x(), nx.y(), m_canvas->scale() * scaleAdjust, false);
                if (sc == m_canvas->scale())
                {
                        m_view->HaveSelRect = false;
                        m_view->setRedrawMarkerShown(false);
                        m_view->requestMode(submodePaintingDone);
                }
                m_view->setRedrawMarkerShown(false);
        }
        else
        {
                int mx = qRound(mousePointDoc.x());
                int my = qRound(mousePointDoc.y());
                m_view->Magnify ? m_view->slotZoomIn(mx, my, true) : m_view->slotZoomOut(mx, my, true);
                if (sc == m_canvas->scale())
                {
                        m_view->HaveSelRect = false;
                        m_view->requestMode(submodePaintingDone);
                }
                else
                {
                        if (m->modifiers() & Qt::ShiftModifier)
                                m_view->setCursor(IconManager::instance().loadCursor("lupezm.png"));
                        else
                                m_view->setCursor(IconManager::instance().loadCursor("lupez.png"));
                }
        }

        m_canvas->setRenderModeUseBuffer(false);
        m_doc->DragP = false;
        m_doc->leaveDrag = false;
        m_canvas->m_viewMode.operItemMoving = false;
        m_canvas->m_viewMode.operItemResizing = false;
        m_view->MidButt = false;
        //Make sure the Zoom spinbox and page selector don't have focus if we click on the canvas
        m_view->m_ScMW->zoomSpinBox->clearFocus();
        m_view->m_ScMW->pageSelector->clearFocus();
}