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

#if defined(_MSC_VER) && !defined(_USE_MATH_DEFINES)
#define _USE_MATH_DEFINES
#endif
#include <cmath>

#include "canvasgesture_resize.h"

#include <QMouseEvent>
#include <QPainter>
#include <QPen>
#include <QRubberBand>

#include "pageitem_arc.h"
#include "pageitem_spiral.h"
#include "pageitem_table.h"
#include "scribus.h"
#include "scribusdoc.h"
#include "scribusview.h"
#include "selection.h"
#include "undomanager.h"
#include "util_math.h"

ResizeGesture::ResizeGesture (CanvasMode* parent) : CanvasGesture(parent)
{
	m_transaction = UndoTransaction();
}

void ResizeGesture::prepare(Canvas::FrameHandle framehandle)
{
	if (framehandle > 0)
		m_handle = framehandle;
	
	if (m_doc->m_Selection->isEmpty())
	{
		m_handle = Canvas::OUTSIDE;
		return;
	}
	if (m_doc->m_Selection->isMultipleSelection())
	{
		double ex, ey, eh, ew;
		m_doc->m_Selection->getGroupRect(&ex, &ey, &ew, &eh);
		double gx, gy, gh, gw;
		m_doc->m_Selection->getVisualGroupRect(&gx, &gy, &gw, &gh);
		m_bounds = QRectF(QPointF(gx, gy), QSizeF(gw, gh));
		m_rotation = 0.0;
		m_extraX = ex - gx;
		m_extraY = ey - gy;
		m_extraWidth = gw - ew;
		m_extraHeight = gh - eh;
	}
	else // we keep m_bounds non-rotated
	{
		PageItem* currItem = m_doc->m_Selection->itemAt(0);
		m_bounds = QRectF(-currItem->visualLineWidth() / 2.0, -currItem->visualLineWidth() / 2.0, currItem->visualWidth(), currItem->visualHeight());
		QTransform mm = currItem->getTransform();
		QPointF itPos = mm.map(QPointF(-currItem->visualLineWidth() / 2.0, -currItem->visualLineWidth() / 2.0));
		double m_scaleX, m_scaleY;
		getScaleFromMatrix(mm, m_scaleX, m_scaleY);
		QTransform m;
		m.scale(m_scaleX, m_scaleY);
		m_bounds = m.mapRect(m_bounds);
		m_bounds.moveTopLeft(itPos);
		/*if (currItem->imageFlippedH())
		{
			m_rotation = -getRotationDFromMatrix(mm) - 180.0;
			m_bounds.translate(-currItem->visualWidth() * m_scaleX, 0);
		}
		else*/
			m_rotation = -getRotationDFromMatrix(mm);
		/*if (currItem->imageFlippedV())
		{
			m_bounds.translate(0, -currItem->visualHeight() * m_scaleY);
		}*/
		currItem->OldB2 = currItem->width();
		currItem->OldH2 = currItem->height();
		m_extraWidth = currItem->visualWidth() - currItem->width();
		m_extraHeight = currItem->visualHeight() - currItem->height();
		m_extraX =  m_extraY = m_extraWidth / 2.0;
	}
	m_origRatio = m_bounds.width() / m_bounds.height();
	m_origBounds = m_bounds;
}


void ResizeGesture::clear()
{
	m_handle = Canvas::OUTSIDE;
	if (m_transaction.isStarted())
	{
		m_transaction.cancel();
		m_transaction.reset();
	}
}

void ResizeGesture::activate(bool fromGesture)
{
	CanvasGesture::activate(fromGesture);
}


void ResizeGesture::deactivate(bool forGesture)
{
	if (!forGesture)
		clear();
	CanvasGesture::deactivate(forGesture);
}

void ResizeGesture::drawControls(QPainter* p) 
{
	QColor drawColor = QApplication::palette().color(QPalette::Active, QPalette::Highlight);

	QRectF localRect = m_canvas->canvasToLocal(m_bounds.normalized());
	if (m_doc->m_Selection->isMultipleSelection())
		localRect = m_canvas->canvasToLocalF(m_bounds.normalized());

	p->save();
	if (m_rotation != 0)
	{
		p->setRenderHint(QPainter::Antialiasing);
		p->translate(localRect.x(), localRect.y());
		p->rotate(m_rotation);
		p->translate(-localRect.x(), -localRect.y());
	}
	p->setPen(QPen(drawColor, 1, Qt::SolidLine, Qt::FlatCap, Qt::MiterJoin));
	drawColor.setAlpha(64);
	p->setBrush(drawColor);
	p->drawRect(localRect);

	if (m_origBounds != m_bounds)
	{
		if (m_doc->m_Selection->count() == 1)
		{
			p->setBrush(Qt::NoBrush);
			QPen out(Qt::gray, 1.0 , Qt::SolidLine, Qt::FlatCap, Qt::MiterJoin);
			out.setCosmetic(true);
			p->setPen(out);
			PageItem *currItem = m_doc->m_Selection->itemAt(0);
			QTransform m;
			m.translate(localRect.x(), localRect.y());
			m.scale(localRect.width() / currItem->width(), localRect.height() / currItem->height());
			if (!currItem->isSpiral())
			{
				if (currItem->imageFlippedH())
				{
					m.translate(currItem->width(), 0);
					m.scale(-1, 1);
				}
				if (currItem->imageFlippedV())
				{
					m.translate(0, currItem->height());
					m.scale(1, -1);
				}
			}
			QPainterPath clip = m.map(currItem->PoLine.toQPainterPath(false));
			p->drawPath(clip);
		}
		else if (m_doc->m_Selection->isMultipleSelection())
		{
			double x, y, w, h;
			m_doc->m_Selection->getGroupRect(&x, &y, &w, &h);
			double scx = localRect.width() / w;
			double scy = localRect.height() / h;
			uint docSelectionCount = m_doc->m_Selection->count();
			if (docSelectionCount < Canvas::moveWithBoxesOnlyThreshold)
			{
				PageItem *currItem;
				for (uint a = 0; a < docSelectionCount; ++a)
				{
					currItem = m_doc->m_Selection->itemAt(a);
					if (!m_doc->Items->contains(currItem))
						continue;
					QTransform m;
					m.translate(localRect.x(), localRect.y());
					m.translate((currItem->xPos() - x) * scx, (currItem->yPos() - y) * scy);
					m.scale(scx, scy);
					if (currItem->rotation() != 0)
						m.rotate(currItem->rotation());
					QPainterPath clip = m.map(currItem->PoLine.toQPainterPath(false));
					p->drawPath(clip);
				}
			}
		}
	}
	p->restore();
}



void ResizeGesture::mouseReleaseEvent(QMouseEvent *m)
{
	adjustBounds(m);
	if (m_doc->m_Selection->count() != 0)
	{
		PageItem* currItem = m_doc->m_Selection->itemAt(0);
		if (m_bounds != m_mousePressBounds)
		{
			doResize(m->modifiers() & Qt::AltModifier);
			m_doc->setRedrawBounding(currItem);
			if (currItem->isImageFrame())
				currItem->adjustPictScale();
		}
		//add action itemResizeToMargin for right click on item`s handlers
		else if (m->button() == Qt::RightButton)
		{
			const FPoint mousePointDoc = m_canvas->globalToCanvas(m->globalPosition());
			Canvas::FrameHandle fh = m_canvas->frameHitTest(QPointF(mousePointDoc.x(),mousePointDoc.y()), currItem);
			m_doc->itemResizeToMargin(currItem, fh);
		}
		m_view->resetMousePressed();
		// necessary since mousebutton is still recorded pressed, and otherwise checkchanges() will do nothing
		// we must check changes on whole selection otherwise resize operation won't undo correctly on groups
		if (m_bounds != m_mousePressBounds)
		{
			for (int i = 0; i < m_doc->m_Selection->count(); ++i)
				m_doc->m_Selection->itemAt(i)->checkChanges();
			m_doc->invalidateRegion(m_mousePressBounds.united(m_bounds));
			m_doc->regionsChanged()->update(m_mousePressBounds.united(m_bounds));
			m_doc->changed();
			m_doc->changedPagePreview();
		}
	}
	if (m_transaction.isStarted())
	{
		m_transaction.commit();
		m_transaction.reset();
	}
	m->accept();
	m_canvas->update();
	m_view->stopGesture();
	//#12469: emit? update from selection even after resize? if removed, remove scribus.h include
	m_view->m_ScMW->setStatusBarTextSelectedItemInfo();
}


void ResizeGesture::doResize(bool scaleContent)
{
	PageItem* currItem = m_doc->m_Selection->itemAt(0);
	QString targetName = Um::SelectionGroup;
	QPixmap* targetIcon = Um::IGroup;
	if (!m_doc->m_Selection->isMultipleSelection())
	{
		targetName = currItem->getUName();
		targetIcon = currItem->getUPixmap();
	}
	if (!m_transaction)
		m_transaction = Um::instance()->beginTransaction(targetName, targetIcon, Um::Resize, "", Um::IResize);
	QRectF newBounds = m_bounds.normalized();
	double dw = (newBounds.width() - m_extraWidth) - currItem->width();
	double dh = (newBounds.height() - m_extraHeight) - currItem->height();
	double dsch = 1.0;
	double dscw = 1.0;
	if (currItem->isArc())
	{
		PageItem_Arc* item = currItem->asArc();
		if (currItem->height() != 0.0)
			dsch = item->arcHeight / currItem->height();
		if (currItem->width() != 0.0)
			dscw = item->arcWidth / currItem->width();
	}
	if (m_doc->m_Selection->isMultipleSelection())
	{
		AnchorPoint oldRotMode = m_doc->rotationMode();
		m_doc->setRotationMode ( AnchorPoint::TopLeft );
		double gx, gy, gh, gw;
		m_doc->m_Selection->getGroupRect(&gx, &gy, &gw, &gh);
		QRectF oldBounds(gx, gy, gw, gh);
		double scx = oldBounds.width() == 0? 1.0 : (newBounds.width() - m_extraWidth) / oldBounds.width();
		double scy = oldBounds.height() == 0? 1.0 : (newBounds.height() - m_extraHeight) / oldBounds.height();
		//CB #3012 only scale text in a group if alt is pressed
		if ((currItem->itemType() == PageItem::TextFrame) && scaleContent)
			m_doc->scaleGroup(scx, scy, true);
		else
			m_doc->scaleGroup(scx, scy, false);
		double dx = newBounds.x() - oldBounds.x();
		double dy = newBounds.y() - oldBounds.y();
		if (dx != 0 || dy != 0)
			m_doc->moveGroup(dx + m_extraX, dy + m_extraY);
		m_doc->setRotationMode(oldRotMode);
	}
	else
	{
		if (currItem->itemType() == PageItem::ImageFrame && scaleContent)
		{
			double divX = (currItem->width() != 0) ? currItem->width() : 1.0;
			double divY = (currItem->height() != 0) ? currItem->height() : 1.0;
			double imgScX = (newBounds.width() - m_extraWidth) / divX * currItem->imageXScale();
			double imgScY = (newBounds.height() - m_extraHeight) / divY * currItem->imageYScale();
			// The aspect ratio has been fixed, so make the modification in the direction of the larger movement.
			if (currItem->keepAspectRatio() && currItem->fitImageToFrame()) 
			{
				if (qAbs((newBounds.width() - m_extraWidth) - currItem->width()) > qAbs((newBounds.height() - m_extraHeight) - currItem->height()))
					imgScY = imgScX;
				else
					imgScX = imgScY;
			}
			currItem->setImageXYScale(imgScX, imgScY);
		}
		else if (currItem->itemType() == PageItem::ImageFrame && currItem->imageIsAvailable && !currItem->fitImageToFrame())
		{
			QTransform mm = currItem->getTransform();
			QPointF itPos = mm.map(QPointF(-m_extraX, -m_extraY));
			double dx = newBounds.x() - itPos.x();
			double dy = newBounds.y() - itPos.y();
			if (currItem->isGroupChild())
			{
				double sx, sy;
				getScaleFromMatrix(mm, sx, sy);
				dx /= sx;
				dy /= sy;
			}
			double cosa = cos(currItem->rotation() * M_PI / 180.0);
			double sina = sin(currItem->rotation() * M_PI / 180.0);
			double xoff = -(cosa*dx + sina*dy);
			if (currItem->imageFlippedH())
				xoff += (currItem->width() - (newBounds.width() - m_extraWidth));
			double yoff = -(cosa*dy - sina*dx);
			if (currItem->imageFlippedV())
				yoff += (currItem->height() - (newBounds.height() - m_extraHeight));
			if (xoff != 0.0 || yoff != 0.0)
			{
				currItem->moveImageInFrame(xoff / currItem->imageXScale(), yoff / currItem->imageYScale());
			}
		}
		// We do not want to scale the text of a linked frame
		// as it would alter text in other frames of the string
		else if ((currItem->itemType() == PageItem::TextFrame) 
					   && (currItem->nextInChain() == nullptr)
					   && (currItem->prevInChain() == nullptr)
				       && scaleContent)
		{
			double divX = (currItem->width() != 0) ? currItem->width() : 1.0;
			double divY = (currItem->height() != 0) ? currItem->height() : 1.0;
			double txtScX = (newBounds.width() - m_extraWidth) / divX;
			double txtScY = (newBounds.height() - m_extraHeight) / divY;
			if (currItem->itemText.length() != 0)
			{
				for (int aa = 0; aa < currItem->itemText.length(); ++aa)
				{
					const CharStyle& oldChStyle(currItem->itemText.charStyle(aa));
					CharStyle newChStyle;
#if 0 // hard to decide if it’s batter to scale or to change font size
					newChStyle.setScaleV(qMax(qMin(qRound(oldChStyle.scaleV()*txtScY), 4000), 100));
					newChStyle.setScaleH(qMax(qMin(qRound(oldChStyle.scaleH() * txtScX), 4000), 100));
#else
					newChStyle.setFontSize(qMax(qMin(oldChStyle.fontSize() * txtScY, 4000.0), 1.0));
					newChStyle.setScaleH(qMax(qMin(qRound(oldChStyle.scaleH() * txtScX / txtScY), 4000), 100));
#endif
					currItem->itemText.applyCharStyle(aa, 1, newChStyle);

					// We need to scale the linespacing _only once_ per paragraph.
					if ((aa == 0) 
						|| ( SpecialChars::isBreak(currItem->itemText.text(aa - 1))))
					{
						ParagraphStyle ps(currItem->itemText.paragraphStyle(aa));
						double oldLS(currItem->itemText.paragraphStyle(aa).lineSpacing());
						ps.setLineSpacing(qMax(qRound(oldLS * txtScY), 1));
						currItem->itemText.setStyle(aa,ps);
					}
				}
			}
		}
		QTransform mm = currItem->getTransform();
		QPointF itPos = mm.map(QPointF(-m_extraX, -m_extraY));
		double m_scaleX, m_scaleY;
		getScaleFromMatrix(mm, m_scaleX, m_scaleY);
		double dx = (itPos.x() - newBounds.x()) / m_scaleX;
		double dy = (itPos.y() - newBounds.y()) / m_scaleY;
		/*if (currItem->imageFlippedH())
			dx *= -1;
		if (currItem->imageFlippedV())
			dy *= -1;*/
		currItem->moveBy(-dx, -dy, true);
		currItem->setWidth(newBounds.width() / m_scaleX - m_extraWidth);
		currItem->setHeight(newBounds.height() / m_scaleY - m_extraHeight);

		/*QTransform mm1 = currItem->getTransform();
		QTransform mm2 = mm1.inverted();
		QPointF itPos = mm1.map(QPointF(-m_extraX, -m_extraY));
		double m_scaleX, m_scaleY;
		getScaleFromMatrix(mm1, m_scaleX, m_scaleY);
		QPointF newPos = mm2.map(itPos) - mm2.map(newBounds.topLeft());*/
		/*if (currItem->imageFlippedH())
			dx *= -1;
		if (currItem->imageFlippedV())
			dy *= -1;*/
		/*currItem->moveBy(-newPos.x(), -newPos.y(), true);
		currItem->setWidth(newBounds.width() / m_scaleX - m_extraWidth);
		currItem->setHeight(newBounds.height() / m_scaleY - m_extraHeight);*/

		/*if (currItem->imageFlippedH())
			currItem->moveBy(-currItem->width(), 0);
		if (currItem->imageFlippedV())
			currItem->moveBy(0, -currItem->height());*/
		currItem->updateClip();
		if (currItem->isArc())
		{
			PageItem_Arc* item = currItem->asArc();
			item->arcWidth  += dw * dscw;
			item->arcHeight += dh * dsch;
			item->recalcPath();
		}
		if (currItem->isSpiral())
		{
			PageItem_Spiral* item = currItem->asSpiral();
			item->recalcPath();
		}
		if (currItem->isTable())
			currItem->asTable()->adjustTable();
		if (currItem->isTextFrame())
			currItem->invalidateLayout();
		// rotation does not change
	}
	m_origBounds = m_bounds;
}


void ResizeGesture::mouseMoveEvent(QMouseEvent *m)
{
	adjustBounds(m);
	FPoint where = m_canvas->globalToCanvas(m->globalPosition());
	if (// directly after a create the shape of an item isn't really usable, so we fix here
		m_origBounds.width() < 20 || m_origBounds.height() < 20 ||
		// and if we resize outside of the current canvas dimensions, we need to enlarge it
		where.x() < m_doc->minCanvasCoordinate.x() || where.y() < m_doc->minCanvasCoordinate.y() ||
		where.x() > m_doc->maxCanvasCoordinate.x() || where.y() > m_doc->maxCanvasCoordinate.y())
	{
		doResize(m->modifiers() & Qt::AltModifier);
	}
	m->accept();
	QPointF point = m->globalPosition() - (m_canvas->mapToParent(QPointF(0, 0)) + m_canvas->parentWidget()->mapToGlobal(QPointF(0, 0)));
	m_view->ensureVisible(qRound(point.x()), qRound(point.y()), 20, 20);
	m_canvas->update();
	QRectF newBounds = m_bounds.normalized();
	m_canvas->displaySizeHUD(m->globalPosition(), newBounds.width() - m_extraWidth, newBounds.height() - m_extraHeight);
}



void ResizeGesture::adjustBounds(QMouseEvent *m)
{
	QTransform rotation;
	FPoint docPoint = m_canvas->globalToCanvas(m->globalPosition());

	// proportional resize
	bool constrainRatio = ((m->modifiers() & Qt::ControlModifier) != Qt::NoModifier);
	if (!constrainRatio && m_doc->m_Selection->count() == 1)
	{
		PageItem* item = m_doc->m_Selection->itemAt(0);
		if (item->aspectRatioLocked())
			constrainRatio = true;
	}

	// center resize pivot
	bool centerPivot = ((m->modifiers() & Qt::ShiftModifier) != Qt::NoModifier);

/*
	if (m_mousePressPoint == m->globalPosition())
	{
		m_bounds = m_mousePressBounds;
		return;
	}
*/
	// snap to grid	+ snap to guides
	xSnap = 0;
	ySnap = 0;
	bool isCorner = m_handle == Canvas::NORTHWEST || m_handle == Canvas::NORTHEAST 
		|| m_handle == Canvas::SOUTHWEST || m_handle == Canvas::SOUTHEAST;
	if (m_rotation == 0 || isCorner)
	{
		FPoint snappedPoint1 = applyGrid(docPoint);
		FPoint snappedPoint2 = applyGuides(snappedPoint1);

		double x = snappedPoint2.x(), y = snappedPoint2.y();
		if (x != snappedPoint1.x() && m_handle != Canvas::NORTH && m_handle != Canvas::SOUTH)
			xSnap = x;
		if (y != snappedPoint1.y() && m_handle != Canvas::EAST && m_handle != Canvas::WEST)
			ySnap = y;
//		if (m_doc->ApplyGuides(&x, &y))
//			qDebug() << "guides applied:" << snappedPoint.x() << snappedPoint.y() << "to" << x << y;
		if (m_handle == Canvas::NORTH || m_handle == Canvas::SOUTH)
			// only snap on y-axis
			docPoint = FPoint(docPoint.x(), y);
		else if (m_handle == Canvas::EAST || m_handle == Canvas::WEST)
			// only snap on x-axis
			docPoint = FPoint(x, docPoint.y());
		else 
			docPoint = FPoint(x,y);
//		qDebug() << "resize snap grid/guides:" << m->globalPosition() << "-->" << m_canvas->canvasToGlobal(docPoint);
	}
	
	// un-rotate point
	if (m_rotation != 0)
	{
		// rotate point around item position
		QRectF normalizedBounds = m_bounds.normalized();
		rotation.translate(normalizedBounds.x(), normalizedBounds.y());
		rotation.rotate(m_rotation);
		rotation.translate(-normalizedBounds.x(), -normalizedBounds.y());
//		qDebug() << "resize rotated" << m_rotation << "°" << m_bounds << rotation << ":" << point-globalBounds.topLeft() << "-->" << rotation.map(point)-globalBounds.topLeft();
		QPointF qp(docPoint.x(), docPoint.y());
		qp = rotation.inverted().map(qp);
		docPoint = FPoint(qp.x(), qp.y());
	}

	// adjust bounds vertically
	switch (m_handle)
	{
		case Canvas::NORTHWEST:
		case Canvas::NORTH:
		case Canvas::NORTHEAST:
//			qDebug() << "ResizeGesture: top to" << point.y();
			m_bounds.setTop(docPoint.y());
			break;
		case Canvas::SOUTHWEST:
		case Canvas::SOUTH:
		case Canvas::SOUTHEAST:
//			qDebug() << "ResizeGesture: bottom to" << point.y();
			m_bounds.setBottom(docPoint.y());
			break;
		default:
			break;
	}
	// adjust bounds horizontally
	switch (m_handle)
	{
		case Canvas::NORTHWEST:
		case Canvas::WEST:
		case Canvas::SOUTHWEST:
//			qDebug() << "ResizeGesture: left to" << point.x();
			m_bounds.setLeft(docPoint.x());
			break;
		case Canvas::NORTHEAST:
		case Canvas::EAST:
		case Canvas::SOUTHEAST:
//			qDebug() << "ResizeGesture: right to" << point.x();
			m_bounds.setRight(docPoint.x());
			break;
		default:
			break;
	}

	// constrain ratio
	double newRatio = double(m_bounds.width()) / double(m_bounds.height());
	if (constrainRatio && m_origRatio != newRatio)
	{
//		qDebug() << "constrain ratio:" << m_bounds << newRatio << "to" << m_origRatio; 
		int newWidth = qRound(m_bounds.height() * m_origRatio);
		int newHeight = qRound(m_bounds.width() / m_origRatio);
		switch (m_handle)
		{
			case Canvas::NORTHWEST:
				// axis: topleft + t*[origRatio, 1]    t:= y-top
				//       [x',y] = [left, top] + [(y-top)*origRatio, y-top]
				//              = [left + (y-top)*origRatio, y]
				// x < x'  => mouse is WEST, x > x'  => mouse is NORTH
				// x < left + (y-top)*origratio   <=> x - left < (y - top) * origratio
				
//				qDebug() << "NORTHWEST" << point << m_origBounds.topLeft() << m_origRatio
//				<< (point.x() - m_origBounds.left() < (point.y()-m_origBounds.top()) * m_origRatio);
				
				if (docPoint.x() - m_origBounds.left() < (docPoint.y() - m_origBounds.top()) * m_origRatio)
					m_bounds.setTop(m_bounds.top() - newHeight + m_bounds.height());
				else
					m_bounds.setLeft(m_bounds.left() - newWidth + m_bounds.width());
				break;
			case Canvas::SOUTHWEST:
				// axis: bottomleft + t*[origRatio, -1]    t:= bottom-y
				//       (x',y) = [left, bottom] + [(bottom-y)*origRatio, -bottom+y]
				//              = [left + (bottom-y)*origRatio, y]
				// x < x'  => mouse is WEST, x > x'  => mouse is SOUTH
				// x < left + (bottom-y)*origratio   <=> x - left < (bottom-y) * origratio
				
//				qDebug() << "SOUTHWEST" << point << m_origBounds.bottomLeft()  << m_origRatio
//				<< (point.x() - m_origBounds.left() < (m_origBounds.bottom() - point.y()) * m_origRatio);
				
				if (docPoint.x() - m_origBounds.left() < (m_origBounds.bottom() - docPoint.y()) * m_origRatio)
					m_bounds.setHeight(newHeight);
				else
					m_bounds.setLeft(m_bounds.left() - newWidth + m_bounds.width());
				break;
			case Canvas::NORTHEAST:
				// cf. SOUTHWEST
				if (docPoint.x() - m_origBounds.left() > (m_origBounds.bottom() - docPoint.y()) * m_origRatio)
					m_bounds.setTop(m_bounds.top() - newHeight + m_bounds.height());
				else
					m_bounds.setWidth(newWidth);
				break;
			case Canvas::SOUTHEAST:
				// cf. NORTHWEST
				if (docPoint.x() - m_origBounds.left() > (docPoint.y() - m_origBounds.top()) * m_origRatio)
					m_bounds.setHeight(newHeight);
				else
					m_bounds.setWidth(newWidth);
				break;
			case Canvas::WEST:
			case Canvas::EAST:
				// (origBounds.top + origBounds.bottom) / 2 is the horizontal axis
				// keep that fixed
				m_bounds.setTop(((m_origBounds.top() + m_origBounds.bottom()) / 2) - newHeight / 2);
				m_bounds.setHeight(newHeight);
				break;
			case Canvas::NORTH:
			case Canvas::SOUTH:
				// (origBounds.left + origBounds.right) / 2 is the vertical axis
				// keep that fixed
				m_bounds.setLeft(((m_origBounds.left() + m_origBounds.right()) / 2) - newWidth / 2);
				m_bounds.setWidth(newWidth);
				break;
			default:
				break;
		}
//		qDebug() << "constrained:" << m_bounds << double(m_bounds.width()) / m_bounds.height();
	}

	// shift key modifier
	// move around around the pivot
	if (centerPivot)
		m_bounds.moveCenter(m_origBounds.center());
	else 
	{
		// reset to original position if user releases shift button during resize
		switch (m_handle)
		{
			case Canvas::NORTHWEST:
				m_bounds.moveBottomRight(m_origBounds.bottomRight());
				break;
			case Canvas::WEST:
				m_bounds.moveRight(m_origBounds.right());
				break;
			case Canvas::SOUTHWEST:
				m_bounds.moveTopRight(m_origBounds.topRight());
				break;
			case Canvas::SOUTH:
				m_bounds.moveTop(m_origBounds.top());
				break;
			case Canvas::NORTHEAST:
				m_bounds.moveBottomLeft(m_origBounds.bottomLeft());
				break;
			case Canvas::EAST:
				m_bounds.moveLeft(m_origBounds.left());
				break;
			case Canvas::SOUTHEAST:
				m_bounds.moveTopLeft(m_origBounds.topLeft());
				break;
			default:
				break;
		}
	}

	// re-rotate: if top left has changed, then it needs rotation
	if (m_rotation != 0)
	{
		m_bounds.moveTo(rotation.map(m_bounds.topLeft()));
		// fix opposite corner to avoid aggregating rounding errors
		QPointF origFixPoint, newFixPoint;
		switch (m_handle)
		{
			case Canvas::NORTHWEST:
				origFixPoint = m_origBounds.bottomRight();
				newFixPoint = m_bounds.bottomRight();
				break;
			case Canvas::WEST:
				origFixPoint = m_origBounds.topRight() + QPointF(0, m_origBounds.height() / 2);
				newFixPoint = m_bounds.topRight() + QPointF(0, m_bounds.height() / 2);
				break;
			case Canvas::SOUTHWEST:
				origFixPoint = m_origBounds.topRight();
				newFixPoint = m_bounds.topRight();
				break;
			case Canvas::SOUTH:
				origFixPoint = m_origBounds.topLeft() + QPointF(m_origBounds.width() / 2, 0);
				newFixPoint = m_bounds.topLeft() + QPointF(m_bounds.width() / 2, 0);
				break;
			case Canvas::SOUTHEAST:
				origFixPoint = m_origBounds.topLeft();
				newFixPoint = m_bounds.topLeft();
				break;
			case Canvas::EAST:
				origFixPoint = m_origBounds.topLeft() + QPointF(0, m_origBounds.height() / 2);
				newFixPoint = m_bounds.topLeft() + QPointF(0, m_bounds.height() / 2);
				break;
			case Canvas::NORTHEAST:
				origFixPoint = m_origBounds.bottomLeft();
				newFixPoint = m_bounds.bottomLeft();
				break;
			case Canvas::NORTH:
				origFixPoint = m_origBounds.bottomLeft() + QPointF(m_origBounds.width() / 2, 0);
				newFixPoint = m_bounds.bottomLeft() + QPointF(m_bounds.width() / 2, 0);
				break;
			default:
				origFixPoint = m_origBounds.topLeft();
				newFixPoint = m_bounds.topLeft();
				break;
		}
		QRectF normalizedBounds = m_bounds.normalized();
		origFixPoint = m_origBounds.topLeft() + rotation.map(origFixPoint - m_origBounds.topLeft());
		newFixPoint = normalizedBounds.topLeft() + rotation.map(newFixPoint - normalizedBounds.topLeft());
		if (origFixPoint != newFixPoint)
			m_bounds.translate(origFixPoint - newFixPoint);
	}
}

FPoint ResizeGesture::applyGrid(const FPoint& docPoint)
{
	int pointPage;

	if (!m_doc->SnapGrid)
		return docPoint;
	FPoint snappedPoint = docPoint;

	switch (m_handle)
	{
		case Canvas::NORTHWEST:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
				snappedPoint = m_doc->ApplyGridF(docPoint);
			else
			{
				FPoint tempPoint1 = m_doc->ApplyGridF(FPoint(docPoint.x(), m_bounds.bottom()));
				FPoint tempPoint2 = m_doc->ApplyGridF(FPoint(m_bounds.right(), docPoint.y()));
				snappedPoint.setXY(tempPoint1.x(), tempPoint2.y());
			}
			break;
		case Canvas::NORTHEAST:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
				snappedPoint = m_doc->ApplyGridF(docPoint);
			else
			{
				FPoint tempPoint1 = m_doc->ApplyGridF(FPoint(docPoint.x(), m_bounds.bottom()));
				FPoint tempPoint2 = m_doc->ApplyGridF(FPoint(m_bounds.left(), docPoint.y()));
				snappedPoint.setXY(tempPoint1.x(), tempPoint2.y());
			}
			break;
		case Canvas::SOUTHWEST:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
				snappedPoint = m_doc->ApplyGridF(docPoint);
			else
			{
				FPoint tempPoint1 = m_doc->ApplyGridF(FPoint(docPoint.x(), m_bounds.top()));
				FPoint tempPoint2 = m_doc->ApplyGridF(FPoint(m_bounds.right(), docPoint.y()));
				snappedPoint.setXY(tempPoint1.x(), tempPoint2.y());
			}
			break;
		case Canvas::SOUTHEAST:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
				snappedPoint = m_doc->ApplyGridF(docPoint);
			else
			{
				FPoint tempPoint1 = m_doc->ApplyGridF(FPoint(docPoint.x(), m_bounds.top()));
				FPoint tempPoint2 = m_doc->ApplyGridF(FPoint(m_bounds.left(), docPoint.y()));
				snappedPoint.setXY(tempPoint1.x(), tempPoint2.y());
			}
			break;
		case Canvas::NORTH:
		case Canvas::SOUTH:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
				snappedPoint = m_doc->ApplyGridF(docPoint);
			else if (m_doc->OnPage(m_bounds.left(), docPoint.y()) >= 0)
			{
				FPoint tempPoint = m_doc->ApplyGridF(FPoint(m_bounds.left(), docPoint.y()));
				snappedPoint.setY(tempPoint.y());
			}
			else if (m_doc->OnPage(m_bounds.right(), docPoint.y()) >= 0)
			{
				FPoint tempPoint = m_doc->ApplyGridF(FPoint(m_bounds.right(), docPoint.y()));
				snappedPoint.setY(tempPoint.y());
			}
			break;
		case Canvas::EAST:
		case Canvas::WEST:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
				snappedPoint = m_doc->ApplyGridF(docPoint);
			else if (m_doc->OnPage(docPoint.x(), m_bounds.top()) >= 0)
			{
				FPoint tempPoint = m_doc->ApplyGridF(FPoint(docPoint.x(), m_bounds.top()));
				snappedPoint.setX(tempPoint.x());
			}
			else if (m_doc->OnPage(docPoint.x(), m_bounds.bottom()) >= 0)
			{
				FPoint tempPoint = m_doc->ApplyGridF(FPoint(docPoint.x(), m_bounds.bottom()));
				snappedPoint.setX(tempPoint.x());
			}
			break;
		default:
			snappedPoint = m_doc->ApplyGridF(docPoint);
			break;
	}

	/*double gx = snappedPoint.x(), gxo = docPoint.x();
	double gy = snappedPoint.y(), gyo = docPoint.y();
	if ((fabs(gx - gxo) > (m_doc->guidesPrefs().guideRad / m_canvas->scale())) || 
		(fabs(gy - gyo) > (m_doc->guidesPrefs().guideRad / m_canvas->scale())))
	{
		snappedPoint = docPoint;
	}*/
	return snappedPoint;
}

FPoint ResizeGesture::applyGuides(const FPoint& docPoint)
{
	int pointPage;

	if (!m_doc->SnapGuides && !m_doc->SnapItems)
		return docPoint;
	FPoint snappedPoint = docPoint;

	switch (m_handle)
	{
		case Canvas::NORTHWEST:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
			{
				m_doc->ApplyGuides(&snappedPoint);
				m_doc->ApplyGuides(&snappedPoint, true);
			}
			else
			{
				FPoint tempPoint1(docPoint.x(), m_bounds.bottom());
				m_doc->ApplyGuides(&tempPoint1);
				m_doc->ApplyGuides(&tempPoint1, true);
				FPoint tempPoint2(m_bounds.right(), docPoint.y());
				m_doc->ApplyGuides(&tempPoint2);
				m_doc->ApplyGuides(&tempPoint2, true);
				snappedPoint.setXY(tempPoint1.x(), tempPoint2.y());
			}
			break;
		case Canvas::NORTHEAST:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
			{
				m_doc->ApplyGuides(&snappedPoint);
				m_doc->ApplyGuides(&snappedPoint, true);
			}
			else
			{
				FPoint tempPoint1(docPoint.x(), m_bounds.bottom());
				m_doc->ApplyGuides(&tempPoint1);
				m_doc->ApplyGuides(&tempPoint1, true);
				FPoint tempPoint2(m_bounds.left(), docPoint.y());
				m_doc->ApplyGuides(&tempPoint2);
				m_doc->ApplyGuides(&tempPoint2, true);
				snappedPoint.setXY(tempPoint1.x(), tempPoint2.y());
			}
			break;
		case Canvas::SOUTHWEST:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
			{
				m_doc->ApplyGuides(&snappedPoint);
				m_doc->ApplyGuides(&snappedPoint, true);
			}
			else
			{
				FPoint tempPoint1(docPoint.x(), m_bounds.top());
				m_doc->ApplyGuides(&tempPoint1);
				m_doc->ApplyGuides(&tempPoint1, true);
				FPoint tempPoint2(m_bounds.right(), docPoint.y());
				m_doc->ApplyGuides(&tempPoint2);
				m_doc->ApplyGuides(&tempPoint2, true);
				snappedPoint.setXY(tempPoint1.x(), tempPoint2.y());
			}
			break;
		case Canvas::SOUTHEAST:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
			{
				m_doc->ApplyGuides(&snappedPoint);
				m_doc->ApplyGuides(&snappedPoint, true);
			}
			else
			{
				FPoint tempPoint1(docPoint.x(), m_bounds.top());
				m_doc->ApplyGuides(&tempPoint1);
				m_doc->ApplyGuides(&tempPoint1, true);
				FPoint tempPoint2(m_bounds.left(), docPoint.y());
				m_doc->ApplyGuides(&tempPoint2);
				m_doc->ApplyGuides(&tempPoint2, true);
				snappedPoint.setXY(tempPoint1.x(), tempPoint2.y());
			}
			break;
		case Canvas::NORTH:
		case Canvas::SOUTH:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
			{
				m_doc->ApplyGuides(&snappedPoint);
				m_doc->ApplyGuides(&snappedPoint, true);
			}
			else if (m_doc->OnPage(m_bounds.left(), docPoint.y()) >= 0)
			{
				FPoint tempPoint(m_bounds.left(), docPoint.y());
				m_doc->ApplyGuides(&tempPoint);
				m_doc->ApplyGuides(&tempPoint, true);
				snappedPoint.setY(tempPoint.y());
			}
			else if (m_doc->OnPage(m_bounds.right(), docPoint.y()) >= 0)
			{
				FPoint tempPoint(m_bounds.right(), docPoint.y());
				m_doc->ApplyGuides(&tempPoint);
				m_doc->ApplyGuides(&tempPoint, true);
				snappedPoint.setY(tempPoint.y());
			}
			break;
		case Canvas::EAST:
		case Canvas::WEST:
			pointPage = m_doc->OnPage(docPoint.x(), docPoint.y());
			if (pointPage >= 0)
			{
				m_doc->ApplyGuides(&snappedPoint);
				m_doc->ApplyGuides(&snappedPoint, true);
			}
			else if (m_doc->OnPage(docPoint.x(), m_bounds.top()) >= 0)
			{
				FPoint tempPoint(docPoint.x(), m_bounds.top());
				m_doc->ApplyGuides(&tempPoint);
				m_doc->ApplyGuides(&tempPoint, true);
				snappedPoint.setX(tempPoint.x());
			}
			else if (m_doc->OnPage(docPoint.x(), m_bounds.bottom()) >= 0)
			{
				FPoint tempPoint(docPoint.x(), m_bounds.bottom());
				m_doc->ApplyGuides(&tempPoint);
				m_doc->ApplyGuides(&tempPoint, true);
				snappedPoint.setX(tempPoint.x());
			}
			break;
		default:
			m_doc->ApplyGuides(&snappedPoint);
			m_doc->ApplyGuides(&snappedPoint, true);
			break;
	}

	return snappedPoint;
}

void ResizeGesture::mousePressEvent(QMouseEvent *m)
{
	FPoint point = m_canvas->globalToCanvas(m->globalPosition());
	m_mousePressPoint = m->globalPosition();
	if (m_doc->m_Selection->isEmpty())
	{
		m_handle = Canvas::OUTSIDE;
	}
	else if (m_doc->m_Selection->isMultipleSelection())
	{
		double gx, gy, gh, gw;
		m_doc->m_Selection->getVisualGroupRect(&gx, &gy, &gw, &gh);
		m_handle = m_canvas->frameHitTest(QPointF(point.x(), point.y()), QRectF(gx,gy,gw,gh));
	}
	else
	{
		m_handle = m_canvas->frameHitTest(QPointF(point.x(), point.y()), m_doc->m_Selection->itemAt(0));
		/*PageItem* currItem = m_doc->m_Selection->itemAt(0);
		if (currItem->imageFlippedH())
		{
			switch (m_handle)
			{
				case Canvas::NORTHEAST:
					m_handle = Canvas::NORTHWEST;
					break;
				case Canvas::NORTHWEST:
					m_handle = Canvas::NORTHEAST;
					break;
				case Canvas::EAST:
					m_handle = Canvas::WEST;
					break;
				case Canvas::WEST:
					m_handle = Canvas::EAST;
					break;
				case Canvas::SOUTHEAST:
					m_handle = Canvas::SOUTHWEST;
					break;
				case Canvas::SOUTHWEST:
					m_handle = Canvas::SOUTHEAST;
					break;
				default:
					break;
			}
		}
		if (currItem->imageFlippedV())
		{
			switch (m_handle)
			{
				case Canvas::NORTHEAST:
					m_handle = Canvas::SOUTHEAST;
					break;
				case Canvas::NORTHWEST:
					m_handle = Canvas::SOUTHWEST;
					break;
				case Canvas::SOUTH:
					m_handle = Canvas::NORTH;
					break;
				case Canvas::NORTH:
					m_handle = Canvas::SOUTH;
					break;
				case Canvas::SOUTHEAST:
					m_handle = Canvas::SOUTHWEST;
					break;
				case Canvas::SOUTHWEST:
					m_handle = Canvas::NORTHWEST;
					break;
				default:
					break;
			}
		}*/
	}
	if (m_handle > 0)
	{
		prepare(m_handle);
		m->accept();
		m_mousePressBounds = m_bounds;
		adjustBounds(m);
	}
}
