valentina/src/libs/vwidgets/vcontrolpointspline.cpp
Roman Telezhynskyi 0f747ede7e The first implementation for tool Spline.
--HG--
branch : feature
2016-02-12 20:10:01 +02:00

269 lines
11 KiB
C++

/************************************************************************
**
** @file vcontrolpointspline.cpp
** @author Roman Telezhynskyi <dismine(at)gmail.com>
** @date November 15, 2013
**
** @brief
** @copyright
** This source code is part of the Valentine project, a pattern making
** program, whose allow create and modeling patterns of clothing.
** Copyright (C) 2013-2015 Valentina project
** <https://bitbucket.org/dismine/valentina> All Rights Reserved.
**
** Valentina 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 3 of the License, or
** (at your option) any later version.
**
** Valentina is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with Valentina. If not, see <http://www.gnu.org/licenses/>.
**
*************************************************************************/
#include "vcontrolpointspline.h"
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsView>
#include <QPen>
#include <QStyleOptionGraphicsItem>
#include "vmaingraphicsview.h"
#include "vmaingraphicsscene.h"
//---------------------------------------------------------------------------------------------------------------------
VControlPointSpline::VControlPointSpline(const qint32 &indexSpline, SplinePointPosition position, Unit patternUnit,
QGraphicsItem *parent)
:QGraphicsEllipseItem(parent),
radius(CircleRadius()),
controlLine(nullptr),
indexSpline(indexSpline),
position(position),
patternUnit(patternUnit)
{
Init();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VControlPointSpline constructor.
* @param indexSpline index spline in list.
* @param position position point in spline.
* @param controlPoint control point.
* @param splinePoint spline point.
* @param parent parent object.
*/
VControlPointSpline::VControlPointSpline(const qint32 &indexSpline, SplinePointPosition position,
const QPointF &controlPoint, const QPointF &splinePoint, Unit patternUnit,
QGraphicsItem *parent)
:QGraphicsEllipseItem(parent),
radius(CircleRadius()),
controlLine(nullptr),
indexSpline(indexSpline),
position(position),
patternUnit(patternUnit)
{
Init();
this->setFlag(QGraphicsItem::ItemIsSelectable, true);
this->setFlag(QGraphicsItem::ItemIsMovable, true);
this->setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
this->setAcceptHoverEvents(true);
this->setPos(controlPoint);
SetCtrlLine(controlPoint, splinePoint);
}
//---------------------------------------------------------------------------------------------------------------------
VControlPointSpline::~VControlPointSpline()
{
//Disable cursor-arrow-openhand
RestoreOverrideCursor(cursorArrowOpenHand);
}
//---------------------------------------------------------------------------------------------------------------------
void VControlPointSpline::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
/* From question on StackOverflow
* https://stackoverflow.com/questions/10985028/how-to-remove-border-around-qgraphicsitem-when-selected
*
* There's no interface to disable the drawing of the selection border for the build-in QGraphicsItems. The only way
* I can think of is derive your own items from the build-in ones and override the paint() function:*/
QStyleOptionGraphicsItem myOption(*option);
myOption.state &= ~QStyle::State_Selected;
QGraphicsEllipseItem::paint(painter, &myOption, widget);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief hoverEnterEvent handle hover enter events.
* @param event hover move event.
*/
void VControlPointSpline::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
this->setPen(QPen(Qt::black, ToPixel(WidthMainLine(patternUnit), patternUnit)));
SetOverrideCursor(cursorArrowOpenHand, 1, 1);
QGraphicsEllipseItem::hoverEnterEvent(event);
}
//---------------------------------------------------------------------------------------------------------------------
void VControlPointSpline::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
this->setPen(QPen(Qt::black, ToPixel(WidthHairLine(patternUnit), patternUnit)));
//Disable cursor-arrow-openhand
RestoreOverrideCursor(cursorArrowOpenHand);
QGraphicsEllipseItem::hoverLeaveEvent(event);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief itemChange handle item change.
* @param change change.
* @param value value.
* @return value.
*/
QVariant VControlPointSpline::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant &value)
{
if (change == ItemPositionChange && scene())
{
// Each time we move something we call recalculation scene rect. In some cases this can cause moving
// objects positions. And this cause infinite redrawing. That's why we wait the finish of saving the last move.
static bool changeFinished = true;
if (changeFinished)
{
changeFinished = false;
// value - new position.
QPointF newPos = value.toPointF();
emit ControlPointChangePosition(indexSpline, position, newPos);
if (scene())
{
const QList<QGraphicsView *> viewList = scene()->views();
if (not viewList.isEmpty())
{
if (QGraphicsView *view = viewList.at(0))
{
const int xmargin = 50;
const int ymargin = 50;
const QRectF viewRect = VMainGraphicsView::SceneVisibleArea(view);
const QRectF itemRect = mapToScene(boundingRect()).boundingRect();
// If item's rect is bigger than view's rect ensureVisible works very unstable.
if (itemRect.height() + 2*ymargin < viewRect.height() &&
itemRect.width() + 2*xmargin < viewRect.width())
{
view->ensureVisible(itemRect, xmargin, ymargin);
}
else
{
// Ensure visible only small rect around a cursor
VMainGraphicsScene *currentScene = qobject_cast<VMainGraphicsScene *>(scene());
SCASSERT(currentScene);
const QPointF cursorPosition = currentScene->getScenePos();
view->ensureVisible(QRectF(cursorPosition.x()-5, cursorPosition.y()-5, 10, 10));
}
}
}
}
changeFinished = true;
}
}
return QGraphicsItem::itemChange(change, value);
}
//---------------------------------------------------------------------------------------------------------------------
void VControlPointSpline::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
if (event->button() == Qt::LeftButton && event->type() != QEvent::GraphicsSceneMouseDoubleClick)
{
SetOverrideCursor(cursorArrowCloseHand, 1, 1);
}
QGraphicsEllipseItem::mousePressEvent(event);
}
//---------------------------------------------------------------------------------------------------------------------
void VControlPointSpline::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
if (event->button() == Qt::LeftButton && event->type() != QEvent::GraphicsSceneMouseDoubleClick)
{
//Disable cursor-arrow-closehand
RestoreOverrideCursor(cursorArrowCloseHand);
}
QGraphicsEllipseItem::mouseReleaseEvent(event);
}
//---------------------------------------------------------------------------------------------------------------------
void VControlPointSpline::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
{
emit ShowContextMenu(event);
}
//---------------------------------------------------------------------------------------------------------------------
void VControlPointSpline::Init()
{
auto rec = QRectF(0, 0, radius*2, radius*2);
rec.translate(-rec.center().x(), -rec.center().y());
this->setRect(rec);
this->setPen(QPen(Qt::black, ToPixel(WidthHairLine(patternUnit), patternUnit)));
this->setBrush(QBrush(Qt::NoBrush));
this->setZValue(100);
controlLine = new QGraphicsLineItem(this);
controlLine->setPen(QPen(Qt::red, ToPixel(WidthHairLine(patternUnit), patternUnit)));
controlLine->setFlag(QGraphicsItem::ItemStacksBehindParent, true);
}
//---------------------------------------------------------------------------------------------------------------------
void VControlPointSpline::SetCtrlLine(const QPointF &controlPoint, const QPointF &splinePoint)
{
QPointF p1, p2;
VGObject::LineIntersectCircle(QPointF(), radius, QLineF( QPointF(), splinePoint-controlPoint), p1, p2);
controlLine->setLine(QLineF(splinePoint-controlPoint, p1));
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief RefreshCtrlPoint refresh the control point.
* @param indexSpline index spline in list.
* @param pos position point in spline.
* @param controlPoint control point.
* @param splinePoint spline point.
*/
void VControlPointSpline::RefreshCtrlPoint(const qint32 &indexSpline, SplinePointPosition pos,
const QPointF &controlPoint, const QPointF &splinePoint)
{
if (this->indexSpline == indexSpline && this->position == pos)
{
this->setPos(controlPoint);
SetCtrlLine(controlPoint, splinePoint);
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief setEnabledPoint disable or enable control point.
* @param enable true - enable.
*/
void VControlPointSpline::setEnabledPoint(bool enable)
{
if (enable == true)
{
this->setPen(QPen(Qt::black, ToPixel(WidthHairLine(patternUnit), patternUnit)));
this->setFlag(QGraphicsItem::ItemIsSelectable, true);
this->setFlag(QGraphicsItem::ItemIsMovable, true);
this->setAcceptHoverEvents(true);
}
else
{
this->setPen(QPen(Qt::gray, ToPixel(WidthHairLine(patternUnit), patternUnit)));
this->setFlag(QGraphicsItem::ItemIsSelectable, false);
this->setFlag(QGraphicsItem::ItemIsMovable, false);
this->setAcceptHoverEvents(false);
}
}