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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#pragma once
#include "transitionwarningitem.h"
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsTextItem>
#include <QKeyEvent>
#include <QPen>
#include <QPointF>
#include <QPolygon>
#include <QRectF>
#include <QVector>
namespace ScxmlEditor {
namespace PluginInterface {
class CornerGrabberItem;
class TagTextItem;
class ConnectableItem;
/**
* @brief The TransitionItem class provides the item to connect two Connectable-items.
*/
class TransitionItem : public BaseItem
{
Q_OBJECT
public:
explicit TransitionItem(BaseItem *parent = nullptr);
~TransitionItem() override;
enum TransitionTargetType {
InternalSameTarget = 0,
InternalNoTarget,
ExternalNoTarget,
ExternalTarget
};
enum TransitionPoint {
Start = 0,
End
};
/**
* @brief type - return tye type of the item.
*/
int type() const override
{
return TransitionType;
}
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
bool sceneEventFilter(QGraphicsItem *watched, QEvent *event) override;
void disconnectItem(ConnectableItem *item);
void setStartItem(ConnectableItem *item);
void setEndItem(ConnectableItem *item);
void startTransitionFrom(ConnectableItem *item, const QPointF &mouseScenePos);
void setEndPos(const QPointF &endPos, bool snap = true);
void connectToTopItem(const QPointF &pos, TransitionPoint p, ItemType targetType);
bool isStartItem(const ConnectableItem *item) const;
bool isEndItem(const ConnectableItem *item) const;
ConnectableItem *connectedItem(const ConnectableItem *other) const;
bool hasStartItem() const;
bool hasEndItem() const;
void init(ScxmlTag *tag, BaseItem *parentItem = nullptr, bool initChildren = true, bool blockUpdates = false) override;
void updateEditorInfo(bool allChilds = true) override;
void updateAttributes() override;
void updateTarget();
void finalizeCreation() override;
void checkVisibility(double scaleFactor) override;
bool containsScenePoint(const QPointF &p) const override;
void updateUIProperties() override;
void updateTargetType();
void setTag(ScxmlTag *tag) override;
qreal textWidth() const;
QRectF wholeBoundingRect() const;
TransitionTargetType targetType() const
{
return m_targetType;
}
void grabMouse(ItemType targetType);
void storeGeometry(bool block = false);
void storeValues(bool block = false);
void updateComponents();
void textItemPositionChanged();
protected:
void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
void keyPressEvent(QKeyEvent *event) override;
void updateToolTip();
void readUISpecifiedProperties(const ScxmlTag *tag) override;
void checkSelectionBeforeContextMenu(QGraphicsSceneMouseEvent *e) override;
void createContextMenu(QMenu *menu) override;
void selectedMenuAction(const QAction *action) override;
private:
void textHasChanged(const QString &text);
void checkWarningItems();
void storeMovePoint(bool block = false);
void storeTargetFactors(bool block = false);
void updateZValue();
void removeUnnecessaryPoints();
void findEndItem();
void updateEventName();
void createGrabbers();
void removeGrabbers();
void updateGrabberPositions();
void removeTransition(TransitionPoint p);
void snapToAnyPoint(int index, const QPointF &newPoint, int diff = 8);
void snapPointToPoint(int index, const QPointF &newPoint, int diff = 8);
QPointF loadPoint(const QString &name);
void savePoint(const QPointF &p, const QString &name);
QPointF calculateTargetFactor(ConnectableItem *item, const QPointF &pos);
QPointF sceneTargetPoint(TransitionPoint p);
QPointF findIntersectionPoint(ConnectableItem *item, const QLineF &line, const QPointF &defaultPoint);
QVector<CornerGrabberItem*> m_cornerGrabbers;
CornerGrabberItem *m_selectedCornerGrabber = nullptr;
QPolygonF m_cornerPoints;
ConnectableItem *m_startItem = nullptr;
ConnectableItem *m_oldStartItem = nullptr;
ConnectableItem *m_endItem = nullptr;
QPolygonF m_arrow;
qreal m_arrowSize = 10;
qreal m_arrowAngle;
QPen m_pen;
QPen m_highlightPen;
bool m_lineSelected = false;
TagTextItem *m_eventTagItem;
TransitionWarningItem *m_warningItem = nullptr;
TransitionTargetType m_targetType = ExternalTarget;
bool m_movingFirstPoint = false;
bool m_movingLastPoint = false;
bool m_mouseGrabbed = false;
ItemType m_grabbedTargetType = UnknownType;
int m_selectedGrabberIndex = -1;
QPointF m_startTargetFactor;
QPointF m_endTargetFactor;
};
} // namespace PluginInterface
} // namespace ScxmlEditor
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