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qanEdgeDraggableCtrl.h
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qanEdgeDraggableCtrl.h
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/*
Copyright (c) 2008-2024, Benoit AUTHEMAN All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the author or Destrat.io nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
//-----------------------------------------------------------------------------
// This file is a part of the QuickQanava software library.
//
// \file qanEdgeDraggableCtrl.h
// \author benoit@destrat.io
// \date 2021 10 29
//-----------------------------------------------------------------------------
#pragma once
// Qt headers
#include <QQuickItem>
#include <QPointF>
#include <QPolygonF>
#include <QDrag>
#include <QPointer>
// QuickQanava headers
#include "./qanAbstractDraggableCtrl.h"
#include "./qanGroup.h"
namespace qan { // ::qan
/*! \brief Generic logic for dragging qan::Edge visual items.
*
* \nosubgrouping
*/
class EdgeDraggableCtrl : public qan::AbstractDraggableCtrl
{
/*! \name Node Object Management *///--------------------------------------
//@{
public:
//! DraggableCtrl constructor.
explicit EdgeDraggableCtrl() = default;
virtual ~EdgeDraggableCtrl() override = default;
EdgeDraggableCtrl(const EdgeDraggableCtrl&) = delete;
public:
inline auto getTarget() noexcept -> qan::Edge* { return _target.data(); }
inline auto getTarget() const noexcept -> const qan::Edge* { return _target.data(); }
inline auto setTarget(qan::Edge* target) noexcept { _target = target; }
private:
QPointer<qan::Edge> _target{nullptr};
public:
inline auto getTargetItem() noexcept -> qan::EdgeItem* { return _targetItem.data(); }
inline auto getTargetItem() const noexcept -> const qan::EdgeItem* { return _targetItem.data(); }
inline auto setTargetItem(qan::EdgeItem* targetItem) noexcept { _targetItem = targetItem; }
private:
QPointer<qan::EdgeItem> _targetItem;
protected:
//! Utility to return a safe _targetItem->getGraph().
qan::Graph* getGraph() noexcept;
//@}
//-------------------------------------------------------------------------
/*! \name Node DnD Management *///-----------------------------------------
//@{
public:
bool handleDragEnterEvent(QDragEnterEvent* event);
void handleDragMoveEvent(QDragMoveEvent* event);
void handleDragLeaveEvent(QDragLeaveEvent* event);
void handleDropEvent(QDropEvent* event);
void handleMouseDoubleClickEvent(QMouseEvent* event);
bool handleMouseMoveEvent(QMouseEvent* event);
void handleMousePressEvent(QMouseEvent* event);
void handleMouseReleaseEvent(QMouseEvent* event);
public:
//! \c dragInitialMousePos in window coordinate system.
virtual void beginDragMove(const QPointF& sceneDragPos, bool dragSelection = true, bool notify = true) override;
//! \c delta in scene coordinate system.
virtual void dragMove(const QPointF& sceneDragPos, bool dragSelection = true,
bool disableSnapToGrid = false, bool disableOrientation = false) override;
virtual void endDragMove(bool dragSelection = true, bool notify = true) override;
private:
//! Internal (mouse) initial dragging position.
QPointF _initialDragPos{0., 0.};
//! Internal (target) initial dragging position.
QPointF _initialTargetPos{0., 0.};
//@}
//-------------------------------------------------------------------------
};
} // ::qan