140 lines
3.5 KiB
C++
140 lines
3.5 KiB
C++
/*
|
|
This file is part of KDDockWidgets.
|
|
|
|
SPDX-FileCopyrightText: 2019-2020 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
|
|
Author: Sérgio Martins <sergio.martins@kdab.com>
|
|
|
|
SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
|
|
|
|
Contact KDAB at <info@kdab.com> for commercial licensing options.
|
|
*/
|
|
|
|
#ifndef KD_DRAGCONTROLLER_P_H
|
|
#define KD_DRAGCONTROLLER_P_H
|
|
|
|
#include "TitleBar_p.h"
|
|
#include "WindowBeingDragged_p.h"
|
|
|
|
#include <QStateMachine>
|
|
#include <QPoint>
|
|
#include <memory>
|
|
|
|
namespace KDDockWidgets {
|
|
|
|
class StateBase;
|
|
class DropArea;
|
|
class Draggable;
|
|
class FallbackMouseGrabber;
|
|
|
|
class DragController : public QStateMachine
|
|
{
|
|
Q_OBJECT
|
|
public:
|
|
enum State {
|
|
State_None = 0,
|
|
State_PreDrag,
|
|
State_Dragging
|
|
};
|
|
Q_ENUM(State)
|
|
|
|
static DragController *instance();
|
|
|
|
// Registers something that wants to be able to be dragged
|
|
void registerDraggable(Draggable *);
|
|
void unregisterDraggable(Draggable *);
|
|
|
|
bool isDragging() const;
|
|
bool isInNonClientDrag() const;
|
|
bool isInClientDrag() const;
|
|
|
|
void grabMouseFor(QWidgetOrQuick *);
|
|
void releaseMouse(QWidgetOrQuick *);
|
|
|
|
FloatingWindow *windowBeingDragged() const;
|
|
|
|
/// Experimental, internal, not for general use.
|
|
void enableFallbackMouseGrabber();
|
|
|
|
Q_SIGNALS:
|
|
void mousePressed();
|
|
void manhattanLengthMove();
|
|
void dragCanceled();
|
|
void dropped();
|
|
|
|
protected:
|
|
bool eventFilter(QObject *, QEvent *) override;
|
|
|
|
private:
|
|
friend class StateBase;
|
|
friend class StateNone;
|
|
friend class StatePreDrag;
|
|
friend class StateDragging;
|
|
friend class StateDropped;
|
|
|
|
DragController(QObject * = nullptr);
|
|
StateBase *activeState() const;
|
|
WidgetType *qtTopLevelUnderCursor() const;
|
|
DropArea *dropAreaUnderCursor() const;
|
|
Draggable *draggableForQObject(QObject *o) const;
|
|
QPoint m_pressPos;
|
|
QPoint m_offset;
|
|
|
|
Draggable::List m_draggables;
|
|
Draggable *m_draggable = nullptr;
|
|
std::unique_ptr<WindowBeingDragged> m_windowBeingDragged;
|
|
DropArea *m_currentDropArea = nullptr;
|
|
bool m_nonClientDrag = false;
|
|
FallbackMouseGrabber *m_fallbackMouseGrabber = nullptr;
|
|
};
|
|
|
|
class StateBase : public QState
|
|
{
|
|
Q_OBJECT
|
|
public:
|
|
explicit StateBase(DragController *parent);
|
|
~StateBase();
|
|
|
|
// Not using QEvent here, to abstract platform differences regarding production of such events
|
|
virtual bool handleMouseButtonPress(Draggable * /*receiver*/, QPoint /*globalPos*/, QPoint /*pos*/) { return false; }
|
|
virtual bool handleMouseMove(QPoint /*globalPos*/) { return false; }
|
|
virtual bool handleMouseButtonRelease(QPoint /*globalPos*/) { return false; }
|
|
|
|
DragController *const q;
|
|
};
|
|
|
|
class StateNone : public StateBase
|
|
{
|
|
Q_OBJECT
|
|
public:
|
|
explicit StateNone(DragController *parent);
|
|
~StateNone() override;
|
|
void onEntry(QEvent *) override;
|
|
bool handleMouseButtonPress(Draggable *draggable, QPoint globalPos, QPoint pos) override;
|
|
};
|
|
|
|
class StatePreDrag : public StateBase
|
|
{
|
|
Q_OBJECT
|
|
public:
|
|
explicit StatePreDrag(DragController *parent);
|
|
~StatePreDrag() override;
|
|
void onEntry(QEvent *) override;
|
|
bool handleMouseMove(QPoint globalPos) override;
|
|
bool handleMouseButtonRelease(QPoint) override;
|
|
};
|
|
|
|
class StateDragging : public StateBase
|
|
{
|
|
Q_OBJECT
|
|
public:
|
|
explicit StateDragging(DragController *parent);
|
|
~StateDragging() override;
|
|
void onEntry(QEvent *) override;
|
|
bool handleMouseButtonRelease(QPoint globalPos) override;
|
|
bool handleMouseMove(QPoint globalPos) override;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|