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https://invent.kde.org/graphics/okular
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![Tobias Deiminger](/assets/img/avatar_default.png)
Prevent MouseAnnotation from accessing PageViewItem widgets any longer after PageView deletes them in PageView::notifySetup(). BUGS: 378696 REVIEW: 130087
168 lines
6.2 KiB
C++
168 lines
6.2 KiB
C++
/***************************************************************************
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* Copyright (C) 2017 by Tobias Deiminger <haxtibal@t-online.de> *
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* Copyright (C) 2004-2005 by Enrico Ros <eros.kde@email.it> *
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* Copyright (C) 2004-2006 by Albert Astals Cid <aacid@kde.org> *
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* *
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* With portions of code from kpdf/kpdf_pagewidget.cc by: *
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* Copyright (C) 2002 by Wilco Greven <greven@kde.org> *
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* Copyright (C) 2003 by Christophe Devriese *
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* <Christophe.Devriese@student.kuleuven.ac.be> *
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* Copyright (C) 2003 by Laurent Montel <montel@kde.org> *
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* Copyright (C) 2003 by Dirk Mueller <mueller@kde.org> *
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* Copyright (C) 2004 by James Ots <kde@jamesots.com> *
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* Copyright (C) 2011 by Jiri Baum - NICTA <jiri@baum.com.au> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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***************************************************************************/
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#ifndef _OKULAR_PAGEVIEWMOUSEANNOTATION_H_
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#define _OKULAR_PAGEVIEWMOUSEANNOTATION_H_
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#include <qobject.h>
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#include "pageviewutils.h"
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#include "core/annotations.h"
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class QHelpEvent;
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class QPainter;
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class QPoint;
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class PageView;
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class PageViewItem;
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class AnnotationDescription;
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namespace Okular
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{
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class Document;
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}
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/* This class shall help to keep data for one annotation consistent. */
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class AnnotationDescription
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{
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public:
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AnnotationDescription()
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: annotation( 0 ), pageViewItem( 0 ), pageNumber( 0 ) {}
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AnnotationDescription( PageViewItem * newPageViewItem, const QPoint& eventPos );
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bool isValid() const;
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void invalidate();
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bool operator==( const AnnotationDescription & rhs ) const
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{
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return ( annotation == rhs.annotation );
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}
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Okular::Annotation * annotation;
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PageViewItem * pageViewItem;
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int pageNumber;
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};
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/**
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* @short Handle UI for annotation interactions, like moving, resizing and triggering actions.
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*
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* An object of this class tracks which annotation is currently under the mouse cursor.
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* Some annotation types can be focused in order to move or resize them.
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* State is determined from mouse and keyboard events, which are forwarded from the parent PageView object.
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* Move and resize actions are dispatched to the Document object.
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*/
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class MouseAnnotation : public QObject
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{
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Q_OBJECT
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public:
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MouseAnnotation( PageView * parent, Okular::Document * document );
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~MouseAnnotation();
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/* Process a mouse press event. eventPos: Mouse position in content area coordinates. */
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void routeMousePressEvent( PageViewItem * pageViewItem, const QPoint & eventPos );
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/* Process a mouse release event. */
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void routeMouseReleaseEvent();
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/* Process a mouse move event. eventPos: Mouse position in content area coordinates. */
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void routeMouseMoveEvent( PageViewItem * pageViewItem, const QPoint & eventPos, bool leftButtonPressed );
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/* Process a key event. */
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void routeKeyPressEvent( const QKeyEvent * e );
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/* Process a tooltip event. eventPos: Mouse position in content area coordinates. */
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void routeTooltipEvent( const QHelpEvent * helpEvent );
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/* Process a paint event. */
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void routePaint( QPainter * painter, const QRect & paintRect );
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/* Cancel the current selection or action, if any. */
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void cancel();
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/* Reset to initial state. Cancel current action and relinquish references to PageViewItem widgets. */
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void reset();
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Okular::Annotation * annotation() const;
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/* Return true, if MouseAnnotation demands control for a mouse click on the current cursor position. */
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bool isMouseOver() const;
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bool isActive() const;
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bool isFocused() const;
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bool isMoved() const;
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bool isResized() const;
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bool isModified() const;
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Qt::CursorShape cursor() const;
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enum MouseAnnotationState {
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StateInactive,
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StateFocused,
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StateMoving,
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StateResizing
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};
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enum ResizeHandleFlag {
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RH_None = 0,
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RH_Top = 1,
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RH_Right = 2,
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RH_Bottom = 4,
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RH_Left = 8,
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RH_TopLeft = RH_Top | RH_Left,
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RH_BottomLeft = RH_Bottom | RH_Left,
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RH_TopRight = RH_Top | RH_Right,
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RH_BottomRight = RH_Bottom | RH_Right,
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RH_Content = 16,
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RH_AllHandles = RH_Top | RH_Right | RH_Bottom | RH_Left
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};
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Q_DECLARE_FLAGS( ResizeHandle, ResizeHandleFlag )
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private:
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void setState( MouseAnnotationState state, const AnnotationDescription & ad );
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QRect getFullBoundingRect( const AnnotationDescription & ad ) const;
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void performCommand( const QPoint & newPos );
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void finishCommand();
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void updateViewport( const AnnotationDescription & ad ) const;
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ResizeHandle getHandleAt( const QPoint & eventPos, const AnnotationDescription & ad ) const;
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QRect getHandleRect( ResizeHandle handle, const AnnotationDescription & ad ) const;
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static void handleToAdjust( const QPointF & dIn, QPointF & dOut1, QPointF & dOut2, MouseAnnotation::ResizeHandle handle, Okular::Rotation rotation );
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static QPointF rotateInRect( const QPointF & rotated, Okular::Rotation rotation );
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static ResizeHandle rotateHandle( ResizeHandle handle, Okular::Rotation rotation );
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void processAction( const AnnotationDescription& ad );
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/* We often have to delegate to the document model and our parent widget. */
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Okular::Document * m_document;
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PageView * m_pageView;
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/* Remember which annotation is currently focused/modified. */
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MouseAnnotationState m_state;
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MouseAnnotation::ResizeHandle m_handle;
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AnnotationDescription m_focusedAnnotation;
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/* Mouse tracking, always kept up to date with the latest mouse position and annotation under mouse cursor. */
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AnnotationDescription m_mouseOverAnnotation;
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QPoint m_mousePosition; // in page view item coordinates
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QList<ResizeHandle> m_resizeHandleList;
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};
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#endif
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