path: root/slideshow/source/inc/usereventqueue.hxx

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_USEREVENTQUEUE_HXX
#define INCLUDED_SLIDESHOW_SOURCE_INC_USEREVENTQUEUE_HXX

#include <com/sun/star/animations/XAnimationNode.hpp>

#include "eventmultiplexer.hxx"
#include "eventqueue.hxx"
#include "shape.hxx"

/* Definition of UserEventQueue class */

namespace slideshow {
namespace internal {

class AllAnimationEventHandler;
class ShapeClickEventHandler;
class ClickEventHandler;
class CursorManager;
class SkipEffectEventHandler;
class RewindEffectEventHandler;
class MouseEnterHandler;
class MouseLeaveHandler;

/** This class schedules user-activated events.

    This class registers at the EventMultiplexer and fires
    events registered for certain user actions. Note that all
    events will not be fired immediately after the user action
    occurred, but always added to the EventQueue (and fired the
    next time that queue is processed). Which is actually a
    feature.

    Conceptually, an event is an object that typically is
    fired only once. After that, the event is exhausted, and
    should be discarded. Therefore, all events registered on
    this object are fired and then all references to them are
    removed.
*/
class UserEventQueue
{
public:
    /** Create a user event queue

        @param rEventMultiplexer
        The slideshow-global event source, where this class
        registers its event handlers.

        @param rEventQueue
        Reference to the main event queue. Since we hold this
        object by plain reference, it must live longer than we
        do. On the other hand, that queue must not fire events
        after this object is destroyed, since we might
        schedule events there which itself contain plain
        references to this object. Basically, EventQueue and
        UserEventQueue should have the same lifetime, and since
        this is not possible, both must be destructed in a
        phased mode: first clear both of any remaining events,
        then destruct them.
    */
    UserEventQueue( EventMultiplexer&   rMultiplexer,
                    EventQueue&         rEventQueue,
                    CursorManager&      rCursorManager );
    ~UserEventQueue();
    UserEventQueue(const UserEventQueue&) = delete;
    UserEventQueue& operator=(const UserEventQueue&) = delete;

    /** Clear all registered events.

        This method clears all registered, but
        not-yet-executed events. This comes in handy when
        force-ending a slide, to avoid interference with the
        next slide's event registration.
    */
    void clear();

    /** Set advance on click behaviour.

        @param bAdvanceOnClick
        When true, a click somewhere on the slide will also
        generate next effect event.  In this case, it is
        irrelevant where on the slide the mouse is clicked,
        i.e. the shape need not be hit by the mouse.
    */
    void setAdvanceOnClick( bool bAdvanceOnClick );

    /** Register an event that will be fired when the given
        animation node starts.

        Note that <em>all</em> registered events will be fired
        when the animation start occurs. This is in contrast to
        the mouse events below.
    */
    void registerAnimationStartEvent(
        const EventSharedPtr&                             rEvent,
        const css::uno::Reference<css::animations::XAnimationNode>&    xNode );

    /** Register an event that will be fired when the given
        animation node ends its active duration.

        Note that <em>all</em> registered events will be fired
        when the animation end occurs. This is in contrast to
        the mouse events below.
    */
    void registerAnimationEndEvent(
        const EventSharedPtr&                               rEvent,
        const css::uno::Reference<css::animations::XAnimationNode>&      xNode );

    /** Register an event that will be fired when audio output
        stopped for the given animation node.

        Note that <em>all</em> registered events will be fired
        when the audio stopping occurs. This is in contrast to
        the mouse events below.
    */
    void registerAudioStoppedEvent(
        const EventSharedPtr&                               rEvent,
        const css::uno::Reference<css::animations::XAnimationNode>&      xNode );

    /** Register an event that is fired when a shape is clicked

        For every mouse click, only one of the events
        registered here is fired. The order of fired events is
        the order of registration, i.e. the first event
        registered will be the one fired for the first mouse
        click on the given shape.
    */
    void registerShapeClickEvent( const EventSharedPtr& rEvent,
                                  const ShapeSharedPtr& rShape );

    /** Registers an event that is fired when the current effects(s)
        are skipped, .e.g. when the left mouse button is pressed.
        Then, all registered events are fired and removed from this
        queue.  After firing, a next effect event is issued to this
        queue to start the next effect.
        @param pEvent
            The event to execute when skipping the current effect.
        @param bSkipTriggersNextEffect
            When <TRUE/> then after skipping the current effect the next
            effect is triggered.  When <FALSE/> then the next effect is not
            triggered.
    */
    void registerSkipEffectEvent(
        EventSharedPtr const& pEvent,
        const bool bSkipTriggersNextEffect);

    /** Register an event that is fired to show the next event

        For every next effect event, only one of the events
        registered here is fired. The order of fired events is
        the order of registration, i.e. the first event
        registered will be the one fired for the first mouse
        click. When advance-on-click (see method
        setAdvanceOnClick()) is enabled, a mouse click
        somewhere on the slide will also generate a next
        effect event. In this case, it is irrelevant where on
        the slide the mouse is clicked, i.e. the shape need
        not be hit by the mouse.
    */
    void registerNextEffectEvent( const EventSharedPtr& rEvent );

    /** Register an event that is fired on a double mouse
        click on a shape

        For every mouse double click, only one of the events
        registered here is fired. The order of fired events is
        the order of registration, i.e. the first event
        registered will be the one fired for the first mouse
        double click. It is irrelevant where on the slide the
        mouse is clicked, i.e. the shape need not be hit by
        the mouse.
    */
    void registerShapeDoubleClickEvent( const EventSharedPtr& rEvent,
                                        const ShapeSharedPtr& rShape );

    /** Register an event that is fired when the mouse enters
        the area of the given shape

        For every enter, only one of the events registered
        here is fired. The order of fired events is the order
        of registration, i.e. the first event registered will
        be the one fired for the first time the mouse enters
        the given shape.
    */
    void registerMouseEnterEvent( const EventSharedPtr& rEvent,
                                  const ShapeSharedPtr& rShape );

    /** Register an event that is fired when the mouse leaves
        the area of the given shape

        For every leave, only one of the events registered
        here is fired. The order of fired events is the order
        of registration, i.e. the first event registered will
        be the one fired for the first time the mouse leaves
        the given shape area.
    */
    void registerMouseLeaveEvent( const EventSharedPtr& rEvent,
                                  const ShapeSharedPtr& rShape );

    /** Typically skipping the current effect is triggered by mouse clicks
        or key presses that trigger the next effect.  This method allows the
        skipping of effects to be triggered programmatically.
    */
    void callSkipEffectEventHandler();

private:
    /** Generically register an event on one of the handlers.

        If the handler is not yet created, do that and
        register it via the Functor
    */
    template< typename Handler, typename Functor >
    void registerEvent( ::std::shared_ptr< Handler >& rHandler,
                        const EventSharedPtr&           rEvent,
                        const Functor&                  rRegistrationFunctor );

    /** Generically register an event on one of the handlers.

        If the handler is not yet created, do that and
        register it via the Functor. This version of the
        registerEvent method takes an additional parameter
        rArg, which is passed as the second argument to
        rHandler's addEvent() method.
    */
    template< typename Handler, typename Arg, typename Functor >
    void registerEvent( ::std::shared_ptr< Handler >& rHandler,
                        const EventSharedPtr&           rEvent,
                        const Arg&                      rArg,
                        const Functor&                  rRegistrationFunctor );

    EventMultiplexer&                               mrMultiplexer;
    EventQueue&                                     mrEventQueue;
    CursorManager&                                  mrCursorManager;

    ::std::shared_ptr<AllAnimationEventHandler>   mpAnimationStartEventHandler;
    ::std::shared_ptr<AllAnimationEventHandler>   mpAnimationEndEventHandler;
    ::std::shared_ptr<AllAnimationEventHandler>   mpAudioStoppedEventHandler;
    ::std::shared_ptr<ShapeClickEventHandler>     mpShapeClickEventHandler;
    ::std::shared_ptr<ClickEventHandler>          mpClickEventHandler;
    ::std::shared_ptr<SkipEffectEventHandler>     mpSkipEffectEventHandler;
    ::std::shared_ptr<ShapeClickEventHandler>     mpShapeDoubleClickEventHandler;
    ::std::shared_ptr<MouseEnterHandler>          mpMouseEnterHandler;
    ::std::shared_ptr<MouseLeaveHandler>          mpMouseLeaveHandler;

    bool                                            mbAdvanceOnClick;
};

} // namespace internal
} // namespace presentation

#endif // INCLUDED_SLIDESHOW_SOURCE_INC_USEREVENTQUEUE_HXX

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */