SlsVisibleAreaManager.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * 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
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#pragma once
 
#include <model/SlsSharedPageDescriptor.hxx>
#include <optional>
#include <tools/gen.hxx>
#include <vector>
 
namespace sd::slidesorter
{
class SlideSorter;
}
 
namespace sd::slidesorter::controller
{
class VisibleAreaManager
{
public:
    explicit VisibleAreaManager(SlideSorter& rSlideSorter);
    ~VisibleAreaManager();
    VisibleAreaManager(const VisibleAreaManager&) = delete;
    VisibleAreaManager& operator=(const VisibleAreaManager&) = delete;
 
    void ActivateCurrentSlideTracking();
    void DeactivateCurrentSlideTracking();
    bool IsCurrentSlideTrackingActive() const { return mbIsCurrentSlideTrackingActive; }
 
    void RequestCurrentSlideVisible();
 
    void RequestVisible(const model::SharedPageDescriptor& rpDescriptor, const bool bForce = false);
 
    class TemporaryDisabler
    {
    public:
        explicit TemporaryDisabler(SlideSorter const& rSlideSorter);
        ~TemporaryDisabler();
 
    private:
        VisibleAreaManager& mrVisibleAreaManager;
    };
 
private:
    SlideSorter& mrSlideSorter;
 
    ::std::vector<::tools::Rectangle> maVisibleRequests;
 
    Point maRequestedVisibleTopLeft;
    bool mbIsCurrentSlideTrackingActive;
    int mnDisableCount;
 
    void MakeVisible();
    ::std::optional<Point> GetRequestedTopLeft() const;
};
 
} // end of namespace ::sd::slidesorter::view
 
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