JUCE/modules/juce_gui_basics/detail/juce_ViewportHelpers.h

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.

   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy

   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce::detail
{

struct ViewportHelpers
{
    ViewportHelpers() = delete;

    static bool wouldScrollOnEvent (const Viewport* vp, const MouseInputSource& src)
    {
        if (vp != nullptr)
        {
            switch (vp->getScrollOnDragMode())
            {
                case Viewport::ScrollOnDragMode::all:           return true;
                case Viewport::ScrollOnDragMode::nonHover:      return ! src.canHover();
                case Viewport::ScrollOnDragMode::never:         return false;
            }
        }

        return false;
    }
};

} // namespace juce::detail