JUCE/modules/juce_gui_extra/misc/juce_AnimatedAppComponent.cpp

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

   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
{

AnimatedAppComponent::AnimatedAppComponent()
{
    setOpaque (true);
}

void AnimatedAppComponent::setFramesPerSecond (int framesPerSecondIn)
{
    jassert (0 < framesPerSecond && framesPerSecond < 1000);
    framesPerSecond = framesPerSecondIn;
    updateSync();
}

void AnimatedAppComponent::updateSync()
{
    if (useVBlank)
    {
        stopTimer();

        if (vBlankAttachment.isEmpty())
            vBlankAttachment = { this, [this] { timerCallback(); } };
    }
    else
    {
        vBlankAttachment = {};

        const auto interval = 1000 / framesPerSecond;

        if (getTimerInterval() != interval)
            startTimer (interval);
    }
}

void AnimatedAppComponent::setSynchroniseToVBlank (bool syncToVBlank)
{
    useVBlank = syncToVBlank;
    updateSync();
}

int AnimatedAppComponent::getMillisecondsSinceLastUpdate() const noexcept
{
    return (int) (Time::getCurrentTime() - lastUpdateTime).inMilliseconds();
}

void AnimatedAppComponent::timerCallback()
{
    ++totalUpdates;
    update();
    repaint();
    lastUpdateTime = Time::getCurrentTime();
}

} // namespace juce