fabricGrainMeter.cpp

/*
 * Fabric Granular Audio Effect
 * Copyright (C) 2021 Alexander Waite Mitchell <alex.w.mitchell@gmail.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for any purpose with
 * or without fee is hereby granted, provided that the above copyright notice and this
 * permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
 * TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include "fabricGrainMeter.hpp"
#include "DistrhoPluginInfo.h"
#include "fabricUI.hpp"
#include <iostream>

START_NAMESPACE_DISTRHO

fabricGrainMeter::fabricGrainMeter(Widget *widget, Size<uint> size) noexcept
    : NanoSubWidget(widget)
{
    setSize(size); 
    m_grainPlayer = &static_cast<fabricUI *>(widget)->_plugin->grainPlayer;

    grainsActiveHistory.resize(200);
}

void fabricGrainMeter::onNanoDisplay()
{
    //draw black widget background
    static const Color k_black(0, 0, 0, 1);
    beginPath();
    rect(0.0f, 0.0f, getWidth(), getHeight());
    fillColor(k_black);
    fill();

    //get the current grains used count
    grainsActiveHistory.push_back(m_grainPlayer->grains_used.size());
    grainsActiveHistory.pop_front();

    //draw the grain meter
    strokeWidth(1.f);
    beginPath();
    strokeColor(Color(173, 216, 230, 255)); //FIXME (alex) make this an enum
    int pos = 0;
    for (auto grainsActive : grainsActiveHistory){
        moveTo(pos, getHeight());
        lineTo(pos, getHeight() - ((float)grainsActive / MAX_GRAINS) * getHeight());
        pos++;
    }
    stroke();

    //overlay a gradient ontop of the graph
    static const Color k_semiTransparent(0, 0, 0, .8);
    static const Color k_transparent(0, 0, 0, 0);
    beginPath();
    rect(0.0f, 0.0f, getWidth(), getHeight());
    Paint gradient = linearGradient(0, 0, getWidth(), 0, k_semiTransparent, k_transparent);
    fillPaint(gradient);
    fill();

}

END_NAMESPACE_DISTRHO