JUCE/examples/BLOCKS/BlocksDrawing/Source/MainComponent.cpp

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

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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 5 End-User License
   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
   27th April 2017).

   End User License Agreement: www.juce.com/juce-5-licence
   Privacy Policy: www.juce.com/juce-5-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.

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

#include "MainComponent.h"

MainComponent::MainComponent()
{
    activeLeds.clear();

    // Register MainContentComponent as a listener to the PhysicalTopologySource object
    topologySource.addListener (this);

    infoLabel.setText ("Connect a Lightpad Block to draw.", dontSendNotification);
    infoLabel.setJustificationType (Justification::centred);
    addAndMakeVisible (infoLabel);

    addAndMakeVisible (lightpadComponent);
    lightpadComponent.setVisible (false);
    lightpadComponent.addListener (this);

    clearButton.setButtonText ("Clear");
    clearButton.addListener (this);
    clearButton.setAlwaysOnTop (true);
    addAndMakeVisible (clearButton);

    brightnessSlider.setRange (0.0, 1.0);
    brightnessSlider.setValue (1.0);
    brightnessSlider.setAlwaysOnTop (true);
    brightnessSlider.setTextBoxStyle (Slider::TextEntryBoxPosition::NoTextBox, false, 0, 0);
    brightnessSlider.addListener (this);
    addAndMakeVisible (brightnessSlider);

    brightnessLED.setAlwaysOnTop (true);
    brightnessLED.setColour (layout.currentColour.withBrightness (static_cast<float> (brightnessSlider.getValue())));
    addAndMakeVisible (brightnessLED);

   #if JUCE_IOS
    connectButton.setButtonText ("Connect");
    connectButton.addListener (this);
    connectButton.setAlwaysOnTop (true);
    addAndMakeVisible (connectButton);
   #endif

    setSize (600, 600);
}

MainComponent::~MainComponent()
{
    if (activeBlock != nullptr)
        detachActiveBlock();

    lightpadComponent.removeListener (this);
}

void MainComponent::resized()
{
    infoLabel.centreWithSize (getWidth(), 100);

    auto bounds = getLocalBounds().reduced (20);

    // top buttons
    auto topButtonArea = bounds.removeFromTop (getHeight() / 20);

    topButtonArea.removeFromLeft (20);
    clearButton.setBounds (topButtonArea.removeFromLeft (80));

   #if JUCE_IOS
    topButtonArea.removeFromRight (20);
    connectButton.setBounds (topButtonArea.removeFromRight (80));
   #endif

    bounds.removeFromTop (20);

    auto orientation = Desktop::getInstance().getCurrentOrientation();

    if (orientation == Desktop::DisplayOrientation::upright
           || orientation == Desktop::DisplayOrientation::upsideDown)
    {
        auto brightnessControlBounds = bounds.removeFromBottom (getHeight() / 10);

        brightnessSlider.setSliderStyle (Slider::SliderStyle::LinearHorizontal);
        brightnessLED.setBounds (brightnessControlBounds.removeFromLeft (getHeight() / 10));
        brightnessSlider.setBounds (brightnessControlBounds);
    }
    else
    {
        auto brightnessControlBounds = bounds.removeFromRight (getWidth() / 10);

        brightnessSlider.setSliderStyle (Slider::SliderStyle::LinearVertical);
        brightnessLED.setBounds (brightnessControlBounds.removeFromTop (getWidth() / 10));
        brightnessSlider.setBounds (brightnessControlBounds);
    }

    // lightpad component
    auto sideLength = jmin (bounds.getWidth() - 40, bounds.getHeight() - 40);
    lightpadComponent.centreWithSize (sideLength, sideLength);
}

void MainComponent::topologyChanged()
{
    lightpadComponent.setVisible (false);
    infoLabel.setVisible (true);

    // Reset the activeBlock object
    if (activeBlock != nullptr)
        detachActiveBlock();

    // Get the array of currently connected Block objects from the PhysicalTopologySource
    auto blocks = topologySource.getCurrentTopology().blocks;

    // Iterate over the array of Block objects
    for (auto b : blocks)
    {
        // Find the first Lightpad
        if (b->getType() == Block::Type::lightPadBlock)
        {
            activeBlock = b;

            // Register MainContentComponent as a listener to the touch surface
            if (auto surface = activeBlock->getTouchSurface())
                surface->addListener (this);

            // Register MainContentComponent as a listener to any buttons
            for (auto button : activeBlock->getButtons())
                button->addListener (this);

            // Get the LEDGrid object from the Lightpad and set its program to the program for the current mode
            if (auto grid = activeBlock->getLEDGrid())
            {
                // Work out scale factors to translate X and Y touches to LED indexes
                scaleX = (float) (grid->getNumColumns() - 1) / activeBlock->getWidth();
                scaleY = (float) (grid->getNumRows() - 1)    / activeBlock->getHeight();

                setLEDProgram (*activeBlock);
            }

            // Make the on screen Lighpad component visible
            lightpadComponent.setVisible (true);
            infoLabel.setVisible (false);

            break;
        }
    }
}

//==============================================================================
void MainComponent::touchChanged (TouchSurface&, const TouchSurface::Touch& touch)
{
    // Translate X and Y touch events to LED indexes
    auto xLed = roundToInt (touch.x * scaleX);
    auto yLed = roundToInt (touch.y * scaleY);

    if (currentMode == colourPalette)
    {
        if (layout.setActiveColourForTouch (xLed, yLed))
        {
            if (auto* colourPaletteProgram = getPaletteProgram())
            {
                colourPaletteProgram->setGridFills (layout.numColumns, layout.numRows, layout.gridFillArray);
                brightnessLED.setColour (layout.currentColour
                                               .withBrightness (layout.currentColour == Colours::black ? 0.0f
                                                                                                       : static_cast<float> (brightnessSlider.getValue())));
            }
        }
    }
    else if (currentMode == canvas)
    {
        drawLED ((uint32) xLed, (uint32) yLed, touch.z, layout.currentColour);
    }
}

void MainComponent::buttonReleased (ControlButton&, Block::Timestamp)
{
    if (currentMode == canvas)
    {
        // Wait 500ms to see if there is a second press
        if (! isTimerRunning())
            startTimer (500);
        else
            doublePress = true;
    }
    else if (currentMode == colourPalette)
    {
        // Switch to canvas mode and set the LEDGrid program
        currentMode = canvas;
        setLEDProgram (*activeBlock);
    }
}

void MainComponent::buttonClicked (Button* b)
{
   #if JUCE_IOS
    if (b == &connectButton)
    {
        BluetoothMidiDevicePairingDialogue::open();
        return;
    }
   #else
    ignoreUnused (b);
   #endif

    clearLEDs();
}

void MainComponent::sliderValueChanged (Slider* s)
{
    if (s == &brightnessSlider)
        brightnessLED.setColour (layout.currentColour
                                       .withBrightness (layout.currentColour == Colours::black ? 0.0f
                                                                                               : static_cast<float> (brightnessSlider.getValue())));
}

void MainComponent::timerCallback()
{
    if (doublePress)
    {
        clearLEDs();

        // Reset the doublePress flag
        doublePress = false;
    }
    else
    {
        // Switch to colour palette mode and set the LEDGrid program
        currentMode = colourPalette;
        setLEDProgram (*activeBlock);
    }

    stopTimer();
}

void MainComponent::ledClicked (int x, int y, float z)
{
    drawLED ((uint32) x, (uint32) y,
             z == 0.0f ? static_cast<float> (brightnessSlider.getValue())
                       : z * static_cast<float> (brightnessSlider.getValue()), layout.currentColour);
}

void MainComponent::detachActiveBlock()
{
    if (auto surface = activeBlock->getTouchSurface())
        surface->removeListener (this);

    for (auto button : activeBlock->getButtons())
        button->removeListener (this);

    activeBlock = nullptr;
}

void MainComponent::setLEDProgram (Block& block)
{
    if (currentMode == canvas)
    {
        block.setProgram (new BitmapLEDProgram (block));

        // Redraw any previously drawn LEDs
        redrawLEDs();
    }
    else if (currentMode == colourPalette)
    {
        block.setProgram (new DrumPadGridProgram (block));

        // Setup the grid layout
        if (auto* program = getPaletteProgram())
            program->setGridFills (layout.numColumns, layout.numRows, layout.gridFillArray);
    }
}

void MainComponent::clearLEDs()
{
    if (auto* canvasProgram = getCanvasProgram())
    {
        // Clear the LED grid
        for (uint32 x = 0; x < 15; ++x)
        {
            for (uint32 y = 0; y < 15; ++ y)
            {
                canvasProgram->setLED (x, y, Colours::black);
                lightpadComponent.setLEDColour (x, y, Colours::black);
            }
        }

        // Clear the ActiveLED array
        activeLeds.clear();
    }
}

void MainComponent::drawLED (uint32 x0, uint32 y0, float z, Colour drawColour)
{
    if (auto* canvasProgram = getCanvasProgram())
    {
        // Check if the activeLeds array already contains an ActiveLED object for this LED
        auto index = getLEDAt (x0, y0);

        // If the colour is black then just set the LED to black and return
        if (drawColour == Colours::black)
        {
            if (index >= 0)
            {
                canvasProgram->setLED (x0, y0, Colours::black);
                lightpadComponent.setLEDColour (x0, y0, Colours::black);
                activeLeds.remove (index);
            }

            return;
        }

        // If there is no ActiveLED obejct for this LED then create one,
        // add it to the array, set the LED on the Block and return
        if (index < 0)
        {
            ActiveLED led;
            led.x = x0;
            led.y = y0;
            led.colour = drawColour;
            led.brightness = z;

            activeLeds.add (led);
            canvasProgram->setLED (led.x, led.y, led.colour.withBrightness (led.brightness));

            lightpadComponent.setLEDColour (led.x, led.y, led.colour.withBrightness (led.brightness));

            return;
        }

        // Get the ActiveLED object for this LED
        auto currentLed = activeLeds.getReference (index);

        // If the LED colour is the same as the draw colour, add the brightnesses together.
        // If it is different, blend the colours
        if (currentLed.colour == drawColour)
            currentLed.brightness = jmin (currentLed.brightness + z, 1.0f);
        else
            currentLed.colour = currentLed.colour.interpolatedWith (drawColour, z);


        // Set the LED on the Block and change the ActiveLED object in the activeLeds array
        if (canvasProgram != nullptr)
            canvasProgram->setLED (currentLed.x, currentLed.y, currentLed.colour.withBrightness (currentLed.brightness));

        lightpadComponent.setLEDColour (currentLed.x, currentLed.y, currentLed.colour.withBrightness (currentLed.brightness));

        activeLeds.set (index, currentLed);
    }
}

void MainComponent::redrawLEDs()
{
    if (auto* canvasProgram = getCanvasProgram())
    {
        // Iterate over the activeLeds array and set the LEDs on the Block
        for (auto led : activeLeds)
        {
            canvasProgram->setLED (led.x, led.y, led.colour.withBrightness (led.brightness));
            lightpadComponent.setLEDColour (led.x, led.y, led.colour.withBrightness (led.brightness));
        }
    }
}