JUCE/modules/juce_blocks_basics/blocks/juce_ControlButton.h

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

   This file is part of the JUCE library.
   Copyright (c) 2016 - ROLI Ltd.

   Permission is granted to use this software under the terms of the ISC license
   http://www.isc.org/downloads/software-support-policy/isc-license/

   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 ISC DISCLAIMS ALL WARRANTIES WITH REGARD
   TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
   FITNESS. IN NO EVENT SHALL ISC 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.

   -----------------------------------------------------------------------------

   To release a closed-source product which uses other parts of JUCE not
   licensed under the ISC terms, commercial licenses are available: visit
   www.juce.com for more information.

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


/**
    Represents a button on a block device.
*/
class ControlButton
{
public:
    ControlButton (Block&);

    /** Destructor. */
    virtual ~ControlButton();

    /** These are all known types of control buttons.
        You can find out which buttons a device has by calling getButtons(),
        and can get the name of a button type with getButtonName().
    */
    enum ButtonFunction
    {
        mode,   // The button on the side of a lightpad block and the first button on a live/loop block

        volume, // on live + loop blocks

        // common to all types of block
        up,
        down,

        // live block buttons
        scale,
        chord,
        arp,
        sustain,
        octave,
        love,

        // loop block buttons
        click,
        snap,
        back,
        playOrPause,
        record,
        learn,

        // developer block buttons
        button0,
        button1,
        button2,
        button3,
        button4,
        button5,
        button6,
        button7
    };

    /** Returns the button's type. */
    virtual ButtonFunction getType() const = 0;

    /** Returns the button's description. */
    virtual juce::String getName() const = 0;

    /** Returns the position of this button on the device, in device units.
        For buttons that are on the side of the device, this may want to return a value that
        is beyond the phyiscal block size.
    */
    virtual float getPositionX() const = 0;

    /** Returns the position of this button on the device, in device units.
        For buttons that are on the side of the device, this may want to return a value that
        is beyond the phyiscal block size.
    */
    virtual float getPositionY() const = 0;

    /** Returns true if this button has a controllable light. */
    virtual bool hasLight() const = 0;

    /** If the button can light-up, this sets its colour. */
    virtual bool setLightColour (LEDColour newColour) = 0;

    /** A listener that can be attached to a ControlButton object so that it
        gets called when the button is pushed or released.
    */
    struct Listener
    {
        virtual ~Listener();

        /** */
        virtual void buttonPressed (ControlButton&, Block::Timestamp) = 0;
        virtual void buttonReleased (ControlButton&, Block::Timestamp) = 0;
    };

    /** */
    void addListener (Listener*);
    /** */
    void removeListener (Listener*);

    /** */
    Block& block;

protected:
    juce::ListenerList<Listener> listeners;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (ControlButton)
};