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411 lines
17 KiB
411 lines
17 KiB
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2015 - ROLI Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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==============================================================================
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*/
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#ifndef JUCE_MIDIKEYBOARDCOMPONENT_H_INCLUDED
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#define JUCE_MIDIKEYBOARDCOMPONENT_H_INCLUDED
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//==============================================================================
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/**
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A component that displays a piano keyboard, whose notes can be clicked on.
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This component will mimic a physical midi keyboard, showing the current state of
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a MidiKeyboardState object. When the on-screen keys are clicked on, it will play these
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notes by calling the noteOn() and noteOff() methods of its MidiKeyboardState object.
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Another feature is that the computer keyboard can also be used to play notes. By
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default it maps the top two rows of a standard querty keyboard to the notes, but
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these can be remapped if needed. It will only respond to keypresses when it has
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the keyboard focus, so to disable this feature you can call setWantsKeyboardFocus (false).
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The component is also a ChangeBroadcaster, so if you want to be informed when the
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keyboard is scrolled, you can register a ChangeListener for callbacks.
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@see MidiKeyboardState
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*/
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class JUCE_API MidiKeyboardComponent : public Component,
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public MidiKeyboardStateListener,
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public ChangeBroadcaster,
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private Timer
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{
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public:
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//==============================================================================
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/** The direction of the keyboard.
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@see setOrientation
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*/
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enum Orientation
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{
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horizontalKeyboard,
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verticalKeyboardFacingLeft,
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verticalKeyboardFacingRight,
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};
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/** Creates a MidiKeyboardComponent.
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@param state the midi keyboard model that this component will represent
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@param orientation whether the keyboard is horizonal or vertical
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*/
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MidiKeyboardComponent (MidiKeyboardState& state,
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Orientation orientation);
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/** Destructor. */
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~MidiKeyboardComponent();
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//==============================================================================
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/** Changes the velocity used in midi note-on messages that are triggered by clicking
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on the component.
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Values are 0 to 1.0, where 1.0 is the heaviest.
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@see setMidiChannel
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*/
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void setVelocity (float velocity, bool useMousePositionForVelocity);
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/** Changes the midi channel number that will be used for events triggered by clicking
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on the component.
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The channel must be between 1 and 16 (inclusive). This is the channel that will be
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passed on to the MidiKeyboardState::noteOn() method when the user clicks the component.
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Although this is the channel used for outgoing events, the component can display
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incoming events from more than one channel - see setMidiChannelsToDisplay()
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@see setVelocity
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*/
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void setMidiChannel (int midiChannelNumber);
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/** Returns the midi channel that the keyboard is using for midi messages.
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@see setMidiChannel
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*/
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int getMidiChannel() const noexcept { return midiChannel; }
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/** Sets a mask to indicate which incoming midi channels should be represented by
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key movements.
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The mask is a set of bits, where bit 0 = midi channel 1, bit 1 = midi channel 2, etc.
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If the MidiKeyboardState has a key down for any of the channels whose bits are set
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in this mask, the on-screen keys will also go down.
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By default, this mask is set to 0xffff (all channels displayed).
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@see setMidiChannel
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*/
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void setMidiChannelsToDisplay (int midiChannelMask);
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/** Returns the current set of midi channels represented by the component.
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This is the value that was set with setMidiChannelsToDisplay().
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*/
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int getMidiChannelsToDisplay() const noexcept { return midiInChannelMask; }
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//==============================================================================
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/** Changes the width used to draw the white keys. */
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void setKeyWidth (float widthInPixels);
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/** Returns the width that was set by setKeyWidth(). */
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float getKeyWidth() const noexcept { return keyWidth; }
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/** Changes the keyboard's current direction. */
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void setOrientation (Orientation newOrientation);
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/** Returns the keyboard's current direction. */
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Orientation getOrientation() const noexcept { return orientation; }
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/** Sets the range of midi notes that the keyboard will be limited to.
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By default the range is 0 to 127 (inclusive), but you can limit this if you
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only want a restricted set of the keys to be shown.
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Note that the values here are inclusive and must be between 0 and 127.
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*/
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void setAvailableRange (int lowestNote,
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int highestNote);
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/** Returns the first note in the available range.
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@see setAvailableRange
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*/
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int getRangeStart() const noexcept { return rangeStart; }
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/** Returns the last note in the available range.
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@see setAvailableRange
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*/
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int getRangeEnd() const noexcept { return rangeEnd; }
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/** If the keyboard extends beyond the size of the component, this will scroll
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it to show the given key at the start.
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Whenever the keyboard's position is changed, this will use the ChangeBroadcaster
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base class to send a callback to any ChangeListeners that have been registered.
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*/
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void setLowestVisibleKey (int noteNumber);
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/** Returns the number of the first key shown in the component.
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@see setLowestVisibleKey
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*/
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int getLowestVisibleKey() const noexcept { return (int) firstKey; }
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/** Returns the length of the black notes.
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This will be their vertical or horizontal length, depending on the keyboard's orientation.
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*/
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int getBlackNoteLength() const noexcept { return blackNoteLength; }
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/** If set to true, then scroll buttons will appear at either end of the keyboard
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if there are too many notes to fit them all in the component at once.
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*/
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void setScrollButtonsVisible (bool canScroll);
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//==============================================================================
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/** A set of colour IDs to use to change the colour of various aspects of the keyboard.
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These constants can be used either via the Component::setColour(), or LookAndFeel::setColour()
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methods.
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@see Component::setColour, Component::findColour, LookAndFeel::setColour, LookAndFeel::findColour
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*/
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enum ColourIds
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{
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whiteNoteColourId = 0x1005000,
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blackNoteColourId = 0x1005001,
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keySeparatorLineColourId = 0x1005002,
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mouseOverKeyOverlayColourId = 0x1005003, /**< This colour will be overlaid on the normal note colour. */
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keyDownOverlayColourId = 0x1005004, /**< This colour will be overlaid on the normal note colour. */
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textLabelColourId = 0x1005005,
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upDownButtonBackgroundColourId = 0x1005006,
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upDownButtonArrowColourId = 0x1005007,
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shadowColourId = 0x1005008
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};
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/** Returns the position within the component of the left-hand edge of a key.
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Depending on the keyboard's orientation, this may be a horizontal or vertical
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distance, in either direction.
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*/
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int getKeyStartPosition (int midiNoteNumber) const;
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/** Returns the key at a given coordinate. */
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int getNoteAtPosition (Point<int> position);
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//==============================================================================
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/** Deletes all key-mappings.
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@see setKeyPressForNote
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*/
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void clearKeyMappings();
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/** Maps a key-press to a given note.
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@param key the key that should trigger the note
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@param midiNoteOffsetFromC how many semitones above C the triggered note should
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be. The actual midi note that gets played will be
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this value + (12 * the current base octave). To change
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the base octave, see setKeyPressBaseOctave()
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*/
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void setKeyPressForNote (const KeyPress& key,
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int midiNoteOffsetFromC);
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/** Removes any key-mappings for a given note.
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For a description of what the note number means, see setKeyPressForNote().
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*/
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void removeKeyPressForNote (int midiNoteOffsetFromC);
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/** Changes the base note above which key-press-triggered notes are played.
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The set of key-mappings that trigger notes can be moved up and down to cover
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the entire scale using this method.
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The value passed in is an octave number between 0 and 10 (inclusive), and
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indicates which C is the base note to which the key-mapped notes are
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relative.
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*/
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void setKeyPressBaseOctave (int newOctaveNumber);
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/** This sets the octave number which is shown as the octave number for middle C.
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This affects only the default implementation of getWhiteNoteText(), which
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passes this octave number to MidiMessage::getMidiNoteName() in order to
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get the note text. See MidiMessage::getMidiNoteName() for more info about
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the parameter.
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By default this value is set to 3.
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@see getOctaveForMiddleC
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*/
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void setOctaveForMiddleC (int octaveNumForMiddleC);
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/** This returns the value set by setOctaveForMiddleC().
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@see setOctaveForMiddleC
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*/
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int getOctaveForMiddleC() const noexcept { return octaveNumForMiddleC; }
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//==============================================================================
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/** @internal */
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void paint (Graphics&) override;
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/** @internal */
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void resized() override;
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/** @internal */
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void mouseMove (const MouseEvent&) override;
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/** @internal */
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void mouseDrag (const MouseEvent&) override;
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/** @internal */
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void mouseDown (const MouseEvent&) override;
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/** @internal */
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void mouseUp (const MouseEvent&) override;
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/** @internal */
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void mouseEnter (const MouseEvent&) override;
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/** @internal */
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void mouseExit (const MouseEvent&) override;
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/** @internal */
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void mouseWheelMove (const MouseEvent&, const MouseWheelDetails&) override;
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/** @internal */
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void timerCallback() override;
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/** @internal */
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bool keyStateChanged (bool isKeyDown) override;
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/** @internal */
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bool keyPressed (const KeyPress&) override;
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/** @internal */
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void focusLost (FocusChangeType) override;
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/** @internal */
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void handleNoteOn (MidiKeyboardState*, int midiChannel, int midiNoteNumber, float velocity) override;
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/** @internal */
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void handleNoteOff (MidiKeyboardState*, int midiChannel, int midiNoteNumber) override;
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/** @internal */
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void colourChanged() override;
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protected:
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//==============================================================================
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/** Draws a white note in the given rectangle.
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isOver indicates whether the mouse is over the key, isDown indicates whether the key is
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currently pressed down.
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When doing this, be sure to note the keyboard's orientation.
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*/
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virtual void drawWhiteNote (int midiNoteNumber,
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Graphics& g,
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int x, int y, int w, int h,
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bool isDown, bool isOver,
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const Colour& lineColour,
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const Colour& textColour);
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/** Draws a black note in the given rectangle.
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isOver indicates whether the mouse is over the key, isDown indicates whether the key is
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currently pressed down.
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When doing this, be sure to note the keyboard's orientation.
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*/
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virtual void drawBlackNote (int midiNoteNumber,
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Graphics& g,
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int x, int y, int w, int h,
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bool isDown, bool isOver,
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const Colour& noteFillColour);
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/** Allows text to be drawn on the white notes.
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By default this is used to label the C in each octave, but could be used for other things.
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@see setOctaveForMiddleC
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*/
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virtual String getWhiteNoteText (const int midiNoteNumber);
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/** Draws the up and down buttons that change the base note. */
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virtual void drawUpDownButton (Graphics& g, int w, int h,
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const bool isMouseOver,
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const bool isButtonPressed,
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const bool movesOctavesUp);
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/** Callback when the mouse is clicked on a key.
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You could use this to do things like handle right-clicks on keys, etc.
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Return true if you want the click to trigger the note, or false if you
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want to handle it yourself and not have the note played.
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@see mouseDraggedToKey
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*/
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virtual bool mouseDownOnKey (int midiNoteNumber, const MouseEvent& e);
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/** Callback when the mouse is dragged from one key onto another.
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@see mouseDownOnKey
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*/
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virtual void mouseDraggedToKey (int midiNoteNumber, const MouseEvent& e);
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/** Callback when the mouse is released from a key.
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@see mouseDownOnKey
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*/
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virtual void mouseUpOnKey (int midiNoteNumber, const MouseEvent& e);
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/** Calculates the positon of a given midi-note.
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This can be overridden to create layouts with custom key-widths.
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@param midiNoteNumber the note to find
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@param keyWidth the desired width in pixels of one key - see setKeyWidth()
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@param x the x position of the left-hand edge of the key (this method
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always works in terms of a horizontal keyboard)
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@param w the width of the key
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*/
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virtual void getKeyPosition (int midiNoteNumber, float keyWidth,
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int& x, int& w) const;
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private:
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//==============================================================================
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friend class MidiKeyboardUpDownButton;
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MidiKeyboardState& state;
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int xOffset, blackNoteLength;
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float keyWidth;
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Orientation orientation;
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int midiChannel, midiInChannelMask;
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float velocity;
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Array<int> mouseOverNotes, mouseDownNotes;
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BigInteger keysPressed, keysCurrentlyDrawnDown;
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bool shouldCheckState;
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int rangeStart, rangeEnd;
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float firstKey;
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bool canScroll, useMousePositionForVelocity, shouldCheckMousePos;
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ScopedPointer<Button> scrollDown, scrollUp;
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Array<KeyPress> keyPresses;
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Array<int> keyPressNotes;
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int keyMappingOctave, octaveNumForMiddleC;
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static const uint8 whiteNotes[];
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static const uint8 blackNotes[];
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void getKeyPos (int midiNoteNumber, int& x, int& w) const;
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int xyToNote (Point<int>, float& mousePositionVelocity);
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int remappedXYToNote (Point<int>, float& mousePositionVelocity) const;
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void resetAnyKeysInUse();
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void updateNoteUnderMouse (Point<int>, bool isDown, int fingerNum);
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void updateNoteUnderMouse (const MouseEvent&, bool isDown);
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void repaintNote (const int midiNoteNumber);
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void setLowestVisibleKeyFloat (float noteNumber);
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Rectangle<int> getWhiteNotePos (int noteNumber) const;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MidiKeyboardComponent)
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};
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#endif // JUCE_MIDIKEYBOARDCOMPONENT_H_INCLUDED
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