TouchscreenKeyboard Class Reference

Touchscreen keyboard. More...

#include <touchscreenkeyboard.h>

Inheritance diagram for TouchscreenKeyboard:

Collaboration diagram for TouchscreenKeyboard:

Public Slots
void	receiveTouchpadKeyboardEvent (QVariant keys)
	SLOT: Receive an event from the touchscreen keyboard. More...
void	setToggleMode (bool on)
void	clear ()
	Clear the keyboard memory and turn all notes off. More...

Signals
void	sendTouchpadMidiEvent (QMidiMessage event)
	Signal: On keypress send the corresponding Midi event to a different module. More...
void	highlightKey (QVariant key, QVariant on)
	Signal: Tells the Qml layer to highlight pressed keys. More...

Public Member Functions
	TouchscreenKeyboard ()
	Constructor. More...
bool	init ()
bool	start ()
bool	stop ()
bool	exit ()
void	suspend ()
void	resume ()

Private Member Functions
void	switchNote (int key, bool on)
	Switch note on or off. More...

Private Attributes
QSet< int >	mPressedKeys
	Keeps track of pressed keys. More...
QVector< bool >	mSoundActive
	Flag wether the sound is turned on. More...
bool	mToggleMode
	Flag for desktop toggling mode. More...
bool	mActive
	Flag that allows to send data. More...

Detailed Description

Touchscreen keyboard.

This class manages the data flow related to the touchscreen keyboard. The keyboard itself (its geometry and so on) is realized on the Qml side. The Qml Keyboard object yields signals containing a list with the MIDI-compliant indices of the pressed keys. The keyboard is insensitive to the intensity of the touch, i.e., all notes are played at constant volume.

The touchscreen keyboard can operate in two different modes. In the touchscreen mode the key is pressed only as long as it is actually touched. In the toggle mode one can toggle the keys by tapping or clicking between 'pressed' and 'not pressed'.

Definition at line 45 of file touchscreenkeyboard.h.

Constructor & Destructor Documentation

TouchscreenKeyboard::TouchscreenKeyboard

(

)

Constructor.

Definition at line 29 of file touchscreenkeyboard.cpp.

Member Function Documentation

void TouchscreenKeyboard::clear ( )

slot

Clear the keyboard memory and turn all notes off.

Definition at line 111 of file touchscreenkeyboard.cpp.

bool TouchscreenKeyboard::exit ( )

inline

Definition at line 54 of file touchscreenkeyboard.h.

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void TouchscreenKeyboard::highlightKey ( QVariant  key, QVariant  on  )

signal

Signal: Tells the Qml layer to highlight pressed keys.

bool TouchscreenKeyboard::init ( )

inline

Definition at line 51 of file touchscreenkeyboard.h.

void TouchscreenKeyboard::receiveTouchpadKeyboardEvent ( QVariant  keys )

slot

SLOT: Receive an event from the touchscreen keyboard.

The Qml layer calls this slot as soon as the status of the keyboard changes. This function finds out which of the keys have been pressed or released.

Parameters

keys	: The list of keys (in Midi norm) which are currently pressed.

Definition at line 49 of file touchscreenkeyboard.cpp.

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void TouchscreenKeyboard::resume ( )

inline

Definition at line 56 of file touchscreenkeyboard.h.

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void TouchscreenKeyboard::sendTouchpadMidiEvent ( QMidiMessage  event )

signal

Signal: On keypress send the corresponding Midi event to a different module.

void TouchscreenKeyboard::setToggleMode ( bool  on )

inlineslot

Definition at line 60 of file touchscreenkeyboard.h.

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bool TouchscreenKeyboard::start ( )

inline

Definition at line 52 of file touchscreenkeyboard.h.

bool TouchscreenKeyboard::stop ( )

inline

Definition at line 53 of file touchscreenkeyboard.h.

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void TouchscreenKeyboard::suspend ( )

inline

Definition at line 55 of file touchscreenkeyboard.h.

void TouchscreenKeyboard::switchNote ( int  key, bool  on  )

private

Switch note on or off.

Parameters

key	: Number of the key according to the Midi standard.
on	: True if note is turned on, false if it is switched off.

Definition at line 89 of file touchscreenkeyboard.cpp.

Member Data Documentation

bool TouchscreenKeyboard::mActive

private

Flag that allows to send data.

Definition at line 75 of file touchscreenkeyboard.h.

QSet<int> TouchscreenKeyboard::mPressedKeys

private

Keeps track of pressed keys.

Definition at line 72 of file touchscreenkeyboard.h.

QVector<bool> TouchscreenKeyboard::mSoundActive

private

Flag wether the sound is turned on.

Definition at line 73 of file touchscreenkeyboard.h.

bool TouchscreenKeyboard::mToggleMode

private

Flag for desktop toggling mode.

Definition at line 74 of file touchscreenkeyboard.h.

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The documentation for this class was generated from the following files:

• touchscreenkeyboard.h
• touchscreenkeyboard.cpp