222 lines
8.0 KiB
C++
222 lines
8.0 KiB
C++
/****************************************************************************
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* NxWidgets/nxwm/include/ctouchscreen.hxx
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX, NxWidgets, nor the names of its contributors
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* me be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_CTOUCHSCREEN_HXX
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#define __INCLUDE_CTOUCHSCREEN_HXX
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/nx/nxglib.h>
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#include <semaphore.h>
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#include <pthread.h>
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#include <nuttx/input/touchscreen.h>
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#include "cnxserver.hxx"
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#include "ccalibration.hxx"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Implementation Classes
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****************************************************************************/
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namespace NxWM
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{
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/**
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* The CTouchscreen class provides the the calibration window and obtains
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* callibration data.
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*/
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class CTouchscreen
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{
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private:
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/**
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* The state of the listener thread.
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*/
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enum EListenerState
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{
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LISTENER_NOTRUNNING = 0, /**< The listener thread has not yet been started */
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LISTENER_STARTED, /**< The listener thread has been started, but is not yet running */
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LISTENER_RUNNING, /**< The listener thread is running normally */
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LISTENER_STOPREQUESTED, /**< The listener thread has been requested to stop */
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LISTENER_TERMINATED, /**< The listener thread terminated normally */
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LISTENER_FAILED /**< The listener thread terminated abnormally */
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};
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/**
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* CTouchscreen state data
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*/
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NXWidgets::CNxServer *m_server; /**< The current NX server */
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int m_touchFd; /**< File descriptor of the opened touchscreen device */
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sem_t m_waitSem; /**< Semaphore the supports waits for touchscreen data */
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pthread_t m_thread; /**< The listener thread ID */
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volatile enum EListenerState m_state; /**< The state of the listener thread */
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volatile bool m_enabled; /**< True: Normal touchscreen processing */
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volatile bool m_capture; /**< True: There is a thread waiting for raw touch data */
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volatile bool m_calibrated; /**< True: If have calibration data */
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struct nxgl_size_s m_windowSize; /**< The size of the physical display */
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struct SCalibrationData m_calibData; /**< Calibration data */
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struct touch_sample_s m_sample; /**< In normal mode, touch data is collected here */
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struct touch_sample_s *m_touch; /**< Points to the current touch data buffer */
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/**
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* The touchscreen listener thread. This is the entry point of a thread that
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* listeners for and dispatches touchscreens events to the NX server.
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*
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* @param arg. The CTouchscreen 'this' pointer cast to a void*.
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* @return This function normally does not return but may return NULL on
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* error conditions.
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*/
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static FAR void *listener(FAR void *arg);
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/**
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* Inject touchscreen data into NX as mouse intput
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*
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* @param sample. The buffer where data was collected.
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*/
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void handleMouseInput(struct touch_sample_s *sample);
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public:
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/**
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* CTouchscreen Constructor
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*
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* @param server. An instance of the NX server. This will be needed for
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* injecting mouse data.
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* @param windowSize. The size of the physical window in pixels. This
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* is needed for touchscreen scaling.
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*/
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CTouchscreen(NXWidgets::CNxServer *server, struct nxgl_size_s *windowSize);
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/**
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* CTouchscreen Destructor
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*/
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~CTouchscreen(void);
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/**
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* Start the touchscreen listener thread.
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*
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* @return True if the touchscreen listener thread was correctly started.
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*/
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bool start(void);
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/**
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* Enable/disable touchscreen data processing. When enabled, touchscreen events
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* are calibrated and forwarded to the NX layer which dispatches the touchscreen
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* events in window-relative positions to the correct NX window.
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*
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* When disabled, touchscreen data is not forwarded to NX, but is instead captured
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* and made available for touchscreen calibration. The touchscreen driver is
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* initially disabled and must be specifically enabled be begin normal processing.
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* Normal processing also requires calibration data (see method setCalibrationData)
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*
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* @param capture. True enables capture mode; false disables.
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*/
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inline void setEnabled(bool enable)
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{
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// Set the capture flag. m_calibrated must also be set to get to normal
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// mode where touchscreen data is forwarded to NX.
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m_enabled = enable;
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}
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/**
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* Is the touchscreen calibrated?
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*
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* @return True if the touchscreen has been calibrated.
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*/
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inline bool isCalibrated(void) const
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{
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return m_calibrated;
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}
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/**
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* Provide touchscreen calibration data. If calibration data is received (and
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* the touchscreen is enabled), then received touchscreen data will be scaled
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* using the calibration data and forward to the NX layer which dispatches the
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* touchscreen events in window-relative positions to the correct NX window.
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*
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* @param data. A reference to the touchscreen data.
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*/
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void setCalibrationData(const struct SCalibrationData &caldata);
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/**
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* Recover the calibration data so that it can be saved to non-volatile storage.
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*
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* @param data. A reference to the touchscreen data.
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* @return True if calibration data was successfully returned.
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*/
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inline bool getCalibrationData(struct SCalibrationData &caldata) const
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{
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if (m_calibrated)
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{
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caldata = m_calibData;
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}
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return m_calibrated;
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}
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/**
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* Capture raw driver data. This method will capture mode one raw touchscreen
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* input. The normal use of this method is for touchscreen calibration.
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*
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* This function is not re-entrant: There may be only one thread waiting for
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* raw touchscreen data.
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*
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* @return True if the raw touchscreen data was sucessfully obtained
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*/
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bool waitRawTouchData(struct touch_sample_s *touch);
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};
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}
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#endif // __INCLUDE_CTOUCHSCREEN_HXX
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