/**************************************************************************** * NxWidgets/nxwm/include/ccalibration.hxx * * Copyright (C) 2012-2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX, NxWidgets, nor the names of its contributors * me be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ #ifndef __INCLUDE_CCALIBRATION_HXX #define __INCLUDE_CCALIBRATION_HXX /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include "cnxstring.hxx" #include "cwidgeteventhandler.hxx" #include "cwidgetcontrol.hxx" #include "clabel.hxx" #include "cnxfont.hxx" #include "ctaskbar.hxx" #include "iapplication.hxx" #include "cfullscreenwindow.hxx" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /** * Calibration indices */ #define CALIB_UPPER_LEFT_INDEX 0 #define CALIB_UPPER_RIGHT_INDEX 1 #define CALIB_LOWER_RIGHT_INDEX 2 #define CALIB_LOWER_LEFT_INDEX 3 #define CALIB_DATA_POINTS 4 /**************************************************************************** * Implementation Classes ****************************************************************************/ namespace NxWM { /** * Forward references */ struct CTouchscreen; /** * Touchscreen calibration data */ #ifdef CONFIG_NXWM_CALIBRATION_ANISOTROPIC struct SCalibrationLine { float slope; /**< The slope of a line */ float offset; /**< The offset of a line */ }; struct SCalibrationData { struct SCalibrationLine left; /**< Describes Y values along left edge */ struct SCalibrationLine right; /**< Describes Y values along right edge */ struct SCalibrationLine top; /**< Describes X values along top */ struct SCalibrationLine bottom; /**< Describes X values along bottom edge */ nxgl_coord_t leftX; /**< Left X value used in calibration */ nxgl_coord_t rightX; /**< Right X value used in calibration */ nxgl_coord_t topY; /**< Top Y value used in calibration */ nxgl_coord_t bottomY; /**< Bottom Y value used in calibration */ }; #else struct SCalibrationData { b16_t xSlope; /**< X conversion: xSlope*(x) + xOffset */ b16_t xOffset; b16_t ySlope; /**< Y conversion: ySlope*(y) + yOffset */ b16_t yOffset; }; #endif /** * The CCalibration class provides the the calibration window and obtains * callibration data. */ class CCalibration : public IApplication { private: /** * The state of the calibration thread. */ enum ECalThreadState { CALTHREAD_NOTRUNNING = 0, /**< The calibration thread has not yet been started */ CALTHREAD_STARTED, /**< The calibration thread has been started, but is not yet running */ CALTHREAD_RUNNING, /**< The calibration thread is running normally */ CALTHREAD_STOPREQUESTED, /**< The calibration thread has been requested to stop */ CALTHREAD_HIDE, /**< The hide() called by calibration thread running */ CALTHREAD_SHOW, /**< The redraw() called by calibration thread running */ CALTHREAD_TERMINATED /**< The calibration thread terminated normally */ }; /** * Identifies the current display state */ enum ECalibrationPhase { CALPHASE_NOT_STARTED = 0, /**< Constructed, but not yet started */ CALPHASE_UPPER_LEFT, /**< Touch point is in the upper left corner */ CALPHASE_UPPER_RIGHT, /**< Touch point is in the upper right corner */ CALPHASE_LOWER_RIGHT, /**< Touch point is in the lower left corner */ CALPHASE_LOWER_LEFT, /**< Touch point is in the lower right corner */ CALPHASE_COMPLETE /**< Calibration is complete */ }; /** * Characterizes one calibration screen */ struct SCalibScreenInfo { struct nxgl_point_s pos; /**< The position of the touch point */ nxgl_mxpixel_t lineColor; /**< The color of the cross-hair lines */ nxgl_mxpixel_t circleFillColor; /**< The color of the circle */ }; /** * CCalibration state data */ CTaskbar *m_taskbar; /**< The taskbar (used to terminate calibration) */ CFullScreenWindow *m_window; /**< The window for the calibration display */ CTouchscreen *m_touchscreen; /**< The touchscreen device */ #ifdef CONFIG_NXWM_CALIBRATION_MESSAGES NXWidgets::CLabel *m_text; /**< Calibration message */ NXWidgets::CNxFont *m_font; /**< The font used in the message */ #endif pthread_t m_thread; /**< The calibration thread ID */ struct SCalibScreenInfo m_screenInfo; /**< Describes the current calibration display */ struct nxgl_point_s m_touchPos; /**< This is the last touch position */ volatile uint8_t m_calthread; /**< Current calibration display state (See ECalibThreadState)*/ uint8_t m_calphase; /**< Current calibration display state (See ECalibrationPhase)*/ bool m_stop; /**< True: We have been asked to stop the calibration */ bool m_touched; /**< True: The screen is touched */ uint8_t m_touchId; /**< The ID of the touch */ #ifdef CONFIG_NXWM_CALIBRATION_AVERAGE uint8_t m_nsamples; /**< Number of samples collected so far at this position */ struct nxgl_point_s m_sampleData[CONFIG_NXWM_CALIBRATION_NSAMPLES]; #endif struct nxgl_point_s m_calibData[CALIB_DATA_POINTS]; /** * Accept raw touchscreen input. * * @param sample Touchscreen input sample */ void touchscreenInput(struct touch_sample_s &sample); #ifdef CONFIG_NXWM_CALIBRATION_MESSAGES /** * Create widgets need by the calibration thread. * * @return True if the widgets were successfully created. */ bool createWidgets(void); /** * Destroy widgets created for the calibration thread. */ void destroyWidgets(void); #endif /** * Start the calibration thread. * * @param initialState. The initial state of the calibration thread * @return True if the thread was successfully started. */ bool startCalibration(enum ECalThreadState initialState); /** * Return true if the calibration thread is running normally. There are * lots of potential race conditions. There are also two ambiguous * states: * * 1) The thread may have been started but not yet running * (CALTHREAD_STARTED), or the * 2) The thread may been requested to terminate, but has not yet * terminated (CALTHREAD_STOPREQUESTED) * * Both of those states will cause isRunning() to return false. * * @return True if the calibration thread is runnning normally. */ inline bool isRunning(void) const { return (m_calthread == CALTHREAD_RUNNING || m_calthread == CALTHREAD_HIDE || m_calthread == CALTHREAD_SHOW); } /** * Return true if the calibration thread is has been started and has not * yet terminated. There is a potential race condition here when the * thread has been requested to terminate, but has not yet terminated * (CALTHREAD_STOPREQUESTED). isStarted() will return false in that case. * * @return True if the calibration thread has been started and/or is * running normally. */ inline bool isStarted(void) const { return (m_calthread == CALTHREAD_STARTED || m_calthread == CALTHREAD_RUNNING || m_calthread == CALTHREAD_HIDE || m_calthread == CALTHREAD_SHOW); } /** * The calibration thread. This is the entry point of a thread that provides the * calibration displays, waits for input, and collects calibration data. * * @param arg. The CCalibration 'this' pointer cast to a void*. * @return This function always returns NULL when the thread exits */ static FAR void *calibration(FAR void *arg); /** * Accumulate and average touch sample data * * @param average. When the averaged data is available, return it here * @return True: Average data is available; False: Need to collect more samples */ #ifdef CONFIG_NXWM_CALIBRATION_AVERAGE bool averageSamples(struct nxgl_point_s &average); #endif /** * This is the calibration state machine. It is called initially and then * as new touchscreen data is received. */ void stateMachine(void); /** * Presents the next calibration screen */ void showCalibration(void); /** * Finish calibration steps and provide the calibration data to the * touchscreen driver. */ void finishCalibration(void); /** * Given the raw touch data collected by the calibration thread, create the * massaged calibration data needed by CTouchscreen. * * @param data. A reference to the location to save the calibration data * @return True if the calibration data was successfully created. */ bool createCalibrationData(struct SCalibrationData &data); public: /** * CCalibration Constructor * * @param taskbar. The taskbar instance used to terminate calibration * @param window. The window to use for the calibration display * @param touchscreen. An instance of the class that wraps the * touchscreen device. */ CCalibration(CTaskbar *taskbar, CFullScreenWindow *window, CTouchscreen *touchscreen); /** * CCalibration Destructor */ ~CCalibration(void); /** * Each implementation of IApplication must provide a method to recover * the contained IApplicationWindow instance. */ IApplicationWindow *getWindow(void) const; /** * Get the icon associated with the application * * @return An instance if IBitmap that may be used to rend the * application's icon. This is an new IBitmap instance that must * be deleted by the caller when it is no long needed. */ NXWidgets::IBitmap *getIcon(void); /** * Get the name string associated with the application * * @return A copy if CNxString that contains the name of the application. */ NXWidgets::CNxString getName(void); /** * Start the application (perhaps in the minimized state). * * @return True if the application was successfully started. */ bool run(void); /** * Stop the application. */ void stop(void); /** * Destroy the application and free all of its resources. This method * will initiate blocking of messages from the NX server. The server * will flush the window message queue and reply with the blocked * message. When the block message is received by CWindowMessenger, * it will send the destroy message to the start window task which * will, finally, safely delete the application. */ void destroy(void); /** * The application window is hidden (either it is minimized or it is * maximized, but not at the top of the hierarchy */ void hide(void); /** * Redraw the entire window. The application has been maximized or * otherwise moved to the top of the hierarchy. This method is called from * CTaskbar when the application window must be displayed */ void redraw(void); /** * Report of this is a "normal" window or a full screen window. The * primary purpose of this method is so that window manager will know * whether or not it show draw the task bar. * * @return True if this is a full screen window. */ bool isFullScreen(void) const; }; class CCalibrationFactory : public IApplicationFactory { private: CTaskbar *m_taskbar; /**< The taskbar */ CTouchscreen *m_touchscreen; /**< The touchscreen device */ public: /** * CCalibrationFactory Constructor * * @param taskbar. The taskbar instance used to terminate calibration * @param touchscreen. An instance of the class that wraps the * touchscreen device. */ CCalibrationFactory(CTaskbar *taskbar, CTouchscreen *touchscreen); /** * CCalibrationFactory Destructor */ inline ~CCalibrationFactory(void) { } /** * Create a new instance of an CCalibration (as IApplication). */ IApplication *create(void); /** * Get the icon associated with the application * * @return An instance if IBitmap that may be used to rend the * application's icon. This is an new IBitmap instance that must * be deleted by the caller when it is no long needed. */ NXWidgets::IBitmap *getIcon(void); }; } #endif // __INCLUDE_CCALIBRATION_HXX