371 lines
12 KiB
C++
371 lines
12 KiB
C++
/****************************************************************************
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* NxWidgets/nxwm/include/ccalibration.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_CCALIBRATION_HXX
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#define __INCLUDE_CCALIBRATION_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 <pthread.h>
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#include <fixedmath.h>
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#include "cnxstring.hxx"
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#include "cwidgeteventhandler.hxx"
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#include "cwidgetcontrol.hxx"
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#include "ctaskbar.hxx"
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#include "iapplication.hxx"
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#include "cfullscreenwindow.hxx"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/**
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* Calibration indices
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*/
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#define CALIB_UPPER_LEFT_INDEX 0
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#define CALIB_UPPER_RIGHT_INDEX 1
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#define CALIB_LOWER_RIGHT_INDEX 2
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#define CALIB_LOWER_LEFT_INDEX 3
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#define CALIB_DATA_POINTS 4
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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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* Forward references
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*/
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struct CTouchscreen;
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/**
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* Touchscreen calibration data
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*/
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struct SCalibrationData
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{
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b16_t xSlope; // X conversion: xSlope*(x) + xOffset
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b16_t xOffset;
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b16_t ySlope; // Y conversion: ySlope*(y) + yOffset
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b16_t yOffset;
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};
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/**
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* The CCalibration class provides the the calibration window and obtains
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* callibration data.
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*/
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class CCalibration : public IApplication
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{
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private:
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/**
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* The state of the calibration thread.
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*/
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enum ECalThreadState
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{
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CALTHREAD_NOTRUNNING = 0, /**< The calibration thread has not yet been started */
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CALTHREAD_STARTED, /**< The calibration thread has been started, but is not yet running */
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CALTHREAD_RUNNING, /**< The calibration thread is running normally */
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CALTHREAD_STOPREQUESTED, /**< The calibration thread has been requested to stop */
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CALTHREAD_HIDE, /**< The hide() called by calibration thread running */
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CALTHREAD_SHOW, /**< The redraw() called by calibration thread running */
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CALTHREAD_TERMINATED /**< The calibration thread terminated normally */
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};
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/**
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* Identifies the current display state
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*/
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enum ECalibrationPhase
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{
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CALPHASE_NOT_STARTED = 0, /**< Constructed, but not yet started */
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CALPHASE_UPPER_LEFT, /**< Touch point is in the upper left corner */
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CALPHASE_UPPER_RIGHT, /**< Touch point is in the upper right corner */
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CALPHASE_LOWER_RIGHT, /**< Touch point is in the lower left corner */
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CALPHASE_LOWER_LEFT, /**< Touch point is in the lower right corner */
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CALPHASE_COMPLETE /**< Calibration is complete */
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};
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/**
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* Characterizes one calibration screen
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*/
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struct SCalibScreenInfo
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{
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struct nxgl_point_s pos; /**< The position of the touch point */
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nxgl_mxpixel_t lineColor; /**< The color of the cross-hair lines */
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nxgl_mxpixel_t circleFillColor; /**< The color of the circle */
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};
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/**
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* CCalibration state data
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*/
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CTaskbar *m_taskbar; /**< The taskbar (used to terminate calibration) */
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CFullScreenWindow *m_window; /**< The window for the calibration display */
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CTouchscreen *m_touchscreen; /**< The touchscreen device */
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pthread_t m_thread; /**< The calibration thread ID */
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struct SCalibScreenInfo m_screenInfo; /**< Describes the current calibration display */
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struct nxgl_point_s m_touchPos; /**< This is the last touch position */
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volatile uint8_t m_calthread; /**< Current calibration display state (See ECalibThreadState)*/
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uint8_t m_calphase; /**< Current calibration display state (See ECalibrationPhase)*/
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bool m_stop; /**< True: We have been asked to stop the calibration */
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bool m_touched; /**< True: The screen is touched */
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uint8_t m_touchId; /**< The ID of the touch */
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struct nxgl_point_s m_calibData[CALIB_DATA_POINTS];
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/**
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* Accept raw touchscreen input.
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*
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* @param sample Touchscreen input sample
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*/
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void touchscreenInput(struct touch_sample_s &sample);
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/**
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* Start the calibration thread.
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*
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* @param initialState. The initial state of the calibration thread
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* @return True if the thread was successfully started.
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*/
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bool startCalibration(enum ECalThreadState initialState);
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/**
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* Return true if the calibration thread is running normally. There are
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* lots of potential race conditions. Let's hope that things are running
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* orderly and we that we do not have to concern ourself with them
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*
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* @return True if the calibration thread is runnning normally.
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*/
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inline bool isRunning(void) const
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{
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// What if the boundary states CALTHREAD_STARTED and CALTHREAD_STOPREQUESTED?
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return (m_calthread == CALTHREAD_RUNNING ||
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m_calthread == CALTHREAD_HIDE ||
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m_calthread == CALTHREAD_SHOW);
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}
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/**
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* The calibration thread. This is the entry point of a thread that provides the
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* calibration displays, waits for input, and collects calibration data.
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*
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* @param arg. The CCalibration 'this' pointer cast to a void*.
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* @return This function always returns NULL when the thread exits
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*/
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static FAR void *calibration(FAR void *arg);
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/**
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* This is the calibration state machine. It is called initially and then
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* as new touchscreen data is received.
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*/
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void stateMachine(void);
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/**
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* Presents the next calibration screen
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*/
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void showCalibration(void);
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/**
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* Finish calibration steps and provide the calibration data to the
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* touchscreen driver.
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*/
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void finishCalibration(void);
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/**
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* Given the raw touch data collected by the calibration thread, create the
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* massaged calibration data needed by CTouchscreen.
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*
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* @param data. A reference to the location to save the calibration data
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* @return True if the calibration data was successfully created.
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*/
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bool createCalibrationData(struct SCalibrationData &data);
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public:
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/**
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* CCalibration Constructor
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*
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* @param taskbar. The taskbar instance used to terminate calibration
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* @param window. The window to use for the calibration display
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* @param touchscreen. An instance of the class that wraps the
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* touchscreen device.
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*/
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CCalibration(CTaskbar *taskbar, CFullScreenWindow *window,
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CTouchscreen *touchscreen);
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/**
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* CCalibration Destructor
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*/
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~CCalibration(void);
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/**
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* Each implementation of IApplication must provide a method to recover
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* the contained IApplicationWindow instance.
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*/
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IApplicationWindow *getWindow(void) const;
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/**
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* Get the icon associated with the application
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*
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* @return An instance if IBitmap that may be used to rend the
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* application's icon. This is an new IBitmap instance that must
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* be deleted by the caller when it is no long needed.
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*/
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NXWidgets::IBitmap *getIcon(void);
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/**
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* Get the name string associated with the application
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*
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* @return A copy if CNxString that contains the name of the application.
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*/
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NXWidgets::CNxString getName(void);
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/**
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* Start the application (perhaps in the minimized state).
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*
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* @return True if the application was successfully started.
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*/
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bool run(void);
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/**
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* Stop the application.
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*/
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void stop(void);
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/**
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* Destroy the application and free all of its resources. This method
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* will initiate blocking of messages from the NX server. The server
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* will flush the window message queue and reply with the blocked
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* message. When the block message is received by CWindowMessenger,
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* it will send the destroy message to the start window task which
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* will, finally, safely delete the application.
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*/
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void destroy(void);
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/**
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* The application window is hidden (either it is minimized or it is
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* maximized, but not at the top of the hierarchy
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*/
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void hide(void);
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/**
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* Redraw the entire window. The application has been maximized or
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* otherwise moved to the top of the hierarchy. This method is called from
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* CTaskbar when the application window must be displayed
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*/
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void redraw(void);
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/**
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* Report of this is a "normal" window or a full screen window. The
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* primary purpose of this method is so that window manager will know
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* whether or not it show draw the task bar.
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*
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* @return True if this is a full screen window.
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*/
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bool isFullScreen(void) const;
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};
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class CCalibrationFactory : public IApplicationFactory
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{
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private:
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CTaskbar *m_taskbar; /**< The taskbar */
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CTouchscreen *m_touchscreen; /**< The touchscreen device */
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public:
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/**
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* CCalibrationFactory Constructor
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*
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* @param taskbar. The taskbar instance used to terminate calibration
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* @param touchscreen. An instance of the class that wraps the
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* touchscreen device.
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*/
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CCalibrationFactory(CTaskbar *taskbar, CTouchscreen *touchscreen);
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/**
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* CCalibrationFactory Destructor
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*/
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inline ~CCalibrationFactory(void) { }
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/**
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* Create a new instance of an CCalibration (as IApplication).
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*/
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IApplication *create(void);
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/**
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* Get the icon associated with the application
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*
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* @return An instance if IBitmap that may be used to rend the
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* application's icon. This is an new IBitmap instance that must
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* be deleted by the caller when it is no long needed.
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*/
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NXWidgets::IBitmap *getIcon(void);
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};
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}
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#endif // __INCLUDE_CCALIBRATION_HXX
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