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nuttx-apps/include/graphics/nxwm/ccalibration.hxx

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/****************************************************************************
* apps/include/graphics/nxwm/ccalibration.hxx
*
* Copyright (C) 2012-2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 __APPS_INCLUDE_GRAPHICS_NXWM_CCALIBRATION_HXX
#define __APPS_INCLUDE_GRAPHICS_NXWM_CCALIBRATION_HXX
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/nx/nxglib.h>
#include <pthread.h>
#include <fixedmath.h>
#include "graphics/nxwidgets/cnxstring.hxx"
#include "graphics/nxwidgets/cwidgeteventhandler.hxx"
#include "graphics/nxwidgets/cwidgetcontrol.hxx"
#include "graphics/nxwidgets/clabel.hxx"
#include "graphics/nxwidgets/cnxfont.hxx"
#include "graphics/nxwm/ctaskbar.hxx"
#include "graphics/nxwm/iapplication.hxx"
#include "graphics/nxwm/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
* calibration 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 running 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);
#ifdef CONFIG_NXWM_CALIBRATION_AVERAGE
/**
* 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
*/
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 // __APPS_INCLUDE_GRAPHICS_NXWM_CCALIBRATION_HXX
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