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px4_autopilot/NxWidgets/libnxwidgets/include/cwidgetcontrol.hxx

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/****************************************************************************
* NxWidgets/libnxwidgets/include/cwidgetcontrol.hxx
*
* Copyright (C) 2012 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 __INCLUDE_CWIDGETCONTROLT_HXX
#define __INCLUDE_CWIDGETCONTROLT_HXX
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <semaphore.h>
#include <time.h>
#include "nxconfig.hxx"
#include "cgraphicsport.hxx"
#include "cnxwidget.hxx"
#include "crect.hxx"
#include "cwidgetstyle.hxx"
#include "cwindoweventhandler.hxx"
#include "cwindoweventhandlerlist.hxx"
#include "tnxarray.hxx"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Implementation Classes
****************************************************************************/
#if defined(__cplusplus)
namespace NXWidgets
{
class INxWindow;
class CNxWidget;
/**
* Class providing a top-level widget and an interface to the CWidgetControl
* widget hierarchy.
*
* There are three instances that represent an NX window from the
* perspective of NXWidgets.
*
* - There is one widget control instance per NX window,
* - One CCallback instance per window,
* - One window instance.
*
* There a various kinds of of window instances, but each inherits
* (1) CCallback and dispatches the Windows callbacks and (2) INxWindow
* that describes the common window behavior.
*/
class CWidgetControl
{
protected:
/**
* Structure holding the status of the Mouse or Touchscreen. There must
* be one instance of this structure per window instance. The
* content of this structure is update by the CGraphicsPort on each
* NX mouse callback
*/
struct SMouse
{
#if 0 // Center and right buttons are not used
uint16_t leftPressed : 1; /**< Left button pressed (or
touchscreen contact) */
uint16_t centerPressed : 1; /**< Center button pressed (not
used with touchscreen) */
uint16_t rightPressed : 1; /**< Right button pressed (not
used with touchscreen) */
uint16_t leftHeld : 1; /**< Left button held down (or
touchscreen contact) */
uint16_t centerHeld : 1; /**< Center button held down
(not used with touchscreen) */
uint16_t rightHeld : 1; /**< Right button held down
(not used with touchscreen) */
uint16_t leftDrag : 1; /**< Left button held down (or
touchscreen contact) */
uint16_t centerDrag : 1; /**< Center button held down (or
touchscreen contact) */
uint16_t rightDrag : 1; /**< Right button held down (or
touchscreen contact) */
uint16_t leftReleased : 1; /**< Left button release (or
loss of touchscreen contact) */
uint16_t centerReleased : 1; /**< Center button release (or
loss of touchscreen contact) */
uint16_t rightReleased : 1; /**< Right button release (or
loss of touchscreen contact) */
uint16_t doubleClick : 1; /**< Left button double click */
uint16_t unused : 3; /**< Padding bits */
#else
uint8_t leftPressed : 1; /**< Left button pressed (or
touchscreen contact) */
uint8_t leftHeld : 1; /**< Left button held down (or
touchscreen contact) */
uint8_t leftDrag : 1; /**< Left button held down (or
touchscreen contact) */
uint8_t leftReleased : 1; /**< Left button release (or
loss of touchscreen contact) */
uint8_t doubleClick : 1; /**< Left button double click */
uint8_t unused : 3; /**< Padding bits */
#endif
nxgl_coord_t x; /**< Current X coordinate of
the mouse/touch */
nxgl_coord_t y; /**< Current Y coordinate of
the mouse/touch */
nxgl_coord_t lastX; /**< X coordinate of the mouse
at the previous poll */
nxgl_coord_t lastY; /**< Y coordinate of the mouse
at the previous poll */
struct timespec leftPressTime; /**< Time the left button was
pressed */
struct timespec leftReleaseTime; /**< Time the left button was
released */
};
/**
* State data
*/
CGraphicsPort *m_port; /**< The graphics port
that is used for
drawing on this window */
TNxArray<CNxWidget*> m_deleteQueue; /**< Array of widgets
awaiting deletion. */
TNxArray<CNxWidget*> m_widgets; /**< List of controlled
widgets. */
bool m_haveGeometry; /**< True: indicates that we
have valid geometry data. */
#ifdef CONFIG_NXWIDGET_EVENTWAIT
bool m_waiting; /**< True: Extternal logic waiting for
window event */
sem_t m_waitSem; /**< External loops waits for
events on this semaphore */
#endif
/**
* I/O
*/
struct SMouse m_mouse; /**< Current pointer
device state */
CNxWidget *m_clickedWidget; /**< Pointer to the widget
that is clicked. */
CNxWidget *m_focusedWidget; /**< Pointer to the widget
that received keyboard
input. */
uint8_t m_kbdbuf[CONFIG_NXWIDGETS_KBDBUFFER_SIZE];
uint8_t m_nCh; /**< Number of buffered
keyboard characters */
uint8_t m_controls[CONFIG_NXWIDGETS_CURSORCONTROL_SIZE];
uint8_t m_nCc; /**< Number of buffered
cursor controls */
/**
* The following were picked off from the position callback.
*/
NXHANDLE m_hWindow; /**< Handle to the NX window */
struct nxgl_size_s m_size; /**< Size of the window */
struct nxgl_point_s m_pos; /**< Position in display space */
struct nxgl_rect_s m_bounds; /**< Size of the display */
#ifdef CONFIG_NX_MULTIUSER
sem_t m_geoSem; /**< Posted when geometry is valid */
#endif
CWindowEventHandlerList m_eventHandlers; /**< List of event handlers. */
/**
* Style
*/
CWidgetStyle m_style; /**< Default style used by all
widgets in the window. */
/**
* Copy a widget style
*
* @param dest The destination style
* @param src The source to use
*/
void copyWidgetStyle(CWidgetStyle *dest, const CWidgetStyle *src);
/**
* Return the elapsed time in millisconds
*
* @param startTime A time in the past from which to compute the elapsed time.
* @return The elapsed time since startTime
*/
uint32_t elapsedTime(FAR const struct timespec *startTime);
/**
* Pass clicks to the widget hierarchy. Closes the context menu if
* the clicked widget is not the context menu. If a single widget
* is supplied, only that widget is sent the click.
*
* @param x Click xcoordinate.
* @param y Click ycoordinate.
* @param widget. Specific widget to poll. Use NULL to run the
* all widgets in the window.
*/
void handleLeftClick(nxgl_coord_t x, nxgl_coord_t y, CNxWidget *widget);
/**
* Get the index of the specified controlled widget.
*
* @param widget The widget to get the index of.
* @return The index of the widget. -1 if the widget is not found.
*/
const int getWidgetIndex(const CNxWidget *widget) const;
/**
* Delete any widgets in the deletion queue.
*/
void processDeleteQueue(void);
/**
* Process mouse/touchscreen events and send throughout the hierarchy.
*
* @param widget. Specific widget to poll. Use NULL to run the
* all widgets in the window.
* @return True means a mouse event occurred
*/
bool pollMouseEvents(CNxWidget* widget);
/**
* Process keypad events and send throughout the hierarchy.
*
* @return True means a keyboard event occurred
*/
bool pollKeyboardEvents(void);
/**
* Process cursor control events and send throughout the hierarchy.
*
* @return True means a cursor control event was processes
*/
bool pollCursorControlEvents(void);
/**
* Wake up and external logic that is waiting for a window event.
*/
#ifdef CONFIG_NXWIDGET_EVENTWAIT
void postWindowEvent(void);
#endif
/**
* Take the geometry semaphore (handling signal interruptions)
*/
#ifdef CONFIG_NX_MULTIUSER
void takeGeoSem(void);
#else
inline void takeGeoSem(void) {}
#endif
/**
* Give the geometry semaphore
*/
inline void giveGeoSem(void)
{
#ifdef CONFIG_NX_MULTIUSER
sem_post(&m_geoSem);
#endif
}
/**
* Wait for geometry data
*/
inline void waitGeoData(void)
{
takeGeoSem();
giveGeoSem();
}
/**
* Clear all mouse events
*/
void clearMouseEvents(void);
public:
/**
* Constructor
*
* @param style The default style that all widgets on this display
* should use. If this is not specified, the widget will use the
* values stored in the defaultCWidgetStyle object.
*/
CWidgetControl(FAR const CWidgetStyle *style = (const CWidgetStyle *)NULL);
/**
* Destructor.
*/
virtual ~CWidgetControl(void);
/**
* Wait for an interesting window event to occur (like a mouse or keyboard event)
* Caller's should exercise care to assure that the test for waiting and this
* call are "atomic" .. perhaps by locking the scheduler like:
*
* sched_lock();
* <check for events>
* if (<no interesting events>)
* {
* window->waitForWindowEvent();
* }
* sched_unlock();
*/
#ifdef CONFIG_NXWIDGET_EVENTWAIT
void waitForWindowEvent(void);
#endif
/**
* Is external logic awaiting for a window event?
*
* @return True if the widget if external logic is waiting.
*/
#ifdef CONFIG_NXWIDGET_EVENTWAIT
inline const bool isWaiting(void) const
{
return m_waiting;
}
#endif
/**
* Run all code that needs to take place on a periodic basis.
* This method normally called externally... either periodically
* or when a window event is detected. If CONFIG_NXWIDGET_EVENTWAIT
* is defined, then external logic want call waitWindow event and
* when awakened, they chould call this function. As an example:
*
* for (;;)
* {
* sched_lock(); // Make the sequence atomic
* if (!window->pollEvents(0))
* {
* window->waitWindowEvent();
* }
* sched_unlock();
* }
*
* This method is just a wrapper simply calls the followi.
*
* processDeleteQueue()
* pollMouseEvents(widget)
* pollKeyboardEvents()
* pollCursorControlEvents()
*
* @param widget. Specific widget to poll. Use NULL to run the
* all widgets in the window.
* @return True means some interesting event occurred
*/
bool pollEvents(CNxWidget *widget = (CNxWidget *)NULL);
/**
* Swaps the depth of the supplied widget.
* This function presumes that all child widgets are screens.
*
* @param widget The widget to be depth-swapped.
* @return True if the depth swap occurred.
*/
bool swapWidgetDepth(CNxWidget *widget);
/**
* Add another widget to be managed by this control instance
*
* @param widget The widget to be controlled.
*/
inline void addControlledWidget(CNxWidget* widget)
{
m_widgets.push_back(widget);
}
/**
* Remove a controlled widget
*
* @param widget The widget to be removed
*/
void removeControlledWidget(CNxWidget* widget);
/**
* Get the number of controlled widgets.
*
* @return The number of child widgets belonging to this widget.
*/
inline const int getControlledWidgetCount(void) const
{
return m_widgets.size();
}
/**
* Add a widget to the list of widgets to be deleted.
* Must never be called by anything other than the framework itself.
*
* @param widget The widget to add to the delete queue.
*/
void addToDeleteQueue(CNxWidget *widget);
/**
* Set the clicked widget pointer. Note that this should not be
* called by code other than within the CWidgetControl library itself.
*
* @param widget The new clicked widget.
*/
void setClickedWidget(CNxWidget *widget);
/**
* Get the clicked widget pointer.
*
* @return Pointer to the clicked widget.
*/
inline CNxWidget *getClickedWidget(void)
{
return m_clickedWidget;
}
/**
* Set the focused widget that will receive keyboard input.
*
* @param widget The new focused widget.
*/
void setFocusedWidget(CNxWidget *widget);
/**
* Reset the focused widget so that it will no longer receive keyboard input.
*
* @param widget The new focused widget.
*/
void clearFocusedWidget(CNxWidget *widget)
{
if (widget == m_focusedWidget)
{
m_focusedWidget = (CNxWidget *)NULL;
}
}
/**
* Get the focused widget pointer.
*
* @return Pointer to the focused widget.
*/
inline CNxWidget *getFocusedWidget(void)
{
return m_focusedWidget;
}
/**
* Check for the occurrence of a double click.
*
* @return Pointer to the clicked widget.
*/
inline bool doubleClick(void)
{
return (bool)m_mouse.doubleClick;
}
/**
* Get the default widget style for this window.
*
* @param style. The location to return the widget's style
*/
inline void getWidgetStyle(CWidgetStyle *style)
{
copyWidgetStyle(style, &m_style);
}
/**
* Set the default widget style for this window.
*
* @param style. The new widget style to copy.
*/
inline void setWidgetStyle(const CWidgetStyle *style)
{
copyWidgetStyle(&m_style, style);
}
/**
* These remaining methods are used by the CCallback instance to
* provide notifications of certain events.
*/
/**
* This event will occur when the position or size of the underlying
* window occurs.
*
* @param hWindow The window handle that should be used to communicate
* with the window
* @param pos The position of the window in the physical device space.
* @param size The size of the window.
* @param bounds The size of the underlying display (pixels x rows)
*/
void geometryEvent(NXHANDLE hWindow,
const struct nxgl_size_s *size,
const struct nxgl_point_s *pos,
const struct nxgl_rect_s *bounds);
/**
* This event will occur when the a portion of the window that was
* previously obscured is now exposed.
*
* @param nxRect The region in the window that must be redrawn.
* @param more True means that more re-draw requests will follow
*/
void redrawEvent(FAR const struct nxgl_rect_s *nxRect, bool more);
/**
* This event means that new mouse data is available for the window.
*
* @param pos The (x,y) position of the mouse.
* @param buttons See NX_MOUSE_* definitions.
*/
void newMouseEvent(FAR const struct nxgl_point_s *pos, uint8_t buttons);
/**
* This event means that keyboard/keypad data is available for the window.
*
* @param nCh The number of characters that are available in pStr[].
* @param pStr The array of characters.
*/
#ifdef CONFIG_NX_KBD
void newKeyboardEvent(uint8_t nCh, FAR const uint8_t *pStr);
#endif
/**
* This event is the response from nx_block (or nxtk_block). Those
* blocking interfaces are used to assure that no further messages are
* directed to the window. Receipt of the blocked callback signifies
* that (1) there are no further pending events and (2) that the
* window is now 'defunct' and will receive no further events.
*
* This event supports coordinated destruction of a window in multi-
* user mode. In multi-use mode, the client window logic must stay
* intact until all of the queued callbacks are processed. Then the
* window may be safely closed. Closing the window prior with pending
* callbacks can lead to bad behavior when the callback is executed.
*
* @param arg - User provided argument (see nx_block or nxtk_block)
*/
#ifdef CONFIG_NX_MULTIUSER
inline void windowBlocked(FAR void *arg)
{
m_eventHandlers.raiseBlockedEvent(arg);
}
#endif
/**
* This event means that cursor control data is available for the window.
*
* @param cursorControl The cursor control code received.
*/
void newCursorControlEvent(ECursorControl cursorControl);
/**
* Get the window handle reported on the first position callback.
*
* @return This function returns the window handle.
*/
inline NXHANDLE getWindowHandle(void)
{
return m_hWindow;
}
/**
* Get the window bounding box in physical display coordinated. This
* method may need to wait until geometry data is available.
*
* @return This function returns the window handle.
*/
inline CRect getWindowBoundingBox(void)
{
waitGeoData();
return CRect(&m_bounds);
}
inline void getWindowBoundingBox(FAR struct nxgl_rect_s *bounds)
{
waitGeoData();
nxgl_rectcopy(bounds, &m_bounds);
}
/**
* Get the position of the window (as reported by the last NX callback). This
* method may need to wait until geometry data is available.
*
* @return The position.
*/
inline bool getWindowPosition(FAR struct nxgl_point_s *pos)
{
waitGeoData();
pos->x = m_pos.x;
pos->y = m_pos.y;
return true;
}
/**
* Get the size of the window (as reported by the last NX callback). This
* method may need to wait until geometry data is available.
*
* @return The size.
*/
inline bool getWindowSize(FAR struct nxgl_size_s *size)
{
waitGeoData();
size->h = m_size.h;
size->w = m_size.w;
return true;
}
/**
* Get the width of the window (as reported by the last NX callback). This
* method may need to wait until geometry data is available.
*
* @return The size.
*/
inline nxgl_coord_t getWindowWidth(void)
{
waitGeoData();
return m_size.w;
}
/**
* Get the height of the window (as reported by the last NX callback). This
* method may need to wait until geometry data is available.
*
* @return The size.
*/
inline nxgl_coord_t getWindowHeight(void)
{
waitGeoData();
return m_size.h;
}
/**
* The creation sequence is:
*
* 1) Create a dumb CWigetControl instance
* 2) Pass the dumb CWidgetControl instance to the window constructor
* that inherits from INxWindow.
* 3) The call this method with the static_cast to INxWindow to,
* finally, create the CGraphicsPort for this window.
* 4) After that, the fully smartend CWidgetControl instance can
* be used to generate additional widgets.
*
* @param window The instance of INxWindow needed to construct the
* CGraphicsPort instance
*/
bool createGraphicsPort(INxWindow *window);
/**
* Get the CGraphicsPort instance for drawing on this window
*/
inline CGraphicsPort *getGraphicsPort(void)
{
return m_port;
}
/**
* Adds a window event handler. The window handler will receive
* notification all NX events received by this window\.
*
* @param eventHandler A pointer to the event handler.
*/
inline void addWindowEventHandler(CWindowEventHandler *eventHandler)
{
m_eventHandlers.addWindowEventHandler(eventHandler);
}
/**
* Remove a window event handler.
*
* @param eventHandler A pointer to the event handler to remove.
*/
inline void removeWindowEventHandler(CWindowEventHandler *eventHandler)
{
m_eventHandlers.removeWindowEventHandler(eventHandler);
}
};
}
#endif // __cplusplus
#endif // __INCLUDE_CWIDGETCONTROLT_HXX