818 lines
25 KiB
C++
818 lines
25 KiB
C++
/****************************************************************************
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* NxWidgets/libnxwidgets/include/cwidgetcontrol.hxx
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*
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* Copyright (C) 2012-2013 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_CWIDGETCONTROLT_HXX
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#define __INCLUDE_CWIDGETCONTROLT_HXX
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <semaphore.h>
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#include <time.h>
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#include "nxconfig.hxx"
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#include "cgraphicsport.hxx"
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#include "cnxwidget.hxx"
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#include "crect.hxx"
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#include "cwidgetstyle.hxx"
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#include "cwindoweventhandler.hxx"
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#include "cwindoweventhandlerlist.hxx"
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#include "tnxarray.hxx"
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Implementation Classes
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****************************************************************************/
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#if defined(__cplusplus)
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namespace NXWidgets
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{
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class INxWindow;
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class CNxWidget;
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/**
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* Class providing a top-level widget and an interface to the CWidgetControl
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* widget hierarchy.
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*
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* There are three instances that represent an NX window from the
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* perspective of NXWidgets.
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*
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* - There is one widget control instance per NX window,
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* - One CCallback instance per window,
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* - One window instance.
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*
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* There a various kinds of of window instances, but each inherits
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* (1) CCallback and dispatches the Windows callbacks and (2) INxWindow
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* that describes the common window behavior.
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*/
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class CWidgetControl
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{
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protected:
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/**
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* Structure holding the status of the Mouse or Touchscreen. There must
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* be one instance of this structure per window instance. The
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* content of this structure is update by the CGraphicsPort on each
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* NX mouse callback
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*/
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#ifdef CONFIG_NX_XYINPUT
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struct SXYInput
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{
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// A touchscreen has no buttons. However, the convention is that
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// touchscreen contacts are reported with the LEFT button pressed.
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// The loss of contct is reported with no buttons pressed.
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#if 0 // Center and right buttons are not used
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// But only a mouse has center and right buttons
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uint16_t leftPressed : 1; /**< Left button pressed (or
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touchscreen contact) */
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uint16_t centerPressed : 1; /**< Center button pressed (not
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used with touchscreen) */
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uint16_t rightPressed : 1; /**< Right button pressed (not
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used with touchscreen) */
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uint16_t leftHeld : 1; /**< Left button held down (or
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touchscreen contact) */
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uint16_t centerHeld : 1; /**< Center button held down
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(not used with touchscreen) */
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uint16_t rightHeld : 1; /**< Right button held down
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(not used with touchscreen) */
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uint16_t leftDrag : 1; /**< Left button held down (or
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touchscreen contact) */
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uint16_t centerDrag : 1; /**< Center button held down (or
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touchscreen contact) */
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uint16_t rightDrag : 1; /**< Right button held down (or
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touchscreen contact) */
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uint16_t leftReleased : 1; /**< Left button release (or
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loss of touchscreen contact) */
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uint16_t centerReleased : 1; /**< Center button release (or
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loss of touchscreen contact) */
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uint16_t rightReleased : 1; /**< Right button release (or
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loss of touchscreen contact) */
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uint16_t doubleClick : 1; /**< Left button double click */
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uint16_t unused : 3; /**< Padding bits */
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#else
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uint8_t leftPressed : 1; /**< Left button pressed (or
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touchscreen contact) */
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uint8_t leftHeld : 1; /**< Left button held down (or
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touchscreen contact) */
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uint8_t leftDrag : 1; /**< Left button held down (or
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touchscreen contact) */
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uint8_t leftReleased : 1; /**< Left button release (or
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loss of touchscreen contact) */
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uint8_t doubleClick : 1; /**< Left button double click */
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uint8_t unused : 3; /**< Padding bits */
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#endif
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// These are attributes common to both touchscreen and mouse input devices
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nxgl_coord_t x; /**< Current X coordinate of
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the mouse/touch */
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nxgl_coord_t y; /**< Current Y coordinate of
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the mouse/touch */
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nxgl_coord_t lastX; /**< X coordinate of the mouse
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at the previous poll */
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nxgl_coord_t lastY; /**< Y coordinate of the mouse
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at the previous poll */
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struct timespec leftPressTime; /**< Time the left button was
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pressed */
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struct timespec leftReleaseTime; /**< Time the left button was
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released */
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};
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#endif
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/**
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* State data
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*/
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CGraphicsPort *m_port; /**< The graphics port
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that is used for
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drawing on this window */
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TNxArray<CNxWidget*> m_deleteQueue; /**< Array of widgets
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awaiting deletion. */
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TNxArray<CNxWidget*> m_widgets; /**< List of controlled
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widgets. */
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bool m_haveGeometry; /**< True: indicates that we
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have valid geometry data. */
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#ifdef CONFIG_NXWIDGET_EVENTWAIT
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bool m_waiting; /**< True: Extternal logic waiting for
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window event */
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sem_t m_waitSem; /**< External loops waits for
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events on this semaphore */
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#endif
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/**
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* I/O
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*/
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#ifdef CONFIG_NX_XYINPUT
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struct SXYInput m_xyinput; /**< Current XY input
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device state */
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#endif
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CNxWidget *m_clickedWidget; /**< Pointer to the widget
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that is clicked. */
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CNxWidget *m_focusedWidget; /**< Pointer to the widget
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that received keyboard
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input. */
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uint8_t m_kbdbuf[CONFIG_NXWIDGETS_KBDBUFFER_SIZE];
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uint8_t m_nCh; /**< Number of buffered
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keyboard characters */
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uint8_t m_controls[CONFIG_NXWIDGETS_CURSORCONTROL_SIZE];
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uint8_t m_nCc; /**< Number of buffered
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cursor controls */
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/**
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* The following were picked off from the position callback.
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*/
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NXHANDLE m_hWindow; /**< Handle to the NX window */
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struct nxgl_size_s m_size; /**< Size of the window */
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struct nxgl_point_s m_pos; /**< Position in display space */
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struct nxgl_rect_s m_bounds; /**< Size of the display */
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#ifdef CONFIG_NX_MULTIUSER
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sem_t m_geoSem; /**< Posted when geometry is valid */
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sem_t m_boundsSem; /**< Posted when bounds are valid */
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#endif
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CWindowEventHandlerList m_eventHandlers; /**< List of event handlers. */
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/**
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* Style
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*/
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CWidgetStyle m_style; /**< Default style used by all
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widgets in the window. */
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/**
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* Copy a widget style
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*
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* @param dest The destination style
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* @param src The source to use
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*/
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void copyWidgetStyle(CWidgetStyle *dest, const CWidgetStyle *src);
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/**
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* Return the elapsed time in millisconds
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*
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* @param startTime A time in the past from which to compute the elapsed time.
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* @return The elapsed time since startTime
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*/
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uint32_t elapsedTime(FAR const struct timespec *startTime);
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/**
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* Pass clicks to the widget hierarchy. Closes the context menu if
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* the clicked widget is not the context menu. If a single widget
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* is supplied, only that widget is sent the click.
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*
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* @param x Click xcoordinate.
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* @param y Click ycoordinate.
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* @param widget. Specific widget to poll. Use NULL to run the
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* all widgets in the window.
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*/
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void handleLeftClick(nxgl_coord_t x, nxgl_coord_t y, CNxWidget *widget);
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/**
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* Get the index of the specified controlled widget.
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*
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* @param widget The widget to get the index of.
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* @return The index of the widget. -1 if the widget is not found.
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*/
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const int getWidgetIndex(const CNxWidget *widget) const;
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/**
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* Delete any widgets in the deletion queue.
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*/
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void processDeleteQueue(void);
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/**
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* Process mouse/touchscreen events and send throughout the hierarchy.
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*
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* @param widget. Specific widget to poll. Use NULL to run the
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* all widgets in the window.
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* @return True means a mouse event occurred
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*/
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bool pollMouseEvents(CNxWidget* widget);
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/**
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* Process keypad events and send throughout the hierarchy.
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*
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* @return True means a keyboard event occurred
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*/
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bool pollKeyboardEvents(void);
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/**
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* Process cursor control events and send throughout the hierarchy.
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*
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* @return True means a cursor control event was processes
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*/
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bool pollCursorControlEvents(void);
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/**
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* Wake up and external logic that is waiting for a window event.
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*/
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#ifdef CONFIG_NXWIDGET_EVENTWAIT
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void postWindowEvent(void);
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#endif
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/**
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* Take the geometry semaphore (handling signal interruptions)
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*/
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#ifdef CONFIG_NX_MULTIUSER
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void takeGeoSem(void);
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#else
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inline void takeGeoSem(void) {}
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#endif
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/**
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* Give the geometry semaphore
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*/
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inline void giveGeoSem(void)
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{
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#ifdef CONFIG_NX_MULTIUSER
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sem_post(&m_geoSem);
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#endif
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}
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/**
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* Wait for geometry data
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*/
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inline void waitGeoData(void)
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{
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takeGeoSem();
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giveGeoSem();
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}
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/**
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* Take the bounds semaphore (handling signal interruptions)
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*/
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#ifdef CONFIG_NX_MULTIUSER
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void takeBoundsSem(void);
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#else
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inline void takeBoundsSem(void) {}
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#endif
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/**
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* Give the bounds semaphore
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*/
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inline void giveBoundsSem(void)
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{
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#ifdef CONFIG_NX_MULTIUSER
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sem_post(&m_boundsSem);
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#endif
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}
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/**
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* Wait for bounds data
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*/
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inline void waitBoundsData(void)
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{
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takeBoundsSem();
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giveBoundsSem();
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}
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#ifdef CONFIG_NX_XYINPUT
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/**
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* Clear all mouse events
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*/
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void clearMouseEvents(void);
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#endif
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public:
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/**
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* Constructor
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*
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* @param style The default style that all widgets on this display
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* should use. If this is not specified, the widget will use the
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* values stored in the defaultCWidgetStyle object.
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*/
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CWidgetControl(FAR const CWidgetStyle *style = (const CWidgetStyle *)NULL);
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/**
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* Destructor.
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*/
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virtual ~CWidgetControl(void);
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/**
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* Wait for an interesting window event to occur (like a mouse or keyboard event)
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* Caller's should exercise care to assure that the test for waiting and this
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* call are "atomic" .. perhaps by locking the scheduler like:
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*
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* sched_lock();
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* <check for events>
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* if (<no interesting events>)
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* {
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* window->waitForWindowEvent();
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* }
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* sched_unlock();
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*/
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#ifdef CONFIG_NXWIDGET_EVENTWAIT
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void waitForWindowEvent(void);
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#endif
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/**
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* Is external logic awaiting for a window event?
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*
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* @return True if the widget if external logic is waiting.
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*/
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#ifdef CONFIG_NXWIDGET_EVENTWAIT
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inline const bool isWaiting(void) const
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{
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return m_waiting;
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}
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#endif
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/**
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* Run all code that needs to take place on a periodic basis.
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* This method normally called externally... either periodically
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* or when a window event is detected. If CONFIG_NXWIDGET_EVENTWAIT
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* is defined, then external logic want call waitWindow event and
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* when awakened, they chould call this function. As an example:
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*
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* for (;;)
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* {
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* sched_lock(); // Make the sequence atomic
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* if (!window->pollEvents(0))
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* {
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* window->waitWindowEvent();
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* }
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* sched_unlock();
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* }
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*
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* This method is just a wrapper simply calls the followi.
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*
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* processDeleteQueue()
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* pollMouseEvents(widget)
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* pollKeyboardEvents()
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* pollCursorControlEvents()
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*
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* @param widget. Specific widget to poll. Use NULL to run the
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* all widgets in the window.
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* @return True means some interesting event occurred
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*/
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bool pollEvents(CNxWidget *widget = (CNxWidget *)NULL);
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/**
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* Swaps the depth of the supplied widget.
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* This function presumes that all child widgets are screens.
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*
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* @param widget The widget to be depth-swapped.
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* @return True if the depth swap occurred.
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*/
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bool swapWidgetDepth(CNxWidget *widget);
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/**
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* Add another widget to be managed by this control instance
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*
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* @param widget The widget to be controlled.
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*/
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inline void addControlledWidget(CNxWidget* widget)
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{
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m_widgets.push_back(widget);
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}
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/**
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* Remove a controlled widget
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*
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* @param widget The widget to be removed
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*/
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void removeControlledWidget(CNxWidget* widget);
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/**
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* Get the number of controlled widgets.
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*
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* @return The number of child widgets belonging to this widget.
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*/
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inline const int getControlledWidgetCount(void) const
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{
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return m_widgets.size();
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}
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/**
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* Add a widget to the list of widgets to be deleted.
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* Must never be called by anything other than the framework itself.
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*
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* @param widget The widget to add to the delete queue.
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*/
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void addToDeleteQueue(CNxWidget *widget);
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/**
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* Set the clicked widget pointer. Note that this should not be
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* called by code other than within the CWidgetControl library itself.
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*
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* @param widget The new clicked widget.
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*/
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void setClickedWidget(CNxWidget *widget);
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/**
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* Get the clicked widget pointer.
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*
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* @return Pointer to the clicked widget.
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*/
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inline CNxWidget *getClickedWidget(void)
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{
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return m_clickedWidget;
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}
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/**
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* Set the focused widget that will receive keyboard input.
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*
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* @param widget The new focused widget.
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*/
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void setFocusedWidget(CNxWidget *widget);
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/**
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* Reset the focused widget so that it will no longer receive keyboard input.
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*
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* @param widget The new focused widget.
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*/
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void clearFocusedWidget(CNxWidget *widget)
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{
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if (widget == m_focusedWidget)
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{
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m_focusedWidget = (CNxWidget *)NULL;
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}
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}
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/**
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* Get the focused widget pointer.
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*
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* @return Pointer to the focused widget.
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*/
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inline CNxWidget *getFocusedWidget(void)
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{
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return m_focusedWidget;
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}
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/**
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* Check for the occurrence of a double click.
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*
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* @return Pointer to the clicked widget.
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*/
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inline bool doubleClick(void)
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{
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return (bool)m_xyinput.doubleClick;
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}
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/**
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* Get the default widget style for this window.
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*
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* @param style. The location to return the widget's style
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*/
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inline void getWidgetStyle(CWidgetStyle *style)
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{
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copyWidgetStyle(style, &m_style);
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}
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/**
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* Set the default widget style for this window.
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*
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* @param style. The new widget style to copy.
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*/
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inline void setWidgetStyle(const CWidgetStyle *style)
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{
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copyWidgetStyle(&m_style, style);
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}
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/**
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* 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 coordinates. This
|
|
* method may need to wait until bounds data is available.
|
|
*
|
|
* @return This function returns the window handle.
|
|
*/
|
|
|
|
inline CRect getWindowBoundingBox(void)
|
|
{
|
|
waitBoundsData();
|
|
return CRect(&m_bounds);
|
|
}
|
|
|
|
inline void getWindowBoundingBox(FAR struct nxgl_rect_s *bounds)
|
|
{
|
|
waitBoundsData();
|
|
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
|