px4-firmware/NxWidgets/libnxwidgets/include/clatchbuttonarray.hxx

/****************************************************************************
 * include/clatchbuttonarray.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_CLATCHBUTTONARRAY_HXX
#define __INCLUDE_CLATCHBUTTONARRAY_HXX

/****************************************************************************
 * Included Files
 ****************************************************************************/
 
#include <nuttx/config.h>

#include <stdint.h>
#include <stdbool.h>

#include <nuttx/nx/nxglib.h>

#include "cstickybuttonarray.hxx"
#include "cwidgetstyle.hxx"

/****************************************************************************
 * Pre-Processor Definitions
 ****************************************************************************/
 
/****************************************************************************
 * Implementation Classes
 ****************************************************************************/
 
#if defined(__cplusplus)

namespace NXWidgets
{
  /**
   * Forward references
   */

  class CWidgetControl;
  class CNxString;

  /**
   * Manages a two-dimensional array of buttons as one widget.  When a button
   * is clicked is latches (i.e., it stays pushed after the press is released.
   * The behavior is then like radio buttons:  Pressing each each button in
   * the array unlatches the previous button and latches the new button.
   *
   * Unlike CLatchButton, pressing the same button more than once has no
   * effect.
   */

  class CLatchButtonArray : public CStickyButtonArray
  {
  protected:
    /**
     * Handles button click events
     *
     * @param x The x coordinate of the click.
     * @param y The y coordinate of the click.
     */

    virtual void onClick(nxgl_coord_t x, nxgl_coord_t y);

    /**
     * Redraws the button.
     *
     * @param x The x coordinate of the mouse.
     * @param y The y coordinate of the mouse.
     */

    /**
     * Copy constructor is protected to prevent usage.
     */

    inline CLatchButtonArray(const CLatchButtonArray &button) : CStickyButtonArray(button) { }

  public:

    /**
     * Constructor for an array of latch buttons.
     *
     * @param pWidgetControl The widget control for the display.
     * @param x The x coordinate of the button array, relative to its parent.
     * @param y The y coordinate of the button array, relative to its parent.
     * @param buttonColumns The number of buttons in one row of the button array
     * @param buttonRows The number of buttons in one column of the button array
     * @param buttonWidth The width of one button
     * @param buttonHeight The height of one button
     * @param style The style that the button should use.  If this is not
     *        specified, the button will use the global default widget
     *        style.
     */

    CLatchButtonArray(CWidgetControl *pWidgetControl,
                       nxgl_coord_t x, nxgl_coord_t y,
                       uint8_t buttonColumns, uint8_t buttonRows,
                       nxgl_coord_t buttonWidth, nxgl_coord_t buttonHeight,
                       CWidgetStyle *style = (CWidgetStyle *)NULL);

    /**
     * CLatchButtonArray Destructor.
     */

    virtual inline ~CLatchButtonArray(void) { }

    /**
     * Return the position of the last latched button (0,0 will be returned
     * the no button has every been latched).  The button at this position
     * is currently latched then, in addition, return true.
     *
     * @param column The location to return the column index of the button
     *    of interest
     * @param row The location to return the row index of the button of
     *    interest
     * @return True if a button in the array is latched
     */

    inline const bool isAnyButtonLatched(int &column, int &row) const
    {
      return isAnyButtonStuckDown(column, row);
    }

    /**
     * Check if this specific button in the array is latched
     *
     * @param column The column of the button to check.
     * @param row The row of the button to check.
     * @return True if this button is clicked
     */

    inline const bool isThisButtonLatched(int column, int row) const
    {
      return isThisButtonStuckDown(column, row);
    }
  };
}

#endif // __cplusplus

#endif // __INCLUDE_CLATCHBUTTONARRAY_HXX