nuttx-apps/libnxwidgets/include/cprogressbar.hxx

/****************************************************************************
 * NxWidgets/libnxwidgets/include/cprogressbar.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.
 *
 ****************************************************************************
 *
 * Portions of this package derive from Woopsi (http://woopsi.org/) and
 * portions are original efforts.  It is difficult to determine at this
 * point what parts are original efforts and which parts derive from Woopsi.
 * However, in any event, the work of  Antony Dzeryn will be acknowledged
 * in most NxWidget files.  Thanks Antony!
 *
 *   Copyright (c) 2007-2011, Antony Dzeryn
 *   All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * 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.
 * * Neither the names "Woopsi", "Simian Zombie" nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Antony Dzeryn ``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 Antony Dzeryn 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_CPROGRESSBAR_HXX
#define __INCLUDE_CPROGRESSBAR_HXX

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

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

#include <nuttx/nx/nxglib.h>

#include "cnxwidget.hxx"

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

namespace NXWidgets
{
  /**
   * Forward references
   */

  class CWidgetControl;

  /**
   * Widget providing a horizontal progress bar.
   */

  class CProgressBar : public CNxWidget
  {
  protected:
    int16_t m_minimumValue;    /**< Minimum value that the grip can represent. */
    int16_t m_maximumValue;    /**< Maximum value that the grip can represent. */
    int16_t m_value;           /**< Value of the progress bar. */
    bool m_showPercentageText; /**< If true, completion percentage is drawn
                                    over the bar. */

    /**
     * Draw the area of this widget that falls within the clipping region.
     * Called by the redraw() function to draw all visible regions.
     *
     * @param port The CGraphicsPort to draw to.
     * @see redraw()
     */

    virtual void drawContents(CGraphicsPort *port);

    /**
     * Draw the area of this widget that falls within the clipping region.
     * Called by the redraw() function to draw all visible regions.
     *
     * @param port The CGraphicsPort to draw to.
     * @see redraw()
     */

    virtual void drawBorder(CGraphicsPort *port);

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

    inline CProgressBar(const CProgressBar &progressBar) : CNxWidget(progressBar) { }

  public:

    /**
     * Constructor.
     *
     * @param pWidgetControl The widget control for the display.
     * @param x The x coordinate of the progress bar, relative to its parent.
     * @param y The y coordinate of the progress bar, relative to its parent.
     * @param width The width of the progress bar.
     * @param height The height of the progress bar.
     */

    CProgressBar(CWidgetControl *pWidgetControl,
                 nxgl_coord_t x, nxgl_coord_t y,
                 nxgl_coord_t width, nxgl_coord_t height);

    /**
     * Destructor.
     */

    virtual inline ~CProgressBar(void) { }

    /**
     * Get the smallest value that the progress bar can represent.
     *
     * @return The smallest value.
     */

    inline const int16_t getMinimumValue(void) const
    {
      return m_minimumValue;
    }

    /**
     * Get the largest value that the progress bar can represent.
     *
     * @return The largest value.
     */

    inline const int16_t getMaximumValue(void) const
    {
      return m_maximumValue;
    }

    /**
     * Get the current value of the progress bar.
     * return The current progress bar value.
     */

    inline const int16_t getValue(void) const
    {
      return m_value; 
    }

    /**
     * Set the smallest value that the progress bar can represent.
     *
     * @param value The smallest value.
     */

    inline void setMinimumValue(const int16_t value)
    {
      m_minimumValue = value;
    }

    /**
     * Set the largest value that the progress bar can represent.
     *
     * @param value The largest value.
     */

    inline void setMaximumValue(const int16_t value)
    {
      m_maximumValue = value;
    }

    /**
     * Set the value that of the progress bar. 
     *
     * @param value The new value.
     */

    void setValue(const int16_t value);

    /**
     * Shows the percentage text over the bar.
     */

    inline void showPercentageText(void)
    {
      m_showPercentageText = true;
      redraw();
    }

    /**
     * Hides the percentage text over the bar.
     */

    inline void hidePercentageText(void)
    {
      m_showPercentageText = false;
      redraw();
    }
  };
}

#endif // __cplusplus

#endif // __INCLUDE_CPROGRESSBAR_HXX