/****************************************************************************
* NxWidgets/libnxwidgets/include/csliderhorizontal.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_CSLIDERHORIZONTAL_HXX
#define __INCLUDE_CSLIDERHORIZONTAL_HXX
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <nuttx/nx/nxglib.h>
#include "cnxwidget.hxx"
#include "cwidgeteventhandler.hxx"
#include "islider.hxx"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Implementation Classes
****************************************************************************/
#if defined(__cplusplus)
namespace NXWidgets
{
class CSliderHorizontalGrip;
class CWidgetControl;
/**
* Widget providing a sliding "grip" that can be moved left and
* right in the "gutter". Essentially a scrollbar, but more
* generic.
*/
class CSliderHorizontal : public ISlider, public CNxWidget, public CWidgetEventHandler
{
protected:
CSliderHorizontalGrip *m_grip; /**< Pointer to the grip. */
nxgl_coord_t m_minimumValue; /**< Minimum value that the grip can represent. */
nxgl_coord_t m_maximumValue; /**< Maximum value that the grip can represent. */
int32_t m_value; /**< Current value of the slider. */
nxgl_coord_t m_minimumGripWidth; /**< Smallest width that the grip can become */
nxgl_coord_t m_pageSize; /**< Value of a page of data, used when clicking
the gutter. */
int32_t m_gutterWidth; /**< Width of the gutter, taking into account
any adjustments made to the width of the grip. */
uint32_t m_contentSize; /**< Number of values in the min/max range. */
/**
* Get the maximum possible value that the slider can represent. Useful when
* using the slider as a scrollbar, as the height of the grip prevents the full
* range of values being accessed (intentionally).
* The returned value is bitshfted left 16 places for more accuracy in fixed-point
* calculations.
*
* @return The maximum possible value that the slider can represent.
*/
int32_t getPhysicalMaximumValueWithBitshift(void) const;
/**
* Get the value represented by the top of the grip.
* return The value represented by the top of the grip.
*/
const int32_t getGripValue(void) const;
/**
* 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);
/**
* Resize the slider to the new dimensions.
*
* @param width The new width.
* @param height The new height.
*/
virtual void onResize(nxgl_coord_t width, nxgl_coord_t height);
/**
* Moves the grip towards the mouse.
*
* @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);
/**
* Copy constructor is protected to prevent usage.
*/
inline CSliderHorizontal(const CSliderHorizontal& sliderHorizontal)
: CNxWidget(sliderHorizontal) { }
/**
* Resize and redraw the grip.
*/
void resizeGrip(void);
public:
/**
* Constructor.
*
* @param pWidgetControl The widget control instance for the window.
* @param x The x coordinate of the slider, relative to its parent.
* @param y The y coordinate of the slider, relative to its parent.
* @param width The width of the slider.
* @param height The height of the slider.
*/
CSliderHorizontal(CWidgetControl *pWidgetControl,
nxgl_coord_t x, nxgl_coord_t y, nxgl_coord_t width,
nxgl_coord_t height);
/**
* Destructor.
*/
virtual inline ~CSliderHorizontal(void) { }
/**
* Get the smallest value that the slider can represent.
*
* @return The smallest value.
*/
inline const nxgl_coord_t getMinimumValue(void) const
{
return m_minimumValue;
}
/**
* Get the largest value that the slider can represent.
*
* @return The largest value.
*/
inline const nxgl_coord_t getMaximumValue(void) const
{
return m_maximumValue;
}
/**
* Get the current value of the slider.
*
* return The current slider value.
*/
inline const nxgl_coord_t getValue(void) const
{
return m_value >> 16;
}
/**
* Get the value represented by the height of the grip.
* For sliders, this would typically be 1 (so each new
* grip position is worth 1). For scrollbars, this
* would be the height of the scrolling widget.
*
* @return The page size.
*/
inline const nxgl_coord_t getPageSize(void) const
{
return m_pageSize;
}
/**
* Set the smallest value that the slider can represent.
*
* @param value The smallest value.
*/
inline void setMinimumValue(const nxgl_coord_t value)
{
m_minimumValue = value;
m_contentSize = m_maximumValue - m_minimumValue + 1;
resizeGrip();
};
/**
* Set the largest value that the slider can represent.
*
* @param value The largest value.
*/
inline void setMaximumValue(const nxgl_coord_t value)
{
m_maximumValue = value;
m_contentSize = m_maximumValue - m_minimumValue + 1;
resizeGrip();
};
/**
* Set the value that of the slider. This will reposition
* and redraw the grip.
*
* @param value The new value.
*/
void setValue(const nxgl_coord_t value);
/**
* Set the value that of the slider. This will reposition and redraw
* the grip. The supplied value should be bitshifted left 16 places.
* This ensures greater accuracy than the standard setValue() method if
* the slider is being used as a scrollbar.
*
* @param value The new value.
*/
void setValueWithBitshift(const int32_t value);
/**
* Set the page size represented by the grip.
*
* @param pageSize The page size.
* @see getPageSize().
*/
inline void setPageSize(const nxgl_coord_t pageSize)
{
m_pageSize = pageSize;
resizeGrip();
};
/**
* Process events fired by the grip.
*
* @param e The event details.
*/
virtual void handleDragEvent(const CWidgetEventArgs &e);
/**
* Get the smallest value that the slider can move through when
* dragged.
*
* @return The smallest value that the slider can move through when
* dragged.
*/
nxgl_coord_t getMinimumStep(void) const;
};
}
#endif // __cplusplus
#endif // __INCLUDE_CSLIDERHORIZONTAL_HXX
