/**************************************************************************** * apps/include/graphics/nxwidgets/islider.hxx * * Copyright (C) 2012, 2014 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 __APPS_INCLUDE_GRAPHICS_NXWIDGETS_ISLIDER_HXX #define __APPS_INCLUDE_GRAPHICS_NXWIDGETS_ISLIDER_HXX /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include /**************************************************************************** * Pre-Processor Definitions ****************************************************************************/ /**************************************************************************** * Abstract Base Classes ****************************************************************************/ #if defined(__cplusplus) namespace NXWidgets { /** * Defines the interface for slider widgets. */ class ISlider { public: /** * A virtual destructor is required in order to override the ISlider * destructor. We do this because if we delete ISlider, we want the * destructor of the class that inherits from ISlider to run, not this * one. */ virtual ~ISlider(void) { } /** * Get the smallest value that the slider can represent. * * @return The smallest value. */ virtual const int getMinimumValue(void) const = 0; /** * Get the largest value that the slider can represent. * * @return The largest value. */ virtual const int getMaximumValue(void) const = 0; /** * Get the current value of the slider. * * return The current slider value. */ virtual const int getValue(void) const = 0; /** * 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. */ virtual const nxgl_coord_t getPageSize(void) const = 0; /** * Set the smallest value that the slider can represent. * * @param value The smallest value. */ virtual void setMinimumValue(const int value) = 0; /** * Set the largest value that the slider can represent. * * @param value The largest value. */ virtual void setMaximumValue(const int value) = 0; /** * Set the value that of the slider. This will reposition * and redraw the grip. * * @param value The new value. */ virtual void setValue(const int value) = 0; /** * 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. */ virtual void setValueWithBitshift(const int32_t value) = 0; /** * Set the page size represented by the grip. * * @param pageSize The page size. * @see getPageSize(). */ virtual void setPageSize(const nxgl_coord_t pageSize) = 0; }; } #endif // __cplusplus #endif // __APPS_INCLUDE_GRAPHICS_NXWIDGETS_ISLIDER_HXX