/**************************************************************************** * NxWidgets/libnxwidgets/include/cslidervertical.hxx * * Copyright (C) 2012 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 __INCLUDE_CSLIDERVERTICAL_HXX #define __INCLUDE_CSLIDERVERTICAL_HXX /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include "cnxwidget.hxx" #include "cwidgeteventhandler.hxx" #include "islider.hxx" /**************************************************************************** * Pre-Processor Definitions ****************************************************************************/ /**************************************************************************** * Implementation Classes ****************************************************************************/ #if defined(__cplusplus) namespace NXWidgets { class CSliderVerticalGrip; class CWidgetControl; /** * Widget providing a sliding "grip" that can be moved up and * down the "gutter". Essentially a scrollbar, but more * generic. */ class CSliderVertical : public ISlider, public CNxWidget, public CWidgetEventHandler { protected: CSliderVerticalGrip* 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_minimumGripHeight; /**< Smallest height that the grip can become. */ nxgl_coord_t m_pageSize; /**< Value of a page of data, used when clicking the gutter */ int32_t m_gutterHeight; /**< Height of the gutter, taking into account any adjustments made to the height 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. The value is * bitshifted left 16 places for accuracy. * 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 CSliderVertical(const CSliderVertical &sliderVertical) : CNxWidget(sliderVertical) { } /** * Resize and redraw the grip. */ void resizeGrip(); public: /** * Constructor. * * @param pWidgetControl The controlling widget for the display * @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. */ CSliderVertical(CWidgetControl *pWidgetControl, nxgl_coord_t x, nxgl_coord_t y, nxgl_coord_t width, nxgl_coord_t height); /** * Destructor. */ virtual inline ~CSliderVertical(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_CSLIDERVERTICAL_HXX