/**************************************************************************** * apps/include/graphics/nxwidgets/csliderhorizontal.hxx * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * * 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_CSLIDERHORIZONTAL_HXX #define __APPS_INCLUDE_GRAPHICS_NXWIDGETS_CSLIDERHORIZONTAL_HXX /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include "graphics/nxwidgets/cnxwidget.hxx" #include "graphics/nxwidgets/cwidgeteventhandler.hxx" #include "graphics/nxwidgets/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. */ int m_minimumValue; /**< Minimum value that the grip can represent. */ int 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 shifted 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 int getMinimumValue(void) const { return m_minimumValue; } /** * Get the largest value that the slider can represent. * * @return The largest value. */ inline const int getMaximumValue(void) const { return m_maximumValue; } /** * Get the current value of the slider. * * return The current slider value. */ inline const int 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 int 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 int 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 int value); /** * Set the value that of the slider. This will reposition and redraw * the grip. The supplied value should be shifted 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 // __APPS_INCLUDE_GRAPHICS_NXWIDGETS_CSLIDERHORIZONTAL_HXX