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222 lines
8.2 KiB
222 lines
8.2 KiB
/**************************************************************************** |
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* NxWidgets/libnxwidgets/include/crectcache.hxx |
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* |
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* Copyright (C) 2012 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX, NxWidgets, nor the names of its contributors |
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* me be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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**************************************************************************** |
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* |
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* Portions of this package derive from Woopsi (http://woopsi.org/) and |
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* portions are original efforts. It is difficult to determine at this |
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* point what parts are original efforts and which parts derive from Woopsi. |
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* However, in any event, the work of Antony Dzeryn will be acknowledged |
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* in most NxWidget files. Thanks Antony! |
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* |
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* Copyright (c) 2007-2011, Antony Dzeryn |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* * Neither the names "Woopsi", "Simian Zombie" nor the |
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* names of its contributors may be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY Antony Dzeryn ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Antony Dzeryn BE LIABLE FOR ANY |
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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#ifndef __INCLUDE_CRECTCACHE_HXX |
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#define __INCLUDE_CRECTCACHE_HXX |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#include <stdint.h> |
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#include <stdbool.h> |
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#include <nuttx/nx/nxglib.h> |
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#include "cnxwidget.hxx" |
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#include "cwidgetstyle.hxx" |
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#include "tnxarray.hxx" |
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/**************************************************************************** |
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* Pre-Processor Definitions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Implementation Classes |
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****************************************************************************/ |
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#if defined(__cplusplus) |
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namespace NXWidgets |
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{ |
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/** |
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* Maintains a list of foreground (ie. above children) and background (with |
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* child overlapped-rects removed) rectangles representing the visible portions |
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* of a widget. |
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*/ |
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class CRectCache |
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{ |
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private: |
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TNxArray<CRect> m_foregroundRegions; /**< List of the widget's visible regions */ |
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TNxArray<CRect> m_backgroundRegions; /**< List of the widget's visible regions with child rects removed */ |
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const CNxWidget *m_widget; /**< Owning widget */ |
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bool m_foregroundInvalid; /**< True if the foreground cache needs refreshing */ |
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bool m_backgroundInvalid; /**< True if the background cache needs refreshing */ |
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/** |
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* Cache the foreground regions. |
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*/ |
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void cacheForegroundRegions(void); |
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/** |
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* Cache the background regions. |
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*/ |
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void cacheBackgroundRegions(void); |
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public: |
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/** |
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* Constructor. |
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* |
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* @param widget Widget that contains the rect cache. |
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*/ |
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CRectCache(const CNxWidget *widget); |
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/** |
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* Destructor. |
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*/ |
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inline ~CRectCache() { } |
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/** |
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* Rebuild the cache if it is invalid. |
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*/ |
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void cache(void); |
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/** |
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* Invalidates the cache. |
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*/ |
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inline void invalidate(void) |
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{ |
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m_foregroundInvalid = true; |
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m_backgroundInvalid = true; |
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}; |
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/** |
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* Return the list of background regions. These are regions that are not overlapped by |
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* child widgets. |
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* |
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* @return The list of background regions. |
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*/ |
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inline TNxArray<CRect> *getBackgroundRegions(void) |
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{ |
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return &m_backgroundRegions; |
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} |
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/** |
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* Return the list of foreground regions. These are regions that represent the entire |
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* visible surface of the widget - that is, any regions not overlapped by ancestors or |
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* sublings of the widget - including any regions that are actually overlapped by |
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* child widgets. |
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* |
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* @return The list of foreground regions. |
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*/ |
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inline TNxArray<CRect> *getForegroundRegions(void) |
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{ |
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return &m_foregroundRegions; |
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} |
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/** |
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* Works out which rectangles in the invalidRects list overlap this |
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* widget, then cuts the rectangles into smaller pieces. The overlapping |
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* pieces are pushed into validRects, and the non-overlapping pieces are |
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* pushed back into the invalidRects vector. |
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* |
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* @param invalidRects A vector of regions that need to be tested |
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* for collisions against this widget; they represent regions that need |
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* to be redrawn. |
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* @param validRects A vector of regions that represents areas of the |
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* display that do not need to be redrawn. |
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* @param sender Pointer to the widget that initiated the split. |
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*/ |
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void splitRectangles(TNxArray<CRect> *invalidRects, |
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TNxArray<CRect> *validRects, |
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FAR const CNxWidget *sender) const; |
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/** |
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* Move any rectangles from the visibleRects list that overlap this widget |
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* into the invisibleRects list. Used during visible region calculations. |
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* |
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* @param visibleRects A vector of regions that are not overlapped. |
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* @param invisibleRects A vector of regions that are overlapped. |
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* @param widget The widget that requested the lists. |
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* @see splitRectangles() |
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*/ |
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void removeOverlappedRects(TNxArray<CRect> *visibleRects, |
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TNxArray<CRect> *invisibleRects, |
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FAR const CNxWidget* widget) const; |
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}; |
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} |
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#endif // __cplusplus |
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#endif // __INCLUDE_CRECTCACHE_HXX |
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