mirror of https://github.com/axmolengine/axmol.git
688 lines
20 KiB
C++
688 lines
20 KiB
C++
/****************************************************************************
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Copyright (c) 2013-2016 Chukong Technologies Inc.
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Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#ifndef __UISCROLLVIEW_H__
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#define __UISCROLLVIEW_H__
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#include "ui/UILayout.h"
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#include "ui/GUIExport.h"
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#include <list>
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NS_CC_BEGIN
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/**
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* @addtogroup ui
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* @{
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*/
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class EventFocusListener;
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namespace ui
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{
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class ScrollViewBar;
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/**
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* Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical
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* display. It holds a inner `Layout` container for storing child items horizontally or vertically.
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*/
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class CC_GUI_DLL ScrollView : public Layout
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{
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DECLARE_CLASS_GUI_INFO
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public:
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/**
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* ScrollView scroll direction type.
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*/
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enum class Direction
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{
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NONE,
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VERTICAL,
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HORIZONTAL,
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BOTH
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};
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/**
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* Scrollview scroll event type.
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*/
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enum class EventType
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{
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SCROLL_TO_TOP,
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SCROLL_TO_BOTTOM,
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SCROLL_TO_LEFT,
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SCROLL_TO_RIGHT,
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SCROLLING,
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BOUNCE_TOP,
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BOUNCE_BOTTOM,
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BOUNCE_LEFT,
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BOUNCE_RIGHT,
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CONTAINER_MOVED,
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SCROLLING_BEGAN,
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SCROLLING_ENDED,
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AUTOSCROLL_ENDED
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};
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/**
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* A callback which would be called when a ScrollView is scrolling.
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*/
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typedef std::function<void(Ref*, EventType)> ccScrollViewCallback;
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/**
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* Default constructor
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* @js ctor
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* @lua new
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*/
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ScrollView();
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/**
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* Default destructor
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* @js NA
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* @lua NA
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*/
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virtual ~ScrollView();
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/**
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* Create an empty ScrollView.
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* @return A ScrollView instance.
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*/
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static ScrollView* create();
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/**
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* Changes scroll direction of scrollview.
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*
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* @see `Direction`
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* @param dir Scroll direction enum.
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*/
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virtual void setDirection(Direction dir);
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/**
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* Query scroll direction of scrollview.
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*
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* @see `Direction` Direction::VERTICAL means vertical scroll, Direction::HORIZONTAL means horizontal scroll
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*
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* @return Scrollview scroll direction.
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*/
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Direction getDirection() const;
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/**
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* Get inner container of scrollview.
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*
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* Inner container is a child of scrollview.
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*
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* @return Inner container pointer.
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*/
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Layout* getInnerContainer() const;
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/**
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* Immediately stops inner container scroll (auto scrolling is not affected).
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*/
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virtual void stopScroll();
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/**
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* Immediately stops inner container scroll initiated by any of the "scrollTo*" member functions
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*/
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virtual void stopAutoScroll();
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/**
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* Immediately stops inner container scroll if any.
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*/
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virtual void stopOverallScroll();
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/**
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* Scroll inner container to bottom boundary of scrollview.
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* @param timeInSec Time in seconds.
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* @param attenuated Whether scroll speed attenuate or not.
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*/
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virtual void scrollToBottom(float timeInSec, bool attenuated);
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/**
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* Scroll inner container to top boundary of scrollview.
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* @param timeInSec Time in seconds.
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* @param attenuated Whether scroll speed attenuate or not.
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*/
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virtual void scrollToTop(float timeInSec, bool attenuated);
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/**
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* Scroll inner container to left boundary of scrollview.
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* @param timeInSec Time in seconds.
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* @param attenuated Whether scroll speed attenuate or not.
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*/
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virtual void scrollToLeft(float timeInSec, bool attenuated);
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/**
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* Scroll inner container to right boundary of scrollview.
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* @param timeInSec Time in seconds.
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* @param attenuated Whether scroll speed attenuate or not.
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*/
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virtual void scrollToRight(float timeInSec, bool attenuated);
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/**
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* Scroll inner container to top and left boundary of scrollview.
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* @param timeInSec Time in seconds.
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* @param attenuated Whether scroll speed attenuate or not.
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*/
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virtual void scrollToTopLeft(float timeInSec, bool attenuated);
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/**
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* Scroll inner container to top and right boundary of scrollview.
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* @param timeInSec Time in seconds.
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* @param attenuated Whether scroll speed attenuate or not.
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*/
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virtual void scrollToTopRight(float timeInSec, bool attenuated);
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/**
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* Scroll inner container to bottom and left boundary of scrollview.
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* @param timeInSec Time in seconds.
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* @param attenuated Whether scroll speed attenuate or not.
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*/
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virtual void scrollToBottomLeft(float timeInSec, bool attenuated);
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/**
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* Scroll inner container to bottom and right boundary of scrollview.
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* @param timeInSec Time in seconds
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* @param attenuated Whether scroll speed attenuate or not.
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*/
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virtual void scrollToBottomRight(float timeInSec, bool attenuated);
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/**
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* Scroll inner container to vertical percent position of scrollview.
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* @param percent A value between 0 and 100.
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* @param timeInSec Time in seconds.
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* @param attenuated Whether scroll speed attenuate or not.
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*/
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virtual void scrollToPercentVertical(float percent, float timeInSec, bool attenuated);
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/**
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* Scroll inner container to horizontal percent position of scrollview.
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* @param percent A value between 0 and 100.
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* @param timeInSec Time in seconds.
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* @param attenuated Whether scroll speed attenuate or not.
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*/
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virtual void scrollToPercentHorizontal(float percent, float timeInSec, bool attenuated);
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/**
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* Scroll inner container to both direction percent position of scrollview.
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* @param percent A value between 0 and 100.
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* @param timeInSec Time in seconds.
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* @param attenuated Whether scroll speed attenuate or not.
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*/
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virtual void scrollToPercentBothDirection(const Vec2& percent, float timeInSec, bool attenuated);
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/**
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* @return How far the scroll view is scrolled in the vertical axis
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*/
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float getScrolledPercentVertical() const;
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/**
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* @return How far the scroll view is scrolled in the horizontal axis
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*/
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float getScrolledPercentHorizontal() const;
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/**
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* @return How far the scroll view is scrolled in both axes, combined as a Vec2
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*/
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Vec2 getScrolledPercentBothDirection() const;
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/**
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* Move inner container to bottom boundary of scrollview.
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*/
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virtual void jumpToBottom();
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/**
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* Move inner container to top boundary of scrollview.
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*/
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virtual void jumpToTop();
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/**
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* Move inner container to left boundary of scrollview.
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*/
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virtual void jumpToLeft();
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/**
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* Move inner container to right boundary of scrollview.
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*/
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virtual void jumpToRight();
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/**
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* Move inner container to top and left boundary of scrollview.
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*/
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virtual void jumpToTopLeft();
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/**
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* Move inner container to top and right boundary of scrollview.
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*/
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virtual void jumpToTopRight();
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/**
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* Move inner container to bottom and left boundary of scrollview.
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*/
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virtual void jumpToBottomLeft();
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/**
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* Move inner container to bottom and right boundary of scrollview.
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*/
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virtual void jumpToBottomRight();
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/**
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* Move inner container to vertical percent position of scrollview.
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* @param percent A value between 0 and 100.
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*/
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virtual void jumpToPercentVertical(float percent);
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/**
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* Move inner container to horizontal percent position of scrollview.
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* @param percent A value between 0 and 100.
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*/
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virtual void jumpToPercentHorizontal(float percent);
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/**
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* Move inner container to both direction percent position of scrollview.
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* @param percent A value between 0 and 100.
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*/
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virtual void jumpToPercentBothDirection(const Vec2& percent);
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/**
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* Change inner container size of scrollview.
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*
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* Inner container size must be larger than or equal scrollview's size.
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*
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* @param size Inner container size.
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*/
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void setInnerContainerSize(const Vec2& size);
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/**
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* Get inner container size of scrollview.
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*
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* Inner container size must be larger than or equal scrollview's size.
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*
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* @return The inner container size.
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*/
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const Vec2& getInnerContainerSize() const;
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/**
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* Set inner container position
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*
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* @param pos Inner container position.
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*/
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void setInnerContainerPosition(const Vec2& pos);
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/**
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* Get inner container position
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*
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* @return The inner container position.
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*/
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const Vec2& getInnerContainerPosition() const;
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/**
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* Add callback function which will be called when scrollview event triggered.
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* @param callback A callback function with type of `ccScrollViewCallback`.
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*/
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virtual void addEventListener(const ccScrollViewCallback& callback);
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// override functions
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virtual void addChild(Node* child) override;
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virtual void addChild(Node* child, int localZOrder) override;
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virtual void addChild(Node* child, int localZOrder, int tag) override;
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virtual void addChild(Node* child, int localZOrder, std::string_view name) override;
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virtual void removeAllChildren() override;
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virtual void removeAllChildrenWithCleanup(bool cleanup) override;
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virtual void removeChild(Node* child, bool cleanup = true) override;
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virtual Vector<Node*>& getChildren() override;
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virtual const Vector<Node*>& getChildren() const override;
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virtual ssize_t getChildrenCount() const override;
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virtual Node* getChildByTag(int tag) const override;
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virtual Node* getChildByName(std::string_view name) const override;
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// touch event callback
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virtual bool onTouchBegan(Touch* touch, Event* unusedEvent) override;
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virtual void onTouchMoved(Touch* touch, Event* unusedEvent) override;
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virtual void onTouchEnded(Touch* touch, Event* unusedEvent) override;
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virtual void onTouchCancelled(Touch* touch, Event* unusedEvent) override;
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virtual void update(float dt) override;
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/**
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* @brief Toggle bounce enabled when scroll to the edge.
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*
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* @param enabled True if enable bounce, false otherwise.
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*/
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void setBounceEnabled(bool enabled);
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/**
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* @brief Query bounce state.
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*
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* @return True if bounce is enabled, false otherwise.
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*/
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bool isBounceEnabled() const;
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/**
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* @brief Toggle whether enable scroll inertia while scrolling.
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*
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* @param enabled True if enable inertia, false otherwise.
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*/
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void setInertiaScrollEnabled(bool enabled);
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/**
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* @brief Query inertia scroll state.
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*
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* @return True if inertia is enabled, false otherwise.
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*/
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bool isInertiaScrollEnabled() const;
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/**
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* @brief Toggle scroll bar enabled.
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*
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* @param enabled True if enable scroll bar, false otherwise.
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*/
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void setScrollBarEnabled(bool enabled);
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/**
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* @brief Query scroll bar state.
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*
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* @return True if scroll bar is enabled, false otherwise.
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*/
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bool isScrollBarEnabled() const;
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/**
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* @brief Set the scroll bar positions from the left-bottom corner (horizontal) and right-top corner (vertical).
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*
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* @param positionFromCorner The position from the left-bottom corner (horizontal) and right-top corner (vertical).
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*/
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void setScrollBarPositionFromCorner(const Vec2& positionFromCorner);
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/**
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* @brief Set the vertical scroll bar position from right-top corner.
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*
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* @param positionFromCorner The position from right-top corner
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*/
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void setScrollBarPositionFromCornerForVertical(const Vec2& positionFromCorner);
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/**
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* @brief Get the vertical scroll bar's position from right-top corner.
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*
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* @return positionFromCorner
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*/
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Vec2 getScrollBarPositionFromCornerForVertical() const;
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/**
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* @brief Set the horizontal scroll bar position from left-bottom corner.
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*
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* @param positionFromCorner The position from left-bottom corner
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*/
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void setScrollBarPositionFromCornerForHorizontal(const Vec2& positionFromCorner);
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/**
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* @brief Get the horizontal scroll bar's position from right-top corner.
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*
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* @return positionFromCorner
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*/
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Vec2 getScrollBarPositionFromCornerForHorizontal() const;
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/**
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* @brief Set the scroll bar's width
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*
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* @param width The scroll bar's width
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*/
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void setScrollBarWidth(float width);
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/**
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* @brief Get the scroll bar's width
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*
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* @return the scroll bar's width
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*/
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float getScrollBarWidth() const;
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/**
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* @brief Set the scroll bar's color
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*
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* @param the scroll bar's color
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*/
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void setScrollBarColor(const Color3B& color);
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/**
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* @brief Get the scroll bar's color
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*
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* @return the scroll bar's color
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*/
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const Color3B& getScrollBarColor() const;
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/**
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* @brief Set the scroll bar's opacity
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*
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* @param the scroll bar's opacity
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*/
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void setScrollBarOpacity(uint8_t opacity);
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/**
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* @brief Get the scroll bar's opacity
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*
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* @return the scroll bar's opacity
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*/
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uint8_t getScrollBarOpacity() const;
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/**
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* @brief Set scroll bar auto hide state
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*
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* @param scroll bar auto hide state
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*/
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void setScrollBarAutoHideEnabled(bool autoHideEnabled);
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/**
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* @brief Query scroll bar auto hide state
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*
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* @return True if scroll bar auto hide is enabled, false otherwise.
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*/
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bool isScrollBarAutoHideEnabled() const;
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/**
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* @brief Set scroll bar auto hide time
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*
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* @param scroll bar auto hide time
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*/
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void setScrollBarAutoHideTime(float autoHideTime);
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/**
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* @brief Get the scroll bar's auto hide time
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*
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* @return the scroll bar's auto hide time
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*/
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float getScrollBarAutoHideTime() const;
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/**
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* @brief Set the touch total time threshold
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*
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* @param the touch total time threshold
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*/
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void setTouchTotalTimeThreshold(float touchTotalTimeThreshold);
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/**
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* @brief Get the touch total time threshold
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*
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* @return the touch total time threshold
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*/
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float getTouchTotalTimeThreshold() const;
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/**
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* Set layout type for scrollview.
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*
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* @see `Layout::Type`
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* @param type Layout type enum.
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*/
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virtual void setLayoutType(Type type) override;
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/**
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* Get the layout type for scrollview.
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*
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* @see `Layout::Type`
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* @return LayoutType
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*/
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virtual Type getLayoutType() const override;
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/**
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* Return the "class name" of widget.
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*/
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virtual std::string getDescription() const override;
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/**
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* @lua NA
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*/
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virtual void onEnter() override;
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/**
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* @lua NA
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*/
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virtual void onExit() override;
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/**
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* When a widget is in a layout, you could call this method to get the next focused widget within a specified
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*direction. If the widget is not in a layout, it will return itself
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*@param direction the direction to look for the next focused widget in a layout
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*@param current the current focused widget
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*@return the next focused widget in a layout
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*/
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virtual Widget* findNextFocusedWidget(FocusDirection direction, Widget* current) override;
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/**
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* @return Whether the user is currently dragging the ScrollView to scroll it
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*/
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bool isScrolling() const { return _scrolling; }
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/**
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* @return Whether the ScrollView is currently scrolling because of a bounceback or inertia slowdown.
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*/
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bool isAutoScrolling() const { return _autoScrolling; }
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CC_CONSTRUCTOR_ACCESS : virtual bool init() override;
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protected:
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enum class MoveDirection
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{
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TOP,
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BOTTOM,
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LEFT,
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RIGHT,
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};
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virtual void initRenderer() override;
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virtual void onSizeChanged() override;
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virtual void doLayout() override;
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virtual Widget* createCloneInstance() override;
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virtual void copySpecialProperties(Widget* model) override;
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virtual void copyClonedWidgetChildren(Widget* model) override;
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virtual void initScrollBar();
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virtual void removeScrollBar();
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Vec2 flattenVectorByDirection(const Vec2& vector);
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virtual Vec2 getHowMuchOutOfBoundary(const Vec2& addition = Vec2::ZERO);
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bool isOutOfBoundary(MoveDirection dir);
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bool isOutOfBoundary();
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virtual void moveInnerContainer(const Vec2& deltaMove, bool canStartBounceBack);
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bool calculateCurrAndPrevTouchPoints(Touch* touch, Vec3* currPt, Vec3* prevPt);
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void gatherTouchMove(const Vec2& delta);
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Vec2 calculateTouchMoveVelocity() const;
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virtual void startAttenuatingAutoScroll(const Vec2& deltaMove, const Vec2& initialVelocity);
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void startAutoScroll(const Vec2& deltaMove, float timeInSec, bool attenuated);
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void startAutoScrollToDestination(const Vec2& des, float timeInSec, bool attenuated);
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bool isNecessaryAutoScrollBrake();
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void processAutoScrolling(float deltaTime);
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void startInertiaScroll(const Vec2& touchMoveVelocity);
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bool startBounceBackIfNeeded();
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void jumpToDestination(const Vec2& des);
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virtual void scrollChildren(const Vec2& deltaMove);
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virtual void handlePressLogic(Touch* touch);
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virtual void handleMoveLogic(Touch* touch);
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virtual void handleReleaseLogic(Touch* touch);
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virtual void interceptTouchEvent(Widget::TouchEventType event, Widget* sender, Touch* touch) override;
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void processScrollEvent(MoveDirection dir, bool bounce);
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void processScrollingEvent();
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void processScrollingEndedEvent();
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void dispatchEvent(EventType eventType);
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void updateScrollBar(const Vec2& outOfBoundary);
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protected:
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virtual float getAutoScrollStopEpsilon() const;
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bool fltEqualZero(const Vec2& point) const;
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Layout* _innerContainer;
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Direction _direction;
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float _topBoundary;
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float _bottomBoundary;
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float _leftBoundary;
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float _rightBoundary;
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bool _bePressed;
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float _childFocusCancelOffsetInInch;
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// Touch move speed
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std::list<Vec2> _touchMoveDisplacements;
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std::list<float> _touchMoveTimeDeltas;
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long long _touchMovePreviousTimestamp;
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float _touchTotalTimeThreshold;
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bool _scrolling;
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bool _autoScrolling;
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bool _autoScrollAttenuate;
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Vec2 _autoScrollStartPosition;
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Vec2 _autoScrollTargetDelta;
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float _autoScrollTotalTime;
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float _autoScrollAccumulatedTime;
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bool _autoScrollCurrentlyOutOfBoundary;
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bool _autoScrollBraking;
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Vec2 _autoScrollBrakingStartPosition;
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bool _inertiaScrollEnabled;
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bool _bounceEnabled;
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Vec2 _outOfBoundaryAmount;
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bool _outOfBoundaryAmountDirty;
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bool _scrollBarEnabled;
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ScrollViewBar* _verticalScrollBar;
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ScrollViewBar* _horizontalScrollBar;
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Ref* _scrollViewEventListener;
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ccScrollViewCallback _eventCallback;
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};
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} // namespace ui
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// end of ui group
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/// @}
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NS_CC_END
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#endif /* defined(__CocoGUI__ScrollView__) */
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