cocos2dx学习之UIScrollView.h
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#ifndef __UISCROLLVIEW_H__
#define __UISCROLLVIEW_H__
#include "ui/UILayout.h"
#include "ui/GUIExport.h"
#include
NS_CC_BEGIN
/**
* @addtogroup ui
* @{
*/
class EventFocusListener;
namespace ui {
class ScrollViewBar;
/**
*Scrollview scroll event type.
*@deprecated use @see `ScrollView::EventType` instead.
*/
typedef enum
{
SCROLLVIEW_EVENT_SCROLL_TO_TOP,
SCROLLVIEW_EVENT_SCROLL_TO_BOTTOM,
SCROLLVIEW_EVENT_SCROLL_TO_LEFT,
SCROLLVIEW_EVENT_SCROLL_TO_RIGHT,
SCROLLVIEW_EVENT_SCROLLING,
SCROLLVIEW_EVENT_BOUNCE_TOP,
SCROLLVIEW_EVENT_BOUNCE_BOTTOM,
SCROLLVIEW_EVENT_BOUNCE_LEFT,
SCROLLVIEW_EVENT_BOUNCE_RIGHT,
SCROLLVIEW_EVENT_SCROLLING_BEGAN,
SCROLLVIEW_EVENT_SCROLLING_ENDED,
SCROLLVIEW_EVENT_AUTOSCROLL_ENDED
}ScrollviewEventType;
/**
* A callback which would be called when a ScrollView is scrolling.
*@deprecated Use @see `ccScrollViewCallback` instead.
*/
typedef void (Ref::*SEL_ScrollViewEvent)(Ref*, ScrollviewEventType);
#define scrollvieweventselector(_SELECTOR) (SEL_ScrollViewEvent)(&_SELECTOR)
/**
* Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display.
* It holds a inner `Layout` container for storing child items horizontally or vertically.
*/
class CC_GUI_DLL ScrollView : public Layout
{
DECLARE_CLASS_GUI_INFO
public:
/**
* ScrollView scroll direction type.
*/
enum class Direction
{
NONE,
VERTICAL,
HORIZONTAL,
BOTH
};
/**
* Scrollview scroll event type.
*/
enum class EventType
{
SCROLL_TO_TOP,
SCROLL_TO_BOTTOM,
SCROLL_TO_LEFT,
SCROLL_TO_RIGHT,
SCROLLING,
BOUNCE_TOP,
BOUNCE_BOTTOM,
BOUNCE_LEFT,
BOUNCE_RIGHT,
CONTAINER_MOVED,
SCROLLING_BEGAN,
SCROLLING_ENDED,
AUTOSCROLL_ENDED
};
/**
* A callback which would be called when a ScrollView is scrolling.
*/
typedef std::function
/**
* Default constructor
* @js ctor
* @lua new
*/
ScrollView();
/**
* Default destructor
* @js NA
* @lua NA
*/
virtual ~ScrollView();
/**
* Create an empty ScrollView.
* @return A ScrollView instance.
*/
static ScrollView* create();
/**
* Changes scroll direction of scrollview.
*
* @see `Direction`
* @param dir Scroll direction enum.
*/
virtual void setDirection(Direction dir);
/**
* Query scroll direction of scrollview.
*
* @see `Direction` Direction::VERTICAL means vertical scroll, Direction::HORIZONTAL means horizontal scroll
*
* @return Scrollview scroll direction.
*/
Direction getDirection()const;
/**
* Get inner container of scrollview.
*
* Inner container is a child of scrollview.
*
* @return Inner container pointer.
*/
Layout* getInnerContainer()const;
/**
* Immediately stops inner container scroll initiated by any of the "scrollTo*" member functions
*/
virtual void stopAutoScroll();
/**
* Scroll inner container to bottom boundary of scrollview.
* @param timeInSec Time in seconds.
* @param attenuated Whether scroll speed attenuate or not.
*/
virtual void scrollToBottom(float timeInSec, bool attenuated);
/**
* Scroll inner container to top boundary of scrollview.
* @param timeInSec Time in seconds.
* @param attenuated Whether scroll speed attenuate or not.
*/
virtual void scrollToTop(float timeInSec, bool attenuated);
/**
* Scroll inner container to left boundary of scrollview.
* @param timeInSec Time in seconds.
* @param attenuated Whether scroll speed attenuate or not.
*/
virtual void scrollToLeft(float timeInSec, bool attenuated);
/**
* Scroll inner container to right boundary of scrollview.
* @param timeInSec Time in seconds.
* @param attenuated Whether scroll speed attenuate or not.
*/
virtual void scrollToRight(float timeInSec, bool attenuated);
/**
* Scroll inner container to top and left boundary of scrollview.
* @param timeInSec Time in seconds.
* @param attenuated Whether scroll speed attenuate or not.
*/
virtual void scrollToTopLeft(float timeInSec, bool attenuated);
/**
* Scroll inner container to top and right boundary of scrollview.
* @param timeInSec Time in seconds.
* @param attenuated Whether scroll speed attenuate or not.
*/
virtual void scrollToTopRight(float timeInSec, bool attenuated);
/**
* Scroll inner container to bottom and left boundary of scrollview.
* @param timeInSec Time in seconds.
* @param attenuated Whether scroll speed attenuate or not.
*/
virtual void scrollToBottomLeft(float timeInSec, bool attenuated);
/**
* Scroll inner container to bottom and right boundary of scrollview.
* @param timeInSec Time in seconds
* @param attenuated Whether scroll speed attenuate or not.
*/
virtual void scrollToBottomRight(float timeInSec, bool attenuated);
/**
* Scroll inner container to vertical percent position of scrollview.
* @param percent A value between 0 and 100.
* @param timeInSec Time in seconds.
* @param attenuated Whether scroll speed attenuate or not.
*/
virtual void scrollToPercentVertical(float percent, float timeInSec, bool attenuated);
/**
* Scroll inner container to horizontal percent position of scrollview.
* @param percent A value between 0 and 100.
* @param timeInSec Time in seconds.
* @param attenuated Whether scroll speed attenuate or not.
*/
virtual void scrollToPercentHorizontal(float percent, float timeInSec, bool attenuated);
/**
* Scroll inner container to both direction percent position of scrollview.
* @param percent A value between 0 and 100.
* @param timeInSec Time in seconds.
* @param attenuated Whether scroll speed attenuate or not.
*/
virtual void scrollToPercentBothDirection(const Vec2& percent, float timeInSec, bool attenuated);
/**
* @return How far the scroll view is scrolled in the vertical axis
*/
float getScrolledPercentVertical() const;
/**
* @return How far the scroll view is scrolled in the horizontal axis
*/
float getScrolledPercentHorizontal() const;
/**
* @return How far the scroll view is scrolled in both axes, combined as a Vec2
*/
Vec2 getScrolledPercentBothDirection() const;
/**
* Move inner container to bottom boundary of scrollview.
*/
virtual void jumpToBottom();
/**
* Move inner container to top boundary of scrollview.
*/
virtual void jumpToTop();
/**
* Move inner container to left boundary of scrollview.
*/
virtual void jumpToLeft();
/**
* Move inner container to right boundary of scrollview.
*/
virtual void jumpToRight();
/**
* Move inner container to top and left boundary of scrollview.
*/
virtual void jumpToTopLeft();
/**
* Move inner container to top and right boundary of scrollview.
*/
virtual void jumpToTopRight();
/**
* Move inner container to bottom and left boundary of scrollview.
*/
virtual void jumpToBottomLeft();
/**
* Move inner container to bottom and right boundary of scrollview.
*/
virtual void jumpToBottomRight();
/**
* Move inner container to vertical percent position of scrollview.
* @param percent A value between 0 and 100.
*/
virtual void jumpToPercentVertical(float percent);
/**
* Move inner container to horizontal percent position of scrollview.
* @param percent A value between 0 and 100.
*/
virtual void jumpToPercentHorizontal(float percent);
/**
* Move inner container to both direction percent position of scrollview.
* @param percent A value between 0 and 100.
*/
virtual void jumpToPercentBothDirection(const Vec2& percent);
/**
* Change inner container size of scrollview.
*
* Inner container size must be larger than or equal scrollview's size.
*
* @param size Inner container size.
*/
void setInnerContainerSize(const Size &size);
/**
* Get inner container size of scrollview.
*
* Inner container size must be larger than or equal scrollview's size.
*
* @return The inner container size.
*/
const Size& getInnerContainerSize() const;
/**
* Set inner container position
*
* @param pos Inner container position.
*/
void setInnerContainerPosition(const Vec2 &pos);
/**
* Get inner container position
*
* @return The inner container position.
*/
const Vec2& getInnerContainerPosition() const;
/**
* Add callback function which will be called when scrollview event triggered.
* @deprecated Use @see `addEventListener` instead.
* @param target A pointer of `Ref*` type.
* @param selector A member function pointer with type of `SEL_ScrollViewEvent`.
*/
CC_DEPRECATED_ATTRIBUTE void addEventListenerScrollView(Ref* target, SEL_ScrollViewEvent selector);
/**
* Add callback function which will be called when scrollview event triggered.
* @param callback A callback function with type of `ccScrollViewCallback`.
*/
virtual void addEventListener(const ccScrollViewCallback& callback);
//override functions
virtual void addChild(Node* child)override;
virtual void addChild(Node * child, int localZOrder)override;
virtual void addChild(Node* child, int localZOrder, int tag) override;
virtual void addChild(Node* child, int localZOrder, const std::string &name) override;
virtual void removeAllChildren() override;
virtual void removeAllChildrenWithCleanup(bool cleanup) override;
virtual void removeChild(Node* child, bool cleanup = true) override;
virtual Vector
virtual const Vector
virtual ssize_t getChildrenCount() const override;
virtual Node * getChildByTag(int tag) const override;
virtual Node* getChildByName(const std::string& name)const override;
//touch event callback
virtual bool onTouchBegan(Touch *touch, Event *unusedEvent) override;
virtual void onTouchMoved(Touch *touch, Event *unusedEvent) override;
virtual void onTouchEnded(Touch *touch, Event *unusedEvent) override;
virtual void onTouchCancelled(Touch *touch, Event *unusedEvent) override;
virtual void update(float dt) override;
/**
* @brief Toggle bounce enabled when scroll to the edge.
*
* @param enabled True if enable bounce, false otherwise.
*/
void setBounceEnabled(bool enabled);
/**
* @brief Query bounce state.
*
* @return True if bounce is enabled, false otherwise.
*/
bool isBounceEnabled() const;
/**
* @brief Toggle whether enable scroll inertia while scrolling.
*
* @param enabled True if enable inertia, false otherwise.
*/
void setInertiaScrollEnabled(bool enabled);
/**
* @brief Query inertia scroll state.
*
* @return True if inertia is enabled, false otherwise.
*/
bool isInertiaScrollEnabled() const;
/**
* @brief Toggle scroll bar enabled.
*
* @param enabled True if enable scroll bar, false otherwise.
*/
void setScrollBarEnabled(bool enabled);
/**
* @brief Query scroll bar state.
*
* @return True if scroll bar is enabled, false otherwise.
*/
bool isScrollBarEnabled() const;
/**
* @brief Set the scroll bar positions from the left-bottom corner (horizontal) and right-top corner (vertical).
*
* @param positionFromCorner The position from the left-bottom corner (horizontal) and right-top corner (vertical).
*/
void setScrollBarPositionFromCorner(const Vec2& positionFromCorner);
/**
* @brief Set the vertical scroll bar position from right-top corner.
*
* @param positionFromCorner The position from right-top corner
*/
void setScrollBarPositionFromCornerForVertical(const Vec2& positionFromCorner);
/**
* @brief Get the vertical scroll bar's position from right-top corner.
*
* @return positionFromCorner
*/
Vec2 getScrollBarPositionFromCornerForVertical() const;
/**
* @brief Set the horizontal scroll bar position from left-bottom corner.
*
* @param positionFromCorner The position from left-bottom corner
*/
void setScrollBarPositionFromCornerForHorizontal(const Vec2& positionFromCorner);
/**
* @brief Get the horizontal scroll bar's position from right-top corner.
*
* @return positionFromCorner
*/
Vec2 getScrollBarPositionFromCornerForHorizontal() const;
/**
* @brief Set the scroll bar's width
*
* @param width The scroll bar's width
*/
void setScrollBarWidth(float width);
/**
* @brief Get the scroll bar's width
*
* @return the scroll bar's width
*/
float getScrollBarWidth() const;
/**
* @brief Set the scroll bar's color
*
* @param the scroll bar's color
*/
void setScrollBarColor(const Color3B& color);
/**
* @brief Get the scroll bar's color
*
* @return the scroll bar's color
*/
const Color3B& getScrollBarColor() const;
/**
* @brief Set the scroll bar's opacity
*
* @param the scroll bar's opacity
*/
void setScrollBarOpacity(GLubyte opacity);
/**
* @brief Get the scroll bar's opacity
*
* @return the scroll bar's opacity
*/
GLubyte getScrollBarOpacity() const;
/**
* @brief Set scroll bar auto hide state
*
* @param scroll bar auto hide state
*/
void setScrollBarAutoHideEnabled(bool autoHideEnabled);
/**
* @brief Query scroll bar auto hide state
*
* @return True if scroll bar auto hide is enabled, false otherwise.
*/
bool isScrollBarAutoHideEnabled() const;
/**
* @brief Set scroll bar auto hide time
*
* @param scroll bar auto hide time
*/
void setScrollBarAutoHideTime(float autoHideTime);
/**
* @brief Get the scroll bar's auto hide time
*
* @return the scroll bar's auto hide time
*/
float getScrollBarAutoHideTime() const;
/**
* @brief Set the touch total time threshold
*
* @param the touch total time threshold
*/
void setTouchTotalTimeThreshold(float touchTotalTimeThreshold);
/**
* @brief Get the touch total time threshold
*
* @return the touch total time threshold
*/
float getTouchTotalTimeThreshold() const;
/**
* Set layout type for scrollview.
*
* @see `Layout::Type`
* @param type Layout type enum.
*/
virtual void setLayoutType(Type type) override;
/**
* Get the layout type for scrollview.
*
* @see `Layout::Type`
* @return LayoutType
*/
virtual Type getLayoutType() const override;
/**
* Return the "class name" of widget.
*/
virtual std::string getDescription() const override;
/**
* @lua NA
*/
virtual void onEnter() override;
/**
* When a widget is in a layout, you could call this method to get the next focused widget within a specified direction.
* If the widget is not in a layout, it will return itself
*@param direction the direction to look for the next focused widget in a layout
*@param current the current focused widget
*@return the next focused widget in a layout
*/
virtual Widget* findNextFocusedWidget(FocusDirection direction, Widget* current) override;
/**
* @return Whether the user is currently dragging the ScrollView to scroll it
*/
bool isScrolling() const { return _scrolling; }
/**
* @return Whether the ScrollView is currently scrolling because of a bounceback or inertia slowdown.
*/
bool isAutoScrolling() const { return _autoScrolling; }
CC_CONSTRUCTOR_ACCESS:
virtual bool init() override;
protected:
enum class MoveDirection
{
TOP,
BOTTOM,
LEFT,
RIGHT,
};
virtual void initRenderer() override;
virtual void onSizeChanged() override;
virtual void doLayout() override;
virtual Widget* createCloneInstance() override;
virtual void copySpecialProperties(Widget* model) override;
virtual void copyClonedWidgetChildren(Widget* model) override;
virtual void initScrollBar();
virtual void removeScrollBar();
Vec2 flattenVectorByDirection(const Vec2& vector);
virtual Vec2 getHowMuchOutOfBoundary(const Vec2& addition = Vec2::ZERO);
bool isOutOfBoundary(MoveDirection dir);
bool isOutOfBoundary();
virtual void moveInnerContainer(const Vec2& deltaMove, bool canStartBounceBack);
bool calculateCurrAndPrevTouchPoints(Touch* touch, Vec3* currPt, Vec3* prevPt);
void gatherTouchMove(const Vec2& delta);
Vec2 calculateTouchMoveVelocity() const;
virtual void startAttenuatingAutoScroll(const Vec2& deltaMove, const Vec2& initialVelocity);
void startAutoScroll(const Vec2& deltaMove, float timeInSec, bool attenuated);
void startAutoScrollToDestination(const Vec2& des, float timeInSec, bool attenuated);
bool isNecessaryAutoScrollBrake();
void processAutoScrolling(float deltaTime);
void startInertiaScroll(const Vec2& touchMoveVelocity);
bool startBounceBackIfNeeded();
void jumpToDestination(const Vec2& des);
virtual void scrollChildren(const Vec2& deltaMove);
virtual void handlePressLogic(Touch *touch);
virtual void handleMoveLogic(Touch *touch);
virtual void handleReleaseLogic(Touch *touch);
virtual void interceptTouchEvent(Widget::TouchEventType event,Widget* sender,Touch *touch) override;
void processScrollEvent(MoveDirection dir, bool bounce);
void processScrollingEvent();
void processScrollingEndedEvent();
void dispatchEvent(ScrollviewEventType scrollEventType, EventType eventType);
void updateScrollBar(const Vec2& outOfBoundary);
protected:
virtual float getAutoScrollStopEpsilon() const;
bool fltEqualZero(const Vec2& point) const;
Layout* _innerContainer;
Direction _direction;
float _topBoundary;
float _bottomBoundary;
float _leftBoundary;
float _rightBoundary;
bool _bePressed;
float _childFocusCancelOffsetInInch;
// Touch move speed
std::list
std::list
long long _touchMovePreviousTimestamp;
float _touchTotalTimeThreshold;
bool _scrolling;
bool _autoScrolling;
bool _autoScrollAttenuate;
Vec2 _autoScrollStartPosition;
Vec2 _autoScrollTargetDelta;
float _autoScrollTotalTime;
float _autoScrollAccumulatedTime;
bool _autoScrollCurrentlyOutOfBoundary;
bool _autoScrollBraking;
Vec2 _autoScrollBrakingStartPosition;
bool _inertiaScrollEnabled;
bool _bounceEnabled;
Vec2 _outOfBoundaryAmount;
bool _outOfBoundaryAmountDirty;
bool _scrollBarEnabled;
ScrollViewBar* _verticalScrollBar;
ScrollViewBar* _horizontalScrollBar;
Ref* _scrollViewEventListener;
#if defined(__GNUC__) && ((__GNUC__ >= 4) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 1)))
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#elif _MSC_VER >= 1400 //vs 2005 or higher
#pragma warning (push)
#pragma warning (disable: 4996)
#endif
SEL_ScrollViewEvent _scrollViewEventSelector;
#if defined(__GNUC__) && ((__GNUC__ >= 4) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 1)))
#pragma GCC diagnostic warning "-Wdeprecated-declarations"
#elif _MSC_VER >= 1400 //vs 2005 or higher
#pragma warning (pop)
#endif
ccScrollViewCallback _eventCallback;
};
}
// end of ui group
/// @}
NS_CC_END
#endif /* defined(__CocoGUI__ScrollView__) */