score::InfiniteScroller Struct Reference

Static Public Member Functions
static void	start (QGraphicsItem &self, double orig)
static void	move_free (QGraphicsSceneMouseEvent *event)
static double	move (QGraphicsSceneMouseEvent *event)
static void	stop (QGraphicsItem &self, QGraphicsSceneMouseEvent *event)
static void	abort (QGraphicsItem &self)
static QPointF	relativeMotion (QGraphicsSceneMouseEvent *event)
static bool	holdsPointer ()
static void	cancel ()
	Ends any relative-motion session in progress, without touching the cursor.

Static Public Attributes
static QRectF	currentGeometry {}
static double	origValue {}
static double	currentSpeed {}
static double	currentDelta {}

Member Function Documentation

abort()

void score::InfiniteScroller::abort ( QGraphicsItem &  self )

static

stop() for a drag that ends without a release event to end it on: undoes what start() did to the cursor, but cannot put it back where the press was, there being no press position to read. A no-op for an item that is not the one currently dragging, so a control cleaning up after itself cannot tear down someone else's session.

holdsPointer()

bool score::InfiniteScroller::holdsPointer ( )

static

Whether the platform is holding the pointer on the press point, so that a caller keeping its own cursor knows whether hiding it is safe.

relativeMotion()

QPointF score::InfiniteScroller::relativeMotion ( QGraphicsSceneMouseEvent *  event )

static

Motion for a drag that is not a vertical value scroll: the platform's relative delta while it holds the pointer, the change in pointer position otherwise. Both axes, since the caller decides what they mean.

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The documentation for this struct was generated from the following files:

• InfiniteScroller.hpp
• InfiniteScroller.cpp