![]() The non-participating contacts refer to the number of contacts thatĪre detected, but not considered in the determination of the gesture. Participating contacts refer to the number of contacts that are actively used toĬalculate the gesture. Number of participating contacts and the lower order set of 16 bits represents The higher order set of 16 bits represents the ![]() SCREEN_PROPERTY_MODIFIERS is aģ2-bit integer that conveys two 16-bit values. When this happens, the details of the contacts areĬonveyed in the SCREEN_PROPERTY_MODIFIERS property of the And sometimes, your application needs to know more specifics on theĬontacts used in the single gesture. Sometimes, a user makes a gesture using multiple contacts for a gesture that's defined Should stick with using only the SCREEN_PROPERTY_SCAN property to determine Handling specific gestures to execute differently based on an exact gesture, then you Once your application determines the gesture received, it can act accordingly. The gestures that can beĭetected are defined by Screen gesture types. Property of the SCREEN_EVENT_GESTURE event. The converted gesture can be retrieved from the SCREEN_PROPERTY_SCAN Multiple contacts can still be interpreted as one gesture. Some gestures require multiple contacts (e.g., zoom) while others don't (e.g. ![]() A gesture isn't calculated based on each separate contact. It's important to note that gestures are not necessarily produced by a single contact.Īll contacts (fingers), especially on devices that support multitouch, are considered ![]() SCREEN_PROPERTY_IDLE_TIMEOUT are used to control how the touch events The properties SCREEN_PROPERTY_GESTURE_PARAMETERS and An example of using this mode is toĪll input events are converted to SCREEN_EVENT_GESTURE events. This mode is typically set for a session that's notĪssociated with a window, but has size and position. They areĪ touch session's SCREEN_PROPERTY_MODE can be set to one of the Other session properties applicable to pointer sessions are SCREEN_PROPERTY_BRUSH_CLIP_POSITIONĪnd SCREEN_PROPERTY_BRUSH_CLIP_SIZE, but it's not usually necessary to use these propertiesīecause when you use sessions, you can define the size and position via the session's input region. Gesture is when one finger touches and holds while another finger taps within the Within the SCREEN_PROPERTY_IDLE_TIMEOUT period is considered a double tap. A touch, release, touch and release again in the same area One touch followed by a release with no further touches within the SCREEN_PROPERTY_IDLE_TIMEOUT The time used to distinguish between a tap, a double tap, and a hold and tap gestures. Threshold displacement at which point a gesture becomes multiple gestures. ![]() This property controls the amount of displacement allowed before a tap becomes a swipe, and a The minimum and maximum distance, in units produced by speed and acceleration, for swipes. For example, using two fingers gives two contacts, and this equates to two strokes. This is useful when you want the windowing system to draw a path based on the movement of one more more fingers. By move events, we mean any contact with any finger. All move events (i.e., a touch and drag) will translate to drawing on your front buffer. SCREEN_PROPERTY_BRUSH A pixmap containing the brush to be used. The following session properties are applicable to receive touch sessions: Multitouch (touch) input sessions are created with the type SCREEN_EVENT_MTOUCH_TOUCH andĪllow your application access to raw touch event. ![]()
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