harmony 鸿蒙ArkUI_NativeGestureAPI_1
ArkUI_NativeGestureAPI_1
Overview
Defines the gesture APIs.
Since: 12
Related module: ArkUI_NativeModule
Summary
Member Variables
| Name | Description |
|---|---|
| int32_t version | The struct version is 1. |
| ArkUI_GestureRecognizer *(* createTapGesture )(int32_t countNum, int32_t fingersNum) | Creates a tap gesture. |
| ArkUI_GestureRecognizer *(* createTapGestureWithDistance )(int32_t countNum, int32_t fingersNum, int32_t distance) | Creates a tap gesture that is subject to distance restrictions. |
| ArkUI_GestureRecognizer *(* createLongPressGesture )(int32_t fingersNum, bool repeatResult, int32_t durationNum) | Creates a long press gesture. |
| ArkUI_GestureRecognizer *(* createPanGesture )(int32_t fingersNum, ArkUI_GestureDirectionMask directions, double distanceNum) | Creates a pan gesture. The default value of directions is NONE. |
| ArkUI_GestureRecognizer *(* createPinchGesture )(int32_t fingersNum, double distanceNum) | Creates a pinch gesture. |
| ArkUI_GestureRecognizer *(* createRotationGesture )(int32_t fingersNum, double angleNum) | Creates a rotation gesture. |
| ArkUI_GestureRecognizer *(* createSwipeGesture )(int32_t fingersNum, ArkUI_GestureDirectionMask directions, double speedNum) | Creates a swipe gesture. |
| ArkUI_GestureRecognizer *(* createGroupGesture )(ArkUI_GroupGestureMode gestureMode) | Creates a gesture group. |
| void(* dispose )(ArkUI_GestureRecognizer *recognizer) | Disposes of a gesture to release resources. |
| int32_t(* addChildGesture )(ArkUI_GestureRecognizer *group, ArkUI_GestureRecognizer *child) | Adds a gesture to a gesture group. |
| int32_t(* removeChildGesture )(ArkUI_GestureRecognizer *group, ArkUI_GestureRecognizer *child) | Removes a gesture from a gesture group. |
| int32_t(* setGestureEventTarget )(ArkUI_GestureRecognizer *recognizer, ArkUI_GestureEventActionTypeMask actionTypeMask, void *extraParams, void(*targetReceiver)(ArkUI_GestureEvent *event, void *extraParams)) | Registers a callback for gestures. |
| int32_t(* addGestureToNode )(ArkUI_NodeHandle node, ArkUI_GestureRecognizer *recognizer, ArkUI_GesturePriority mode, ArkUI_GestureMask mask) | Adds a gesture to a UI component. |
| int32_t(* removeGestureFromNode )(ArkUI_NodeHandle node, ArkUI_GestureRecognizer *recognizer) | Removes a gesture from a node. |
| int32_t(* setGestureInterrupterToNode )(ArkUI_NodeHandle node, ArkUI_GestureInterruptResult(*interrupter)(ArkUI_GestureInterruptInfo *info)) | Sets a gesture interruption callback for a node. |
| ArkUI_GestureRecognizerType(* getGestureType )(ArkUI_GestureRecognizer *recognizer) | Obtains the type of a gesture. |
| int32_t(* setInnerGestureParallelTo )(ArkUI_NodeHandle node, void *userData, ArkUI_GestureRecognizer *(*parallelInnerGesture)(ArkUI_ParallelInnerGestureEvent *event)) | Sets the callback function for the parallel internal gesture event. |
Member Variable Description
addChildGesture
int32_t(* ArkUI_NativeGestureAPI_1::addChildGesture) (ArkUI_GestureRecognizer *group, ArkUI_GestureRecognizer *child)
Description
Adds a gesture to a gesture group.
Parameters
| Name | Description |
|---|---|
| group | Pointer to the target gesture group. |
| child | Pointer to the target gesture. |
Returns
Returns 0 if the operation is successful; returns 401 if a parameter error occurs, for example, if a gesture is added to an object that is not a gesture group.
addGestureToNode
int32_t(* ArkUI_NativeGestureAPI_1::addGestureToNode) (ArkUI_NodeHandle node, ArkUI_GestureRecognizer *recognizer, ArkUI_GesturePriority mode, ArkUI_GestureMask mask)
Description
Adds a gesture to a UI component.
Parameters
| Name | Description |
|---|---|
| node | UI component to which you want to add the gesture. |
| recognizer | Gesture to be added to the UI component. |
| mode | Gesture event mode. Available options are NORMAL_GESTURE, PARALLEL_GESTURE, and PRIORITY_GESTURE. |
| mask | Gesture masking mode. |
Returns
Returns 0 if the operation is successful; returns 401 if a parameter error occurs.
createGroupGesture
ArkUI_GestureRecognizer*(* ArkUI_NativeGestureAPI_1::createGroupGesture) (ArkUI_GroupGestureMode gestureMode)
Description
Creates a gesture group.
Parameters
| Name | Description |
|---|---|
| gestureMode | Gesture group mode. |
Returns
Returns the pointer to the created gesture group.
createLongPressGesture
ArkUI_GestureRecognizer*(* ArkUI_NativeGestureAPI_1::createLongPressGesture) (int32_t fingersNum, bool repeatResult, int32_t durationNum)
Description
Creates a long press gesture.
Parameters
| Name | Description |
|---|---|
| fingersNum | Minimum number of fingers to trigger a long press gesture. The value ranges from 1 to 10. |
| repeatResult | Whether to continuously trigger the event callback. |
| durationNum | Minimum hold-down time, in ms. If the value is less than or equal to 0, the default value 500 is used. |
Returns
Returns the pointer to the created gesture.
createPanGesture
ArkUI_GestureRecognizer*(* ArkUI_NativeGestureAPI_1::createPanGesture) (int32_t fingersNum, ArkUI_GestureDirectionMask directions, double distanceNum)
Description
Creates a pan gesture.
Parameters
| Name | Description |
|---|---|
| fingersNum | Minimum number of fingers to trigger a pan gesture. The value ranges from 1 to 10. If the value is less than 1 or is not set, the default value 1 is used. |
| directions | Pan direction. The value supports the AND (&) and OR (|) operations. |
| distanceNum | Minimum pan distance to trigger the gesture, in vp. If this parameter is set to a value less than or equal to 0, the default value 5 is used. |
Returns
Returns the pointer to the created gesture.
createPinchGesture
ArkUI_GestureRecognizer*(* ArkUI_NativeGestureAPI_1::createPinchGesture) (int32_t fingersNum, double distanceNum)
Description
Creates a pinch gesture.
Parameters
| Name | Description |
|---|---|
| fingersNum | Minimum number of fingers required to trigger the pinch gesture. The value ranges from 2 to 5. The default value is 2. |
| distanceNum | Minimum recognition distance, in vp. If this parameter is set to a value less than or equal to 0, the default value 5 is used. |
Returns
Returns the pointer to the created gesture.
createRotationGesture
ArkUI_GestureRecognizer*(* ArkUI_NativeGestureAPI_1::createRotationGesture) (int32_t fingersNum, double angleNum)
Description
Creates a rotation gesture.
Parameters
| Name | Description |
|---|---|
| fingersNum | Minimum number of fingers required to trigger the rotation gesture. The value ranges from 2 to 5. The default value is 2. |
| angleNum | Minimum angle change required to trigger the rotation gesture, in degrees (deg). The default value is 1. If this parameter is set to a value less than or equal to 0 or greater than 360, the default value 1 is used. |
Returns
Returns the pointer to the created gesture.
createSwipeGesture
ArkUI_GestureRecognizer*(* ArkUI_NativeGestureAPI_1::createSwipeGesture) (int32_t fingersNum, ArkUI_GestureDirectionMask directions, double speedNum)
Description
Creates a swipe gesture.
Parameters
| Name | Description |
|---|---|
| fingersNum | Minimum number of fingers required to trigger the swipe gesture. The value ranges from 1 to 10. |
| directions | Directions in which the swipe gesture can be recognized. |
| speedNum | Minimum speed required to recognize the swipe gesture, in px/s. If this parameter is set to a value less than or equal to 0, the default value 100 is used. |
Returns
Returns the pointer to the created gesture.
createTapGesture
ArkUI_GestureRecognizer*(* ArkUI_NativeGestureAPI_1::createTapGesture) (int32_t countNum, int32_t fingersNum)
Description
Creates a tap gesture.
Parameters
| Name | Description |
|---|---|
| countNum | Number of consecutive taps. If the value is less than 1 or is not set, the default value 1 is used. |
| fingersNum | Number of fingers required to trigger the tap gesture. The value ranges from 1 to 10. If the value is less than 1 or is not set, the default value 1 is used. |
Returns
Returns the pointer to the created gesture.
createTapGestureWithDistance
ArkUI_GestureRecognizer*(* ArkUI_NativeGestureAPI_1::createTapGestureWithDistance) (int32_t countNum, int32_t fingersNum, int32_t distance)
Description
Creates a tap gesture that is subject to distance restrictions.
Parameters
| Name | Description |
|---|---|
| countNum | Number of consecutive taps. If the value is less than 1 or is not set, the default value 1 is used. |
| fingersNum | Number of fingers required to trigger the tap gesture. The value ranges from 1 to 10. If the value is less than 1 or is not set, the default value 1 is used. |
| distance | Allowed moving distance of a finger. If the value is less than 0 or is not set, it will be converted to the default value of infinity. |
Returns
Returns the pointer to the created gesture.
dispose
void(* ArkUI_NativeGestureAPI_1::dispose) (ArkUI_GestureRecognizer *recognizer)
Description
Disposes of a gesture to release resources.
Parameters
| Name | Description |
|---|---|
| recognizer | Pointer to the gesture to dispose of. |
getGestureType
ArkUI_GestureRecognizerType(* ArkUI_NativeGestureAPI_1::getGestureType) (ArkUI_GestureRecognizer *recognizer)
Description
Obtains the type of a gesture.
Parameters
| Name | Description |
|---|---|
| recognizer | Pointer to the gesture. |
Returns
Returns the gesture type.
removeChildGesture
int32_t(* ArkUI_NativeGestureAPI_1::removeChildGesture) (ArkUI_GestureRecognizer *group, ArkUI_GestureRecognizer *child)
Description
Removes a gesture from a gesture group.
Parameters
| Name | Description |
|---|---|
| group | Pointer to the target gesture group. |
| child | Pointer to the target gesture. |
Returns
Returns 0 if the operation is successful; returns 401 if a parameter error occurs.
removeGestureFromNode
int32_t(* ArkUI_NativeGestureAPI_1::removeGestureFromNode) (ArkUI_NodeHandle node, ArkUI_GestureRecognizer *recognizer)
Description
Removes a gesture from a node.
Parameters
| Name | Description |
|---|---|
| node | Node from which you want to remove the gesture. |
| recognizer | Gesture to be removed. |
Returns
Returns 0 if the operation is successful; returns 401 if a parameter error occurs.
setGestureEventTarget
int32_t(* ArkUI_NativeGestureAPI_1::setGestureEventTarget) (ArkUI_GestureRecognizer *recognizer, ArkUI_GestureEventActionTypeMask actionTypeMask, void *extraParams, void(*targetReceiver)(ArkUI_GestureEvent *event, void *extraParams))
Description
Registers a callback for gestures.
Parameters
| Name | Description |
|---|---|
| recognizer | Pointer to a gesture recognizer. |
| actionTypeMask | Gesture event types. Multiple callbacks can be registered at once, with the callback event types distinguished in the callbacks. Example: actionTypeMask = GESTURE_EVENT_ACTION_ACCEPT |GESTURE_EVENT_ACTION_UPDATE; |
| extraParams | Context passed in the targetReceiver callback. |
| targetReceiver | Callback to register for processing the gesture event types. event indicates the gesture callback data. |
Returns
Returns 0 if the operation is successful; returns 401 if a parameter error occurs.
setGestureInterrupterToNode
int32_t(* ArkUI_NativeGestureAPI_1::setGestureInterrupterToNode) (ArkUI_NodeHandle node, ArkUI_GestureInterruptResult(*interrupter)(ArkUI_GestureInterruptInfo *info))
Description
Sets a gesture interruption callback for a node.
Parameters
| Name | Description |
|---|---|
| node | Node for which you want to set a gesture interruption callback. |
| interrupter | Gesture interruption callback to set. info indicates the gesture interruption data. If interrupter returns GESTURE_INTERRUPT_RESULT_CONTINUE, the gesture recognition process continues. If it returns GESTURE_INTERRUPT_RESULT_REJECT, the gesture recognition process is paused. |
Returns
Returns 0 if the operation is successful; returns 401 if a parameter error occurs.
setInnerGestureParallelTo
int32_t(* ArkUI_NativeGestureAPI_1::setInnerGestureParallelTo) (ArkUI_NodeHandle node, void *userData, ArkUI_GestureRecognizer *(*parallelInnerGesture)(ArkUI_ParallelInnerGestureEvent *event))
Description
Sets the callback function for the parallel internal gesture event.
Parameters
| Name | Description |
|---|---|
| node | Node for which the callback of the parallel internal gesture event is to be set. |
| userData | Custom data. |
| parallelInnerGesture | Parallel internal gesture event. event returns the data of the parallel internal gesture event. parallelInnerGesture returns the pointer to the gesture recognizer that requires parallel recognition. |
Returns
Returns 0 if the operation is successful; returns 401 if a parameter error occurs.
version
int32_t ArkUI_NativeGestureAPI_1::version
Description
The struct version is 1.
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