Wayland++ 1.0.0
C++ Bindings for Wayland
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a pinch gesture object More...
#include <wayland-server-protocol-unstable.hpp>
Inherits wayland::server::resource_t.
Public Member Functions | |
std::function< void()> & | on_destroy () |
destroy the pinch gesture object | |
void | begin (uint32_t serial, uint32_t time, surface_t const &surface, uint32_t fingers, bool post=true) |
multi-finger pinch begin | |
void | update (uint32_t time, double dx, double dy, double scale, double rotation, bool post=true) |
multi-finger pinch motion | |
void | end (uint32_t serial, uint32_t time, int32_t cancelled, bool post=true) |
multi-finger pinch end | |
bool | proxy_has_object () const |
Check whether this wrapper actually wraps an object. | |
void | post_no_memory () const |
uint32_t | get_id () const |
client_t | get_client () const |
unsigned int | get_version () const |
std::string | get_class () |
Static Public Attributes | |
static constexpr std::uint32_t | begin_since_version = 1 |
Minimum protocol version required for the begin function. | |
static constexpr std::uint32_t | update_since_version = 1 |
Minimum protocol version required for the update function. | |
static constexpr std::uint32_t | end_since_version = 1 |
Minimum protocol version required for the end function. | |
a pinch gesture object
A pinch gesture object notifies a client about a multi-finger pinch gesture detected on an indirect input device such as a touchpad. The gesture is usually initiated by multiple fingers moving towards each other or away from each other, or by two or more fingers rotating around a logical center of gravity. The precise conditions of when such a gesture is detected are implementation-dependent.
A gesture consists of three stages: begin, update (optional) and end. There cannot be multiple simultaneous hold, pinch or swipe gestures on a same pointer/seat, how compositors prevent these situations is implementation-dependent.
A gesture may be cancelled by the compositor or the hardware. Clients should not consider performing permanent or irreversible actions until the end of a gesture has been received.
Definition at line 3313 of file wayland-server-protocol-unstable.hpp.
void zwp_pointer_gesture_pinch_v1_t::begin | ( | uint32_t | serial, |
uint32_t | time, | ||
surface_t const & | surface, | ||
uint32_t | fingers, | ||
bool | post = true |
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) |
multi-finger pinch begin
serial | |
time | timestamp with millisecond granularity |
surface | |
fingers | number of fingers |
This event is sent when a multi-finger pinch gesture is detected on the device.
Definition at line 5675 of file wayland-server-protocol-unstable.cpp.
void zwp_pointer_gesture_pinch_v1_t::end | ( | uint32_t | serial, |
uint32_t | time, | ||
int32_t | cancelled, | ||
bool | post = true |
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) |
multi-finger pinch end
serial | |
time | timestamp with millisecond granularity |
cancelled | 1 if the gesture was cancelled, 0 otherwise |
This event is sent when a multi-finger pinch gesture ceases to be valid. This may happen when one or more fingers are lifted or the gesture is cancelled.
When a gesture is cancelled, the client should undo state changes caused by this gesture. What causes a gesture to be cancelled is implementation-dependent.
Definition at line 5685 of file wayland-server-protocol-unstable.cpp.
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inherited |
Retrieve the interface name (class) of a resource object.
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inherited |
Get the associated client
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inherited |
Get the internal ID of the resource
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inherited |
Get interface version
std::function< void()> & zwp_pointer_gesture_pinch_v1_t::on_destroy | ( | ) |
destroy the pinch gesture object
Definition at line 5669 of file wayland-server-protocol-unstable.cpp.
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inherited |
Post "not enough memory" error to the client
If the compositor has not enough memory to fulfill a certail request of the client, this function can be called to notify the client of this circumstance.
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inherited |
Check whether this wrapper actually wraps an object.
void zwp_pointer_gesture_pinch_v1_t::update | ( | uint32_t | time, |
double | dx, | ||
double | dy, | ||
double | scale, | ||
double | rotation, | ||
bool | post = true |
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) |
multi-finger pinch motion
time | timestamp with millisecond granularity |
dx | delta x coordinate in surface coordinate space |
dy | delta y coordinate in surface coordinate space |
scale | scale relative to the initial finger position |
rotation | angle in degrees cw relative to the previous event |
This event is sent when a multi-finger pinch gesture changes the position of the logical center, the rotation or the relative scale.
The dx and dy coordinates are relative coordinates in the surface coordinate space of the logical center of the gesture.
The scale factor is an absolute scale compared to the pointer_gesture_pinch.begin event, e.g. a scale of 2 means the fingers are now twice as far apart as on pointer_gesture_pinch.begin.
The rotation is the relative angle in degrees clockwise compared to the previous pointer_gesture_pinch.begin or pointer_gesture_pinch.update event.
Definition at line 5680 of file wayland-server-protocol-unstable.cpp.
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staticconstexpr |
Minimum protocol version required for the begin function.
Definition at line 3358 of file wayland-server-protocol-unstable.hpp.
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staticconstexpr |
Minimum protocol version required for the end function.
Definition at line 3405 of file wayland-server-protocol-unstable.hpp.
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staticconstexpr |
Minimum protocol version required for the update function.
Definition at line 3385 of file wayland-server-protocol-unstable.hpp.