class new in Git master
#include <Magnum/Ui/EventLayer.h>
EventLayer Event handling layer.
Provides signal/slot-like functionality, connecting events happening on nodes with aribtrary functions handling them.
Base classes
- class AbstractLayer new in Git master
- Base for data layers.
Constructors, destructors, conversion operators
- EventLayer(LayerHandle handle) explicit
- Constructor.
- EventLayer(const EventLayer&) deleted
- Copying is not allowed.
- EventLayer(EventLayer&&) noexcept
- Move constructor.
- ~EventLayer() override
- Destructor.
Public functions
- auto operator=(const EventLayer&) -> EventLayer& deleted
- Copying is not allowed.
- auto operator=(EventLayer&&) -> EventLayer& noexcept
- Move assignment.
- auto usedScopedConnectionCount() const -> UnsignedInt
- Count of currently active EventConnection instances.
- auto usedAllocatedConnectionCount() const -> UnsignedInt
- Count of allocated connections.
-
auto onPress(NodeHandle node,
Containers::
Function<void()>&& slot) -> DataHandle - Connect to a finger / pen tap or left mouse press.
-
auto onPressScoped(NodeHandle node,
Containers::
Function<void()>&& slot) -> EventConnection - Scoped connection to a finger / pen tap or left mouse press.
-
auto onRelease(NodeHandle node,
Containers::
Function<void()>&& slot) -> DataHandle - Connect to a finger / pen tap or left mouse release.
-
auto onReleaseScoped(NodeHandle node,
Containers::
Function<void()>&& slot) -> EventConnection - Scoped connection to a finger / pen tap or left mouse release.
-
auto onTapOrClick(NodeHandle node,
Containers::
Function<void()>&& slot) -> DataHandle - Connect to a finger / pen tap or left mouse click.
-
auto onTapOrClickScoped(NodeHandle node,
Containers::
Function<void()>&& slot) -> EventConnection - Scoped connection to a finger / pen tap or left mouse click.
-
auto onMiddleClick(NodeHandle node,
Containers::
Function<void()>&& slot) -> DataHandle - Connect to a middle mouse click.
-
auto onMiddleClickScoped(NodeHandle node,
Containers::
Function<void()>&& slot) -> EventConnection - Scoped connection to a middle mouse click.
-
auto onRightClick(NodeHandle node,
Containers::
Function<void()>&& slot) -> DataHandle - Connect to a right mouse click.
-
auto onRightClickScoped(NodeHandle node,
Containers::
Function<void()>&& slot) -> EventConnection - Scoped connection to a right mouse click.
-
auto onDrag(NodeHandle node,
Containers::
Function<void(const Vector2&)>&& slot) -> DataHandle - Connect to a drag.
-
auto onDragScoped(NodeHandle node,
Containers::
Function<void(const Vector2&)>&& slot) -> EventConnection - Scoped connection to a drag.
-
auto onEnter(NodeHandle node,
Containers::
Function<void()>&& slot) -> DataHandle - Connect to a pointer enter.
-
auto onEnterScoped(NodeHandle node,
Containers::
Function<void()>&& slot) -> EventConnection - Scoped connection to a pointer enter.
-
auto onLeave(NodeHandle node,
Containers::
Function<void()>&& slot) -> DataHandle - Connect to a pointer leave.
-
auto onLeaveScoped(NodeHandle node,
Containers::
Function<void()>&& slot) -> EventConnection - Scoped connection to a pointer leave.
-
auto onFocus(NodeHandle node,
Containers::
Function<void()>&& slot) -> DataHandle - Connect to a focus.
-
auto onFocusScoped(NodeHandle node,
Containers::
Function<void()>&& slot) -> EventConnection - Scoped connection to a focus.
-
auto onBlur(NodeHandle node,
Containers::
Function<void()>&& slot) -> DataHandle - Connect to a blur.
-
auto onBlurScoped(NodeHandle node,
Containers::
Function<void()>&& slot) -> EventConnection - Scoped connection to a pointer leave.
- void remove(DataHandle handle)
- Remove a connection.
- void remove(LayerDataHandle handle)
- Remove a connection assuming it belongs to this layer.
Function documentation
Magnum:: Ui:: EventLayer:: EventLayer(LayerHandle handle) explicit
Constructor.
Parameters | |
---|---|
handle | Layer handle returned from AbstractUserInterface:: |
Magnum:: Ui:: EventLayer:: EventLayer(EventLayer&&) noexcept
Move constructor.
Performs a destructive move, i.e. the original object isn't usable afterwards anymore.
Magnum:: Ui:: EventLayer:: ~EventLayer() override
Destructor.
Expects that usedScopedConnectionCount() is 0
.
UnsignedInt Magnum:: Ui:: EventLayer:: usedScopedConnectionCount() const
Count of currently active EventConnection instances.
Always at most usedCount(). The layer is only allowed to be destroyed after all scoped connections are removed, as the EventConnection destructors would then access a dangling layer pointer.
UnsignedInt Magnum:: Ui:: EventLayer:: usedAllocatedConnectionCount() const
Count of allocated connections.
Always at most usedCount(). Counts all connections that capture non-trivially-destructible state or state that's too large to be stored in-place. The operation is done with a complexity where is capacity().
DataHandle Magnum:: Ui:: EventLayer:: onPress(NodeHandle node,
Containers:: Function<void()>&& slot)
Connect to a finger / pen tap or left mouse press.
The slot
is called when a Pointer::node
.
Use onTapOrClick() for a combined press and release. The returned DataHandle is automatically removed once node
or any of its parents is removed, it's the caller responsibility to ensure it doesn't outlive the state captured in the slot
. See onPressScoped() for a scoped alternative.
EventConnection Magnum:: Ui:: EventLayer:: onPressScoped(NodeHandle node,
Containers:: Function<void()>&& slot)
Scoped connection to a finger / pen tap or left mouse press.
Compared to onPress() the connection is removed automatically when the returned EventConnection gets destroyed.
DataHandle Magnum:: Ui:: EventLayer:: onRelease(NodeHandle node,
Containers:: Function<void()>&& slot)
Connect to a finger / pen tap or left mouse release.
The slot
is called when a Pointer::node
.
Use onTapOrClick() for a combined press and release. The returned DataHandle is automatically removed once node
or any of its parents is removed, it's the caller responsibility to ensure it doesn't outlive the state captured in the slot
. See onReleaseScoped() for a scoped alternative.
EventConnection Magnum:: Ui:: EventLayer:: onReleaseScoped(NodeHandle node,
Containers:: Function<void()>&& slot)
Scoped connection to a finger / pen tap or left mouse release.
Compared to onRelease() the connection is removed automatically when the returned EventConnection gets destroyed.
DataHandle Magnum:: Ui:: EventLayer:: onTapOrClick(NodeHandle node,
Containers:: Function<void()>&& slot)
Connect to a finger / pen tap or left mouse click.
The slot
is called when a Pointer::node
after a previous pointer press. If event capture is disabled by any event handler on given node, the slot is called only if the pointer didn't leave the node area between a press and a release.
Use onRightClick() and onMiddleClick() to handle Pointer::node
or any of its parents is removed, it's the caller responsibility to ensure it doesn't outlive the state captured in the slot
. See onTapOrClickScoped() for a scoped alternative.
EventConnection Magnum:: Ui:: EventLayer:: onTapOrClickScoped(NodeHandle node,
Containers:: Function<void()>&& slot)
Scoped connection to a finger / pen tap or left mouse click.
Compared to onTapOrClick() the connection is removed automatically when the returned EventConnection gets destroyed.
DataHandle Magnum:: Ui:: EventLayer:: onMiddleClick(NodeHandle node,
Containers:: Function<void()>&& slot)
Connect to a middle mouse click.
The slot
is called when a Pointer::node
after a previous pointer press. If event capture is disabled by any event handler on given node, the slot is called only if the pointer didn't leave the node area between a press and a release.
Use onTapOrClick() and onRightClick() to handle Pointer::node
or any of its parents is removed, it's the caller responsibility to ensure it doesn't outlive the state captured in the slot
. See onMiddleClickScoped() for a scoped alternative.
EventConnection Magnum:: Ui:: EventLayer:: onMiddleClickScoped(NodeHandle node,
Containers:: Function<void()>&& slot)
Scoped connection to a middle mouse click.
Compared to onMiddleClick() the connection is removed automatically when the returned EventConnection gets destroyed.
DataHandle Magnum:: Ui:: EventLayer:: onRightClick(NodeHandle node,
Containers:: Function<void()>&& slot)
Connect to a right mouse click.
The slot
is called when a Pointer::node
after a previous pointer press. If event capture is disabled by any event handler on given node, the slot is called only if the pointer didn't leave the node area between a press and a release.
Use onTapOrClick() and onRightClick() to handle Pointer::node
or any of its parents is removed, it's the caller responsibility to ensure it doesn't outlive the state captured in the slot
. See onMiddleClickScoped() for a scoped alternative.
EventConnection Magnum:: Ui:: EventLayer:: onRightClickScoped(NodeHandle node,
Containers:: Function<void()>&& slot)
Scoped connection to a right mouse click.
Compared to onRightClick() the connection is removed automatically when the returned EventConnection gets destroyed.
DataHandle Magnum:: Ui:: EventLayer:: onDrag(NodeHandle node,
Containers:: Function<void(const Vector2&)>&& slot)
Connect to a drag.
The slot
, receiving the movement delta, is called when a Pointer::node
. If event capture is disabled by any event handler on given node, the slot is called only as long as the pointer doesn't leave the node area.
The returned DataHandle is automatically removed once node
or any of its parents is removed, it's the caller responsibility to ensure it doesn't outlive the state captured in the slot
. See onDragScoped() for a scoped alternative.
EventConnection Magnum:: Ui:: EventLayer:: onDragScoped(NodeHandle node,
Containers:: Function<void(const Vector2&)>&& slot)
Scoped connection to a drag.
Compared to onDrag() the connection is removed automatically when the returned EventConnection gets destroyed.
DataHandle Magnum:: Ui:: EventLayer:: onEnter(NodeHandle node,
Containers:: Function<void()>&& slot)
Connect to a pointer enter.
The slot
is called when a pointer moves over the node
area.
Use onLeave() to hadle the opposite case. The returned DataHandle is automatically removed once node
or any of its parents is removed, it's the caller responsibility to ensure it doesn't outlive the state captured in the slot
. See onEnterScoped() for a scoped alternative.
EventConnection Magnum:: Ui:: EventLayer:: onEnterScoped(NodeHandle node,
Containers:: Function<void()>&& slot)
Scoped connection to a pointer enter.
Compared to onEnter() the connection is removed automatically when the returned EventConnection gets destroyed.
DataHandle Magnum:: Ui:: EventLayer:: onLeave(NodeHandle node,
Containers:: Function<void()>&& slot)
Connect to a pointer leave.
The slot
is called when a pointer moves out of the node
area.
Use onEnter() to hadle the opposite case. The returned DataHandle is automatically removed once node
or any of its parents is removed, it's the caller responsibility to ensure it doesn't outlive the state captured in the slot
. See onLeaveScoped() for a scoped alternative.
EventConnection Magnum:: Ui:: EventLayer:: onLeaveScoped(NodeHandle node,
Containers:: Function<void()>&& slot)
Scoped connection to a pointer leave.
Compared to onLeave() the connection is removed automatically when the returned EventConnection gets destroyed.
DataHandle Magnum:: Ui:: EventLayer:: onFocus(NodeHandle node,
Containers:: Function<void()>&& slot)
Connect to a focus.
The slot
is called when a node
is focused.
Use onBlur() to hadle the opposite case. The returned DataHandle is automatically removed once node
or any of its parents is removed, it's the caller responsibility to ensure it doesn't outlive the state captured in the slot
. See onFocusScoped() for a scoped alternative.
EventConnection Magnum:: Ui:: EventLayer:: onFocusScoped(NodeHandle node,
Containers:: Function<void()>&& slot)
Scoped connection to a focus.
Compared to onFocus() the connection is removed automatically when the returned EventConnection gets destroyed.
DataHandle Magnum:: Ui:: EventLayer:: onBlur(NodeHandle node,
Containers:: Function<void()>&& slot)
Connect to a blur.
The slot
is called when the node
is blurred.
Use onFocus() to hadle the opposite case. The returned DataHandle is automatically removed once node
or any of its parents is removed, it's the caller responsibility to ensure it doesn't outlive the state captured in the slot
. See onBlurScoped() for a scoped alternative.
EventConnection Magnum:: Ui:: EventLayer:: onBlurScoped(NodeHandle node,
Containers:: Function<void()>&& slot)
Scoped connection to a pointer leave.
Compared to onBlur() the connection is removed automatically when the returned EventConnection gets destroyed.
void Magnum:: Ui:: EventLayer:: remove(DataHandle handle)
Remove a connection.
Delegates to AbstractLayer::handle
becomes invalid, which means that any existing EventConnection instance for it will not attempt to remove it again.
void Magnum:: Ui:: EventLayer:: remove(LayerDataHandle handle)
Remove a connection assuming it belongs to this layer.
Delegates to AbstractLayer::handle
becomes invalid, which means that any existing EventConnection instance for it will not attempt to remove it again.