| Copyright | Will Thompson and Iñaki García Etxebarria |
|---|---|
| License | LGPL-2.1 |
| Maintainer | Iñaki García Etxebarria |
| Safe Haskell | None |
| Language | Haskell2010 |
GI.Gdk.Interfaces.DragSurface
Description
A GdkDragSurface is an interface for surfaces used during DND.
Synopsis
- newtype DragSurface = DragSurface (ManagedPtr DragSurface)
- class (GObject o, IsDescendantOf DragSurface o) => IsDragSurface o
- toDragSurface :: (MonadIO m, IsDragSurface o) => o -> m DragSurface
- dragSurfacePresent :: (HasCallStack, MonadIO m, IsDragSurface a) => a -> Int32 -> Int32 -> m Bool
- type DragSurfaceComputeSizeCallback = DragSurfaceSize -> IO ()
- afterDragSurfaceComputeSize :: (IsDragSurface a, MonadIO m) => a -> ((?self :: a) => DragSurfaceComputeSizeCallback) -> m SignalHandlerId
- onDragSurfaceComputeSize :: (IsDragSurface a, MonadIO m) => a -> ((?self :: a) => DragSurfaceComputeSizeCallback) -> m SignalHandlerId
Exported types
newtype DragSurface Source #
Memory-managed wrapper type.
Constructors
| DragSurface (ManagedPtr DragSurface) |
Instances
| Eq DragSurface Source # | |
Defined in GI.Gdk.Interfaces.DragSurface | |
| GObject DragSurface Source # | |
Defined in GI.Gdk.Interfaces.DragSurface | |
| ManagedPtrNewtype DragSurface Source # | |
Defined in GI.Gdk.Interfaces.DragSurface Methods | |
| TypedObject DragSurface Source # | |
Defined in GI.Gdk.Interfaces.DragSurface | |
| HasParentTypes DragSurface Source # | |
Defined in GI.Gdk.Interfaces.DragSurface | |
| IsGValue (Maybe DragSurface) Source # | Convert |
Defined in GI.Gdk.Interfaces.DragSurface Methods gvalueGType_ :: IO GType # gvalueSet_ :: Ptr GValue -> Maybe DragSurface -> IO () # gvalueGet_ :: Ptr GValue -> IO (Maybe DragSurface) # | |
| type ParentTypes DragSurface Source # | |
Defined in GI.Gdk.Interfaces.DragSurface | |
class (GObject o, IsDescendantOf DragSurface o) => IsDragSurface o Source #
Type class for types which can be safely cast to DragSurface, for instance with toDragSurface.
Instances
| (GObject o, IsDescendantOf DragSurface o) => IsDragSurface o Source # | |
Defined in GI.Gdk.Interfaces.DragSurface | |
toDragSurface :: (MonadIO m, IsDragSurface o) => o -> m DragSurface Source #
Cast to DragSurface, for types for which this is known to be safe. For general casts, use castTo.
Methods
Click to display all available methods, including inherited ones
Methods
beep, bindProperty, bindPropertyFull, createCairoContext, createGlContext, createSimilarSurface, createVulkanContext, destroy, forceFloating, freezeNotify, getv, hide, isDestroyed, isFloating, notify, notifyByPspec, present, queueRender, ref, refSink, requestLayout, runDispose, stealData, stealQdata, thawNotify, translateCoordinates, unref, watchClosure.
Getters
getCursor, getData, getDeviceCursor, getDevicePosition, getDisplay, getFrameClock, getHeight, getMapped, getProperty, getQdata, getScale, getScaleFactor, getWidth.
Setters
setCursor, setData, setDataFull, setDeviceCursor, setInputRegion, setOpaqueRegion, setProperty.
present
Arguments
| :: (HasCallStack, MonadIO m, IsDragSurface a) | |
| => a |
|
| -> Int32 |
|
| -> Int32 |
|
| -> m Bool | Returns: |
Present dragSurface.
Signals
computeSize
type DragSurfaceComputeSizeCallback Source #
Arguments
| = DragSurfaceSize |
|
| -> IO () |
Emitted when the size for the surface needs to be computed, when it is present.
This signal will normally be emitted during the native surface layout cycle when the surface size needs to be recomputed.
It is the responsibility of the drag surface user to handle this signal
and compute the desired size of the surface, storing the computed size
in the [structgdk.DragSurfaceSize] object that is passed to the signal
handler, using dragSurfaceSizeSetSize.
Failing to set a size so will result in an arbitrary size being used as a result.
Since: 4.12
afterDragSurfaceComputeSize :: (IsDragSurface a, MonadIO m) => a -> ((?self :: a) => DragSurfaceComputeSizeCallback) -> m SignalHandlerId Source #
Connect a signal handler for the computeSize signal, to be run after the default handler. When overloading is enabled, this is equivalent to
after dragSurface #computeSize callback
By default the object invoking the signal is not passed to the callback.
If you need to access it, you can use the implit ?self parameter.
Note that this requires activating the ImplicitParams GHC extension.
onDragSurfaceComputeSize :: (IsDragSurface a, MonadIO m) => a -> ((?self :: a) => DragSurfaceComputeSizeCallback) -> m SignalHandlerId Source #
Connect a signal handler for the computeSize signal, to be run before the default handler. When overloading is enabled, this is equivalent to
on dragSurface #computeSize callback