{- |
Copyright  : Will Thompson, Iñaki García Etxebarria and Jonas Platte
License    : LGPL-2.1
Maintainer : Iñaki García Etxebarria (garetxe@gmail.com)

'GI.Gtk.Objects.GestureZoom.GestureZoom' is a 'GI.Gtk.Objects.Gesture.Gesture' implementation able to recognize
pinch\/zoom gestures, whenever the distance between both tracked
sequences changes, the 'GI.Gtk.Objects.GestureZoom.GestureZoom'::@/scale-changed/@ signal is
emitted to report the scale factor.
-}

module GI.Gtk.Objects.GestureZoom
    ( 

-- * Exported types
    GestureZoom(..)                         ,
    IsGestureZoom                           ,
    toGestureZoom                           ,
    noGestureZoom                           ,


 -- * Methods
-- ** getScaleDelta #method:getScaleDelta#
    GestureZoomGetScaleDeltaMethodInfo      ,
    gestureZoomGetScaleDelta                ,


-- ** new #method:new#
    gestureZoomNew                          ,




 -- * Signals
-- ** scaleChanged #signal:scaleChanged#
    C_GestureZoomScaleChangedCallback       ,
    GestureZoomScaleChangedCallback         ,
    GestureZoomScaleChangedSignalInfo       ,
    afterGestureZoomScaleChanged            ,
    genClosure_GestureZoomScaleChanged      ,
    mk_GestureZoomScaleChangedCallback      ,
    noGestureZoomScaleChangedCallback       ,
    onGestureZoomScaleChanged               ,
    wrap_GestureZoomScaleChangedCallback    ,




    ) where

import Data.GI.Base.ShortPrelude
import qualified Data.GI.Base.ShortPrelude as SP
import qualified Data.GI.Base.Overloading as O
import qualified Prelude as P

import qualified Data.GI.Base.Attributes as GI.Attributes
import qualified Data.GI.Base.ManagedPtr as B.ManagedPtr
import qualified Data.GI.Base.GError as B.GError
import qualified Data.GI.Base.GVariant as B.GVariant
import qualified Data.GI.Base.GParamSpec as B.GParamSpec
import qualified Data.GI.Base.CallStack as B.CallStack
import qualified Data.Text as T
import qualified Data.ByteString.Char8 as B
import qualified Data.Map as Map
import qualified Foreign.Ptr as FP

import qualified GI.GObject.Objects.Object as GObject.Object
import {-# SOURCE #-} qualified GI.Gtk.Objects.EventController as Gtk.EventController
import {-# SOURCE #-} qualified GI.Gtk.Objects.Gesture as Gtk.Gesture
import {-# SOURCE #-} qualified GI.Gtk.Objects.Widget as Gtk.Widget

newtype GestureZoom = GestureZoom (ManagedPtr GestureZoom)
foreign import ccall "gtk_gesture_zoom_get_type"
    c_gtk_gesture_zoom_get_type :: IO GType

instance GObject GestureZoom where
    gobjectType _ = c_gtk_gesture_zoom_get_type
    

class GObject o => IsGestureZoom o
#if MIN_VERSION_base(4,9,0)
instance {-# OVERLAPPABLE #-} (GObject a, O.UnknownAncestorError GestureZoom a) =>
    IsGestureZoom a
#endif
instance IsGestureZoom GestureZoom
instance Gtk.Gesture.IsGesture GestureZoom
instance Gtk.EventController.IsEventController GestureZoom
instance GObject.Object.IsObject GestureZoom

toGestureZoom :: IsGestureZoom o => o -> IO GestureZoom
toGestureZoom = unsafeCastTo GestureZoom

noGestureZoom :: Maybe GestureZoom
noGestureZoom = Nothing

type family ResolveGestureZoomMethod (t :: Symbol) (o :: *) :: * where
    ResolveGestureZoomMethod "bindProperty" o = GObject.Object.ObjectBindPropertyMethodInfo
    ResolveGestureZoomMethod "bindPropertyFull" o = GObject.Object.ObjectBindPropertyFullMethodInfo
    ResolveGestureZoomMethod "forceFloating" o = GObject.Object.ObjectForceFloatingMethodInfo
    ResolveGestureZoomMethod "freezeNotify" o = GObject.Object.ObjectFreezeNotifyMethodInfo
    ResolveGestureZoomMethod "group" o = Gtk.Gesture.GestureGroupMethodInfo
    ResolveGestureZoomMethod "handleEvent" o = Gtk.EventController.EventControllerHandleEventMethodInfo
    ResolveGestureZoomMethod "handlesSequence" o = Gtk.Gesture.GestureHandlesSequenceMethodInfo
    ResolveGestureZoomMethod "isActive" o = Gtk.Gesture.GestureIsActiveMethodInfo
    ResolveGestureZoomMethod "isFloating" o = GObject.Object.ObjectIsFloatingMethodInfo
    ResolveGestureZoomMethod "isGroupedWith" o = Gtk.Gesture.GestureIsGroupedWithMethodInfo
    ResolveGestureZoomMethod "isRecognized" o = Gtk.Gesture.GestureIsRecognizedMethodInfo
    ResolveGestureZoomMethod "notify" o = GObject.Object.ObjectNotifyMethodInfo
    ResolveGestureZoomMethod "notifyByPspec" o = GObject.Object.ObjectNotifyByPspecMethodInfo
    ResolveGestureZoomMethod "ref" o = GObject.Object.ObjectRefMethodInfo
    ResolveGestureZoomMethod "refSink" o = GObject.Object.ObjectRefSinkMethodInfo
    ResolveGestureZoomMethod "replaceData" o = GObject.Object.ObjectReplaceDataMethodInfo
    ResolveGestureZoomMethod "replaceQdata" o = GObject.Object.ObjectReplaceQdataMethodInfo
    ResolveGestureZoomMethod "reset" o = Gtk.EventController.EventControllerResetMethodInfo
    ResolveGestureZoomMethod "runDispose" o = GObject.Object.ObjectRunDisposeMethodInfo
    ResolveGestureZoomMethod "stealData" o = GObject.Object.ObjectStealDataMethodInfo
    ResolveGestureZoomMethod "stealQdata" o = GObject.Object.ObjectStealQdataMethodInfo
    ResolveGestureZoomMethod "thawNotify" o = GObject.Object.ObjectThawNotifyMethodInfo
    ResolveGestureZoomMethod "ungroup" o = Gtk.Gesture.GestureUngroupMethodInfo
    ResolveGestureZoomMethod "unref" o = GObject.Object.ObjectUnrefMethodInfo
    ResolveGestureZoomMethod "watchClosure" o = GObject.Object.ObjectWatchClosureMethodInfo
    ResolveGestureZoomMethod "getBoundingBox" o = Gtk.Gesture.GestureGetBoundingBoxMethodInfo
    ResolveGestureZoomMethod "getBoundingBoxCenter" o = Gtk.Gesture.GestureGetBoundingBoxCenterMethodInfo
    ResolveGestureZoomMethod "getData" o = GObject.Object.ObjectGetDataMethodInfo
    ResolveGestureZoomMethod "getDevice" o = Gtk.Gesture.GestureGetDeviceMethodInfo
    ResolveGestureZoomMethod "getGroup" o = Gtk.Gesture.GestureGetGroupMethodInfo
    ResolveGestureZoomMethod "getLastEvent" o = Gtk.Gesture.GestureGetLastEventMethodInfo
    ResolveGestureZoomMethod "getLastUpdatedSequence" o = Gtk.Gesture.GestureGetLastUpdatedSequenceMethodInfo
    ResolveGestureZoomMethod "getPoint" o = Gtk.Gesture.GestureGetPointMethodInfo
    ResolveGestureZoomMethod "getPropagationPhase" o = Gtk.EventController.EventControllerGetPropagationPhaseMethodInfo
    ResolveGestureZoomMethod "getProperty" o = GObject.Object.ObjectGetPropertyMethodInfo
    ResolveGestureZoomMethod "getQdata" o = GObject.Object.ObjectGetQdataMethodInfo
    ResolveGestureZoomMethod "getScaleDelta" o = GestureZoomGetScaleDeltaMethodInfo
    ResolveGestureZoomMethod "getSequenceState" o = Gtk.Gesture.GestureGetSequenceStateMethodInfo
    ResolveGestureZoomMethod "getSequences" o = Gtk.Gesture.GestureGetSequencesMethodInfo
    ResolveGestureZoomMethod "getWidget" o = Gtk.EventController.EventControllerGetWidgetMethodInfo
    ResolveGestureZoomMethod "getWindow" o = Gtk.Gesture.GestureGetWindowMethodInfo
    ResolveGestureZoomMethod "setData" o = GObject.Object.ObjectSetDataMethodInfo
    ResolveGestureZoomMethod "setPropagationPhase" o = Gtk.EventController.EventControllerSetPropagationPhaseMethodInfo
    ResolveGestureZoomMethod "setProperty" o = GObject.Object.ObjectSetPropertyMethodInfo
    ResolveGestureZoomMethod "setSequenceState" o = Gtk.Gesture.GestureSetSequenceStateMethodInfo
    ResolveGestureZoomMethod "setState" o = Gtk.Gesture.GestureSetStateMethodInfo
    ResolveGestureZoomMethod "setWindow" o = Gtk.Gesture.GestureSetWindowMethodInfo
    ResolveGestureZoomMethod l o = O.MethodResolutionFailed l o

instance (info ~ ResolveGestureZoomMethod t GestureZoom, O.MethodInfo info GestureZoom p) => O.IsLabelProxy t (GestureZoom -> p) where
    fromLabelProxy _ = O.overloadedMethod (O.MethodProxy :: O.MethodProxy info)

#if MIN_VERSION_base(4,9,0)
instance (info ~ ResolveGestureZoomMethod t GestureZoom, O.MethodInfo info GestureZoom p) => O.IsLabel t (GestureZoom -> p) where
    fromLabel _ = O.overloadedMethod (O.MethodProxy :: O.MethodProxy info)
#endif

-- signal GestureZoom::scale-changed
type GestureZoomScaleChangedCallback =
    Double ->
    IO ()

noGestureZoomScaleChangedCallback :: Maybe GestureZoomScaleChangedCallback
noGestureZoomScaleChangedCallback = Nothing

type C_GestureZoomScaleChangedCallback =
    Ptr () ->                               -- object
    CDouble ->
    Ptr () ->                               -- user_data
    IO ()

foreign import ccall "wrapper"
    mk_GestureZoomScaleChangedCallback :: C_GestureZoomScaleChangedCallback -> IO (FunPtr C_GestureZoomScaleChangedCallback)

genClosure_GestureZoomScaleChanged :: GestureZoomScaleChangedCallback -> IO Closure
genClosure_GestureZoomScaleChanged cb = do
    let cb' = wrap_GestureZoomScaleChangedCallback cb
    mk_GestureZoomScaleChangedCallback cb' >>= newCClosure


wrap_GestureZoomScaleChangedCallback ::
    GestureZoomScaleChangedCallback ->
    Ptr () ->
    CDouble ->
    Ptr () ->
    IO ()
wrap_GestureZoomScaleChangedCallback _cb _ scale _ = do
    let scale' = realToFrac scale
    _cb  scale'


onGestureZoomScaleChanged :: (GObject a, MonadIO m) => a -> GestureZoomScaleChangedCallback -> m SignalHandlerId
onGestureZoomScaleChanged obj cb = liftIO $ connectGestureZoomScaleChanged obj cb SignalConnectBefore
afterGestureZoomScaleChanged :: (GObject a, MonadIO m) => a -> GestureZoomScaleChangedCallback -> m SignalHandlerId
afterGestureZoomScaleChanged obj cb = connectGestureZoomScaleChanged obj cb SignalConnectAfter

connectGestureZoomScaleChanged :: (GObject a, MonadIO m) =>
                                  a -> GestureZoomScaleChangedCallback -> SignalConnectMode -> m SignalHandlerId
connectGestureZoomScaleChanged obj cb after = liftIO $ do
    let cb' = wrap_GestureZoomScaleChangedCallback cb
    cb'' <- mk_GestureZoomScaleChangedCallback cb'
    connectSignalFunPtr obj "scale-changed" cb'' after

instance O.HasAttributeList GestureZoom
type instance O.AttributeList GestureZoom = GestureZoomAttributeList
type GestureZoomAttributeList = ('[ '("nPoints", Gtk.Gesture.GestureNPointsPropertyInfo), '("propagationPhase", Gtk.EventController.EventControllerPropagationPhasePropertyInfo), '("widget", Gtk.EventController.EventControllerWidgetPropertyInfo), '("window", Gtk.Gesture.GestureWindowPropertyInfo)] :: [(Symbol, *)])

data GestureZoomScaleChangedSignalInfo
instance SignalInfo GestureZoomScaleChangedSignalInfo where
    type HaskellCallbackType GestureZoomScaleChangedSignalInfo = GestureZoomScaleChangedCallback
    connectSignal _ = connectGestureZoomScaleChanged

type instance O.SignalList GestureZoom = GestureZoomSignalList
type GestureZoomSignalList = ('[ '("begin", Gtk.Gesture.GestureBeginSignalInfo), '("cancel", Gtk.Gesture.GestureCancelSignalInfo), '("end", Gtk.Gesture.GestureEndSignalInfo), '("notify", GObject.Object.ObjectNotifySignalInfo), '("scaleChanged", GestureZoomScaleChangedSignalInfo), '("sequenceStateChanged", Gtk.Gesture.GestureSequenceStateChangedSignalInfo), '("update", Gtk.Gesture.GestureUpdateSignalInfo)] :: [(Symbol, *)])

-- method GestureZoom::new
-- method type : Constructor
-- Args : [Arg {argCName = "widget", argType = TInterface (Name {namespace = "Gtk", name = "Widget"}), direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "a #GtkWidget", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing}]
-- Lengths : []
-- returnType : Just (TInterface (Name {namespace = "Gtk", name = "GestureZoom"}))
-- throws : False
-- Skip return : False

foreign import ccall "gtk_gesture_zoom_new" gtk_gesture_zoom_new :: 
    Ptr Gtk.Widget.Widget ->                -- widget : TInterface (Name {namespace = "Gtk", name = "Widget"})
    IO (Ptr GestureZoom)

{- |
Returns a newly created 'GI.Gtk.Objects.Gesture.Gesture' that recognizes zoom
in\/out gestures (usually known as pinch\/zoom).

@since 3.14
-}
gestureZoomNew ::
    (B.CallStack.HasCallStack, MonadIO m, Gtk.Widget.IsWidget a) =>
    a
    {- ^ /@widget@/: a 'GI.Gtk.Objects.Widget.Widget' -}
    -> m GestureZoom
    {- ^ __Returns:__ a newly created 'GI.Gtk.Objects.GestureZoom.GestureZoom' -}
gestureZoomNew widget = liftIO $ do
    widget' <- unsafeManagedPtrCastPtr widget
    result <- gtk_gesture_zoom_new widget'
    checkUnexpectedReturnNULL "gestureZoomNew" result
    result' <- (wrapObject GestureZoom) result
    touchManagedPtr widget
    return result'

-- method GestureZoom::get_scale_delta
-- method type : OrdinaryMethod
-- Args : [Arg {argCName = "gesture", argType = TInterface (Name {namespace = "Gtk", name = "GestureZoom"}), direction = DirectionIn, mayBeNull = False, argDoc = Documentation {rawDocText = Just "a #GtkGestureZoom", sinceVersion = Nothing}, argScope = ScopeTypeInvalid, argClosure = -1, argDestroy = -1, argCallerAllocates = False, transfer = TransferNothing}]
-- Lengths : []
-- returnType : Just (TBasicType TDouble)
-- throws : False
-- Skip return : False

foreign import ccall "gtk_gesture_zoom_get_scale_delta" gtk_gesture_zoom_get_scale_delta :: 
    Ptr GestureZoom ->                      -- gesture : TInterface (Name {namespace = "Gtk", name = "GestureZoom"})
    IO CDouble

{- |
If /@gesture@/ is active, this function returns the zooming difference
since the gesture was recognized (hence the starting point is
considered 1:1). If /@gesture@/ is not active, 1 is returned.

@since 3.14
-}
gestureZoomGetScaleDelta ::
    (B.CallStack.HasCallStack, MonadIO m, IsGestureZoom a) =>
    a
    {- ^ /@gesture@/: a 'GI.Gtk.Objects.GestureZoom.GestureZoom' -}
    -> m Double
    {- ^ __Returns:__ the scale delta -}
gestureZoomGetScaleDelta gesture = liftIO $ do
    gesture' <- unsafeManagedPtrCastPtr gesture
    result <- gtk_gesture_zoom_get_scale_delta gesture'
    let result' = realToFrac result
    touchManagedPtr gesture
    return result'

data GestureZoomGetScaleDeltaMethodInfo
instance (signature ~ (m Double), MonadIO m, IsGestureZoom a) => O.MethodInfo GestureZoomGetScaleDeltaMethodInfo a signature where
    overloadedMethod _ = gestureZoomGetScaleDelta