gtk-0.14.10: Binding to the Gtk+ graphical user interface library.

Maintainergtk2hs-users@lists.sourceforge.net
Stabilityprovisional
Portabilityportable (depends on GHC)
Safe HaskellNone
LanguageHaskell98

Graphics.UI.Gtk.Gdk.Gdk

Description

Gdk general functions.

Synopsis

Documentation

flush :: IO () Source #

Flushes the X output buffer and waits until all requests have been processed by the server. This is rarely needed by applications.

screenWidth :: IO Int Source #

Returns the width of the default screen in pixels.

screenHeight :: IO Int Source #

Returns the height of the default screen in pixels.

screenWidthMM :: IO Int Source #

Returns the width of the default screen in millimeters. Note that on many X servers this value will not be correct.

screenHeightMM :: IO Int Source #

Returns the height of the default screen in millimeters. Note that on many X servers this value will not be correct.

data GrabStatus Source #

Instances

Enum GrabStatus Source #

Specifies why a selection ownership was changed.

OwnerChangeNewOwner
some other application claimed the ownership
OwnerChangeDestroy
the window was destroyed
OwnerChangeClose
the client was closed
Eq GrabStatus Source # 
Show GrabStatus Source # 

pointerGrab Source #

Arguments

:: (DrawWindowClass window, DrawWindowClass confine_to) 
=> window

window - the DrawWindow which will own the grab (the grab window).

-> Bool

owner_events - if False then all pointer events are reported with respect to window and are only reported if selected by event_mask. If True then pointer events for this application are reported as normal, but pointer events outside this application are reported with respect to window and only if selected by event_mask. In either mode, unreported events are discarded.

-> [EventMask]

event_mask - specifies the event mask, which is used in accordance with owner_events. Note that only pointer events (i.e. button and motion events) may be selected.

-> Maybe confine_to

confine_to If supplied, the pointer will be confined to this window during the grab. If the pointer is outside confine_to, it will automatically be moved to the closest edge of confine_to and enter and leave events will be generated as necessary.

-> Maybe Cursor

cursor - the cursor to display while the grab is active. If this is Nothing then the normal cursors are used for window and its descendants, and the cursor for window is used for all other windows.

-> TimeStamp

time - the timestamp of the event which led to this pointer grab. This usually comes from an Event, though currentTime can be used if the time isn't known.

-> IO GrabStatus

Returns - GrabSuccess if the grab was successful.

Grabs the pointer (usually a mouse) so that all events are passed to this application until the pointer is ungrabbed with pointerUngrab, or the grab window becomes unviewable. This overrides any previous pointer grab by this client.

Pointer grabs are used for operations which need complete control over mouse events, even if the mouse leaves the application. For example in GTK+ it is used for Drag and Drop, for dragging the handle in the GtkHPaned and GtkVPaned widgets, and for resizing columns in GtkCList widgets.

Note that if the event mask of an X window has selected both button press and button release events, then a button press event will cause an automatic pointer grab until the button is released. X does this automatically since most applications expect to receive button press and release events in pairs. It is equivalent to a pointer grab on the window with owner_events set to True.

If you set up anything at the time you take the grab that needs to be cleaned up when the grab ends, you should handle the GdkEventGrabBroken events that are emitted when the grab ends unvoluntarily.

pointerUngrab Source #

Arguments

:: TimeStamp

time - a timestamp from an Event, or currentTime if no timestamp is available.

-> IO () 

Ungrabs the pointer on the default display, if it is grabbed by this application.

pointerIsGrabbed :: IO Bool Source #

Returns True if the pointer on the default display is currently grabbed by this application.

Note that this does not take the inmplicit pointer grab on button presses into account.

keyboardGrab Source #

Arguments

:: DrawWindowClass window 
=> window

window - the DrawWindow which will own the grab (the grab window).

-> Bool

owner_events - if False then all keyboard events are reported with respect to window. If True then keyboard events for this application are reported as normal, but keyboard events outside this application are reported with respect to window. Both key press and key release events are always reported, independant of the event mask set by the application.

-> TimeStamp

time - a timestamp from an Event, or currentTime if no timestamp is available.

-> IO GrabStatus

Returns - GrabSuccess if the grab was successful.

Grabs the keyboard so that all events are passed to this application until the keyboard is ungrabbed with keyboardUngrab. This overrides any previous keyboard grab by this client.

If you set up anything at the time you take the grab that needs to be cleaned up when the grab ends, you should handle the GdkEventGrabBroken events that are emitted when the grab ends unvoluntarily.

keyboardUngrab Source #

Arguments

:: TimeStamp

time - a timestamp from an Event, or currentTime if no timestamp is available.

-> IO () 

Ungrabs the keyboard on the default display, if it is grabbed by this application.

beep :: IO () Source #

Emits a short beep.