gi-gdk-3.0.16: Gdk bindings

Copyright Will Thompson Iñaki García Etxebarria and Jonas Platte LGPL-2.1 Iñaki García Etxebarria (garetxe@gmail.com) None Haskell2010

GI.Gdk.Structs.Geometry

Description

The Geometry struct gives the window manager information about a window’s geometry constraints. Normally you would set these on the GTK+ level using gtk_window_set_geometry_hints(). GtkWindow then sets the hints on the Window it creates.

windowSetGeometryHints expects the hints to be fully valid already and simply passes them to the window manager; in contrast, gtk_window_set_geometry_hints() performs some interpretation. For example, GtkWindow will apply the hints to the geometry widget instead of the toplevel window, if you set a geometry widget. Also, the minWidth/minHeight/maxWidth/maxHeight fields may be set to -1, and GtkWindow will substitute the size request of the window or geometry widget. If the minimum size hint is not provided, GtkWindow will use its requisition as the minimum size. If the minimum size is provided and a geometry widget is set, GtkWindow will take the minimum size as the minimum size of the geometry widget rather than the entire window. The base size is treated similarly.

The canonical use-case for gtk_window_set_geometry_hints() is to get a terminal widget to resize properly. Here, the terminal text area should be the geometry widget; GtkWindow will then automatically set the base size to the size of other widgets in the terminal window, such as the menubar and scrollbar. Then, the widthInc and heightInc fields should be set to the size of one character in the terminal. Finally, the base size should be set to the size of one character. The net effect is that the minimum size of the terminal will have a 1x1 character terminal area, and only terminal sizes on the “character grid” will be allowed.

Here’s an example of how the terminal example would be implemented, assuming a terminal area widget called “terminal” and a toplevel window “toplevel”:

### C code

	GdkGeometry hints;

hints.base_width = terminal->char_width;
hints.base_height = terminal->char_height;
hints.min_width = terminal->char_width;
hints.min_height = terminal->char_height;
hints.width_inc = terminal->char_width;
hints.height_inc = terminal->char_height;

gtk_window_set_geometry_hints (GTK_WINDOW (toplevel),
GTK_WIDGET (terminal),
&hints,
GDK_HINT_RESIZE_INC |
GDK_HINT_MIN_SIZE |
GDK_HINT_BASE_SIZE);

The other useful fields are the minAspect and maxAspect fields; these contain a width/height ratio as a floating point number. If a geometry widget is set, the aspect applies to the geometry widget rather than the entire window. The most common use of these hints is probably to set minAspect and maxAspect to the same value, thus forcing the window to keep a constant aspect ratio.

Synopsis

# Exported types

newtype Geometry Source #

Memory-managed wrapper type.

Constructors

 Geometry (ManagedPtr Geometry)
Instances
 Source # Instance detailsDefined in GI.Gdk.Structs.Geometry MethodswrappedPtrFree :: Maybe (FunPtr (Ptr Geometry -> IO ())) # tag ~ AttrSet => Constructible Geometry tag Source # Instance detailsDefined in GI.Gdk.Structs.Geometry Methodsnew :: MonadIO m => (ManagedPtr Geometry -> Geometry) -> [AttrOp Geometry tag] -> m Geometry #

Construct a Geometry struct initialized to zero.

A convenience alias for Nothing :: Maybe Geometry.

# Properties

## baseHeight

allowed window widths are baseHeight + heightInc * N where N is any integer (-1 allowed with GtkWindow)

Get the value of the “base_height” field. When overloading is enabled, this is equivalent to

get geometry #baseHeight


setGeometryBaseHeight :: MonadIO m => Geometry -> Int32 -> m () Source #

Set the value of the “base_height” field. When overloading is enabled, this is equivalent to

set geometry [ #baseHeight := value ]


## baseWidth

allowed window widths are baseWidth + widthInc * N where N is any integer (-1 allowed with GtkWindow)

Get the value of the “base_width” field. When overloading is enabled, this is equivalent to

get geometry #baseWidth


setGeometryBaseWidth :: MonadIO m => Geometry -> Int32 -> m () Source #

Set the value of the “base_width” field. When overloading is enabled, this is equivalent to

set geometry [ #baseWidth := value ]


## heightInc

height resize increment

Get the value of the “height_inc” field. When overloading is enabled, this is equivalent to

get geometry #heightInc


setGeometryHeightInc :: MonadIO m => Geometry -> Int32 -> m () Source #

Set the value of the “height_inc” field. When overloading is enabled, this is equivalent to

set geometry [ #heightInc := value ]


## maxAspect

maximum width/height ratio

Get the value of the “max_aspect” field. When overloading is enabled, this is equivalent to

get geometry #maxAspect


setGeometryMaxAspect :: MonadIO m => Geometry -> Double -> m () Source #

Set the value of the “max_aspect” field. When overloading is enabled, this is equivalent to

set geometry [ #maxAspect := value ]


## maxHeight

maximum height of window (or -1 to use requisition, with GtkWindow only)

Get the value of the “max_height” field. When overloading is enabled, this is equivalent to

get geometry #maxHeight


setGeometryMaxHeight :: MonadIO m => Geometry -> Int32 -> m () Source #

Set the value of the “max_height” field. When overloading is enabled, this is equivalent to

set geometry [ #maxHeight := value ]


## maxWidth

maximum width of window (or -1 to use requisition, with GtkWindow only)

Get the value of the “max_width” field. When overloading is enabled, this is equivalent to

get geometry #maxWidth


setGeometryMaxWidth :: MonadIO m => Geometry -> Int32 -> m () Source #

Set the value of the “max_width” field. When overloading is enabled, this is equivalent to

set geometry [ #maxWidth := value ]


## minAspect

minimum width/height ratio

Get the value of the “min_aspect” field. When overloading is enabled, this is equivalent to

get geometry #minAspect


setGeometryMinAspect :: MonadIO m => Geometry -> Double -> m () Source #

Set the value of the “min_aspect” field. When overloading is enabled, this is equivalent to

set geometry [ #minAspect := value ]


## minHeight

minimum height of window (or -1 to use requisition, with GtkWindow only)

Get the value of the “min_height” field. When overloading is enabled, this is equivalent to

get geometry #minHeight


setGeometryMinHeight :: MonadIO m => Geometry -> Int32 -> m () Source #

Set the value of the “min_height” field. When overloading is enabled, this is equivalent to

set geometry [ #minHeight := value ]


## minWidth

minimum width of window (or -1 to use requisition, with GtkWindow only)

Get the value of the “min_width” field. When overloading is enabled, this is equivalent to

get geometry #minWidth


setGeometryMinWidth :: MonadIO m => Geometry -> Int32 -> m () Source #

Set the value of the “min_width” field. When overloading is enabled, this is equivalent to

set geometry [ #minWidth := value ]


## widthInc

width resize increment

Get the value of the “width_inc” field. When overloading is enabled, this is equivalent to

get geometry #widthInc


setGeometryWidthInc :: MonadIO m => Geometry -> Int32 -> m () Source #

Set the value of the “width_inc” field. When overloading is enabled, this is equivalent to

set geometry [ #widthInc := value ]


## winGravity

window gravity, see gtk_window_set_gravity()

Get the value of the “win_gravity” field. When overloading is enabled, this is equivalent to

get geometry #winGravity


setGeometryWinGravity :: MonadIO m => Geometry -> Gravity -> m () Source #

Set the value of the “win_gravity” field. When overloading is enabled, this is equivalent to

set geometry [ #winGravity := value ]