Top |
Functions
Properties
GtkAdjustment * | hadjustment | Read / Write / Construct |
GtkPolicyType | hscrollbar-policy | Read / Write |
gboolean | kinetic-scrolling | Read / Write |
gint | min-content-height | Read / Write |
gint | min-content-width | Read / Write |
GtkShadowType | shadow-type | Read / Write |
GtkAdjustment * | vadjustment | Read / Write / Construct |
GtkPolicyType | vscrollbar-policy | Read / Write |
GtkCornerType | window-placement | Read / Write |
gboolean | window-placement-set | Read / Write |
Types and Values
struct | GtkScrolledWindow |
struct | GtkScrolledWindowClass |
enum | GtkPolicyType |
enum | GtkCornerType |
Object Hierarchy
GObject ╰── GInitiallyUnowned ╰── GtkWidget ╰── GtkContainer ╰── GtkBin ╰── GtkScrolledWindow ╰── GtkPlacesSidebar
Description
GtkScrolledWindow is a GtkBin subclass: it’s a container the accepts a single child widget. GtkScrolledWindow adds scrollbars to the child widget and optionally draws a beveled frame around the child widget.
The scrolled window can work in two ways. Some widgets have native scrolling support; these widgets implement the GtkScrollable interface. Widgets with native scroll support include GtkTreeView, GtkTextView, and GtkLayout.
For widgets that lack native scrolling support, the GtkViewport widget acts as an adaptor class, implementing scrollability for child widgets that lack their own scrolling capabilities. Use GtkViewport to scroll child widgets such as GtkGrid, GtkBox, and so on.
If a widget has native scrolling abilities, it can be added to the
GtkScrolledWindow with gtk_container_add()
. If a widget does not, you
must first add the widget to a GtkViewport, then add the GtkViewport
to the scrolled window. gtk_container_add()
will do this for you for
widgets that don’t implement GtkScrollable natively, so you can
ignore the presence of the viewport.
The position of the scrollbars is controlled by the scroll adjustments. See GtkAdjustment for the fields in an adjustment - for GtkScrollbar, used by GtkScrolledWindow, the “value” field represents the position of the scrollbar, which must be between the “lower” field and “upper - page_size.” The “page_size” field represents the size of the visible scrollable area. The “step_increment” and “page_increment” fields are used when the user asks to step down (using the small stepper arrows) or page down (using for example the PageDown key).
If a GtkScrolledWindow doesn’t behave quite as you would like, or doesn’t have exactly the right layout, it’s very possible to set up your own scrolling with GtkScrollbar and for example a GtkGrid.
Functions
gtk_scrolled_window_new ()
GtkWidget * gtk_scrolled_window_new (GtkAdjustment *hadjustment
,GtkAdjustment *vadjustment
);
Creates a new scrolled window.
The two arguments are the scrolled window’s adjustments; these will be
shared with the scrollbars and the child widget to keep the bars in sync
with the child. Usually you want to pass NULL
for the adjustments, which
will cause the scrolled window to create them for you.
gtk_scrolled_window_get_hadjustment ()
GtkAdjustment *
gtk_scrolled_window_get_hadjustment (GtkScrolledWindow *scrolled_window
);
Returns the horizontal scrollbar’s adjustment, used to connect the horizontal scrollbar to the child widget’s horizontal scroll functionality.
gtk_scrolled_window_get_vadjustment ()
GtkAdjustment *
gtk_scrolled_window_get_vadjustment (GtkScrolledWindow *scrolled_window
);
Returns the vertical scrollbar’s adjustment, used to connect the vertical scrollbar to the child widget’s vertical scroll functionality.
gtk_scrolled_window_get_hscrollbar ()
GtkWidget *
gtk_scrolled_window_get_hscrollbar (GtkScrolledWindow *scrolled_window
);
Returns the horizontal scrollbar of scrolled_window
.
Since 2.8
gtk_scrolled_window_get_vscrollbar ()
GtkWidget *
gtk_scrolled_window_get_vscrollbar (GtkScrolledWindow *scrolled_window
);
Returns the vertical scrollbar of scrolled_window
.
Since 2.8
gtk_scrolled_window_set_policy ()
void gtk_scrolled_window_set_policy (GtkScrolledWindow *scrolled_window
,GtkPolicyType hscrollbar_policy
,GtkPolicyType vscrollbar_policy
);
Sets the scrollbar policy for the horizontal and vertical scrollbars.
The policy determines when the scrollbar should appear; it is a value
from the GtkPolicyType enumeration. If GTK_POLICY_ALWAYS
, the
scrollbar is always present; if GTK_POLICY_NEVER
, the scrollbar is
never present; if GTK_POLICY_AUTOMATIC
, the scrollbar is present only
if needed (that is, if the slider part of the bar would be smaller
than the trough - the display is larger than the page size).
gtk_scrolled_window_add_with_viewport ()
void gtk_scrolled_window_add_with_viewport (GtkScrolledWindow *scrolled_window
,GtkWidget *child
);
gtk_scrolled_window_add_with_viewport
has been deprecated since version 3.8 and should not be used in newly-written code.
gtk_container_add() will now automatically add a GtkViewport if the child doesn’t implement GtkScrollable.
Used to add children without native scrolling capabilities. This
is simply a convenience function; it is equivalent to adding the
unscrollable child to a viewport, then adding the viewport to the
scrolled window. If a child has native scrolling, use
gtk_container_add()
instead of this function.
The viewport scrolls the child by moving its GdkWindow, and takes the size of the child to be the size of its toplevel GdkWindow. This will be very wrong for most widgets that support native scrolling; for example, if you add a widget such as GtkTreeView with a viewport, the whole widget will scroll, including the column headings. Thus, widgets with native scrolling support should not be used with the GtkViewport proxy.
A widget supports scrolling natively if it implements the GtkScrollable interface.
gtk_scrolled_window_set_placement ()
void gtk_scrolled_window_set_placement (GtkScrolledWindow *scrolled_window
,GtkCornerType window_placement
);
Sets the placement of the contents with respect to the scrollbars for the scrolled window.
The default is GTK_CORNER_TOP_LEFT
, meaning the child is
in the top left, with the scrollbars underneath and to the right.
Other values in GtkCornerType are GTK_CORNER_TOP_RIGHT
,
GTK_CORNER_BOTTOM_LEFT
, and GTK_CORNER_BOTTOM_RIGHT
.
See also gtk_scrolled_window_get_placement()
and
gtk_scrolled_window_unset_placement()
.
gtk_scrolled_window_unset_placement ()
void
gtk_scrolled_window_unset_placement (GtkScrolledWindow *scrolled_window
);
Unsets the placement of the contents with respect to the scrollbars for the scrolled window. If no window placement is set for a scrolled window, it defaults to GTK_CORNER_TOP_LEFT.
See also gtk_scrolled_window_set_placement()
and
gtk_scrolled_window_get_placement()
.
Since 2.10
gtk_scrolled_window_set_shadow_type ()
void gtk_scrolled_window_set_shadow_type (GtkScrolledWindow *scrolled_window
,GtkShadowType type
);
Changes the type of shadow drawn around the contents of
scrolled_window
.
gtk_scrolled_window_set_hadjustment ()
void gtk_scrolled_window_set_hadjustment (GtkScrolledWindow *scrolled_window
,GtkAdjustment *hadjustment
);
Sets the GtkAdjustment for the horizontal scrollbar.
gtk_scrolled_window_set_vadjustment ()
void gtk_scrolled_window_set_vadjustment (GtkScrolledWindow *scrolled_window
,GtkAdjustment *vadjustment
);
Sets the GtkAdjustment for the vertical scrollbar.
gtk_scrolled_window_get_placement ()
GtkCornerType
gtk_scrolled_window_get_placement (GtkScrolledWindow *scrolled_window
);
Gets the placement of the contents with respect to the scrollbars
for the scrolled window. See gtk_scrolled_window_set_placement()
.
Returns
the current placement value.
See also gtk_scrolled_window_set_placement()
and
gtk_scrolled_window_unset_placement()
.
gtk_scrolled_window_get_policy ()
void gtk_scrolled_window_get_policy (GtkScrolledWindow *scrolled_window
,GtkPolicyType *hscrollbar_policy
,GtkPolicyType *vscrollbar_policy
);
Retrieves the current policy values for the horizontal and vertical
scrollbars. See gtk_scrolled_window_set_policy()
.
gtk_scrolled_window_get_shadow_type ()
GtkShadowType
gtk_scrolled_window_get_shadow_type (GtkScrolledWindow *scrolled_window
);
Gets the shadow type of the scrolled window. See
gtk_scrolled_window_set_shadow_type()
.
gtk_scrolled_window_get_min_content_width ()
gint
gtk_scrolled_window_get_min_content_width
(GtkScrolledWindow *scrolled_window
);
Gets the minimum content width of scrolled_window
, or -1 if not set.
Since 3.0
gtk_scrolled_window_set_min_content_width ()
void gtk_scrolled_window_set_min_content_width (GtkScrolledWindow *scrolled_window
,gint width
);
Sets the minimum width that scrolled_window
should keep visible.
Note that this can and (usually will) be smaller than the minimum
size of the content.
Since 3.0
gtk_scrolled_window_get_min_content_height ()
gint
gtk_scrolled_window_get_min_content_height
(GtkScrolledWindow *scrolled_window
);
Gets the minimal content height of scrolled_window
, or -1 if not set.
Since 3.0
gtk_scrolled_window_set_min_content_height ()
void gtk_scrolled_window_set_min_content_height (GtkScrolledWindow *scrolled_window
,gint height
);
Sets the minimum height that scrolled_window
should keep visible.
Note that this can and (usually will) be smaller than the minimum
size of the content.
Since 3.0
gtk_scrolled_window_set_kinetic_scrolling ()
void gtk_scrolled_window_set_kinetic_scrolling (GtkScrolledWindow *scrolled_window
,gboolean kinetic_scrolling
);
Turns kinetic scrolling on or off.
Kinetic scrolling only applies to devices with source
GDK_SOURCE_TOUCHSCREEN
.
Since 3.4
gtk_scrolled_window_get_kinetic_scrolling ()
gboolean
gtk_scrolled_window_get_kinetic_scrolling
(GtkScrolledWindow *scrolled_window
);
Returns the specified kinetic scrolling behavior.
Since 3.4
gtk_scrolled_window_set_capture_button_press ()
void gtk_scrolled_window_set_capture_button_press (GtkScrolledWindow *scrolled_window
,gboolean capture_button_press
);
Changes the behaviour of scrolled_window
wrt. to the initial
event that possibly starts kinetic scrolling. When capture_button_press
is set to TRUE
, the event is captured by the scrolled window, and
then later replayed if it is meant to go to the child widget.
This should be enabled if any child widgets perform non-reversible
actions on “button-press-event”. If they don't, and handle
additionally handle “grab-broken-event”, it might be better
to set capture_button_press
to FALSE
.
This setting only has an effect if kinetic scrolling is enabled.
Since 3.4
gtk_scrolled_window_get_capture_button_press ()
gboolean
gtk_scrolled_window_get_capture_button_press
(GtkScrolledWindow *scrolled_window
);
Return whether button presses are captured during kinetic
scrolling. See gtk_scrolled_window_set_capture_button_press()
.
Since 3.4
Types and Values
struct GtkScrolledWindowClass
struct GtkScrolledWindowClass { GtkBinClass parent_class; gint scrollbar_spacing; /* Action signals for keybindings. Do not connect to these signals */ /* Unfortunately, GtkScrollType is deficient in that there is * no horizontal/vertical variants for GTK_SCROLL_START/END, * so we have to add an additional boolean flag. */ gboolean (*scroll_child) (GtkScrolledWindow *scrolled_window, GtkScrollType scroll, gboolean horizontal); void (* move_focus_out) (GtkScrolledWindow *scrolled_window, GtkDirectionType direction); };
Members
GtkBinClass |
The parent class. |
|
gint |
||
Keybinding signal which gets emitted when a keybinding that scrolls is pressed. |
||
Keybinding signal which gets emitted when focus is moved away from the scrolled window by a keybinding. |
enum GtkPolicyType
Determines how the size should be computed to achieve the one of the visibility mode for the scrollbars.
Members
The scrollbar is always visible. The view size is independent of the content. |
||
The scrollbar will appear and disappear as necessary. For example, when all of a GtkTreeView can not be seen. |
||
The scrollbar should never appear. In this mode the content determines the size. |
enum GtkCornerType
Specifies which corner a child widget should be placed in when packed into a GtkScrolledWindow. This is effectively the opposite of where the scroll bars are placed.
Property Details
The “hadjustment”
property
“hadjustment” GtkAdjustment *
The GtkAdjustment for the horizontal position.
Flags: Read / Write / Construct
The “hscrollbar-policy”
property
“hscrollbar-policy” GtkPolicyType
When the horizontal scrollbar is displayed.
Flags: Read / Write
Default value: GTK_POLICY_AUTOMATIC
The “kinetic-scrolling”
property
“kinetic-scrolling” gboolean
The kinetic scrolling behavior flags. Kinetic scrolling
only applies to devices with source GDK_SOURCE_TOUCHSCREEN
Flags: Read / Write
Default value: TRUE
Since 3.4
The “min-content-height”
property
“min-content-height” gint
The minimum content height of scrolled_window
, or -1 if not set.
Flags: Read / Write
Allowed values: >= -1
Default value: -1
Since 3.0
The “min-content-width”
property
“min-content-width” gint
The minimum content width of scrolled_window
, or -1 if not set.
Flags: Read / Write
Allowed values: >= -1
Default value: -1
Since 3.0
The “shadow-type”
property
“shadow-type” GtkShadowType
Style of bevel around the contents.
Flags: Read / Write
Default value: GTK_SHADOW_NONE
The “vadjustment”
property
“vadjustment” GtkAdjustment *
The GtkAdjustment for the vertical position.
Flags: Read / Write / Construct
The “vscrollbar-policy”
property
“vscrollbar-policy” GtkPolicyType
When the vertical scrollbar is displayed.
Flags: Read / Write
Default value: GTK_POLICY_AUTOMATIC
The “window-placement”
property
“window-placement” GtkCornerType
Where the contents are located with respect to the scrollbars.
Flags: Read / Write
Default value: GTK_CORNER_TOP_LEFT
The “window-placement-set”
property
“window-placement-set” gboolean
Whether "window-placement" should be used to determine the location of the contents with respect to the scrollbars.
GtkScrolledWindow:window-placement-set
has been deprecated since version 3.10 and should not be used in newly-written code.
This value is ignored and “window-placement” value is always honored.
Flags: Read / Write
Default value: TRUE
Since 2.10
Style Property Details
The “scrollbar-spacing”
style property
“scrollbar-spacing” gint
Number of pixels between the scrollbars and the scrolled window.
Flags: Read
Allowed values: >= 0
Default value: 3
The “scrollbars-within-bevel”
style property
“scrollbars-within-bevel” gboolean
Whether to place scrollbars within the scrolled window's bevel.
Flags: Read
Default value: FALSE
Since 2.12
Signal Details
The “move-focus-out”
signal
void user_function (GtkScrolledWindow *scrolled_window, GtkDirectionType direction_type, gpointer user_data)
The ::move-focus-out signal is a
keybinding signal which gets
emitted when focus is moved away from the scrolled window by a
keybinding. The “move-focus” signal is emitted with
direction_type
on this scrolled windows toplevel parent in the
container hierarchy. The default bindings for this signal are
Tab + Ctrl
and Tab + Ctrl + Shift
.
Parameters
scrolled_window |
||
direction_type |
either |
|
user_data |
user data set when the signal handler was connected. |
Flags: Action
The “scroll-child”
signal
gboolean user_function (GtkScrolledWindow *scrolled_window, GtkScrollType scroll, gboolean horizontal, gpointer user_data)
The ::scroll-child signal is a keybinding signal which gets emitted when a keybinding that scrolls is pressed. The horizontal or vertical adjustment is updated which triggers a signal that the scrolled windows child may listen to and scroll itself.
Parameters
scrolled_window |
||
scroll |
a GtkScrollType describing how much to scroll |
|
horizontal |
whether the keybinding scrolls the child horizontally or not |
|
user_data |
user data set when the signal handler was connected. |
Flags: Action