Class

GtkViewport

Description [src]

class Gtk.Viewport : Gtk.Bin
  implements Atk.ImplementorIface, Gtk.Buildable, Gtk.Scrollable {
  /* No available fields */
}

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, such as GtkTextView, GtkTreeView or GtkIconView, it can be added to a GtkScrolledWindow with gtk_container_add(). If a widget does not, you must first add the widget to a GtkViewport, then add the viewport to the scrolled window. gtk_container_add() does this automatically if a child that does not implement GtkScrollable is added to a GtkScrolledWindow, so you can ignore the presence of the viewport.

The GtkViewport will start scrolling content only if allocated less than the child widget’s minimum size in a given orientation.

CSS nodes

GtkViewport has a single CSS node with name viewport.

Hierarchy

hierarchy this GtkViewport implements_0 AtkImplementorIface this--implements_0 implements_1 GtkBuildable this--implements_1 implements_2 GtkScrollable this--implements_2 ancestor_0 GtkBin ancestor_0--this ancestor_1 GtkContainer ancestor_1--ancestor_0 ancestor_2 GtkWidget ancestor_2--ancestor_1 ancestor_3 GInitiallyUnowned ancestor_3--ancestor_2 ancestor_4 GObject ancestor_4--ancestor_3

Constructors

gtk_viewport_new

Creates a new GtkViewport with the given adjustments, or with default adjustments if none are given.

Instance methods

gtk_viewport_get_bin_window

Gets the bin window of the GtkViewport.

since: 2.20

gtk_viewport_get_hadjustment

Returns the horizontal adjustment of the viewport.

deprecated: 3.0 

gtk_viewport_get_shadow_type

Gets the shadow type of the GtkViewport. See gtk_viewport_set_shadow_type().

gtk_viewport_get_vadjustment

Returns the vertical adjustment of the viewport.

deprecated: 3.0 

gtk_viewport_get_view_window

Gets the view window of the GtkViewport.

since: 2.22

gtk_viewport_set_hadjustment

Sets the horizontal adjustment of the viewport.

deprecated: 3.0 

gtk_viewport_set_shadow_type

Sets the shadow type of the viewport.

gtk_viewport_set_vadjustment

Sets the vertical adjustment of the viewport.

deprecated: 3.0 

Methods inherited from GtkBin (1)
gtk_bin_get_child

Gets the child of the GtkBin, or NULL if the bin contains no child widget. The returned widget does not have a reference added, so you do not need to unref it.

Methods inherited from GtkContainer (33)

Please see GtkContainer for a full list of methods.

Methods inherited from GtkWidget (263)

Please see GtkWidget for a full list of methods.

Methods inherited from GObject (43)

Please see GObject for a full list of methods.

Methods inherited from GtkBuildable (10)
gtk_buildable_add_child

Adds a child to buildable. type is an optional string describing how the child should be added.

since: 2.12

gtk_buildable_construct_child

Constructs a child of buildable with the name name.

since: 2.12

gtk_buildable_custom_finished

This is similar to gtk_buildable_parser_finished() but is called once for each custom tag handled by the buildable.

since: 2.12

gtk_buildable_custom_tag_end

This is called at the end of each custom element handled by the buildable.

since: 2.12

gtk_buildable_custom_tag_start

This is called for each unknown element under <child>.

since: 2.12

gtk_buildable_get_internal_child

Get the internal child called childname of the buildable object.

since: 2.12

gtk_buildable_get_name

Gets the name of the buildable object.

since: 2.12

gtk_buildable_parser_finished

Called when the builder finishes the parsing of a [GtkBuilder UI definition][BUILDER-UI]. Note that this will be called once for each time gtk_builder_add_from_file() or gtk_builder_add_from_string() is called on a builder.

since: 2.12

gtk_buildable_set_buildable_property

Sets the property name name to value on the buildable object.

since: 2.12

gtk_buildable_set_name

Sets the name of the buildable object.

since: 2.12

Methods inherited from GtkScrollable (9)
gtk_scrollable_get_border

Returns the size of a non-scrolling border around the outside of the scrollable. An example for this would be treeview headers. GTK+ can use this information to display overlayed graphics, like the overshoot indication, at the right position.

since: 3.16

gtk_scrollable_get_hadjustment

Retrieves the GtkAdjustment used for horizontal scrolling.

since: 3.0

gtk_scrollable_get_hscroll_policy

Gets the horizontal GtkScrollablePolicy.

since: 3.0

gtk_scrollable_get_vadjustment

Retrieves the GtkAdjustment used for vertical scrolling.

since: 3.0

gtk_scrollable_get_vscroll_policy

Gets the vertical GtkScrollablePolicy.

since: 3.0

gtk_scrollable_set_hadjustment

Sets the horizontal adjustment of the GtkScrollable.

since: 3.0

gtk_scrollable_set_hscroll_policy

Sets the GtkScrollablePolicy to determine whether horizontal scrolling should start below the minimum width or below the natural width.

since: 3.0

gtk_scrollable_set_vadjustment

Sets the vertical adjustment of the GtkScrollable.

since: 3.0

gtk_scrollable_set_vscroll_policy

Sets the GtkScrollablePolicy to determine whether vertical scrolling should start below the minimum height or below the natural height.

since: 3.0

Properties

Gtk.Viewport:shadow-type
No description available.

Properties inherited from GtkContainer (3)
Gtk.Container:border-width
No description available.

Gtk.Container:child
No description available.

Gtk.Container:resize-mode
No description available.

Properties inherited from GtkWidget (39)
Gtk.Widget:app-paintable
No description available.

Gtk.Widget:can-default
No description available.

Gtk.Widget:can-focus
No description available.

Gtk.Widget:composite-child
No description available.

Gtk.Widget:double-buffered

Whether the widget is double buffered.

deprecated: 3.14 since: 2.18

Gtk.Widget:events
No description available.

Gtk.Widget:expand

Whether to expand in both directions. Setting this sets both GtkWidget:hexpand and GtkWidget:vexpand.

since: 3.0

Gtk.Widget:focus-on-click

Whether the widget should grab focus when it is clicked with the mouse.

since: 3.20

Gtk.Widget:halign

How to distribute horizontal space if widget gets extra space, see GtkAlign.

since: 3.0

Gtk.Widget:has-default
No description available.

Gtk.Widget:has-focus
No description available.

Gtk.Widget:has-tooltip

Enables or disables the emission of GtkWidget::query-tooltip on widget. A value of TRUE indicates that widget can have a tooltip, in this case the widget will be queried using GtkWidget::query-tooltip to determine whether it will provide a tooltip or not.

since: 2.12

Gtk.Widget:height-request
No description available.

Gtk.Widget:hexpand

Whether to expand horizontally. See gtk_widget_set_hexpand().

since: 3.0

Gtk.Widget:hexpand-set

Whether to use the GtkWidget:hexpand property. See gtk_widget_get_hexpand_set().

since: 3.0

Gtk.Widget:is-focus
No description available.

Gtk.Widget:margin

Sets all four sides’ margin at once. If read, returns max margin on any side.

since: 3.0

Gtk.Widget:margin-bottom

Margin on bottom side of widget.

since: 3.0

Gtk.Widget:margin-end

Margin on end of widget, horizontally. This property supports left-to-right and right-to-left text directions.

since: 3.12

Gtk.Widget:margin-left

Margin on left side of widget.

deprecated: 3.12 since: 3.0

Gtk.Widget:margin-right

Margin on right side of widget.

deprecated: 3.12 since: 3.0

Gtk.Widget:margin-start

Margin on start of widget, horizontally. This property supports left-to-right and right-to-left text directions.

since: 3.12

Gtk.Widget:margin-top

Margin on top side of widget.

since: 3.0

Gtk.Widget:name
No description available.

Gtk.Widget:no-show-all
No description available.

Gtk.Widget:opacity

The requested opacity of the widget. See gtk_widget_set_opacity() for more details about window opacity.

since: 3.8

Gtk.Widget:parent
No description available.

Gtk.Widget:receives-default
No description available.

Gtk.Widget:scale-factor

The scale factor of the widget. See gtk_widget_get_scale_factor() for more details about widget scaling.

since: 3.10

Gtk.Widget:sensitive
No description available.

Gtk.Widget:style

The style of the widget, which contains information about how it will look (colors, etc).

deprecated: Unknown 

Gtk.Widget:tooltip-markup

Sets the text of tooltip to be the given string, which is marked up with the [Pango text markup language][PangoMarkupFormat]. Also see gtk_tooltip_set_markup().

since: 2.12

Gtk.Widget:tooltip-text

Sets the text of tooltip to be the given string.

since: 2.12

Gtk.Widget:valign

How to distribute vertical space if widget gets extra space, see GtkAlign.

since: 3.0

Gtk.Widget:vexpand

Whether to expand vertically. See gtk_widget_set_vexpand().

since: 3.0

Gtk.Widget:vexpand-set

Whether to use the GtkWidget:vexpand property. See gtk_widget_get_vexpand_set().

since: 3.0

Gtk.Widget:visible
No description available.

Gtk.Widget:width-request
No description available.

Gtk.Widget:window

The widget’s window if it is realized, NULL otherwise.

since: 2.14

Properties inherited from GtkScrollable (4)
GtkScrollable:hadjustment

Horizontal GtkAdjustment of the scrollable widget. This adjustment is shared between the scrollable widget and its parent.

since: 3.0

GtkScrollable:hscroll-policy

Determines whether horizontal scrolling should start once the scrollable widget is allocated less than its minimum width or less than its natural width.

since: 3.0

GtkScrollable:vadjustment

Verical GtkAdjustment of the scrollable widget. This adjustment is shared between the scrollable widget and its parent.

since: 3.0

GtkScrollable:vscroll-policy

Determines whether vertical scrolling should start once the scrollable widget is allocated less than its minimum height or less than its natural height.

since: 3.0

Signals

Signals inherited from GtkContainer (4)
GtkContainer::add
No description available.

GtkContainer::check-resize
No description available.

GtkContainer::remove
No description available.

GtkContainer::set-focus-child
No description available.

Signals inherited from GtkWidget (69)
GtkWidget::accel-closures-changed
No description available.

GtkWidget::button-press-event

The ::button-press-event signal will be emitted when a button (typically from a mouse) is pressed.

GtkWidget::button-release-event

The ::button-release-event signal will be emitted when a button (typically from a mouse) is released.

GtkWidget::can-activate-accel

Determines whether an accelerator that activates the signal identified by signal_id can currently be activated. This signal is present to allow applications and derived widgets to override the default GtkWidget handling for determining whether an accelerator can be activated.

GtkWidget::child-notify

The ::child-notify signal is emitted for each [child property][child-properties] that has changed on an object. The signal’s detail holds the property name.

GtkWidget::composited-changed

The ::composited-changed signal is emitted when the composited status of widgets screen changes. See gdk_screen_is_composited().

deprecated: 3.22 

GtkWidget::configure-event

The ::configure-event signal will be emitted when the size, position or stacking of the widgets window has changed.

GtkWidget::damage-event

Emitted when a redirected window belonging to widget gets drawn into. The region/area members of the event shows what area of the redirected drawable was drawn into.

since: 2.14

GtkWidget::delete-event

The ::delete-event signal is emitted if a user requests that a toplevel window is closed. The default handler for this signal destroys the window. Connecting gtk_widget_hide_on_delete() to this signal will cause the window to be hidden instead, so that it can later be shown again without reconstructing it.

GtkWidget::destroy

Signals that all holders of a reference to the widget should release the reference that they hold. May result in finalization of the widget if all references are released.

GtkWidget::destroy-event

The ::destroy-event signal is emitted when a GdkWindow is destroyed. You rarely get this signal, because most widgets disconnect themselves from their window before they destroy it, so no widget owns the window at destroy time.

GtkWidget::direction-changed

The ::direction-changed signal is emitted when the text direction of a widget changes.

GtkWidget::drag-begin

The ::drag-begin signal is emitted on the drag source when a drag is started. A typical reason to connect to this signal is to set up a custom drag icon with e.g. gtk_drag_source_set_icon_pixbuf().

GtkWidget::drag-data-delete

The ::drag-data-delete signal is emitted on the drag source when a drag with the action GDK_ACTION_MOVE is successfully completed. The signal handler is responsible for deleting the data that has been dropped. What “delete” means depends on the context of the drag operation.

GtkWidget::drag-data-get

The ::drag-data-get signal is emitted on the drag source when the drop site requests the data which is dragged. It is the responsibility of the signal handler to fill data with the data in the format which is indicated by info. See gtk_selection_data_set() and gtk_selection_data_set_text().

GtkWidget::drag-data-received

The ::drag-data-received signal is emitted on the drop site when the dragged data has been received. If the data was received in order to determine whether the drop will be accepted, the handler is expected to call gdk_drag_status() and not finish the drag. If the data was received in response to a GtkWidget::drag-drop signal (and this is the last target to be received), the handler for this signal is expected to process the received data and then call gtk_drag_finish(), setting the success parameter depending on whether the data was processed successfully.

GtkWidget::drag-drop

The ::drag-drop signal is emitted on the drop site when the user drops the data onto the widget. The signal handler must determine whether the cursor position is in a drop zone or not. If it is not in a drop zone, it returns FALSE and no further processing is necessary. Otherwise, the handler returns TRUE. In this case, the handler must ensure that gtk_drag_finish() is called to let the source know that the drop is done. The call to gtk_drag_finish() can be done either directly or in a GtkWidget::drag-data-received handler which gets triggered by calling gtk_drag_get_data() to receive the data for one or more of the supported targets.

GtkWidget::drag-end

The ::drag-end signal is emitted on the drag source when a drag is finished. A typical reason to connect to this signal is to undo things done in GtkWidget::drag-begin.

GtkWidget::drag-failed

The ::drag-failed signal is emitted on the drag source when a drag has failed. The signal handler may hook custom code to handle a failed DnD operation based on the type of error, it returns TRUE is the failure has been already handled (not showing the default “drag operation failed” animation), otherwise it returns FALSE.

since: 2.12

GtkWidget::drag-leave

The ::drag-leave signal is emitted on the drop site when the cursor leaves the widget. A typical reason to connect to this signal is to undo things done in GtkWidget::drag-motion, e.g. undo highlighting with gtk_drag_unhighlight().

GtkWidget::drag-motion

The ::drag-motion signal is emitted on the drop site when the user moves the cursor over the widget during a drag. The signal handler must determine whether the cursor position is in a drop zone or not. If it is not in a drop zone, it returns FALSE and no further processing is necessary. Otherwise, the handler returns TRUE. In this case, the handler is responsible for providing the necessary information for displaying feedback to the user, by calling gdk_drag_status().

GtkWidget::draw

This signal is emitted when a widget is supposed to render itself. The widgets top left corner must be painted at the origin of the passed in context and be sized to the values returned by gtk_widget_get_allocated_width() and gtk_widget_get_allocated_height().

since: 3.0

GtkWidget::enter-notify-event

The ::enter-notify-event will be emitted when the pointer enters the widgets window.

GtkWidget::event

The GTK+ main loop will emit three signals for each GDK event delivered to a widget: one generic ::event signal, another, more specific, signal that matches the type of event delivered (e.g. GtkWidget::key-press-event) and finally a generic GtkWidget::event-after signal.

GtkWidget::event-after

After the emission of the GtkWidget::event signal and (optionally) the second more specific signal, ::event-after will be emitted regardless of the previous two signals handlers return values.

GtkWidget::focus
No description available.

GtkWidget::focus-in-event

The ::focus-in-event signal will be emitted when the keyboard focus enters the widgets window.

GtkWidget::focus-out-event

The ::focus-out-event signal will be emitted when the keyboard focus leaves the widgets window.

GtkWidget::grab-broken-event

Emitted when a pointer or keyboard grab on a window belonging to widget gets broken.

since: 2.8

GtkWidget::grab-focus
No description available.

GtkWidget::grab-notify

The ::grab-notify signal is emitted when a widget becomes shadowed by a GTK+ grab (not a pointer or keyboard grab) on another widget, or when it becomes unshadowed due to a grab being removed.

GtkWidget::hide

The ::hide signal is emitted when widget is hidden, for example with gtk_widget_hide().

GtkWidget::hierarchy-changed

The ::hierarchy-changed signal is emitted when the anchored state of a widget changes. A widget is “anchored” when its toplevel ancestor is a GtkWindow. This signal is emitted when a widget changes from un-anchored to anchored or vice-versa.

GtkWidget::key-press-event

The ::key-press-event signal is emitted when a key is pressed. The signal emission will reoccur at the key-repeat rate when the key is kept pressed.

GtkWidget::key-release-event

The ::key-release-event signal is emitted when a key is released.

GtkWidget::keynav-failed

Gets emitted if keyboard navigation fails. See gtk_widget_keynav_failed() for details.

since: 2.12

GtkWidget::leave-notify-event

The ::leave-notify-event will be emitted when the pointer leaves the widgets window.

GtkWidget::map

The ::map signal is emitted when widget is going to be mapped, that is when the widget is visible (which is controlled with gtk_widget_set_visible()) and all its parents up to the toplevel widget are also visible. Once the map has occurred, GtkWidget::map-event will be emitted.

GtkWidget::map-event

The ::map-event signal will be emitted when the widgets window is mapped. A window is mapped when it becomes visible on the screen.

GtkWidget::mnemonic-activate

The default handler for this signal activates widget if group_cycling is FALSE, or just makes widget grab focus if group_cycling is TRUE.

GtkWidget::motion-notify-event

The ::motion-notify-event signal is emitted when the pointer moves over the widget’s GdkWindow.

GtkWidget::move-focus
No description available.

GtkWidget::parent-set

The ::parent-set signal is emitted when a new parent has been set on a widget.

GtkWidget::popup-menu

This signal gets emitted whenever a widget should pop up a context menu. This usually happens through the standard key binding mechanism; by pressing a certain key while a widget is focused, the user can cause the widget to pop up a menu. For example, the GtkEntry widget creates a menu with clipboard commands. See the [Popup Menu Migration Checklist][checklist-popup-menu] for an example of how to use this signal.

GtkWidget::property-notify-event

The ::property-notify-event signal will be emitted when a property on the widgets window has been changed or deleted.

GtkWidget::proximity-in-event

To receive this signal the GdkWindow associated to the widget needs to enable the #GDK_PROXIMITY_IN_MASK mask.

GtkWidget::proximity-out-event

To receive this signal the GdkWindow associated to the widget needs to enable the #GDK_PROXIMITY_OUT_MASK mask.

GtkWidget::query-tooltip

Emitted when GtkWidget:has-tooltip is TRUE and the hover timeout has expired with the cursor hovering “above” widget; or emitted when widget got focus in keyboard mode.

since: 2.12

GtkWidget::realize

The ::realize signal is emitted when widget is associated with a GdkWindow, which means that gtk_widget_realize() has been called or the widget has been mapped (that is, it is going to be drawn).

GtkWidget::screen-changed

The ::screen-changed signal gets emitted when the screen of a widget has changed.

GtkWidget::scroll-event

The ::scroll-event signal is emitted when a button in the 4 to 7 range is pressed. Wheel mice are usually configured to generate button press events for buttons 4 and 5 when the wheel is turned.

GtkWidget::selection-clear-event

The ::selection-clear-event signal will be emitted when the the widgets window has lost ownership of a selection.

GtkWidget::selection-get
No description available.

GtkWidget::selection-notify-event
No description available.

GtkWidget::selection-received
No description available.

GtkWidget::selection-request-event

The ::selection-request-event signal will be emitted when another client requests ownership of the selection owned by the widgets window.

GtkWidget::show

The ::show signal is emitted when widget is shown, for example with gtk_widget_show().

GtkWidget::show-help
No description available.

GtkWidget::size-allocate
No description available.

GtkWidget::state-changed

The ::state-changed signal is emitted when the widget state changes. See gtk_widget_get_state().

deprecated: 3.0 

GtkWidget::state-flags-changed

The ::state-flags-changed signal is emitted when the widget state changes, see gtk_widget_get_state_flags().

since: 3.0

GtkWidget::style-set

The ::style-set signal is emitted when a new style has been set on a widget. Note that style-modifying functions like gtk_widget_modify_base() also cause this signal to be emitted.

deprecated: 3.0 

GtkWidget::style-updated

The ::style-updated signal is a convenience signal that is emitted when the GtkStyleContext::changed signal is emitted on the widgets associated GtkStyleContext as returned by gtk_widget_get_style_context().

since: 3.0

GtkWidget::touch-event
No description available.

GtkWidget::unmap

The ::unmap signal is emitted when widget is going to be unmapped, which means that either it or any of its parents up to the toplevel widget have been set as hidden.

GtkWidget::unmap-event

The ::unmap-event signal will be emitted when the widgets window is unmapped. A window is unmapped when it becomes invisible on the screen.

GtkWidget::unrealize

The ::unrealize signal is emitted when the GdkWindow associated with widget is destroyed, which means that gtk_widget_unrealize() has been called or the widget has been unmapped (that is, it is going to be hidden).

GtkWidget::visibility-notify-event

The ::visibility-notify-event will be emitted when the widgets window is obscured or unobscured.

deprecated: 3.12 

GtkWidget::window-state-event

The ::window-state-event will be emitted when the state of the toplevel window associated to the widget changes.

Signals inherited from GObject (1)
GObject::notify

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.

Class structure

struct GtkViewportClass {
  GtkBinClass parent_class;
  void (* _gtk_reserved1) (
void
  );
  void (* _gtk_reserved2) (
void
  );
  void (* _gtk_reserved3) (
void
  );
  void (* _gtk_reserved4) (
void
  );
  
}

No description available.

Class members
parent_class: GtkBinClass

The parent class.

_gtk_reserved1: void (* _gtk_reserved1) ( void )

No description available.

_gtk_reserved2: void (* _gtk_reserved2) ( void )

No description available.

_gtk_reserved3: void (* _gtk_reserved3) ( void )

No description available.

_gtk_reserved4: void (* _gtk_reserved4) ( void )

No description available.