### Class

# Handy Clamp

since: 1.0

#### Description [src]

    final class Handy.Clamp : Gtk.Bin
      implements Atk.ImplementorIface, Gtk.Buildable, Gtk.Orientable {
      /* No available fields */
    }

A widget constraining its child to a given size.

The `HdyClamp` widget constrains the size of the widget it contains to a given maximum size. It will constrain the width if it is horizontal, or the height if it is vertical. The expansion of the child from its minimum to its maximum size is eased out for a smooth transition.

If the child requires more than the requested maximum size, it will be allocated the minimum size it can fit in instead.

## CSS nodes

`HdyClamp` has a single CSS node with name `clamp`.

The node will get the style classes `.large` when its child reached its maximum size, `.small` when the clamp allocates its full size to its child, `.medium` in-between, or none if it didn’t compute its size yet.

Available since: 1.0

#### Hierarchy

#### Ancestors

- GtkBin
- GtkContainer
- GtkWidget
- GInitiallyUnowned
- GObject

#### Implements

- AtkImplementorIface
- GtkBuildable
- GtkOrientable

#### Constructors

###### hdy_clamp_new

Creates a new `HdyClamp`.

since: 1.0

#### Instance methods

###### hdy_clamp_get_maximum_size

Gets the maximum size allocated to the children.

since: 1.0

###### hdy_clamp_get_tightening_threshold

Gets the size above which the children are clamped.

since: 1.0

###### hdy_clamp_set_maximum_size

Sets the maximum size allocated to the children.

since: 1.0

###### hdy_clamp_set_tightening_threshold

Sets the size above which the children are clamped.

since: 1.0

##### 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.

unstable since: 3.0

##### 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.

unstable since: 2.12

###### gtk_buildable_construct_child

Constructs a child of `buildable` with the name `name`.

unstable 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`.

unstable since: 2.12

###### gtk_buildable_custom_tag_end

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

unstable since: 2.12

###### gtk_buildable_custom_tag_start

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

unstable since: 2.12

###### gtk_buildable_get_internal_child

Get the internal child called `childname` of the `buildable` object.

unstable since: 2.12

###### gtk_buildable_get_name

Gets the name of the `buildable` object.

unstable 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.

unstable since: 2.12

###### gtk_buildable_set_buildable_property

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

unstable since: 2.12

###### gtk_buildable_set_name

Sets the name of the `buildable` object.

unstable since: 2.12

##### Methods inherited from GtkOrientable (2)

###### gtk_orientable_get_orientation

Retrieves the orientation of the `orientable`.

unstable since: 2.16

###### gtk_orientable_set_orientation

Sets the orientation of the `orientable`.

unstable since: 2.16

#### Properties

###### Handy.Clamp:maximum-size

The maximum size to allocate the children.

since: 1.0

###### Handy.Clamp:tightening-threshold

The size above which the child is clamped.

since: 1.0

##### Properties inherited from GtkContainer (3)

###### Gtk.Container:border-width

No description available.

unstable since: 3.0

###### Gtk.Container:child

No description available.

unstable since: 3.0

###### Gtk.Container:resize-mode

No description available.

unstable since: 3.0

##### Properties inherited from GtkWidget (39)

###### Gtk.Widget:app-paintable

No description available.

unstable since: 3.0

###### Gtk.Widget:can-default

No description available.

unstable since: 3.0

###### Gtk.Widget:can-focus

No description available.

unstable since: 3.0

###### Gtk.Widget:composite-child

No description available.

unstable since: 3.0

###### Gtk.Widget:double-buffered

Whether the widget is double buffered.

unstable deprecated: 3.14 since: 2.18

###### Gtk.Widget:events

No description available.

unstable since: 3.0

###### Gtk.Widget:expand

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

unstable since: 3.0

###### Gtk.Widget:focus-on-click

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

unstable since: 3.20

###### Gtk.Widget:halign

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

unstable since: 3.0

###### Gtk.Widget:has-default

No description available.

unstable since: 3.0

###### Gtk.Widget:has-focus

No description available.

unstable since: 3.0

###### 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.

unstable since: 2.12

###### Gtk.Widget:height-request

No description available.

unstable since: 3.0

###### Gtk.Widget:hexpand

Whether to expand horizontally. See gtk_widget_set_hexpand().

unstable since: 3.0

###### Gtk.Widget:hexpand-set

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

unstable since: 3.0

###### Gtk.Widget:is-focus

No description available.

unstable since: 3.0

###### Gtk.Widget:margin

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

unstable since: 3.0

###### Gtk.Widget:margin-bottom

Margin on bottom side of widget.

unstable 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.

unstable since: 3.12

###### Gtk.Widget:margin-left

Margin on left side of widget.

unstable deprecated: 3.12 since: 3.0

###### Gtk.Widget:margin-right

Margin on right side of widget.

unstable 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.

unstable since: 3.12

###### Gtk.Widget:margin-top

Margin on top side of widget.

unstable since: 3.0

###### Gtk.Widget:name

No description available.

unstable since: 3.0

###### Gtk.Widget:no-show-all

No description available.

unstable since: 3.0

###### Gtk.Widget:opacity

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

unstable since: 3.8

###### Gtk.Widget:parent

No description available.

unstable since: 3.0

###### Gtk.Widget:receives-default

No description available.

unstable since: 3.0

###### Gtk.Widget:scale-factor

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

unstable since: 3.10

###### Gtk.Widget:sensitive

No description available.

unstable since: 3.0

###### Gtk.Widget:style

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

unstable deprecated: Unknown since: 3.0

###### 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().

unstable since: 2.12

###### Gtk.Widget:tooltip-text

Sets the text of tooltip to be the given string.

unstable since: 2.12

###### Gtk.Widget:valign

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

unstable since: 3.0

###### Gtk.Widget:vexpand

Whether to expand vertically. See gtk_widget_set_vexpand().

unstable since: 3.0

###### Gtk.Widget:vexpand-set

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

unstable since: 3.0

###### Gtk.Widget:visible

No description available.

unstable since: 3.0

###### Gtk.Widget:width-request

No description available.

unstable since: 3.0

###### Gtk.Widget:window

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

unstable since: 2.14

##### Properties inherited from GtkOrientable (1)

###### Gtk.Orientable:orientation

The orientation of the orientable.

unstable since: 2.16

#### Signals

##### Signals inherited from GtkContainer (4)

###### GtkContainer::add

No description available.

unstable since: 3.0

###### GtkContainer::check-resize

No description available.

unstable since: 3.0

###### GtkContainer::remove

No description available.

unstable since: 3.0

###### GtkContainer::set-focus-child

No description available.

unstable since: 3.0

##### Signals inherited from GtkWidget (69)

###### GtkWidget::accel-closures-changed

No description available.

unstable since: 3.0

###### GtkWidget::button-press-event

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

unstable since: 3.0

###### GtkWidget::button-release-event

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

unstable since: 3.0

###### 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.

unstable since: 3.0

###### 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.

unstable since: 3.0

###### GtkWidget::composited-changed

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

unstable deprecated: 3.22 since: 3.0

###### GtkWidget::configure-event

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

unstable since: 3.0

###### 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.

unstable 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.

unstable since: 3.0

###### 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.

unstable since: 3.0

###### 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.

unstable since: 3.0

###### GtkWidget::direction-changed

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

unstable since: 3.0

###### 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().

unstable since: 3.0

###### 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.

unstable since: 3.0

###### 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().

unstable since: 3.0

###### 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.

unstable since: 3.0

###### 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.

unstable since: 3.0

###### 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`.

unstable since: 3.0

###### 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`.

unstable 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().

unstable since: 3.0

###### 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().

unstable since: 3.0

###### GtkWidget::draw

This signal is emitted when a widget is supposed to render itself. The `widget`‘s 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().

unstable since: 3.0

###### GtkWidget::enter-notify-event

The ::enter-notify-event will be emitted when the pointer enters the `widget`‘s window.

unstable since: 3.0

###### 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.

unstable since: 3.0

###### 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.

unstable since: 3.0

###### GtkWidget::focus

No description available.

unstable since: 3.0

###### GtkWidget::focus-in-event

The ::focus-in-event signal will be emitted when the keyboard focus enters the `widget`‘s window.

unstable since: 3.0

###### GtkWidget::focus-out-event

The ::focus-out-event signal will be emitted when the keyboard focus leaves the `widget`‘s window.

unstable since: 3.0

###### GtkWidget::grab-broken-event

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

unstable since: 2.8

###### GtkWidget::grab-focus

No description available.

unstable since: 3.0

###### 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.

unstable since: 3.0

###### GtkWidget::hide

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

unstable since: 3.0

###### 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.

unstable since: 3.0

###### 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.

unstable since: 3.0

###### GtkWidget::key-release-event

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

unstable since: 3.0

###### GtkWidget::keynav-failed

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

unstable since: 2.12

###### GtkWidget::leave-notify-event

The ::leave-notify-event will be emitted when the pointer leaves the `widget`‘s window.

unstable since: 3.0

###### 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.

unstable since: 3.0

###### GtkWidget::map-event

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

unstable since: 3.0

###### 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`.

unstable since: 3.0

###### GtkWidget::motion-notify-event

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

unstable since: 3.0

###### GtkWidget::move-focus

No description available.

unstable since: 3.0

###### GtkWidget::parent-set

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

unstable since: 3.0

###### 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.

unstable since: 3.0

###### GtkWidget::property-notify-event

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

unstable since: 3.0

###### GtkWidget::proximity-in-event

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

unstable since: 3.0

###### GtkWidget::proximity-out-event

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

unstable since: 3.0

###### 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.

unstable 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).

unstable since: 3.0

###### GtkWidget::screen-changed

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

unstable since: 3.0

###### 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.

unstable since: 3.0

###### GtkWidget::selection-clear-event

The ::selection-clear-event signal will be emitted when the the `widget`‘s window has lost ownership of a selection.

unstable since: 3.0

###### GtkWidget::selection-get

No description available.

unstable since: 3.0

###### GtkWidget::selection-notify-event

No description available.

unstable since: 3.0

###### GtkWidget::selection-received

No description available.

unstable since: 3.0

###### GtkWidget::selection-request-event

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

unstable since: 3.0

###### GtkWidget::show

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

unstable since: 3.0

###### GtkWidget::show-help

No description available.

unstable since: 3.0

###### GtkWidget::size-allocate

No description available.

unstable since: 3.0

###### GtkWidget::state-changed

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

unstable deprecated: 3.0 since: 3.0

###### GtkWidget::state-flags-changed

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

unstable 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.

unstable deprecated: 3.0 since: 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 `widget`‘s associated `GtkStyleContext` as returned by gtk_widget_get_style_context().

unstable since: 3.0

###### GtkWidget::touch-event

No description available.

unstable since: 3.0

###### 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.

unstable since: 3.0

###### GtkWidget::unmap-event

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

unstable since: 3.0

###### 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).

unstable since: 3.0

###### GtkWidget::visibility-notify-event

The ::visibility-notify-event will be emitted when the `widget`‘s window is obscured or unobscured.

unstable deprecated: 3.12 since: 3.0

###### GtkWidget::window-state-event

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

unstable since: 3.0

##### 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.

unstable since: 2.0

#### Class structure

    struct HandyClampClass {
      GtkBinClass parent_class;

    }

No description available.

###### Class members

`parent_class: GtkBinClass`
  No description available.