### Class

# GtkSource GutterRenderer

#### Description [src]

    abstract class GtkSource.GutterRenderer : Gtk.Widget
      implements Gtk.Accessible, Gtk.Buildable, Gtk.ConstraintTarget {
      /* No available fields */
    }

Gutter cell renderer.

A `GtkSourceGutterRenderer` represents a column in a `GtkSourceGutter`. The column contains one cell for each visible line of the `GtkTextBuffer`. Due to text wrapping, a cell can thus span multiple lines of the `GtkTextView`. In this case, `GtkSourceGutterRendererAlignmentMode` controls the alignment of the cell.

The gutter renderer is a `GtkWidget` and is measured using the normal widget measurement facilities. The width of the gutter will be determined by the measurements of the gutter renderers.

The width of a gutter renderer generally takes into account the entire text buffer. For instance, to display the line numbers, if the buffer contains 100 lines, the gutter renderer will always set its width such as three digits can be printed, even if only the first 20 lines are shown. Another strategy is to take into account only the visible lines. In this case, only two digits are necessary to display the line numbers of the first 20 lines. To take another example, the gutter renderer for `GtkSourceMark`s doesn’t need to take into account the text buffer to announce its width. It only depends on the icons size displayed in the gutter column.

When the available size to render a cell is greater than the required size to render the cell contents, the cell contents can be aligned horizontally and vertically with `gtk_source_gutter_renderer_set_alignment_mode()`.

The cells rendering occurs using `Gtk.WidgetClass.snapshot`. Implementations should use `gtk_source_gutter_renderer_get_lines()` to retrieve information about the lines to be rendered. To help with aligning content which takes into account the padding and alignment of a cell, implementations may call `gtk_source_gutter_renderer_align_cell()` for a given line number with the width and height measurement of the content they width to render.

#### Ancestors

- GtkWidget
- GInitiallyUnowned
- GObject

#### Descendants

- GtkSourceGutterRendererPixbuf
- GtkSourceGutterRendererText

#### Implements

- GtkAccessible
- GtkBuildable
- GtkConstraintTarget

#### Instance methods

###### gtk_source_gutter_renderer_activate

Emits the `GtkSourceGutterRenderer::activate` signal of the renderer. This is called from `GtkSourceGutter` and should never have to be called manually.

###### gtk_source_gutter_renderer_align_cell

Locates where to render content that is `width` x `height` based on the renderers alignment and padding.

###### gtk_source_gutter_renderer_get_alignment_mode

Get the alignment mode.

###### gtk_source_gutter_renderer_get_buffer

Gets the `GtkSourceBuffer` for which the gutter renderer is drawing.

###### gtk_source_gutter_renderer_get_view

Get the view associated to the gutter renderer.

###### gtk_source_gutter_renderer_get_xalign

Gets the `xalign` property.

###### gtk_source_gutter_renderer_get_xpad

Gets the `xpad` property.

###### gtk_source_gutter_renderer_get_yalign

Gets the `yalign` property.

###### gtk_source_gutter_renderer_get_ypad

Gets the `ypad` property.

###### gtk_source_gutter_renderer_query_activatable

Get whether the renderer is activatable at the location provided. This is called from `GtkSourceGutter` to determine whether a renderer is activatable using the mouse pointer.

###### gtk_source_gutter_renderer_set_alignment_mode

Set the alignment mode. The alignment mode describes the manner in which the renderer is aligned (see `GtkSourceGutterRenderer:xalign` and `GtkSourceGutterRenderer:yalign`).

###### gtk_source_gutter_renderer_set_xalign

Adjusts the `xalign` property.

###### gtk_source_gutter_renderer_set_xpad

Adjusts the `xpad` property.

###### gtk_source_gutter_renderer_set_yalign

Adjusts the `yalign` property.

###### gtk_source_gutter_renderer_set_ypad

Adjusts the `ypad` property.

##### Methods inherited from GtkWidget (164)

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 GtkAccessible (20)

###### gtk_accessible_announce

Requests the user’s screen reader to announce the given message.

###### gtk_accessible_get_accessible_parent

Retrieves the accessible parent for an accessible object.

###### gtk_accessible_get_accessible_role

Retrieves the accessible role of an accessible object.

###### gtk_accessible_get_at_context

Retrieves the implementation for the given accessible object.

###### gtk_accessible_get_bounds

Queries the coordinates and dimensions of this accessible.

###### gtk_accessible_get_first_accessible_child

Retrieves the first accessible child of an accessible object.

###### gtk_accessible_get_next_accessible_sibling

Retrieves the next accessible sibling of an accessible object.

###### gtk_accessible_get_platform_state

Queries a platform state, such as focus.

###### gtk_accessible_reset_property

Resets the accessible property to its default value.

###### gtk_accessible_reset_relation

Resets the accessible relation to its default value.

###### gtk_accessible_reset_state

Resets the accessible state to its default value.

###### gtk_accessible_set_accessible_parent

Sets the parent and sibling of an accessible object.

###### gtk_accessible_update_next_accessible_sibling

Updates the next accessible sibling.

###### gtk_accessible_update_platform_state

Informs ATs that the platform state has changed.

###### gtk_accessible_update_property

Updates a list of accessible properties.

###### gtk_accessible_update_property_value

Updates an array of accessible properties.

###### gtk_accessible_update_relation

Updates a list of accessible relations.

###### gtk_accessible_update_relation_value

Updates an array of accessible relations.

###### gtk_accessible_update_state

Updates a list of accessible states.

###### gtk_accessible_update_state_value

Updates an array of accessible states.

##### Methods inherited from GtkBuildable (1)

###### gtk_buildable_get_buildable_id

Gets the ID of the `buildable` object.

#### Properties

###### GtkSource.GutterRenderer:alignment-mode

The alignment mode of the renderer.

###### GtkSource.GutterRenderer:lines

Contains information about the lines to be rendered.

###### GtkSource.GutterRenderer:view

The view on which the renderer is placed.

###### GtkSource.GutterRenderer:xalign

The horizontal alignment of the renderer.

###### GtkSource.GutterRenderer:xpad

The left and right padding of the renderer.

###### GtkSource.GutterRenderer:yalign

The vertical alignment of the renderer.

###### GtkSource.GutterRenderer:ypad

The top and bottom padding of the renderer.

##### Properties inherited from GtkWidget (35)

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

Whether the widget or any of its descendents can accept the input focus.

###### Gtk.Widget:can-target

Whether the widget can receive pointer events.

###### Gtk.Widget:css-classes

A list of css classes applied to this widget.

###### Gtk.Widget:css-name

The name of this widget in the CSS tree.

###### Gtk.Widget:cursor

The cursor used by `widget`.

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

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

###### Gtk.Widget:focusable

Whether this widget itself will accept the input focus.

###### Gtk.Widget:halign

How to distribute horizontal space if widget gets extra space.

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

Whether the widget is the default widget.

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

Whether the widget has the input focus.

###### Gtk.Widget:has-tooltip

Enables or disables the emission of the `GtkWidget::query-tooltip` signal on `widget`.

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

Overrides for height request of the widget.

###### Gtk.Widget:hexpand

Whether to expand horizontally.

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

Whether to use the `hexpand` property.

###### Gtk.Widget:layout-manager

The `GtkLayoutManager` instance to use to compute the preferred size of the widget, and allocate its children.

###### Gtk.Widget:limit-events

Makes this widget act like a modal dialog, with respect to event delivery.

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

Margin on bottom side of widget.

###### Gtk.Widget:margin-end

Margin on end of widget, horizontally.

###### Gtk.Widget:margin-start

Margin on start of widget, horizontally.

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

Margin on top side of widget.

###### Gtk.Widget:name

The name of the widget.

###### Gtk.Widget:opacity

The requested opacity of the widget.

###### Gtk.Widget:overflow

How content outside the widget’s content area is treated.

###### Gtk.Widget:parent

The parent widget of this widget.

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

Whether the widget will receive the default action when it is focused.

###### Gtk.Widget:root

The `GtkRoot` widget of the widget tree containing this widget.

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

The scale factor of the widget.

###### Gtk.Widget:sensitive

Whether the widget responds to input.

###### Gtk.Widget:tooltip-markup

Sets the text of tooltip to be the given string, which is marked up with Pango markup.

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

Sets the text of tooltip to be the given string.

###### Gtk.Widget:valign

How to distribute vertical space if widget gets extra space.

###### Gtk.Widget:vexpand

Whether to expand vertically.

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

Whether to use the `vexpand` property.

###### Gtk.Widget:visible

Whether the widget is visible.

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

Overrides for width request of the widget.

##### Properties inherited from GtkAccessible (1)

###### Gtk.Accessible:accessible-role

The accessible role of the given `GtkAccessible` implementation.

#### Signals

###### GtkSource.GutterRenderer::activate

The signal is emitted when the renderer is activated.

###### GtkSource.GutterRenderer::query-activatable

The signal is emitted when the renderer can possibly be activated.

###### GtkSource.GutterRenderer::query-data

No description available.

##### Signals inherited from GtkWidget (13)

###### GtkWidget::destroy

Signals that all holders of a reference to the widget should release the reference that they hold.

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

Emitted when the text direction of a widget changes.

###### GtkWidget::hide

Emitted when `widget` is hidden.

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

Emitted if keyboard navigation fails.

###### GtkWidget::map

Emitted when `widget` is going to be mapped.

###### GtkWidget::mnemonic-activate

Emitted when a widget is activated via a mnemonic.

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

Emitted when the focus is moved.

###### GtkWidget::query-tooltip

Emitted when the widget’s tooltip is about to be shown.

###### GtkWidget::realize

Emitted when `widget` is associated with a `GdkSurface`.

###### GtkWidget::show

Emitted when `widget` is shown.

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

Emitted when the widget state changes.

###### GtkWidget::unmap

Emitted when `widget` is going to be unmapped.

###### GtkWidget::unrealize

Emitted when the `GdkSurface` associated with `widget` is destroyed.

##### 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 GtkSourceGutterRendererClass {
      GtkWidgetClass parent_class;
      void (* query_data) (
        GtkSourceGutterRenderer* renderer,
        GtkSourceGutterLines* lines,
        guint line
      );
      void (* begin) (
        GtkSourceGutterRenderer* renderer,
        GtkSourceGutterLines* lines
      );
      void (* snapshot_line) (
        GtkSourceGutterRenderer* renderer,
        GtkSnapshot* snapshot,
        GtkSourceGutterLines* lines,
        guint line
      );
      void (* end) (
        GtkSourceGutterRenderer* renderer
      );
      void (* change_view) (
        GtkSourceGutterRenderer* renderer,
        GtkSourceView* old_view
      );
      void (* change_buffer) (
        GtkSourceGutterRenderer* renderer,
        GtkSourceBuffer* old_buffer
      );
      gboolean (* query_activatable) (
        GtkSourceGutterRenderer* renderer,
        GtkTextIter* iter,
        GdkRectangle* area
      );
      void (* activate) (
        GtkSourceGutterRenderer* renderer,
        GtkTextIter* iter,
        GdkRectangle* area,
        guint button,
        GdkModifierType state,
        gint n_presses
      );

    }

No description available.

###### Class members

`parent_class: GtkWidgetClass`

  No description available.

`query_data: void (* query_data) ( GtkSourceGutterRenderer* renderer, GtkSourceGutterLines* lines, guint line )`

  No description available.

`begin: void (* begin) ( GtkSourceGutterRenderer* renderer, GtkSourceGutterLines* lines )`

  No description available.

`snapshot_line: void (* snapshot_line) ( GtkSourceGutterRenderer* renderer, GtkSnapshot* snapshot, GtkSourceGutterLines* lines, guint line )`

  No description available.

`end: void (* end) ( GtkSourceGutterRenderer* renderer )`

  No description available.

`change_view: void (* change_view) ( GtkSourceGutterRenderer* renderer, GtkSourceView* old_view )`

  No description available.

`change_buffer: void (* change_buffer) ( GtkSourceGutterRenderer* renderer, GtkSourceBuffer* old_buffer )`

  No description available.

`query_activatable: gboolean (* query_activatable) ( GtkSourceGutterRenderer* renderer, GtkTextIter* iter, GdkRectangle* area )`

  No description available.

`activate: void (* activate) ( GtkSourceGutterRenderer* renderer, GtkTextIter* iter, GdkRectangle* area, guint button, GdkModifierType state, gint n_presses )`

  No description available.

#### Virtual methods

###### GtkSource.GutterRendererClass.activate

Emits the `GtkSourceGutterRenderer::activate` signal of the renderer. This is called from `GtkSourceGutter` and should never have to be called manually.

###### GtkSource.GutterRendererClass.begin

No description available.

###### GtkSource.GutterRendererClass.change_buffer

This is called when the text buffer changes for `renderer`.

###### GtkSource.GutterRendererClass.change_view

This is called when the text view changes for `renderer`.

###### GtkSource.GutterRendererClass.end

No description available.

###### GtkSource.GutterRendererClass.query_activatable

Get whether the renderer is activatable at the location provided. This is called from `GtkSourceGutter` to determine whether a renderer is activatable using the mouse pointer.

###### GtkSource.GutterRendererClass.query_data

No description available.

###### GtkSource.GutterRendererClass.snapshot_line

No description available.