Class: Clutter::Backend

Inherits:

Object

• Object
• Clutter::Backend

Defined in:

(unknown)

Instance Method Summary

• #double_click_distance ⇒ Integer

  Retrieves the distance used to verify a double click event.

• #double_click_distance=(distance) ⇒ nil

  Sets the maximum distance used to verify a double click event.

• #double_click_time ⇒ Integer

  Gets the maximum time between two button press events, as set by clutter_backend_set_double_click_time().

• #double_click_time=(msec) ⇒ nil

  Sets the maximum time between two button press events, used to verify whether it's a double click event or not.

• #font_name ⇒ String

  Retrieves the default font name as set by clutter_backend_set_font_name().

• #font_name=(font_name) ⇒ nil

  Sets the default font to be used by Clutter.

• #font_options ⇒ cairo::FontOptions

  Retrieves the font options for backend.

• #font_options=(options) ⇒ nil

  Sets the new font options for backend.

• #resolution ⇒ Float

  Gets the resolution for font handling on the screen.

• #resolution=(dpi) ⇒ nil

  Sets the resolution for font handling on the screen.

Instance Method Details

#double_click_distance ⇒ Integer

Retrieves the distance used to verify a double click event

Returns:

• (Integer) —

  a distance, in pixels.

#double_click_distance=(distance) ⇒ nil

Sets the maximum distance used to verify a double click event.

Parameters:

• distance (Integer) —

  a distance, in pixels

Returns:

• (nil)

#double_click_time ⇒ Integer

Gets the maximum time between two button press events, as set
by clutter_backend_set_double_click_time().

Returns:

• (Integer) —

  a time in milliseconds

#double_click_time=(msec) ⇒ nil

Sets the maximum time between two button press events, used to
verify whether it's a double click event or not.

Parameters:

• msec (Integer) —

  milliseconds between two button press events

Returns:

• (nil)

#font_name ⇒ String

Retrieves the default font name as set by
clutter_backend_set_font_name().

Returns:

• (String) —

  the font name for the backend. The returned string is
  owned by the Clutter::Backend and should never be modified or freed

#font_name=(font_name) ⇒ nil

Sets the default font to be used by Clutter. The font_name string
must either be nil, which means that the font name from the
default Clutter::Backend will be used; or be something that can
be parsed by the pango_font_description_from_string() function.

Parameters:

• font_name (String) —

  the name of the font

Returns:

• (nil)

#font_options ⇒ cairo::FontOptions

Retrieves the font options for backend.

Returns:

• (cairo::FontOptions) —

  the font options of the Clutter::Backend.
  The returned #cairo_font_options_t is owned by the backend and should
  not be modified or freed

#font_options=(options) ⇒ nil

Sets the new font options for backend. The Clutter::Backend will
copy the #cairo_font_options_t.

If options is nil, the first following call to
clutter_backend_get_font_options() will return the default font
options for backend.

This function is intended for actors creating a Pango layout
using the PangoCairo API.

Parameters:

• options (cairo::FontOptions) —

  Cairo font options for the backend, or nil

Returns:

• (nil)

#resolution ⇒ Float

Gets the resolution for font handling on the screen.

The resolution is a scale factor between points specified in a
Pango::FontDescription and cairo units. The default value is 96.0,
meaning that a 10 point font will be 13 units
high (10 * 96. / 72. = 13.3).

Clutter will set the resolution using the current backend when
initializing; the resolution is also stored in the
Clutter::Settings:font-dpi property.

Returns:

• (Float) —

  the current resolution, or -1 if no resolution
  has been set.

#resolution=(dpi) ⇒ nil

Sets the resolution for font handling on the screen. This is a
scale factor between points specified in a Pango::FontDescription
and cairo units. The default value is 96, meaning that a 10 point
font will be 13 units high. (10 * 96. / 72. = 13.3).

Applications should never need to call this function.

Parameters:

• dpi (Float) —

  the resolution in "dots per inch" (Physical inches aren't
  actually involved; the terminology is conventional).

Returns:

• (nil)