ruby-****@sourc*****
ruby-****@sourc*****
2005年 10月 6日 (木) 00:58:09 JST
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URL = /hiki.cgi?Cairo%3A%3AContext
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TITLE = Cairo::Context
KEYWORD =
= class Cairo::Context
There are only GDK and Pango related APIs.
== Object Hierarchy
* Object
* Cairo::Context
== Instance Methods
=== GDK related APIs
--- rectangle(rectangle)
((*Ruby/GTK*))
Adds the given rectangle to the current path of self.
* rectangle: Gdk::Rectangle
* Returns: self
--- region(region)
((*Ruby/GTK*))
Adds the given region to the current path of self.
* region: Gdk::Region
* Returns: self
--- set_source_color(color)
((*Ruby/GTK*))
Sets the specified Gdk::Color as the source color of self.
* color: Gdk::Color
* Returns: self
--- set_source_pixbuf(pixbuf, pixbuf_x, pixbuf_y)
((*Ruby/GTK*))
Sets the given pixbuf as the source pattern for the
Cairo context. The pattern has an extend mode of
Cairo::EXTEND_NONE and is aligned so that the origin of
((|pixbuf|)) is ((|pixbuf_x|)), ((|pixbuf_y|))
* pixbuf: Gdk::Pixbuf
* pixbuf_x: X coordinate of location to place upper
left corner of ((|pixbuf|))
* pixbuf_y: Y coordinate of location to place upper
left corner of ((|pixbuf|))
* Returns: self
=== Pango related APIs
--- create_layout
((*Ruby/Pango*))
Creates a layout object set up to match the
current transformation and target surface of the Cairo
context. This layout can then be used for text
measurement with functions like Pango::Layout#size
or drawing with functions like
Cairo::Context#show_layout. If you change the
transformation or target surface for self, you need to
call Cairo::Context#update_layout.
This function is the most convenient way to use Cairo with
Pango, however it is slightly inefficient since it
creates a separate Pango::Context object for each
layout. This might matter in an application that was
laying out large amounts of text.
* Returns: the newly created Pango::Layout
--- glyph_string_path(font, glyphs)
((*Ruby/Pango*))
Adds the glyphs in ((|glyphs|)) to the current path in self.
The origin of the glyphs (the left
edge of the baseline) will be at the current point of self.
* font: a Pango::Font
* glyphs: a Pango::GlyphString
* Returns: self
--- layout_path(layout)
((*Ruby/Pango*))
Adds the text in a Pango::LayoutLine to the current
path in self. The top-left corner of the Pango::Layout
will be at the current point of self.
* layout: a Pango::Layout
* Returns: self
--- layout_line_path(line)
((*Ruby/Pango*))
Adds the text in Pango::LayoutLine to the current path
in self. The origin of the glyphs (the left edge of the
line) will be at the current point of self.
* line: a Pango::LayoutLine
* Returns: self
--- show_glyph_string(font, glyphs)
((*Ruby/Pango*))
Draws the glyphs in ((|glyphs|)) in self.
The origin of the glyphs (the left edge of the
baseline) will be drawn at the current point of self.
* font: Pango::Font
* glyphs: Pango::GlyphString
* Returns: self
--- show_layout(layout)
((*Ruby/Pango*))
Draws a Pango::LayoutLine in self. The
top-left corner of the Pango::Layout will be drawn at
the current point of self.
* layout: a Pango layout
* Returns: self
--- show_layout_line(line)
((*Ruby/Pango*))
Draws a Pango::LayoutLine in self. The
origin of the glyphs (the left edge of the line) will be
drawn at the current point of self.
* line: a Pango::LayoutLine
* Returns: self
--- update_context(context);
((*Ruby/Pango*))
Updates a Pango::Context previously created for use
with Cairo to match the current transformation and
target surface of a Cairo context. If any layouts have
been created for the context, it's necessary to call
Pango::Layout#context_changed on those layouts.
* context: a Pango::Context, from
Pango::CairoFontMap#create_context
* Returns: self
--- update_layout(layout)
((*Ruby/Pango*))
Updates the private Pango::Context of a Pango::Layout
created with Cairo::Context#create_layout to match the
current transformation and target surface of a Cairo
context.
* layout: a Pango::Layout, from
Cairo::Context#create_layout
* Returns: self
== See Also
* Gdk::Drawable#create_cairo_context
* Pango::Context
* Pango::CairoFontMap
== ChangeLog
* 2005-10-05 Added Pango related APIs. - ((<kou>))
* 2005-10-03 Added GDK related APIs. - ((<kou>))