Créer  Editer  FrontPage  Index  Chercher  Changements  History  RSS  Login

Pango::Renderer

class Pango::Renderer

Pango::Renderer is a base class for objects that are used to render Pango objects such as Pango::GlyphString? and Pango::Layout. Since 1.8

Instance Methods

draw_layout(layout, x, y)
Draws layout with the specified Pango::Renderer. Since 1.8
  • layout: a Pango::Layout
  • x: x position of left edge of baseline, in user space coordinates in Pango units.
  • y: y position of top edge of baseline, in user space coordinates in Pango units.
  • Returns: self
draw_layout_line(line, x, y)
Draws line with the specified Pango::Renderer. Since 1.8
  • line: a Pango::LayoutLine?
  • x: x position of left edge of baseline, in user space coordinates in Pango units.
  • y: y position of top edge of baseline, in user space coordinates in Pango units.
  • Returns: self
draw_glyphs(font, glyphs, x, y)
Draws the glyphs with the specified Pango::Renderer. Since 1.8
  • font: a Pango::Font
  • glyphs: a Pango::GlyphString?
  • x: x position of left edge of baseline, in user space coordinates in Pango units.
  • y: y position of top edge of baseline, in user space coordinates in Pango units.
  • Returns: self
draw_rectangle(part, x, y, width, height)
Draws an axis-aligned rectangle in user space coordinates with the specified Pango::Renderer. Since 1.8
  • part: type of object this rectangle is part of (Pango::Renderer#Part)
  • x: x position at which to draw rectangle, in user space coordinates in Pango units
  • y: y position at which to draw rectangle, in user space coordinates in Pango units
  • width: width of rectangle in Pango units user space coordinates
  • height: height of rectangle in Pango units in user space coordinates
  • Returns: self
draw_error_underline(x, y, width, height)
Draw a squiggly line that approximately covers the given rectangle in the style of an underline used to indicate a spelling error. (The width of the underline is rounded to an integer number of up/down segments and the resulting rectangle is centered in the original rectangle) Since 1.8
  • x: X coordinate of underline, in Pango units in user coordinate system
  • y: Y coordinate of underline, in Pango units in user coordinate system
  • width: width of underline, in Pango units in user coordinate system
  • height: height of underline, in Pango units in user coordinate system
  • Returns: self
draw_trapezoid(part, y1, x11, x21, y2, x12, x22)
Draws a trapezoid with the parallel sides aligned with the X axis using the given Pango::Renderer; coordinates are in device space. Since 1.8
  • part: type of object this trapezoid is part of (Pango::Renderer#Part)
  • y1: Y coordinate of top of trapezoid
  • x11: X coordinate of left end of top of trapezoid
  • x21: X coordinate of right end of top of trapezoid
  • y2: X coordinate of top of trapezoid
  • x12: X coordinate of left end of top of trapezoid
  • x22: Y coordinate of left end of top of trapezoid
  • Returns: self
draw_glyph(font, glyph, x, y)
Draws a single glyph with coordinates in device space. Since 1.8
  • font: a Pango::Font
  • glyph: the glyph index(Integer) of a single glyph
  • x: X coordinate of left edge of baseline of glyph
  • y: Y coordinate of left edge of baseline of glyph
  • Returns: self
activate
Does initial setup before rendering operations on the Pango::Renderer. Pango::Renderer#deactive should be called when done drawing. Calls such as Pango::Renderer#draw_layout automatically activate the layout before drawing on it. Calls to Pango::Renderer#activate and Pango::Renderer#deactivate can be nested and the Pango::Renderer will only be initialized and deinitialized once. Since 1.8
  • Returns: self
deactivate
Cleans up after rendering operations on the Pango::Renderer. See docs for Pango::Renderer#activate. Since 1.8
  • Returns: self
get_color(part)
Gets the current rendering color for the specified part. Since 1.8
  • part: the part to get the color for (Pango::Renderer#Part)
  • Returns: the Pango::Color? for the specified part, or nil if it hasn't been set and should be inherited from the environment.
set_color(part, color)
Sets the color for part of the rendering. Since 1.8
  • part: the part to change the color of (Pango::Renderer#Part)
  • color: the new Pango::Color? or nil to unset the current color
  • Returns: self
part_changed(part)
Informs Pango that the way that the renderering is done for part has changed in a way that would prevent multiple pieces being joined together into one drawing call. For instance, if a subclass of Pango::Renderer was to add a stipple option for drawing underlines, it needs to call Pango::Renderer#part_changed(Pango::Renderer::PART_UNDERLINE). When the stipple changes or underlines with different stipples might be joined together. Pango automatically calls this for changes to colors. (See Pango::Renderer#set_color) Since 1.8
matrix
Gets the transformation matrix that will be applied when rendering. See Pango::Renderer#matrix=. Since 1.8
  • Returns: the Pango::Matrix?, or nil if no matrix has been set (which is the same as the identity matrix).
matrix=(matrix)
Sets the transformation matrix that will be applied when rendering. Since 1.8
  • matrix: a Pango::Matrix?, or nil to unset any existing matrix (No matrix set is the same as setting the identity matrix).
  • Returns: matrix
set_matrix(matrix)
Same as Pango::Renderer#matrix=. Since 1.8
  • matrix: a Pango::Matrix?, or nil to unset any existing matrix (No matrix set is the same as setting the identity matrix).
  • Returns: self

Constants

Part

Part defines different items to render for such purposes as setting colors. You can omit "Renderer::" like as Pango::PART_FOREGROUND instead of Pango::Renderer::PART_FOREGROUND. Since 1.8

PART_FOREGROUND
the text itself
PART_BACKGROUND
the area behind the text
PART_UNDERLINE
underlines
PART_STRIKETHROUGH
strikethrough lines

ChangeLog

  • 2005-11-17 Added - Masao?
Dernière modification:2011/06/21 21:43:54
Mots clef:
Références:[Gdk::Pango] [Pango::Renderer] [Gdk::PangoRenderer]