ruby-****@sourc*****
ruby-****@sourc*****
2005年 11月 17日 (木) 19:36:11 JST
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URL = /hiki.cgi?Pango%3A%3ARenderer
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TITLE = Pango::Renderer
KEYWORD =
= 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.
== Object Hierarchy
* Object
* GLib::Instantiatable
* GLib::Object
* Pango::Renderer
== 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.
* 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.
* 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.
* Returns: self
--- deactivate
Cleans up after rendering operations on the Pango::Renderer. See docs for Pango::Renderer#activate.
* Returns: self
--- get_color(part)
Gets the current rendering color for the specified part.
* 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.
* 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)
* part: the part for which rendering has changed (Pango::Renderer#Part)
* Returns: self
--- matrix
Gets the transformation matrix that will be applied when rendering. See Pango::Renderer#matrix=.
* 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.
* 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=.
* 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.
--- 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>))