- canvas ->initialise: width=int,
height=int
- Create an empty canvas of the given size.
- canvas ->geometry: x=[int],
y=[int], width=[int], height=[int]
- Move and/or resize the canvas. The drawing is kept. Resizing resets the
drawing state.
- canvas ->clear:
- Erase the drawing and reset the drawing state.
- canvas ->draw_in: graphical,
at=[point]
- Draw a graphical on the canvas, using the current transformation. As image
->draw_in.
- canvas ->move_to: x=num,
y=num
- Start a new sub-path at (X,Y).
- canvas ->line_to: x=num,
y=num
- Add a line from the current point to (X,Y).
- canvas ->rel_move_to: dx=num,
dy=num
- Start a new sub-path relative to the current point.
- canvas ->rel_line_to: dx=num,
dy=num
- Add a line relative to the current point.
- canvas ->curve_to: x1=num,
y1=num, x2=num, y2=num, x3=num, y3=num
- Add a cubic Bezier curve to (X3,Y3) with control points (X1,Y1) and
(X2,Y2).
- canvas ->arc: xc=num,
yc=num, radius=num, angle1=num, angle2=num
- Add a circular arc around (XC,YC) from Angle1 to Angle2, in the
direction of increasing angles. If there is a current point, a line
connects it to the start of the arc.
- canvas ->arc_negative: xc=num,
yc=num, radius=num, angle1=num, angle2=num
- As canvas
->arc,
in the direction of decreasing angles.
- canvas ->rectangle: x=num,
y=num, width=num, height=num
- Add a closed rectangle as a sub-path.
- canvas ->close_path:
- Add a line to the start of the current sub-path and close it.
- canvas ->new_path:
- Discard the current path.
- canvas ->new_sub_path:
- Start a new sub-path without a current point.
- canvas ->path: path
- Add the points of a path
object, with its curve, arc and move points, to the current path. See
class path.
- canvas ->stroke: preserve=[bool]
- Draw the line of the current path. Unless Preserve is @on,
the path is discarded.
- canvas ->fill: preserve=[bool]
- Fill the current path, using canvas
->fill_rule.
Unless Preserve is @on,
the path is discarded.
- canvas ->paint: alpha=[num]
- Paint the source everywhere within the clip, optionally with the given
opacity (0..1).
- canvas ->text: markup=char_array,
x=num, y=num, font=[font], width=[num]*, alignment=[{left,center,right}]
- Draw text in Pango markup with its top-left corner at (X,Y) using the
source for text without a colour in the markup. See class markup_text.
- canvas ->image: image=image,
x=num, y=num
- Draw an image with its top-left corner at (X,Y).
- canvas ->clip: preserve=[bool]
- Restrict further drawing to the current path, intersected with the
current clip. canvas
->restore_state
or canvas->reset_clip
undo this.
- canvas ->reset_clip:
- Remove the clip.
- canvas ->source: colour
|gradient|image - The paint used by canvas
->stroke, canvas->fill, canvas->paint
and canvas->text.
An image is repeated.
Defaults: black
- canvas ->line_width: num
- The width of lines drawn by canvas
->stroke.
Defaults: 2
- canvas ->stroke_style: texture_name
|stroke_style - Dashes, caps and joins of lines drawn by canvas
->stroke.
The paint of a stroke_style is ignored: use canvas->source.
- canvas ->fill_rule: {winding,even_odd}
- What canvas
->fill
and canvas->clip
consider inside. See path<-fill_rule.
Defaults: winding
- canvas ->save_state:
- Save the drawing state.
- canvas ->restore_state:
- Restore the drawing state of the matching canvas
->save_state.
Raises an error if there is no such call.
- canvas ->translate: dx=num,
dy=num
- Move the origin.
- canvas ->scale: sx=num,
sy=[num]
- Scale the coordinates. SY defaults to SX.
- canvas ->rotate: degrees=num
- Rotate the coordinates clockwise.
- canvas ->transform: transform
- Apply a transform
object to the coordinates.
- canvas ->identity:
- Reset the transformation.
