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- matplotlib.backend_bases.FigureCanvasBase
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- FigureCanvasAgg
- matplotlib.backend_bases.RendererBase
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- RendererAgg
class FigureCanvasAgg(matplotlib.backend_bases.FigureCanvasBase) |
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The canvas the figure renders into. Calls the draw and print fig
methods, creates the renderers, etc...
Public attribute
figure - A Figure instance
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Methods defined here:
- draw(self)
- Draw the figure using the renderer
- print_figure(self, filename, dpi=150, facecolor='w', edgecolor='w', orientation='portrait')
- Render the figure to hardcopy. Set the figure patch face and
edge colors. This is useful because some of the GUIs have a
gray figure face color background and you'll probably want to
override this on hardcopy
If the extension matches PNG, write a PNG file
If the extension matches BMP or RAW, write an RGBA bitmap file
- tostring_rgb(self)
Methods inherited from matplotlib.backend_bases.FigureCanvasBase:
- __init__(self, figure)
- mpl_connect(self, s, func)
- Connect event with string s to func. The signature of func is
def func(event)
where event is a MplEvent. Events you should handle
button_press_event - event.x, event.y and event.button must
be defined
button_release_event - event.x, event.y and event.button must
be defined
motion_notify_event - event.x and event.y must be defined x,y = 0,0
is lower, left of canvas in pixel coords. Event.button is
optionally defined
For the three events above, if the mouse is over the axes,
the variable event.inaxes will be set to the axes it is over,
and additionally, the variables event.xdata and event.ydata
will be defined. This is the mouse location in data coords.
See MplEvent.
return value is a connection id that can be used with
mpl_disconnect
- mpl_disconnect(self, cid)
- Connect s to func. return an id that can be used with disconnect
- switch_backends(self, FigureCanvasClass)
- instantiate an instance of FigureCanvasClass
This is used for backend switching, eg, to instantiate a
FigureCanvasPS from a FigureCanvasGTK. Note, deep copying is
not done, so any changes to one of the instances (eg, setting
figure size or line props), will be reflected in the other
Data and other attributes inherited from matplotlib.backend_bases.FigureCanvasBase:
- events = ('button_press_event', 'button_release_event', 'motion_notify_event')
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class RendererAgg(matplotlib.backend_bases.RendererBase) |
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The renderer handles all the drawing primitives using a graphics
context instance that controls the colors/styles
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Methods defined here:
- __init__(self, width, height, dpi)
- draw_arc(self, gcEdge, rgbFace, x, y, width, height, angle1, angle2)
- Draw an arc centered at x,y with width and height and angles
from 0.0 to 360.0
If rgbFace is not None, fill the rectangle with that color. gcEdge
is a GraphicsContext instance
Currently, I'm only supporting ellipses, ie angle args are
ignored
- draw_line(self, gc, x1, y1, x2, y2)
- x and y are equal length arrays, draw lines connecting each
point in x, y
- draw_mathtext(self, gc, x, y, s, prop, angle)
- Draw the math text using matplotlib.mathtext
- draw_point(self, gc, x, y)
- Draw a single point at x,y
- draw_text(self, gc, x, y, s, prop, angle, ismath)
- Render the text
- get_canvas_width_height(self)
- return the canvas width and height in display coords
- get_text_width_height(self, s, prop, ismath)
- get the width and height in display coords of the string s
with FontPropertry prop
- points_to_pixels(self, points)
- convert point measures to pixes using dpi and the pixels per
inch of the display
- tostring_rgb(self)
Data and other attributes defined here:
- debug = 1
Methods inherited from matplotlib.backend_bases.RendererBase:
- close_group(self, s)
- close a grouping element with label s
- draw_image(self, x, y, im, origin, bbox)
- Draw the Image instance into the current axes; x is the
distance in pixels from the left hand side of the canvas. y is
the distance from the origin. That is, if origin is upper, y
is the distance from top. If origin is lower, y is the
distance from bottom
origin is 'upper' or 'lower'
bbox is a matplotlib.transforms.BBox instance for clipping, or
None
- draw_line_collection(self, segments, transform, clipbox, colors, linewidths, antialiaseds, offsets, transOffset)
- This is a function for optimized line drawing. If you need to
draw many line segments with similar properties, it is faster
to avoid the overhead of all the object creation etc. The
lack of total configurability is compensated for with
efficiency. Hence we don't use a GC and many of the line
props it supports. See matplotlib.collections for more
details
sements is a sequence of ( line0, line1, line2), where linen =
(x0, y0), (x1, y1), ... (xm, ym). Each line can be a
different length
transform is used to Transform the lines
clipbox is a xmin, ymin, width, height clip rect
colors is a tuple of RGBA tuples
linewidths is a tuple of linewidths
antialiseds is a tuple of ones or zeros indicating whether the
segment should be aa or not
offsets, if not None, is a list of x,y offsets to translate
the lines by after transoff is used to transform the offset
coords
This function is intended to be overridden by the backend
level in extension code for backends that want fast line
collection drawing. Here is is implemented using native
backend calls and may be slow
- draw_lines(self, gc, x, y)
- x and y are equal length arrays, draw lines connecting each
point in x, y
- draw_poly_collection(self, verts, transform, clipbox, facecolors, edgecolors, linewidths, antialiaseds, offsets, transOffset)
- Draw a polygon collection
verts are a sequence of polygon vectors, where each polygon
vector is a sequence of x,y tuples of vertices
facecolors and edgecolors are a sequence of RGBA tuples
linewidths are a sequence of linewidths
antialiaseds are a sequence of 0,1 integers whether to use aa
- draw_polygon(self, gc, rgbFace, points)
- Draw a polygon. points is a len vertices tuple, each element
giving the x,y coords a vertex
If rgbFace is not None, fill the poly with it. gc
is a GraphicsContext instance
- draw_rectangle(self, gcEdge, gcFace, x, y, width, height)
- Draw a rectangle with lower left at x,y with width and height.
If gcFace is not None, fill the rectangle with it. gcEdge
is a GraphicsContext instance
- draw_regpoly_collection(self, clipbox, offsets, transOffset, verts, sizes, facecolors, edgecolors, linewidths, antialiaseds)
- Draw a regular poly collection
offsets is a sequence is x,y tuples and transOffset maps this
to display coords
verts are the vertices of the regular polygon at the origin
sizes are the area of the circle that circumscribes the
polygon in points^2
facecolors and edgecolors are a sequence of RGBA tuples
linewidths are a sequence of linewidths
antialiaseds are a sequence of 0,1 integers whether to use aa
- flipy(self)
- return true if y small numbers are top for renderer
- get_text_extent(self, text)
- Get the text extent in window coords
- new_gc(self)
- Return an instance of a GraphicsContextBase
- open_group(self, s)
- open a grouping element with label s
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