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- matplotlib.backend_bases.FigureCanvasBase
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- FigureCanvasTemplate
- matplotlib.backend_bases.FigureManagerBase
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- FigureManagerTemplate
- FigureManagerTemplate
- matplotlib.backend_bases.GraphicsContextBase
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- GraphicsContextTemplate
- matplotlib.backend_bases.RendererBase
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- RendererTemplate
class FigureCanvasTemplate(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
- realize(self, *args)
- This method will be called when the system is ready to draw,
eg when a GUI window is realized
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 GraphicsContextTemplate(matplotlib.backend_bases.GraphicsContextBase) |
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The graphics context provides the color, line styles, etc... See
the gtk and postscript backends for examples of mapping the
graphics context attributes (cap styles, join styles, line widths,
colors) to a particular backend. In GTK this is done by wrapping
a gtk.gdk.GC object and forwarding the appropriate calls to it
using a dictionary mapping styles to gdk constants. In
Postscript, all the work is done by the renderer, mapping line
styles to postscript calls.
The base GraphicsContext stores colors as a RGB tuple on the unit
interval, eg, (0.5, 0.0, 1.0). You will probably need to map this
to colors appropriate for your backend. Eg, see the ColorManager
class for the GTK backend. If it's more appropriate to do the
mapping at the renderer level (as in the postscript backend), you
don't need to override any of the GC methods. If it's more
approritate to wrap an instance (as in the GTK backend) and do the
mapping here, you'll need to override several of the setter
methods.
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Methods inherited from matplotlib.backend_bases.GraphicsContextBase:
- __init__(self)
- copy_properties(self, gc)
- Copy properties from gc to self
- get_alpha(self)
- Return the alpha value used for blending - not supported on
all backends
- get_antialiased(self)
- Return true if the object shuold try to do antialiased rendering
- get_capstyle(self)
- Return the capstyle as a string in ('butt', 'round', 'projecting')
- get_clip_rectangle(self)
- Return the clip rectangle as (left, bottom, width, height)
- get_dashes(self)
- Return the dash information as an offset dashlist tuple The
dash list is a even size list that gives the ink on, ink off
in pixels. See p107 of to postscript BLUEBOOK for more info
Default value is None
- get_joinstyle(self)
- Return the line join style as one of ('miter', 'round', 'bevel')
- get_linestyle(self, style)
- Return the linestyle: one of ('solid', 'dashed', 'dashdot',
'dotted').
- get_linewidth(self)
- Return the line width in points as a scalar
- get_rgb(self)
- returns a tuple of three floats from 0-1. color can be a
matlab format string, a html hex color string, or a rgb tuple
- set_alpha(self, alpha)
- Set the alpha value used for blending - not supported on
all backends
- set_antialiased(self, b)
- True if object should be drawn with antialiased rendering
- set_capstyle(self, cs)
- Set the capstyle as a string in ('butt', 'round', 'projecting')
- set_clip_rectangle(self, rectangle)
- Set the clip rectangle with sequence (left, bottom, width, height)
- set_dashes(self, dash_offset, dash_list)
- Set the dash style for the gc. dash offset is the offset
(usually 0). Dash list specifies the on-off sequence as
points
- set_foreground(self, fg, isRGB=None)
- Set the foreground color. fg can be a matlab format string, a
html hex color string, an rgb unit tuple, or a float between 0
and 1. In the latter case, grayscale is used.
The GraphicsContext converts colors to rgb internally. If you
know the color is rgb already, you can set isRGB to True to
avoid the performace hit of the conversion
- set_graylevel(self, frac)
- Set the foreground color to be a gray level with frac frac
- set_joinstyle(self, js)
- Set the join style to be one of ('miter', 'round', 'bevel')
- set_linestyle(self, style)
- Set the linestyle to be one of ('solid', 'dashed', 'dashdot',
'dotted').
- set_linewidth(self, w)
- Set the linewidth in points
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class RendererTemplate(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:
- 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 it. gcEdge
is a GraphicsContext instance
- draw_line(self, gc, x1, y1, x2, y2)
- Draw a single line from x1,y1 to x2,y2
- draw_lines(self, gc, x, y)
- x and y are equal length arrays, draw lines connecting each
point in x, y
- draw_point(self, gc, x, y)
- Draw a single point at x,y
- draw_polygon(self, gcEdge, 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 rectangle with it. gcEdge
is a GraphicsContext instance
- draw_rectangle(self, gcEdge, rgbFace, x, y, width, height)
- Draw a rectangle at lower left x,y with width and height.
If rgbFace is not None, fill the rectangle with it. gcEdge
is a GraphicsContext instance
- draw_text(self, gc, x, y, s, prop, angle, ismath=False)
- Render the matplotlib.text.Text instance at x, y in window
coords using GraphicsContext gc
- flipy(self)
- return true if y small numbers are top for renderer
- get_canvas_width_height(self)
- return the canvas width and height in display coords
- get_text_width_height(self, s, fontsize, ismath=False)
- get the width and height in display coords of the string s
with fontsize in points
- new_gc(self)
- Return an instance of a GraphicsContextTemplate
- points_to_pixels(self, points)
- convert points to display units. Many imaging systems assume
some value for pixels per inch. Eg, suppose yours is 96 and
dpi = 300. Then points to pixels is
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_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_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
- get_text_extent(self, text)
- Get the text extent in window coords
- open_group(self, s)
- open a grouping element with label s
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