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<a name="Module:Scientific.TkWidgets.TkPlotCanvas"><h1>Module Scientific.TkWidgets.TkPlotCanvas</h1></a>
<hr width=70%>
<a name="Class:Scientific.TkWidgets.TkPlotCanvas.PolyLine"><h2>Class PolyLine: Multiple connected lines</h2></a>
<p>Constructor: PolyLine(<i>points</i>, **|attr|)</p>
<p><dl>
<dt><i>points</i></dt>
<dd><p>
any sequence of (x, y) number pairs</p></dd>
<dt><i>attr</i></dt>
<dd><p>
line attributes specified by keyword arguments:<ul>
<li> <p>
<tt>width</tt>: the line width (default: 1)
</p><li> <p>
<tt>color</tt>: a string whose value is one of the color names defined in Tk
(default: "black")
</p><li> <p>
<tt>stipple</tt>: a string whose value is the name of a bitmap defined in Tk,
or <tt>None</tt> for no bitmap (default: <tt>None</tt>)
</p></ul>
</p></dd>
</dl>
</p>
<hr width=70%>
<a name="Class:Scientific.TkWidgets.TkPlotCanvas.PolyMarker"><h2>Class PolyMarker: Series of markers</h2></a>
<p>Constructor: PolyPoints(<i>points</i>, **|attr|)</p>
<p><dl>
<dt><i>points</i></dt>
<dd><p>
any sequence of (x, y) number pairs</p></dd>
</dl>
</p>
<p><i>attr</i> marker attributes specified by keyword arguments:<ul>
<li> <p>
<tt>width</tt>: the line width for drawing the marker (default: 1)
</p><li> <p>
<tt>color</tt>: a string whose value is one of the color names defined in Tk,
defines the color of the line forming the marker
(default: black)
</p><li> <p>
<tt>fillcolor</tt>: a string whose value is one of the color names defined
in Tk, defines the color of the interior of the marker
(default: black)
</p><li> <p>
<tt>marker</tt>: one of <tt>circle</tt> (default), <tt>dot</tt>, <tt>square</tt>, <tt>triangle</tt>,
<tt>triangle_down</tt>, <tt>cross</tt>, <tt>plus</tt>
</p></ul>
</p>
<hr width=70%>
<a name="Class:Scientific.TkWidgets.TkPlotCanvas.PlotGraphics"><h2>Class PlotGraphics: Compound graphics object</h2></a>
<p>Constructor: PlotGraphics(<i>objects</i>)</p>
<p><dl>
<dt><i>objects</i></dt>
<dd><p>
a list whose elements can be instances of the classes
PolyLine, PolyPoint, and PlotGraphics.
</p></dd>
</dl>
</p>
<hr width=70%>
<a name="Class:Scientific.TkWidgets.TkPlotCanvas.PlotCanvas"><h2>Class PlotCanvas: Tk plot widget</h2></a>
<p>Constructor: PlotCanvas(<i>master</i>, <i>width</i>, <i>height</i>, **|attributes|).</p>
<p>The arguments have the same meaning as for a standard Tk canvas.
The default background color is white and the default font is
Helvetica at 10 points.</p>
<p>PlotCanvas objects support all operations of Tk widgets.</p>
<p>There are two attributes in addition to the standard Tk attributes:</p>
<p><dl>
<dt><i>zoom</i></dt>
<dd><p>
a logical variable that indicates whether interactive
zooming (using the left mouse button) is enabled; the
default is 0 (no zoom)</p></dd>
<dt><i>select</i></dt>
<dd><p>
enables the user to select a range along the x axis
by dragging the mouse (with the left button pressed)
in the area <i>under</i> the x axis. If <i>select</i> is 0,
no selection is possible. Otherwise the value of <i>select</i>
must be a callable object that is called whenever the
selection changes, with a single argument that can be
None (no selection) or a tuple containing two
x values.
</p></dd>
</dl>
</p>
<b>Methods:</b><br>
<ul>
<li> <b><i>draw</i></b>(<i>graphics</i>, <i>xaxis</i>=<tt>None</tt>, <i>yaxis</i>=<tt>None</tt>)
<p>Draws the graphics object <i>graphics</i>, which can be
a PolyLine, PolyMarker, or PlotGraphics object. The
arguments <i>xaxis</i> and <i>yaxis</i> specify how axes are
drawn: <tt>None</tt> means that no axis is drawn and the graphics
objects are scaled to fill the canvas optimally. <tt>"automatic"</tt>
means that the axis is drawn and a suitable value range is
determined automatically. A sequence of two numbers means
that the axis is drawn and the value range is the interval
specified by the two numbers.
</p>
<li> <b><i>clear</i></b>()
<p>Clears the canvas.</p>
<li> <b><i>redraw</i></b>()
<p>Redraws the last canvas contents.</p>
<li> <b><i>select</i></b>(<i>range</i>)
<p>Shows the given <i>range</i> as highlighted. <i>range</i> can be
None (no selection) or a sequence of two values on the
x-axis.</p>
</ul>
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