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<A HREF="toc.html">Contents</A>
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<A HREF="11Workingwithcanvasgraphs.html">Previous</A>
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<A HREF="112Creatingasimplecanvas.html">Next</A>
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<HR NOSHADE>
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<H2><A NAME="11_1">11.1 Introduction</A></H2>
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<P> Canvas graph is really not a graph. It a blank sheet of paper which
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you can use to draw arbitrary shapes and still have access to some of
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the convenient features of JpGraph.</P>
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<P> You can work with a canvas in different levels of complexity. You
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can for example work directly with the Image class which provides a
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large number of primitives for drawing but requires that you use
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absolute pixel coordinates.</P>
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<P> You can also make life a little bit easier by using a canvas scale.
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This lets you define your own scale on the canvas which often makes it
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easier by letting you work on a grid you have specified yourself. It
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also makes it very easy to re-scale you image automatically by just
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changing your scale. For example to half the size of you drawing you
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just make the scale twice as large.</P>
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<P> To give you some help in working with different canvas you should
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include the "jpgraph_canvtools.php" file when working on canvases. This
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is not strictly necessary but it will give you some nice abstraction to
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help you create your masterpieces.</P>
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<P> As another (concrete) example on the use of a canvas the figure
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below is a listing of font styles available with JpGraph.<DIV class="example">
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<BR> <A href="exframes/frame_listfontsex1.html" target="blank"><IMG border="0"
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HEIGHT="450" src="img/listfontsex1.png" WIDTH="550"></A>
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<BR><B>Figure 183:</B> Another example of using a canvas to draw a
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number of text boxes <A href="exframes/frame_listfontsex1.html" target="blank">
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[src]</A>
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<A HREF="toc.html">Contents</A>
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<A HREF="11Workingwithcanvasgraphs.html">Previous</A>
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<A HREF="112Creatingasimplecanvas.html">Next</A>
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