You can still bind normal event handlers as well. Just update whatever variables you need, then call the updateGraph() function manually.

Something like:

my $viewbutton = $mw->Button(-text=>"Change view", -command=>\&changeV
+iew);

...

sub changeView {
    $viewmode++;
    if($viewmode > 3) {
        $viewmode = 0;
    }
    updateGraph();
    return;
}

[download]

Tk::Chart is an extension of Tk::Canvas, which has support for Mouse interactions. You probably want to use $canvas->bind() or something similar to get mouse interactions with the canvas as event callbacks. To quote the documentation:

The only events for which bindings may be specified are those related 
+to the mouse and keyboard (such as Enter, Leave, 
ButtonPress, Motion, and KeyPress) or virtual events. The handling of 
+events in canvases uses the current item defined
 in "ITEM IDS AND TAGS" above. Enter and Leave events trigger for an i
+tem when it becomes the current item or ceases to
 be the current item; note that these events are different than Enter 
+and Leave events for windows. Mouse-related 
events are directed to the current item, if any. Keyboard-related even
+ts are directed to the focus item, if any (see 
the focus method below for more on this). If a virtual event is used i
+n a binding, that binding can trigger only if 
the virtual event is defined by an underlying mouse-related or keyboar
+d-related event.

[download]

Frankly, i would have to spend a few hours of reading and testing on how exactly this would all work related to your graphs (which i leave as an excersise for the reader), but it sounds promising for what you want it to do.

perl -e 'use MIME::Base64; print decode_base64("4pmsIE5ldmVyIGdvbm5hIGdpdmUgeW91IHVwCiAgTmV2ZXIgZ29ubmEgbGV0IHlvdSBkb3duLi4uIOKZqwo=");'

In reply to Re^3: Tk::Chart adding data to displayed graph by cavac
in thread Tk::Chart adding data to displayed graph by tobbes

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.