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* grapher/CairoWidget.cxx (CairoTextBox::draw): Use
boost::is_from_range instead of is_any_of. Reports on the net
suggest that is_any_of triggers a compiler bug.
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A silly change, but this works better with other tools, like git
diff. I should have started the C++ files this way.
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* grapher/CairoWidget.cxx (CairoTextBox::draw): Use font information
to caculate legible spacing. Also change the font to something more
readable.
* testsuite/systemtap.examples/general/grapher.stp: Put carriage
returns in the right spots.
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This is accompanied by support for multiline output in hover text.
* grapher/StapParser.cxx (ioCallback): Read data 'til the end of line
character, not just '\n'. Be careful to use I/O functions that don't
treat '\n' specially.
* grapher/StapParser.hxx: ditto
* grapher/CairoWidget.cxx (CairoTextBox::draw): Perform line breaks
for hover text.
* testsuite/systemtap.examples/general/grapher.stp: Do multiline
output of keyboard events. Also, fix longstanding breaking in the
pty probe.
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When the graph display is paused, leaving the mouse stationary over
the graph will display the data point under the pointer.
* grapher/CairoWidget.hxx (CairoTextBox): new class
(CairoWidget, CairoPlayButton): refector some play button-specific
things from CairoWidget to CairoPlayButton.
* grapher/CairoWidget.cxx (CairoTextBox::draw): new function.
* grapher/GraphWidget.hxx (GraphWidget): new members for supporting
hover text.
* grapher/GraphWidget.cxx (on_motion_notify_event): Set up hover text box.
(establishHoverTimeout, onHoverTimeout, getGraphUnderPoint): new functions.
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