Tcl/Tk Part 2.

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Presentation transcript:

Tcl/Tk Part 2

Overview of Basic Tk Widgets widget name arguments = basic Tk syntax button calls tcl code when pushed checkbutton on/off (toggle) button entry text-entry widget frame frames widgets inside a box label displays text message listbox scrolled list radiobutton on/off button set; only one on scale analog value from min to max text text-entry widget

Overview of Tcl/Tk Syntax Command arg1 arg2 arg3 = execute the command with the given arguments “Text in quotes” = pass text in quotes as one arg; perform command and variable substitution {Text in braces} = pass text in braces as one arg; defer command and variable substitution $variable or ${variable} = substitute the value of the given variable [command arg] = execute command; substitute value for command between square brackets Command arg1 \ arg2 = extend command over one line command 1; command 2 = two commands on one line

Tcl/Tk Demos BWidget – widget library application Tktable – table application written in C BLT – graphs application These can be used to help build new applications and are all installed in the /usr/local directory of the machines sif and tyr. You can learn much from studying the code of these demos.

Running the Demos on sif and tyr BWidget /usr/local/BWidget/demo/demo.tcl Tktable (demos not in /usr/local) cd ~mitchell/Tktable2.8 demos/basic.tcl, demos/buttons.tcl BLT cd /usr/local/blt/lib/blt2.4/demos /usr/local/blt/bin/bltwish spline.tcl /usr/local/blt/bin/bltwish stripchart1.tcl