LTK - a Lisp binding to the Tk toolkit - Peter Herth

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5 Widgets 21 5.1 Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.2 Canvas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.3 Check-button . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.4 Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 5.5 Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 5.6 Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 5.7 Labelframe . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 5.8 Listbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 5.9 Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 5.10 Menubutton . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 5.11 Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 5.12 Paned-window . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 5.13 Radio-button . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 5.14 Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 5.15 Scrollbar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 5.16 Spinbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 5.17 Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 5.18 Toplevel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 5.19 Widget . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 6 Under the hood 53 6.1 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . 54 6.2 Writing Ltk extensions . . . . . . . . . . . . . . . . . . . . . . 55 7 ltk-remote 58 8 ltk-mw 58 8.1 progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 8.2 history-entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 8.3 menu-entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 9 Example: A “Hello World” application 60 2
1 Introduction Tk is a graphics toolkit for the tcl programming language developed by John Ousterhout. Initially developed for the X-Window system, it has been ported to a wide selection of operating systems, including Windows and MacOs. Due to ist ubiquous nature, its an ideal candidate to write a portable GUI library for Lisp. While one can find many code snippets how to set up a communication with Tk from Lisp, the use of those to create actual programs, requires tcl/tk knowledge. In fact this way the GUIs are created by tcl code put into lisp programs. But one does not become a Lisp programmer to then write the GUIs in tcl/tk. So the Ltk library was born, to create a wrapper around Tk in pure Lisp. Ideally, no tcl/tk knowledge is required to write GUIs. However the lisp code is made closely to the tcl/tk library structure, so that the man pages for the tk widgets can serve as a detailled reference. They should be readable without any tcl knowledge. The main objective for Ltk was to create a GUI library which is portable across different operating systems and Common Lisp implementations. Furthermore it should be easy to set up. So with the exception of one single function, the whole code of ltk is pure ANSI Common Lisp. No external programs besides a standard installation of tcl/tk are required. Ltk supports the following Lisp systems: Allegro, CMUCL, CLisp, ECL, LispWorks, OpenMCL, SBCL. Ltk was successfully tested using Lispworks, CLisp, CMUCL, SBCL under Linux and Lispworks, CLisp, and SBCL using Mac OS X, CLisp, Allegro and Lispworks using Windows. 3
Page 1: LTK - a Lisp binding to the Tk tool
Page 5 and 6: 3 Tutorial 3.1 First steps Let’s
Page 7 and 8: In this case, we set the width of t
Page 9 and 10: (create-oval canvas x0 y0 x1 y1) Cr
Page 11 and 12: 3.3.2 Example The function canvaste
Page 13 and 14: (load-text text filename) Loads the
Page 15 and 16: (set-geometry toplevel width height
Page 17 and 18: :after widget Pack it after the wid
Page 19 and 20: widget argument description button
Page 21 and 22: 5 Widgets In this section the avail
Page 23 and 24: image the image to display on the w
Page 25 and 26: selectforeground state takefocus if
Page 27 and 28: indicatoron justify justification o
Page 29 and 30: selectbackground selectborderwidth
Page 31 and 32: 5.6 Label The following keyword arg
Page 33 and 34: 5.7 Labelframe The following keywor
Page 35 and 36: 5.8 Listbox The following keyword a
Page 37 and 38: 5.9 Menu The following keyword argu
Page 41 and 42: 5.12 Paned-window The following key
Page 45 and 46: showvalue sliderlength sliderrelief
Page 47 and 48: 5.16 Spinbox The following keyword
Page 49 and 50: 5.17 Text The following keyword arg
Page 51 and 52: 5.18 Toplevel The following keyword
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6 Under the hood In this section, t
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6.2 Writing Ltk extensions It is di
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(defmethod balloon-bind ((balloon b
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8.2 history-entry History-entry is
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Once you have build your core, all
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foreground, 10, 13, 17, 19, 22, 24,
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underline, 10, 14, 18, 23, 30, 34 u
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LTK - a Lisp binding to the Tk toolkit - Peter Herth

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