[alove] 18 Oct 2004 -  This page illustrates a couple ways to create full-screen toplevel windows.  I wrote these for Windows XP, but the bottom one is confirmed to work for Linux, and the first ''probably'' does.  All I can say is, give it a try.  ^_^


 package require Tcl 8.4
 
 wm title . "Full-screen with decorations"
 set a [expr {int([winfo screenwidth .] * 0.5)}]
 set b [expr {int([winfo screenheight .] * 0.5)}]
 wm geometry . 400x300+[expr $a - 200]+[expr $b - 150]  ;# window is centered
 update idletasks
 wm attributes . -topmost no
 
 frame .x -highlightthickness 0 -bg #c8efff
 place .x -x 0 -y 0 -relwidth 1 -relheight 1

 bind . <Expose> "focus -force ."
 bind . <KeyPress-Escape> "wm iconify ."
 

[alove] 11 Oct 2004 - This one has no decorations.  
  
 package require Tcl 8.4

 wm title . "Full-screen with NO decorations"
 wm overrideredirect . yes      ;# removes window decorations
 wm geometry . [winfo screenwidth .]x[winfo screenheight .]+0+0
 update idletasks               ;# updates the full-screen
 wm attributes . -topmost yes   ;# stays on top - needed for Linux
                                ;# on Win9x, if =no, alt-tab will malfunction
 frame .x -highlightthickness 0 -bg #c8efff
 place .x -x 0 -y 0 -relwidth 1 -relheight 1

 button .x.min -text "Minimize" -bg #ffdbff -font "arial 10 bold" \
    -command x_iconify
 place  .x.min -x [expr [winfo screenwidth  .] - 140] -y 10

 button .x.end -text "Close" -bg #ffdbff -font "arial 10 bold" \
    -command "destroy ."
 place  .x.end -x [expr [winfo screenwidth  .] - 60] -y 10

 bind . <Expose> "wm overrideredirect . yes; focus -force ."
 bind . <KeyPress-Escape> x_iconify

 proc x_iconify {} {
 wm overrideredirect . no
 wm iconify .
 }

This one works on WindowsXP, probably Win9x, and according to [rdt], now also on Linux. Just click on the "minimize" button or the <Escape> key. The trick is to use <Expose> to detect that the window is being deiconified. The "focus force ." is necessary for Windows, otherwise the <escape> doesn't work until you click on the window first.

Adam Love
--

[rdt] says on Linux, this works if the 'wm overrideredirect ...' comes before the 'wm geometry ...' if the 'wm attributes ...' is commented out it gives an error.

[alove] Thanks, I've corrected the code above.  NOTE: If you set topmost=no, you will have problems with alt-tab on Windows - the icon will disappear and you can only close the program via the task manager (end task).