Skip to main content

Improving Notebook Tearoff Functionality

The Gtk+ libraries provide the necessary support to detach notebook tabs in order to attach them to other notebooks in the same group or to place them in floating windows. This is fine. But, what happens when a floating palette is destroyed? Well, the notebook and any pages that it contains will be lost too. Unfortunately, the Gtk+ libs do not re-attach pages to any original note book when other notebooks in the group are deleted. In otherwords, pages will be lost and it up the application to create new instances. The following script shows how to do it. It relies upon the gnocl::winfo exists sub-command, which has only just been added. So, anyone trying out this script will need to use the nightly build dated 16-Jan-13 or later.

# test-notebook-tearoff.tcl
#!/bin/sh \
exec tclsh "$0" "$@"

package require Gnocl

#---------------
# create notebook contents
#---------------
#
proc addStuff {} {

    set notebook1 [gnocl::notebook \
        -scrollable 1 \
        -tabPosition left \
        -onCreateWindow {
            %w configure -title "TEAR OFF NOTEBOOK"
            } \
        -groupId 1 ]


    proc addFirst {nb} {
   
        if { ![gnocl::winfo exists $nb] } { return }
   
        $nb addPage [gnocl::label \
            -text "First Page" \
            -onDestroy "addFirst $nb"] "%__First"
    }

    proc addSecond {nb} {
   
        if { ![gnocl::winfo exists $nb] } { return }
   
        $nb addPage [gnocl::label \
            -text "Second Page" \
            -onDestroy "addSecond $nb" ] "%__Second"
    }

    proc addThird {nb} {

        if { ![gnocl::winfo exists $nb] } { return }

        $nb addPage [gnocl::label \
            -text "Third Page" \
            -onDestroy "addThird $nb"] "%__Third"
    }

    proc addFourth {nb} {
   
        if { ![gnocl::winfo exists $nb] } { return }
   
        $nb addPage [gnocl::label \
            -text "Fourth Page" \
            -onDestroy "addFourth $nb"] "%__Fourth"
   
    }

    foreach  a [list First Second Third Fourth] { add$a $notebook1 }

    return $notebook1

}

gnocl::window \
    -title "Notebook1" \
    -child [addStuff] \
    -setSize 0.3 \
    -onDestroy exit

Comments

Post a Comment

Popular posts from this blog

gnocl::calendar

Given this module some attention today. Added some of the more package wide options to the module and created customised handler for setting the month. (For some odd reason months are are counted 0-11 whereas days are 1-31.) There's still a little more to do to this one including the addition of code to store diary details. Here's the working test script to show the range of options at work. The percentage substitution string item %e explores something that I've been toying with, the name of the signal/event that initiated the call. Ok, a script can keep its own internal trace but who knows, it might prove useful. #--------------- # calendarTest.tcl #--------------- # Author:   William J Giddings # Date:     07/05/09 #--------------- #!/bin/sh # the next line restarts using tclsh \ exec tclsh "$0" "$@" #--------------- package require Gnocl set cal [gnocl::calendar] $cal configure -day 8 -month 7 -year 1956 $cal configure -rowHeight 1 -colWidth 1 $ca
7 comments
Read more

Gnocl Dashboard

Over the past few programming sessions I've been working on producing a central point, a dashboard, around which it's possible to see the various Gnocl widgets and commands in operation. In many ways like the demo script which shipped with the earlier releases of Gnocl but offers much more. The introspection functionality provides details of the various options and sub-commands of each Gnocl procedure which are displayed under the associated tab. Sample scripts are included for each item which offers newcomers a clearer insight into how make the most of what's on offer.
6 comments
Read more

Creating a button box with right aligned widgets

The dialog widget has its own internal functionaluty to create and position buttons at the bottom right corner of the window container. When creating these for ourselves it must be born in mind that default settings for fill and expand are both 0.5. Failing to set these will always place the child objects in the centre, regardless of alignment. For most cases these defaults are acceptable but, to create that dialog-button arrangement, use the following snippet as a model!   # to right align completely, set expand and fill to 0 set hbox [gnocl::hBox] set b1 [gnocl::button -text Select \                -data $lst                 -onClicked { puts DO-SOMETHING-WITH-%d} ] set b2 [gnocl::button -text Cancel -onClicked { puts DONE! } ] $vbox add $hbox -expand 0 -fill 0 -align right $hbox add $b1 $hbox add $b2
Post a Comment
Read more