Skip to main content

gnocl::iconView - more work

The past few days has seen little posted to the blog but that doesn't mean that the Gnocl wheel has not been turning! Earlier this week I posted an article to tutorials page at gnocl.org to show how easy it is to set up and C-coded packages for Tcl. There are some useful materials in the Tcler's wiki but I wanted something much more. Most of the inconvenience is continuously creating the basic skeleton and makefiles etc. I created some boiler plates for new packages and all of the naming, versioning and so on are managed through the Makefile.

Today I turned my attention back to the gnocl::iconView widget. This object will now happily accept new images and add them to the display.

Here's the test script.

#---------------
# Author:   William J Giddings
# Date:     28/01/11
#---------------
#!/bin/sh
# the next line restarts using tclsh \
exec tclsh "$0" "$@"
#---------------

package require Gnocl

#-icons [list wjg.png gnocl.png wjg.png gnocl.png wjg.png gnocl.png] \

if { 0 } {
set iv [gnocl::iconView \
    -columnSpacing 20 \
    -margin 5 \
    -spacing 15 \
    -columns 4 \
    -rowSpacing 20 \
    -pixbufColumn 0 \
    -textColumn 1 \
]
}

set iv [gnocl::iconView]

$iv add "%/./georgie.png" -label Georgie
$iv add "%/./wjg.png" -label WiGi
$iv add "%/./gnocl.png" -label NEW
$iv add "%/./wjg.png" -label WiGi

gnocl::window \
    -child $iv \
    -title gnocl::iconView \
    -widthRequest 200 \
    -heightRequest 200

gnocl::mainLoop
 

Can't really say that I've found these two tasks fulfilling. It meant going over some old code the errors within which I had long  since forgotten and had to resolve these before being able to move forward.

Comments

Popular posts from this blog

Simple Runtime Debugging Message Dialog

At times it's useful to see what values variables hold, or offer some pause point before the code goes elsewhere before causing havoc. Its possible to write output to the terminal but this can get lost in copious forms of other outputs, besides, there's no pausing the script execution either. The following proc creates a custom dialog which displays ad message along with the point in the calling script from which it was invoked. ## simple runtime debugging feedback dialog, alternative to console based gnocl::msg # @param msg message to display # @returns none # proc xxx::msg {txt} { set frame [info frame -1] append msg "Message:\n\n" append msg " $txt \n\n\n" append msg "Called from:\n\n" append msg "Proc:\t[lindex [info level -1] 0]\n" append msg "File:\t[file tail [dict get $frame file]]\n" append msg "Line:\t[dict get $frame line]\n" gnocl::dialog \ -type info \ -text $msg

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

Changing Namespaces

I've been toying with the idea of changing the namespace used by gnocl, to something simplier, a proposition much more appealing now that I've begun migration to Gtk3 and soon to Gtk4. The changes from Gtk2 to Gtk4 will be subtantial due to many chages occuring within the Gtk api. Before committing myself, I thought how it would be useful to swap namespaces on the fly. So, here's a first quick solution:   package require -exact Gnocl 0.9.96 proc xxxx {ns1 ns2}  {     namespace eval ::${ns2} {}     set map [list $ns1 $ns2]          foreach type {commands vars procs } {         foreach item [info $type ${ns1}::*] {             set err ""             catch { rename $item [string map $map $item] } err             if { $err != "" } { puts $err }         }     }          namespace delete $ns1 } xxxx g set b1 [g::button -text BUTTON] set w1 [g::window -child $b1] set l1 [g::label -text rename] $w1 configure -child $l1 -title TEST