April Changes and Updates

A few useful little tweaks and changes. The most significant is the introduction of a number of settings and internal code modifications to allow for the use of multiple monitors.

2020-04:

    gnocl::pixBuf
        o commands screenshot, windshow and widgetshot now work correctly.
    gnocl::screenShot
        o new command
    gnocl::text
        o -onInsertText this GtkTextBuffer callback binding now supports %w, the widgetId of the textview assoicated with the buffer.
    gnocl::image
        o cget -image now returns path/name of the image file displayed.
    gnocl::eventBox
        o new option -onDoubleClick
    gnocl::layout
        o new option -background
    gnocl::screen
        o "screens" command renamed to nMonitors, now works properly.
        o "geometry" command returns a list of the geometries of all system monitors.
    gnocl::window
        o "centre" and "center" commands now accept new option -monitor, range 0 - n.
        o -resizeMode now works, options: parent, queue, immediate.

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...

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.

Getting Widget Style Properties

Until the move over to Gtk4, Gnocl is still built against the Gtk 2.21 libraries. One of the inconveniences of Gtk is getting and setting widget style settings which are considered to be set globally by the desktop style settings and not for the programmer to tinker around with. Needless to say, there are times when different defaults are preferred, largely to draw the users attention to 'something a bit different'. The function gtk_widget_modify_font is a convenience function to set the widget basefont as shown in this snippet from the button.c module, if ( options[baseFontIdx].status == GNOCL_STATUS_CHANGED ) { GtkWidget *label; label = gnoclFindChild ( GTK_WIDGET ( para->button ), GTK_TYPE_LABEL ); PangoFontDescription *font_desc = pango_font_description_from_string ( Tcl_GetString ( options[baseFontIdx].val.obj ) ); gtk_widget_modify_font ( GTK_WIDGET ( label ), font_desc ); pango_font_description_free ( font_desc ); } Unfortunately, there's no d...

Gnocl -the Tcl/Gtk Bindings

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