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GUI component interaction: Difference between revisions

GUI component interaction (view source)

Revision as of 13:24, 10 January 2021

30 bytes added ,  3 years ago
m
Minor changes.
m (Minor changes.)
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===Gtk3 (gintro)===
{{libheader|gintro}}
This is a translation of the GTk2Gtk2 version to Gtk3 using the higher level "gintro" bindings. The higher level is not really obvious in this small example, but, for instance, we are able to transmit to signal handlers a pure Nim Context“Context” object (managed by the GC). With the Gtk2 bindings, it would require to use unsafe addresses.
<lang Nim>import random, strutils
import gintro/[glib, gobject, gtk, gio]
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#---------------------------------------------------------------------------------------------------
 
proc onQuit(button: Button; winwindow: ApplicationWindow) =
winwindow.destroy()
 
#---------------------------------------------------------------------------------------------------
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## Activate the application.
 
let winwindow = app.newApplicationWindow()
winwindow.setTitle("Component interaction")
 
let content = newBox(Orientation.vertical, 10)
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content.packStart(btnQuit, true, true, 0)
 
winwindow.setBorderWidth(5)
winwindow.add(content)
 
let context = Context(value: 0, entry: entry)
 
discard btnQuit.connect("clicked", onQuit, winwindow)
discard btnIncr.connect("clicked", onIncr, context)
discard btnRand.connect("clicked", onRand, context)
discard entry.connect("changed", onEntryChange, context)
 
winwindow.showAll()
 
#———————————————————————————————————————————————————————————————————————————————————————————————————
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