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# Copyright (c) 2016 Ruby-GNOME2 Project Team
# This program is licenced under the same licence as Ruby-GNOME2.
#
=begin
= Pango/Font Features
This demonstrates support for OpenType font features with
Pango attributes. The attributes can be used manually or
via Pango markup.
=end
class FontFeaturesDemo
def initialize(_main_window)
initialize_builder
initialize_widgets
builder_add_callback_symbols
update(@toggle, @entry, @font, @settings, @label)
end
def run
if !@window.visible?
@window.show_all
else
@window.destroy
end
@window
end
private
def initialize_builder
@builder = Gtk::Builder.new(:resource => "/font_features/font-features.ui")
end
def initialize_widgets
@window = @builder["window"]
@label = @builder["label"]
@settings = @builder["settings"]
@resetbutton = @builder["reset"]
@font = @builder["font"]
@numcasedefault = @builder["numcasedefault"]
@numspacedefault = @builder["numspacedefault"]
@fractiondefault = @builder["fractiondefault"]
@stack = @builder["stack"]
@entry = @builder["entry"]
@toggle = []
%w(kern liga dlig hlig clig smcp c2sc lnum onum pnum tnum frac afrc zero
nalt swsh calt hist salt ss01 ss02 ss03 ss04 ss05).each do |name|
@toggle << @builder[name]
end
@text = nil
end
def builder_add_callback_symbols
@builder.connect_signals do |name|
case name
when "reset"
reset_callback
when "update"
update_callback
when "switch_to_entry"
switch_to_entry_callback
when "switch_to_label"
switch_to_label_callback
when "entry_key_press"
entry_key_press_callback
end
end
end
def reset_callback
proc do
@numcasedefault.active = true
@numspacedefault.active = true
@fractiondefault.active = true
@toggle.each do |widget|
if widget.class != Gtk::RadioButton
widget.active = false
widget.sensitive = false
end
end
end
end
def update_callback
proc do
update(@toggle, @entry, @font, @settings, @label)
end
end
def switch_to_entry_callback
proc do
@text = @entry.text
@stack.visible_child_name = "entry"
end
end
def switch_to_label_callback
proc do
@text = nil
@stack.set_visible_child_name("label")
update(@toggle, @entry, @font, @settings, @label)
end
end
def entry_key_press_callback
proc do |_entry, event|
if event.keyval == Gdk::Keyval::KEY_Escape
@entry.text = @text
@text = nil
@stack.set_visible_child_name("label")
update(@toggle, @entry, @font, @settings, @label)
end
Gdk::Event::PROPAGATE
end
end
def update(toggle, entry, font, settings, label)
text = entry.text
font_desc = font.font
s = ""
has_feature = false
toggle.each do |widget|
next unless widget.sensitive?
if widget.class == Gtk::RadioButton
if widget.active?
s += ", " if has_feature
s += widget.builder_name
s += " 1"
has_feature = true
end
else
s += ", " if has_feature
s += widget.builder_name
s += widget.active? ? " 1" : " 0"
has_feature = true
end
end
font_settings = s
settings.text = font_settings
s = "<span font_desc='#{font_desc}' font_features='#{font_settings}'>#{text}</span>"
label.markup = s
end
end
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