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=begin
eventbox.rb - Ruby/GTK sample script.
Copyright (c) 2015-2020 Ruby-GNOME Project Team
This program is licenced under the same licence as Ruby-GNOME.
=end
# https://developer.gnome.org/gtk3/unstable/GtkEventBox.html
# https://developer.gnome.org/gtk3/stable/GtkImage.html
# Gtk::EventBox are widgets container used to catch events for widgets that
# do not have their own window (Gdk::Window) like Gtk::Image for example.
require "gtk3"
window = Gtk::Window.new("Event Box example")
surface = Cairo::ImageSurface.new(Cairo::FORMAT_ARGB32, 265, 95)
cr = Cairo::Context.new(surface)
r1 = [10, 10, 75, 75]
r2 = [95, 10, 75, 75]
r3 = [180, 10, 75, 75]
cr.set_source_rgb(1, 0, 0)
cr.rectangle(*r1)
cr.fill
cr.set_source_rgb(0, 1, 0)
cr.rectangle(*r2)
cr.fill
cr.set_source_rgb(0, 0, 1)
cr.rectangle(*r3)
cr.fill
image = Gtk::Image.new(
pixbuf: surface.to_pixbuf(src_x: 0, src_y: 0, width: 265, height: 95)
)
event_box = Gtk::EventBox.new
event_box.add(image)
event_box.signal_connect "button-press-event" do |_widget, event|
if event.y >= 10 && event.y <= 85
if event.x >= 10 && event.x <= 85
puts "red x = #{event.x} \t y = #{event.y}"
elsif event.x >= 95 && event.x <= 180
puts "green x = #{event.x} \t y = #{event.y}"
elsif event.x >= 190 && event.x <= 255
puts "blue x = #{event.x} \t y = #{event.y}"
end
end
end
window.add(event_box)
window.show_all
window.signal_connect("delete-event") { Gtk.main_quit }
Gtk.main
|
