108 lines
2.8 KiB
Ruby
108 lines
2.8 KiB
Ruby
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#!/usr/bin/env ruby
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=begin
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bindings.rb - Ruby/GTK sample script.
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Copyright (c) 2002-2006 Ruby-GNOME2 Project Team
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This program is licenced under the same licence as Ruby-GNOME2.
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$Id: bindings.rb,v 1.7 2006/06/17 13:18:12 mutoh Exp $
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=end
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=begin
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Usage:
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bindings.rb <filename>
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Following key bindings are effective in the TextView area.
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<space> : scroll down by one page
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<backspace> : scroll up by one page
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j : move cursor donw by one line
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k : move cursor up by one line
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clicking buttons cause following effect
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"space" : same as pressing <space> in text view area.
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"back_space" : same as pressing <backspace> in text view area.
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"cancel j/k" : disable 'j' and 'k' binding
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=end
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require 'gtk2'
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class Pager < Gtk::TextView
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type_register
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# widget's key binding can be defined like this
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binding_set.add_signal(Gdk::Keyval::GDK_space, 0,
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"move_cursor",
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Gtk::MOVEMENT_PAGES, 1, false)
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binding_set.add_signal(Gdk::Keyval::GDK_BackSpace, 0,
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"move_cursor",
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Gtk::MOVEMENT_PAGES, -1, false)
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def initialize(path)
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@path = path
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super()
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@buffer = self.buffer
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load
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set_editable(false)
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set_size_request(400, 400)
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end
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def load
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open(@path).read.each_line do |line|
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@buffer.insert_at_cursor(line)
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end
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@buffer.place_cursor(@buffer.start_iter)
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end
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end
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path = ARGV[0] || __FILE__
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window = Gtk::Window.new
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window.name = "pager_window"
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sw = Gtk::ScrolledWindow.new
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vbox = Gtk::VBox.new
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hbox = Gtk::HBox.new
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pager = Pager.new(path)
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hbox.add(button1 = Gtk::Button.new("space"))
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hbox.add(button2 = Gtk::Button.new("back_space"))
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hbox.add(button3 = Gtk::Button.new("cancel j/k"))
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button1.signal_connect("clicked") do
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Pager.binding_set.activate(Gdk::Keyval::GDK_space, 0, pager)
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end
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button2.signal_connect("clicked") do
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pager.bindings_activate(Gdk::Keyval::GDK_BackSpace, 0)
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end
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# Key bindings can be attached to any widget by
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# Gtk::BindingSet#add_path
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# see RC Files section of GTK+ documentation for more detail.
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bset = Gtk::BindingSet.new("j_and_k")
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bset.add_signal(Gdk::Keyval::GDK_j, 0,
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"move_cursor",
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Gtk::MOVEMENT_DISPLAY_LINES, 1, false)
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bset.add_signal(Gdk::Keyval::GDK_k, 0,
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"move_cursor",
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Gtk::MOVEMENT_DISPLAY_LINES, -1, false)
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bset.add_path(Gtk::PathType::WIDGET, "pager_window.*.Pager",
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Gtk::PathPriorityType::APPLICATION)
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button3.signal_connect("clicked") do
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bset.entry_clear(Gdk::Keyval::GDK_j, 0)
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bset.entry_clear(Gdk::Keyval::GDK_k, 0)
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end
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sw.add(pager)
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vbox.add(hbox).add(sw)
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window.add(vbox)
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window.show_all
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pager.grab_focus
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window.signal_connect("destroy") { Gtk.main_quit }
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Gtk.main
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