Class: Gtk2_window_settings

Inherits:
Object
  • Object
show all
Defined in:
lib/gtk2_window_settings.rb

Overview

A class that remembers settings for a given window and restrores them by using a given database.

Constant Summary collapse

ALLOWED_ARGS =

Allowed given arguments.

[:db, :name, :window]
DB_SCHEMA =

How the database should be made to look like.

{
  "tables" => {
    "Gtk2_window_settings" => {
      "columns" => [
        {"name" => "id", "type" => "int", "autoincr" => true, "primarykey" => true},
        {"name" => "name", "type" => "text"},
        {"name" => "width", "type" => "int"},
        {"name" => "height", "type" => "int"},
        {"name" => "pos_x", "type" => "int"},
        {"name" => "pos_y", "type" => "int"},
        {"name" => "pos_registered", "type" => "int"}
      ],
      "indexes" => [
        "name"
      ]
    }
  }
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ Gtk2_window_settings

Returns a new instance of Gtk2_window_settings.



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# File 'lib/gtk2_window_settings.rb', line 29

def initialize(args)
  #Check arguments and initialize variables.
  @args = args
  @args.each do |key, val|
    raise "Invalid argument: '#{key}'." if !ALLOWED_ARGS.include?(key)
  end
  
  @db = @args[:db]
  @window = @args[:window]
  @name = @args[:name]
  
  #Check structure of database and load window-settings.
  Knj::Db::Revision.new.init_db("db" => @db, "schema" => DB_SCHEMA)
  
  if @data = @db.single(:Gtk2_window_settings, :name => @name)
    @id = @data[:id]
  else
    @id = @db.insert(:Gtk2_window_Settings, {:name => @name}, :return_id => true)
    @data = @db.single(:Gtk2_window_settings, :id => @id)
  end
  
  #Resize and move window to saved size (if saved).
  @window.resize(@data[:width].to_i, @data[:height].to_i) if @data[:width].to_i > 0 and @data[:height].to_i > 0
  @window.move(@data[:pos_x].to_i, @data[:pos_y].to_i) if @data[:pos_registered].to_i == 1
  
  #Initialize events for the window.
  @window.signal_connect_after(:size_request, &self.method(:on_window_size_request))
  @window.signal_connect(:configure_event, &self.method(:on_window_moved))
end

Instance Attribute Details

#window ⇒ Object (readonly)

The window that this objects controls.



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# File 'lib/gtk2_window_settings.rb', line 27

def window
  @window
end

Instance Method Details

#on_window_moved(*args) ⇒ Object

Called when the window is moved on the screen. Writes the new size to the database.



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# File 'lib/gtk2_window_settings.rb', line 79

def on_window_moved(*args)
  Gtk.timeout_remove(@moved_timeout) if @moved_timeout
  
  @moved_timeout = Gtk.timeout_add(500) do
    @moved_timeout = nil
    
    if @window and !@window.destroyed?
      pos = @window.position
      @db.update(:Gtk2_window_settings, {:pos_x => pos[0], :pos_y => pos[1], :pos_registered => 1}, {:id => @id}) if pos[0].to_i >= 0 and pos[1].to_i >= 0
    end
    
    false
  end
  
  #If false isnt returned the event might be canceled, which can lead to very buggy behaviour.
  return false
end

#on_window_size_request(*args) ⇒ Object

Called when the window is resized. Writes the new size to the database.



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# File 'lib/gtk2_window_settings.rb', line 60

def on_window_size_request(*args)
  Gtk.timeout_remove(@size_request_timeout) if @size_request_timeout
  
  @size_request_timeout = Gtk.timeout_add(500) do
    @size_request_timeout = nil
    
    if @window and !@window.destroyed?
      size = @window.size
      @db.update(:Gtk2_window_settings, {:width => size[0], :height => size[1]}, {:id => @id}) if size[0].to_i > 0 and size[1].to_i > 0
    end
    
    false
  end
  
  #If false isnt returned the event might be canceled, which can lead to very buggy behaviour.
  return false
end