Class: WindowGeometry

Inherits:
Object
  • Object
show all
Defined in:
lib/window_geometry.rb,
lib/window_geometry/x.rb,
lib/window_geometry/version.rb

Defined Under Namespace

Modules: X, X11

Constant Summary collapse

VERSION = 
"0.1.0"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ WindowGeometry

Returns a new instance of WindowGeometry.



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# File 'lib/window_geometry.rb', line 11

def initialize
  @display = X::Display.new
  @root = @display.default_root_window
end

Class Method Details

.start ⇒ Object 



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# File 'lib/window_geometry.rb', line 7

def self.start
  self.new.start
end

Instance Method Details

#display_osd ⇒ Object 



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# File 'lib/window_geometry.rb', line 96

def display_osd
  @osd.map_window
  @osd.clear
  @gc.draw_string(10, 30, @osd_str)
  @osd.move_window(@osd_x, @osd_y)
  @display.flush
end

#start ⇒ Object 



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# File 'lib/window_geometry.rb', line 16

def start
  watch_window(@root)
  @root.select_input(X11::SUBSTRUCTURE_NOTIFY_MASK)
  @osd = @root.create_simple_window(100, 100, 200, 50, 0, 0, 0xe0e0e0)
  @osd.change_property(:_NET_WM_WINDOW_TYPE, X11::PROP_MODE_REPLACE, :_NET_WM_WINDOW_TYPE_NOTIFICATION)
  @osd.select_input(X11::EXPOSURE_MASK)
  @gc = @osd.create_gc
  @gc.set_background(0xe0e0e0)
  @gc.set_foreground(0)
  @gc.set_font(@display.load_font("fixed"))

  while true
    ev = @display.next_event
    case ev
    when X::CreateWindowEvent
      win = ev.window
      watch_window(win)
    when X::ExposeEvent
      display_osd if ev.window.id == @osd.id
    when X::ConfigureEvent
      win = ev.window
      hints = win.wm_normal_hints
      next if (hints.max_width == hints.min_width && hints.max_height == hints.min_height) || !win_title(win)
      width, height = ev.width, ev.height
      next if ev.x == 0 && ev.y == 0
      @osd_x = ev.x + ((ev.width - 200) / 2)
      @osd_y = ev.y + ((ev.height - 50) / 2)
      @osd_str = "#{ev.width} x #{ev.height} +#{ev.x}+#{ev.y}"
      if hints.width_inc > 0 && hints.height_inc > 0
        width -= hints.base_width
        height -= hints.base_height
        @osd_str += "  (#{width / hints.width_inc} x #{height / hints.height_inc})"
      end
      display_osd
      map_time = Time.now
      Thread.new do
        sleep 1
        if Time.now >= map_time + 1
          @osd.unmap_window
          @display.flush
        end
      end
    end
  end
end

#watch_resize_event(win) ⇒ Object 



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# File 'lib/window_geometry.rb', line 92

def watch_resize_event(win)
  win.select_input(X11::STRUCTURE_NOTIFY_MASK)
end

#watch_window(win) ⇒ Object 



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# File 'lib/window_geometry.rb', line 62

def watch_window(win)
  win.query_tree&.each do |w|
    if win_resizable?(w) && win_title(w)
      # p [win_class_name(w), win_name(w), win_title(w)]
      watch_resize_event(w)
      next
    end
    watch_window(w)
  end
end

#win_class_name(win) ⇒ Object 



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# File 'lib/window_geometry.rb', line 78

def win_class_name(win)
  class_hint = win.class_hint
  class_hint.class_name.null? ? nil : class_hint.class_name.to_s
end

#win_name(win) ⇒ Object 



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# File 'lib/window_geometry.rb', line 83

def win_name(win)
  class_hint = win.class_hint
  class_hint.name.null? ? nil : class_hint.name.to_s
end

#win_resizable?(win) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/window_geometry.rb', line 73

def win_resizable?(win)
  hint = win.wm_normal_hints
  hint.max_width != hint.min_width || hint.max_height != hint.min_height
end

#win_title(win) ⇒ Object 



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# File 'lib/window_geometry.rb', line 88

def win_title(win)
  win.wm_name
end