Class: Win32::Screenshot::Util

Inherits:
Object
  • Object
show all
Defined in:
lib/win32/util.rb

Class Method Summary collapse

Class Method Details

.all_desktop_windows ⇒ Object 



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# File 'lib/win32/util.rb', line 6

def all_desktop_windows
  titles = []
  window_callback = FFI::Function.new(:bool, [ :long, :pointer ], { :convention => :stdcall }) do |hwnd, param|
    titles << [window_title(hwnd), hwnd]
    true
  end

  BitmapMaker.enum_windows(window_callback, nil)
  titles
end

.dimensions_for(hwnd) ⇒ Object 



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# File 'lib/win32/util.rb', line 79

def dimensions_for(hwnd)
  rect = [0, 0, 0, 0].pack('L4')
  BitmapMaker.client_rect(hwnd, rect)
  _, _, width, height = rect.unpack('L4')
  return width, height
end

.get_info(hwnd) ⇒ Object 



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# File 'lib/win32/util.rb', line 45

def get_info hwnd
  {:title => window_title(hwnd), 
  :class => window_class(hwnd), 
  :dimensions => dimensions_for(hwnd), 
  :starting_coordinates => location_of(hwnd)
  }
end

.location_of(hwnd) ⇒ Object 



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# File 'lib/win32/util.rb', line 72

def location_of(hwnd)
  rect = [0, 0, 0, 0].pack('L4')
  BitmapMaker.window_rect(hwnd, rect)
  x, y, width, height = rect.unpack('L4')
  return x, y
end

.window_class(hwnd) ⇒ Object 



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# File 'lib/win32/util.rb', line 60

def window_class hwnd
  title = FFI::MemoryPointer.new :char, 100
  BitmapMaker.class_name(hwnd, title, 99)
  title.read_string
end

.window_hwnd(title_query) ⇒ Object 



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# File 'lib/win32/util.rb', line 66

def window_hwnd(title_query)
  hwnd = BitmapMaker.hwnd(title_query)
  raise "window with title '#{title_query}' was not found!" unless hwnd
  hwnd
end

.window_process_id(hwnd) ⇒ Object 



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# File 'lib/win32/util.rb', line 86

def window_process_id(hwnd)
  BitmapMaker.get_process_id_from_hwnd(hwnd)
end

.window_title(hwnd) ⇒ Object 



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# File 'lib/win32/util.rb', line 53

def window_title hwnd
  title_length = BitmapMaker.window_text_length(hwnd) + 1
  title = FFI::MemoryPointer.new :char, title_length
  BitmapMaker.window_text(hwnd, title, title_length)
  title.read_string
end

.windows_hierarchy(with_info = false) ⇒ Object

just returns a long list of hwnd’s… unless with_info is true then it will return all hwnds with full info about each window



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# File 'lib/win32/util.rb', line 20

def windows_hierarchy with_info = false          
  all = {}
  desktop_hwnd = BitmapMaker.desktop_window
  root = {:hwnd => desktop_hwnd, :children => []}
  root.merge!(get_info(desktop_hwnd)) if with_info
  parents = []
  parents << root
  window_callback = FFI::Function.new(:bool, [ :long, :pointer ], { :convention => :stdcall }) do |hwnd, param|
    # this is a child of the most recent parent
    myself = {:hwnd => hwnd, :children => []}
    myself.merge!(get_info(hwnd)) if with_info
    parents[-1][:children] << myself
    parents << myself
    if !all[hwnd]
      all[hwnd] = true
      BitmapMaker.enum_child_windows(hwnd, window_callback, nil)
    end
    
    parents.pop
    true
  end
  BitmapMaker.enum_child_windows(desktop_hwnd, window_callback, nil)
  root
end