Module: SleipnirAPI::FFI::User32

Extended by:
Base
Included in:
Process, Sleipnir
Defined in:
lib/sleipnir_api/ffi/user32.rb

Overview

:nodoc:

Constant Summary collapse

GW_HWNDFIRST = 
0
GW_HWNDLAST = 
1
GW_HWNDNEXT = 
2
GW_HWNDPREV = 
3

Class Method Summary collapse

Methods included from Base

define_ffi_entry

Class Method Details

.each_child_window(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 105

def each_child_window(hwnd)
  child = get_first_child(hwnd)
  if child
    yield child
    while child = get_next_sibling(child)
      yield child
    end
  end
end

.find_child_window_by_classname(root_hwnd, classname) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 123

def find_child_window_by_classname(root_hwnd, classname)
  w = list_window(root_hwnd).flatten
  w.find{|e| get_class_name(e) == classname}
end

.get_class_name(hwnd) ⇒ Object

Raises:



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# File 'lib/sleipnir_api/ffi/user32.rb', line 29

def get_class_name(hwnd)
  buf = "\0" * 255
  r = GetClassName(hwnd, buf, buf.length)
  raise Win32APIError, "GetClassName failed" if r.nil? or r.zero?
  buf[0...r]
end

.get_first_child(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 85

def get_first_child(hwnd)
  get_top_window(hwnd)
end

.get_first_sibling(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 89

def get_first_sibling(hwnd)
  get_window(hwnd, GW_HWNDFIRST)
end

.get_last_sibling(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 93

def get_last_sibling(hwnd)
  get_window(hwnd, GW_HWNDLAST)
end

.get_next_sibling(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 97

def get_next_sibling(hwnd)
  get_window(hwnd, GW_HWNDNEXT)
end

.get_prev_sibling(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 101

def get_prev_sibling(hwnd)
  get_window(hwnd, GW_HWNDPREV)
end

.get_top_window(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 67

def get_top_window(hwnd)
  r = GetTopWindow(hwnd)
  if r.nil? or r.zero?
    nil
  else
    r
  end
end

.get_window(hwnd, cmd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 76

def get_window(hwnd, cmd)
  r = GetWindow(hwnd, cmd)
  if r.nil? or r.zero?
    nil
  else
    r
  end
end

.get_window_process_id(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 46

def get_window_process_id(hwnd)
  get_window_thread_process_id(hwnd)[1]
end

.get_window_rect(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 60

def get_window_rect(hwnd)
  buf = [0, 0, 0, 0].pack("L4")
  GetWindowRect(hwnd, buf)
  buf.unpack("L4")
end

.get_window_thread_id(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 42

def get_window_thread_id(hwnd)
  get_window_thread_process_id(hwnd)[0]
end

.get_window_thread_process_id(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 36

def get_window_thread_process_id(hwnd)
  n = [0].pack("L")
  th = GetWindowThreadProcessId(hwnd, n)
  return [th, n.unpack("L")[0]]
end

.list_window(hwnd) ⇒ Object 



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# File 'lib/sleipnir_api/ffi/user32.rb', line 115

def list_window(hwnd)
  r = [hwnd]
  each_child_window(hwnd) {|child|
    r << list_window(child)
  }
  r
end

.with_window_dc(hwnd) ⇒ Object

Raises:



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# File 'lib/sleipnir_api/ffi/user32.rb', line 50

def with_window_dc(hwnd)
  hdc = GetWindowDC(hwnd)
  raise Win32APIError, "GetDC failed" if hdc.nil? or hdc.zero?
  begin
    yield hdc
  ensure
    ReleaseDC(hwnd, hdc)
  end
end