Module: Win32::CaptureIE::FFI::User32

Extended by:
Base
Included in:
Browser, ScreenCaptor, Window
Defined in:
lib/win32/capture_ie/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/win32/capture_ie/ffi/user32.rb', line 90

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

.get_class_name(hwnd) ⇒ Object

Raises:



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# File 'lib/win32/capture_ie/ffi/user32.rb', line 28

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/win32/capture_ie/ffi/user32.rb', line 70

def get_first_child(hwnd)
  get_top_window(hwnd)
end

.get_first_sibling(hwnd) ⇒ Object 



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# File 'lib/win32/capture_ie/ffi/user32.rb', line 74

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

.get_last_sibling(hwnd) ⇒ Object 



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# File 'lib/win32/capture_ie/ffi/user32.rb', line 78

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

.get_next_sibling(hwnd) ⇒ Object 



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# File 'lib/win32/capture_ie/ffi/user32.rb', line 82

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

.get_prev_sibling(hwnd) ⇒ Object 



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# File 'lib/win32/capture_ie/ffi/user32.rb', line 86

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

.get_top_window(hwnd) ⇒ Object 



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# File 'lib/win32/capture_ie/ffi/user32.rb', line 52

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/win32/capture_ie/ffi/user32.rb', line 61

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

.get_window_rect(hwnd) ⇒ Object 



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# File 'lib/win32/capture_ie/ffi/user32.rb', line 45

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

.with_window_dc(hwnd) ⇒ Object

Raises:



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# File 'lib/win32/capture_ie/ffi/user32.rb', line 35

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