interface/wx/wupdlock.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wupdlock.h
   3 // Purpose:     interface of wxWindowUpdateLocker
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxWindowUpdateLocker
  11
  12     This tiny class prevents redrawing of a wxWindow during its lifetime by using
  13     wxWindow::Freeze() and wxWindow::Thaw() methods.
  14
  15     It is typically used for creating automatic objects to temporarily suppress
  16     window updates before a batch of operations is performed:
  17
  18     @code
  19     void MyFrame::Foo()
  20         {
  21             m_text = new wxTextCtrl(this, ...);
  22
  23             wxWindowUpdateLocker noUpdates(m_text);
  24             m_text-AppendText();
  25             ... many other operations with m_text...
  26             m_text-WriteText();
  27         }
  28     @endcode
  29
  30     Using this class is easier and safer than calling wxWindow::Freeze() and
  31     wxWindow::Thaw() because you don't risk to forget calling the latter.
  32
  33     @library{wxbase}
  34     @category{misc}
  35 */
  36 class wxWindowUpdateLocker
  37 {
  38 public:
  39     /**
  40         Creates an object preventing the updates of the specified @e win.
  41         The parameter must be non-@NULL and the window must exist for longer than
  42         wxWindowUpdateLocker object itself.
  43     */
  44     wxWindowUpdateLocker(wxWindow* win);
  45
  46     /**
  47         Destructor reenables updates for the window this object is associated with.
  48     */
  49     ~wxWindowUpdateLocker();
  50 };
  51