interface/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     @wxheader{wupdlock.h}
  12
  13     This tiny class prevents redrawing of a wxWindow during its
  14     lifetime by using wxWindow::Freeze and
  15     wxWindow::Thaw methods. It is typically used for creating
  16     automatic objects to temporarily suppress window updates before a batch of
  17     operations is performed:
  18
  19     @code
  20     void MyFrame::Foo()
  21         {
  22             m_text = new wxTextCtrl(this, ...);
  23
  24             wxWindowUpdateLocker noUpdates(m_text);
  25             m_text-AppendText();
  26             ... many other operations with m_text...
  27             m_text-WriteText();
  28         }
  29     @endcode
  30
  31     Using this class is easier and safer than calling
  32     wxWindow::Freeze and wxWindow::Thaw because you
  33     don't risk to forget calling the latter.
  34
  35     @library{wxbase}
  36     @category{FIXME}
  37 */
  38 class wxWindowUpdateLocker
  39 {
  40 public:
  41     /**
  42         Creates an object preventing the updates of the specified @e win. The
  43         parameter must be non-@NULL and the window must exist for longer than
  44         wxWindowUpdateLocker object itself.
  45     */
  46     wxWindowUpdateLocker(wxWindow* win);
  47
  48     /**
  49         Destructor reenables updates for the window this object is associated with.
  50     */
  51     ~wxWindowUpdateLocker();
  52 };
  53