docs/latex/wx/eraseevt.tex

   1 \section{\class{wxEraseEvent}}\label{wxeraseevent}
   2
   3 An erase event is sent when a window's background needs to be repainted.
   4
   5 \wxheading{Derived from}
   6
   7 \helpref{wxEvent}{wxevent}\\
   8 \helpref{wxObject}{wxobject}
   9
  10 \wxheading{Event table macros}
  11
  12 To process an erase event, use this event handler macro to direct input to a member
  13 function that takes a wxEraseEvent argument.
  14
  15 \twocolwidtha{7cm}
  16 \begin{twocollist}\itemsep=0pt
  17 \twocolitem{{\bf EVT\_ERASE(func)}}{Process a wxEVT\_ERASE\_BACKGROUND event.}
  18 \end{twocollist}%
  19
  20 \wxheading{Remarks}
  21
  22 If the {\bf m\_DC} member is non-NULL, draw into this device context.
  23
  24 \wxheading{See also}
  25
  26 \helpref{wxWindow::OnEraseBackground}{wxwindowonerasebackground}, \helpref{Event handling overview}{eventhandlingoverview}
  27
  28 \latexignore{\rtfignore{\wxheading{Members}}}
  29
  30 \membersection{wxEraseEvent::wxEraseEvent}
  31
  32 \func{}{wxEraseEvent}{\param{int }{id = 0}, \param{wxDC* }{dc = NULL}}
  33
  34 Constructor.
  35
  36 \membersection{wxEraseEvent::m\_dc}
  37
  38 \member{wxDC*}{m\_dc}
  39
  40 The device context associated with the erase event (may be NULL).
  41
  42 \membersection{wxEraseEvent::GetDC}\label{wxeraseeventgetdc}
  43
  44 \constfunc{wxDC*}{GetDC}{\void}
  45
  46 Returns the device context to draw into. If this is non-NULL, you should draw
  47 into it to perform the erase operation.
  48