projects / wxWidgets.git / blame
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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 | ||
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10 | \wxheading{Include files} |
| 11 | ||
| 12 | <wx/event.h> | |
| 13 | ||
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14 | \wxheading{Event table macros} |
| 15 | ||
| 16 | To process an erase event, use this event handler macro to direct input to a member | |
| 17 | function that takes a wxEraseEvent argument. | |
| 18 | ||
| 19 | \twocolwidtha{7cm} | |
| 20 | \begin{twocollist}\itemsep=0pt | |
| 884360bc | 21 | \twocolitem{{\bf EVT\_ERASE\_BACKGROUND(func)}}{Process a wxEVT\_ERASE\_BACKGROUND event.} |
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22 | \end{twocollist}% |
| 23 | ||
| 24 | \wxheading{Remarks} | |
| 25 | ||
| 26 | If the {\bf m\_DC} member is non-NULL, draw into this device context. | |
| 27 | ||
| 28 | \wxheading{See also} | |
| 29 | ||
| 30 | \helpref{wxWindow::OnEraseBackground}{wxwindowonerasebackground}, \helpref{Event handling overview}{eventhandlingoverview} | |
| 31 | ||
| 32 | \latexignore{\rtfignore{\wxheading{Members}}} | |
| 33 | ||
| 34 | \membersection{wxEraseEvent::wxEraseEvent} | |
| 35 | ||
| 36 | \func{}{wxEraseEvent}{\param{int }{id = 0}, \param{wxDC* }{dc = NULL}} | |
| 37 | ||
| 38 | Constructor. | |
| 39 | ||
| 40 | \membersection{wxEraseEvent::m\_dc} | |
| 41 | ||
| 42 | \member{wxDC*}{m\_dc} | |
| 43 | ||
| 44 | The device context associated with the erase event (may be NULL). | |
| 45 | ||
| 46 | \membersection{wxEraseEvent::GetDC}\label{wxeraseeventgetdc} | |
| 47 | ||
| 48 | \constfunc{wxDC*}{GetDC}{\void} | |
| 49 | ||
| 50 | Returns the device context to draw into. If this is non-NULL, you should draw | |
| 51 | into it to perform the erase operation. | |
| 52 |