1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
<HTML>
<head><title>wxEraseEvent</title></head>
<BODY BGCOLOR=#FFFFFF>
<A NAME="wxeraseevent"></A><CENTER>
<A HREF="wx.htm"><img align=center src="contents.gif" BORDER=0 ALT="Contents"></A> <A HREF="wx22.htm#classref"><img align=center src="up.gif" BORDER=0 ALT="Up"></A> <A HREF="wx82.htm#wxdroptarget"><img align=center src="back.gif" BORDER=0 ALT="Previous"></A> <A HREF="wx84.htm#wxevent"><img align=center src="forward.gif" BORDER=0 ALT="Next"></A> </CENTER><HR>
<H2>wxEraseEvent</H2>
<P>
An erase event is sent when a window's background needs to be repainted.<P>
<B><FONT COLOR="#FF0000">Derived from</FONT></B><P>
<A HREF="wx84.htm#wxevent">wxEvent</A><BR>
<A HREF="wx158.htm#wxobject">wxObject</A><P>
<B><FONT COLOR="#FF0000">Include files</FONT></B><P>
<wx/event.h><P>
<B><FONT COLOR="#FF0000">Event table macros</FONT></B><P>
To process an erase event, use this event handler macro to direct input to a member
function that takes a wxEraseEvent argument.<P>
<TABLE>
<TR><TD VALIGN=TOP>
<B>EVT_ERASE_BACKGROUND(func)</B>
</TD>
<TD VALIGN=TOP>
Process a wxEVT_ERASE_BACKGROUND event.
</TD></TR>
</TABLE>
<B><FONT COLOR="#FF0000">Remarks</FONT></B><P>
If the <B>m_DC</B> member is non-NULL, draw into this device context.<P>
<B><FONT COLOR="#FF0000">See also</FONT></B><P>
<A HREF="wx260.htm#wxwindowonerasebackground">wxWindow::OnEraseBackground</A>, <A HREF="wx299.htm#eventhandlingoverview">Event handling overview</A><P>
<B><FONT COLOR="#FF0000">Members</FONT></B><P>
<A HREF="#topic336">wxEraseEvent::wxEraseEvent</A><BR>
<A HREF="#topic337">wxEraseEvent::m_dc</A><BR>
<A HREF="#wxeraseeventgetdc">wxEraseEvent::GetDC</A><BR>
<P>
<HR>
<A NAME="topic336"></A>
<H3>wxEraseEvent::wxEraseEvent</H3>
<P>
<B></B> <B>wxEraseEvent</B>(<B>int </B><I>id = 0</I>, <B>wxDC* </B><I>dc = NULL</I>)<P>
Constructor.<P>
<HR>
<A NAME="topic337"></A>
<H3>wxEraseEvent::m_dc</H3>
<P>
wxDC* m_dc<P>
The device context associated with the erase event (may be NULL).<P>
<HR>
<A NAME="wxeraseeventgetdc"></A>
<H3>wxEraseEvent::GetDC</H3>
<P>
<B>wxDC*</B> <B>GetDC</B>() <B>const</B><P>
Returns the device context to draw into. If this is non-NULL, you should draw
into it to perform the erase operation.<P>
</BODY></HTML>
|
