392751754e
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29316 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
67 lines
2.2 KiB
TeX
67 lines
2.2 KiB
TeX
\section{\class{wxScreenDC}}\label{wxscreendc}
|
|
|
|
A wxScreenDC can be used to paint on the screen.
|
|
This should normally be constructed as a temporary stack object; don't store
|
|
a wxScreenDC object.
|
|
|
|
\wxheading{Derived from}
|
|
|
|
\helpref{wxDC}{wxdc}
|
|
|
|
\wxheading{Include files}
|
|
|
|
<wx/dcscreen.h>
|
|
|
|
\wxheading{See also}
|
|
|
|
\helpref{wxDC}{wxdc}, \helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxPaintDC}{wxpaintdc},\rtfsp
|
|
\helpref{wxClientDC}{wxclientdc}, \helpref{wxWindowDC}{wxwindowdc}
|
|
|
|
\latexignore{\rtfignore{\wxheading{Members}}}
|
|
|
|
\membersection{wxScreenDC::wxScreenDC}\label{wxscreendcctor}
|
|
|
|
\func{}{wxScreenDC}{\void}
|
|
|
|
Constructor.
|
|
|
|
\membersection{wxScreenDC::StartDrawingOnTop}\label{wxscreendcstartdrawingontop}
|
|
|
|
\func{bool}{StartDrawingOnTop}{\param{wxWindow*}{ window}}
|
|
|
|
\func{bool}{StartDrawingOnTop}{\param{wxRect*}{ rect = NULL}}
|
|
|
|
Use this in conjunction with \helpref{EndDrawingOnTop}{wxscreendcenddrawingontop} to
|
|
ensure that drawing to the screen occurs on top of existing windows. Without this,
|
|
some window systems (such as X) only allow drawing to take place underneath
|
|
other windows.
|
|
|
|
By using the first form of this function, an application is specifying that
|
|
the area that will be drawn on coincides with the given window.
|
|
|
|
By using the second form, an application can specify an area of the screen
|
|
which is to be drawn on. If NULL is passed, the whole screen is available.
|
|
|
|
It is recommended that an area of the screen is specified because with large regions,
|
|
flickering effects are noticeable when destroying the temporary transparent window used
|
|
to implement this feature.
|
|
|
|
You might use this pair of functions when implementing a drag feature, for example
|
|
as in the \helpref{wxSplitterWindow}{wxsplitterwindow} implementation.
|
|
|
|
\wxheading{Remarks}
|
|
|
|
This function is probably obsolete since the X implementations
|
|
allow drawing directly on the screen now. However, the fact that this
|
|
function allows the screen to be refreshed afterwards, may be useful to
|
|
some applications.
|
|
|
|
\membersection{wxScreenDC::EndDrawingOnTop}\label{wxscreendcenddrawingontop}
|
|
|
|
\func{bool}{EndDrawingOnTop}{\void}
|
|
|
|
Use this in conjunction with \helpref{StartDrawingOnTop}{wxscreendcstartdrawingontop}.
|
|
|
|
This function destroys the temporary window created to implement on-top drawing (X only).
|
|
|