| | 1 | \section{\class{wxScreenDC}}\label{wxscreendc} |
| | 2 | |
| | 3 | A wxScreenDC can be used to paint on the screen. |
| | 4 | This should normally be constructed as a temporary stack object; don't store |
| | 5 | a wxScreenDC object. |
| | 6 | |
| | 7 | \wxheading{Derived from} |
| | 8 | |
| | 9 | \helpref{wxDC}{wxdc} |
| | 10 | |
| | 11 | \wxheading{Include files} |
| | 12 | |
| | 13 | <wx/dcscreen.h> |
| | 14 | |
| | 15 | \wxheading{See also} |
| | 16 | |
| | 17 | \helpref{wxDC}{wxdc}, \helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxPaintDC}{wxpaintdc},\rtfsp |
| | 18 | \helpref{wxClientDC}{wxclientdc}, \helpref{wxWindowDC}{wxwindowdc} |
| | 19 | |
| | 20 | \latexignore{\rtfignore{\wxheading{Members}}} |
| | 21 | |
| | 22 | \membersection{wxScreenDC::wxScreenDC} |
| | 23 | |
| | 24 | \func{}{wxScreenDC}{\void} |
| | 25 | |
| | 26 | Constructor. |
| | 27 | |
| | 28 | \membersection{wxScreenDC::StartDrawingOnTop}\label{wxscreendcstartdrawingontop} |
| | 29 | |
| | 30 | \func{bool}{StartDrawingOnTop}{\param{wxWindow*}{ window}} |
| | 31 | |
| | 32 | \func{bool}{StartDrawingOnTop}{\param{wxRect*}{ rect = NULL}} |
| | 33 | |
| | 34 | Use this in conjunction with \helpref{EndDrawingOnTop}{wxscreendcenddrawingontop} to |
| | 35 | ensure that drawing to the screen occurs on top of existing windows. Without this, |
| | 36 | some window systems (such as X) only allow drawing to take place underneath |
| | 37 | other windows. |
| | 38 | |
| | 39 | By using the first form of this function, an application is specifying that |
| | 40 | the area that will be drawn on coincides with the given window. |
| | 41 | |
| | 42 | By using the second form, an application can specify an area of the screen |
| | 43 | which is to be drawn on. If NULL is passed, the whole screen is available. |
| | 44 | |
| | 45 | It is recommended that an area of the screen is specified because with large regions, |
| | 46 | flickering effects are noticeable when destroying the temporary transparent window used |
| | 47 | to implement this feature. |
| | 48 | |
| | 49 | You might use this pair of functions when implementing a drag feature, for example |
| | 50 | as in the \helpref{wxSplitterWindow}{wxsplitterwindow} implementation. |
| | 51 | |
| | 52 | \wxheading{Remarks} |
| | 53 | |
| | 54 | This function is probably obsolete since the X implementations |
| | 55 | allow drawing directly on the screen now. However, the fact that this |
| | 56 | function allows the screen to be refreshed afterwards, may be useful to |
| | 57 | some applications. |
| | 58 | |
| | 59 | \membersection{wxScreenDC::EndDrawingOnTop}\label{wxscreendcenddrawingontop} |
| | 60 | |
| | 61 | \func{bool}{EndDrawingOnTop}{\void} |
| | 62 | |
| | 63 | Use this in conjunction with \helpref{StartDrawingOnTop}{wxscreendcstartdrawingontop}. |
| | 64 | |
| | 65 | This function destroys the temporary window created to implement on-top drawing (X only). |
| | 66 | |
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