Correct wxObjectDataPtr<> assignment from *T to not increase the ref count

[wxWidgets.git] / docs / latex / wx / mediactrl.tex

diff --git a/docs/latex/wx/mediactrl.tex b/docs/latex/wx/mediactrl.tex
index 155652ae6fd9e391f441ceca32f01e9984cef913..4380d9790fc2acc53a573ca081ab3c576f197f36 100644 (file)
--- a/docs/latex/wx/mediactrl.tex
+++ b/docs/latex/wx/mediactrl.tex
@@ -11,23 +11,35 @@
 
 \section{\class{wxMediaCtrl}}\label{wxmediactrl}
 
 
 \section{\class{wxMediaCtrl}}\label{wxmediactrl}
 

-wxMediaCtrl is a class that allows a way to convieniently display types of 
+wxMediaCtrl is a class for displaying types of 

 media, such as videos, audio files, natively through native codecs.
 
 wxMediaCtrl uses native backends to render media, for example on Windows
 there is a ActiveMovie/DirectShow backend, and on Macintosh there is a 
 QuickTime backend.
 
 media, such as videos, audio files, natively through native codecs.
 
 wxMediaCtrl uses native backends to render media, for example on Windows
 there is a ActiveMovie/DirectShow backend, and on Macintosh there is a 
 QuickTime backend.
 

+\wxheading{See also}
+
+\helpref{wxMediaEvent}{wxmediaevent}
+

 \wxheading{Derived from}
 
 \wxheading{Derived from}
 

-\helpref{wxControl}{wxcontrol}
+\helpref{wxControl}{wxcontrol}\\
+\helpref{wxWindow}{wxwindow}\\
+\helpref{wxEvtHandler}{wxevthandler}\\
+\helpref{wxObject}{wxobject}

 
 \wxheading{Include files}
 
 <wx/mediactrl.h>
 
 
 \wxheading{Include files}
 
 <wx/mediactrl.h>
 

+\wxheading{Library}
+
+\helpref{wxMedia}{librarieslist}
+

 \latexignore{\rtfignore{\wxheading{Members}}}
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 

+

 \membersection{Rendering media}\label{renderingmediawxmediactrl}
 
 Depending upon the backend, wxMediaCtrl can render
 \membersection{Rendering media}\label{renderingmediawxmediactrl}
 
 Depending upon the backend, wxMediaCtrl can render


@@ -48,6 +60,7 @@ capabilities of the backend.  For example, QuickTime cannot set
 the playback rate of certain streaming media - while DirectShow is 
 slightly more flexible in that regard.
 
 the playback rate of certain streaming media - while DirectShow is 
 slightly more flexible in that regard.
 

+

 \membersection{Operation}\label{operationwxmediactrl}
 
 When wxMediaCtrl plays a file, it plays until the stop position
 \membersection{Operation}\label{operationwxmediactrl}
 
 When wxMediaCtrl plays a file, it plays until the stop position


@@ -86,6 +99,50 @@ because some streams are not seekable, and when stop is called
 on them they return to the beginning, thus wxMediaCtrl tries
 to keep consistant for all types of media.
 
 on them they return to the beginning, thus wxMediaCtrl tries
 to keep consistant for all types of media.
 

+Note that when changing the state of the media through Play()
+and other methods, the media may not actually be in the
+wxMEDIASTATE\_PLAYING, for example. If you are relying on the
+media being in certain state catch the event relevant to the state.
+See \helpref{wxMediaEvent}{wxmediaevent} for the kinds of events
+that you can catch.
+
+
+\membersection{Video size}\label{videosizewxmediactrl}
+
+By default, wxMediaCtrl will scale the size of the video to the
+requested amount passed to either it's constructor or Create().
+After calling Load or performing an equivilant operation, you
+can subsequently obtain the "real" size of the video (if there
+is any) by calling GetBestSize(). Note that the actual result
+on the display will be slightly different when ShowPlayerControls
+is activated and the actual video size will be less then
+specified due to the extra controls provided by the native toolkit.
+In addition, the backend may modify GetBestSize() to include the
+size of the extra controls - so if you want the real size of the
+video just disable ShowPlayerControls().
+
+The idea with setting GetBestSize to the size of the video is
+that GetBestSize is a wxWindow-derived function that is called
+when sizers on a window recalculate. What this means is that
+if you use sizers by default the video will show in it's
+original size without any extra assistance needed from the user.
+
+
+\membersection{Player controls}\label{playercontrolswxmediactrl}
+
+Normally, when you use wxMediaCtrl it is just a window for the video to
+play in.  However, some toolkits have their own media player interface.
+For example, QuickTime generally has a bar below the video with a slider.
+A special feature available to wxMediaCtrl, you can use the toolkit's interface instead of
+making your own by using the \helpref{ShowPlayerControls()}{wxmediactrlshowplayercontrols}
+function.  There are several options for the flags parameter, with
+the two general flags being wxMEDIACTRLPLAYERCONTROLS\_NONE which turns off
+the native interface, and wxMEDIACTRLPLAYERCONTROLS\_DEFAULT which lets
+wxMediaCtrl decide what native controls on the interface. Be sure to review
+the caveats outlined in \helpref{Video size}{videosizewxmediactrl} before
+doing so.
+
+

 \membersection{Choosing a backend}\label{choosingbackendwxmediactrl}
 
 Generally, you should almost certainly leave this part up to
 \membersection{Choosing a backend}\label{choosingbackendwxmediactrl}
 
 Generally, you should almost certainly leave this part up to


@@ -99,17 +156,48 @@ The following are valid backend identifiers -
 \twocolwidtha{7cm}
 \begin{twocollist}\itemsep=0pt
 \twocolitem{{\bf wxMEDIABACKEND\_DIRECTSHOW}}{ 
 \twocolwidtha{7cm}
 \begin{twocollist}\itemsep=0pt
 \twocolitem{{\bf wxMEDIABACKEND\_DIRECTSHOW}}{ 

-Use ActiveMovie/DirectShow.  Requires wxUSE\_DIRECTSHOW to be 
-enabled, requires linkage with the static library strmiids.lib,
-and is available on Windows Only.}
+Use ActiveMovie/DirectShow.  Uses the native ActiveMovie
+(I.E. DirectShow) control. Default backend on Windows and
+supported by nearly all Windows versions, even some
+Windows CE versions. May display a windows media player
+logo while inactive. }

 \twocolitem{{\bf wxMEDIABACKEND\_QUICKTIME}}{
 \twocolitem{{\bf wxMEDIABACKEND\_QUICKTIME}}{

-Use QuickTime.  Windows and Mac Only. NOTE: On Mac Systems lower than OSX 10.2 this defaults to emulating window positioning and suffers from several bugs, including not working correctly embedded in a wxNotebook. }
-\twocolitem{{\bf wxMEDIABACKEND\_MCI}}{
-Use Media Command Interface.  Windows Only. }
+Use QuickTime.  Mac Only.
+WARNING: May not working correctly embedded in a wxNotebook.
+}

 \twocolitem{{\bf wxMEDIABACKEND\_GSTREAMER}}{
 \twocolitem{{\bf wxMEDIABACKEND\_GSTREAMER}}{

-Use GStreamer.  Unix Only. }
+Use GStreamer.  Unix Only. Requires GStreamer 0.8 along
+with at the very least the xvimagesink, xoverlay, and
+gst-play modules of gstreamer to function. You need the correct
+modules to play the relavant files, for example the mad module
+to play mp3s, etc.}
+\twocolitem{{\bf wxMEDIABACKEND\_WMP10}}{
+Uses Windows Media Player 10 (Windows only) - works on mobile
+machines with Windows Media Player 10 and desktop machines with
+either Windows Media Player 9 or 10
+}

 \end{twocollist}
 
 \end{twocollist}
 

+Note that other backends such as wxMEDIABACKEND\_MCI can now be
+found at wxCode.
+
+\membersection{Creating a backend}\label{creatingabackendwxmediactrl}
+
+Creating a backend for wxMediaCtrl is a rather simple process. Simply derive
+from wxMediaBackendCommonBase and implement the methods you want. The methods
+in wxMediaBackend correspond to those in wxMediaCtrl except for CreateControl
+which does the actual creation of the control, in cases where a custom control
+is not needed you may simply call wxControl::Create.
+
+You need to make sure to use the DECLARE\_CLASS and IMPLEMENT\_CLASS macros.
+
+The only real tricky part is that you need to make sure the file in compiled
+in, which if there are just backends in there will not happen and you may need
+to use a force link hack (see http://www.wxwidgets.org/wiki/index.php/RTTI).
+
+This is a rather simple example of how to create a backend in the
+\helpref{wxActiveXContainer}{wxactivexcontainer} documentation.
+

 \membersection{wxMediaCtrl::wxMediaCtrl}\label{wxmediactrlwxmediactrl}
 
 \func{}{wxMediaCtrl}{\void}
 \membersection{wxMediaCtrl::wxMediaCtrl}\label{wxmediactrlwxmediactrl}
 
 \func{}{wxMediaCtrl}{\void}


@@ -119,8 +207,8 @@ of wxMediaCtrl.
 
 \func{}{wxMediaCtrl}{
         \param{wxWindow* }{parent}, 
 
 \func{}{wxMediaCtrl}{
         \param{wxWindow* }{parent}, 

-        \param{const wxString\& }{fileName = wxT("")},

         \param{wxWindowID }{id}, 
         \param{wxWindowID }{id}, 

+        \param{const wxString\& }{fileName = wxT("")},

         \param{const wxPoint\& }{pos = wxDefaultPosition}, 
         \param{const wxSize\& }{size = wxDefaultSize}, 
         \param{long }{style = 0}, 
         \param{const wxPoint\& }{pos = wxDefaultPosition}, 
         \param{const wxSize\& }{size = wxDefaultSize}, 
         \param{long }{style = 0}, 


@@ -147,8 +235,8 @@ wxMediaCtrl figure it out.}
 
 \func{bool}{Create}{
         \param{wxWindow* }{parent}, 
 
 \func{bool}{Create}{
         \param{wxWindow* }{parent}, 

-        \param{const wxString\& }{fileName = wxT("")},

         \param{wxWindowID }{id}, 
         \param{wxWindowID }{id}, 

+        \param{const wxString\& }{fileName = wxT("")},

         \param{const wxPoint\& }{pos = wxDefaultPosition}, 
         \param{const wxSize\& }{size = wxDefaultSize}, 
         \param{long }{style = 0}, 
         \param{const wxPoint\& }{pos = wxDefaultPosition}, 
         \param{const wxSize\& }{size = wxDefaultSize}, 
         \param{long }{style = 0}, 


@@ -173,25 +261,38 @@ wxMediaCtrl figure it out.}
 \docparam{name}{Window name.}
 
 
 \docparam{name}{Window name.}
 
 

-\membersection{wxMediaCtrl::Length}\label{wxmediactrlgetduration}
+\membersection{wxMediaCtrl::GetBestSize}\label{wxmediactrlgetbestsize}

 
 

-\func{wxFileOffset}{GetDuration}{\void}
+\func{wxSize}{GetBestSize}{\void}

 
 

-Obtains the length - the total amount of time the movie has in milliseconds.
+Obtains the best size relative to the original/natural size of the
+video, if there is any. See \helpref{Video size}{videosizewxmediactrl}
+for more information.

 
 
 
 

-\membersection{wxMediaCtrl::Tell}\label{wxmediactrlgetposition}
+\membersection{wxMediaCtrl::GetPlaybackRate}\label{wxmediactrlgetplaybackrate}

 
 

-\func{wxFileOffset}{GetPosition}{\void}
+\func{double}{GetPlaybackrate}{\void}

 
 

-Obtains the current position in time within the movie in milliseconds.
+Obtains the playback rate, or speed of the media. \tt{1.0} represents normal
+speed, while \tt{2.0} represents twice the normal speed of the media, for
+example. Not supported on the GStreamer (Unix) backend.
+Returns 0 on failure.
+
+
+\membersection{wxMediaCtrl::GetVolume}\label{wxmediactrlgetvolume}
+
+\func{double}{GetVolume}{\void}
+
+Gets the volume of the media from a 0.0 to 1.0 range. Note that due to rounding
+and other errors this may not be the exact value sent to SetVolume.

 
 
 \membersection{wxMediaCtrl::GetState}\label{wxmediactrlgetstate}
 
 \func{wxMediaCtrlState}{GetState}{\void}
 
 
 
 \membersection{wxMediaCtrl::GetState}\label{wxmediactrlgetstate}
 
 \func{wxMediaCtrlState}{GetState}{\void}
 

-Obtains the state the playback of the movie is in - 
+Obtains the state the playback of the media is in -

 
 \twocolwidtha{7cm}
 \begin{twocollist}\itemsep=0pt
 
 \twocolwidtha{7cm}
 \begin{twocollist}\itemsep=0pt


@@ -201,6 +302,13 @@ Obtains the state the playback of the movie is in -
 \end{twocollist}
 
 
 \end{twocollist}
 
 

+\membersection{wxMediaCtrl::Length}\label{wxmediactrllength}
+
+\func{wxFileOffset}{Length}{\void}
+
+Obtains the length - the total amount of time the movie has in milliseconds.
+
+

 \membersection{wxMediaCtrl::Load}\label{wxmediactrlload}
 
 \func{bool}{Load}{\param{const wxString\& }{fileName}}
 \membersection{wxMediaCtrl::Load}\label{wxmediactrlload}
 
 \func{bool}{Load}{\param{const wxString\& }{fileName}}


@@ -210,9 +318,31 @@ Loads the file that \tt{fileName} refers to.  Returns false if loading fails.
 
 \membersection{wxMediaCtrl::Load}\label{wxmediactrlloaduri}
 
 
 \membersection{wxMediaCtrl::Load}\label{wxmediactrlloaduri}
 

-\func{bool}{Load}{\param{const wxURI\& }{location}}
+\func{bool}{Load}{\param{const wxURI\& }{uri}}
+
+Loads the location that \tt{uri} refers to.  Note that this is very implementation-dependant, although HTTP URI/URLs are generally supported, for example. Returns false if loading fails.
+
+
+\membersection{wxMediaCtrl::Load}\label{wxmediactrlloaduriwithproxy}
+
+\func{bool}{Load}{\param{const wxURI\& }{uri}, \param{const wxURI\& }{proxy}}
+
+Loads the location that \tt{uri} refers to with the proxy \tt{proxy}. Not implemented on most backends so it should be called with caution. Returns false if loading fails.
+
+
+\membersection{wxMediaCtrl::LoadURI}\label{wxmediactrlloaduriliteral}
+
+\func{bool}{LoadURI}{\param{const wxURI\& }{uri}}
+
+Same as \helpref{Load}{wxmediactrlloaduri}. Kept for wxPython compatability.
+
+
+\membersection{wxMediaCtrl::LoadURIWithProxy}\label{wxmediactrlloaduriwithproxyliteral}
+
+\func{bool}{LoadURIWithProxy}{\param{const wxURI\& }{uri}, \param{const wxURI\& }{proxy}}
+
+Same as \helpref{Load}{wxmediactrlloaduriwithproxy}. Kept for wxPython compatability.

 
 

-Loads the url that \tt{location} refers to.  Returns false if loading fails.  

 
 \membersection{wxMediaCtrl::Pause}\label{wxmediactrlpause}
 
 
 \membersection{wxMediaCtrl::Pause}\label{wxmediactrlpause}
 


@@ -235,54 +365,66 @@ Resumes playback of the movie.
 Seeks to a position within the movie.
 
 
 Seeks to a position within the movie.
 
 

-\membersection{wxMediaCtrl::Stop}\label{wxmediactrlstop}
+\membersection{wxMediaCtrl::SetPlaybackRate}\label{wxmediactrlsetplaybackrate}

 
 

-\func{bool}{Stop}{\void}
+\func{bool}{SetPlaybackRate}{\param{double }{dRate}}

 
 

-Stops the media.
-
-See \helpref{Operation}{operationwxmediactrl} for an overview of how stopping works.
+Sets the playback rate, or speed of the media, to that referred by \tt{dRate}.
+\tt{1.0} represents normal speed, while \tt{2.0} represents twice the normal
+speed of the media, for example. Not supported on the GStreamer (Unix) backend.
+Returns true if successful.

 
 
 \membersection{wxMediaCtrl::SetVolume}\label{wxmediactrlsetvolume}
 
 \func{bool}{SetVolume}{\param{double }{dVolume}}
 
 
 
 \membersection{wxMediaCtrl::SetVolume}\label{wxmediactrlsetvolume}
 
 \func{bool}{SetVolume}{\param{double }{dVolume}}
 

-Sets the volume of the media from a 0.0 to 1.0 range.
+Sets the volume of the media from a 0.0 to 1.0 range to that referred
+by \tt{dVolume}.  \tt{1.0} represents full volume, while \tt{0.5}
+represents half (50 percent) volume, for example.  Note that this may not be
+exact due to conversion and rounding errors, although setting the volume to
+full or none is always exact. Returns true if successful.

 
 
 
 

-\membersection{wxMediaCtrl::GetVolume}\label{wxmediactrlgetvolume}
+\membersection{wxMediaCtrl::ShowPlayerControls}\label{wxmediactrlshowplayercontrols}

 
 

-\func{double}{GetVolume}{\void}
+\func{bool}{ShowPlayerControls}{\param{wxMediaCtrlPlayerControls }{flags = wxMEDIACTRLPLAYERCONTROLS\_DEFAULT}}

 
 

-Gets the volume of the media from a 0.0 to 1.0 range.
+A special feature to wxMediaCtrl. Applications using native toolkits such as
+QuickTime usually have a scrollbar, play button, and more provided to
+them by the toolkit. By default wxMediaCtrl does not do this. However, on
+the directshow and quicktime backends you can show or hide the native controls
+provided by the underlying toolkit at will using ShowPlayerControls. Simply
+calling the function with default parameters tells wxMediaCtrl to use the
+default controls provided by the toolkit. The function takes a
+\tt{wxMediaCtrlPlayerControls} enumeration as follows:

 
 

+\twocolwidtha{7cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{{\bf wxMEDIACTRLPLAYERCONTROLS\_NONE}}{No controls. return wxMediaCtrl to it's default state.}
+\twocolitem{{\bf wxMEDIACTRLPLAYERCONTROLS\_STEP}}{Step controls like fastfoward, step one frame etc.}
+\twocolitem{{\bf wxMEDIACTRLPLAYERCONTROLS\_VOLUME}}{Volume controls like the speaker icon, volume slider, etc.}
+\twocolitem{{\bf wxMEDIACTRLPLAYERCONTROLS\_DEFAULT}}{Default controls for the toolkit. Currently a typedef for wxMEDIACTRLPLAYERCONTROLS\_STEP and wxMEDIACTRLPLAYERCONTROLS\_VOLUME.}
+\end{twocollist}

 
 

-\membersection{wxMediaCtrl::GetPlaybackRate}\label{wxmediactrlgetplaybackrate}
+For more see \helpref{Player controls}{playercontrolswxmediactrl}. Currently
+only implemented on the QuickTime and DirectShow backends. The function
+returns true on success.

 
 

-\func{double}{GetPlaybackrate}{\void}
-
-Gets the playback rate of the media; for example 2.0 is double speed.
-Not implemented on MCI or GStreamer.

 
 

+\membersection{wxMediaCtrl::Stop}\label{wxmediactrlstop}

 
 

-\membersection{wxMediaCtrl::SetPlaybackRate}\label{wxmediactrlsetplaybackrate}
+\func{bool}{Stop}{\void}

 
 

-\func{bool}{SetPlaybackrate}{\param{double }{dVolume}}
+Stops the media.

 
 

-Sets the rate that the media plays; for example 0.5 is half speed.
+See \helpref{Operation}{operationwxmediactrl} for an overview of how
+stopping works.

 
 
 
 

-\membersection{wxMediaCtrl::ShowPlayerControls}\label{wxmediactrlshowplayercontrols}
+\membersection{wxMediaCtrl::Tell}\label{wxmediactrlgetposition}

 
 

-\func{bool}{ShowPlayerControls}{\param{wxMediaCtrlPlayerControls }{flags}}
+\func{wxFileOffset}{Tell}{\void}

 
 

-Normally, when you use wxMediaCtrl it is just a window for the video to 
-play in.  However, platforms generally have their own media player interface,
-like quicktime has a bar below the video with a slider etc..  If you want that native 
-interface instead of making your own use this function.  There are several options
-for the flags parameter, however you can look at the mediactrl header for these. 
-The two general flags are wxMEDIACTRLPLAYERCONTROLS\_NONE which turns off the 
-native interface, and wxMEDIACTRLPLAYERCONTROLS\_DEFAULT which lets wxMediaCtrl
-decide what native controls on the interface.
+Obtains the current position in time within the movie in milliseconds.