Minor doc updates.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4359 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
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@ -19,7 +19,7 @@ For example:
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{
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// This data objects are held by the clipboard,
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// so do not delete them in the app.
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wxTheClipboard->AddData( new wxTextDataObject("Some text") );
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wxTheClipboard->SetData( new wxTextDataObject("Some text") );
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wxTheClipboard->Close();
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}
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@ -26,17 +26,12 @@ If path is ``", the current directory will be used. If filename is ``",
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no default filename will be supplied. The wildcard determines what files
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are displayed in the file selector, and file extension supplies a type
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extension for the required filename. Flags may be a combination of wxOPEN,
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wxSAVE, wxOVERWRITE\_PROMPT, wxHIDE\_READONLY, or 0. They are only significant
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at present in Windows.
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wxSAVE, wxOVERWRITE\_PROMPT, wxHIDE\_READONLY, or 0.
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Both the X and Windows versions implement a wildcard filter. Typing a
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filename containing wildcards (*, ?) in the filename text item, and
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clicking on Ok, will result in only those files matching the pattern being
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displayed. In the X version, supplying no default name will result in the
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wildcard filter being inserted in the filename text item; the filter is
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ignored if a default name is supplied.
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Under Windows (only), the wildcard may be a specification for multiple
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displayed. The wildcard may be a specification for multiple
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types of file with a description for each, such as:
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\begin{verbatim}
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@ -69,10 +64,10 @@ Constructor. Use \helpref{wxFileDialog::ShowModal}{wxfiledialogshowmodal} to sho
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\twocolwidtha{5cm}
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\begin{twocollist}
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\twocolitem{{\bf wxOPEN}}{This is an open dialog (Windows only).}
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\twocolitem{{\bf wxSAVE}}{This is a save dialog (Windows only).}
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\twocolitem{{\bf wxHIDE\_READONLY}}{Hide read-only files (Windows only).}
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\twocolitem{{\bf wxOVERWRITE\_PROMPT}}{Prompt for a conformation if a file will be overridden (Windows only).}
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\twocolitem{{\bf wxOPEN}}{This is an open dialog.}
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\twocolitem{{\bf wxSAVE}}{This is a save dialog.}
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\twocolitem{{\bf wxHIDE\_READONLY}}{Hide read-only files.}
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\twocolitem{{\bf wxOVERWRITE\_PROMPT}}{Prompt for a conformation if a file will be overridden.}
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\end{twocollist}%
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}
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@ -45,10 +45,10 @@ Constructor. Use \helpref{wxMessageDialog::ShowModal}{wxmessagedialogshowmodal}
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\twocolitem{{\bf wxYES\_NO}}{Show Yes and No buttons.}
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\twocolitem{{\bf wx\_NO\_DEFAULT}}{Used with {\bf wxYES\_NO}, makes {\bf No} button the default.}
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\twocolitem{{\bf wxCENTRE}}{Centre the message. Not Windows.}
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\twocolitem{{\bf wxICON\_EXCLAMATION}}{Shows an exclamation mark icon. Windows only.}
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\twocolitem{{\bf wxICON\_HAND}}{Shows a hand icon. Windows only.}
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\twocolitem{{\bf wxICON\_QUESTION}}{Shows a question mark icon. Windows only.}
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\twocolitem{{\bf wxICON\_INFORMATION}}{Shows an information (i) icon. Windows only.}
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\twocolitem{{\bf wxICON\_EXCLAMATION}}{Shows an exclamation mark icon.}
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\twocolitem{{\bf wxICON\_HAND}}{Shows a hand icon.}
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\twocolitem{{\bf wxICON\_QUESTION}}{Shows a question mark icon.}
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\twocolitem{{\bf wxICON\_INFORMATION}}{Shows an information (i) icon.}
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\end{twocollist}
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}
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@ -24,7 +24,7 @@ stream to get new compressed data.
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\section{\class{wxZlibOutputStream}}\label{wxzliboutputstream}
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This stream compresses all data written to it, and passes the compressed data
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to the ``filtered'' stream.
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to the "filtered" stream.
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\wxheading{Derived from}
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@ -7,16 +7,6 @@ Classes: \helpref{wxDataObject}{wxdataobject},
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\helpref{wxTextDropTarget}{wxtextdroptarget},
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\helpref{wxFileDropTarget}{wxfiledroptarget}
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It has to be noted that the API for drag and drop in wxWindows is not
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yet finished which is mostly due to the fact that DnD support under
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GTK 1.0 is very rudimentary and entirely different from the XDnD
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protocol used by GTK 1.2. This also entails that not all of the documentation
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concerning DnD might be correct and some of the code might get broken
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in the future. The next release of wxWindows will be based on GTK 1.2
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and will hopefully include a much improved DnD support. The general
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design on the wxDropSource side will be the same but especially the
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wxDropTarget is almost certain to change.
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Note that wxUSE\_DRAG\_AND\_DROP must be defined in setup.h in order
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to use Drag'n'Drop in wxWindows.
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@ -55,8 +45,8 @@ of wxDropSource object which should be constructed like this:
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\item {\bf Dragging:} The call to DoDragDrop() blocks until the user release the
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mouse button (unless you override \helpref{GiveFeedback}{wxdropsourcegivefeedback} function
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to do something special). When the mouse moves in a window of a program which understands the
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same drag-and-drop protocol (any program under Windows or any program supporting GTK 1.0
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DnD protocol under X Windows), the corresponding \helpref{wxDropTarget}{wxdroptarget} methods
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same drag-and-drop protocol (any program under Windows or any program supporting the
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XDnD protocol under X Windows), the corresponding \helpref{wxDropTarget}{wxdroptarget} methods
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are called - see below.
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\item {\bf Processing the result:} DoDragDrop() returns an {\it effect code} which
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is one of the values of \helpref{wxDragResult}{wxdropsource} enum. Codes
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@ -82,13 +72,12 @@ derive from \helpref{wxTextDropTarget}{wxtextdroptarget} or
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\helpref{wxFileDropTarget}{wxfiledroptarget} and override their OnDropText()
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or OnDropFiles() method.
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\item {\bf Drop:} When the user releases the mouse over a window, wxWindows
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queries the associated wxDropTarget object if it accepts the data. For
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this, \helpref{GetFormatCount}{wxdroptargetgetformatcount} and \helpref{GetFormat}{wxdroptargetgetformat} are
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used and if the format is
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supported (i.e. is one of returned by GetFormat()),
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then \helpref{OnDrop}{wxdroptargetondrop} is called.
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Otherwise, wxDragNone is returned by DoDragDrop() and
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nothing happens.
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queries the associated wxDropTarget object if it accepts the data. For this,
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a \helpref{wxDataObject}{wxdataobject} must be associated with the drop target
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and this data object will be responsible for the format negotiation between
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the drag source and the drop target. If all goes well, then \helpref{OnData}{wxdroptargetondata}
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will get called and the wxDataObject belonging to the drop target can get
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filled with data.
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\item {\bf The end:} After processing the data, DoDragDrop() returns either
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wxDragCopy or wxDragMove depending on the state of the keys (<Ctrl>, <Shift>
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and <Alt>) at the moment of drop. There is currently no way for the drop
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@ -99,8 +99,8 @@ section.
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In wxWindows, the code fragment froim above should be written instead:
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\begin{verbatim}
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wxChar ch = T('*');
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wxString s = T("Hello, world!");
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wxChar ch = wxT('*');
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wxString s = wxT("Hello, world!");
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int len = s.Len();
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\end{verbatim}
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@ -112,26 +112,26 @@ compilation in the program itself.
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We have a {\tt wxChar} type which maps either on {\tt char} or {\tt wchar\_t}
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depending on the mode in which program is being compiled. There is no need for
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a separate type for strings though, because the standard
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\helpref{wxString}{wxstring} supports Unicode, i.e. it stores iether ANSI or
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Unicode strings depending on the mode.
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\helpref{wxString}{wxstring} supports Unicode, i.e. it stores either ANSI or
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Unicode strings depending on the compile mode.
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Finally, there is a special {\tt T()} macro which should enclose all literal
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Finally, there is a special {\tt wxT()} macro which should enclose all literal
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strings in the program. As it's easy to see comparing the last fragment with
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the one above, this macro expands to nothing in the (usual) ANSI mode and
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prefixes {\tt 'L'} to its argument in the Unicode mode.
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The important conclusion is that if you use {\tt wxChar} instead of
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{\tt char}, avoid using C style strings and use {\tt wxString} instead and
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don't forget to enclose all string literals inside {\tt T()} macro, your
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don't forget to enclose all string literals inside {\tt wxT()} macro, your
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program automatically becomes (almost) Unicode compliant!
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Just let us state once again the rules:
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\begin{itemize}
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\item Always use {\tt wxChar} instead of {\tt char}
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\item Always enclose literal string constants in {\tt T()} macro unless
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\item Always enclose literal string constants in {\tt wxT()} macro unless
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they're already converted to the right representation (another standard
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wxWindows macro {\tt \_()} does it, so there is no need for {\tt T()} in this
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wxWindows macro {\tt \_()} does it, so there is no need for {\tt wxT()} in this
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case) or you intend to pass the constant directly to an external function
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which doesn't accept wide-character strings.
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\item Use {\tt wxString} instead of C style strings.
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