wxFont can now raelly use the native fonts

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

diff --git a/docs/latex/wx/text.tex b/docs/latex/wx/text.tex
index a9c2117f2dc13e64b13f288b43128c54c6eb19e9..befde501633e6a69a25d8e9a1fa2eeab2ff0738a 100644 (file)
--- a/docs/latex/wx/text.tex
+++ b/docs/latex/wx/text.tex
@@ -1,3 +1,75 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxTextAttr %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{\class{wxTextAttr}}\label{wxtextattr}
+
+wxTextAttr represents the attributes, or style, for a range of text in a\rtfsp
+\helpref{wxTextCtrl}{wxtextctrl}.
+
+\wxheading{Derived from}
+
+No base class
+
+\wxheading{Include files}
+
+<wx/textctrl.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxTextAttr::wxTextAttr}\label{wxtextattrctor}
+
+\func{}{wxTextAttr}{\void}
+
+\func{}{wxTextAttr}{\param{const wxColour\& }{colText}, \param{const wxColour\& }{colBack = wxNullColour}, \param{const wxFont\& }{font = wxNullFont}}
+
+The constructors initialize one or more of the text foreground and background
+colours and font. The values not initialized in the constructor can be set
+later, otherwise \helpref{wxTextCtrl::SetStyle}{wxtextctrlsetstyle} will use
+the default values for them.
+
+\membersection{wxTextAttr::GetBackgroundColour}
+
+\constfunc{const wxColour\&}{GetBackgroundColour}{\void}
+
+Return the background colour specified by this attribute.
+
+\membersection{wxTextAttr::GetFont}
+
+\constfunc{const wxFont\&}{GetFont}{\void}
+
+Return the text font specified by this attribute.
+
+\membersection{wxTextAttr::GetTextColour}
+
+\constfunc{const wxColour\&}{GetTextColour}{\void}
+
+Return the text colour specified by this attribute.
+
+\membersection{wxTextAttr::HasBackgroundColour}
+
+\constfunc{bool}{HasBackgroundColour}{\void}
+
+Returns {\tt TRUE} if this style specifies the background colour to use.
+
+\membersection{wxTextAttr::HasFont}
+
+\constfunc{bool}{HasFont}{\void}
+
+Returns {\tt TRUE} if this style specifies the font to use.
+
+\membersection{wxTextAttr::HasTextColour}
+
+\constfunc{bool}{HasTextColour}{\void}
+
+Returns {\tt TRUE} if this style specifies the foreground colour to use.
+
+\membersection{wxTextAttr::IsDefault}
+
+\constfunc{bool}{IsDefault}{\void}
+
+Returns {\tt TRUE} if this style specifies any non-default attributes.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%% wxTextCtrl %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+

 \section{\class{wxTextCtrl}}\label{wxtextctrl}
 
 A text control allows text to be displayed and edited. It may be
 \section{\class{wxTextCtrl}}\label{wxtextctrl}
 
 A text control allows text to be displayed and edited. It may be


@@ -36,16 +108,51 @@ style is ignored under other platforms.}
 \twocolitem{\windowstyle{wxTE\_AUTO\_URL}}{Highlight the URLs and generate the
 wxTextUrlEvents when mouse events occur over them. This style is supported
 under Win32 only and requires wxTE\_RICH.}
 \twocolitem{\windowstyle{wxTE\_AUTO\_URL}}{Highlight the URLs and generate the
 wxTextUrlEvents when mouse events occur over them. This style is supported
 under Win32 only and requires wxTE\_RICH.}

+\twocolitem{\windowstyle{wxTE\_NOHIDESEL}}{By default, the Windows text control
+doesn't show the selection when it doesn't have focus - use this style to force
+it to always show it. It doesn't do anything under other platforms.}

 \twocolitem{\windowstyle{wxHSCROLL}}{A horizontal scrollbar will be created. No effect under GTK+.}
 \end{twocollist}
 
 \twocolitem{\windowstyle{wxHSCROLL}}{A horizontal scrollbar will be created. No effect under GTK+.}
 \end{twocollist}
 

-See also \helpref{window styles overview}{windowstyles} and 
+See also \helpref{window styles overview}{windowstyles} and

 \helpref{wxTextCtrl::wxTextCtrl}{wxtextctrlconstr}.
 
 \helpref{wxTextCtrl::wxTextCtrl}{wxtextctrlconstr}.
 

-\wxheading{Remarks}
+\wxheading{wxTextCtrl styles}
+
+Multi-line text controls support the styles, i.e. provide a possibility to set
+colours and font for individual characters in it (note that under Windows {\tt
+wxTE\_RICH} style is required for style support). To use the styles you can
+either call \helpref{SetDefaultStyle}{wxtextctrlsetdefaultstyle} before
+inserting the text or call \helpref{SetStyle}{wxtextctrlsetstyle} later to
+change the style of the text already in the control (the first solution is
+much more efficient).
+
+In either case, if the style doesn't specify some of the attributes (for
+example you only want to set the text colour but without changing the font nor
+the text background), the values of the default style will be used for them.
+If there is no default style, the attributes of the text control itself are
+used.

 
 

-This class multiply-inherits from {\bf streambuf} where compilers allow, allowing code such as 
-the following:
+So the following code correctly describes what it does: the second call
+to \helpref{SetDefaultStyle}{wxtextctrlsetdefaultstyle} doesn't change the
+text foreground colour (which stays red) while the last one doesn't change the
+background colour (which stays grey):
+
+{\small%
+\begin{verbatim}
+    text->SetDefaultStyle(wxTextAttr(*wxRED));
+    text->AppendText("Red text\n");
+    text->SetDefaultStyle(wxTextAttr(wxNullColour, *wxLIGHT_GREY));
+    text->AppendText("Red on grey text\n");
+    text->SetDefaultStyle(wxTextAttr(*wxBLUE);
+    text->AppendText("Blue on grey text\n");
+\end{verbatim}
+}%
+
+\wxheading{wxTextCtrl and C++ streams}
+
+This class multiply-inherits from {\bf streambuf} where compilers allow,
+allowing code such as the following:

 
 {\small%
 \begin{verbatim}
 
 {\small%
 \begin{verbatim}


@@ -58,13 +165,62 @@ the following:
 \end{verbatim}
 }%
 
 \end{verbatim}
 }%
 

-If your compiler does not support derivation from {\bf streambuf} and gives a compile error, define the symbol 
-{\bf NO\_TEXT\_WINDOW\_STREAM} in the wxTextCtrl header file.
+If your compiler does not support derivation from {\bf streambuf} and gives a
+compile error, define the symbol {\bf NO\_TEXT\_WINDOW\_STREAM} in the
+wxTextCtrl header file.
+
+Note that independently of this setting you can always use wxTextCtrl itself
+in a stream-like manner:
+
+{\small%
+\begin{verbatim}
+  wxTextCtrl *control = new wxTextCtrl(...);
+
+  *control << 123.456 << " some text\n";
+\end{verbatim}
+}%
+
+always works. However the possibility to create an ostream associated with
+wxTextCtrl may be useful if you need to redirect the output of a function
+taking an ostream as parameter to a text control.

 
 

-% VZ: it is wrong to say that C++ iostreams are deprecated, we need a better
-%     wording here - disabling this for now
-%Note that any use of C++ iostreams (including this one) is deprecated and might
-%get completely removed in the future.
+Another commonly requested need is to redirect {\bf std::cout} to the text
+control. This could be done in the following way:
+
+{\small%
+\begin{verbatim}
+  #include <iostream>
+
+  wxTextCtrl *control = new wxTextCtrl(...);
+
+  std::streambuf *sbOld = std::cout.rdbuf();
+  std::cout.rdbuf(*control);
+
+  // use cout as usual, the output appears in the text control
+  ...
+
+  std::cout.rdbuf(sbOld);
+\end{verbatim}
+}%
+
+But wxWindows provides a convenient class to make it even simpler so instead
+you may just do
+
+{\small%
+\begin{verbatim}
+  #include <iostream>
+
+  wxTextCtrl *control = new wxTextCtrl(...);
+
+  wxStreamToTextRedirector redirect(control);
+
+  // all output to cout goes into the text control until the exit from current
+  // scope
+\end{verbatim}
+}%
+
+See \helpref{wxStreamToTextRedirector}{wxstreamtotextredirector} for more
+details.

 
 \wxheading{Event handling}
 
 
 \wxheading{Event handling}
 


@@ -83,12 +239,13 @@ when the text controls contents changes - whether this is due to user input or
 comes from the program itself (for example, if SetValue() is called)}
 \twocolitem{{\bf EVT\_TEXT\_ENTER(id, func)}}{Respond to a wxEVT\_COMMAND\_TEXT\_ENTER event,
 generated when enter is pressed in a single-line text control.}
 comes from the program itself (for example, if SetValue() is called)}
 \twocolitem{{\bf EVT\_TEXT\_ENTER(id, func)}}{Respond to a wxEVT\_COMMAND\_TEXT\_ENTER event,
 generated when enter is pressed in a single-line text control.}

+\twocolitem{{\bf EVT\_TEXT\_URL(id, func)}}{A mouse event occured over an URL
+in the text control (Win32 only)}
+\twocolitem{{\bf EVT\_TEXT\_MAXLEN(id, func)}}{User tried to enter more text
+into the control than the limit set by
+\helpref{SetMaxLength}{wxtextctrlsetmaxlength}.}

 \end{twocollist}%
 
 \end{twocollist}%
 

-%\wxheading{See also}
-%
-%\helpref{wxRichTextCtrl}{wxrichtextctrl}
-%

 \latexignore{\rtfignore{\wxheading{Members}}}
 
 \membersection{wxTextCtrl::wxTextCtrl}\label{wxtextctrlconstr}
 \latexignore{\rtfignore{\wxheading{Members}}}
 
 \membersection{wxTextCtrl::wxTextCtrl}\label{wxtextctrlconstr}


@@ -232,6 +389,16 @@ Copies the selected text to the clipboard and removes the selection.
 
 Resets the internal `modified' flag as if the current edits had been saved.
 
 
 Resets the internal `modified' flag as if the current edits had been saved.
 

+\membersection{wxTextCtrl::GetDefaultStyle}\label{wxtextctrlgetdefaultstyle}
+
+\constfunc{const wxTextAttr\& }{GetDefaultStyle}{\void}
+
+Returns the style currently used for the new text.
+
+\wxheading{See also}
+
+\helpref{SetDefaultStyle}{wxtextctrlsetdefaultstyle}
+

 \membersection{wxTextCtrl::GetInsertionPoint}\label{wxtextctrlgetinsertionpoint}
 
 \constfunc{virtual long}{GetInsertionPoint}{\void}
 \membersection{wxTextCtrl::GetInsertionPoint}\label{wxtextctrlgetinsertionpoint}
 
 \constfunc{virtual long}{GetInsertionPoint}{\void}


@@ -315,6 +482,13 @@ working with controls that contain large amounts of text.
 Gets the current selection span. If the returned values are equal, there was
 no selection.
 
 Gets the current selection span. If the returned values are equal, there was
 no selection.
 

+Please note that the indices returned may be used with the other wxTextctrl
+methods but don't necessarily represent the correct indices into the string
+returned by \helpref{GetValue()}{wxtextctrlgetvalue} for multiline controls
+under Windows (at least,) you should use
+\helpref{GetStringSelection()}{wxtextctrlgetstringselection} to get the selected
+text.
+

 \wxheading{Parameters}
 
 \docparam{from}{The returned first position.}
 \wxheading{Parameters}
 
 \docparam{from}{The returned first position.}


@@ -327,6 +501,13 @@ consisting of the from and to values.}
 \perlnote{In wxPerl this method takes no parameter and returns a
 2-element list {\tt ( from, to )}.}
 
 \perlnote{In wxPerl this method takes no parameter and returns a
 2-element list {\tt ( from, to )}.}
 

+\membersection{wxTextCtrl::GetStringSelection}\label{wxtextctrlgetstringselection}
+
+\func{virtual wxString}{GetStringSelection}{\void}
+
+Gets the text currently selected in the control. If there is no selection, the
+returned string is empty.
+

 \membersection{wxTextCtrl::GetValue}\label{wxtextctrlgetvalue}
 
 \constfunc{wxString}{GetValue}{\void}
 \membersection{wxTextCtrl::GetValue}\label{wxtextctrlgetvalue}
 
 \constfunc{wxString}{GetValue}{\void}


@@ -487,6 +668,36 @@ Saves the contents of the control in a text file.
 
 TRUE if the operation was successful, FALSE otherwise.
 
 
 TRUE if the operation was successful, FALSE otherwise.
 

+\membersection{wxTextCtrl::SetDefaultStyle}\label{wxtextctrlsetdefaultstyle}
+
+\func{bool}{SetDefaultStyle}{\param{const wxTextAttr\& }{style}}
+
+Changes the default style to use for the new text which is going to be added
+to the control using \helpref{WriteText}{wxtextctrlwritetext} or\rtfsp
+\helpref{AppendText}{wxtextctrlappendtext}.
+
+If either of the font, foreground, or background colour is not set in\rtfsp
+{\it style}, the values of the previous default style are used for them. If
+the previous default style didn't set them neither, the global font or colours
+of the text control itself are used as fall back.
+
+However if the {\it style} parameter is the default wxTextAttr, then the
+default style is just reset (instead of being combined with the new style which
+wouldn't change it at all).
+
+\wxheading{Parameters}
+
+\docparam{style}{The style for the new text.}
+
+\wxheading{Return value}
+
+{\tt TRUE} on success, {\tt FALSE} if an error occured - may also mean that
+the styles are not supported under this platform.
+
+\wxheading{See also}
+
+\helpref{GetDefaultStyle}{wxtextctrlgetdefaultstyle}
+

 \membersection{wxTextCtrl::SetEditable}\label{wxtextctrlseteditable}
 
 \func{virtual void}{SetEditable}{\param{const bool}{ editable}}
 \membersection{wxTextCtrl::SetEditable}\label{wxtextctrlseteditable}
 
 \func{virtual void}{SetEditable}{\param{const bool}{ editable}}


@@ -522,8 +733,12 @@ This function sets the maximum number of characters the user can enter into the
 control. In other words, it allows to limit the text value length to {\it len}
 not counting the terminating {\tt NUL} character.
 
 control. In other words, it allows to limit the text value length to {\it len}
 not counting the terminating {\tt NUL} character.
 

+If {\it len} is $0$, the previously set max length limi, if any, is discarded
+and the user may enter as much text as the underlying native text control
+widget supports (typically at least 32Kb).
+

 If the user tries to enter more characters into the text control when it
 If the user tries to enter more characters into the text control when it

-already is filled up to the maximal length, a 
+already is filled up to the maximal length, a

 {\tt wxEVT\_COMMAND\_TEXT\_MAXLEN} event is sent to notify the program about it
 (giving it the possibility to show an explanatory message, for example) and the
 extra input is discarded.
 {\tt wxEVT\_COMMAND\_TEXT\_MAXLEN} event is sent to notify the program about it
 (giving it the possibility to show an explanatory message, for example) and the
 extra input is discarded.


@@ -534,8 +749,6 @@ Note that this function may only be used with single line text controls.
 
 Only implemented in wxMSW/wxGTK starting with wxWindows 2.3.2.
 
 
 Only implemented in wxMSW/wxGTK starting with wxWindows 2.3.2.
 

-The {\tt wxEVT\_COMMAND\_TEXT\_MAXLEN} event is only sent by wxMSW.
-

 \membersection{wxTextCtrl::SetSelection}\label{wxtextctrlsetselection}
 
 \func{virtual void}{SetSelection}{\param{long}{ from}, \param{long}{ to}}
 \membersection{wxTextCtrl::SetSelection}\label{wxtextctrlsetselection}
 
 \func{virtual void}{SetSelection}{\param{long}{ from}, \param{long}{ to}}


@@ -548,6 +761,27 @@ Selects the text starting at the first position up to (but not including) the ch
 
 \docparam{to}{The last position.}
 
 
 \docparam{to}{The last position.}
 

+\membersection{wxTextCtrl::SetStyle}\label{wxtextctrlsetstyle}
+
+\func{bool}{SetStyle}{\param{long }{start}, \param{long }{end}, \param{const wxTextAttr\& }{style}}
+
+Changes the style of the selection. If either of the font, foreground, or
+background colour is not set in {\it style}, the values of\rtfsp
+\helpref{GetDefaultStyle()}{wxtextctrlgetdefaultstyle} are used.
+
+\wxheading{Parameters}
+
+\docparam{start}{The start of selection to change.}
+
+\docparam{end}{The end of selection to change.}
+
+\docparam{style}{The new style for the selection.}
+
+\wxheading{Return value}
+
+{\tt TRUE} on success, {\tt FALSE} if an error occured - may also mean that
+the styles are not supported under this platform.
+

 \membersection{wxTextCtrl::SetValue}\label{wxtextctrlsetvalue}
 
 \func{virtual void}{SetValue}{\param{const wxString\& }{ value}}
 \membersection{wxTextCtrl::SetValue}\label{wxtextctrlsetvalue}
 
 \func{virtual void}{SetValue}{\param{const wxString\& }{ value}}