added (and documented) trivial but useful IsSingleLine() and IsMultiLine() text control methods

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16242 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/text.tex

@@ -567,6 +567,28 @@ read-only mode by a previous call to
 Returns {\tt TRUE} if the text has been modified by user. Note that calling 
 \helpref{SetValue}{wxtextctrlsetvalue} doesn't make the control modified.
 
+\membersection{wxTextCtrl::IsMultiLine}\label{wxtextctrlismultiline}
+
+\constfunc{bool}{IsMultiLine}{\void}
+
+Returns {\tt TRUE} if this is a multi line edit control and {\tt FALSE}
+otherwise.
+
+\wxheading{See also}
+
+\helpref{IsSingleLine}{wxtextctrlissingleline}
+
+\membersection{wxTextCtrl::IsSingleLine}\label{wxtextctrlissingleline}
+
+\constfunc{bool}{IsSingleLine}{\void}
+
+Returns {\tt TRUE} if this is a single line edit control and {\tt FALSE}
+otherwise.
+
+\wxheading{See also}
+
+\helpref{IsMultiLine}{wxtextctrlissingleline}
+
 \membersection{wxTextCtrl::LoadFile}\label{wxtextctrlloadfile}
 
 \func{bool}{LoadFile}{\param{const wxString\& }{ filename}}

include/wx/textctrl.h

@@ -174,6 +174,10 @@ public:
     virtual bool IsModified() const = 0;
     virtual bool IsEditable() const = 0;
 
+    // more readable flag testing methods
+    bool IsSingleLine() const { return !(GetWindowStyle() & wxTE_MULTILINE); }
+    bool IsMultiLine() const { return !IsSingleLine(); }
+
     // If the return values from and to are the same, there is no selection.
     virtual void GetSelection(long* from, long* to) const = 0;