332 lines
10 KiB
C++
332 lines
10 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/textentry.h
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// Purpose: declares wxTextEntry interface defining a simple text entry
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// Author: Vadim Zeitlin
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// Created: 2007-09-24
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// RCS-ID: $Id: textentry.h 68918 2011-08-27 14:11:13Z VZ $
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// Copyright: (c) 2007 Vadim Zeitlin <vadim@wxwindows.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_TEXTENTRY_H_
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#define _WX_TEXTENTRY_H_
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// wxTextPos is the position in the text (currently it's hardly used anywhere
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// and should probably be replaced with int anyhow)
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typedef long wxTextPos;
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class WXDLLIMPEXP_FWD_BASE wxArrayString;
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class WXDLLIMPEXP_FWD_CORE wxTextCompleter;
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class WXDLLIMPEXP_FWD_CORE wxTextEntryHintData;
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class WXDLLIMPEXP_FWD_CORE wxWindow;
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#include "wx/filefn.h" // for wxFILE and wxDIR only
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#include "wx/gdicmn.h" // for wxPoint
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// ----------------------------------------------------------------------------
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// wxTextEntryBase
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxTextEntryBase
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{
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public:
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wxTextEntryBase() { m_eventsBlock = 0; m_hintData = NULL; }
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virtual ~wxTextEntryBase();
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// accessing the value
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// -------------------
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// SetValue() generates a text change event, ChangeValue() doesn't
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virtual void SetValue(const wxString& value)
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{ DoSetValue(value, SetValue_SendEvent); }
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virtual void ChangeValue(const wxString& value);
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// writing text inserts it at the current position replacing any current
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// selection, appending always inserts it at the end and doesn't remove any
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// existing text (but it will reset the selection if there is any)
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virtual void WriteText(const wxString& text) = 0;
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virtual void AppendText(const wxString& text);
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virtual wxString GetValue() const;
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virtual wxString GetRange(long from, long to) const;
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bool IsEmpty() const { return GetLastPosition() <= 0; }
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// editing operations
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// ------------------
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virtual void Replace(long from, long to, const wxString& value);
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virtual void Remove(long from, long to) = 0;
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virtual void Clear() { SetValue(wxString()); }
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void RemoveSelection();
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// clipboard operations
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// --------------------
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virtual void Copy() = 0;
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virtual void Cut() = 0;
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virtual void Paste() = 0;
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virtual bool CanCopy() const;
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virtual bool CanCut() const;
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virtual bool CanPaste() const;
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// undo/redo
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// ---------
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virtual void Undo() = 0;
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virtual void Redo() = 0;
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virtual bool CanUndo() const = 0;
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virtual bool CanRedo() const = 0;
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// insertion point
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// ---------------
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// note that moving insertion point removes any current selection
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virtual void SetInsertionPoint(long pos) = 0;
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virtual void SetInsertionPointEnd() { SetInsertionPoint(-1); }
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virtual long GetInsertionPoint() const = 0;
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virtual long GetLastPosition() const = 0;
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// selection
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// ---------
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virtual void SetSelection(long from, long to) = 0;
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virtual void SelectAll() { SetSelection(-1, -1); }
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virtual void GetSelection(long *from, long *to) const = 0;
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bool HasSelection() const;
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virtual wxString GetStringSelection() const;
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// auto-completion
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// ---------------
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// these functions allow to auto-complete the text already entered into the
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// control using either the given fixed list of strings, the paths from the
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// file system or an arbitrary user-defined completer
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//
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// they all return true if completion was enabled or false on error (most
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// commonly meaning that this functionality is not available under the
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// current platform)
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bool AutoComplete(const wxArrayString& choices)
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{ return DoAutoCompleteStrings(choices); }
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bool AutoCompleteFileNames()
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{ return DoAutoCompleteFileNames(wxFILE); }
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bool AutoCompleteDirectories()
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{ return DoAutoCompleteFileNames(wxDIR); }
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// notice that we take ownership of the pointer and will delete it
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//
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// if the pointer is NULL auto-completion is disabled
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bool AutoComplete(wxTextCompleter *completer)
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{ return DoAutoCompleteCustom(completer); }
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// status
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// ------
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virtual bool IsEditable() const = 0;
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virtual void SetEditable(bool editable) = 0;
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// set the max number of characters which may be entered in a single line
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// text control
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virtual void SetMaxLength(unsigned long WXUNUSED(len)) { }
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// hints
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// -----
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// hint is the (usually greyed out) text shown in the control as long as
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// it's empty and doesn't have focus, it is typically used in controls used
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// for searching to let the user know what is supposed to be entered there
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virtual bool SetHint(const wxString& hint);
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virtual wxString GetHint() const;
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// margins
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// -------
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// margins are the empty space between borders of control and the text
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// itself. When setting margin, use value -1 to indicate that specific
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// margin should not be changed.
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bool SetMargins(const wxPoint& pt)
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{ return DoSetMargins(pt); }
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bool SetMargins(wxCoord left, wxCoord top = -1)
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{ return DoSetMargins(wxPoint(left, top)); }
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wxPoint GetMargins() const
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{ return DoGetMargins(); }
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// implementation only
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// -------------------
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// generate the wxEVT_COMMAND_TEXT_UPDATED event for GetEditableWindow(),
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// like SetValue() does and return true if the event was processed
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//
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// NB: this is public for wxRichTextCtrl use only right now, do not call it
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static bool SendTextUpdatedEvent(wxWindow *win);
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// generate the wxEVT_COMMAND_TEXT_UPDATED event for this window
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bool SendTextUpdatedEvent()
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{
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return SendTextUpdatedEvent(GetEditableWindow());
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}
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// generate the wxEVT_COMMAND_TEXT_UPDATED event for this window if the
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// events are not currently disabled
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void SendTextUpdatedEventIfAllowed()
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{
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if ( EventsAllowed() )
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SendTextUpdatedEvent();
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}
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// this function is provided solely for the purpose of forwarding text
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// change notifications state from one control to another, e.g. it can be
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// used by a wxComboBox which derives from wxTextEntry if it delegates all
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// of its methods to another wxTextCtrl
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void ForwardEnableTextChangedEvents(bool enable)
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{
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// it's important to call the functions which update m_eventsBlock here
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// and not just our own EnableTextChangedEvents() because our state
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// (i.e. the result of EventsAllowed()) must change as well
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if ( enable )
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ResumeTextChangedEvents();
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else
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SuppressTextChangedEvents();
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}
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protected:
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// flags for DoSetValue(): common part of SetValue() and ChangeValue() and
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// also used to implement WriteText() in wxMSW
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enum
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{
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SetValue_NoEvent = 0,
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SetValue_SendEvent = 1,
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SetValue_SelectionOnly = 2
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};
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virtual void DoSetValue(const wxString& value, int flags);
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virtual wxString DoGetValue() const = 0;
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// override this to return the associated window, it will be used for event
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// generation and also by generic hints implementation
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virtual wxWindow *GetEditableWindow() = 0;
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// margins functions
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virtual bool DoSetMargins(const wxPoint& pt);
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virtual wxPoint DoGetMargins() const;
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// the derived classes should override these virtual methods to implement
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// auto-completion, they do the same thing as their public counterparts but
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// have different names to allow overriding just one of them without hiding
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// the other one(s)
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virtual bool DoAutoCompleteStrings(const wxArrayString& WXUNUSED(choices))
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{ return false; }
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virtual bool DoAutoCompleteFileNames(int WXUNUSED(flags)) // wxFILE | wxDIR
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{ return false; }
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virtual bool DoAutoCompleteCustom(wxTextCompleter *completer);
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// class which should be used to temporarily disable text change events
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//
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// if suppress argument in ctor is false, nothing is done
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class EventsSuppressor
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{
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public:
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EventsSuppressor(wxTextEntryBase *text, bool suppress = true)
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: m_text(text),
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m_suppress(suppress)
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{
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if ( m_suppress )
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m_text->SuppressTextChangedEvents();
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}
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~EventsSuppressor()
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{
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if ( m_suppress )
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m_text->ResumeTextChangedEvents();
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}
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private:
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wxTextEntryBase *m_text;
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bool m_suppress;
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};
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friend class EventsSuppressor;
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private:
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// suppress or resume the text changed events generation: don't use these
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// functions directly, use EventsSuppressor class above instead
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void SuppressTextChangedEvents()
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{
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if ( !m_eventsBlock++ )
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EnableTextChangedEvents(false);
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}
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void ResumeTextChangedEvents()
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{
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if ( !--m_eventsBlock )
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EnableTextChangedEvents(true);
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}
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// this must be overridden in the derived classes if our implementation of
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// SetValue() or Replace() is used to disable (and enable back) generation
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// of the text changed events
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//
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// initially the generation of the events is enabled
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virtual void EnableTextChangedEvents(bool WXUNUSED(enable)) { }
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// return true if the events are currently not suppressed
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bool EventsAllowed() const { return m_eventsBlock == 0; }
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// if this counter is non-null, events are blocked
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unsigned m_eventsBlock;
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// hint-related stuff, only allocated if/when SetHint() is used
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wxTextEntryHintData *m_hintData;
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// It needs to call our Do{Get,Set}Value() to work with the real control
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// contents.
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friend class wxTextEntryHintData;
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};
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#ifdef __WXUNIVERSAL__
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// TODO: we need to use wxTextEntryDelegate here, but for now just prevent
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// the GTK/MSW classes from being used in wxUniv build
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class WXDLLIMPEXP_CORE wxTextEntry : public wxTextEntryBase
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{
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};
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#elif defined(__WXGTK20__)
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#include "wx/gtk/textentry.h"
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#elif defined(__WXMAC__)
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#include "wx/osx/textentry.h"
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#elif defined(__WXMSW__)
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#include "wx/msw/textentry.h"
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#elif defined(__WXMOTIF__)
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#include "wx/motif/textentry.h"
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#elif defined(__WXPM__)
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#include "wx/os2/textentry.h"
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#else
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// no platform-specific implementation of wxTextEntry yet
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class WXDLLIMPEXP_CORE wxTextEntry : public wxTextEntryBase
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{
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};
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#endif
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#endif // _WX_TEXTENTRY_H_
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