include/wx/gtk/dvrenderer.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/gtk/dvrenderer.h
   3 // Purpose:     wxDataViewRenderer for GTK wxDataViewCtrl implementation
   4 // Author:      Robert Roebling, Vadim Zeitlin
   5 // Created:     2009-11-07 (extracted from wx/gtk/dataview.h)
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2006 Robert Roebling
   8 //              (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_GTK_DVRENDERER_H_
  13 #define _WX_GTK_DVRENDERER_H_
  14
  15 typedef struct _GtkCellRendererText GtkCellRendererText;
  16 typedef struct _GtkTreeViewColumn GtkTreeViewColumn;
  17
  18 // ----------------------------------------------------------------------------
  19 // wxDataViewRenderer
  20 // ----------------------------------------------------------------------------
  21
  22 class WXDLLIMPEXP_ADV wxDataViewRenderer: public wxDataViewRendererBase
  23 {
  24 public:
  25     wxDataViewRenderer( const wxString &varianttype,
  26                         wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
  27                         int align = wxDVR_DEFAULT_ALIGNMENT );
  28
  29     virtual void SetMode( wxDataViewCellMode mode );
  30     virtual wxDataViewCellMode GetMode() const;
  31
  32     virtual void SetAlignment( int align );
  33     virtual int GetAlignment() const;
  34
  35     virtual void EnableEllipsize(wxEllipsizeMode mode = wxELLIPSIZE_MIDDLE);
  36     virtual wxEllipsizeMode GetEllipsizeMode() const;
  37
  38     // GTK-specific implementation
  39     // ---------------------------
  40
  41     // pack the GTK cell renderers used by this renderer to the given column
  42     //
  43     // by default only a single m_renderer is used but some renderers use more
  44     // than one GTK cell renderer
  45     virtual void GtkPackIntoColumn(GtkTreeViewColumn *column);
  46
  47     // called when the cell value was edited by user with the new value
  48     //
  49     // it validates the new value and notifies the model about the change by
  50     // calling GtkOnCellChanged() if it was accepted
  51     virtual void GtkOnTextEdited(const gchar *itempath, const wxString& value);
  52
  53     GtkCellRenderer* GetGtkHandle() { return m_renderer; }
  54     void GtkInitHandlers();
  55     void GtkUpdateAlignment() { GtkApplyAlignment(m_renderer); }
  56
  57     // should be overridden to return true if the renderer supports properties
  58     // corresponding to wxDataViewItemAttr field, see wxGtkTreeCellDataFunc()
  59     // for details
  60     virtual bool GtkSupportsAttrs() const { return false; }
  61
  62     // if GtkSupportsAttrs() returns true, this function will be called to
  63     // effectively set the attribute to use for rendering the next item
  64     //
  65     // it should return true if the attribute had any non-default properties
  66     virtual bool GtkSetAttr(const wxDataViewItemAttr& WXUNUSED(attr))
  67         { return false; }
  68
  69
  70     // these functions are only called if GtkSupportsAttrs() returns true and
  71     // are used to remember whether the renderer currently uses the default
  72     // attributes or if we changed (and not reset them)
  73     bool GtkIsUsingDefaultAttrs() const { return m_usingDefaultAttrs; }
  74     void GtkSetUsingDefaultAttrs(bool def) { m_usingDefaultAttrs = def; }
  75
  76     // return the text renderer used by this renderer for setting text cell
  77     // specific attributes: can return NULL if this renderer doesn't render any
  78     // text
  79     virtual GtkCellRendererText *GtkGetTextRenderer() const { return NULL; }
  80
  81     wxDataViewCellMode GtkGetMode() { return m_mode; }
  82
  83 protected:
  84     virtual void GtkOnCellChanged(const wxVariant& value,
  85                                   const wxDataViewItem& item,
  86                                   unsigned col);
  87
  88     // Apply our effective alignment (i.e. m_alignment if specified or the
  89     // associated column alignment by default) to the given renderer.
  90     void GtkApplyAlignment(GtkCellRenderer *renderer);
  91
  92     GtkCellRenderer    *m_renderer;
  93     int                 m_alignment;
  94     wxDataViewCellMode  m_mode;
  95
  96     // true if we hadn't changed any visual attributes or restored them since
  97     // doing this
  98     bool m_usingDefaultAttrs;
  99
 100 protected:
 101     DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewRenderer)
 102 };
 103
 104 #endif // _WX_GTK_DVRENDERER_H_
 105