gschem/include/gschem_pango.h

   1 /* gEDA - GPL Electronic Design Automation
   2  * gschem - gEDA Schematic Capture
   3  * Copyright (C) 2008-2010 gEDA Contributors (see ChangeLog for details)
   4  * Copyright (C) 2000 Red Hat, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  *
  21  * This file based on GDK's gdkpango.h (LGPL V2+)
  22  * Copyright (C) 2000 Red Hat, Inc.
  23  */
  24
  25 #ifndef __GSCHEM_PANGO_H__
  26 #define __GSCHEM_PANGO_H__
  27
  28 #include <gdk/gdktypes.h>
  29
  30 G_BEGIN_DECLS
  31
  32 /* Pango interaction */
  33
  34 typedef struct _GschemPangoRenderer        GschemPangoRenderer;
  35 typedef struct _GschemPangoRendererClass   GschemPangoRendererClass;
  36 typedef struct _GschemPangoRendererPrivate GschemPangoRendererPrivate;
  37
  38 #define GSCHEM_TYPE_PANGO_RENDERER            (gschem_pango_renderer_get_type())
  39 #define GSCHEM_PANGO_RENDERER(object)         (G_TYPE_CHECK_INSTANCE_CAST ((object), GSCHEM_TYPE_PANGO_RENDERER, GschemPangoRenderer))
  40 #define GSCHEM_IS_PANGO_RENDERER(object)      (G_TYPE_CHECK_INSTANCE_TYPE ((object), GSCHEM_TYPE_PANGO_RENDERER))
  41 #define GSCHEM_PANGO_RENDERER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GSCHEM_TYPE_PANGO_RENDERER, GschemPangoRendererClass))
  42 #define GSCHEM_IS_PANGO_RENDERER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GSCHEM_TYPE_PANGO_RENDERER))
  43 #define GSCHEM_PANGO_RENDERER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GSCHEM_TYPE_PANGO_RENDERER, GschemPangoRendererClass))
  44
  45 /**
  46  * GschemPangoRenderer:
  47  *
  48  * #GschemPangoRenderer is a subclass of #PangoRenderer used for rendering
  49  * text of gschem TEXT objects.
  50  *
  51  * Pango functions like pango_renderer_draw_layout() and
  52  * pango_renderer_draw_layout_line() are then used to draw objects with
  53  * the renderer.
  54  **/
  55 struct _GschemPangoRenderer
  56 {
  57   /*< private >*/
  58   PangoRenderer parent_instance;
  59
  60   GschemPangoRendererPrivate *priv;
  61 };
  62
  63
  64 struct _GschemPangoRendererClass
  65 {
  66   /*< private >*/
  67   PangoRendererClass parent_class;
  68 };
  69
  70 GType gschem_pango_renderer_get_type (void) G_GNUC_CONST;
  71
  72 PangoRenderer *gschem_pango_renderer_new      (cairo_t *cr);
  73
  74 void gschem_pango_show_layout                 (cairo_t     *cr,
  75                                                PangoLayout *pl);
  76
  77 void gschem_pango_renderer_set_overbar        (GschemPangoRenderer *gdk_renderer,
  78                                                gboolean             overbar);
  79
  80 /************************************************************************/
  81
  82 /* Attributes use to render text with overbars */
  83
  84 typedef struct _GschemPangoAttrOverbar GschemPangoAttrOverbar;
  85
  86 struct _GschemPangoAttrOverbar
  87 {
  88   PangoAttribute attr;
  89   gboolean overbar;
  90 };
  91
  92 PangoAttribute *gschem_pango_attr_overbar_new (gboolean overbar);
  93
  94 G_END_DECLS
  95
  96 #endif /* __GSCHEM_PANGO_H__ */