adg/adg-adim.c

   1 /* ADG - Automatic Drawing Generation
   2  * Copyright (C) 2007,2008,2009 Nicola Fontana <ntd at entidi.it>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301, USA.
  18  */
  19
  20
  21 /**
  22  * SECTION:adim
  23  * @title: AdgADim
  24  * @short_description: Angular dimensions
  25  *
  26  * The #AdgADim entity represents an angular dimension.
  27  */
  28
  29 #include "adg-adim.h"
  30 #include "adg-adim-private.h"
  31 #include "adg-container.h"
  32 #include "adg-util.h"
  33 #include "adg-intl.h"
  34
  35
  36 enum {
  37     PROP_0,
  38     PROP_DIRECTION
  39 };
  40
  41
  42 static void     finalize                (GObject        *object);
  43 static void     model_matrix_changed    (AdgEntity      *entity,
  44                                          AdgMatrix      *parent_matrix);
  45 static void     render                  (AdgEntity      *entity,
  46                                          cairo_t        *cr);
  47 static gchar *  default_quote           (AdgDim         *dim);
  48
  49
  50 G_DEFINE_TYPE(AdgADim, adg_adim, ADG_TYPE_DIM);
  51
  52
  53 static void
  54 adg_adim_class_init(AdgADimClass *klass)
  55 {
  56     GObjectClass *gobject_class;
  57     AdgEntityClass *entity_class;
  58     AdgDimClass *dim_class;
  59     GParamSpec *param;
  60
  61     gobject_class = (GObjectClass *) klass;
  62     entity_class = (AdgEntityClass *) klass;
  63     dim_class = (AdgDimClass *) klass;
  64
  65     g_type_class_add_private(klass, sizeof(AdgADimPrivate));
  66
  67     gobject_class->finalize = finalize;
  68
  69     entity_class->model_matrix_changed = model_matrix_changed;
  70     entity_class->render = render;
  71
  72     dim_class->default_quote = default_quote;
  73
  74     param = g_param_spec_double("direction",
  75                                 P_("Direction"),
  76                                 P_("The inclination angle of the extension lines"),
  77                                 -G_MAXDOUBLE, G_MAXDOUBLE, ADG_DIR_RIGHT,
  78                                 G_PARAM_READWRITE | G_PARAM_CONSTRUCT);
  79     g_object_class_install_property(gobject_class, PROP_DIRECTION, param);
  80 }
  81
  82 static void
  83 adg_adim_init(AdgADim *adim)
  84 {
  85     AdgADimPrivate *priv = G_TYPE_INSTANCE_GET_PRIVATE(adim, ADG_TYPE_ADIM,
  86                                                        AdgADimPrivate);
  87
  88     priv->extension1.status = CAIRO_STATUS_SUCCESS;
  89     priv->extension1.data = NULL;
  90     priv->extension1.num_data = 4;
  91
  92     priv->extension2.status = CAIRO_STATUS_SUCCESS;
  93     priv->extension2.data = NULL;
  94     priv->extension2.num_data = 4;
  95
  96     priv->arrow_path.status = CAIRO_STATUS_SUCCESS;
  97     priv->arrow_path.data = NULL;
  98     priv->arrow_path.num_data = 4;
  99
 100     priv->baseline.status = CAIRO_STATUS_SUCCESS;
 101     priv->baseline.data = NULL;
 102     priv->baseline.num_data = 4;
 103
 104     adim->priv = priv;
 105 }
 106
 107 static void
 108 finalize(GObject *object)
 109 {
 110     AdgADimPrivate *priv = ((AdgADim *) object)->priv;
 111
 112     g_free(priv->extension1.data);
 113     g_free(priv->extension2.data);
 114     g_free(priv->arrow_path.data);
 115     g_free(priv->baseline.data);
 116 }
 117
 118 static void
 119 model_matrix_changed(AdgEntity *entity, AdgMatrix *parent_matrix)
 120 {
 121     AdgEntityClass *entity_class = (AdgEntityClass *) adg_adim_parent_class;
 122
 123     /* TODO */
 124
 125     if (entity_class->model_matrix_changed != NULL)
 126         entity_class->model_matrix_changed(entity, parent_matrix);
 127 }
 128
 129 static void
 130 render(AdgEntity *entity, cairo_t *cr)
 131 {
 132     /* TODO */
 133 }
 134
 135 static gchar *
 136 default_quote(AdgDim *dim)
 137 {
 138     /* TODO */
 139     return g_strdup("TODO");
 140 }
 141
 142
 143
 144 /**
 145  * adg_adim_new:
 146  *
 147  * Creates a new - unreferenced - angular dimension. You must, at least, define
 148  * the reference points with adg_dim_set_ref() and the position reference using
 149  * adg_dim_set_pos().
 150  *
 151  * Return value: the new entity
 152  */
 153 AdgEntity *
 154 adg_adim_new(void)
 155 {
 156     return (AdgEntity *) g_object_new(ADG_TYPE_ADIM, NULL);
 157 }