git.sur5r.net Git - glabels/blob - src/object-editor-position-page.c

   1 /*
   2  *  object-editor-position-page.c
   3  *  Copyright (C) 2003-2009  Jim Evins <evins@snaught.com>.
   4  *
   5  *  This file is part of gLabels.
   6  *
   7  *  gLabels is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation, either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  gLabels is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with gLabels.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22
  23 #include "object-editor.h"
  24
  25 #include <glib/gi18n.h>
  26 #include <gtk/gtk.h>
  27 #include <math.h>
  28
  29 #include "prefs.h"
  30 #include "builder-util.h"
  31 #include "units-util.h"
  32
  33 #include "object-editor-private.h"
  34
  35 #include "debug.h"
  36
  37
  38 /*===========================================*/
  39 /* Private macros                            */
  40 /*===========================================*/
  41
  42
  43 /*===========================================*/
  44 /* Private data types                        */
  45 /*===========================================*/
  46
  47
  48 /*===========================================*/
  49 /* Private globals                           */
  50 /*===========================================*/
  51
  52
  53 /*===========================================*/
  54 /* Local function prototypes                 */
  55 /*===========================================*/
  56
  57
  58 /*--------------------------------------------------------------------------*/
  59 /* PRIVATE.  Prepare position page.                                         */
  60 /*--------------------------------------------------------------------------*/
  61 void
  62 gl_object_editor_prepare_position_page (glObjectEditor *editor)
  63 {
  64         lglUnits      units;
  65         const gchar  *units_string;
  66         gdouble       climb_rate;
  67         gint          digits;
  68
  69         gl_debug (DEBUG_EDITOR, "START");
  70
  71         /* Extract widgets from XML tree. */
  72         gl_builder_util_get_widgets (editor->priv->builder,
  73                                      "pos_page_vbox",     &editor->priv->pos_page_vbox,
  74                                      "pos_x_spin",        &editor->priv->pos_x_spin,
  75                                      "pos_y_spin",        &editor->priv->pos_y_spin,
  76                                      "pos_x_units_label", &editor->priv->pos_x_units_label,
  77                                      "pos_y_units_label", &editor->priv->pos_y_units_label,
  78                                      NULL);
  79
  80         /* Get configuration information */
  81         units = gl_prefs_model_get_units (gl_prefs);
  82         units_string = lgl_units_get_name (units);
  83         editor->priv->units_per_point = lgl_units_get_units_per_point (units);
  84         climb_rate = gl_units_util_get_step_size (units);
  85         digits = gl_units_util_get_precision (units);
  86
  87         /* Modify widgets based on configuration */
  88         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->pos_x_spin), digits);
  89         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->pos_x_spin),
  90                                         climb_rate, 10.0*climb_rate);
  91         gtk_label_set_text (GTK_LABEL(editor->priv->pos_x_units_label), units_string);
  92         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->pos_y_spin), digits);
  93         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->pos_y_spin),
  94                                         climb_rate, 10.0*climb_rate);
  95         gtk_label_set_text (GTK_LABEL(editor->priv->pos_y_units_label), units_string);
  96
  97         /* Un-hide */
  98         gtk_widget_show_all (editor->priv->pos_page_vbox);
  99
 100         /* Connect signals */
 101         g_signal_connect_swapped (G_OBJECT (editor->priv->pos_x_spin),
 102                                   "changed",
 103                                   G_CALLBACK (gl_object_editor_changed_cb),
 104                                   G_OBJECT (editor));
 105         g_signal_connect_swapped (G_OBJECT (editor->priv->pos_y_spin),
 106                                   "changed",
 107                                   G_CALLBACK (gl_object_editor_changed_cb),
 108                                   G_OBJECT (editor));
 109
 110         gl_debug (DEBUG_EDITOR, "END");
 111 }
 112
 113
 114 /*****************************************************************************/
 115 /* Set position.                                                             */
 116 /*****************************************************************************/
 117 void
 118 gl_object_editor_set_position (glObjectEditor      *editor,
 119                                  gdouble                x,
 120                                  gdouble                y)
 121 {
 122         gl_debug (DEBUG_EDITOR, "START");
 123
 124         editor->priv->stop_signals = TRUE;
 125
 126         /* save a copy in internal units */
 127         editor->priv->x = x;
 128         editor->priv->y = y;
 129
 130         /* convert internal units to displayed units */
 131         gl_debug (DEBUG_EDITOR, "internal x,y = %g, %g", x, y);
 132         x *= editor->priv->units_per_point;
 133         y *= editor->priv->units_per_point;
 134         gl_debug (DEBUG_EDITOR, "display x,y = %g, %g", x, y);
 135
 136         /* Set widget values */
 137         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->pos_x_spin), x);
 138         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->pos_y_spin), y);
 139
 140         editor->priv->stop_signals = FALSE;
 141
 142         gl_debug (DEBUG_EDITOR, "END");
 143 }
 144
 145
 146 /*****************************************************************************/
 147 /* Set maximum position.                                                     */
 148 /*****************************************************************************/
 149 void
 150 gl_object_editor_set_max_position (glObjectEditor      *editor,
 151                                      gdouble                x_max,
 152                                      gdouble                y_max)
 153 {
 154         gdouble tmp;
 155
 156         gl_debug (DEBUG_EDITOR, "START");
 157
 158         editor->priv->stop_signals = TRUE;
 159
 160         /* save a copy in internal units */
 161         editor->priv->x_max = x_max;
 162         editor->priv->y_max = y_max;
 163
 164         /* convert internal units to displayed units */
 165         gl_debug (DEBUG_EDITOR, "internal x_max,y_max = %g, %g", x_max, y_max);
 166         x_max *= editor->priv->units_per_point;
 167         y_max *= editor->priv->units_per_point;
 168         gl_debug (DEBUG_EDITOR, "display x_max,y_max = %g, %g", x_max, y_max);
 169
 170         /* Set widget values */
 171         tmp = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->pos_x_spin));
 172         gtk_spin_button_set_range (GTK_SPIN_BUTTON (editor->priv->pos_x_spin),
 173                                    -x_max, 2.0*x_max);
 174         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->pos_x_spin), tmp);
 175         tmp = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->pos_y_spin));
 176         gtk_spin_button_set_range (GTK_SPIN_BUTTON (editor->priv->pos_y_spin),
 177                                    -y_max, 2.0*y_max);
 178         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->pos_y_spin), tmp);
 179
 180         editor->priv->stop_signals = FALSE;
 181
 182         gl_debug (DEBUG_EDITOR, "END");
 183 }
 184
 185
 186 /*****************************************************************************/
 187 /* Query position.                                                           */
 188 /*****************************************************************************/
 189 void
 190 gl_object_editor_get_position (glObjectEditor      *editor,
 191                                  gdouble               *x,
 192                                  gdouble               *y)
 193 {
 194         gl_debug (DEBUG_EDITOR, "START");
 195
 196         /* Get values from widgets */
 197         *x = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->pos_x_spin));
 198         *y = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->pos_y_spin));
 199
 200         /* convert everything back to our internal units (points) */
 201         *x /= editor->priv->units_per_point;
 202         *y /= editor->priv->units_per_point;
 203
 204         /* save a copy in internal units */
 205         editor->priv->x = *x;
 206         editor->priv->y = *y;
 207
 208         gl_debug (DEBUG_EDITOR, "END");
 209 }
 210
 211
 212 /*****************************************************************************/
 213 /* PRIVATE. Prefs changed callback.  Update units related items.            */
 214 /*****************************************************************************/
 215 void
 216 position_prefs_changed_cb (glObjectEditor *editor)
 217 {
 218         lglUnits      units;
 219         const gchar  *units_string;
 220         gdouble       climb_rate;
 221         gint          digits;
 222
 223         gl_debug (DEBUG_EDITOR, "START");
 224
 225         /* Get new configuration information */
 226         units = gl_prefs_model_get_units (gl_prefs);
 227         units_string = lgl_units_get_name (units);
 228         editor->priv->units_per_point = lgl_units_get_units_per_point (units);
 229         climb_rate = gl_units_util_get_step_size (units);
 230         digits = gl_units_util_get_precision (units);
 231
 232         /* Update characteristics of x_spin/y_spin */
 233         editor->priv->stop_signals = TRUE;
 234         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->pos_x_spin),
 235                                     digits);
 236         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->pos_y_spin),
 237                                     digits);
 238         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->pos_x_spin),
 239                                         climb_rate, 10.0*climb_rate);
 240         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->pos_y_spin),
 241                                         climb_rate, 10.0*climb_rate);
 242         editor->priv->stop_signals = FALSE;
 243
 244         /* Update units_labels */
 245         gtk_label_set_text (GTK_LABEL(editor->priv->pos_x_units_label),
 246                             units_string);
 247         gtk_label_set_text (GTK_LABEL(editor->priv->pos_y_units_label),
 248                             units_string);
 249
 250         /* Update values of x_spin/y_spin */
 251         gl_object_editor_set_position (editor,
 252                                        editor->priv->x,
 253                                        editor->priv->y);
 254         gl_object_editor_set_max_position (editor,
 255                                            editor->priv->x_max,
 256                                            editor->priv->y_max);
 257
 258         gl_debug (DEBUG_EDITOR, "END");
 259 }
 260
 261
 262
 263 /*
 264  * Local Variables:       -- emacs
 265  * mode: C                -- emacs
 266  * c-basic-offset: 8      -- emacs
 267  * tab-width: 8           -- emacs
 268  * indent-tabs-mode: nil  -- emacs
 269  * End:                   -- emacs
 270  */