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

   1 /*
   2  *  object-editor-lsize-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 #define LENGTH(x,y) sqrt( (x)*(x) + (y)*(y) )
  43 #define ANGLE(x,y)  ( (180.0/G_PI)*atan2( -(y), (x) ) )
  44 #define COMP_X(l,a) ( (l) * cos( (G_PI/180.0)*(a) ) )
  45 #define COMP_Y(l,a) ( -(l) * sin( (G_PI/180.0)*(a) ) )
  46
  47
  48 /*===========================================*/
  49 /* Private data types                        */
  50 /*===========================================*/
  51
  52
  53 /*===========================================*/
  54 /* Private globals                           */
  55 /*===========================================*/
  56
  57
  58 /*===========================================*/
  59 /* Local function prototypes                 */
  60 /*===========================================*/
  61
  62
  63 /*--------------------------------------------------------------------------*/
  64 /* PRIVATE.  Prepare line size page.                                        */
  65 /*--------------------------------------------------------------------------*/
  66 void
  67 gl_object_editor_prepare_lsize_page (glObjectEditor       *editor)
  68 {
  69         lglUnits      units;
  70         const gchar  *units_string;
  71         gdouble       climb_rate;
  72         gint          digits;
  73
  74         gl_debug (DEBUG_EDITOR, "START");
  75
  76         /* Extract widgets from XML tree. */
  77         gl_builder_util_get_widgets (editor->priv->builder,
  78                                      "lsize_page_vbox",     &editor->priv->lsize_page_vbox,
  79                                      "lsize_r_spin",        &editor->priv->lsize_r_spin,
  80                                      "lsize_theta_spin",    &editor->priv->lsize_theta_spin,
  81                                      "lsize_r_units_label", &editor->priv->lsize_r_units_label,
  82                                      NULL);
  83
  84         /* Get configuration information */
  85         units = gl_prefs_model_get_units (gl_prefs);
  86         units_string = lgl_units_get_name (units);
  87         editor->priv->units_per_point = lgl_units_get_units_per_point (units);
  88         climb_rate = gl_units_util_get_step_size (units);
  89         digits = gl_units_util_get_precision (units);
  90
  91         /* Modify widgets based on configuration */
  92         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin), digits);
  93         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin),
  94                                         climb_rate, 0);
  95         gtk_label_set_text (GTK_LABEL(editor->priv->lsize_r_units_label), units_string);
  96
  97         /* Un-hide */
  98         gtk_widget_show_all (editor->priv->lsize_page_vbox);
  99
 100         /* Connect signals */
 101         g_signal_connect_swapped (G_OBJECT (editor->priv->lsize_r_spin),
 102                                   "changed",
 103                                   G_CALLBACK (gl_object_editor_size_changed_cb),
 104                                   G_OBJECT (editor));
 105         g_signal_connect_swapped (G_OBJECT (editor->priv->lsize_theta_spin),
 106                                   "changed",
 107                                   G_CALLBACK (gl_object_editor_size_changed_cb),
 108                                   G_OBJECT (editor));
 109
 110         gl_debug (DEBUG_EDITOR, "END");
 111 }
 112
 113
 114 /*****************************************************************************/
 115 /* Set line size.                                                            */
 116 /*****************************************************************************/
 117 void
 118 gl_object_editor_set_lsize (glObjectEditor      *editor,
 119                             gdouble              dx,
 120                             gdouble              dy)
 121 {
 122         gdouble r, theta;
 123
 124         gl_debug (DEBUG_EDITOR, "START");
 125
 126         editor->priv->stop_signals = TRUE;
 127
 128         /* save a copy in internal units */
 129         editor->priv->dx = dx;
 130         editor->priv->dy = dy;
 131
 132         /* convert internal units to displayed units */
 133         gl_debug (DEBUG_EDITOR, "internal dx,dy = %g, %g", dx, dy);
 134         dx *= editor->priv->units_per_point;
 135         dy *= editor->priv->units_per_point;
 136         gl_debug (DEBUG_EDITOR, "display dx,dy = %g, %g", dx, dy);
 137
 138         r     = LENGTH (dx, dy);
 139         theta = ANGLE (dx, dy);
 140
 141         /* Set widget values */
 142         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin), r);
 143         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->lsize_theta_spin),
 144                                    theta);
 145
 146         editor->priv->stop_signals = FALSE;
 147
 148         gl_debug (DEBUG_EDITOR, "END");
 149 }
 150
 151
 152 /*****************************************************************************/
 153 /* Set maximum line size.                                                    */
 154 /*****************************************************************************/
 155 void
 156 gl_object_editor_set_max_lsize (glObjectEditor      *editor,
 157                                 gdouble              dx_max,
 158                                 gdouble              dy_max)
 159 {
 160         gdouble tmp;
 161
 162         gl_debug (DEBUG_EDITOR, "START");
 163
 164         if (editor->priv->lsize_page_vbox)
 165         {
 166
 167                 editor->priv->stop_signals = TRUE;
 168
 169                 /* save a copy in internal units */
 170                 editor->priv->dx_max = dx_max;
 171                 editor->priv->dy_max = dy_max;
 172
 173                 /* convert internal units to displayed units */
 174                 gl_debug (DEBUG_EDITOR, "internal dx_max,dy_max = %g, %g", dx_max, dy_max);
 175                 dx_max *= editor->priv->units_per_point;
 176                 dy_max *= editor->priv->units_per_point;
 177                 gl_debug (DEBUG_EDITOR, "display dx_max,dy_max = %g, %g", dx_max, dy_max);
 178
 179                 /* Set widget values */
 180                 tmp = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin));
 181                 gtk_spin_button_set_range (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin),
 182                                            0.0, 2.0*LENGTH (dx_max, dy_max));
 183                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin), tmp);
 184
 185                 editor->priv->stop_signals = FALSE;
 186
 187         }
 188
 189         gl_debug (DEBUG_EDITOR, "END");
 190 }
 191
 192
 193 /*****************************************************************************/
 194 /* Query line size.                                                          */
 195 /*****************************************************************************/
 196 void
 197 gl_object_editor_get_lsize (glObjectEditor      *editor,
 198                             gdouble             *dx,
 199                             gdouble             *dy)
 200 {
 201         gdouble r, theta;
 202
 203         gl_debug (DEBUG_EDITOR, "START");
 204
 205         /* Get values from widgets */
 206         r = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin));
 207         theta = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->lsize_theta_spin));
 208
 209         /* convert everything back to our internal units (points) */
 210         r /= editor->priv->units_per_point;
 211
 212         *dx = COMP_X (r, theta);
 213         *dy = COMP_Y (r, theta);
 214
 215         /* save a copy in internal units */
 216         editor->priv->dx = *dx;
 217         editor->priv->dy = *dy;
 218
 219         gl_debug (DEBUG_EDITOR, "END");
 220 }
 221
 222
 223 /*****************************************************************************/
 224 /* PRIVATE. Prefs changed callback.  Update units related items.            */
 225 /*****************************************************************************/
 226 void
 227 lsize_prefs_changed_cb (glObjectEditor *editor)
 228 {
 229         lglUnits      units;
 230         const gchar  *units_string;
 231         gdouble       climb_rate;
 232         gint          digits;
 233
 234         gl_debug (DEBUG_EDITOR, "START");
 235
 236         /* Get new configuration information */
 237         units = gl_prefs_model_get_units (gl_prefs);
 238         units_string = lgl_units_get_name (units);
 239         editor->priv->units_per_point = lgl_units_get_units_per_point (units);
 240         climb_rate = gl_units_util_get_step_size (units);
 241         digits = gl_units_util_get_precision (units);
 242
 243         /* Update characteristics of r_spin */
 244         editor->priv->stop_signals = TRUE;
 245         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin),
 246                                     digits);
 247         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin),
 248                                         climb_rate, 0);
 249         editor->priv->stop_signals = FALSE;
 250
 251         /* Update r_units_label */
 252         gtk_label_set_text (GTK_LABEL(editor->priv->lsize_r_units_label),
 253                             units_string);
 254
 255         /* Update values of r_spin/theta_spin */
 256         gl_object_editor_set_lsize (editor,
 257                                     editor->priv->dx,
 258                                     editor->priv->dy);
 259         gl_object_editor_set_max_lsize (editor,
 260                                         editor->priv->dx_max,
 261                                         editor->priv->dy_max);
 262
 263         gl_debug (DEBUG_EDITOR, "END");
 264 }
 265
 266
 267
 268 /*
 269  * Local Variables:       -- emacs
 270  * mode: C                -- emacs
 271  * c-basic-offset: 8      -- emacs
 272  * tab-width: 8           -- emacs
 273  * indent-tabs-mode: nil  -- emacs
 274  * End:                   -- emacs
 275  */