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
  32 #include "object-editor-private.h"
  33
  34 #include "debug.h"
  35
  36
  37 /*===========================================*/
  38 /* Private macros                            */
  39 /*===========================================*/
  40
  41 #define LENGTH(x,y) sqrt( (x)*(x) + (y)*(y) )
  42 #define ANGLE(x,y)  ( (180.0/G_PI)*atan2( -(y), (x) ) )
  43 #define COMP_X(l,a) ( (l) * cos( (G_PI/180.0)*(a) ) )
  44 #define COMP_Y(l,a) ( -(l) * sin( (G_PI/180.0)*(a) ) )
  45
  46
  47 /*===========================================*/
  48 /* Private data types                        */
  49 /*===========================================*/
  50
  51
  52 /*===========================================*/
  53 /* Private globals                           */
  54 /*===========================================*/
  55
  56
  57 /*===========================================*/
  58 /* Local function prototypes                 */
  59 /*===========================================*/
  60
  61
  62 /*--------------------------------------------------------------------------*/
  63 /* PRIVATE.  Prepare line size page.                                        */
  64 /*--------------------------------------------------------------------------*/
  65 void
  66 gl_object_editor_prepare_lsize_page (glObjectEditor       *editor)
  67 {
  68         const gchar  *units_string;
  69         gdouble       climb_rate;
  70         gint          digits;
  71
  72         gl_debug (DEBUG_EDITOR, "START");
  73
  74         /* Extract widgets from XML tree. */
  75         gl_builder_util_get_widgets (editor->priv->builder,
  76                                      "lsize_page_vbox",     &editor->priv->lsize_page_vbox,
  77                                      "lsize_r_spin",        &editor->priv->lsize_r_spin,
  78                                      "lsize_theta_spin",    &editor->priv->lsize_theta_spin,
  79                                      "lsize_r_units_label", &editor->priv->lsize_r_units_label,
  80                                      NULL);
  81
  82         /* Get configuration information */
  83         units_string = gl_prefs_get_units_string ();
  84         editor->priv->units_per_point = gl_prefs_get_units_per_point ();
  85         climb_rate = gl_prefs_get_units_step_size ();
  86         digits = gl_prefs_get_units_precision ();
  87
  88         /* Modify widgets based on configuration */
  89         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin), digits);
  90         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin),
  91                                         climb_rate, 0);
  92         gtk_label_set_text (GTK_LABEL(editor->priv->lsize_r_units_label), units_string);
  93
  94         /* Un-hide */
  95         gtk_widget_show_all (editor->priv->lsize_page_vbox);
  96
  97         /* Connect signals */
  98         g_signal_connect_swapped (G_OBJECT (editor->priv->lsize_r_spin),
  99                                   "changed",
 100                                   G_CALLBACK (gl_object_editor_changed_cb),
 101                                   G_OBJECT (editor));
 102         g_signal_connect_swapped (G_OBJECT (editor->priv->lsize_theta_spin),
 103                                   "changed",
 104                                   G_CALLBACK (gl_object_editor_changed_cb),
 105                                   G_OBJECT (editor));
 106
 107         gl_debug (DEBUG_EDITOR, "END");
 108 }
 109
 110
 111 /*****************************************************************************/
 112 /* Set line size.                                                            */
 113 /*****************************************************************************/
 114 void
 115 gl_object_editor_set_lsize (glObjectEditor      *editor,
 116                             gdouble              dx,
 117                             gdouble              dy)
 118 {
 119         gdouble r, theta;
 120
 121         gl_debug (DEBUG_EDITOR, "START");
 122
 123         editor->priv->stop_signals = TRUE;
 124
 125         /* save a copy in internal units */
 126         editor->priv->dx = dx;
 127         editor->priv->dy = dy;
 128
 129         /* convert internal units to displayed units */
 130         gl_debug (DEBUG_EDITOR, "internal dx,dy = %g, %g", dx, dy);
 131         dx *= editor->priv->units_per_point;
 132         dy *= editor->priv->units_per_point;
 133         gl_debug (DEBUG_EDITOR, "display dx,dy = %g, %g", dx, dy);
 134
 135         r     = LENGTH (dx, dy);
 136         theta = ANGLE (dx, dy);
 137
 138         /* Set widget values */
 139         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin), r);
 140         gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->lsize_theta_spin),
 141                                    theta);
 142
 143         editor->priv->stop_signals = FALSE;
 144
 145         gl_debug (DEBUG_EDITOR, "END");
 146 }
 147
 148
 149 /*****************************************************************************/
 150 /* Set maximum line size.                                                    */
 151 /*****************************************************************************/
 152 void
 153 gl_object_editor_set_max_lsize (glObjectEditor      *editor,
 154                                 gdouble              dx_max,
 155                                 gdouble              dy_max)
 156 {
 157         gdouble tmp;
 158
 159         gl_debug (DEBUG_EDITOR, "START");
 160
 161         if (editor->priv->lsize_page_vbox)
 162         {
 163
 164                 editor->priv->stop_signals = TRUE;
 165
 166                 /* save a copy in internal units */
 167                 editor->priv->dx_max = dx_max;
 168                 editor->priv->dy_max = dy_max;
 169
 170                 /* convert internal units to displayed units */
 171                 gl_debug (DEBUG_EDITOR, "internal dx_max,dy_max = %g, %g", dx_max, dy_max);
 172                 dx_max *= editor->priv->units_per_point;
 173                 dy_max *= editor->priv->units_per_point;
 174                 gl_debug (DEBUG_EDITOR, "display dx_max,dy_max = %g, %g", dx_max, dy_max);
 175
 176                 /* Set widget values */
 177                 tmp = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin));
 178                 gtk_spin_button_set_range (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin),
 179                                            0.0, 2.0*LENGTH (dx_max, dy_max));
 180                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin), tmp);
 181
 182                 editor->priv->stop_signals = FALSE;
 183
 184         }
 185
 186         gl_debug (DEBUG_EDITOR, "END");
 187 }
 188
 189
 190 /*****************************************************************************/
 191 /* Query line size.                                                          */
 192 /*****************************************************************************/
 193 void
 194 gl_object_editor_get_lsize (glObjectEditor      *editor,
 195                             gdouble             *dx,
 196                             gdouble             *dy)
 197 {
 198         gdouble r, theta;
 199
 200         gl_debug (DEBUG_EDITOR, "START");
 201
 202         /* Get values from widgets */
 203         r = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin));
 204         theta = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->lsize_theta_spin));
 205
 206         /* convert everything back to our internal units (points) */
 207         r /= editor->priv->units_per_point;
 208
 209         *dx = COMP_X (r, theta);
 210         *dy = COMP_Y (r, theta);
 211
 212         /* save a copy in internal units */
 213         editor->priv->dx = *dx;
 214         editor->priv->dy = *dy;
 215
 216         gl_debug (DEBUG_EDITOR, "END");
 217 }
 218
 219
 220 /*****************************************************************************/
 221 /* PRIVATE. Prefs changed callback.  Update units related items.            */
 222 /*****************************************************************************/
 223 void
 224 lsize_prefs_changed_cb (glObjectEditor *editor)
 225 {
 226         const gchar  *units_string;
 227         gdouble       climb_rate;
 228         gint          digits;
 229
 230         gl_debug (DEBUG_EDITOR, "START");
 231
 232         /* Get new configuration information */
 233         units_string = gl_prefs_get_units_string ();
 234         editor->priv->units_per_point = gl_prefs_get_units_per_point ();
 235         climb_rate = gl_prefs_get_units_step_size ();
 236         digits = gl_prefs_get_units_precision ();
 237
 238         /* Update characteristics of r_spin */
 239         editor->priv->stop_signals = TRUE;
 240         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin),
 241                                     digits);
 242         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin),
 243                                         climb_rate, 0);
 244         editor->priv->stop_signals = FALSE;
 245
 246         /* Update r_units_label */
 247         gtk_label_set_text (GTK_LABEL(editor->priv->lsize_r_units_label),
 248                             units_string);
 249
 250         /* Update values of r_spin/theta_spin */
 251         gl_object_editor_set_lsize (editor,
 252                                     editor->priv->dx,
 253                                     editor->priv->dy);
 254         gl_object_editor_set_max_lsize (editor,
 255                                         editor->priv->dx_max,
 256                                         editor->priv->dy_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  */