git.sur5r.net Git - glabels/blob - glabels2/src/object-editor-lsize-page.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
   2
   3 /*
   4  *  (GLABELS) Label and Business Card Creation program for GNOME
   5  *
   6  *  object-editor.c:  object properties editor module
   7  *
   8  *  Copyright (C) 2003  Jim Evins <evins@snaught.com>.
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  */
  24 #include <config.h>
  25
  26 #include "object-editor.h"
  27
  28 #include <glib/gi18n.h>
  29 #include <gtk/gtklabel.h>
  30 #include <gtk/gtkspinbutton.h>
  31 #include <math.h>
  32
  33 #include "prefs.h"
  34
  35 #include "object-editor-private.h"
  36
  37 #include "debug.h"
  38
  39 /*===========================================*/
  40 /* Private macros                            */
  41 /*===========================================*/
  42
  43 #define LENGTH(x,y) sqrt( (x)*(x) + (y)*(y) )
  44 #define ANGLE(x,y)  ( (180.0/G_PI)*atan2( -(y), (x) ) )
  45 #define COMP_X(l,a) ( (l) * cos( (G_PI/180.0)*(a) ) )
  46 #define COMP_Y(l,a) ( -(l) * sin( (G_PI/180.0)*(a) ) )
  47
  48
  49 /*===========================================*/
  50 /* Private data types                        */
  51 /*===========================================*/
  52
  53 /*===========================================*/
  54 /* Private globals                           */
  55 /*===========================================*/
  56
  57 /*===========================================*/
  58 /* Local function prototypes                 */
  59 /*===========================================*/
  60
  61
  62 \f
  63 /*--------------------------------------------------------------------------*/
  64 /* PRIVATE.  Prepare line size page.                                        */
  65 /*--------------------------------------------------------------------------*/
  66 void
  67 gl_object_editor_prepare_lsize_page (glObjectEditor       *editor)
  68 {
  69         const gchar  *units_string;
  70         gdouble       climb_rate;
  71         gint          digits;
  72
  73         gl_debug (DEBUG_EDITOR, "START");
  74
  75         /* Extract widgets from XML tree. */
  76         gl_util_get_builder_widgets (editor->priv->gui,
  77                                      "lsize_page_vbox",     &editor->priv->lsize_page_vbox,
  78                                      "lsize_r_spin",        &editor->priv->lsize_r_spin,
  79                                      "lsize_theta_spin",    &editor->priv->lsize_theta_spin,
  80                                      "lsize_r_units_label", &editor->priv->lsize_r_units_label,
  81                                      NULL);
  82
  83         /* Get configuration information */
  84         units_string = gl_prefs_get_units_string ();
  85         editor->priv->units_per_point = gl_prefs_get_units_per_point ();
  86         climb_rate = gl_prefs_get_units_step_size ();
  87         digits = gl_prefs_get_units_precision ();
  88
  89         /* Modify widgets based on configuration */
  90         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin), digits);
  91         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin),
  92                                         climb_rate, 0);
  93         gtk_label_set_text (GTK_LABEL(editor->priv->lsize_r_units_label), units_string);
  94
  95         /* Un-hide */
  96         gtk_widget_show_all (editor->priv->lsize_page_vbox);
  97
  98         /* Connect signals */
  99         g_signal_connect_swapped (G_OBJECT (editor->priv->lsize_r_spin),
 100                                   "changed",
 101                                   G_CALLBACK (gl_object_editor_changed_cb),
 102                                   G_OBJECT (editor));
 103         g_signal_connect_swapped (G_OBJECT (editor->priv->lsize_theta_spin),
 104                                   "changed",
 105                                   G_CALLBACK (gl_object_editor_changed_cb),
 106                                   G_OBJECT (editor));
 107
 108         gl_debug (DEBUG_EDITOR, "END");
 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 /* Set maximum line size.                                                    */
 150 /*****************************************************************************/
 151 void
 152 gl_object_editor_set_max_lsize (glObjectEditor      *editor,
 153                                 gdouble              dx_max,
 154                                 gdouble              dy_max)
 155 {
 156         gdouble tmp;
 157
 158         gl_debug (DEBUG_EDITOR, "START");
 159
 160         if (editor->priv->lsize_page_vbox)
 161         {
 162
 163                 editor->priv->stop_signals = TRUE;
 164
 165                 /* save a copy in internal units */
 166                 editor->priv->dx_max = dx_max;
 167                 editor->priv->dy_max = dy_max;
 168
 169                 /* convert internal units to displayed units */
 170                 gl_debug (DEBUG_EDITOR, "internal dx_max,dy_max = %g, %g", dx_max, dy_max);
 171                 dx_max *= editor->priv->units_per_point;
 172                 dy_max *= editor->priv->units_per_point;
 173                 gl_debug (DEBUG_EDITOR, "display dx_max,dy_max = %g, %g", dx_max, dy_max);
 174
 175                 /* Set widget values */
 176                 tmp = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin));
 177                 gtk_spin_button_set_range (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin),
 178                                            0.0, 2.0*LENGTH (dx_max, dy_max));
 179                 gtk_spin_button_set_value (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin), tmp);
 180
 181                 editor->priv->stop_signals = FALSE;
 182
 183         }
 184
 185         gl_debug (DEBUG_EDITOR, "END");
 186 }
 187
 188 /*****************************************************************************/
 189 /* Query line size.                                                          */
 190 /*****************************************************************************/
 191 void
 192 gl_object_editor_get_lsize (glObjectEditor      *editor,
 193                             gdouble             *dx,
 194                             gdouble             *dy)
 195 {
 196         gdouble r, theta;
 197
 198         gl_debug (DEBUG_EDITOR, "START");
 199
 200         /* Get values from widgets */
 201         r = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->lsize_r_spin));
 202         theta = gtk_spin_button_get_value (GTK_SPIN_BUTTON (editor->priv->lsize_theta_spin));
 203
 204         /* convert everything back to our internal units (points) */
 205         r /= editor->priv->units_per_point;
 206
 207         *dx = COMP_X (r, theta);
 208         *dy = COMP_Y (r, theta);
 209
 210         /* save a copy in internal units */
 211         editor->priv->dx = *dx;
 212         editor->priv->dy = *dy;
 213
 214         gl_debug (DEBUG_EDITOR, "END");
 215 }
 216
 217 /*****************************************************************************/
 218 /* PRIVATE. Prefs changed callback.  Update units related items.            */
 219 /*****************************************************************************/
 220 void
 221 lsize_prefs_changed_cb (glObjectEditor *editor)
 222 {
 223         const gchar  *units_string;
 224         gdouble       climb_rate;
 225         gint          digits;
 226
 227         gl_debug (DEBUG_EDITOR, "START");
 228
 229         /* Get new configuration information */
 230         units_string = gl_prefs_get_units_string ();
 231         editor->priv->units_per_point = gl_prefs_get_units_per_point ();
 232         climb_rate = gl_prefs_get_units_step_size ();
 233         digits = gl_prefs_get_units_precision ();
 234
 235         /* Update characteristics of r_spin */
 236         editor->priv->stop_signals = TRUE;
 237         gtk_spin_button_set_digits (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin),
 238                                     digits);
 239         gtk_spin_button_set_increments (GTK_SPIN_BUTTON(editor->priv->lsize_r_spin),
 240                                         climb_rate, 0);
 241         editor->priv->stop_signals = FALSE;
 242
 243         /* Update r_units_label */
 244         gtk_label_set_text (GTK_LABEL(editor->priv->lsize_r_units_label),
 245                             units_string);
 246
 247         /* Update values of r_spin/theta_spin */
 248         gl_object_editor_set_lsize (editor,
 249                                     editor->priv->dx,
 250                                     editor->priv->dy);
 251         gl_object_editor_set_max_lsize (editor,
 252                                         editor->priv->dx_max,
 253                                         editor->priv->dy_max);
 254
 255         gl_debug (DEBUG_EDITOR, "END");
 256 }
 257