git.sur5r.net Git - glabels/blob - src/view.h

   1 /*
   2  *  view.h
   3  *  Copyright (C) 2001-2009  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 #ifndef __VIEW_H__
  22 #define __VIEW_H__
  23
  24 #include <gtk/gtk.h>
  25
  26 #include "label-object.h"
  27
  28 typedef enum {
  29         GL_VIEW_MODE_ARROW,
  30         GL_VIEW_MODE_OBJECT_CREATE
  31 } glViewMode;
  32
  33 typedef enum {
  34         GL_VIEW_IDLE = 0,
  35         GL_VIEW_ARROW_SELECT_REGION,
  36         GL_VIEW_ARROW_MOVE,
  37         GL_VIEW_ARROW_RESIZE,
  38         GL_VIEW_CREATE_DRAG
  39 } glViewState;
  40
  41 #define GL_TYPE_VIEW            (gl_view_get_type ())
  42 #define GL_VIEW(obj) \
  43         (G_TYPE_CHECK_INSTANCE_CAST((obj), GL_TYPE_VIEW, glView ))
  44 #define GL_VIEW_CLASS(klass) \
  45         (G_TYPE_CHECK_CLASS_CAST ((klass), GL_TYPE_VIEW, glViewClass))
  46 #define GL_IS_VIEW(obj) \
  47         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GL_TYPE_VIEW))
  48 #define GL_IS_VIEW_CLASS(klass) \
  49         (G_TYPE_CHECK_CLASS_TYPE ((klass), GL_TYPE_VIEW))
  50
  51 typedef struct _glView      glView;
  52 typedef struct _glViewClass glViewClass;
  53
  54
  55
  56 struct _glView {
  57         GtkVBox             parent_widget;
  58
  59         glLabel            *label;
  60
  61         GtkWidget          *canvas;
  62         gdouble             zoom;
  63         gboolean            zoom_to_fit_flag;
  64         gdouble             home_scale;
  65         gdouble             x0, y0;
  66         gdouble             w, h;
  67
  68         gboolean            update_scheduled_flag;
  69         gboolean            grid_visible;
  70         gdouble             grid_spacing;
  71
  72         gboolean            markup_visible;
  73
  74         glViewMode          mode;
  75         glLabelObjectType   create_type;
  76         glViewState         state;
  77         gboolean            grabbed_flag;
  78
  79         /* GL_VIEW_ARROW_MOVE state */
  80         gdouble             move_last_x;
  81         gdouble             move_last_y;
  82         gdouble             saved_x;
  83         gdouble             saved_y;
  84
  85         /* GL_VIEW_ARROW_SELECT_REGION state */
  86         gboolean            select_region_visible;
  87         glLabelRegion       select_region;
  88
  89         /* GL_VIEW_ARROW_RESIZE state */
  90         glLabelObject      *resize_object;
  91         glLabelObjectHandle resize_handle;
  92         gdouble             saved_ratio;
  93         gdouble             saved_w;
  94         gdouble             saved_h;
  95
  96         /* GL_VIEW_CREATE_DRAG state */
  97         glLabelObject      *create_object;
  98         gdouble             create_x0;
  99         gdouble             create_y0;
 100 };
 101
 102 struct _glViewClass {
 103         GtkVBoxClass      parent_class;
 104
 105         /* Signal to launch a context menu */
 106         void (*context_menu_activate) (glView   *view,
 107                                        gint      button,
 108                                        guint32   activate_time,
 109                                        gpointer  user_data);
 110
 111         /* Signals to support a status bar */
 112         void (*zoom_changed)      (glView   *view,
 113                                    gdouble   zoom,
 114                                    gpointer  user_data);
 115         void (*pointer_moved)     (glView   *view,
 116                                    gdouble   x,
 117                                    gdouble   y,
 118                                    gpointer  user_data);
 119         void (*pointer_exit)      (glView   *view,
 120                                    gpointer  user_data);
 121         void (*mode_changed)      (glView   *view,
 122                                    gpointer  user_data);
 123 };
 124
 125 G_BEGIN_DECLS
 126
 127 GType      gl_view_get_type                (void) G_GNUC_CONST;
 128
 129 GtkWidget *gl_view_new                     (glLabel           *label);
 130
 131
 132 void       gl_view_update                  (glView            *view);
 133
 134 void       gl_view_update_region           (glView            *view,
 135                                             cairo_t           *cr,
 136                                             glLabelRegion     *region);
 137
 138 void       gl_view_show_grid               (glView            *view);
 139
 140 void       gl_view_hide_grid               (glView            *view);
 141
 142 void       gl_view_show_markup             (glView            *view);
 143
 144 void       gl_view_hide_markup             (glView            *view);
 145
 146 void       gl_view_arrow_mode              (glView            *view);
 147
 148 void       gl_view_object_create_mode      (glView            *view,
 149                                             glLabelObjectType  type);
 150
 151
 152 void       gl_view_zoom_in                 (glView            *view);
 153
 154 void       gl_view_zoom_out                (glView            *view);
 155
 156 void       gl_view_zoom_to_fit             (glView            *view);
 157
 158 void       gl_view_set_zoom                (glView            *view,
 159                                             gdouble            zoom);
 160
 161 gdouble    gl_view_get_zoom                (glView            *view);
 162
 163 gboolean   gl_view_is_zoom_max             (glView            *view);
 164
 165 gboolean   gl_view_is_zoom_min             (glView            *view);
 166
 167
 168
 169
 170 G_END_DECLS
 171
 172 #endif
 173
 174
 175
 176 /*
 177  * Local Variables:       -- emacs
 178  * mode: C                -- emacs
 179  * c-basic-offset: 8      -- emacs
 180  * tab-width: 8           -- emacs
 181  * indent-tabs-mode: nil  -- emacs
 182  * End:                   -- emacs
 183  */