app/display.h

   1 /* Dia -- an diagram creation/manipulation program
   2  * Copyright (C) 1998 Alexander Larsson
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18 #ifndef DDISPLAY_H
  19 #define DDISPLAY_H
  20
  21 #include <gtk/gtk.h>
  22 #include <gtk/gtkimcontext.h>
  23
  24 typedef struct _DDisplay DDisplay;
  25
  26 #include "geometry.h"
  27 #include "diagram.h"
  28 #include "grid.h"
  29 #include "menus.h"
  30 #include "diarenderer.h"
  31
  32 /** Defines the pixels per cm, default is 20 pixels = 1 cm */
  33 /** This is close to, but not quite the same as, the physical display size
  34  * in most cases */
  35
  36 #define DDISPLAY_MAX_ZOOM 500.0
  37 #define DDISPLAY_NORMAL_ZOOM 20.0
  38 #define DDISPLAY_MIN_ZOOM 1.0
  39
  40 /* The zoom amount should be uniform.  Pixels per cm should be defined by the
  41  * renderer alone.  But that'd take a lot of fiddling in renderers. */
  42 /*
  43 #define DDISPLAY_MAX_ZOOM 100.0
  44 #define DDISPLAY_NORMAL_ZOOM 1.0
  45 #define DDISPLAY_MIN_ZOOM 0.01
  46 */
  47 struct _DDisplay {
  48   Diagram *diagram;               /* pointer to the associated diagram */
  49
  50   GtkWidget *shell;               /* shell widget for this ddisplay    */
  51   GtkWidget *canvas;              /* canvas widget for this ddisplay   */
  52   GtkWidget *hsb, *vsb;           /* widgets for scroll bars           */
  53   GtkWidget *hrule, *vrule;       /* widgets for rulers                */
  54   GtkWidget *origin;              /* widgets for rulers                */
  55   GtkWidget *menu_bar;            /* widget for the menu bar           */
  56   GtkItemFactory *mbar_item_factory; /* item factory used to create the menu bar */
  57
  58   /* menu bar widgets */
  59   GtkMenuItem *rulers;
  60   GtkMenuItem *visible_grid;
  61   GtkMenuItem *snap_to_grid;
  62   GtkMenuItem *show_cx_pts_mitem;
  63 #ifdef HAVE_LIBART
  64   GtkMenuItem *antialiased;
  65 #endif
  66   UpdatableMenuItems updatable_menu_items;
  67
  68
  69   GtkWidget *zoom_status;
  70   GtkWidget *grid_status;
  71   GtkWidget *modified_status;
  72
  73   GtkAccelGroup *accel_group;
  74
  75   GtkAdjustment *hsbdata;         /* horizontal data information       */
  76   GtkAdjustment *vsbdata;         /* vertical data information         */
  77
  78   Point origo;                    /* The origo (lower left) position   */
  79   real zoom_factor;               /* zoom, 20.0 means 20 pixel == 1 cm */
  80   Rectangle visible;              /* The part visible in this display  */
  81
  82   Grid grid;                      /* the grid in this display          */
  83
  84   gboolean show_cx_pts;           /* Connection points toggle boolean  */
  85   gboolean autoscroll;
  86
  87   int aa_renderer;
  88   DiaRenderer *renderer;
  89
  90   GSList *update_areas;           /* Update areas list                 */
  91   GSList *display_areas;          /* Display areas list                */
  92   guint update_id;                /* idle handler ID for redraws       */
  93
  94   GtkIMContext *im_context;
  95 };
  96
  97 extern GdkCursor *default_cursor;
  98
  99 DDisplay *new_display(Diagram *dia);
 100 /* Normal destroy is done through shell widget destroy event. */
 101 void ddisplay_really_destroy(DDisplay *ddisp);
 102 void ddisplay_transform_coords_double(DDisplay *ddisp,
 103                                       coord x, coord y,
 104                                       double *xi, double *yi);
 105 void ddisplay_transform_coords(DDisplay *ddisp,
 106                                coord x, coord y,
 107                                int *xi, int *yi);
 108 void ddisplay_untransform_coords(DDisplay *ddisp,
 109                                  int xi, int yi,
 110                                  coord *x, coord *y);
 111 real ddisplay_transform_length(DDisplay *ddisp, real len);
 112 real ddisplay_untransform_length(DDisplay *ddisp, real len);
 113 void ddisplay_add_update_pixels(DDisplay *ddisp, Point *point,
 114                                        int pixel_width, int pixel_height);
 115 void ddisplay_add_update_all(DDisplay *ddisp);
 116 void ddisplay_add_update(DDisplay *ddisp, Rectangle *rect);
 117 void ddisplay_add_display_area(DDisplay *ddisp,
 118                                int left, int top,
 119                                int right, int bottom);
 120 void ddisplay_flush(DDisplay *ddisp);
 121 void ddisplay_update_scrollbars(DDisplay *ddisp);
 122 void ddisplay_set_origo(DDisplay *ddisp,
 123                         coord x, coord y);
 124 void ddisplay_zoom(DDisplay *ddisp, Point *point,
 125                    real zoom_factor);
 126 void ddisplay_set_snap_to_grid(DDisplay *ddisp, gboolean snap);
 127 void ddisplay_set_renderer(DDisplay *ddisp, int aa_renderer);
 128 void ddisplay_resize_canvas(DDisplay *ddisp,
 129                             int width,
 130                             int height);
 131
 132 void ddisplay_render_pixmap(DDisplay *ddisp, Rectangle *update);
 133
 134 DDisplay *ddisplay_active(void);
 135 Diagram *ddisplay_active_diagram(void);
 136
 137 void ddisplay_close(DDisplay *ddisp);
 138
 139 void ddisplay_set_title(DDisplay *ddisp, char *title);
 140 void ddisplay_set_cursor(DDisplay *ddisp, GdkCursor *cursor);
 141 void ddisplay_set_all_cursor(GdkCursor *cursor);
 142
 143 gboolean ddisplay_scroll(DDisplay *ddisp, Point *delta);
 144 gboolean ddisplay_autoscroll(DDisplay *ddisp, int x, int y);
 145 void ddisplay_scroll_up(DDisplay *ddisp);
 146 void ddisplay_scroll_down(DDisplay *ddisp);
 147 void ddisplay_scroll_left(DDisplay *ddisp);
 148 void ddisplay_scroll_right(DDisplay *ddisp);
 149 gboolean ddisplay_scroll_center_point(DDisplay *ddisp, Point *p);
 150 gboolean ddisplay_scroll_to_object(DDisplay *ddisp, Object *obj);
 151
 152 void display_update_menu_state(DDisplay *ddisp);
 153 void ddisplay_update_statusbar(DDisplay *ddisp);
 154 void ddisplay_do_update_menu_sensitivity (DDisplay *ddisp);
 155
 156 void display_set_active(DDisplay *ddisp);
 157
 158 #endif /* DDISPLAY_H */