src/desktop-events.cpp

   1 #define __SP_DESKTOP_EVENTS_C__
   2
   3 /*
   4  * Event handlers for SPDesktop
   5  *
   6  * Author:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *
   9  * Copyright (C) 1999-2002 Lauris Kaplinski
  10  *
  11  * Released under GNU GPL, read the file 'COPYING' for more information
  12  */
  13
  14 #ifdef HAVE_CONFIG_H
  15 # include <config.h>
  16 #endif
  17 #include "display/guideline.h"
  18 #include "helper/unit-menu.h"
  19 #include "helper/units.h"
  20 #include "desktop.h"
  21 #include "document.h"
  22 #include "sp-guide.h"
  23 #include "sp-namedview.h"
  24 #include "desktop-handles.h"
  25 #include "event-context.h"
  26 #include "widgets/desktop-widget.h"
  27 #include "sp-metrics.h"
  28 #include <glibmm/i18n.h>
  29 #include "dialogs/dialog-events.h"
  30 #include "message-context.h"
  31 #include "xml/repr.h"
  32 #include "dialogs/guidelinedialog.h"
  33
  34 /* Root item handler */
  35
  36
  37 int sp_desktop_root_handler(SPCanvasItem *item, GdkEvent *event, SPDesktop *desktop)
  38 {
  39     return sp_event_context_root_handler(desktop->event_context, event);
  40 }
  41
  42 /*
  43  * fixme: this conatins a hack, to deal with deleting a view, which is
  44  * completely on another view, in which case active_desktop will not be updated
  45  *
  46  */
  47
  48 int sp_desktop_item_handler(SPCanvasItem *item, GdkEvent *event, gpointer data)
  49 {
  50     gpointer ddata = gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop");
  51     g_return_val_if_fail(ddata != NULL, FALSE);
  52
  53     SPDesktop *desktop = static_cast<SPDesktop*>(ddata);
  54
  55     return sp_event_context_item_handler(desktop->event_context, SP_ITEM(data), event);
  56 }
  57
  58
  59 static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
  60 {
  61     static bool dragging = false;
  62     static SPCanvasItem *guide = NULL;
  63     int wx, wy;
  64
  65     SPDesktop *desktop = dtw->desktop;
  66     Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);
  67
  68     gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
  69     NR::Point const event_win(wx, wy);
  70
  71     switch (event->type) {
  72         case GDK_BUTTON_PRESS:
  73             if (event->button.button == 1) {
  74                 dragging = true;
  75                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  76                 NR::Point const event_dt(desktop->w2d(event_w));
  77
  78                 // explicitly show guidelines; if I draw a guide, I want them on
  79                 sp_repr_set_boolean(repr, "showguides", TRUE);
  80                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
  81
  82                 double const guide_pos_dt = event_dt[ horiz
  83                                                       ? NR::Y
  84                                                       : NR::X ];
  85                 guide = sp_guideline_new(desktop->guides, guide_pos_dt, !horiz);
  86                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
  87                 gdk_pointer_grab(widget->window, FALSE,
  88                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
  89                                  NULL, NULL,
  90                                  event->button.time);
  91             }
  92             break;
  93         case GDK_MOTION_NOTIFY:
  94             if (dragging) {
  95                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  96                 NR::Point const event_dt(desktop->w2d(event_w));
  97                 double const guide_pos_dt = event_dt[ horiz
  98                                                       ? NR::Y
  99                                                       : NR::X ];
 100                 sp_guideline_set_position(SP_GUIDELINE(guide), guide_pos_dt);
 101                 desktop->set_coordinate_status(event_dt);
 102                 desktop->setPosition (event_dt);
 103             }
 104             break;
 105         case GDK_BUTTON_RELEASE:
 106             if (dragging && event->button.button == 1) {
 107                 gdk_pointer_ungrab(event->button.time);
 108                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 109                 NR::Point const event_dt(desktop->w2d(event_w));
 110                 dragging = false;
 111                 gtk_object_destroy(GTK_OBJECT(guide));
 112                 guide = NULL;
 113                 if ( ( horiz
 114                        ? wy
 115                        : wx )
 116                      >= 0 )
 117                 {
 118                     Inkscape::XML::Node *repr = sp_repr_new("sodipodi:guide");
 119                     repr->setAttribute("orientation", (horiz) ? "horizontal" : "vertical");
 120                     double const guide_pos_dt = event_dt[ horiz
 121                                                           ? NR::Y
 122                                                           : NR::X ];
 123                     sp_repr_set_svg_double(repr, "position", guide_pos_dt);
 124                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 125                     Inkscape::GC::release(repr);
 126                     sp_document_done(sp_desktop_document(desktop));
 127                 }
 128                 desktop->set_coordinate_status(event_dt);
 129             }
 130         default:
 131             break;
 132     }
 133
 134     return FALSE;
 135 }
 136
 137 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 138 {
 139     return sp_dt_ruler_event(widget, event, dtw, true);
 140 }
 141
 142 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 143 {
 144     return sp_dt_ruler_event(widget, event, dtw, false);
 145 }
 146
 147 /* Guides */
 148
 149 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 150 {
 151     static bool dragging = false;
 152     static bool moved = false;
 153     gint ret = FALSE;
 154
 155     SPGuide *guide = SP_GUIDE(data);
 156     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 157
 158     switch (event->type) {
 159         case GDK_2BUTTON_PRESS:
 160             if (event->button.button == 1) {
 161                 dragging = false;
 162                 sp_canvas_item_ungrab(item, event->button.time);
 163                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 164                 ret = TRUE;
 165             }
 166             break;
 167         case GDK_BUTTON_PRESS:
 168             if (event->button.button == 1) {
 169                 dragging = true;
 170                 sp_canvas_item_grab(item,
 171                                     ( GDK_BUTTON_RELEASE_MASK  |
 172                                       GDK_BUTTON_PRESS_MASK    |
 173                                       GDK_POINTER_MOTION_MASK ),
 174                                     NULL,
 175                                     event->button.time);
 176                 ret = TRUE;
 177             }
 178             break;
 179         case GDK_MOTION_NOTIFY:
 180             if (dragging) {
 181                 NR::Point const motion_w(event->motion.x,
 182                                          event->motion.y);
 183                 NR::Point const motion_dt(desktop->w2d(motion_w));
 184                 sp_guide_moveto(*guide, sp_guide_position_from_pt(guide, motion_dt), false);
 185                 moved = true;
 186                 desktop->set_coordinate_status(motion_dt);
 187                 desktop->setPosition (motion_dt);
 188                 ret = TRUE;
 189             }
 190             break;
 191         case GDK_BUTTON_RELEASE:
 192             if (dragging && event->button.button == 1) {
 193                 if (moved) {
 194                     NR::Point const event_w(event->button.x,
 195                                             event->button.y);
 196                     NR::Point const event_dt(desktop->w2d(event_w));
 197                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 198                         sp_guide_moveto(*guide, sp_guide_position_from_pt(guide, event_dt), true);
 199                     } else {
 200                         /* Undo movement of any attached shapes. */
 201                         sp_guide_moveto(*guide, guide->position, false);
 202                         sp_guide_remove(guide);
 203                     }
 204                     moved = false;
 205                     sp_document_done(sp_desktop_document(desktop));
 206                     desktop->set_coordinate_status(event_dt);
 207                     desktop->setPosition (event_dt);
 208                 }
 209                 dragging = false;
 210                 sp_canvas_item_ungrab(item, event->button.time);
 211                 ret=TRUE;
 212             }
 213         case GDK_ENTER_NOTIFY:
 214         {
 215
 216             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 217
 218             GString *position_string = SP_PX_TO_METRIC_STRING(guide->position, desktop->namedview->getDefaultMetric());
 219             char *guide_description = sp_guide_description(guide);
 220
 221             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("%s at %s"), guide_description, position_string->str);
 222
 223             g_free(guide_description);
 224             g_string_free(position_string, TRUE);
 225             break;
 226         }
 227         case GDK_LEAVE_NOTIFY:
 228             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 229             desktop->guidesMessageContext()->clear();
 230             break;
 231         default:
 232             break;
 233     }
 234
 235     return ret;
 236 }
 237
 238
 239 /*
 240   Local Variables:
 241   mode:c++
 242   c-file-style:"stroustrup"
 243   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 244   indent-tabs-mode:nil
 245   fill-column:99
 246   End:
 247 */
 248 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 249