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 int sp_desktop_root_handler(SPCanvasItem *item, GdkEvent *event, SPDesktop *desktop)
  37 {
  38     return sp_event_context_root_handler(desktop->event_context, event);
  39 }
  40
  41
  42 static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
  43 {
  44     static bool dragging = false;
  45     static SPCanvasItem *guide = NULL;
  46     int wx, wy;
  47
  48     SPDesktop *desktop = dtw->desktop;
  49     Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);
  50
  51     gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
  52     NR::Point const event_win(wx, wy);
  53
  54     switch (event->type) {
  55         case GDK_BUTTON_PRESS:
  56             if (event->button.button == 1) {
  57                 dragging = true;
  58                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  59                 NR::Point const event_dt(desktop->w2d(event_w));
  60
  61                 // explicitly show guidelines; if I draw a guide, I want them on
  62                 sp_repr_set_boolean(repr, "showguides", TRUE);
  63                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
  64
  65                 double const guide_pos_dt = event_dt[ horiz
  66                                                       ? NR::Y
  67                                                       : NR::X ];
  68                 guide = sp_guideline_new(desktop->guides, guide_pos_dt, !horiz);
  69                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
  70                 gdk_pointer_grab(widget->window, FALSE,
  71                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
  72                                  NULL, NULL,
  73                                  event->button.time);
  74             }
  75             break;
  76         case GDK_MOTION_NOTIFY:
  77             if (dragging) {
  78                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  79                 NR::Point const event_dt(desktop->w2d(event_w));
  80                 double const guide_pos_dt = event_dt[ horiz
  81                                                       ? NR::Y
  82                                                       : NR::X ];
  83                 sp_guideline_set_position(SP_GUIDELINE(guide), guide_pos_dt);
  84                 desktop->set_coordinate_status(event_dt);
  85                 desktop->setPosition (event_dt);
  86             }
  87             break;
  88         case GDK_BUTTON_RELEASE:
  89             if (dragging && event->button.button == 1) {
  90                 gdk_pointer_ungrab(event->button.time);
  91                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  92                 NR::Point const event_dt(desktop->w2d(event_w));
  93                 dragging = false;
  94                 gtk_object_destroy(GTK_OBJECT(guide));
  95                 guide = NULL;
  96                 if ( ( horiz
  97                        ? wy
  98                        : wx )
  99                      >= 0 )
 100                 {
 101                     Inkscape::XML::Node *repr = sp_repr_new("sodipodi:guide");
 102                     repr->setAttribute("orientation", (horiz) ? "horizontal" : "vertical");
 103                     double const guide_pos_dt = event_dt[ horiz
 104                                                           ? NR::Y
 105                                                           : NR::X ];
 106                     sp_repr_set_svg_double(repr, "position", guide_pos_dt);
 107                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 108                     Inkscape::GC::release(repr);
 109                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 110                                      _("Create guide"));
 111                 }
 112                 desktop->set_coordinate_status(event_dt);
 113             }
 114         default:
 115             break;
 116     }
 117
 118     return FALSE;
 119 }
 120
 121 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 122 {
 123     return sp_dt_ruler_event(widget, event, dtw, true);
 124 }
 125
 126 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 127 {
 128     return sp_dt_ruler_event(widget, event, dtw, false);
 129 }
 130
 131 /* Guides */
 132
 133 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 134 {
 135     static bool dragging = false;
 136     static bool moved = false;
 137     gint ret = FALSE;
 138
 139     SPGuide *guide = SP_GUIDE(data);
 140     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 141
 142     switch (event->type) {
 143         case GDK_2BUTTON_PRESS:
 144             if (event->button.button == 1) {
 145                 dragging = false;
 146                 sp_canvas_item_ungrab(item, event->button.time);
 147                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 148                 ret = TRUE;
 149             }
 150             break;
 151         case GDK_BUTTON_PRESS:
 152             if (event->button.button == 1) {
 153                 dragging = true;
 154                 sp_canvas_item_grab(item,
 155                                     ( GDK_BUTTON_RELEASE_MASK  |
 156                                       GDK_BUTTON_PRESS_MASK    |
 157                                       GDK_POINTER_MOTION_MASK ),
 158                                     NULL,
 159                                     event->button.time);
 160                 ret = TRUE;
 161             }
 162             break;
 163         case GDK_MOTION_NOTIFY:
 164             if (dragging) {
 165                 NR::Point const motion_w(event->motion.x,
 166                                          event->motion.y);
 167                 NR::Point const motion_dt(desktop->w2d(motion_w));
 168                 sp_guide_moveto(*guide, sp_guide_position_from_pt(guide, motion_dt), false);
 169                 moved = true;
 170                 desktop->set_coordinate_status(motion_dt);
 171                 desktop->setPosition (motion_dt);
 172                 ret = TRUE;
 173             }
 174             break;
 175         case GDK_BUTTON_RELEASE:
 176             if (dragging && event->button.button == 1) {
 177                 if (moved) {
 178                     NR::Point const event_w(event->button.x,
 179                                             event->button.y);
 180                     NR::Point const event_dt(desktop->w2d(event_w));
 181                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 182                         sp_guide_moveto(*guide, sp_guide_position_from_pt(guide, event_dt), true);
 183                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 184                                      _("Move guide"));
 185                     } else {
 186                         /* Undo movement of any attached shapes. */
 187                         sp_guide_moveto(*guide, guide->position, false);
 188                         sp_guide_remove(guide);
 189                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 190                                      _("Delete guide"));
 191                     }
 192                     moved = false;
 193                     desktop->set_coordinate_status(event_dt);
 194                     desktop->setPosition (event_dt);
 195                 }
 196                 dragging = false;
 197                 sp_canvas_item_ungrab(item, event->button.time);
 198                 ret=TRUE;
 199             }
 200         case GDK_ENTER_NOTIFY:
 201         {
 202
 203             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 204
 205             GString *position_string = SP_PX_TO_METRIC_STRING(guide->position, desktop->namedview->getDefaultMetric());
 206             char *guide_description = sp_guide_description(guide);
 207
 208             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("%s at %s"), guide_description, position_string->str);
 209
 210             g_free(guide_description);
 211             g_string_free(position_string, TRUE);
 212             break;
 213         }
 214         case GDK_LEAVE_NOTIFY:
 215             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 216             desktop->guidesMessageContext()->clear();
 217             break;
 218         default:
 219             break;
 220     }
 221
 222     return ret;
 223 }
 224
 225
 226 /*
 227   Local Variables:
 228   mode:c++
 229   c-file-style:"stroustrup"
 230   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 231   indent-tabs-mode:nil
 232   fill-column:99
 233   End:
 234 */
 235 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 236