+
+void start_selectregion(GdkEvent *event)
+{
+ double pt[2];
+ reset_selection();
+
+ ui.cur_item_type = ITEM_SELECTREGION;
+ ui.selection = g_new(struct Selection, 1);
+ ui.selection->type = ITEM_SELECTREGION;
+ ui.selection->items = NULL;
+ ui.selection->layer = ui.cur_layer;
+
+ get_pointer_coords(event, pt);
+ ui.selection->bbox.left = ui.selection->bbox.right = pt[0];
+ ui.selection->bbox.top = ui.selection->bbox.bottom = pt[1];
+
+ realloc_cur_path(1);
+ ui.cur_path.num_points = 1;
+ ui.cur_path.coords[0] = ui.cur_path.coords[2] = pt[0];
+ ui.cur_path.coords[1] = ui.cur_path.coords[3] = pt[1];
+
+ ui.selection->canvas_item = gnome_canvas_item_new(ui.cur_layer->group,
+ gnome_canvas_polygon_get_type(), "width-pixels", 1,
+ "outline-color-rgba", 0x000000ff,
+ "fill-color-rgba", 0x80808040,
+ NULL);
+ make_dashed(ui.selection->canvas_item);
+ update_cursor();
+}
+
+void continue_selectregion(GdkEvent *event)
+{
+ double *pt;
+
+ realloc_cur_path(ui.cur_path.num_points+1);
+ pt = ui.cur_path.coords + 2*ui.cur_path.num_points;
+ get_pointer_coords(event, pt);
+ if (hypot(pt[0]-pt[-2], pt[1]-pt[-1]) < PIXEL_MOTION_THRESHOLD/ui.zoom)
+ return; // not a meaningful motion
+ ui.cur_path.num_points++;
+ if (ui.cur_path.num_points>2)
+ gnome_canvas_item_set(ui.selection->canvas_item,
+ "points", &ui.cur_path, NULL);
+}
+
+/* check whether a point, resp. an item, is inside a lasso selection */
+
+gboolean hittest_point(ArtSVP *lassosvp, double x, double y)
+{
+ return art_svp_point_wind(lassosvp, x, y)%2;
+}
+
+gboolean hittest_item(ArtSVP *lassosvp, struct Item *item)
+{
+ int i;
+
+ if (item->type == ITEM_STROKE) {
+ for (i=0; i<item->path->num_points; i++)
+ if (!hittest_point(lassosvp, item->path->coords[2*i], item->path->coords[2*i+1]))
+ return FALSE;
+ return TRUE;
+ }
+ else
+ return (hittest_point(lassosvp, item->bbox.left, item->bbox.top) &&
+ hittest_point(lassosvp, item->bbox.right, item->bbox.top) &&
+ hittest_point(lassosvp, item->bbox.left, item->bbox.bottom) &&
+ hittest_point(lassosvp, item->bbox.right, item->bbox.bottom));
+}
+
+void finalize_selectregion(void)
+{
+ GList *itemlist;
+ struct Item *item;
+ ArtVpath *vpath;
+ ArtSVP *lassosvp;
+ int i, n;
+ double *pt;
+
+ ui.cur_item_type = ITEM_NONE;
+
+ // build SVP for the lasso path
+ n = ui.cur_path.num_points;
+ vpath = g_malloc((n+2)*sizeof(ArtVpath));
+ for (i=0; i<n; i++) {
+ vpath[i].x = ui.cur_path.coords[2*i];
+ vpath[i].y = ui.cur_path.coords[2*i+1];
+ }
+ vpath[n].x = vpath[0].x; vpath[n].y = vpath[0].y;
+ vpath[0].code = ART_MOVETO;
+ for (i=1; i<=n; i++) vpath[i].code = ART_LINETO;
+ vpath[n+1].code = ART_END;
+ lassosvp = art_svp_from_vpath(vpath);
+ g_free(vpath);
+
+ // see which items we selected
+ for (itemlist = ui.selection->layer->items; itemlist!=NULL; itemlist = itemlist->next) {
+ item = (struct Item *)itemlist->data;
+ if (hittest_item(lassosvp, item)) {
+ // update the selection bbox
+ if (ui.selection->items==NULL || ui.selection->bbox.left>item->bbox.left)
+ ui.selection->bbox.left = item->bbox.left;
+ if (ui.selection->items==NULL || ui.selection->bbox.right<item->bbox.right)
+ ui.selection->bbox.right = item->bbox.right;
+ if (ui.selection->items==NULL || ui.selection->bbox.top>item->bbox.top)
+ ui.selection->bbox.top = item->bbox.top;
+ if (ui.selection->items==NULL || ui.selection->bbox.bottom<item->bbox.bottom)
+ ui.selection->bbox.bottom = item->bbox.bottom;
+ // add the item
+ ui.selection->items = g_list_append(ui.selection->items, item);
+ }
+ }
+ art_svp_free(lassosvp);
+
+ if (ui.selection->items == NULL) {
+ // if we clicked inside a text zone or image?
+ pt = ui.cur_path.coords;
+ item = click_is_in_text_or_image(ui.selection->layer, pt[0], pt[1]);
+ if (item!=NULL) {
+ for (i=0; i<n; i++, pt+=2) {
+ if (pt[0]<item->bbox.left || pt[0]>item->bbox.right || pt[1]<item->bbox.top || pt[1]>item->bbox.bottom)
+ { item = NULL; break; }
+ }
+ }
+ if (item!=NULL) {
+ ui.selection->items = g_list_append(ui.selection->items, item);
+ g_memmove(&(ui.selection->bbox), &(item->bbox), sizeof(struct BBox));
+ }
+ }
+
+ if (ui.selection->items == NULL) reset_selection();
+ else { // make a selection rectangle instead of the lasso shape
+ gtk_object_destroy(GTK_OBJECT(ui.selection->canvas_item));
+ ui.selection->canvas_item = gnome_canvas_item_new(ui.cur_layer->group,
+ gnome_canvas_rect_get_type(), "width-pixels", 1,
+ "outline-color-rgba", 0x000000ff,
+ "fill-color-rgba", 0x80808040,
+ "x1", ui.selection->bbox.left, "x2", ui.selection->bbox.right,
+ "y1", ui.selection->bbox.top, "y2", ui.selection->bbox.bottom, NULL);
+ make_dashed(ui.selection->canvas_item);
+ ui.selection->type = ITEM_SELECTRECT;
+ }
+
+ update_cursor();
+ update_copy_paste_enabled();
+ update_font_button();
+}
+
+
+/*** moving/resizing the selection ***/
+
projects / xournal.git / commitdiff