/* * Copyright (C) 1995 Spencer Kimball and Peter Mattis * * This is a plug-in for the GIMP. * * Generates images containing vector type drawings. * * Copyright (C) 1997 Andy Thomas alt@picnic.demon.co.uk * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * */ #include "config.h" #include #include #include #include #include #include #include #include "gfig.h" #include "gfig-dobject.h" #include "libgimp/stdplugins-intl.h" static void d_draw_ellipse (GfigObject *obj); static void d_paint_ellipse (GfigObject *obj); static GfigObject *d_copy_ellipse (GfigObject *obj); static void d_update_ellipse (GdkPoint *pnt); static void d_draw_ellipse (GfigObject * obj) { DobjPoints *center_pnt; DobjPoints *edge_pnt; gint bound_wx; gint bound_wy; gint top_x; gint top_y; center_pnt = obj->points; if (!center_pnt) return; /* End-of-line */ edge_pnt = center_pnt->next; if (!edge_pnt) { g_warning ("Internal error - ellipse no edge pnt"); } draw_sqr (¢er_pnt->pnt, obj == gfig_context->selected_obj); draw_sqr (&edge_pnt->pnt, obj == gfig_context->selected_obj); bound_wx = abs (center_pnt->pnt.x - edge_pnt->pnt.x); bound_wy = abs (center_pnt->pnt.y - edge_pnt->pnt.y); if (edge_pnt->pnt.x > center_pnt->pnt.x) top_x = 2 * center_pnt->pnt.x - edge_pnt->pnt.x; else top_x = edge_pnt->pnt.x; if (edge_pnt->pnt.y > center_pnt->pnt.y) top_y = 2 * center_pnt->pnt.y - edge_pnt->pnt.y; else top_y = edge_pnt->pnt.y; gfig_draw_arc (center_pnt->pnt.x, center_pnt->pnt.y, bound_wx, bound_wy, 0, 360); } static void d_paint_ellipse (GfigObject *obj) { DobjPoints *center_pnt; DobjPoints *edge_pnt; gint bound_wx; gint bound_wy; gint top_x; gint top_y; gdouble dpnts[4]; /* Drawing ellipse is hard . * 1) select ellipse * 2) stroke it */ g_assert (obj != NULL); center_pnt = obj->points; if (!center_pnt) return; /* End-of-line */ edge_pnt = center_pnt->next; if (!edge_pnt) { g_error ("Internal error - ellipse no edge pnt"); } bound_wx = abs (center_pnt->pnt.x - edge_pnt->pnt.x)*2; bound_wy = abs (center_pnt->pnt.y - edge_pnt->pnt.y)*2; if (edge_pnt->pnt.x > center_pnt->pnt.x) top_x = 2*center_pnt->pnt.x - edge_pnt->pnt.x; else top_x = edge_pnt->pnt.x; if (edge_pnt->pnt.y > center_pnt->pnt.y) top_y = 2*center_pnt->pnt.y - edge_pnt->pnt.y; else top_y = edge_pnt->pnt.y; dpnts[0] = (gdouble)top_x; dpnts[1] = (gdouble)top_y; dpnts[2] = (gdouble)bound_wx; dpnts[3] = (gdouble)bound_wy; /* Scale before drawing */ if (selvals.scaletoimage) scale_to_original_xy (&dpnts[0], 2); else scale_to_xy (&dpnts[0], 2); gimp_ellipse_select (gfig_context->image_id, dpnts[0], dpnts[1], dpnts[2], dpnts[3], selopt.type, selopt.antia, selopt.feather, selopt.feather_radius); paint_layer_fill (); if (obj->style.paint_type == PAINT_BRUSH_TYPE) gimp_edit_stroke (gfig_context->drawable_id); } static GfigObject * d_copy_ellipse (GfigObject * obj) { GfigObject *nc; g_assert (obj->type == ELLIPSE); nc = d_new_object (ELLIPSE, obj->points->pnt.x, obj->points->pnt.y); nc->points->next = d_copy_dobjpoints (obj->points->next); return nc; } void d_ellipse_object_class_init (void) { GfigObjectClass *class = &dobj_class[ELLIPSE]; class->type = ELLIPSE; class->name = "ELLIPSE"; class->drawfunc = d_draw_ellipse; class->paintfunc = d_paint_ellipse; class->copyfunc = d_copy_ellipse; class->update = d_update_ellipse; } static void d_update_ellipse (GdkPoint *pnt) { DobjPoints *center_pnt, *edge_pnt; gint bound_wx; gint bound_wy; gint top_x; gint top_y; /* Undraw last one then draw new one */ center_pnt = obj_creating->points; if (!center_pnt) return; /* No points */ if ((edge_pnt = center_pnt->next)) { /* Undraw current */ bound_wx = abs (center_pnt->pnt.x - edge_pnt->pnt.x) * 2; bound_wy = abs (center_pnt->pnt.y - edge_pnt->pnt.y) * 2; if (edge_pnt->pnt.x > center_pnt->pnt.x) top_x = 2 * center_pnt->pnt.x - edge_pnt->pnt.x; else top_x = edge_pnt->pnt.x; if (edge_pnt->pnt.y > center_pnt->pnt.y) top_y = 2 * center_pnt->pnt.y - edge_pnt->pnt.y; else top_y = edge_pnt->pnt.y; draw_circle (&edge_pnt->pnt, TRUE); gdk_draw_arc (gfig_context->preview->window, gfig_gc, 0, top_x, top_y, bound_wx, bound_wy, 0, 360 * 64); edge_pnt->pnt = *pnt; } else { edge_pnt = new_dobjpoint (pnt->x, pnt->y); center_pnt->next = edge_pnt; } draw_circle (&edge_pnt->pnt, TRUE); bound_wx = abs (center_pnt->pnt.x - edge_pnt->pnt.x) * 2; bound_wy = abs (center_pnt->pnt.y - edge_pnt->pnt.y) * 2; if (edge_pnt->pnt.x > center_pnt->pnt.x) top_x = 2 * center_pnt->pnt.x - edge_pnt->pnt.x; else top_x = edge_pnt->pnt.x; if (edge_pnt->pnt.y > center_pnt->pnt.y) top_y = 2 * center_pnt->pnt.y - edge_pnt->pnt.y; else top_y = edge_pnt->pnt.y; gdk_draw_arc (gfig_context->preview->window, gfig_gc, 0, top_x, top_y, bound_wx, bound_wy, 0, 360 * 64); } void d_ellipse_start (GdkPoint *pnt, gboolean shift_down) { obj_creating = d_new_object (ELLIPSE, pnt->x, pnt->y); } void d_ellipse_end (GdkPoint *pnt, gboolean shift_down) { /* Under contrl point */ if (!obj_creating->points->next) { /* No circle created */ free_one_obj (obj_creating); } else { draw_circle (pnt, TRUE); add_to_all_obj (gfig_context->current_obj, obj_creating); } obj_creating = NULL; }