/* * Grace - GRaphing, Advanced Computation and Exploration of data * * Home page: http://plasma-gate.weizmann.ac.il/Grace/ * * Copyright (c) 2000-2004 Grace Development Team * * Maintained by Evgeny Stambulchik * * * All Rights Reserved * * 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* * Object drawing */ #include #include #include "grace/canvas.h" #include "plotone.h" #include "core_utils.h" void draw_object(Canvas *canvas, Quark *q) { VPoint anchor; DObject *o = object_get_data(q); if (o == NULL) { return; } if (Apoint2Vpoint(q, &o->ap, &anchor) != RETURN_SUCCESS) { return; } anchor.x += o->offset.x; anchor.y += o->offset.y; setclipping(canvas, FALSE); activate_bbox(canvas, BBOX_TYPE_TEMP, TRUE); reset_bbox(canvas, BBOX_TYPE_TEMP); switch (o->type) { case DO_LINE: { DOLineData *l = (DOLineData *) o->odata; VPoint vp1; double x, y, co, si; x = l->vector.x; y = l->vector.y; co = cos(M_PI/180.0*o->angle); si = sin(M_PI/180.0*o->angle); vp1.x = anchor.x + x*co - y*si; vp1.y = anchor.y + x*si + y*co; setline(canvas, &o->line); DrawLine(canvas, &anchor, &vp1); switch (l->arrow_end) { case 0: break; case 1: draw_arrowhead(canvas, &vp1, &anchor, &l->arrow, &o->line.pen, &o->fillpen); break; case 2: draw_arrowhead(canvas, &anchor, &vp1, &l->arrow, &o->line.pen, &o->fillpen); break; case 3: draw_arrowhead(canvas, &vp1, &anchor, &l->arrow, &o->line.pen, &o->fillpen); draw_arrowhead(canvas, &anchor, &vp1, &l->arrow, &o->line.pen, &o->fillpen); break; } } break; case DO_BOX: { DOBoxData *b = (DOBoxData *) o->odata; if (o->angle == 0.0) { VPoint vp1, vp2; vp1.x = anchor.x - b->width/2; vp2.x = anchor.x + b->width/2; vp1.y = anchor.y - b->height/2; vp2.y = anchor.y + b->height/2; setpen(canvas, &o->fillpen); FillRect(canvas, &vp1, &vp2); setline(canvas, &o->line); DrawRect(canvas, &vp1, &vp2); } else { VPoint vps[4]; double x, y, co, si; x = b->width/2; y = b->height/2; co = cos(M_PI/180.0*o->angle); si = sin(M_PI/180.0*o->angle); vps[0].x = anchor.x + x*co - y*si; vps[0].y = anchor.y + x*si + y*co; vps[1].x = anchor.x - x*co - y*si; vps[1].y = anchor.y - x*si + y*co; vps[2].x = anchor.x - x*co + y*si; vps[2].y = anchor.y - x*si - y*co; vps[3].x = anchor.x + x*co + y*si; vps[3].y = anchor.y + x*si - y*co; setpen(canvas, &o->fillpen); DrawPolygon(canvas, vps, 4); setline(canvas, &o->line); DrawPolyline(canvas, vps, 4, POLYLINE_CLOSED); } } break; case DO_ARC: { VPoint vp1, vp2; DOArcData *e = (DOArcData *) o->odata; vp1.x = anchor.x - e->width/2; vp2.x = anchor.x + e->width/2; vp1.y = anchor.y - e->height/2; vp2.y = anchor.y + e->height/2; setpen(canvas, &o->fillpen); /* FIXME: implement true ellipse rotation! */ DrawFilledArc(canvas, &vp1, &vp2, e->angle1 + o->angle, e->angle2, e->fillmode); setline(canvas, &o->line); DrawArc(canvas, &vp1, &vp2, e->angle1 + o->angle, e->angle2); } break; case DO_NONE: break; } get_bbox(canvas, BBOX_TYPE_TEMP, &o->bb); } void draw_atext(Canvas *canvas, Quark *q) { VPoint anchor; int savebg; AText *at = atext_get_data(q); if (!at || is_empty_string(at->s)) { return; } if (Apoint2Vpoint(q, &at->ap, &anchor) != RETURN_SUCCESS) { return; } anchor.x += at->offset.x; anchor.y += at->offset.y; setclipping(canvas, FALSE); activate_bbox(canvas, BBOX_TYPE_TEMP, TRUE); reset_bbox(canvas, BBOX_TYPE_TEMP); if (at->line.pen.pattern || at->fillpen.pattern) { view bbox; VPoint vp1, vp2; setcharsize(canvas, at->text_props.charsize); setfont(canvas, at->text_props.font); get_string_bbox(canvas, &anchor, at->text_props.angle, at->text_props.just, at->s, &bbox); view_extend(&bbox, at->frame_offset); at->bb = bbox; switch (at->frame_decor) { case FRAME_DECOR_LINE: vp1.x = bbox.xv1; vp1.y = bbox.yv1; vp2.x = bbox.xv2; vp2.y = bbox.yv1; setline(canvas, &at->line); DrawLine(canvas, &vp1, &vp2); break; case FRAME_DECOR_RECT: vp1.x = bbox.xv1; vp1.y = bbox.yv1; vp2.x = bbox.xv2; vp2.y = bbox.yv2; setpen(canvas, &at->fillpen); FillRect(canvas, &vp1, &vp2); setline(canvas, &at->line); DrawRect(canvas, &vp1, &vp2); break; case FRAME_DECOR_OVAL: vp1.x = bbox.xv1 - (M_SQRT2 - 1)/2*(bbox.xv2 - bbox.xv1); vp1.y = bbox.yv1 - (M_SQRT2 - 1)/2*(bbox.yv2 - bbox.yv1); vp2.x = bbox.xv2 + (M_SQRT2 - 1)/2*(bbox.xv2 - bbox.xv1); vp2.y = bbox.yv2 + (M_SQRT2 - 1)/2*(bbox.yv2 - bbox.yv1); setpen(canvas, &at->fillpen); DrawFilledEllipse(canvas, &vp1, &vp2); setline(canvas, &at->line); DrawEllipse(canvas, &vp1, &vp2); break; } if (at->arrow_flag && at->line.style) { vp2.x = anchor.x - at->offset.x; vp2.y = anchor.y - at->offset.y; switch (at->frame_decor) { case FRAME_DECOR_LINE: if (vp2.x < bbox.xv1) { vp1.x = bbox.xv1; } else if (vp2.x > bbox.xv2) { vp1.x = bbox.xv2; } else { vp1.x = vp2.x; } vp1.y = bbox.yv1; break; case FRAME_DECOR_OVAL: if (vp2.x < bbox.xv1) { vp1.x = bbox.xv1; } else if (vp2.x > bbox.xv2) { vp1.x = bbox.xv2; } else { vp1.x = (bbox.xv1 + bbox.xv2)/2; } if (vp2.y < bbox.yv1) { vp1.y = bbox.yv1; } else if (vp2.y > bbox.yv2) { vp1.y = bbox.yv2; } else { vp1.y = (bbox.yv1 + bbox.yv2)/2; } break; default: if (vp2.x < bbox.xv1) { vp1.x = bbox.xv1; } else if (vp2.x > bbox.xv2) { vp1.x = bbox.xv2; } else { vp1.x = vp2.x; } if (vp2.y < bbox.yv1) { vp1.y = bbox.yv1; } else if (vp2.y > bbox.yv2) { vp1.y = bbox.yv2; } else { vp1.y = vp2.y; } } setline(canvas, &at->line); DrawLine(canvas, &vp1, &vp2); draw_arrowhead(canvas, &vp1, &vp2, &at->arrow, &at->line.pen, &at->line.pen); } } savebg = getbgcolor(canvas); /* If frame is filled with a solid color, alter bgcolor to make AA look good */ if (at->fillpen.pattern == 1) { setbgcolor(canvas, at->fillpen.color); } drawtext(canvas, &anchor, &at->text_props, at->s); setbgcolor(canvas, savebg); }