e169895ef5
2000-05-30 Christopher James Lahey <clahey@helixcode.com> * e-canvas-utils.c, e-canvas-utils.h: Added e_canvas_item_show_area which makes sure that a particular area of a given item is in the scroll area. svn path=/trunk/; revision=3289
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
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/*
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* e-canvas-utils.c
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* Copyright (C) 2000 Helix Code, Inc.
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* Author: Chris Lahey <clahey@helixcode.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "e-canvas-utils.h"
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void
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e_canvas_item_move_absolute (GnomeCanvasItem *item, double dx, double dy)
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{
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double translate[6];
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g_return_if_fail (item != NULL);
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g_return_if_fail (GNOME_IS_CANVAS_ITEM (item));
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art_affine_translate (translate, dx, dy);
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gnome_canvas_item_affine_absolute (item, translate);
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}
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void
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e_canvas_item_show_area (GnomeCanvasItem *item, double x1, double y1, double x2, double y2)
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{
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GtkAdjustment *h, *v;
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double dx = 0, dy = 0;
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g_return_if_fail (item != NULL);
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g_return_if_fail (GNOME_IS_CANVAS_ITEM (item));
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gnome_canvas_item_i2w(item, &x1, &y1);
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gnome_canvas_item_i2w(item, &x2, &y2);
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h = gtk_layout_get_hadjustment(GTK_LAYOUT(item->canvas));
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v = gtk_layout_get_vadjustment(GTK_LAYOUT(item->canvas));
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if (x2 > h->value + h->page_size)
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dx = (x2 - (h->value + h->page_size));
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if (y2 > v->value + v->page_size)
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dy = (y2 - (v->value + v->page_size));
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if (x1 < h->value + dx)
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dx = (x1 - h->value);
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if (y1 < v->value + dy)
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dy = (y1 - v->value);
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if (dx)
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gtk_adjustment_set_value(h, h->value + dx);
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if (dy)
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gtk_adjustment_set_value(v, v->value + dy);
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}
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