//$Id: myarea.cc 491 2005-12-23 11:01:49Z murrayc $ -*- c++ -*- /* gtkmm example Copyright (C) 2002 gtkmm development team * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * 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 "myarea.h" #include MyArea::MyArea() {} MyArea::~MyArea() {} bool MyArea::on_draw(const Cairo::RefPtr& cr) { Gtk::Allocation allocation = get_allocation(); const int width = allocation.get_width(); const int height = allocation.get_height(); // coordinates for the center of the window int xc, yc; xc = width / 2; yc = height / 2; cr->set_line_width(10.0); // draw red lines out from the center of the window cr->set_source_rgb(0.8, 0.0, 0.0); cr->move_to(0, 0); cr->line_to(xc, yc); cr->line_to(0, height); cr->move_to(xc, yc); cr->line_to(width, yc); cr->stroke(); return true; }