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/*
* java-gnome, a UI library for writing GTK and GNOME programs from Java!
*
* Copyright © 2008-2010 Operational Dynamics Consulting, Pty Ltd
*
* The code in this file, and the program it is a part of, is made available
* to you by its authors as open source software: you can redistribute it
* and/or modify it under the terms of the GNU General Public License version
* 2 ("GPL") 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 GPL for more details.
*
* You should have received a copy of the GPL along with this program. If not,
* see http://www.gnu.org/licenses/. The authors of this program may be
* contacted through http://java-gnome.sourceforge.net/.
*/
package org.freedesktop.cairo;
import org.gnome.pango.FontDescription;
import org.gnome.pango.Layout;
import org.gnome.pango.Rectangle;
/**
* Draw an x and y axis, emphasizing that +y is downwards.
*
* @author Andrew Cowie
*/
abstract class SnapshotCairoAxis extends SnapshotCairo
{
SnapshotCairoAxis(Class<?> cls, String suffix) {
super(cls, suffix);
}
protected void drawAxis(Context cr) {
final Layout text;
final FontDescription desc;
Rectangle rect;
text = new Layout(cr);
cr.setSource(0, 0, 0);
cr.setLineWidth(2.0);
// horizontal
cr.moveTo(5, 50);
cr.lineTo(95, 50);
cr.stroke();
cr.moveTo(95, 50);
cr.lineRelative(-5, -3);
cr.lineRelative(0, 6);
cr.fill();
desc = new FontDescription("Liberation Serif, 12");
text.setFontDescription(desc);
text.setMarkup("+<i>x</i>");
rect = text.getExtentsLogical();
cr.moveTo(95 - rect.getWidth(), 50 - rect.getHeight() - 2);
cr.showLayout(text);
// vertical
cr.moveTo(50, 5);
cr.lineTo(50, 95);
cr.stroke();
cr.moveTo(50, 95);
cr.lineRelative(-3, -5);
cr.lineRelative(+6, 0);
cr.fill();
text.setMarkup("+<i>y</i>");
rect = text.getExtentsLogical();
cr.moveTo(50 - rect.getWidth() - 5, 95 - rect.getHeight());
cr.showLayout(text);
}
}
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