/*******************************************************************************
* This file is part of logisim-evolution.
*
* logisim-evolution 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 3 of the License, or
* (at your option) any later version.
*
* logisim-evolution 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 logisim-evolution. If not, see <http://www.gnu.org/licenses/>.
*
* Original code by Carl Burch (http://www.cburch.com), 2011.
* Subsequent modifications by :
* + Haute École Spécialisée Bernoise
* http://www.bfh.ch
* + Haute École du paysage, d'ingénierie et d'architecture de Genève
* http://hepia.hesge.ch/
* + Haute École d'Ingénierie et de Gestion du Canton de Vaud
* http://www.heig-vd.ch/
* The project is currently maintained by :
* + REDS Institute - HEIG-VD
* Yverdon-les-Bains, Switzerland
* http://reds.heig-vd.ch
*******************************************************************************/
package com.cburch.logisim.util;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
public class GraphicsUtil {
static public void drawArrow(Graphics g, int x0, int y0, int x1, int y1,
int headLength, int headAngle) {
double offs = headAngle * Math.PI / 180.0;
double angle = Math.atan2(y0 - y1, x0 - x1);
int[] xs = { x1 + (int) (headLength * Math.cos(angle + offs)), x1,
x1 + (int) (headLength * Math.cos(angle - offs)) };
int[] ys = { y1 + (int) (headLength * Math.sin(angle + offs)), y1,
y1 + (int) (headLength * Math.sin(angle - offs)) };
g.drawLine(x0, y0, x1, y1);
g.drawPolyline(xs, ys, 3);
}
static public void drawCenteredArc(Graphics g, int x, int y, int r,
int start, int dist) {
g.drawArc(x - r, y - r, 2 * r, 2 * r, start, dist);
}
static public void drawCenteredText(Graphics g, String text, int x, int y) {
drawText(g, text, x, y, H_CENTER, V_CENTER);
}
static public void drawCenteredText(Graphics g, Font font, String text, int x, int y, Color fg, Color bg) {
drawText(g, text, x, y, H_CENTER, V_CENTER);
}
static public void drawCenteredColoredText(Graphics g, String text, Color fg, Color bg, int x, int y) {
drawText(g, text, x, y, H_CENTER, V_CENTER, fg, bg);
}
static public void drawText(Graphics g, Font font, String text, int x,
int y, int halign, int valign, Color fg, Color bg) {
Font oldfont = g.getFont();
if (font != null)
g.setFont(font);
drawText(g, text, x, y, halign, valign, fg, bg);
if (font != null)
g.setFont(oldfont);
}
static public void drawText(Graphics g, Font font, String text, int x,
int y, int halign, int valign) {
Font oldfont = g.getFont();
if (font != null)
g.setFont(font);
drawText(g, text, x, y, halign, valign);
if (font != null)
g.setFont(oldfont);
}
static public void drawText(Graphics g, String text, int x, int y,
int halign, int valign) {
if (text.length() == 0)
return;
Rectangle bd = getTextBounds(g, text, x, y, halign, valign);
g.drawString(text, bd.x, bd.y + g.getFontMetrics().getAscent());
}
static public void drawText(Graphics g, String text, int x, int y,
int halign, int valign, Color fg, Color bg) {
if (text.length() == 0)
return;
Rectangle bd = getTextBounds(g, text, x, y, halign, valign);
if(g instanceof Graphics2D) {
((Graphics2D) g).setPaint(bg);
g.fillRect(bd.x, bd.y, bd.width, bd.height);
((Graphics2D) g).setPaint(fg);
((Graphics2D) g).drawString(text, bd.x, bd.y + g.getFontMetrics().getAscent());
} else {
g.drawString(text, bd.x, bd.y + g.getFontMetrics().getAscent());
}
}
static public Rectangle getTextBounds(Graphics g, Font font, String text,
int x, int y, int halign, int valign) {
if (g == null)
return new Rectangle(x, y, 0, 0);
Font oldfont = g.getFont();
if (font != null)
g.setFont(font);
Rectangle ret = getTextBounds(g, text, x, y, halign, valign);
if (font != null)
g.setFont(oldfont);
return ret;
}
static public Rectangle getTextBounds(Graphics g, String text, int x,
int y, int halign, int valign) {
if (g == null)
return new Rectangle(x, y, 0, 0);
FontMetrics mets = g.getFontMetrics();
int width = mets.stringWidth(text);
int ascent = mets.getAscent();
int descent = mets.getDescent();
int height = ascent + descent;
Rectangle ret = new Rectangle(x, y, width, height);
switch (halign) {
case H_CENTER:
ret.translate(-(width / 2), 0);
break;
case H_RIGHT:
ret.translate(-width, 0);
break;
default:
;
}
switch (valign) {
case V_TOP:
break;
case V_CENTER:
ret.translate(0, -(ascent / 2));
break;
case V_CENTER_OVERALL:
ret.translate(0, -(height / 2));
break;
case V_BASELINE:
ret.translate(0, -ascent);
break;
case V_BOTTOM:
ret.translate(0, -height);
break;
default:
;
}
return ret;
}
static public void switchToWidth(Graphics g, int width) {
if (g instanceof Graphics2D) {
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(new BasicStroke((float) width));
}
}
public static final int H_LEFT = -1;
public static final int H_CENTER = 0;
public static final int H_RIGHT = 1;
public static final int V_TOP = -1;
public static final int V_CENTER = 0;
public static final int V_BASELINE = 1;
public static final int V_BOTTOM = 2;
public static final int V_CENTER_OVERALL = 3;
}