/*
* This file is part of NodeBox.
*
* Copyright (C) 2008 Frederik De Bleser (frederik@pandora.be)
*
* NodeBox 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.
*
* NodeBox 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 NodeBox. If not, see <http://www.gnu.org/licenses/>.
*/
package nodebox.graphics;
import java.awt.image.BufferedImage;
public class CanvasContext extends AbstractGraphicsContext {
public static final double DEFAULT_WIDTH = 1000;
public static final double DEFAULT_HEIGHT = 1000;
public enum ImageMode {
CORNERS, CORNER, RADIUS, CENTER
}
protected ImageMode imageMode = ImageMode.CORNER;
private Canvas canvas;
//// Initialization ////
public CanvasContext() {
canvas = new Canvas(DEFAULT_WIDTH, DEFAULT_HEIGHT);
resetContext(true);
}
public CanvasContext(Canvas canvas) {
this.canvas = canvas;
resetContext(false);
}
@Override
public void resetContext() {
resetContext(true);
}
public void resetContext(boolean resetBackground) {
super.resetContext();
if (resetBackground)
canvas.setBackground(new Color(1, 1, 1));
}
public ImageMode imagemode() {
return imageMode;
}
public ImageMode imagemode(ImageMode m) {
return imageMode = m;
}
//// Setup methods ////
public void size(double width, double height) {
canvas.setWidth(width);
canvas.setHeight(height);
}
public double getWidth() {
return canvas.getWidth();
}
public double getHeight() {
return canvas.getHeight();
}
public double getWIDTH() {
return canvas.getWidth();
}
public double getHEIGHT() {
return canvas.getHeight();
}
/**
* Get the current background color.
*
* @return the current background color.
*/
public Color background() {
return canvas.getBackground();
}
/**
* Set the current background color to given grayscale value.
*
* @param x the gray component.
* @return the current background color.
*/
public Color background(double x) {
double nx = normalize(x);
return canvas.setBackground(new Color(nx, nx, nx));
}
/**
* Set the current background color to given grayscale and alpha value.
*
* @param x the grayscale value.
* @param y the alpha value.
* @return the current background color.
*/
public Color background(double x, double y) {
double nx = normalize(x);
return canvas.setBackground(new Color(nx, nx, nx, normalize(y)));
}
/**
* Set the current background color to the given R/G/B value.
*
* @param x the red component.
* @param y the green component.
* @param z the blue component.
* @return the current background color.
*/
public Color background(double x, double y, double z) {
return canvas.setBackground(new Color(normalize(x), normalize(y), normalize(z), colormode()));
}
/**
* Set the current background color to the given R/G/B/A value.
*
* @param x the red component.
* @param y the green component.
* @param z the blue component.
* @param a the alpha component.
* @return the current background color.
*/
public Color background(double x, double y, double z, double a) {
return canvas.setBackground(new Color(normalize(x), normalize(y), normalize(z), normalize(a), colormode()));
}
/**
* Set the current background color to the given color.
* <p/>
* The color object is cloned; you can change the original afterwards.
* If the color object is null, the current background color is turned off (same as nobackground).
*
* @param c the color object.
* @return the current background color.
*/
public Color background(Color c) {
return canvas.setBackground(c == null ? null : c.clone());
}
public void nobackground() {
canvas.setBackground(null);
}
//// Attribute access ////
public Canvas getCanvas() {
return canvas;
}
//// Image methods ////
@Override
public Image image(String path, double x, double y) {
return image(path, x, y, 0, 0, 1, true);
}
@Override
public Image image(String path, double x, double y, double width) {
return image(path, x, y, width, 0, 1, true);
}
@Override
public Image image(String path, double x, double y, double width, double height) {
return image(path, x, y, width, height, 1, true);
}
@Override
public Image image(String path, double x, double y, double width, double height, double alpha) {
return image(path, x, y, width, height, alpha, true);
}
@Override
public Image image(String path, double x, double y, double width, double height, boolean draw) {
return image(path, x, y, width, height, 1.0, draw);
}
@Override
public Image image(String path, double x, double y, double width, double height, double alpha, boolean draw) {
return loadImage(new Image(path), x, y, width, height, alpha, draw);
}
@Override
public Image image(Image img, double x, double y, double width, double height, double alpha, boolean draw) {
return loadImage(img.clone(), x, y, width, height, alpha, draw);
}
@Override
public Image image(BufferedImage img, double x, double y, double width, double height, double alpha, boolean draw) {
return loadImage(new Image(img), x, y, width, height, alpha, draw);
}
private Image loadImage(Image img, double x, double y, double width, double height, double alpha, boolean draw) {
if (width != 0) img.setWidth(width);
if (height != 0) img.setHeight(height);
switch (imageMode) {
case CORNER:
double w = img.getWidth();
double h = img.getHeight();
img.setX(x + w / 2);
img.setY(y + h / 2);
break;
case CENTER:
img.setX(x);
img.setY(y);
}
// todo: differentiate between newly constructed objects and copies.
img.setTransformDelegate(new ContextTransformDelegate(this));
inheritFromContext(img);
if (alpha != 1.0)
img.setAlpha(alpha);
if (draw)
canvas.add(img);
return img;
}
@Override
public Size imagesize(String path) {
Image img = new Image(path);
return img.getSize();
}
@Override
public Size imagesize(Image img) {
return img.getSize();
}
@Override
public Size imagesize(BufferedImage img) {
return new Size(img.getWidth(), img.getHeight());
}
/// Drawing methods ////
/**
* The draw method doesn't actually draw anything, but rather appends grobs to the canvas.
* When the canvas gets drawn, this grob will be drawn also.
*
* @param grob the grob to append to the canvas
*/
public void draw(Grob grob) {
canvas.add(grob);
}
@Override
protected void addPath(Path p) {
canvas.add(p);
}
@Override
protected void addText(Text t) {
canvas.add(t);
}
protected void addImage(Image i) {
canvas.add(i);
}
//// Context inheritance ////
protected void inheritFromContext(Image i) {
TransformDelegate d = i.getTransformDelegate();
d.transform(i, transform, true);
}
}