jcckit.GraphicsPlotCanvas Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of plantuml Show documentation
Show all versions of plantuml Show documentation
PlantUML is a component that allows to quickly write :
* sequence diagram,
* use case diagram,
* class diagram,
* activity diagram,
* component diagram,
* state diagram
* object diagram
/*
* Copyright 2003-2004, Franz-Josef Elmer, All rights reserved
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* 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 Lesser General Public License for more details
* (http://www.gnu.org/copyleft/lesser.html).
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package jcckit;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import jcckit.graphic.GraphicalElement;
import jcckit.graphic.Renderer;
import jcckit.plot.Plot;
import jcckit.plot.PlotCanvas;
import jcckit.renderer.Graphics2DRenderer;
import jcckit.renderer.Transformation;
import jcckit.util.ConfigParameters;
import jcckit.util.Factory;
/**
* Class which handles plotting into a Graphics context based on the
* {@link jcckit.renderer.GraphicsRenderer}. This class is not a subclass of
* java.awt.Component. The actual AWT component presenting the plot
* is an innerclass. Its instance wrapped by GraphicsPlotCanvas can
* be obtained with {@link #getGraphicsCanvas}.
*
* The plot is painted by using double-buffering and pre-rendered view of the
* coordinate system. That is, the coordinate system is drawn into an off-screen
* image. It will be redrawn only if the size of the embedding AWT component is
* changed.
*
* @author Franz-Josef Elmer
*/
public class GraphicsPlotCanvas extends PlotCanvas {
/** Key of a configuration parameter. */
public static final String BACKGROUND_KEY = "background";
public static final String FOREGROUND_KEY = "foreground";
public static final String DOUBLE_BUFFERING_KEY = "doubleBuffering";
/**
* Class which does the actual painting. Needs the Component into
* which the plot is painted for some resources like size, background color,
* etc.
*
* @author Franz-Josef Elmer
*/
private final BufferedImage img3;
private final Graphics2D g3;
private Transformation _transformation;
private String _renderer = "jcckit.renderer.GraphicsRenderer";
private GraphicalElement _marker;
/**
* Creates an instance from the specified configuration parameters.
*
* Key & Default Value
* Type
* Mandatory
* Description
*
*
* background = default background color of the wrapped
* AWT component
* Color
* no
* Background color of the wrapped AWT component.
*
*
* foreground = default foreground color of the wrapped
* AWT component
* Color
* no
* Foreground color of the wrapped AWT component.
*
*
* doubleBuffering = true
* boolean no
* If true the plot will be painted by using
* double-buffering and pre-rendered view of the coordinate system.
*
*
* In addition the configuration parameters of the
*
* constructor of the superclass {@link jcckit.plot.PlotCanvas} apply.
*/
public GraphicsPlotCanvas(ConfigParameters config, BufferedImage img3) {
super(config);
this.img3 = img3;
setRenderer("jcckit.renderer.Graphics2DRenderer");
g3 = img3.createGraphics();
g3.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
// _doubleBuffering = config.getBoolean(DOUBLE_BUFFERING_KEY, true);
background = config.getColor(BACKGROUND_KEY, Color.WHITE);
foreground = config.getColor(FOREGROUND_KEY, Color.BLACK);
}
private final Color background;
private final Color foreground;
/**
* Paints the plot. If {@link GraphicsPlotCanvas#_doubleBuffering} is set
* double-buffering and pre-rendered view of the coordinate system is used.
*/
public void paint() {
Dimension size = new Dimension(img3.getWidth(), img3.getHeight());
g3.setColor(background);
g3.fillRect(0, 0, size.width + 1, size.height + 1);
init(size);
_transformation.apply(g3);
Plot plot = getPlot();
drawCoordinateSystem(size, plot);
drawPlot(plot);
if (_marker != null) {
_marker.renderWith(createRenderer());
}
}
private void drawPlot(Plot plot) {
prepare();
Renderer renderer = createRenderer();
GraphicalElement[] curves = plot.getCurves();
for (int i = 0; i < curves.length; i++) {
curves[i].renderWith(renderer);
}
GraphicalElement annotation = plot.getAnnotation();
if (annotation != null) {
annotation.renderWith(renderer);
}
if (plot.isLegendVisible()) {
plot.getLegend().renderWith(renderer);
}
}
private void init(Dimension size) {
calculateTransformation(size);
}
private void drawCoordinateSystem(Dimension size, Plot plot) {
g3.setColor(foreground);
plot.getCoordinateSystem().renderWith(createRenderer());
}
/**
* Prepare graphics context before drawing the pre-rendered view of the
* coordinate system. Does nothing but will be used in subclasses.
*/
protected void prepare() {
}
/**
* Calculate the transformation form device-independent coordinates into
* device-dependent coordinates according to the specified canvas size.
*/
protected void calculateTransformation(Dimension size) {
_transformation = new Transformation(size.width, size.height, getPaper(), getHorizontalAnchor(),
getVerticalAnchor());
}
/**
* Creates an appropriated {@link Renderer} for the specified
* Graphics context.
*/
protected Renderer createRenderer() {
return ((Graphics2DRenderer) Factory.create(_renderer)).init(g3);
// return ((GraphicsRenderer) Factory.create(_renderer)).init(g, null,
// _transformation);
}
/**
* Sets the renderer used to render the plot. The default value is
* {@link GraphicsRenderer}.
*
* @param className
* Fully qualified name of the renderer class.
*/
public void setRenderer(String className) {
_renderer = className;
}
// /**
// * Maps the cursor position onto a point in device-independent
// coordinates.
// *
// * @param x
// * X-coordinate of the cursor.
// * @param y
// * Y-coordinate of the cursor.
// */
// public GraphPoint mapCursorPosition(int x, int y) {
// return _transformation.transformBack(x, y);
// }
/**
* Defines a graphical marker which will be drawn on top of the plot. To
* remove the marker call this method with argument null.
*
* @param marker
* Marker element. Can be null.
*/
public void setMarker(GraphicalElement marker) {
_marker = marker;
}
}