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package org.singinst.uf.view;
import java.awt.BasicStroke;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.font.FontRenderContext;
import java.awt.font.TextAttribute;
import java.awt.font.TextLayout;
import java.awt.geom.Ellipse2D;
import java.awt.geom.GeneralPath;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.text.AttributedCharacterIterator;
import java.text.AttributedString;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.Stack;
import javax.swing.JPanel;
import org.singinst.uf.math.SimplePoint;
import org.singinst.uf.presenter.CanvasString;
import org.singinst.uf.presenter.GraphCanvas;
import org.singinst.uf.presenter.MouseClickListener;
import org.singinst.uf.presenter.MouseDragListener;
import org.singinst.uf.presenter.PlaneBounds;
import org.singinst.uf.presenter.SimpleLine;
import org.singinst.uf.presenter.SimpleStyle;
public class SwingGraphCanvas implements GraphCanvas, MouseListener, MouseMotionListener {
private Graphics2D g2;
private Stack<SwingStyle> styleStack;
private Dimension size;
private PlaneBounds bounds;
private final Set<MouseDragListener> dragListeners = new HashSet<MouseDragListener>();
private final Set<MouseClickListener> clickListeners = new HashSet<MouseClickListener>();
private JPanel panel;
private MouseDragListener selectedDragListener;
public SwingGraphCanvas() {
// MainWindow.pane.addChangeListener(new ChangeListener() {
//
// public void stateChanged(ChangeEvent e) {
//// dragListeners.clear();
//// clickListeners.clear();
// }
//
// });
}
public void setPanel(JPanel panel) {
this.panel = panel;
}
public void setGraphics(Graphics2D g2) {
this.g2 = g2;
this.styleStack = new Stack<SwingStyle>();
styleStack.push(new SwingStyle(g2));
}
public void setSize(Dimension size) {
this.size = size;
this.bounds = new PlaneBounds(0, size.width, size.height, 0);
}
public void clear() {
g2.clearRect(0,0,size.width,size.height);
}
public void drawLine(SimpleLine line) {
g2.draw(new Line2D.Double(point(line.p1), point(line.p2)));
}
private Point2D point(SimplePoint p) {
return new Point2D.Double(p.x, p.y);
}
public void drawDecorationPoint(SimplePoint point) {
double dotDiameter = size.width / 200;
double dotRadius = dotDiameter / 2;
g2.draw(new Ellipse2D.Double(point.x - dotRadius, point.y - dotRadius, dotDiameter, dotDiameter));
}
public PlaneBounds getPlaneBounds() {
return bounds;
}
public void drawCurve(List<SimplePoint> points) {
if (points.isEmpty()) {
return;
}
GeneralPath curve = new GeneralPath();
Iterator<SimplePoint> iterator = points.iterator();
curveMoveTo(curve, iterator.next());
while (iterator.hasNext()) {
curveLineTo(curve, iterator.next());
}
g2.draw(curve);
}
private void curveLineTo(GeneralPath curve, SimplePoint point) {
curve.lineTo((float) point.x, (float) point.y);
}
private void curveMoveTo(GeneralPath curve, SimplePoint point) {
curve.moveTo((float) point.x, (float) point.y);
}
public void addMouseClickListener(MouseClickListener listener) {
clickListeners.add(listener);
if (dragListeners.size() + dragListeners.size() > 1) {
throw new UnsupportedOperationException();
}
panel.addMouseListener(this);
}
public void addMouseDragListener(MouseDragListener listener) {
dragListeners.add(listener);
if (dragListeners.size() + clickListeners.size() > 1) {
throw new UnsupportedOperationException();
}
panel.addMouseListener(this);
panel.addMouseMotionListener(this);
}
public void mouseClicked(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
selectedDragListener = null;
}
public void mousePressed(MouseEvent e) {
for (MouseClickListener listener : clickListeners) {
listener.mouseClick(simplePoint(e.getPoint()));
}
if (dragListeners.size() > 0) {
MouseDragListener dragListener = dragListeners.iterator().next();
int priority = dragListener.mouseDown(simplePoint(e.getPoint()));
if (priority > 0) {
selectedDragListener = dragListener;
}
}
}
public void mouseReleased(MouseEvent e) {
if (selectedDragListener != null) {
selectedDragListener.dragTo(simplePoint(e.getPoint()));
selectedDragListener = null;
}
}
public void mouseDragged(MouseEvent e) {
if (selectedDragListener != null) {
selectedDragListener.dragTo(simplePoint(e.getPoint()));
}
}
private SimplePoint simplePoint(Point point) {
return new SimplePoint(point.getX(), point.getY());
}
public void mouseMoved(MouseEvent e) {
}
public void invalidate() {
if (panel != null) {
panel.repaint();
}
}
public void popStyle() {
styleStack.pop();
setStyle(styleStack.peek());
}
private void setStyle(SwingStyle style) {
g2.setColor(style.getColor());
if (style.isDottedLine()) {
g2.setStroke(new BasicStroke(1, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER, 10, new float[] {2}, 0));
} else {
g2.setStroke(new BasicStroke());
}
}
public void pushStyle(SimpleStyle style) {
SwingStyle swingStyle;
if (style == null) {
swingStyle = styleStack.peek();
} else {
swingStyle = new SwingStyle(style);
}
styleStack.push(swingStyle);
setStyle(swingStyle);
}
public void write(SimplePoint point, CanvasString canvasString) {
FontRenderContext frc = g2.getFontRenderContext();
TextLayout textLayout = new TextLayout(getAttributedCharacterIterator(canvasString), frc);
textLayout.draw(g2, (float) point.x, (float) point.y);
}
private AttributedCharacterIterator getAttributedCharacterIterator(
CanvasString canvasString) {
String main = canvasString.getMain();
String optionalPower = canvasString.getOptionalPower();
AttributedString string;
if (optionalPower == null) {
string = new AttributedString(main);
} else {
if (ViewUtil.renderExponentsAsSuperscript()) {
String plainText = main + optionalPower;
string = new AttributedString(plainText);
string.addAttribute(TextAttribute.SUPERSCRIPT, TextAttribute.SUPERSCRIPT_SUPER, main.length(), plainText.length());
} else {
string = new AttributedString(main + "^" + optionalPower);
}
}
string.addAttribute(TextAttribute.SIZE, 18f);
return string.getIterator();
}
}
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