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Copy pathDrawingPanel.java
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352 lines (316 loc) · 11.6 KB
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package java_paint;
import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.ArrayList;
/**
*
* DrawingPanel class is where the drawing functions take place.
* Using the mouse we can draw lines or areas. This functionality is achieved by implementing the
* MouseListener and MouseMotionListener interfaces.
*
* The paint() method overrides the javax.swing.JComponent.paint() method.
* And it is refreshing the JPanel for us.
*
* @author
*
*/
public class DrawingPanel extends JPanel implements MouseListener, MouseMotionListener {
/**
*
*/
private static final long serialVersionUID = 1L;
private MainContainer window;
private Point initialPoint;
private Point finalPoint;
private GeneralPath polygonPath;
private ArrayList<BrushStroke> drawings = new ArrayList<BrushStroke>();
private boolean isPolygonFirstVertex;
public DrawingPanel(MainContainer frameWindow) {
this.isPolygonFirstVertex = true;
this.polygonPath = new GeneralPath();
this.window = frameWindow;
this.setBackground(Color.WHITE);
addMouseListener(this);
addMouseMotionListener(this);
}
@Override
public void paint(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
String brushChoice = window.getBrushType();
drawAllPreviousFigures(g2);
if (brushChoice.equals("polygon")) {
drawPolygon(g2);
}
if (wasMouseMoved()) {
g2.setColor(window.getBrushColor());
if (brushChoice.equals("pencil")) {
// implemented in mousePressed and mouseDragged
} else if (brushChoice.equals("line")) {
drawLine(g2);
} else if (brushChoice.equals("rectangle")) {
drawRectangle(g2);
} else if (brushChoice.equals("ellipse")) {
drawEllipse(g2);
} else if (brushChoice.equals("arc")) {
drawArc(g2);
}
}
}
private void drawAllPreviousFigures(Graphics2D g2) {
for (BrushStroke drawing : drawings) {
g2.setColor(drawing.getColor());
g2.setStroke(new BasicStroke(drawing.getThickness()));
if (drawing.isFilled() && !(drawing.getShape() instanceof Line2D.Float)) {
g2.fill(drawing.getShape());
} else {
g2.draw(drawing.getShape());
}
}
}
private void drawPolygon(Graphics2D g2) {
int border = 10;
if (wasMouseMoved() &&
initialPoint.x > finalPoint.x - border &&
initialPoint.x < finalPoint.x + border &&
initialPoint.y > finalPoint.y - border &&
initialPoint.y < finalPoint.y + border) {
drawings.add(new BrushStroke(polygonPath,
window.getBrushColor(),
window.getBrushThickness(),
window.isFigureFilled()));
polygonPath = new GeneralPath();
initialPoint = null;
finalPoint = null;
isPolygonFirstVertex = true;
repaint();
} else {
g2.setColor(window.getBrushColor());
g2.setStroke(new BasicStroke(window.getBrushThickness()));
g2.draw(polygonPath);
}
}
private void drawLine(Graphics2D g2) {
BrushStroke lineStroke = createLine(initialPoint.x, initialPoint.y,
finalPoint.x, finalPoint.y,
window.getBrushColor(), window.getBrushThickness(), window.isFigureFilled());
g2.setStroke(new BasicStroke(lineStroke.getThickness()));
g2.draw(lineStroke.getShape());
}
private void drawRectangle(Graphics2D g2) {
BrushStroke rectangle = createRectangle(initialPoint.x, initialPoint.y, finalPoint.x,
finalPoint.y, window.getBrushColor(), window.getBrushThickness(),
window.isFigureFilled());
g2.setStroke(new BasicStroke(rectangle.getThickness()));
g2.draw(rectangle.getShape());
}
private void drawEllipse(Graphics2D g2) {
BrushStroke ellipse = createEllipse(initialPoint.x, initialPoint.y, finalPoint.x,
finalPoint.y, window.getBrushColor(), window.getBrushThickness(),
window.isFigureFilled());
g2.setStroke(new BasicStroke(ellipse.getThickness()));
g2.draw(ellipse.getShape());
}
private void drawArc(Graphics2D g2) {
BrushStroke arc = createArc(initialPoint.x, initialPoint.y, finalPoint.x, finalPoint.y,
window.getBrushColor(), window.getBrushThickness(), window.isFigureFilled());
g2.setStroke(new BasicStroke(arc.getThickness()));
g2.draw(arc.getShape());
}
private boolean wasMouseMoved() {
return initialPoint != null && finalPoint != null;
}
public void mousePressed(MouseEvent e) {
String brushChoice = window.getBrushType();
if (brushChoice.equals("pencil")) {
setInitialMousePosition(e);
repaint();
} else if (brushChoice.equals("line")) {
setInitialMousePosition(e);
updateMousePosition();
repaint();
} else if (brushChoice.equals("rectangle")) {
setInitialMousePosition(e);
updateMousePosition();
repaint();
} else if (brushChoice.equals("ellipse")) {
setInitialMousePosition(e);
updateMousePosition();
repaint();
} else if (brushChoice.equals("arc")) {
setInitialMousePosition(e);
updateMousePosition();
repaint();
} else if (brushChoice.equals("polygon")) {
if (isPolygonFirstVertex) {
setInitialMousePosition(e);
polygonPath.moveTo(e.getX(), e.getY());
isPolygonFirstVertex = false;
} else {
setFinalMousePosition(e);
polygonPath.lineTo(e.getX(), e.getY());
}
repaint();
}
}
public void mouseDragged(MouseEvent e) {
String brushChoice = window.getBrushType();
if (brushChoice.equals("pencil")) {
addFreeHandLine(e);
initialPoint = new Point(finalPoint.x, finalPoint.y);
repaint();
} else if (brushChoice.equals("line")) {
setFinalMousePosition(e);
repaint();
} else if (brushChoice.equals("rectangle")) {
setFinalMousePosition(e);
repaint();
} else if (brushChoice.equals("ellipse")) {
setFinalMousePosition(e);
repaint();
} else if (brushChoice.equals("arc")) {
setFinalMousePosition(e);
repaint();
}
}
public void mouseReleased(MouseEvent e) {
String brushChoice = window.getBrushType();
if (brushChoice.equals("pencil")) {
addFreeHandLine(e);
repaint();
} else if (brushChoice.equals("line")) {
addFreeHandLine(e);
initialPoint = null;
finalPoint = null;
repaint();
} else if (brushChoice.equals("rectangle")) {
addRectangle(e);
initialPoint = null;
finalPoint = null;
repaint();
} else if (brushChoice.equals("ellipse")) {
addEllipse(e);
initialPoint = null;
finalPoint = null;
repaint();
} else if (brushChoice.equals("arc")) {
addArc(e);
initialPoint = null;
finalPoint = null;
repaint();
}
}
public void addFreeHandLine(MouseEvent e) {
setFinalMousePosition(e);
BrushStroke line = createLine(initialPoint.x, initialPoint.y, finalPoint.x,
finalPoint.y, window.getBrushColor(), window.getBrushThickness(),
window.isFigureFilled());
drawings.add(line);
}
private BrushStroke createLine(int x1, int y1, int x2, int y2, Color color, int thickness,
boolean filledOption) {
return new BrushStroke(new Line2D.Float(x1, y1, x2, y2), color, thickness, filledOption);
}
public void addRectangle(MouseEvent e) {
setFinalMousePosition(e);
BrushStroke rectangle = createRectangle(initialPoint.x, initialPoint.y, finalPoint.x,
finalPoint.y, window.getBrushColor(), window.getBrushThickness(),
window.isFigureFilled());
drawings.add(rectangle);
}
private BrushStroke createRectangle(int x1, int y1, int x2, int y2, Color color, int thickness,
boolean filledOption) {
return new BrushStroke(
new Rectangle2D.Float(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x1 - x2),
Math.abs(y1 - y2)),
color, thickness, filledOption);
}
public void addEllipse(MouseEvent e) {
BrushStroke ellipse = createEllipse(initialPoint.x, initialPoint.y, e.getX(), e.getY(),
window.getBrushColor(), window.getBrushThickness(), window.isFigureFilled());
drawings.add(ellipse);
}
private BrushStroke createEllipse(int x1, int y1, int x2, int y2, Color color, int thickness,
boolean filledOption) {
return new BrushStroke(
new Ellipse2D.Float(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x1 - x2),
Math.abs(y1 - y2)),
color, thickness, filledOption);
}
public void addArc(MouseEvent e) {
BrushStroke arc = createArc(initialPoint.x, initialPoint.y, e.getX(), e.getY(),
window.getBrushColor(), window.getBrushThickness(), window.isFigureFilled());
drawings.add(arc);
}
private BrushStroke createArc(int x1, int y1, int x2, int y2, Color color, int thickness,
boolean filledOption) {
int initialValueDegrees = 0;
int finalValueDegrees = 90;
if (x1 > x2 && y1 < y2) {
initialValueDegrees = 90;
}
if (x1 < x2 && y1 > y2) {
finalValueDegrees = -90;
}
if (x1 > x2 && y1 > y2) {
initialValueDegrees = 180;
finalValueDegrees = 90;
}
return new BrushStroke(
new Arc2D.Float(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x1 - x2),
Math.abs(y1 - y2), initialValueDegrees, finalValueDegrees, Arc2D.OPEN),
color, thickness, filledOption);
}
public void setInitialMousePosition(MouseEvent e) {
initialPoint = new Point(e.getX(), e.getY());
}
public void setFinalMousePosition(MouseEvent e) {
finalPoint = new Point(e.getX(), e.getY());
}
public void updateMousePosition() {
finalPoint = initialPoint;
}
public void clearDrawing() {
drawings.clear();
repaint();
}
public void undo() {
if (!drawings.isEmpty()) {
drawings.remove(drawings.size() - 1);
}
}
public void saveDrawingToFile(String filePath) {
BufferedImage image = new BufferedImage(getWidth(), getHeight(),
BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = image.createGraphics();
paint(g2);
try{
ImageIO.write(image, "png", new File(filePath));
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void mouseMoved(MouseEvent e) {
// Intentionally empty to implement inherited abstract method
}
@Override
public void mouseClicked(MouseEvent e) {
// Intentionally empty to implement inherited abstract method
}
@Override
public void mouseEntered(MouseEvent e) {
// Intentionally empty to implement inherited abstract method
}
@Override
public void mouseExited(MouseEvent e) {
// Intentionally empty to implement inherited abstract method
}
}
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