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GuyTrigTutor.java
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GuyTrigTutor.java
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/*
* GuyTrigTutor.java
*
* Created on June 17, 2004, 9:41 AM
*/
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.geom.*;
import java.awt.event.*;
import java.text.*;
import javax.swing.*;
import static java.awt.Font.BOLD;
/**
*
* @author Guy Lemire
*/
public class GuyTrigTutor extends JFrame {
// ViewPanel viewPanel;
private GuyTrigTutor(){
JPanel trigValuePanel = new JPanel();
JLabel sinLabel = new JLabel();
JLabel cosLabel = new JLabel();
JLabel tanLabel = new JLabel();
sinValue = new JTextField();
cosValue = new JTextField();
tanValue = new JTextField();
JLabel cartesLabel1 = new JLabel();
JLabel cartesLabel2 = new JLabel();
JLabel xLabel = new JLabel();
JLabel yLabel = new JLabel();
xCoordText = new JTextField();
yCoordText = new JTextField();
/* JLabel jPolarLabel1 = new JLabel();
JLabel jPolarLabel2 = new JLabel();*/
JLabel jRadianLabel = new JLabel();
jRadianText = new JTextField();
jRadiusField = new JTextField();
JPanel degreeControlPanel = new JPanel();
jSliderDegree = new JSlider();
jDegreeText = new JTextField();
JLabel jDegreeLabel = new JLabel();
JPanel viewPanel1 = new JPanel();
trigValuePanel.setBorder(BorderFactory.createTitledBorder("Trig Values"));
trigValuePanel.setPreferredSize(new Dimension(130, 500));
trigValuePanel.setLayout(null);
sinLabel.setText("SIN");
trigValuePanel.add(sinLabel);
sinLabel.setBounds(10, 30, 40, 14);
cosLabel.setText("COS");
trigValuePanel.add(cosLabel);
cosLabel.setBounds(10, 50, 40, 14);
tanLabel.setText("TAN");
trigValuePanel.add(tanLabel);
tanLabel.setBounds(10, 70, 40, 14);
sinValue.setEditable(false);
sinValue.setHorizontalAlignment(JTextField.CENTER);
sinValue.setPreferredSize(new Dimension(50, 20));
trigValuePanel.add(sinValue);
sinValue.setBounds(40, 30, 70, 20);
cosValue.setEditable(false);
cosValue.setHorizontalAlignment(JTextField.CENTER);
trigValuePanel.add(cosValue);
cosValue.setBounds(40, 50, 70, 20);
tanValue.setEditable(false);
tanValue.setHorizontalAlignment(JTextField.CENTER);
trigValuePanel.add(tanValue);
tanValue.setBounds(40, 70, 70, 20);
cartesLabel1.setText("CARTESIAN");
trigValuePanel.add(cartesLabel1);
cartesLabel1.setBounds(20, 110, 90, 14);
cartesLabel2.setText("COORDINATES");
trigValuePanel.add(cartesLabel2);
cartesLabel2.setBounds(10, 130, 110, 14);
xLabel.setText("X=");
trigValuePanel.add(xLabel);
xLabel.setBounds(30, 160, 20, 14);
yLabel.setText("Y=");
trigValuePanel.add(yLabel);
yLabel.setBounds(30, 180, 20, 14);
xCoordText.setEditable(false);
xCoordText.setHorizontalAlignment(JTextField.CENTER);
trigValuePanel.add(xCoordText);
xCoordText.setBounds(50, 160, 50, 20);
yCoordText.setEditable(false);
yCoordText.setHorizontalAlignment(JTextField.CENTER);
trigValuePanel.add(yCoordText);
yCoordText.setBounds(50, 180, 50, 20);
jRadianLabel.setFont(new Font("Arial", Font.PLAIN, 12));
jRadianLabel.setText("ANGLE (RADIANS)");
trigValuePanel.add(jRadianLabel);
jRadianLabel.setBounds(10, 270, 11090, 13);
jRadianText.setEditable(false);
jRadianText.setHorizontalAlignment(JTextField.CENTER);
trigValuePanel.add(jRadianText);
jRadianText.setBounds(20, 290, 70, 20);
getContentPane().add(trigValuePanel, BorderLayout.WEST);
degreeControlPanel.setBorder(BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED));
degreeControlPanel.setPreferredSize(new Dimension(600, 35));
jSliderDegree.setMaximum(360);
jSliderDegree.setMinorTickSpacing(5);
jSliderDegree.setPaintTicks(true);
jSliderDegree.setValue(45);
jSliderDegree.addChangeListener(evt1 -> jSliderDegreeStateChanged());
degreeControlPanel.add(jSliderDegree);
jDegreeText.setHorizontalAlignment(JTextField.CENTER);
jDegreeText.setText("45");
jDegreeText.setPreferredSize(new Dimension(30, 20));
jDegreeText.addActionListener(evt -> jDegreeTextActionPerformed());
jDegreeText.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent evt) {
jDegreeTextMouseClicked();
}
});
degreeControlPanel.add(jDegreeText);
jDegreeLabel.setText("Degrees");
degreeControlPanel.add(jDegreeLabel);
getContentPane().add(degreeControlPanel, BorderLayout.SOUTH);
viewPanel1.setPreferredSize(new Dimension(500, 500));
ViewPanel viewPanel=new ViewPanel();
viewPanel.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent evt) {
viewPanelMousePressed(evt);
}
public void mouseReleased(MouseEvent evt) {
viewPanelMouseReleased(evt);
}
public void mouseClicked(MouseEvent evt) {
viewPanelMouseClicked();
}
public void mouseExited(MouseEvent evt) {
viewPanelMouseExited();
}
public void mouseEntered(MouseEvent evt) {
viewPanelMouseEntered();
}
});
viewPanel.addMouseMotionListener(new MouseMotionAdapter() {
public void mouseMoved(MouseEvent evt) {
viewPanelMouseMoved();
}
public void mouseDragged(MouseEvent evt) {
viewPanelMouseDragged(evt);
}
});
viewPanel.setLayout(null);
getContentPane().add(viewPanel, BorderLayout.CENTER);
}// </editor-fold>//GEN-END:initComponents
private void viewPanelMouseEntered() {//GEN-FIRST:event_viewPanelMouseEntered
// Add your handling code here:
}//GEN-LAST:event_viewPanelMouseEntered
private void viewPanelMouseExited() {//GEN-FIRST:event_viewPanelMouseExited
// Add your handling code here:
}//GEN-LAST:event_viewPanelMouseExited
private void viewPanelMouseClicked() {//GEN-FIRST:event_viewPanelMouseClicked
// Add your handling code here:
}//GEN-LAST:event_viewPanelMouseClicked
private void viewPanelMouseReleased(MouseEvent evt) {//GEN-FIRST:event_viewPanelMouseReleased
isDraggingDot = false;
repaint();
evt.consume();
}//GEN-LAST:event_viewPanelMouseReleased
private void viewPanelMousePressed(MouseEvent evt) {//GEN-FIRST:event_viewPanelMousePressed
int new_x = evt.getX() - width / 2;
int new_y = height / 2 - evt.getY();
if (x - 3 < new_x && new_x < x + 3 && y - 3 < new_y && new_y < new_y + 3) {
isDraggingDot = true;
repaint();
}
evt.consume();
}//GEN-LAST:event_viewPanelMousePressed
private void viewPanelMouseDragged(MouseEvent evt) {//GEN-FIRST:event_viewPanelMouseDragged
// While Mouse is first pressed on "dot" and then dragged
// get new X and Y coordinates
if (isDraggingDot) {
// Get the latest position
x = evt.getX() - width / 2;
y = height / 2 - evt.getY();
// Move and paint the "dot" by the distance moved since last event
repaint();
evt.consume();
}
}//GEN-LAST:event_viewPanelMouseDragged
private void viewPanelMouseMoved() {//GEN-FIRST:event_viewPanelMouseMoved
// Add your handling code here:
}//GEN-LAST:event_viewPanelMouseMoved
private void jSliderDegreeStateChanged() {
// If "slider value changed, update "degree text"
jDegreeText.setText(String.valueOf(jSliderDegree.getValue()));
repaint();
}//GEN-LAST:event_jSliderDegreeStateChanged
private void jDegreeTextMouseClicked() {//GEN-FIRST:event_jDegreeTextMouseClicked
// Add your handling code here: // Clear the "degree text" when Mouse clicked on it
jDegreeText.setText("");
}//GEN-LAST:event_jDegreeTextMouseClicked
private void jDegreeTextActionPerformed() {//GEN-FIRST:event_jDegreeTextActionPerformed
// If new value entered in "degree text", update "slider" value
jSliderDegree.setValue(Integer.parseInt(jDegreeText.getText()));
repaint();
}//GEN-LAST:event_jDegreeTextActionPerformed
private int width;
private int height;
private int x;
private int y;
private boolean isDraggingDot = false;
// Paint panel
public class ViewPanel extends JPanel {
public void paintComponent(Graphics g) {
int hlines, vlines, radius;
// Get panel size in unit pixels
Rectangle r = getBounds();
height = r.height;
width = r.width;
// Move Cartesian X, Y coordinates to centre of panel
int centreX = r.width / 2;
int centreY = r.height / 2;
// Set-up maximum length of radius/hypotenuse
radius = Math.min(centreX, centreY) - 50;
g.setColor(new Color(255, 255, 240));// Get new colour
g.fillRect(0, 0, r.width, r.height); // Canvas background colour
// Draw grid
hlines = height / 10;
vlines = width / 10;
Graphics2D g2d = (Graphics2D) g;
AffineTransform old = g2d.getTransform();
g2d.translate(centreX, centreY);
g.setColor(Color.lightGray);
for (int i = -hlines / 2; i <= hlines / 2; i++) {
g.drawLine(-width / 2, i * 10, width / 2, i * 10);
}
for (int i = -vlines; i <= vlines / 2; i++) {
g.drawLine(i * 10, height / 2, i * 10, -height / 2);
}
// Draw Y, X axis
g.setColor(Color.magenta);
g.drawLine(-width / 2, 0, width / 2, 0); // X axis
g.drawLine(0, height / 2, 0, -height / 2); // Y axis
g2d.setTransform(old);
// Calculate radian angle of theta
double theta;
if (isDraggingDot) {
// Mouse pressed at "dot" and dragged, change value of angle
theta = Math.atan2(y, x); // Degree
// Convert to radians and change Slider value
while (theta < 0.0) {
theta += 2 * Math.PI;
}
jSliderDegree.setValue((int) Math.toDegrees(theta));
} // Mouse released, Mouse dragged "False"
else {
theta = (Math.toRadians(jSliderDegree.getValue()));
}
// Draw ring
g.setColor(Color.blue);
g.drawOval(centreX - radius, centreY - radius, radius * 2, radius * 2);
g.setColor(Color.red);
g.fillArc(centreX - 24, centreY - 24, 48, 48, 0, (jSliderDegree.getValue()));
// Draw dot on circle
if (isDraggingDot) {
g.setColor(Color.orange); // Change "dot" colour if Mouse pressed on it
} else {
g.setColor(Color.red); // Normal "dot" colour
} // Get centre of "dot"
int arrowTipX = centreX + (int) (radius * Math.cos(theta));
int arrowTipY = centreY - (int) (radius * Math.sin(theta));
g.fillOval(arrowTipX - 5, arrowTipY - 5, 10, 10);
//Draw hypotenuse (radius), side adjacent & side opposite lines
g.setColor(Color.black);
g.drawLine(centreX, centreY, arrowTipX, arrowTipY); // Radius
g.drawLine(centreX, centreY, centreX + (int) (radius * Math.cos(theta)), centreY); // Side Adjacent
g.drawLine(arrowTipX, arrowTipY, centreX + (int) (radius * Math.cos(theta)), centreY); // Side Opposite
// Draw PI value labels and dots
g.drawString("PI /6", centreX + 6 + (int) (radius * Math.cos(.5236)), centreY + 3 - (int) (radius * Math.sin(.5236)));
g.fillOval(centreX + (int) (radius * Math.cos(.5236)), centreY - (int) (radius * Math.sin(.5236)), 7, 7);
g.drawString("PI /4", centreX + 6 + (int) (radius * Math.cos(.7854)), centreY + 3 - (int) (radius * Math.sin(.7854)));
g.fillOval(centreX + (int) (radius * Math.cos(.7854)), centreY - (int) (radius * Math.sin(.7854)), 7, 7);
g.drawString("PI /3", centreX + 8 + (int) (radius * Math.cos(1.0472)), centreY + 5 - (int) (radius * Math.sin(1.0472)));
g.fillOval(centreX + (int) (radius * Math.cos(1.0472)), centreY - (int) (radius * Math.sin(1.0472)), 7, 7);
g.fillOval(centreX -3 + (int) (radius * Math.cos(1.5708)), centreY - 5 - (int) (radius * Math.sin(1.5708)), 8, 8);
g.drawString("PI 2/3", centreX - 36 + (int) (radius * Math.cos(2.0944)), centreY - 5 - (int) (radius * Math.sin(2.0944)));
g.fillOval(centreX - 7 + (int) (radius * Math.cos(2.0944)), centreY - (int) (radius * Math.sin(2.0944)), 7, 7);
g.fillOval(centreX - 4 + (int) (radius * Math.cos(3.1416)), centreY - 4- (int) (radius * Math.sin(0.0)), 8, 8);
g.fillOval(centreX - 4 + (int) (radius * Math.cos(0.0)), centreY - 4- (int) (radius * Math.sin(0.0)), 8, 8);
// Draw axes value
g.setFont(new Font("Serif", BOLD, 14));
g.drawString("Y", centreX - 11, 15);
g.drawString("PI/2", centreX - 15, 40);
g.drawString("-X", 10, centreY - 5);
g.drawString("(3.1416)", 140, centreY - 5);
g.drawString("PI (Radian)", 120, centreY +19);
g.drawString("-Y", centreX - 18, height - 10);
g.drawString("PI 3/2", centreX - 18, height - 35);
g.drawString("X", width - 40, centreY - 5);
g.drawString("0", width - 210, centreY - 5);
// Display Trig values
DecimalFormat form1 = new DecimalFormat("#0.0000"); // Round-off values
// DecimalFormat form2 = new DecimalFormat("#0.0E0");
jRadianText.setText(String.valueOf(form1.format(theta)));
sinValue.setText(String.valueOf(form1.format(Math.sin(theta))));
cosValue.setText(String.valueOf(form1.format(Math.cos(theta))));
if ((Math.tan(theta)) <= 99.9) {
jRadiusField.setText(String.valueOf(radius));
tanValue.setText(String.valueOf(form1.format(Math.tan(theta))));
} else //tanValue.setText("Infinity");
{
tanValue.setText(" \u221E");
}
// Calculate X, Y coordinates
x = arrowTipX - r.width / 2;
y = r.height / 2 - arrowTipY;
// Display X, Y coordinates
xCoordText.setText(String.valueOf(x));
yCoordText.setText(String.valueOf(y));
g.setColor(Color.black);
g.setFont(new Font("Serif", BOLD,18));
g.drawString("SIN = SIDE OPPOSITE OVER HYPOTHENUS",10,25);
g.drawString("COS = SIDE ADJACENT OVER HYPOTHENUS",10,50);
g.drawString("TAN = SIDE OPPOSITE OVER SIDE ADJACENT",10,75);
g.setFont(new Font("Serif", BOLD,18));
g.drawString("Use Mouse Pointer to Move ",centreX+126,25);
g.setColor(Color.red);
g.drawString("NOTE:",centreX + 50,25);
g.drawString("Red Dot",centreX+415,25);
g.drawString("NOTE:",10,930);
g.drawString("You can also use the Slider to change angle",96,930);
}
}
public static void main(String[] args) {
GuyTrigTutor frame = new GuyTrigTutor();
frame.setSize ( 1400,1000 );
frame.setLocationRelativeTo(null); // set window to appropriate size (for its elements)
frame.setVisible(true); // usual step to make frame visible
}
private JTextField cosValue;
private JTextField jDegreeText;
private JTextField jRadianText;
private JTextField jRadiusField;
private JSlider jSliderDegree;
private JTextField sinValue;
private JTextField tanValue;
private JTextField xCoordText;
private JTextField yCoordText;
// End of variables declaration//GEN-END:variables
}