paint.java

This is project of paint soure code

import java.awt.*;
import java.awt.event.*;
/*
<applet code="Paint" width=1000 height=500>
</applet>
*/

public class Paint extends javax.swing.JApplet
{
  
    Object myColorString;
    int lineThickness = 1;
    
    int prevX = 0;
    int prevY = 0;
    
    /** Initializes the applet Paint */
    public void init() 
	{
        try {
            java.awt.EventQueue.invokeAndWait(new Runnable()
			{
                
                public void run() 
				{
                    initComponents();
                    
                    colorComboBox.addItem("Black");
                    colorComboBox.addItem("Red");
                    colorComboBox.addItem("Orange");
                    colorComboBox.addItem("Yellow");
                    colorComboBox.addItem("Green");
                    colorComboBox.addItem("Blue");

                }
            });
        } catch (Exception ex) 
		{
            ex.printStackTrace();
        }
    }
     private void initComponents() 
	 {
        java.awt.GridBagConstraints gridBagConstraints;
		buttonGroup1 = new javax.swing.ButtonGroup();
        jPanel1 = new javax.swing.JPanel();
        colorComboBox = new javax.swing.JComboBox();
        jRadioButton1 = new javax.swing.JRadioButton();
        jRadioButton2 = new javax.swing.JRadioButton();
        jRadioButton3 = new javax.swing.JRadioButton();
        jButton1 = new javax.swing.JButton();
        jPanel3 = new javax.swing.JPanel();
        drawPanel = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();

        getContentPane().setLayout(new java.awt.GridBagLayout());

        jPanel1.setLayout(null);

        jPanel1.setMinimumSize(new java.awt.Dimension(500, 330));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.ipadx = -1;
        gridBagConstraints.ipady = -1;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        getContentPane().add(jPanel1, gridBagConstraints);

        colorComboBox.addItemListener(new java.awt.event.ItemListener() {
            public void itemStateChanged(java.awt.event.ItemEvent evt) {
                colorComboBoxHandler(evt);
            }
        });

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 2;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.ipadx = 4;
        gridBagConstraints.ipady = 2;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(6, 40, 0, 0);
        getContentPane().add(colorComboBox, gridBagConstraints);

        buttonGroup1.add(jRadioButton1);
        jRadioButton1.setSelected(true);
        jRadioButton1.setText("Thin");
        jRadioButton1.addMouseListener(new java.awt.event.MouseAdapter() 
		{
            public void mouseClicked(java.awt.event.MouseEvent evt) 
			{
                thinLineHandler(evt);
            }
        });

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 2;
        gridBagConstraints.gridy = 4;
        gridBagConstraints.gridwidth = 2;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 40, 0, 0);
        getContentPane().add(jRadioButton1, gridBagConstraints);

        buttonGroup1.add(jRadioButton2);
        jRadioButton2.setText("Medium");
        jRadioButton2.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                mediumLineHandler(evt);
            }
        });

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 2;
        gridBagConstraints.gridy = 5;
        gridBagConstraints.gridwidth = 5;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(7, 40, 0, 0);
        getContentPane().add(jRadioButton2, gridBagConstraints);

        buttonGroup1.add(jRadioButton3);
        jRadioButton3.setText("Thick");
        jRadioButton3.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                thickLineHandler(evt);
            }
        });

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 2;
        gridBagConstraints.gridy = 6;
        gridBagConstraints.gridwidth = 3;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(7, 40, 0, 0);
        getContentPane().add(jRadioButton3, gridBagConstraints);

        jButton1.setText("Clear");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                clearHandler(evt);
            }
        });

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 2;
        gridBagConstraints.gridy = 7;
        gridBagConstraints.gridwidth = 4;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(37, 40, 0, 0);
        getContentPane().add(jButton1, gridBagConstraints);

        jPanel3.setLayout(null);

        jPanel3.setBorder(new javax.swing.border.TitledBorder(new javax.swing.border.LineBorder(new java.awt.Color(51, 0, 255), 2, true), "Draw Below!", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Comic Sans MS", 0, 11)));
        drawPanel.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
            public void mouseDragged(java.awt.event.MouseEvent evt) {
                myMouseDragPaint(evt);
            }
        });
        drawPanel.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseReleased(java.awt.event.MouseEvent evt) {
                myMouseReleasedHandler(evt);
            }
        });

        jPanel3.add(drawPanel);
        drawPanel.setBounds(10, 18, 230, 270);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.gridwidth = 2;
        gridBagConstraints.gridheight = 9;
        gridBagConstraints.ipadx = 249;
        gridBagConstraints.ipady = 299;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        getContentPane().add(jPanel3, gridBagConstraints);

        jLabel1.setText("Choose Line Thickness:");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 2;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.gridwidth = 7;
        gridBagConstraints.gridheight = 2;
        gridBagConstraints.ipady = 6;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(18, 40, 0, 56);
        getContentPane().add(jLabel1, gridBagConstraints);

        jLabel2.setText("Choose Line Color:");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 2;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.gridwidth = 6;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(30, 40, 0, 0);
        getContentPane().add(jLabel2, gridBagConstraints);

    }
    // </editor-fold>//GEN-END:initComponents

    private void myMouseDragPaint(java.awt.event.MouseEvent evt) 
	{//GEN-FIRST:event_myMouseDragPaint
        
            Graphics G = drawPanel.getGraphics();
            
            int currX = evt.getX();
            int currY = evt.getY();
            
            //Previous coordinates will only be 0,0 if this is a new line.
            //If this is the case, set previous coords equal to new coords
            //which will begin a new line.
            if (prevX == 0) { prevX = currX; }
            if (prevY == 0) { prevY = currY; }
            
            //If-else group to set the line color based on the global color value.
            if (myColorString == "Red") 
			{
                G.setColor(Color.red);
            }
			else if (myColorString == "Orange") 
			{
                G.setColor(Color.orange);
            }
			else if (myColorString == "Yellow") 
			{
                G.setColor(Color.yellow);
            }
			else if (myColorString == "Green") 
			{
                G.setColor(Color.green);
            }
			else if (myColorString == "Blue") 
			{
                G.setColor(Color.blue);
            }
			else 
			{
                G.setColor(Color.black);
            }
            
            //Switch statement to set the line thickness based on the global
            //line thickness value.
            switch (lineThickness)
			{
                case 1:
					G.drawLine(prevX, prevY, currX, currY);
					break;
                case 2:
					G.drawRect(currX, currY, 1, 1);
					break;
                case 3:
					G.drawRect(currX, currY, 2, 2);
					break;
                default:
					G.drawLine(prevX, prevY, currX, currY);
					break;
            }
            
            //Set previous coords equal to current coords to create a smooth line.
            prevX = currX;
            prevY = currY;
    }//GEN-LAST:event_myMouseDragPaint

    private void thickLineHandler(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_thickLineHandler
        //Set global line thickness value to 3, meaning a thick line.
        lineThickness = 3;
    }//GEN-LAST:event_thickLineHandler

    private void mediumLineHandler(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_mediumLineHandler
        //Set global line thickness value to 2, meaning a medium line.
        lineThickness = 2;
    }//GEN-LAST:event_mediumLineHandler

    private void thinLineHandler(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_thinLineHandler
        //Set global line thickness value to 1, meaning a thin line.
        lineThickness = 1;
    }//GEN-LAST:event_thinLineHandler

    private void clearHandler(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_clearHandler
        //Clear the drawing panel when the Clear button is pushed.
        Graphics G = drawPanel.getGraphics();
        G.setColor(drawPanel.getBackground());
        G.fillRect(0,0,drawPanel.getBounds().width,drawPanel.getBounds().height);
    }//GEN-LAST:event_clearHandler

    private void myMouseReleasedHandler(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_myMouseReleasedHandler
        //Reset coordinates to 0,0 indicating that the line has been broken
        prevX = 0;
        prevY = 0;
    }//GEN-LAST:event_myMouseReleasedHandler

    private void colorComboBoxHandler(java.awt.event.ItemEvent evt) {//GEN-FIRST:event_colorComboBoxHandler
        //Set new color value globally when color value is changed in 
        //the combo box.
        myColorString = evt.getItem();
    }//GEN-LAST:event_colorComboBoxHandler
    
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.ButtonGroup buttonGroup1;
    private javax.swing.JComboBox colorComboBox;
    private javax.swing.JPanel drawPanel;
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JRadioButton jRadioButton1;
    private javax.swing.JRadioButton jRadioButton2;
    private javax.swing.JRadioButton jRadioButton3;
    // End of variables declaration//GEN-END:variables
    
}