Symantec Visual Cafe for Java 2.5/symantec-visual-cafe-2.5-database-dev-edition.iso/VCafe/VCSAMPL.BIN/degrees.java

Java Source | 1997-09-08 | 5.2 KB | 186 lines

import java.awt.*;

public class degrees extends java.applet.Applet {

    boolean FSelected;

    public void init() {

        //{{INIT_CONTROLS
        GridBagLayout gridBagLayout;
        gridBagLayout = new GridBagLayout();
        setLayout(gridBagLayout);
        setSize(226,95);
        edit1 = new java.awt.TextField(15);
        edit1.setBounds(33,24,24,23);
        GridBagConstraints gbc;
        gbc = new GridBagConstraints();
        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        gbc.anchor = GridBagConstraints.SOUTH;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = new Insets(0,0,0,0);
        ((GridBagLayout)getLayout()).setConstraints(edit1, gbc);
        add(edit1);
        group1 = new CheckboxGroup();
        Fahrenheit = new java.awt.Checkbox("Fahrenheit", group1, true);
        Fahrenheit.setBounds(90,24,89,23);
        gbc = new GridBagConstraints();
        gbc.gridx = 1;
        gbc.gridy = 0;
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        gbc.anchor = GridBagConstraints.SOUTHWEST;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = new Insets(0,0,0,0);
        ((GridBagLayout)getLayout()).setConstraints(Fahrenheit, gbc);
        add(Fahrenheit);
        clearbutton = new java.awt.Button();
        clearbutton.setActionCommand("button");
        clearbutton.setLabel("Clear");
        clearbutton.setBounds(23,59,44,23);
        clearbutton.setBackground(new Color(8421504));
        gbc = new GridBagConstraints();
        gbc.gridx = 0;
        gbc.gridy = 1;
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = new Insets(0,0,0,0);
        ((GridBagLayout)getLayout()).setConstraints(clearbutton, gbc);
        add(clearbutton);
        Celcius = new java.awt.Checkbox("Celcius", group1, false);
        Celcius.setBounds(90,47,72,23);
        gbc = new GridBagConstraints();
        gbc.gridx = 1;
        gbc.gridy = 1;
        gbc.weightx = 1.0;
        gbc.weighty = 1.0;
        gbc.anchor = GridBagConstraints.NORTHWEST;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = new Insets(0,0,0,0);
        ((GridBagLayout)getLayout()).setConstraints(Celcius, gbc);
        add(Celcius);
        //}}

        FSelected = true;
        edit1.requestFocus();


        //{{REGISTER_LISTENERS
        SymItem lSymItem = new SymItem();
        Celcius.addItemListener(lSymItem);
        Fahrenheit.addItemListener(lSymItem);
        SymMouse lSymMouse = new SymMouse();
        clearbutton.addMouseListener(lSymMouse);
        //}}
        validate();
    }

    //{{DECLARE_CONTROLS
    java.awt.TextField edit1;
    java.awt.Checkbox Fahrenheit;
    CheckboxGroup group1;
    java.awt.Button clearbutton;
    java.awt.Checkbox Celcius;
    //}}
 //-------------------------------------------------------------
 // This file has been migrated from the 1.0 to 1.1 event model.
 // This method is not used with the new 1.1 event model. You can
 // move any code you need to keep, then remove this method.
 //-------------------------------------------------------------
 //
 //
 //     public boolean handleEvent(Event event) {
 //         if (event.id == Event.ACTION_EVENT && event.target == Celcius) {
 //                 clickedCelcius();
 //                 return true;
 //         }
 //         else
 //         if (event.id == Event.ACTION_EVENT && event.target == Fahrenheit) {
 //                 clickedFahrenheit();
 //                 return true;
 //         }
 //
 //         return super.handleEvent(event);
 //     }
 //-------------------------------------------------------------

    void clickedFahrenheit(java.awt.event.ItemEvent event) {

        float degree;

        if(FSelected == true) return;

        try {
            degree = (Float.valueOf(edit1.getText())).floatValue();
        } catch(NumberFormatException e) { return; }

        if( degree <= 0 )
            edit1.setBackground(Color.blue);
        else if( degree >= 100 )
                edit1.setBackground(Color.red);
             else edit1.setBackground(Color.white);

        edit1.setText(String.valueOf(1.8*degree+32));

        FSelected = true;

    }

    void clickedCelcius(java.awt.event.ItemEvent event) {

        float degree;

        if(FSelected == false) return;

        try {
            degree = (Float.valueOf(edit1.getText())).floatValue();
        } catch (NumberFormatException e) { return; }

        if( degree <= 32 )
            edit1.setBackground(Color.blue);
        else if( degree >= 212 )
                edit1.setBackground(Color.red);
             else edit1.setBackground(Color.white);
        edit1.setText(String.valueOf((degree-32.0)/1.8));

        FSelected = false;
    }

    class SymItem implements java.awt.event.ItemListener
    {
        public void itemStateChanged(java.awt.event.ItemEvent event)
        {
            Object object = event.getSource();
            if (object == Celcius)
                clickedCelcius(event);
            else if (object == Fahrenheit)
                clickedFahrenheit(event);
        }
    }

    class SymMouse extends java.awt.event.MouseAdapter
    {
        public void mouseClicked(java.awt.event.MouseEvent event)
        {
            Object object = event.getSource();
            if (object == clearbutton)
                clearbutton_MouseClick(event);
        }
    }

    void clearbutton_MouseClick(java.awt.event.MouseEvent event)
    {
        // to do: code goes here.

        //{{CONNECTION
        // Set the text for TextField...
        edit1.setText("");
        edit1.setBackground(Color.white);
        //}}
    }
}