elementscreen.java.svn-base

j2me mobile application for upload file to server.

package org.celllife.clforms;

import java.util.Date;
import java.util.Vector;

import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.ChoiceGroup;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.DateField;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.TextField;
import javax.microedition.lcdui.Ticker;

import org.celllife.clforms.api.XFElement;

import de.enough.polish.util.Iterator;
import de.enough.polish.util.Locale;

public class ElementScreen extends MVCComponent {

	private XFElement e;

	private static Displayable screen = null;

	private static Command backCommand;

	private static Command saveCommand;

	private static Command nextCommand;

	private static TextField commentField;

	private static DateField datePicker;

	private static ChoiceGroup selectChoice;
	
	private int screenIndex;
	private int totalScreens;
	
	private String trueString = Locale.get("text.true"); //$NON-NLS-1$
	private String falseString = Locale.get("text.false"); //$NON-NLS-1$

	public ElementScreen(XFElement e) {
		this.e = e;
	}
	
	public ElementScreen(XFElement e, int screenIndex, int totalScreens) {
		this.e = e;
		this.screenIndex = screenIndex;
		this.totalScreens = totalScreens;
	}
	
	public Displayable getScreen() {
		return screen;
	}

	public void save() {

		switch (e.getDataType()) {
		case Constants.INT:
			if (commentField.getString().length() != 0){				
				e.setValue(new Integer(Integer.parseInt(commentField.getString())));				
			}
			else {
				e.setValue(null);
			}
			break;
		case Constants.STRING:
			e.setValue(commentField.getString());
			break;
		case Constants.DATE:
			e.setValue(datePicker.getDate());
			break;
		case Constants.SELECT1:
			String choice = selectChoice.getString(selectChoice
					.getSelectedIndex());
			e.setSelectedIndex(selectChoice.getSelectedIndex());
			e.setValue(e.getSelect().get(choice));
			break;
		case Constants.SELECT:
 
			// Find the selected values and add them to a vector
			boolean selected[] = new boolean[selectChoice.size()];
			// Fill array indicating whether each element is checked
			selectChoice.getSelectedFlags(selected);
			
			Vector chosenValues = new Vector();
			
			for (int i = 0; i < selectChoice.size(); i++){
				if (selected[i])
					chosenValues.addElement(e.getSelect().get(selectChoice.getString(i)));
			}
			e.setValue(chosenValues);
			break;
		case Constants.BOOLEAN:
			
			String result = selectChoice.getString(selectChoice
					.getSelectedIndex());
			
			e.setSelectedIndex(selectChoice.getSelectedIndex());
			if (result.equals(this.trueString)){
				e.setValue(new Boolean(true));				
			}else
				e.setValue(new Boolean(false));
			
			break;
		}
	}
	
	/*
	 * Method checks if element is required, i.e. cannot be empty
	 * returns false if element is not required or is not empty
	 * returns true if element is required AND is empty
	 */
	public boolean checkRequired() {
		boolean result = false;
		//only if the XFElement is required we perform the check
		if (e.isRequired()){
			
			switch (e.getDataType()) {
			case Constants.INT:
				if (commentField.getString().length() == 0){				
					result = true;
				}
				else {
					result = false;
				}
				break;
			case Constants.STRING:
				if (commentField.getString().length() == 0){				
					result = true;
				}
				else {
					result = false;
				}
				break;
			case Constants.DATE:			
				if (datePicker.getDate() == null){				
					result = true;
				}
				else {
					result = false;
				}
				break;
			case Constants.SELECT1:
				// TODO - this is always has a default selected -how do we handle this?
				result = false;
				
				break;
			case Constants.SELECT:
				
				// Find the selected values and add them to a vector
				boolean selected[] = new boolean[selectChoice.size()];
				// Fill array indicating whether each element is checked
				selectChoice.getSelectedFlags(selected);
				result = true;
				for (int i = 0; i < selectChoice.size(); i++){
					if (selected[i])
						result = false;
				}				
				break;
			case Constants.BOOLEAN:
				// TODO - this is always has a default selected -how do we handle this?
				result = false;
				
				break;
			}
		}
		
		return result;
	}

	
	public void requiredAlert(){
		
		Alert alert = new Alert(Locale.get("text.alert")); //$NON-NLS-1$
        alert.setType(AlertType.WARNING);

        alert.setTimeout(Alert.FOREVER);
        alert.setString(Locale.get("error.required")); //$NON-NLS-1$

        display.setCurrent(alert);
		
	}
	
	public void commandAction(Command c, Displayable s) {
		try {
			if (c == backCommand) {
				save();
				(new XFormScreen()).showScreen();
			} else if (c == saveCommand) {
				save();
				(new XFormScreen()).showScreen();
			} else if (c == nextCommand) {
				
				if (!checkRequired()){
					save();
					(new XFormScreen()).getNextElementScreen();					
				}
				else
					requiredAlert();							
			}
		} catch (Exception e) {
			Alert a = new Alert(Locale.get("error.screen") + " 2"); //$NON-NLS-1$
			a.setString(e.getMessage());
			a.setTimeout(Alert.FOREVER);
			display.setCurrent(a);
		}
	}

	// Initialize. If a data member is not backed by RMS, make sure
	// it is uninitilzed (null) before you put in values.
	protected void initModel() throws Exception {

	}

	protected void createView() throws Exception {
		backCommand = new Command(Locale.get("menu.main"), Command.BACK, 2); //$NON-NLS-1$
		// saveCommand = new Command("SAVE", Command.OK, 1);
		nextCommand = new Command(Locale.get("menu.next"), Command.OK, 1); //$NON-NLS-1$

		// screen by type
		switch (e.getDataType()) {
		case Constants.INT:
			intForm();
			break;
		case Constants.STRING:
			stringForm();
			break;
		case Constants.DATE:
			dateForm();
			break;
		case Constants.SELECT1:
			select1Form();
			break;
		case Constants.SELECT:
			selectForm();
			break;
		case Constants.BOOLEAN:
			booleanForm();
			break;
		}
		
		setHint();
		
		screen.addCommand(backCommand);
		screen.addCommand(nextCommand);
	}




	public void setHint(){
		Ticker t = new Ticker(Locale.get("text.hint")+e.getHintText());
		((Form) screen).setTicker(t); //$NON-NLS-1$
	}
	
	
	private void intForm() {

		commentField = new TextField(e.getLabel(), "", 40, TextField.NUMERIC); //$NON-NLS-1$
		String[] parameters = new String[2];
		parameters[0] = new Integer(screenIndex+1).toString();
		parameters[1] = new Integer(this.totalScreens).toString();
		screen = new Form(Locale.get("text.progress", parameters));

		//check if the field has already been filled in - if so display value
		if (e.getValue() != null){
			commentField.setString(((Integer)e.getValue()).toString());
		}
		
		((Form) screen).append(commentField);

	}

	private void stringForm() {

		commentField = new TextField(e.getLabel(), "", 40, TextField.ANY); //$NON-NLS-1$
		String[] parameters = new String[2];
		parameters[0] = new Integer(screenIndex+1).toString();
		parameters[1] = new Integer(this.totalScreens).toString();
		screen = new Form(Locale.get("text.progress", parameters));
		
		//check if the field has already been filled in - if so display value
		if (e.getValue() != null){
			commentField.setString((String)e.getValue());
		}


		((Form) screen).append(commentField);

	}

	private void dateForm() {

		datePicker = new DateField(e.getLabel(), DateField.DATE);
		
		String[] parameters = new String[2];
		parameters[0] = new Integer(screenIndex+1).toString();
		parameters[1] = new Integer(this.totalScreens).toString();
		screen = new Form(Locale.get("text.progress", parameters));
		
		//check if the field has already been filled in - if so display value
		if (e.getValue() != null){
			datePicker.setDate((Date)e.getValue());
		}

		((Form) screen).append(datePicker);

	}

	private void select1Form() {

		selectChoice = new ChoiceGroup(e.getLabel(), ChoiceGroup.EXCLUSIVE);

		Iterator itr = e.getSelect().keysIterator();
		int i =0;
		while (itr.hasNext()) {
			String label = (String) itr.next();
			selectChoice.append(label, null);
			i++;
		}

		String[] parameters = new String[2];
		parameters[0] = new Integer(screenIndex+1).toString();
		parameters[1] = new Integer(this.totalScreens).toString();
		screen = new Form(Locale.get("text.progress", parameters));
		
		//check if the field has already been filled in - if so display value
		if (e.getValue() != null){
			selectChoice.setSelectedIndex(e.getSelectedIndex(),true);
		}
		
		// ((Form) screen).append(e.getHintText());
		((Form) screen).append(selectChoice);

	}

	private void selectForm() {

		selectChoice = new ChoiceGroup(e.getLabel(), ChoiceGroup.MULTIPLE);

		Iterator itr = e.getSelect().keysIterator();
		int i = 0;
		Vector v = null;
		if(e.getValue() != null){
			v = (Vector) e.getValue();
		}
		while (itr.hasNext()) {
			String label = (String) itr.next();
			selectChoice.append(label, null);
			
			if(e.getValue() != null){
				
				try{
					if(v.contains(e.getSelect().get(label)))
						selectChoice.setSelectedIndex(i,true);					
				}
				catch(ClassCastException e){
					System.out.println(Locale.get("error.type")); //$NON-NLS-1$
					e.printStackTrace();
				}
				
			}
			i++;
		}

		String[] parameters = new String[2];
		parameters[0] = new Integer(screenIndex+1).toString();
		parameters[1] = new Integer(this.totalScreens).toString();
		screen = new Form(Locale.get("text.progress", parameters));
		// ((Form) screen).append(e.getHintText());
		((Form) screen).append(selectChoice);

	}

	private void booleanForm() {
		
		selectChoice = new ChoiceGroup(e.getLabel(), ChoiceGroup.EXCLUSIVE);

		selectChoice.append(this.trueString, null);
		selectChoice.append(this.falseString, null);

		String[] parameters = new String[2];
		parameters[0] = new Integer(screenIndex+1).toString();
		parameters[1] = new Integer(this.totalScreens).toString();
		screen = new Form(Locale.get("text.progress", parameters));
		
		//check if the field has already been filled in - if so display value
		if (e.getValue() != null){
			selectChoice.setSelectedIndex(e.getSelectedIndex(),true);
		}

		((Form) screen).append(selectChoice);
		
	}

	protected void updateView() throws Exception {
		createView();
	}

}