prefpageone.java

一些介绍J2ME的经典源码,对于在手机上开发应用很有帮助

package ejfaceintegrationsample;

import java.io.IOException;
import org.eclipse.jface.preference.*;
import org.eclipse.swt.*;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import ejfaceintegrationsample.views.*;

public class PrefPageOne extends PreferencePage implements IWorkbenchPreferencePage{
	//Names for preferences
	private static final String SERVERADDR   = "SERVERADDR";
	private static final String USERNAME     = "USERNAME";
	private static final String USERPASSWORD = "USERPASSWORD";
	
	//Text fields for user to enter preferences
	private Text fieldOne;
	private Text fieldTwo;
	private Text fieldThree;
	
    //Declare required component
	Label label1, label2, label3;
	Composite composite;
	Button defaultbutton;
	PreferenceStore preferenceStoreNBA,preferenceStoreMLB;
	
	//creates the controls for this page
	protected Control createContents(Composite parent){
		composite = new Composite(parent, SWT.NONE);
		composite.setLayout(new GridLayout(2,false));
		
		preferenceStoreNBA = new PreferenceStore("nba"); //$NON-NLS-1$
		try {
	      preferenceStoreNBA.load();
	    } catch (IOException e) {}
	    
		preferenceStoreMLB = new PreferenceStore("mlb"); //$NON-NLS-1$
		try {
	      preferenceStoreMLB.load();
	    } catch (IOException e) {}
	    
		//Create three text fields
		label1 = new Label(composite, SWT.LEFT);
		label1.setText("Server address:");
		label1.setBackground(new Color(composite.getDisplay(),0x66, 0xCC, 0xFF));
		fieldOne = new Text(composite, SWT.SINGLE | SWT.BORDER);
		fieldOne.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		
		
		label2 = new Label(composite, SWT.LEFT);
		label2.setText("Username:");
		fieldTwo = new Text(composite, SWT.SINGLE | SWT.BORDER);
		fieldTwo.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		
		
		label3 = new Label(composite, SWT.LEFT);
		label3.setText("Password:");
		fieldThree = new Text(composite, SWT.SINGLE | SWT.BORDER | SWT.PASSWORD);
		fieldThree.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		
        //Set the default value of these three text fields
		SetDefaultValue();
		
		//Get the value from preferenceStore and show in Text field
		if(SampleView.NBAorMLB==1){
		  fieldOne  .setText(preferenceStoreNBA.getString(SERVERADDR));
		  fieldTwo  .setText(preferenceStoreNBA.getString(USERNAME));
		  fieldThree.setText(preferenceStoreNBA.getString(USERPASSWORD));
		}else{
	      fieldOne  .setText(preferenceStoreMLB.getString(SERVERADDR));
	      fieldTwo  .setText(preferenceStoreMLB.getString(USERNAME));
		  fieldThree.setText(preferenceStoreMLB.getString(USERPASSWORD));
		}
		
		//Set the Restore button and perform restore to default value
		//Once this button is clicked
		defaultbutton = new Button(composite,SWT.PUSH | SWT.LEFT);
		defaultbutton.setText("Restore to Default value");
		defaultbutton.addSelectionListener(new SelectionListener(){
			public void widgetSelected(SelectionEvent e) {;
				performDefaults();
			}
			public void widgetDefaultSelected(SelectionEvent e) {
			}});
		
		return composite;
	}
	
	/**
	 * Called when user clicks Restore button
	 */ 
	protected void performDefaults(){
		//Reset the fields to the defaults
		if(SampleView.NBAorMLB==1){
			fieldOne  .setText(preferenceStoreNBA.getDefaultString(SERVERADDR));
			fieldTwo  .setText(preferenceStoreNBA.getDefaultString(USERNAME));
			fieldThree.setText(preferenceStoreNBA.getDefaultString(USERPASSWORD));
		}else{
			fieldOne  .setText(preferenceStoreMLB.getDefaultString(SERVERADDR));
			fieldTwo  .setText(preferenceStoreMLB.getDefaultString(USERNAME));
			fieldThree.setText(preferenceStoreMLB.getDefaultString(USERPASSWORD));			
		}
	}
	
	/**
	 * Called when user clicks Apply or OK
	 */
	public boolean performOk(){
		//Set the values from the fields
		if(SampleView.NBAorMLB==1){
			if(fieldOne   != null && fieldOne  .getCharCount() != 0) preferenceStoreNBA.setValue(SERVERADDR,   fieldOne  .getText());
			if(fieldTwo   != null && fieldTwo  .getCharCount() != 0) preferenceStoreNBA.setValue(USERNAME,     fieldTwo  .getText());
			if(fieldThree != null && fieldThree.getCharCount() != 0) preferenceStoreNBA.setValue(USERPASSWORD, fieldThree.getText());
			try {
		        preferenceStoreNBA.save();
			} catch (IOException e) {
		        return false;
			}
		}else{
			if(fieldOne   != null && fieldOne  .getCharCount() != 0) preferenceStoreMLB.setValue(SERVERADDR,   fieldOne  .getText());
			if(fieldTwo   != null && fieldTwo  .getCharCount() != 0) preferenceStoreMLB.setValue(USERNAME,     fieldTwo  .getText());
			if(fieldThree != null && fieldThree.getCharCount() != 0) preferenceStoreMLB.setValue(USERPASSWORD, fieldThree.getText());
			try {
		        preferenceStoreMLB.save();
			} catch (IOException e) {
		        return false;
			}			
		}
		
		//Retrun true to allow dialog to close
		return true;
	}
	
	/**
	 * Called when initially setting default value of each fields
	 */
	private void SetDefaultValue() {
		if (fieldOne != null && fieldOne.getCharCount() == 0) {
			if(SampleView.NBAorMLB ==1){
		     preferenceStoreNBA.setDefault(SERVERADDR, "www.nba.com");
			}else{
			 preferenceStoreMLB.setDefault(SERVERADDR, "www.mlb.com");
			}
		}
		if (fieldTwo != null && fieldTwo.getCharCount() == 0) {
			if(SampleView.NBAorMLB ==1){
		     preferenceStoreNBA.setDefault(USERNAME, "NBA Admin");
			}else{
			 preferenceStoreMLB.setDefault(USERNAME, "MLB Admin");
			}
		}
		if (fieldThree != null && fieldThree.getCharCount() == 0) {
			if(SampleView.NBAorMLB ==1){
			 preferenceStoreNBA.setDefault(USERPASSWORD, "nbaadmin");
			}else{
			 preferenceStoreMLB.setDefault(USERPASSWORD, "mlbadmin");
			}
		}		
		
	}
	
	/**
	 * Called when user clicks Cancel
	 */
	public boolean performCancel() {
		composite.dispose();
		this.dispose();
		return true;
    }

	public void init(IWorkbench arg0) {
		// TODO Auto-generated method stub
	}
}