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SWT Calendar
/**
* this is a example for Kalendar dialog for swt dialog.
*
* author: yin_zhiguo
*
* email: yin_zhiguo@hotmail.com
*
*/
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CLabel;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Dialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.events.MouseEvent;
public class KalendarDialog extends Dialog implements MouseListener {
private Display display = null;
private Date nowDate = null; //current date
private String selectedDate = null; //selected date
private Shell shell = null;
private GridLayout gridLayout = null;
private GridData gridData = null;
private CLabel sunday = null;
private CLabel monday = null;
private CLabel tuesday = null;
private CLabel wednesday = null;
private CLabel thursday = null;
private CLabel friday = null;
private CLabel saturday = null;
private Button yearUp = null;
private Button yearNext = null;
private Button monthUp = null;
private Button monthNext = null;
private CLabel nowLabel = null;
private CLabel[] days = new CLabel[42];
public KalendarDialog(Shell parent, int style) {
super(parent, style);
}
public KalendarDialog(Shell parent) {
this(parent, 0);
}
private int getLastDayOfMonth(int year, int month) {
if (month == 1 ||
month == 3 ||
month == 5 ||
month == 7 ||
month == 8 ||
month == 10 ||
month == 12) {
return 31;
}
if (month == 4 ||
month == 6 ||
month == 9 ||
month == 11) {
return 30;
}
if (month == 2) {
if (isLeapYear(year)) {
return 29;
} else {
return 28;
}
}
return 0;
}
public boolean isLeapYear(int year) {
return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
}
private void moveTo(int type, int value) {
Calendar now = Calendar.getInstance(); //get current Calendar object
now.setTime(nowDate); //set current date
now.add(type, value); //add to spec time.
nowDate = new Date(now.getTimeInMillis()); //result
SimpleDateFormat formatter = new
SimpleDateFormat("yyyy-MM");//format date
nowLabel.setText(formatter.format(nowDate)); //set to label
setDayForDisplay(now);
}
private void setDayForDisplay(Calendar now) {
int currentDay = now.get(Calendar.DATE);
now.add(Calendar.DAY_OF_MONTH, -(now.get(Calendar.DATE) - 1)); //
int startIndex = now.get(Calendar.DAY_OF_WEEK) - 1; //
int year = now.get(Calendar.YEAR); //
int month = now.get(Calendar.MONTH) + 1; //
int lastDay = this.getLastDayOfMonth(year, month); //
int endIndex = startIndex + lastDay - 1; //
int startday = 1;
for (int i = 0; i < 42; i++) {
Color temp = days[i].getBackground();
if (temp.equals(display.getSystemColor(SWT.COLOR_BLUE))) {
days[i].setBackground(display.getSystemColor(SWT.COLOR_WHITE));
}
}
for (int i = 0; i < 42; i++) {
if (i >= startIndex && i <= endIndex) {
days[i].setText("" + startday);
if (startday == currentDay) {
days[i].setBackground(display.getSystemColor(SWT.COLOR_BLUE)); //
}
startday++;
} else {
days[i].setText("");
}
}
}
public void previousYear() {
moveTo(Calendar.YEAR, -1);
}
public void nextYear() {
moveTo(Calendar.YEAR, 1);
}
public void nextMonth() {
moveTo(Calendar.MONTH, 1);
}
public void previousMonth() {
moveTo(Calendar.MONTH, -1);
}
public void mouseDoubleClick(MouseEvent e) {
CLabel day = (CLabel) e.getSource();
if(!day.getText().equals(""))
{
this.selectedDate = nowLabel.getText() + "-" + day.getText();
this.shell.close();
}
}
public void mouseDown(MouseEvent e) {}
public void mouseUp(MouseEvent e) {}
public Object open() {
Shell parent = getParent();
display = Display.getDefault();
shell = new Shell(parent, SWT.TITLE |SWT.PRIMARY_MODAL);
shell.setText("Calendar ver0.02");
shell.setSize(230, 220);
gridLayout = new GridLayout();
gridLayout.numColumns = 7;
shell.setLayout(gridLayout);
gridData = new GridData(GridData.FILL_HORIZONTAL);
yearUp = new Button(shell, SWT.PUSH | SWT.FLAT);
yearUp.setText("<");
yearUp.setLayoutData(gridData);
yearUp.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
previousYear();
}
});
gridData = new GridData(GridData.FILL_HORIZONTAL);
monthUp = new Button(shell, SWT.PUSH | SWT.FLAT);
monthUp.setText("<<");
monthUp.setLayoutData(gridData);
monthUp.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
previousMonth();
}
});
nowLabel = new CLabel(shell, SWT.CENTER | SWT.SHADOW_OUT);
gridData = new GridData(GridData.FILL_HORIZONTAL);
gridData.horizontalSpan = 3;
nowLabel.setLayoutData(gridData);
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM");
nowLabel.setText(formatter.format(new Date()));
gridData = new GridData(GridData.FILL_HORIZONTAL);
monthNext = new Button(shell, SWT.PUSH | SWT.FLAT);
monthNext.setText(">>");
monthNext.setLayoutData(gridData);
monthNext.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
nextMonth();
}
});
gridData = new GridData(GridData.FILL_HORIZONTAL);
yearNext = new Button(shell, SWT.PUSH | SWT.FLAT);
yearNext.setText(">");
yearNext.setLayoutData(gridData);
yearNext.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
nextYear();
}
});
sunday = new CLabel(shell, SWT.CENTER | SWT.SHADOW_OUT);
gridData = new GridData(GridData.FILL_HORIZONTAL |
GridData.FILL_VERTICAL);
gridData.widthHint = 20;
gridData.heightHint = 20;
sunday.setLayoutData(gridData);
sunday.setText("Sun");
monday = new CLabel(shell, SWT.CENTER | SWT.SHADOW_OUT);
gridData = new GridData(GridData.FILL_HORIZONTAL |
GridData.FILL_VERTICAL);
gridData.widthHint = 20;
gridData.heightHint = 20;
monday.setLayoutData(gridData);
monday.setText("Mon");
tuesday = new CLabel(shell, SWT.CENTER | SWT.SHADOW_OUT);
gridData = new GridData(GridData.FILL_HORIZONTAL |
GridData.FILL_VERTICAL);
gridData.widthHint = 20;
gridData.heightHint = 20;
tuesday.setLayoutData(gridData);
tuesday.setText("Tue");
wednesday = new CLabel(shell, SWT.CENTER | SWT.SHADOW_OUT);
gridData = new GridData(GridData.FILL_HORIZONTAL |
GridData.FILL_VERTICAL);
gridData.widthHint = 20;
gridData.heightHint = 20;
wednesday.setLayoutData(gridData);
wednesday.setText("Wed");
thursday = new CLabel(shell, SWT.CENTER | SWT.SHADOW_OUT);
gridData = new GridData(GridData.FILL_HORIZONTAL |
GridData.FILL_VERTICAL);
gridData.widthHint = 20;
gridData.heightHint = 20;
thursday.setLayoutData(gridData);
thursday.setText("Thu");
friday = new CLabel(shell, SWT.CENTER | SWT.SHADOW_OUT);
gridData = new GridData(GridData.FILL_HORIZONTAL |
GridData.FILL_VERTICAL);
gridData.widthHint = 20;
gridData.heightHint = 20;
friday.setLayoutData(gridData);
friday.setText("Fri");
saturday = new CLabel(shell, SWT.CENTER | SWT.SHADOW_OUT);
gridData = new GridData(GridData.FILL_HORIZONTAL |
GridData.FILL_VERTICAL);
gridData.widthHint = 20;
gridData.heightHint = 20;
saturday.setLayoutData(gridData);
saturday.setText("Sat");
for (int i = 0; i < 42; i++) {
days[i] = new CLabel(shell, SWT.FLAT | SWT.CENTER);
gridData = new GridData(GridData.FILL_HORIZONTAL |
GridData.FILL_VERTICAL);
days[i].setLayoutData(gridData);
days[i].setBackground(display.getSystemColor(SWT.COLOR_WHITE));
days[i].addMouseListener(this);
days[i].setToolTipText("double click get current date.");
}
Calendar now = Calendar.getInstance(); //
nowDate = new Date(now.getTimeInMillis());
setDayForDisplay(now);
shell.open();
Display display = parent.getDisplay();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
return selectedDate;
}
/**
* @param args
*/
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
shell.setText("");
FillLayout fl = new FillLayout();
shell.setLayout(fl);
Button open = new Button(shell, SWT.PUSH);
open.setText("open");
open.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
KalendarDialog cd = new KalendarDialog(shell);
System.out.println(cd.open());
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
}
