eu.future.earth.gwt.client.DateBoxInternal Maven / Gradle / Ivy

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The Gwt Calendar UI
There is a newer version: 3.3
package eu.future.earth.gwt.client;

import java.util.Calendar;
import java.util.Date;

import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.ui.TextBox;

import eu.future.earth.gwt.client.date.DateUtils;

public class DateBoxInternal extends TextBox {

	public final static String DEFAULT_DATE_FORMAT = "dd-MM-yyyy";

	private String format = null;

	private DateTimeFormat date = null;

	public DateBoxInternal() {
		this(DEFAULT_DATE_FORMAT);
	}

	public DateBoxInternal(String format) {
		super();
		super.sinkEvents(Event.ONKEYDOWN);
		setFormat(format);
	}

	public void onBrowserEvent(Event event) {
		int eventType = DOM.eventGetType(event);
		int keyCode = event.getKeyCode();

		switch (eventType) {
		case Event.ONKEYDOWN: {
			// if (keyCode == 37 || keyCode == 39 || keyCode == 18 || keyCode == 9 || keyCode == 8) {
			if (keyCode == 37 || keyCode == 39 || keyCode == 18 || keyCode == 9) {
				super.onBrowserEvent(event);
				return;
			} else {
				if (isInt(keyCode)) {
					final int cursor = super.getCursorPos();
					if (cursor >= format.length()) {

					} else {
						final String temp = super.getText();
						final char rep = format.charAt(cursor);
						if (rep == '-' || rep == '/') {
							super.setCursorPos(cursor + 1);
						} else {
							char next = (char) -1;
							if (format.length() > cursor + 1) {
								next = format.charAt(cursor + 1);
							}
							final char newChar = ((char) convert(keyCode));
							boolean allow = false;
							if (rep == 'd' && next == 'd') {
								if (newChar == '0' || newChar == '1' || newChar == '2' || newChar == '3') {
									allow = true;
								}
							} else {
								if (rep == 'd') {
									final char prev = temp.charAt(cursor - 1);
									if (prev == '3') {
										if (newChar == '0' || newChar == '1') {
											allow = true;
										}
									} else {
										allow = true;
									}

								}
							}

							if (rep == 'M' && next == 'M') {
								if (newChar == '0' || newChar == '1') {
									allow = true;
								}
							} else {
								if (rep == 'M') {
									final char prev = temp.charAt(cursor - 1);
									if (prev == '0') {
										allow = true;
									} else {
										if (newChar == '0' || newChar == '1' || newChar == '2') {
											allow = true;
										}

									}
								}
							}

							if (rep == 'y') {
								allow = true;
							}

							if (allow) {
								final String newString = temp.substring(0, cursor) + newChar + temp.substring(cursor + 1, format.length());
								super.setText(newString);
								if (next == '-' || rep == '/') {
									super.setCursorPos(cursor + 2);
								} else {
									super.setCursorPos(cursor + 1);
								}

							}

						}
					}
					event.preventDefault();
					return;

				} else {
					if (keyCode == 8) {

						final int cursor = super.getCursorPos() - 1;
						if (cursor >= format.length() || cursor < 0) {

						} else {
							String sel = super.getSelectedText();
							if (sel != null && sel.length() > 2) {
								super.setText(format);
								super.setCursorPos(0);
							} else {
								final String temp = super.getText();
								final char rep = format.charAt(cursor);
								final String newString = temp.substring(0, cursor) + rep + temp.substring(cursor + 1, format.length());
								super.setText(newString);
								super.setCursorPos(cursor);
							}
						}
						event.preventDefault();
					} else {
						event.preventDefault();
						return;
					}
				}

			}

		}
		default:
			super.onBrowserEvent(event);
		}
	}

	private int convert(int keyCode) {
		if (keyCode > 60) {
			return keyCode - 48;
		} else {
			return keyCode;
		}
	}

	private boolean isInt(int keyCode) {
		if (keyCode >= 96 && keyCode <= 105) {
			return true;
		}
		if (keyCode >= 48 && keyCode <= 57) {
			return true;
		}
		return false;
	}

	public void setDate(Date newValue) {
		if (newValue != null) {
			super.setText(date.format(newValue));
		} else {
			super.setText(format);
		}
	}

	private boolean isParsable() {
		if (getText() == null) {
			return false;
		}
		if (getText().length() != format.length()) {
			return false;
		}
		return DateParser.testParsable(getText(), format);
	}

	public Date getDate() {
		if (isParsable()) {
			try {
				Calendar helper = DateUtils.createCalendar();
				helper.setTime(date.parse(getText()));
				helper.add(Calendar.HOUR_OF_DAY, 12);
				return helper.getTime();
			} catch (IllegalArgumentException ex) {
				return null;
			} catch (Exception ex) {
				return null;
			}
		}
		return null;
	}

	public String getFormat() {
		return format;
	}

	public void setFormat(String format) {
		this.format = format;
		date = DateTimeFormat.getFormat(format);
		super.setText(format);
		super.setMaxLength(format.length());
	}

}