Java tutorial
package uk.co.intec.keyDatesApp.components; /* <!-- Copyright 2015 Paul Withers Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License --> */ import java.text.DateFormatSymbols; import java.util.Date; import java.util.GregorianCalendar; import java.util.Locale; import com.vaadin.server.FontAwesome; import com.vaadin.shared.ui.MarginInfo; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent; import com.vaadin.ui.Button.ClickListener; import com.vaadin.ui.Calendar; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Label; import com.vaadin.ui.VerticalLayout; import com.vaadin.ui.components.calendar.CalendarComponentEvents.DateClickEvent; import com.vaadin.ui.components.calendar.CalendarComponentEvents.WeekClick; import com.vaadin.ui.components.calendar.CalendarComponentEvents.WeekClickHandler; import com.vaadin.ui.components.calendar.handler.BasicDateClickHandler; import com.vaadin.ui.components.calendar.handler.BasicWeekClickHandler; import com.vaadin.ui.themes.ValoTheme; import uk.co.intec.keyDatesApp.model.KeyDateDatabaseUtils; /** * @author Paul Withers<br/> * <br/> * Navigation buttons for Calendar component, extended from Vaadin * example, to be found here: * https://dev.vaadin.com/git/?p=addons/calendar/calendar.git;a=tree;f= * demo/src/com/vaadin/addon/calendar/demo;h= * 2e801aaff657193b6fc3cd893316821dc6a44dec;hb= * 251b9e563e341e00be105c9c2f6c451fa33c633e * */ public class DateSelector extends VerticalLayout { private static final long serialVersionUID = 1L; private Calendar calLayout; private GregorianCalendar calendar; private Date currentMonthsFirstDate; private final Label captionLabel = new Label(""); private Button monthButton; private Button weekButton; private Button nextButton; private Button prevButton; private Mode viewMode = Mode.MONTH; /** * @author Paul Withers * * Enum for calendar mode - MONTH, WEEK, DAY */ private enum Mode { MONTH, WEEK, DAY; } /** * Getter for calLayout * * @return Calendar Vaadin calendar component */ public Calendar getCalLayout() { return calLayout; } /** * Setter for calLayout * * @param calLayout * Calendar Vaadin calendar component this selector is tied to */ public void setCalLayout(Calendar calLayout) { this.calLayout = calLayout; } /** * Constructor, passing the Vaadin Calendar component this selector is tied * to * * @param cal */ public DateSelector(Calendar cal) { try { setLocale(Locale.getDefault()); setCalLayout(cal); calendar = new GregorianCalendar(getLocale()); calendar.setTime(getCalLayout().getStartDate()); currentMonthsFirstDate = calendar.getTime(); addCalendarEventListeners(); initNavigationButtons(); updateCaptionLabel(); final HorizontalLayout hl = new HorizontalLayout(); hl.setWidth("100%"); hl.setSpacing(true); hl.setMargin(new MarginInfo(false, false, true, false)); hl.addComponent(prevButton); hl.setComponentAlignment(prevButton, Alignment.MIDDLE_LEFT); final HorizontalLayout monthButtonPanel = new HorizontalLayout(); monthButtonPanel.addComponent(monthButton); hl.addComponent(monthButtonPanel); hl.setComponentAlignment(monthButtonPanel, Alignment.MIDDLE_CENTER); captionLabel.addStyleName(ValoTheme.LABEL_COLORED); captionLabel.setWidth(null); hl.addComponent(captionLabel); hl.setComponentAlignment(captionLabel, Alignment.MIDDLE_CENTER); final HorizontalLayout weekButtonPanel = new HorizontalLayout(); weekButtonPanel.addComponent(weekButton); hl.addComponent(weekButtonPanel); hl.setComponentAlignment(weekButtonPanel, Alignment.MIDDLE_CENTER); hl.addComponent(nextButton); hl.setComponentAlignment(nextButton, Alignment.MIDDLE_RIGHT); monthButton.setVisible(viewMode == Mode.WEEK); weekButton.setVisible(viewMode == Mode.DAY); addComponent(hl); } catch (final Throwable t) { KeyDateDatabaseUtils.handleException(t); } } /** * Adds event listeners to extend default Vaadin Calendar functionality when * the user clicks on a week number or date */ @SuppressWarnings("serial") private void addCalendarEventListeners() { // Register week clicks by changing the schedules start and end dates. getCalLayout().setHandler(new BasicWeekClickHandler() { /* * (non-Javadoc) * * @see * com.vaadin.ui.components.calendar.handler.BasicWeekClickHandler# * weekClick(com.vaadin.ui.components.calendar. * CalendarComponentEvents.WeekClick) */ @Override public void weekClick(WeekClick event) { // let BasicWeekClickHandler handle calendar dates, and update // only the other parts of UI here super.weekClick(event); updateCaptionLabel(); switchToWeekView(); calendar.setTime(getCalLayout().getStartDate()); } }); getCalLayout().setHandler(new BasicDateClickHandler() { /* * (non-Javadoc) * * @see * com.vaadin.ui.components.calendar.handler.BasicDateClickHandler# * dateClick(com.vaadin.ui.components.calendar. * CalendarComponentEvents.DateClickEvent) */ @Override public void dateClick(DateClickEvent event) { // let BasicDateClickHandler handle calendar dates, and update // only the other parts of UI here super.dateClick(event); switchToDayView(); calendar.setTime(getCalLayout().getStartDate()); } }); } /** * Adds additional navigation buttons for Month view, Week view, Next and * Prev */ private void initNavigationButtons() { monthButton = new Button("Month view"); monthButton.addStyleName(ValoTheme.BUTTON_QUIET); monthButton.addStyleName(ValoTheme.BUTTON_SMALL); monthButton.addClickListener(new ClickListener() { private static final long serialVersionUID = 1L; /* * (non-Javadoc) * * @see * com.vaadin.ui.Button.ClickListener#buttonClick(com.vaadin.ui. * Button.ClickEvent) */ @Override public void buttonClick(ClickEvent event) { switchToMonthView(); } }); weekButton = new Button("Week view"); weekButton.addStyleName(ValoTheme.BUTTON_QUIET); weekButton.addStyleName(ValoTheme.BUTTON_SMALL); weekButton.addClickListener(new ClickListener() { private static final long serialVersionUID = 1L; /* * (non-Javadoc) * * @see * com.vaadin.ui.Button.ClickListener#buttonClick(com.vaadin.ui. * Button.ClickEvent) */ @Override public void buttonClick(ClickEvent event) { // simulate week click final WeekClickHandler handler = (WeekClickHandler) getCalLayout().getHandler(WeekClick.EVENT_ID); handler.weekClick(new WeekClick(getCalLayout(), calendar.get(GregorianCalendar.WEEK_OF_YEAR), calendar.get(GregorianCalendar.YEAR))); } }); prevButton = new Button("Prev"); prevButton.addStyleName(ValoTheme.BUTTON_FRIENDLY); prevButton.setIcon(FontAwesome.ANGLE_LEFT); prevButton.addClickListener(new Button.ClickListener() { private static final long serialVersionUID = 1L; /* * (non-Javadoc) * * @see * com.vaadin.ui.Button.ClickListener#buttonClick(com.vaadin.ui. * Button.ClickEvent) */ @Override public void buttonClick(ClickEvent event) { handlePreviousButtonClick(); } }); nextButton = new Button("Next"); nextButton.addStyleName(ValoTheme.BUTTON_FRIENDLY); nextButton.addStyleName(ValoTheme.BUTTON_ICON_ALIGN_RIGHT); nextButton.setIcon(FontAwesome.ANGLE_RIGHT); nextButton.addClickListener(new Button.ClickListener() { private static final long serialVersionUID = 1L; /* * (non-Javadoc) * * @see * com.vaadin.ui.Button.ClickListener#buttonClick(com.vaadin.ui. * Button.ClickEvent) */ @Override public void buttonClick(ClickEvent event) { handleNextButtonClick(); } }); } /** * Handle what should happen when Next button is clicked, depending on * current Mode (DAY, WEEK, MONTH) */ private void handleNextButtonClick() { switch (viewMode) { case MONTH: nextMonth(); break; case WEEK: nextWeek(); break; case DAY: nextDay(); break; } } /** * Handle what should happen when Prev button is clicked, depending on * current Mode (DAY, WEEK, MONTH) */ private void handlePreviousButtonClick() { switch (viewMode) { case MONTH: previousMonth(); break; case WEEK: previousWeek(); break; case DAY: previousDay(); break; } } /** * Roll month forward by one */ private void nextMonth() { rollMonth(1); } /** * Roll month back by one */ private void previousMonth() { rollMonth(-1); } /** * Roll week forward by one */ private void nextWeek() { rollWeek(1); } /** * Roll week back by one */ private void previousWeek() { rollWeek(-1); } /** * Roll day forward by one */ private void nextDay() { rollDate(1); } /** * Roll day back by one */ private void previousDay() { rollDate(-1); } /** * Roll month in a specific direction, updating start date of Vaadin * Calendar component, updating caption label in the middle of the selector * and resetting the calendar time * * @param direction * int direction, 1 for forward or -1 for backward */ private void rollMonth(int direction) { calendar.setTime(currentMonthsFirstDate); calendar.add(GregorianCalendar.MONTH, direction); resetTime(false); currentMonthsFirstDate = calendar.getTime(); getCalLayout().setStartDate(currentMonthsFirstDate); updateCaptionLabel(); calendar.add(GregorianCalendar.MONTH, 1); calendar.add(GregorianCalendar.DATE, -1); resetCalendarTime(true); } /** * Roll week in a specific direction, updating start date of Vaadin Calendar * component and resetting the calendar time * * @param direction * int direction, 1 for forward or -1 for backward */ private void rollWeek(int direction) { calendar.add(GregorianCalendar.WEEK_OF_YEAR, direction); calendar.set(GregorianCalendar.DAY_OF_WEEK, calendar.getFirstDayOfWeek()); resetCalendarTime(false); resetTime(true); calendar.add(GregorianCalendar.DATE, 6); getCalLayout().setEndDate(calendar.getTime()); } /** * Roll date in a specific direction, updating start date of Vaadin Calendar * component and resetting the calendar time * * @param direction * int direction, 1 for forward or -1 for backward */ private void rollDate(int direction) { calendar.add(GregorianCalendar.DATE, direction); resetCalendarTime(false); resetCalendarTime(true); } /** * Update the month label in the middle of the selector */ private void updateCaptionLabel() { final DateFormatSymbols s = new DateFormatSymbols(getLocale()); final String month = s.getShortMonths()[calendar.get(GregorianCalendar.MONTH)]; captionLabel.setValue(month + " " + calendar.get(GregorianCalendar.YEAR)); } /* * Switch the view to week view. */ public void switchToWeekView() { viewMode = Mode.WEEK; weekButton.setVisible(false); monthButton.setVisible(true); } /* * Switch the Calendar component's start and end date range to the target * month only. (sample range: 01.01.2010 00:00.000 - 31.01.2010 23:59.999) */ public void switchToMonthView() { viewMode = Mode.MONTH; monthButton.setVisible(false); weekButton.setVisible(false); calendar.setTime(currentMonthsFirstDate); getCalLayout().setStartDate(currentMonthsFirstDate); updateCaptionLabel(); calendar.add(GregorianCalendar.MONTH, 1); calendar.add(GregorianCalendar.DATE, -1); resetCalendarTime(true); } /* * Switch to day view (week view with a single day visible). */ public void switchToDayView() { viewMode = Mode.DAY; monthButton.setVisible(true); weekButton.setVisible(true); } /** * Amend either the end time or the start time of the Vaadin Calendar * component the selector is bound to * * @param resetEndTime * boolean whether or not to reset the end time */ private void resetCalendarTime(boolean resetEndTime) { resetTime(resetEndTime); if (resetEndTime) { getCalLayout().setEndDate(calendar.getTime()); } else { getCalLayout().setStartDate(calendar.getTime()); updateCaptionLabel(); } } /* * Resets the calendar time (hour, minute second and millisecond) either to * zero or maximum value. */ private void resetTime(boolean max) { if (max) { calendar.set(GregorianCalendar.HOUR_OF_DAY, calendar.getMaximum(GregorianCalendar.HOUR_OF_DAY)); calendar.set(GregorianCalendar.MINUTE, calendar.getMaximum(GregorianCalendar.MINUTE)); calendar.set(GregorianCalendar.SECOND, calendar.getMaximum(GregorianCalendar.SECOND)); calendar.set(GregorianCalendar.MILLISECOND, calendar.getMaximum(GregorianCalendar.MILLISECOND)); } else { calendar.set(GregorianCalendar.HOUR_OF_DAY, 0); calendar.set(GregorianCalendar.MINUTE, 0); calendar.set(GregorianCalendar.SECOND, 0); calendar.set(GregorianCalendar.MILLISECOND, 0); } } }