Java tutorial
/* This file is part of Intake24. Copyright 2015, 2016 Newcastle University. 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. This file is based on Intake24 v1.0. Crown copyright, 2012, 2013, 2014 Licensed under the Open Government Licence 3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/ */ package uk.ac.ncl.openlab.intake24.client.survey; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.Label; import org.pcollections.PVector; import org.workcraft.gwt.shared.client.Callback1; import org.workcraft.gwt.shared.client.CollectionUtils.WithIndex; import org.workcraft.gwt.shared.client.Function1; import org.workcraft.gwt.shared.client.Option; import org.workcraft.gwt.shared.client.Option.SideEffectVisitor; import uk.ac.ncl.openlab.intake24.client.UnorderedList; import static org.workcraft.gwt.shared.client.CollectionUtils.filter; import static org.workcraft.gwt.shared.client.CollectionUtils.zipWithIndex; public class MealPanel extends Composite { private final static SurveyMessages messages = SurveyMessages.Util.getInstance(); private final int mealIndex; private final Selection selection; private final Callback1<Selection> requestSelectionChange; private void addFoodRow(UnorderedList<FlowPanel> list, final WithIndex<FoodEntry> f) { String desc = f.value.description(); FlowPanel foodRow = new FlowPanel(); foodRow.addStyleName("intake24-food"); Label foodLabel = new Label(desc); foodLabel.addStyleName("intake24-food-name"); if (!f.value.link.linkedTo.isEmpty()) foodLabel.addStyleName("intake24-linked-food-name"); foodLabel.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { requestSelectionChange .call(new Selection.SelectedFood(mealIndex, f.index, SelectionMode.MANUAL_SELECTION)); } }); FlowPanel encodingComplete = new FlowPanel(); FlowPanel portionSizeComplete = new FlowPanel(); if (!f.value.isTemplate()) { foodRow.add(portionSizeComplete); foodRow.add(encodingComplete); } foodRow.add(foodLabel); if (!f.value.isRaw()) { encodingComplete.addStyleName("intake24-checkbox-checked-icon"); encodingComplete.setTitle(messages.navPanelMatchedTooltip()); } else { encodingComplete.addStyleName("intake24-checkbox-unchecked-icon"); encodingComplete.setTitle(messages.navPanelNotMatchedTooltip()); } if (f.value.isPortionSizeComplete()) { portionSizeComplete.addStyleName("intake24-checkbox-checked-icon"); portionSizeComplete.setTitle(messages.navPanelPortionSizeComplete()); } else { portionSizeComplete.addStyleName("intake24-checkbox-unchecked-icon"); portionSizeComplete.setTitle(messages.navPanelPortionSizeIncomplete()); } boolean thisFoodSelected = selection.accept(new Selection.Visitor<Boolean>() { @Override public Boolean visitMeal(Selection.SelectedMeal meal) { return false; } @Override public Boolean visitFood(Selection.SelectedFood food) { return (food.mealIndex == mealIndex) && (food.foodIndex == f.index); } @Override public Boolean visitNothing(Selection.EmptySelection selection) { return false; } }); if (thisFoodSelected) foodRow.addStyleName("intake24-selected-food"); list.addItem(foodRow); } public MealPanel(final Meal meal, final int mealIndex, final Selection selection, final Callback1<Selection> requestSelectionChange) { this.mealIndex = mealIndex; this.selection = selection; this.requestSelectionChange = requestSelectionChange; FlowPanel contents = new FlowPanel(); initWidget(contents); boolean thisMealSelected = selection.accept(new Selection.Visitor<Boolean>() { @Override public Boolean visitMeal(Selection.SelectedMeal meal) { return meal.mealIndex == mealIndex; } @Override public Boolean visitFood(Selection.SelectedFood food) { return false; } @Override public Boolean visitNothing(Selection.EmptySelection selection) { return false; } }); final FlowPanel mealRow = new FlowPanel(); mealRow.addStyleName("intake24-meal"); if (thisMealSelected) mealRow.addStyleName("intake24-selected-meal"); final Label label = new Label(meal.name); label.addStyleName("intake24-meal-name"); label.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { requestSelectionChange.call(new Selection.SelectedMeal(mealIndex, SelectionMode.MANUAL_SELECTION)); } }); meal.time.accept(new SideEffectVisitor<Time>() { @Override public void visitSome(Time item) { Label timeLabel = new Label(meal.time.getOrDie().toString()); timeLabel.addStyleName("intake24-meal-time"); mealRow.add(timeLabel); } @Override public void visitNone() { final FlowPanel questionIcon = new FlowPanel(); questionIcon.addStyleName("intake24-meal-question-icon"); questionIcon.setTitle(messages.navPanelSuggestedTooltip()); mealRow.add(questionIcon); } }); mealRow.add(label); contents.add(mealRow); if (!meal.foods.isEmpty()) { UnorderedList<FlowPanel> foodList = new UnorderedList<FlowPanel>(); foodList.addStyleName("intake24-food-list"); PVector<WithIndex<FoodEntry>> withIndex = zipWithIndex(meal.foods); PVector<WithIndex<FoodEntry>> topLevel = filter(withIndex, new Function1<WithIndex<FoodEntry>, Boolean>() { @Override public Boolean apply(WithIndex<FoodEntry> argument) { return argument.value.link.linkedTo.isEmpty(); } }); for (final WithIndex<FoodEntry> f : topLevel) { addFoodRow(foodList, f); PVector<WithIndex<FoodEntry>> linkedToThis = filter(withIndex, new Function1<WithIndex<FoodEntry>, Boolean>() { @Override public Boolean apply(WithIndex<FoodEntry> argument) { return argument.value.link.linkedTo.accept(new Option.Visitor<UUID, Boolean>() { @Override public Boolean visitSome(UUID item) { return item.equals(f.value.link.id); } @Override public Boolean visitNone() { return false; } }); } }); for (final WithIndex<FoodEntry> linked : linkedToThis) { addFoodRow(foodList, linked); } } contents.add(foodList); } } }