/*
* WBI Indicator Explorer
*
* Copyright 2015 Sebastian Nogara <snogaraleal@gmail.com>
*
* This file is part of WBI.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package client.ui.views.indicator;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Widget;
import models.Indicator;
import client.managers.models.IndicatorManager;
import client.ui.components.MaterialItem;
import client.ui.components.MaterialSearch;
/**
* Indicator selector implementing {@link IndicatorManager.View}.
*/
public class IndicatorSelector extends Composite
implements IndicatorManager.View, IndicatorManager.Listener {
/**
* {@link MaterialItem} displaying an {@link Indicator}.
*/
public static class Item extends MaterialItem {
/**
* {@code IndicatorSelector} that created this item.
*/
private IndicatorSelector selector;
/**
* {@code Indicator} displayed in this item.
*/
private Indicator indicator;
/**
* Initialize {@code Item}.
*
* @param selector {@link IndicatorSelector} that created this item.
* @param indicator {@link Indicator} to display.
*/
public Item(IndicatorSelector selector, Indicator indicator) {
super();
this.selector = selector;
setIndicator(indicator);
setAnimationEnabled(true);
}
/**
* Set the {@link Indicator} displayed in this item.
*
* @param indicator {@code Indicator} to display.
*/
public void setIndicator(Indicator indicator) {
this.indicator = indicator;
setTitleText(indicator.getName());
setSubtitleText(indicator.getSource().getName());
setLoading(indicator.isLoading());
if (indicator.isReady()) {
setIconVisible(false);
} else {
setIconVisible(true);
setIcon(Icon.DOWNLOAD);
}
}
@Override
public void onClick(ClickEvent event) {
super.onClick(event);
IndicatorManager manager = selector.getCurrentManager();
manager.select(indicator);
}
}
public interface IndicatorSelectorUiBinder
extends UiBinder<Widget, IndicatorSelector> {}
private static IndicatorSelectorUiBinder uiBinder =
GWT.create(IndicatorSelectorUiBinder.class);
/**
* {@code Item} widgets by {@code Indicator}.
*/
private Map<Indicator, Item> map = new HashMap<Indicator, Item>();
/**
* {@code IndicatorManager} this view is currently attached to.
*/
private IndicatorManager manager;
/**
* Time required after a keystroke to perform a search.
*/
private static final int SEARCH_INPUT_DELAY = 300;
/**
* Text of {@link IndicatorSelector#search}.
*/
private String searchInputText;
/**
* Timer for performing a search.
*/
private Timer searchInputTimer;
/**
* Search box.
*/
@UiField
public MaterialSearch search;
/**
* Panel containing {@link Item} widgets.
*/
@UiField
public FlowPanel panel;
/**
* Initialize {@code IndicatorSelector}.
*/
public IndicatorSelector() {
initWidget(uiBinder.createAndBindUi(this));
searchInputTimer = new Timer() {
@Override
public void run() {
if (searchInputText != null && !searchInputText.isEmpty()) {
manager.search(searchInputText);
}
}
};
search.addKeyUpHandler(new KeyUpHandler() {
@Override
public void onKeyUp(KeyUpEvent event) {
searchInputText = search.getText().trim();
searchInputTimer.cancel();
if (searchInputText.isEmpty()) {
manager.clearSearch();
panel.clear();
map.clear();
Indicator selectedIndicator =
manager.getSelectedIndicator();
if (selectedIndicator != null) {
onSearch(
Arrays.asList(selectedIndicator),
selectedIndicator);
}
} else {
searchInputTimer.schedule(SEARCH_INPUT_DELAY);
}
}
});
}
@Override
public void onSearch(
List<Indicator> indicators,
Indicator selectedIndicator) {
panel.clear();
map.clear();
for (Indicator indicator : indicators) {
Item item = new Item(this, indicator);
panel.add(item);
map.put(indicator, item);
if (indicator.equals(selectedIndicator) && indicator.isReady()) {
item.setActive(true);
}
}
}
@Override
public void onChange(Indicator indicator) {
Item item = map.get(indicator);
if (item != null) {
item.setIndicator(indicator);
}
}
@Override
public void onSelect(Indicator indicator) {
if (searchInputText == null || searchInputText.isEmpty()) {
onSearch(Arrays.asList(indicator), indicator);
} else {
for (Item item : map.values()) {
item.setActive(false);
}
Item item = map.get(indicator);
if (item != null) {
item.setActive(true);
}
}
}
@Override
public void onAttach(IndicatorManager manager) {
assert this.manager == null;
this.manager = manager;
this.manager.addListener(this);
}
@Override
public void onDetach() {
assert this.manager != null;
this.manager.removeListener(this);
this.manager = null;
}
@Override
public Widget getWidget() {
return this;
}
@Override
public IndicatorManager getCurrentManager() {
return manager;
}
}