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Extra Components of GWT Material Framework
package gwt.material.design.addins.client.autocomplete;
/*
* #%L
* GwtMaterial
* %%
* Copyright (C) 2015 GwtMaterialDesign
* %%
* 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.
* #L%
*/
import com.google.gwt.dom.client.Document;
import com.google.gwt.event.dom.client.*;
import com.google.gwt.event.logical.shared.*;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.ui.*;
import com.google.gwt.user.client.ui.SuggestOracle.Suggestion;
import gwt.material.design.addins.client.MaterialAddins;
import gwt.material.design.addins.client.autocomplete.constants.AutocompleteType;
import gwt.material.design.client.MaterialDesignBase;
import gwt.material.design.client.base.*;
import gwt.material.design.client.base.mixin.CssTypeMixin;
import gwt.material.design.client.base.mixin.ErrorMixin;
import gwt.material.design.client.base.mixin.ProgressMixin;
import gwt.material.design.client.constants.IconType;
import gwt.material.design.client.constants.ProgressType;
import gwt.material.design.client.ui.MaterialChip;
import gwt.material.design.client.ui.MaterialLabel;
import gwt.material.design.client.ui.html.ListItem;
import gwt.material.design.client.ui.html.UnorderedList;
import java.util.*;
import java.util.Map.Entry;
//@formatter:off
/**
*
* Use GWT Autocomplete to search for matches from local or remote data sources.
* We used MultiWordSuggestOracle to populate the list to be added on the
* autocomplete values.
*
*
* XML Namespace Declaration
*
* {@code
* xmlns:ma='urn:import:gwt.material.design.addins.client'
* }
*
*
* UiBinder Usage:
*
* {@code
*
*
* Java Usage:
*
*
* To use your domain object inside the MaterialAutoComplete, for example, an object
* "User", you can subclass the {@link gwt.material.design.addins.client.autocomplete.base.MaterialSuggestionOracle} and {@link Suggestion}, like this:
*
*
* public class UserOracle extends MaterialSuggestionOracle {
* private List<User> contacts = new LinkedList<>();
*
* public void addContacts(List<User> users){
* contacts.addAll(users);
* }
*
* {@literal @}Override
* public void requestSuggestions(final Request request, final Callback callback) {
* Response resp = new Response();
* if (contacts.isEmpty()){
* callback.onSuggestionsReady(request, resp);
* return;
* }
* String text = request.getQuery();
* text = text.toLowerCase();
*
* List<UserSuggestion> list = new ArrayList<>();
*
* /{@literal *}
* {@literal *} Finds the contacts that meets the criteria. Note that since the
* {@literal *} requestSuggestions method is asynchronous, you can fetch the
* {@literal *} results from the server instead of using a local contacts List.
* {@literal *}/
* for (User contact : contacts){
* if (contact.getName().toLowerCase().contains(text)){
* list.add(new UserSuggestion(contact));
* }
* }
* resp.setSuggestions(list);
* callback.onSuggestionsReady(request, resp);
* }
* }
*
* public class UserSuggestion implements SuggestOracle.Suggestion {
*
* private User user;
*
* public UserSuggestion(User user){
* this.user = user;
* }
*
* {@literal @}Override
* public String getDisplayString() {
* return getReplacementString();
* }
*
* {@literal @}Override
* public String getReplacementString() {
* return user.getName();
* }
*
* public User getUser() {
* return user;
* }
* }
*
*
* And then use the UserOracle like this:
*
*
* //Constructor
* MaterialAutoComplete userAutoComplete = new MaterialAutoComplete(new UserOracle());
*
* //How to get the selected User objects
* public List<User> getSelectedUsers(){
* List<? extends Suggestion> values = userAutoComplete.getValue();
* List<User> users = new ArrayList<>(values.size());
* for (Suggestion value : values) {
* if (value instanceof UserSuggestion){
* UserSuggestion us = (UserSuggestion) value;
* User user = us.getUser();
* users.add(user);
* }
* }
* return users;
* }
*
*
* @author kevzlou7979
* @author gilberto-torrezan
* @see Material AutoComplete
*/
// @formatter:on
public class MaterialAutoComplete extends MaterialWidget implements HasError, HasPlaceholder,
HasValue>, HasProgress, HasKeyUpHandlers, HasType, HasSelectionHandlers {
static {
if(MaterialAddins.isDebug()) {
MaterialDesignBase.injectCss(MaterialAutocompleteDebugClientBundle.INSTANCE.autocompleteCssDebug());
} else {
MaterialDesignBase.injectCss(MaterialAutocompleteClientBundle.INSTANCE.autocompleteCss());
}
}
private Map suggestionMap = new LinkedHashMap<>();
private List itemsHighlighted = new ArrayList<>();
private FlowPanel panel = new FlowPanel();
private UnorderedList list = new UnorderedList();
private SuggestOracle suggestions;
private TextBox itemBox = new TextBox();
private SuggestBox box;
private int limit = 0;
private MaterialLabel lblError = new MaterialLabel();
private final ProgressMixin progressMixin = new ProgressMixin<>(this);
private String selectedChipStyle = "blue white-text";
private boolean directInputAllowed = true;
private MaterialChipProvider chipProvider = new DefaultMaterialChipProvider();
private final ErrorMixin errorMixin = new ErrorMixin<>(this,
lblError, list);
public final CssTypeMixin typeMixin = new CssTypeMixin<>(this);
/**
* Use MaterialAutocomplete to search for matches from local or remote data
* sources.
*/
public MaterialAutoComplete() {
super(Document.get().createDivElement());
add(panel);
}
public MaterialAutoComplete(AutocompleteType type) {
this();
setType(type);
}
/**
* Use MaterialAutocomplete to search for matches from local or remote data
* sources.
*
* @see #setSuggestions(SuggestOracle)
*/
public MaterialAutoComplete(SuggestOracle suggestions) {
this();
generateAutoComplete(suggestions);
}
/**
* Generate and build the List Items to be set on Auto Complete box.
*/
private void generateAutoComplete(SuggestOracle suggestions) {
list.setStyleName("multiValueSuggestBox-list");
this.suggestions = suggestions;
final ListItem item = new ListItem();
item.setStyleName("multiValueSuggestBox-input-token");
box = new SuggestBox(suggestions, itemBox);
setLimit(this.limit);
String autocompleteId = DOM.createUniqueId();
itemBox.getElement().setId(autocompleteId);
item.add(box);
list.add(item);
list.addDomHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
box.showSuggestionList();
}
}, ClickEvent.getType());
itemBox.addKeyDownHandler(new KeyDownHandler() {
public void onKeyDown(KeyDownEvent event) {
boolean itemsChanged = false;
switch (event.getNativeKeyCode()) {
case KeyCodes.KEY_ENTER:
if (directInputAllowed) {
String value = itemBox.getValue();
if (value != null && !(value = value.trim()).isEmpty()) {
gwt.material.design.client.base.Suggestion directInput = new gwt.material.design.client.base.Suggestion();
directInput.setDisplay(value);
directInput.setSuggestion(value);
itemsChanged = addItem(directInput);
itemBox.setValue("");
itemBox.setFocus(true);
}
}
break;
case KeyCodes.KEY_BACKSPACE:
if (itemBox.getValue().trim().isEmpty()) {
if (itemsHighlighted.isEmpty()) {
if (suggestionMap.size() > 0) {
ListItem li = (ListItem) list.getWidget(list.getWidgetCount() - 2);
MaterialChip p = (MaterialChip) li.getWidget(0);
boolean removable = true;
Set> entrySet = suggestionMap.entrySet();
for (Entry entry : entrySet) {
if (p.equals(entry.getValue())) {
if (chipProvider.isChipRemovable(entry.getKey())){
suggestionMap.remove(entry.getKey());
itemsChanged = true;
}
else {
removable = false;
}
break;
}
}
if (removable){
list.remove(li);
}
}
}
}
case KeyCodes.KEY_DELETE:
if (itemBox.getValue().trim().isEmpty()) {
for (ListItem li : itemsHighlighted) {
MaterialChip p = (MaterialChip) li.getWidget(0);
boolean removable = true;
Set> entrySet = suggestionMap.entrySet();
for (Entry entry : entrySet) {
if (p.equals(entry.getValue())) {
if (chipProvider.isChipRemovable(entry.getKey())){
suggestionMap.remove(entry.getKey());
itemsChanged = true;
}
else {
removable = false;
}
break;
}
}
if (removable){
li.removeFromParent();
}
}
itemsHighlighted.clear();
}
itemBox.setFocus(true);
break;
}
if (itemsChanged) {
ValueChangeEvent.fire(MaterialAutoComplete.this, getValue());
}
}
});
itemBox.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
box.showSuggestionList();
}
});
box.addSelectionHandler(new SelectionHandler() {
public void onSelection(SelectionEvent selectionEvent) {
Suggestion selectedItem = selectionEvent.getSelectedItem();
itemBox.setValue("");
if (addItem(selectedItem)) {
ValueChangeEvent.fire(MaterialAutoComplete.this, getValue());
}
itemBox.setFocus(true);
}
});
panel.add(list);
panel.getElement().setAttribute("onclick",
"document.getElementById('" + autocompleteId + "').focus()");
panel.add(lblError);
box.setFocus(true);
}
/**
* Adding the item value using Material Chips added on auto complete box
*/
protected boolean addItem(final Suggestion suggestion) {
SelectionEvent.fire(MaterialAutoComplete.this, suggestion);
if (getLimit() > 0) {
if (suggestionMap.size() >= getLimit()) {
return false;
}
}
if (suggestionMap.containsKey(suggestion)) {
return false;
}
final ListItem displayItem = new ListItem();
displayItem.setStyleName("multiValueSuggestBox-token");
if (getType() == AutocompleteType.TEXT){
suggestionMap.clear();
itemBox.setText(suggestion.getDisplayString());
displayItem.add(itemBox);
}
else {
final MaterialChip chip = chipProvider.getChip(suggestion);
if (chip == null) {
return false;
}
chip.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent clickEvent) {
if (chipProvider.isChipSelectable(suggestion)){
if (itemsHighlighted.contains(displayItem)) {
chip.removeStyleName(selectedChipStyle);
itemsHighlighted.remove(displayItem);
} else {
chip.addStyleName(selectedChipStyle);
itemsHighlighted.add(displayItem);
}
}
}
});
if (chip.getIcon() != null){
chip.getIcon().addClickHandler(new ClickHandler() {
public void onClick(ClickEvent clickEvent) {
if (chipProvider.isChipRemovable(suggestion)){
suggestionMap.remove(suggestion);
list.remove(displayItem);
itemsHighlighted.remove(displayItem);
ValueChangeEvent.fire(MaterialAutoComplete.this, getValue());
box.showSuggestionList();
}
}
});
}
suggestionMap.put(suggestion, chip);
displayItem.add(chip);
}
list.insert(displayItem, list.getWidgetCount() - 1);
return true;
}
/**
* Clear the chip items on the autocomplete box
*/
public void clear() {
itemBox.setValue("");
Collection values = suggestionMap.values();
for (Widget widget : values) {
Widget parent = widget.getParent();
if (parent instanceof ListItem) {
parent.removeFromParent();
}
}
suggestionMap.clear();
clearErrorOrSuccess();
}
/**
* @return the item values on autocomplete
* @see #getValue()
*/
public List getItemValues() {
Set keySet = suggestionMap.keySet();
List values = new ArrayList<>(keySet.size());
for (Suggestion suggestion : keySet) {
values.add(suggestion.getReplacementString());
}
return values;
}
/**
* @param itemValues
* the itemsSelected to set
* @see #setValue(List)
*/
public void setItemValues(List itemValues) {
if (itemValues == null) {
clear();
return;
}
List list = new ArrayList<>(itemValues.size());
for (String value : itemValues) {
Suggestion suggestion = new gwt.material.design.client.base.Suggestion(value, value);
list.add(suggestion);
}
setValue(list);
}
/**
* @return the itemsHighlighted
*/
public List getItemsHighlighted() {
return itemsHighlighted;
}
/**
* @param itemsHighlighted
* the itemsHighlighted to set
*/
public void setItemsHighlighted(List itemsHighlighted) {
this.itemsHighlighted = itemsHighlighted;
}
/**
* @return the suggestion oracle
*/
public SuggestOracle getSuggestions() {
return suggestions;
}
/**
* Sets the SuggestOracle to be used to provide suggestions. Also setups the
* component with the needed event handlers and UI elements.
*
* @param suggestions
* the suggestion oracle to set
*/
public void setSuggestions(SuggestOracle suggestions) {
this.suggestions = suggestions;
generateAutoComplete(suggestions);
}
public void setSuggestions(SuggestOracle suggestions, AutocompleteType type) {
setType(type);
setSuggestions(suggestions);
}
public int getLimit() {
return limit;
}
public void setLimit(int limit) {
this.limit = limit;
if (this.box != null) {
this.box.setLimit(limit);
}
}
@Override
public String getPlaceholder() {
return itemBox.getElement().getAttribute("placeholder");
}
@Override
public void setPlaceholder(String placeholder) {
itemBox.getElement().setAttribute("placeholder", placeholder);
}
@Override
public void setError(String error) {
errorMixin.setError(error);
}
@Override
public void setSuccess(String success) {
errorMixin.setSuccess(success);
}
@Override
public void clearErrorOrSuccess() {
errorMixin.clearErrorOrSuccess();
}
/**
* Gets the current {@link MaterialChipProvider}. By default, the class uses
* an instance of {@link DefaultMaterialChipProvider}.
*/
public MaterialChipProvider getChipProvider() {
return chipProvider;
}
/**
* Sets a {@link MaterialChipProvider} that can customize how the
* {@link MaterialChip} is created for each selected {@link Suggestion}.
*/
public void setChipProvider(MaterialChipProvider chipProvider) {
this.chipProvider = chipProvider;
}
/**
* When set to false, only {@link Suggestion}s from the
* SuggestionOracle are accepted. Direct input create by the user is
* ignored. By default, direct input is allowed.
*/
public void setDirectInputAllowed(boolean directInputAllowed) {
this.directInputAllowed = directInputAllowed;
}
/**
* @return if {@link Suggestion}s created by direct input from the user
* should be allowed. By default directInputAllowed is
* true.
*/
public boolean isDirectInputAllowed() {
return directInputAllowed;
}
/**
* Sets the style class applied to chips when they are selected.
*
* Defaults to "blue white-text".
*
*
* @param selectedChipStyle
* The class or classes to be applied to selected chips
*/
public void setSelectedChipStyle(String selectedChipStyle) {
this.selectedChipStyle = selectedChipStyle;
}
/**
* Returns the style class applied to chips when they are selected.
*
* Defaults to "blue white-text".
*
*/
public String getSelectedChipStyle() {
return selectedChipStyle;
}
@Override
public void showProgress(ProgressType type) {
progressMixin.showProgress(ProgressType.INDETERMINATE);
}
@Override
public void setPercent(double percent) {
progressMixin.setPercent(percent);
}
@Override
public void hideProgress() {
progressMixin.hideProgress();
}
@Override
public HandlerRegistration addKeyUpHandler(final KeyUpHandler handler) {
return itemBox.addKeyUpHandler(new KeyUpHandler() {
@Override
public void onKeyUp(KeyUpEvent event) {
if(isEnabled()){
handler.onKeyUp(event);
}
}
});
}
@Override
public void setType(AutocompleteType type) {
typeMixin.setType(type);
}
@Override
public AutocompleteType getType() {
return typeMixin.getType();
}
@Override
public HandlerRegistration addSelectionHandler(final SelectionHandler handler) {
return addHandler(new SelectionHandler() {
@Override
public void onSelection(SelectionEvent event) {
if(isEnabled()){
handler.onSelection(event);
}
}
}, SelectionEvent.getType());
}
/**
* Interface that defines how a {@link MaterialChip} is created, given a
* {@link Suggestion}.
*
* @see gwt.material.design.addins.client.autocomplete.MaterialAutoComplete#setChipProvider(MaterialChipProvider)
*/
public static interface MaterialChipProvider {
/**
* Creates and returns a {@link MaterialChip} based on the selected
* {@link Suggestion}.
*
* @param suggestion
* the selected {@link Suggestion}
*
* @return the created MaterialChip, or null if the
* suggestion should be ignored.
*/
MaterialChip getChip(Suggestion suggestion);
/**
* Returns whether the chip defined by the suggestion should be selected when the user clicks on it.
*
*
* Selecion of chips is used to batch remove suggestions, for example.
*
*
* @param suggestion
* the selected {@link Suggestion}
*
* @see MaterialAutoComplete#setSelectedChipStyle(String)
*/
boolean isChipSelectable(Suggestion suggestion);
/**
* Returns whether the chip defined by the suggestion should be removed from the autocomplete when clicked on its icon.
*
*
* Override this method returning false to implement your own logic when the user clicks on the chip icon.
*
*
* @param suggestion
* the selected {@link Suggestion}
*/
boolean isChipRemovable(Suggestion suggestion);
}
/**
* Default implementation of the {@link MaterialChipProvider} interface,
* used by the {@link gwt.material.design.addins.client.autocomplete.MaterialAutoComplete}.
*
*
* By default all chips are selectable and removable. The default {@link IconType} used by the chips provided is the {@link IconType#CLOSE}.
*
*
* @see gwt.material.design.addins.client.autocomplete.MaterialAutoComplete#setChipProvider(MaterialChipProvider)
*/
public static class DefaultMaterialChipProvider implements MaterialChipProvider {
@Override
public MaterialChip getChip(Suggestion suggestion) {
final MaterialChip chip = new MaterialChip();
String imageChip = suggestion.getDisplayString();
String textChip = imageChip;
String s = "![](\"";)
]*[>]", "");
}
chip.setText(textChip);
chip.setIconType(IconType.CLOSE);
return chip;
}
@Override
public boolean isChipRemovable(Suggestion suggestion) {
return true;
}
@Override
public boolean isChipSelectable(Suggestion suggestion) {
return true;
}
}
@Override
public HandlerRegistration addValueChangeHandler(final ValueChangeHandler> handler) {
return addHandler(new ValueChangeHandler>() {
@Override
public void onValueChange(ValueChangeEvent> event) {
if(isEnabled()){
handler.onValueChange(event);
}
}
}, ValueChangeEvent.getType());
}
/**
* Returns the selected {@link Suggestion}s. Modifications to the list are
* not propagated to the component.
*
* @return the list of selected {@link Suggestion}s, or empty if none was
* selected (never null).
*/
@Override
public List getValue() {
return new ArrayList<>(suggestionMap.keySet());
}
@Override
public void setValue(List value) {
setValue(value, false);
}
@Override
public void setValue(List value, boolean fireEvents) {
clear();
if (value != null) {
for (Suggestion suggestion : value) {
addItem(suggestion);
}
}
if (fireEvents) {
ValueChangeEvent.fire(this, getValue());
}
}
}
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