package com.sksamuel.jqm4gwt;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.event.shared.EventHandler;
import com.google.gwt.event.shared.GwtEvent.Type;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HasEnabled;
import com.google.gwt.user.client.ui.Widget;
import com.sksamuel.jqm4gwt.JQMContext.WidgetDefaults;
import com.sksamuel.jqm4gwt.events.HasJQMEventHandlers;
import com.sksamuel.jqm4gwt.events.JQMEventFactory;
import com.sksamuel.jqm4gwt.events.JQMHandlerRegistration;
import com.sksamuel.jqm4gwt.events.JQMHandlerRegistration.WidgetHandlerCounter;
import com.sksamuel.jqm4gwt.form.elements.JQMFilterable;
import com.sksamuel.jqm4gwt.form.elements.JQMFilterableEvent;
import com.sksamuel.jqm4gwt.form.elements.JQMSelect;
import com.sksamuel.jqm4gwt.layout.JQMCollapsibleSet;
import com.sksamuel.jqm4gwt.list.JQMList;
/**
* @author Stephen K Samuel samspade79@gmail.com 11 Jul 2011 17:02:40
* <br>
* An extension of the standard GWT {@link Widget} that adds
* functionality common to all JQM elements, as well as convenience
* methods used by subclasses.
* <br>
* The {@link JQMWidget} is an extension of composite because
* {@link JQMWidget}s do not typically add new functionality (in terms
* of new elements), they are mostly compositions of existing HTML
* elements.
* <br>
* This abstract superclass does not define the nature of the
* composition in use. Implementating subclasses must decide how to
* compose and thus call initWidget() themselves.
*/
public abstract class JQMWidget extends Composite implements HasTheme<JQMWidget>, HasId<JQMWidget>,
HasDataRole, HasEnabled, HasJQMEventHandlers, HasFilterable {
private boolean boundFilterEvents;
private boolean boundFilterCallback;
private boolean boundFilterCreate;
private JavaScriptObject origFilter;
public JQMWidget() {
}
/**
* Returns the value of the attribute with the given name
*/
public String getAttribute(String name) {
return JQMCommon.getAttribute(this, name);
}
public boolean getAttributeBoolean(String name) {
return "true".equalsIgnoreCase(getAttribute(name));
}
@Override
public String getDataRole() {
return JQMCommon.getDataRole(this);
}
/**
* Removes the attribute with the given name
*
* @param name the name of the attribute to remove
*/
protected void removeAttribute(String name) {
getElement().removeAttribute(name);
}
public void removeDataRole() {
JQMCommon.removeDataRole(this);
}
/**
* Sets the value of the attribute with the given name to the given value.
*/
public void setAttribute(String name, String value) {
JQMCommon.setAttribute(this, name, value);
}
/**
* Sets the data-role attribute to the given value.
*
* @param value the value to set the data-role attribute to
*/
@Override
public void setDataRole(String value) {
JQMCommon.setDataRole(this, value);
}
/** Returns this widget's ID (set on the main element) */
@Override
public final String getId() {
return getElement().getId();
}
/** The same as {@link JQMWidget#getId()}, but needed for UiBinder templates */
public final String getWidgetId() {
return getId();
}
/**
* Assigns an automatically generated ID to this widget. This method uses
* the default GWT id creation methods in Document.get().createUniqueId()
*/
protected final void setId() {
setId(Document.get().createUniqueId());
}
@Override
public final void setId(String id) {
getElement().setId(id);
}
/**
* The same as {@link JQMWidget#setId(String)}, but needed for UiBinder templates
* where setId() cannot be used, because id="xxx" has different predefined meaning.
*/
public final void setWidgetId(String id) {
setId(id);
}
@Override
public final JQMWidget withId(String id) {
setId(id);
return this;
}
@Override
public String getTheme() {
return JQMCommon.getTheme(this);
}
@Override
public void setTheme(String themeName) {
JQMCommon.setTheme(this, themeName);
}
/**
* Sets new theme only in case if currently no theme is defined for this widget.
*/
public void setThemeIfCurrentEmpty(String themeName) {
if (themeName == null || themeName.isEmpty()) return;
String theme = getTheme();
if (theme == null || theme.isEmpty()) {
setTheme(themeName);
}
}
@Override
public JQMWidget withTheme(String themeName) {
setTheme(themeName);
return this;
}
@Override
public void setEnabled(boolean b) {
JQMCommon.setEnabled(this, b);
}
@Override
public boolean isEnabled() {
return JQMCommon.isEnabled(this);
}
@Override
public boolean isVisible() {
return super.isVisible() && JQMCommon.isVisible(this);
}
@Override
public HandlerRegistration addJQMEventHandler(String jqmEventName, EventHandler handler) {
Type<EventHandler> t = JQMEventFactory.getType(jqmEventName, EventHandler.class);
return JQMHandlerRegistration.registerJQueryHandler(new WidgetHandlerCounter() {
@Override
public int getHandlerCountForWidget(Type<?> type) {
return getHandlerCount(type);
}
}, this, handler, jqmEventName, t);
}
public String getFilterText() {
return JQMCommon.getFilterText(getDataFilterWidget());
}
/**
* {@link JQMFilterable} will use this text when searching through this widget.
* <br><b>Detail description:</b> By default, the filter simply searches against
* the contents of each list item.
* If you want the filter to search against different content, add the data-filtertext
* attribute to the item and populate it with one or many keywords and phrases that
* should be used to match against. Note that if this attribute is added,
* the contents of the list item are ignored.
* <p> This attribute is useful for dealing with allowing for ticker symbols
* and full company names to be searched, or for covering common spellings
* and abbreviations for countries.
*/
public void setFilterText(String filterText) {
JQMCommon.setFilterText(getDataFilterWidget(), filterText);
}
/** Can be overridden in descendants to provide proper data filter widget */
protected Widget getDataFilterWidget() {
return this;
}
/** @return true if this list is set to filterable, false otherwise. */
public boolean isFilterable() {
return JQMCommon.isFilterable(getDataFilterWidget());
}
public void setFilterable(boolean value) {
JQMCommon.setFilterable(getDataFilterWidget(), value);
checkFilterEvents();
}
public String getDataFilter() {
return JQMCommon.getDataFilter(getDataFilterWidget());
}
/**
* To be used in conjunction with {@link JQMFilterable}.
* <br> May not work for any widget or require {@link JQMWidget#getDataFilterWidget()} override
* for composite widgets like {@link JQMSelect}.
* <br> But {@link JQMList}, {@link JQMCollapsibleSet}, and others with children collection are supported.
*
* @param filterSelector - a jQuery selector that will be used to retrieve the element
* that will serve as the input source, UiBinder example: dataFilter="#{fltr1.getFilterId}"
*/
public void setDataFilter(String filterSelector) {
JQMCommon.setDataFilter(getDataFilterWidget(), filterSelector);
checkFilterEvents();
}
/**
* @return - associated JQMFilterable.filter.getElement()
*/
protected Element getFilterSearchElt() {
String s = getDataFilter();
if (s == null || s.isEmpty()) return null;
return findElt(s);
}
protected static native Element findElt(String selector) /*-{
return $wnd.$( selector ).first()[0];
}-*/;
public String getFilterSearchText() {
Element elt = getFilterSearchElt();
if (elt == null) return null;
return JQMCommon.getAttribute(elt, "data-lastval");
}
/**
* Complimentary to setDataFilter(). Sets filter search text of associated JQMFilterable widget.
*/
public void setFilterSearchText(String value) {
Element elt = getFilterSearchElt();
if (elt == null) return;
refreshFilterSearch(elt, value);
}
protected static native void refreshFilterSearch(Element elt, String text) /*-{
$wnd.$(elt).val(text).attr('data-lastval', '').trigger('change');
}-*/;
public String getFilterChildren() {
return JQMCommon.getFilterChildren(getDataFilterWidget());
}
/**
* See <a href="http://api.jquerymobile.com/filterable/#option-children">Filterable Children</a>
*/
public void setFilterChildren(String filterChildren) {
JQMCommon.setFilterChildren(getDataFilterWidget(), filterChildren);
}
public boolean isFilterReveal() {
return JQMCommon.isFilterReveal(getDataFilterWidget());
}
public void setFilterReveal(boolean value) {
JQMCommon.setFilterReveal(getDataFilterWidget(), value);
}
@Override
public void refreshFilter() {
if (isFilterable()) JQMCommon.refreshFilter(getDataFilterWidget());
}
/** @param filter - currently entered filter text */
protected void onBeforeFilter(String filter) {
}
@Override
public void doBeforeFilter(String filter) {
onBeforeFilter(filter);
JQMFilterableEvent.fire(this, JQMFilterableEvent.FilterableState.BEFORE_FILTER, filter);
}
public HandlerRegistration addFilterableHandler(JQMFilterableEvent.Handler handler) {
return addHandler(handler, JQMFilterableEvent.getType());
}
private void bindFilterEvents() {
if (boundFilterEvents) return;
JQMCommon.bindFilterEvents(this, getDataFilterWidget().getElement());
boundFilterEvents = true;
}
private void unbindFilterEvents() {
if (!boundFilterEvents) return;
JQMCommon.unbindFilterEvents(getDataFilterWidget().getElement());
boundFilterEvents = false;
}
/**
* @param elt - current filtering element, JQMCommon.getTextForFiltering(elt) can be used to get filtering text
* @param index - filtering element's index
* @param searchValue - filtering text
*
* @return - must return <b>true</b> if the element is to be <b>filtered out</b>.
* <br> - must return <b>false</b> if the element is to be <b>shown</b>.
* <br> - null means default filtering should be used.
* <br> JQMCommon.getTextForFiltering(elt) can be used to get filtering element's text
*/
protected Boolean onFiltering(Element elt, Integer index, String searchValue) {
//String s = JQMCommon.getTextForFiltering(elt);
return null;
}
@Override
public Boolean doFiltering(Element elt, Integer index, String searchValue) {
Boolean rslt = onFiltering(elt, index, searchValue);
Boolean eventRslt = JQMFilterableEvent.fire(this, JQMFilterableEvent.FilterableState.FILTERING,
searchValue, elt, index);
// return the worst (from "filter out" to "default filtering") result
if (rslt != null && rslt || eventRslt != null && eventRslt) return true;
if (rslt != null) return rslt;
if (eventRslt != null) return eventRslt;
return null;
}
private void bindFilterCallback() {
if (boundFilterCallback) return;
Element elt = getDataFilterWidget().getElement();
origFilter = JQMCommon.getFilterCallback(elt);
JQMCommon.bindFilterCallback(this, elt, origFilter);
boundFilterCallback = true;
}
private void unbindFilterCallback() {
if (!boundFilterCallback) return;
JQMCommon.unbindFilterCallback(getDataFilterWidget().getElement(), origFilter);
origFilter = null;
boundFilterCallback = false;
}
private void checkFilterEvents() {
if (isAttached()) {
boolean b = isFilterable();
if (!b) {
unbindFilterEvents();
unbindFilterCallback();
} else {
bindFilterEvents();
bindFilterableCreated();
}
}
}
private void bindFilterableCreated() {
if (boundFilterCreate) return;
bindFilterableCreated(getDataFilterWidget().getElement(), this);
boundFilterCreate = true;
}
private void unbindFilterableCreated() {
if (!boundFilterCreate) return;
unbindFilterableCreated(getDataFilterWidget().getElement());
boundFilterCreate = false;
}
private static native void bindFilterableCreated(Element elt, JQMWidget w) /*-{
$wnd.$(elt).on( 'filterablecreate', function( event, ui ) {
w.@com.sksamuel.jqm4gwt.JQMWidget::filterableCreated()();
});
}-*/;
private static native void unbindFilterableCreated(Element elt) /*-{
$wnd.$(elt).off( 'filterablecreate' );
}-*/;
private void filterableCreated() {
bindFilterCallback();
}
@Override
protected void onLoad() {
super.onLoad();
WidgetDefaults dflt = JQMContext.getWidgetDefaults();
if (dflt != null) dflt.loaded(this);
checkFilterEvents();
}
@Override
protected void onUnload() {
unbindFilterEvents();
unbindFilterCallback();
unbindFilterableCreated();
super.onUnload();
}
}