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GWT Bibliothek fuer Mobile Plattformen der SWM
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/*
* Copyright 2011 SWM Services GmbH.
*
* 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.
*/
package de.swm.commons.mobile.client.widgets;
import com.google.gwt.dom.client.Element;
import com.google.gwt.event.dom.client.*;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.*;
import com.google.gwt.user.client.ui.TextBox;
import de.swm.commons.mobile.client.SWMMobile;
import de.swm.commons.mobile.client.event.DragController;
import de.swm.commons.mobile.client.event.DragEvent;
import de.swm.commons.mobile.client.event.DragEventsHandler;
import de.swm.commons.mobile.client.theme.components.SearchBoxCss;
import de.swm.commons.mobile.client.widgets.itf.IHasPlaceHolder;
/**
* A search widget
*/
public class SearchBox extends Composite implements HasChangeHandlers, HasText,
HasName, HasValue, IHasPlaceHolder, HasAllKeyHandlers, HasEnabled,
HasAllFocusHandlers {
/**
* The radius that a finger can move before the touch is not considered a
* simple touch anymore
*/
public static final int RADIUS = 10;
private final TextBox box;
private ClearButton clearButton;
private ClearButtonTouchHandler clearButtonHandler;
private HandlerRegistration boxHandler;
private final FlowPanel roundDiv;
protected final SearchBoxCss css;
/**
* Construct a search box
*/
public SearchBox() {
this(SWMMobile.getTheme().getMGWTCssBundle().getSearchBoxCss());
}
/**
* Construct a search box with a given css
*
* @param css the css to use
*/
public SearchBox(SearchBoxCss css) {
this.css = css;
this.css.ensureInjected();
FlowPanel main = new FlowPanel();
main.addStyleName(css.searchBox());
initWidget(main);
roundDiv = new FlowPanel();
roundDiv.addStyleName(css.round());
main.add(roundDiv);
box = new TextBox();
box.addStyleName(css.input());
box.getElement().setAttribute("autocapitalize", "off");
box.getElement().setAttribute("autocorrect", "off");
if (!SWMMobile.getOsDetection().isDesktop()) {
box.getElement().setAttribute("type", "search");
}
roundDiv.add(box);
if (!SWMMobile.getOsDetection().isDesktop()) {
clearButton = new ClearButton();
clearButton.addStyleName(css.clear());
}
setPlaceHolder("Search");
}
/**
* {@inheritDoc}
*/
@Override
protected void onAttach() {
super.onAttach();
if (!SWMMobile.getOsDetection().isDesktop()) {
clearButtonHandler = new ClearButtonTouchHandler(clearButton);
DragController.get().addDragEventsHandler(clearButtonHandler);
}
boxHandler = box.addKeyUpHandler(new SearchBoxChangeHandler());
}
/**
* {@inheritDoc}
*/
@Override
protected void onDetach() {
super.onDetach();
if (!SWMMobile.getOsDetection().isDesktop()) {
DragController.get().removeDragEventsHandler(clearButtonHandler);
}
boxHandler.removeHandler();
}
/**
* Returns true if the widget is enabled, false if not.
*/
@Override
public boolean isEnabled() {
return box.isEnabled();
}
/**
* Will set the focus of the search box.
* @param focused true if focused
*/
public void setFocus(boolean focused){
box.setFocus(focused);
}
/**
* Sets whether this widget is enabled.
*
* @param enabled true to enable the widget, false
* to disable it
*/
public void setEnabled(boolean enabled) {
this.box.setEnabled(enabled);
}
/**
* {@inheritDoc}
*/
public void setPlaceHolder(String text) {
box.getElement().setAttribute("placeholder", text);
}
/**
* Clear handler for the clear button.
*
* @param cl the clear button
*/
public void addClearButtonHandler(ClickHandler cl) {
if (clearButton != null && !SWMMobile.getOsDetection().isDesktop()) {
this.clearButton.addClickHandler(cl);
}
}
private void clearSearchField() {
box.setValue("");
if (clearButton != null && !SWMMobile.getOsDetection().isDesktop()) {
roundDiv.remove(clearButton);
}
}
/**
*
* getPlaceHolder
*
*
* @return a {@link java.lang.String} object.
*/
public String getPlaceHolder() {
return box.getElement().getAttribute("placeholder");
}
/**
*
* getText
*
*
* @return a {@link java.lang.String} object.
*/
public String getText() {
return box.getText();
}
/**
* {@inheritDoc}
*/
public void setText(String text) {
box.setText(text);
}
/**
* {@inheritDoc}
*/
public HandlerRegistration addValueChangeHandler(
ValueChangeHandler stringValueChangeHandler) {
return box.addValueChangeHandler(stringValueChangeHandler);
}
/**
* {@inheritDoc}
*/
public void setName(String name) {
box.setName(name);
}
/**
*
* getName
*
*
* @return a {@link java.lang.String} object.
*/
public String getName() {
return box.getName();
}
/**
* {@inheritDoc}
*/
public com.google.gwt.event.shared.HandlerRegistration addChangeHandler(
ChangeHandler handler) {
return box.addChangeHandler(handler);
}
/**
*
* getKey
*
*
* @return a {@link java.lang.String} object.
*/
public String getValue() {
return box.getValue();
}
/**
*
* setKey
*
*
* @param value a {@link java.lang.String} object.
*/
public void setValue(String value) {
box.setValue(value);
}
/**
* {@inheritDoc}
*/
public void setValue(String value, boolean fireEvents) {
box.setValue(value, fireEvents);
}
/**
* {@inheritDoc}
*/
@Override
public HandlerRegistration addKeyUpHandler(KeyUpHandler handler) {
return box.addKeyUpHandler(handler);
}
/**
* {@inheritDoc}
*/
@Override
public HandlerRegistration addKeyDownHandler(KeyDownHandler handler) {
return box.addKeyDownHandler(handler);
}
/**
* {@inheritDoc}
*/
@Override
public HandlerRegistration addKeyPressHandler(KeyPressHandler handler) {
return box.addKeyPressHandler(handler);
}
@Override
public HandlerRegistration addFocusHandler(FocusHandler handler) {
return box.addFocusHandler(handler);
}
@Override
public HandlerRegistration addBlurHandler(BlurHandler handler) {
return box.addBlurHandler(handler);
}
private class SearchBoxChangeHandler implements KeyUpHandler {
@Override
public void onKeyUp(KeyUpEvent event) {
if (!SWMMobile.getOsDetection().isDesktop()) {
if (box.getValue().length() > 0) {
if (clearButton != null && !SWMMobile.getOsDetection().isDesktop()) {
roundDiv.add(clearButton);
}
} else {
if (clearButton != null && !SWMMobile.getOsDetection().isDesktop()) {
roundDiv.remove(clearButton);
}
}
}
}
}
private class ClearButtonTouchHandler implements DragEventsHandler {
private boolean moved;
private double x;
private double y;
private final ClearButton clearButton;
public ClearButtonTouchHandler(ClearButton clearButton) {
this.clearButton = clearButton;
}
@Override
public void onDragStart(DragEvent event) {
if (clearButton != null && !SWMMobile.getOsDetection().isDesktop()) {
clearButton.addStyleName(css.clearActive());
}
moved = false;
x = event.getOffsetX();
y = event.getOffsetY();
event.stopPropagation();
}
@Override
public void onDragMove(DragEvent event) {
if (Math.abs(event.getOffsetX() - x) > RADIUS
|| Math.abs(event.getOffsetY() - y) > RADIUS) {
moved = true;
if (clearButton != null && !SWMMobile.getOsDetection().isDesktop()) {
clearButton.removeStyleName(css.clearActive());
}
}
event.stopPropagation();
}
@Override
public void onDragEnd(DragEvent event) {
if (clearButton != null && !SWMMobile.getOsDetection().isDesktop()) {
clearButton.removeStyleName(css.clearActive());
}
if (!moved) {
clearSearchField();
}
event.stopPropagation();
}
@Override
public Element getElement() {
return clearButton.getElement();
}
}
public static class ClearButton extends HTML {
public ClearButton() {
super("");
}
}
}