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GWT Bibliothek fuer Mobile Plattformen der SWM
/*
* 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.utils;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.EventTarget;
import com.google.gwt.dom.client.Style;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.EventListener;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.Anchor;
import com.google.gwt.user.client.ui.RootPanel;
import de.swm.commons.mobile.client.SWMMobile;
import de.swm.commons.mobile.client.setup.OsDetection;
import de.swm.gwt.client.exception.ApplicationRedirecter;
import java.util.logging.Logger;
/**
* Utility, to e.g. write to the browser's console.
*/
public class Utils {
private static final Logger LOGGER = Logger.getLogger(Utils.class.getName());
private static final double HVGA_PIXEL_RATIO = 1.5;
private static final String FORM_CONTROLLS = "BUTTON INPUT SELECT TEXTAREA";
/**
* Writes a debug message to the browser's console.
*
* @param msg message to be written
*/
public static void console(String msg) {
LOGGER.info(msg);
}
/**
* Fuhrt ein Redirect der url durch.
*
* @param url die Zielurl
*/
public static void redirect(final String url) {
ApplicationRedirecter.redirect(url);
}
/**
* Removes the Title bar on Adroid
*/
public static native void removeTitleBar() /*-{
$wnd.scrollTo(0, 1);
}-*/;
/**
* A utility method to hide the soft keyboard
*/
public static void hideKeyBoard() {
final Anchor anchor = new Anchor(" ");
anchor.getElement().getStyle().setWidth(1, Style.Unit.PX);
anchor.getElement().getStyle().setHeight(1, Style.Unit.PX);
anchor.getElement().getStyle().setDisplay(Style.Display.INLINE);
anchor.getElement().getStyle().setFloat(Style.Float.LEFT);
RootPanel.get().add(anchor);
anchor.setFocus(true);
Scheduler.get().scheduleDeferred(new Scheduler.ScheduledCommand() {
@Override
public void execute() {
anchor.removeFromParent();
}
});
}
/**
* Will re-redner a screen on android.
*/
public static void forceFullRepaint() {
OsDetection d = SWMMobile.getOsDetection();
if (d.isAndroid()) {
final String zIndex = Document.get().getBody().getStyle().getZIndex();
Document.get().getBody().getStyle().setZIndex(-1);
new Timer() {
@Override
public void run() {
Document.get().getBody().getStyle().setProperty("zIndex", zIndex);
}
}.schedule(50);
}
}
/**
* Wtirts to the native log window.
*
* @param msg the message to write.
*/
private static native void consoleLogNative(String msg) /*-{
var log = $doc.getElementById('log');
if (log) {
log.innerHTML = msg + '
' + log.innerHTML;
} else {
if ($wnd.console) {
$wnd.console.log(msg);
}
}
}-*/;
/**
* Adds an event listener to an HTML element.
*
* @param ele the element
* @param event the event
* @param capture .
* @param listener the listener to add
* @return the java script object
*/
public static native JavaScriptObject addEventListener(Element ele, String event, boolean capture,
EventListener listener) /*-{
var callBack = function (e) {
[email protected]::onBrowserEvent(Lcom/google/gwt/user/client/Event;)(e);
};
ele.addEventListener(event, callBack, capture);
return callBack;
}-*/;
/**
* Removes (if exiting) and adds an event listener to an HTML element.
*
* @param ele the element
* @param event the event
* @param capture .
* @param listener the listener to add
*/
public static native void addEventListenerOnce(Element ele, String event, boolean capture, EventListener listener) /*-{
var callBack = function (e) {
ele.removeEventListener(event, callBack, capture);
[email protected]::onBrowserEvent(Lcom/google/gwt/user/client/Event;)(e);
};
ele.addEventListener(event, callBack, capture);
}-*/;
/**
* Removes an event listener form an HTML element.
*
* @param ele the element
* @param event the event
* @param capture .
* @param callBack call back if removed
*/
public static native void removeEventListener(Element ele, String event, boolean capture, JavaScriptObject callBack) /*-{
ele.removeEventListener(event, callBack, capture);
}-*/;
private static Element htmlNode = DOM.createElement("DIV");
/**
* Returns true if the passed HTML element is a Form element.
*
* @param ele the html element
* @return true if form control
*/
public static boolean isHtmlFormControl(Element ele) {
if (ele == null) {
return false;
}
String nodeName = ele.getNodeName().toUpperCase();
String roleName = ele.getAttribute("role").toUpperCase();
return FORM_CONTROLLS.contains(nodeName) || roleName.length() > 0 && FORM_CONTROLLS.contains(roleName)
|| isHtmlFormControl(ele.getParentElement());
}
/**
* Retunns the current active HTML Element.
*
* @return the html element
*/
public static native Element getActiveElement() /*-{
return $doc.activeElement;
}-*/;
/**
* Bestimmt ob es sich um eine WVGA ausloesung handelt.
*
* @return true wenn WVGA ausloesung
*/
public static boolean isWVGA() {
int ratio = getDevicePixelRatio();
return ratio == HVGA_PIXEL_RATIO;
}
/**
* Returns the device pixel ratio.
*
* @return the device pixel ratio.
*/
public static native int getDevicePixelRatio() /*-{
if (typeof $wnd.devicePixelRatio != 'undefined') {
return $wnd.devicePixelRatio;
} else {
return 1;
}
}-*/;
/**
* Moves an element on x-axis.
*
* @param ele the element.
* @param value the value in px
*/
public static native void setTranslateX(Element ele, double value) /*-{
if (typeof ele.style.webkitTransform != 'undefined') {
ele.style.webkitTransform = "translate3d(" + value + "px, 0px, 0px)";
} else {
if (typeof ele.style.transform != 'undefined') {
ele.style.transform = "translate3d(" + value + "px, 0px, 0px)";
}
}
}-*/;
/**
* Returns the x position of an element.
*
* @param ele the element
* @return the position
*/
public static native int getTranslateX(Element ele) /*-{
var transform;
var translateX = 0;
if (typeof ele.style.webkitTransform != 'undefined') {
transform = ele.style.webkitTransform;
} else {
if (typeof ele.style.transform != 'undefined') {
transform = ele.style.transform;
}
}
if (transform && transform !== "") {
translateX = parseInt((/translate3d\((\-?.*)px, 0px, 0px\)/).exec(transform)[1]);
}
return translateX;
}-*/;
/**
* Moves an element on y-axis.
*
* @param ele the element.
* @param value the value in px
*/
public static native void setTranslateY(Element ele, double value) /*-{
if (typeof ele.style.webkitTransform != 'undefined') {
ele.style.webkitTransform = "translate3d(0px, " + value + "px ,0px)";
} else {
if (typeof ele.style.transform != 'undefined') {
ele.style.transform = "translate3d(0px, " + value + "px ,0px)";
}
}
}-*/;
/**
* Returns the y position of an element.
*
* @param ele the element
* @return the position
*/
public static native int getTranslateY(Element ele) /*-{
var transform;
var translateY = 0;
if (typeof ele.style.webkitTransform != 'undefined') {
transform = ele.style.webkitTransform;
} else {
if (typeof ele.style.transform != 'undefined') {
transform = ele.style.transform;
}
}
if (transform && transform !== "") {
translateY = parseInt((/translate3d\(0px, (\-?.*)px, 0px\)/).exec(transform)[1]);
}
return translateY;
}-*/;
/**
* Returns the sixth 2D vector value. WebKitCSSMatrix objects represent a 4x4 homogeneous matrix for 3D transforms
* or a vector for 2D transforms. You can use these objects to manipulate matrices in JavaScript. For example, you
* can multiply, translate, and scale matrices.
*
* @param ele the element.
* @return the value
*/
public static native int getMatrixY(Element ele) /*-{
var matrix;
if (typeof window.getComputedStyle(ele).webkitTransform != 'undefined') {
matrix = new WebKitCSSMatrix(window.getComputedStyle(ele).webkitTransform);
} else {
if (typeof window.getComputedStyle(ele).transform != 'undefined') {
matrix = new MSCSSMatrix(window.getComputedStyle(ele).transform);
}
}
return matrix.f;
}-*/;
/**
* Sets a duration of an Transition.
*
* @param ele the element.
* @param value the value
*/
public static native void setTransitionDuration(Element ele, double value) /*-{
if (typeof ele.style.webkitTransitionDuration != 'undefined') {
ele.style.webkitTransitionDuration = "" + value + "ms";
} else {
if (typeof ele.style.transitionDuration != 'undefined') {
ele.style.transitionDuration = "" + value + "ms";
}
}
}-*/;
public static native String getTransitionEventName(Element ele) /*-{
if (typeof ele.style.webkitTransition != 'undefined') {
return "webkitTransitionEnd";
} else {
if (typeof ele.style.transition != 'undefined') {
return "transitionend";
}
}
return "undefined";
}-*/;
/**
* Computes the height of passed HTML element.
*
* @param ele the height.
* @return the height in px
*/
public static native int getHeight(Element ele) /*-{
return parseInt($doc.defaultView.getComputedStyle(ele, "").getPropertyValue("height"));
}-*/;
/**
* Computes the width of passed HTML element.
*
* @param ele the width.
* @return the width in px
*/
public static native int getWidth(Element ele) /*-{
return parseInt($doc.defaultView.getComputedStyle(ele, "").getPropertyValue("width"));
}-*/;
/**
* Retuns the index of the target relative to his parent.
*
* @param parent the paent.
* @param target the target element.
* @return the child index.
*/
public static int getTargetItemIndex(Element parent, EventTarget target) {
Element div = Element.as(target);
if (div == parent) {
return -1;
}
while (div.getParentElement() != parent) {
div = div.getParentElement();
if (div == null) {
return -1;
}
}
return DOM.getChildIndex((com.google.gwt.user.client.Element) parent,
(com.google.gwt.user.client.Element) div);
}
/**
* Returns true if class1 ist sublass of class2
*
* @param class1 .
* @param class2 .
* @return ture if subclass.
*/
public static boolean isSubclassOf(Class class1, Class class2) {
while (class1 != null) {
if (class1 == class2) {
return true;
}
class1 = class1.getSuperclass();
}
return false;
}
}