Java tutorial
/* * Copyright 2008 Google Inc. * * 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 com.google.gwt.dom.client; import com.google.gwt.core.client.JavaScriptObject; /** * Multi-line text field. * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#edef-TEXTAREA"> * W3C HTML Specification</a> */ @TagName(TextAreaElement.TAG) public class TextAreaElement extends Element { public static final String TAG = "textarea"; /** * Assert that the given {@link Element} is compatible with this class and * automatically typecast it. */ public static TextAreaElement as(Element elem) { assert is(elem); return (TextAreaElement) elem; } /** * Determine whether the given {@link Element} can be cast to this class. A * <code>null</code> node will cause this method to return * <code>false</code>. */ public static boolean is(Element elem) { return elem != null && elem.hasTagName(TAG); } /** * Determines whether the given {@link JavaScriptObject} can be cast to this * class. A <code>null</code> object will cause this method to return * <code>false</code>. */ public static boolean is(JavaScriptObject o) { if (Element.is(o)) { return is(Element.as(o)); } return false; } /** * Determine whether the given {@link Node} can be cast to this class. A * <code>null</code> node will cause this method to return * <code>false</code>. */ public static boolean is(Node node) { if (Element.is(node)) { return is((Element) node); } return false; } protected TextAreaElement() { } /** * A single character access key to give access to the form control. * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-accesskey"> * W3C HTML Specification</a> */ public String getAccessKey() { return this.getPropertyString("accessKey"); } /** * Width of control (in characters). * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-cols-TEXTAREA"> * W3C HTML Specification</a> */ public int getCols() { return this.getPropertyInt("cols"); } /** * Represents the contents of the element. The value of this attribute does * not change if the contents of the corresponding form control, in an * interactive user agent, changes. */ public String getDefaultValue() { return this.getPropertyString("defaultValue"); } /** * @deprecated use {@link #isDisabled()} instead */ @Deprecated public boolean getDisabled() { throw new FixmeUnsupportedOperationException(); } /** * Returns the FORM element containing this control. Returns null if this * control is not within the context of a form. */ public FormElement getForm() { throw new FixmeUnsupportedOperationException(); } /** * Form control or object name when submitted with a form. * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-name-TEXTAREA"> * W3C HTML Specification</a> */ public String getName() { return this.getPropertyString("name"); } @Override public String getPropertyString(String name) { ensureRemoteCheck(); if ("value".equals(name)) { if (linkedToRemote()) { return typedRemote().getPropertyString(name); } else { return getInnerText(); } } return super.getPropertyString(name); } /** * @deprecated use {@link #isReadOnly()} instead. */ @Deprecated public boolean getReadOnly() { throw new FixmeUnsupportedOperationException(); } /** * Number of text rows. * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-rows-TEXTAREA"> * W3C HTML Specification</a> */ public int getRows() { return this.getPropertyInt("rows"); } /** * The type of this form control. This the string "textarea". */ public String getType() { return this.getPropertyString("type"); } /** * Represents the current contents of the corresponding form control, in an * interactive user agent. Changing this attribute changes the contents of * the form control, but does not change the contents of the element. If the * entirety of the data can not fit into a single string, the implementation * may truncate the data. */ public String getValue() { return this.getPropertyString("value"); } /** * The control is unavailable in this context. * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-disabled"> * W3C HTML Specification</a> */ public boolean isDisabled() { return this.getPropertyBoolean("disabled"); } /** * This control is read-only. * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-readonly"> * W3C HTML Specification</a> */ public boolean isReadOnly() { return this.getPropertyBoolean("readOnly"); } public final void select() { select0(ensureRemote()); } /** * A single character access key to give access to the form control. * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-accesskey"> * W3C HTML Specification</a> */ public void setAccessKey(String accessKey) { this.setPropertyString("accessKey", accessKey); } /** * Width of control (in characters). * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-cols-TEXTAREA"> * W3C HTML Specification</a> */ public void setCols(int cols) { this.setPropertyInt("cols", cols); } /** * Represents the contents of the element. The value of this attribute does * not change if the contents of the corresponding form control, in an * interactive user agent, changes. */ public void setDefaultValue(String defaultValue) { this.setPropertyString("defaultValue", defaultValue); } /** * The control is unavailable in this context. * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-disabled"> * W3C HTML Specification</a> */ public void setDisabled(boolean disabled) { this.setPropertyBoolean("disabled", disabled); } /** * Form control or object name when submitted with a form. * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-name-TEXTAREA"> * W3C HTML Specification</a> */ public void setName(String name) { this.setPropertyString("name", name); } @Override public void setPropertyBoolean(String name, boolean value) { ensureRemoteCheck(); if ((name.equals("readOnly") || name.equals("disabled")) && !value) { local().removeAttribute(name); } else { local().setPropertyBoolean(name, value); } remote().setPropertyBoolean(name, value); } @Override public void setPropertyString(String name, String value) { ensureRemoteCheck(); if ("value".equals(name)) { local().setInnerText(value); } else { local().setPropertyString(name, value); } remote().setPropertyString(name, value); } /** * This control is read-only. * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-readonly"> * W3C HTML Specification</a> */ public void setReadOnly(boolean readOnly) { this.setPropertyBoolean("readOnly", readOnly); } /** * Number of text rows. * * @see <a href= * "http://www.w3.org/TR/1999/REC-html401-19991224/interact/forms.html#adef-rows-TEXTAREA"> * W3C HTML Specification</a> */ public void setRows(int rows) { this.setPropertyInt("rows", rows); } /** * Represents the current contents of the corresponding form control, in an * interactive user agent. Changing this attribute changes the contents of * the form control, but does not change the contents of the element. If the * entirety of the data can not fit into a single string, the implementation * may truncate the data. */ public void setValue(String value) { this.setPropertyString("value", value); } /** * Select the contents of the TEXTAREA. */ native void select0(ElementRemote elt) /*-{ this.select(); }-*/; }