import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
/**
 * Inserts an item into the list box, specifying its direction and an initial value for the item. If the index is less than zero, or greater than or equal
 * to the length of the list, then the item will be appended to the end of the list.
 *
 * @param item  the text of the item to be inserted
 * @param dir   the item's direction. If {@code null}, the item is displayed in the widget's overall direction, or, if a direction estimator has been set, in
 *              the item's estimated direction.
 * @param value the item's value, to be submitted if it is part of a {@link FormPanel}.
 * @param index the index at which to insert it
 */
public void insertItem(String item, Direction dir, String value, int index) {
    SelectElement select = getSelectElement();
    OptionElement option = Document.get().createOptionElement();
    setOptionText(option, item, dir);
    option.setValue(value);

    int itemCount = select.getLength();
    if (index < 0 || index > itemCount) {
        index = itemCount;
    }
    if (index == itemCount) {
        select.add(option, null);
    } else {
        OptionElement before = select.getOptions().getItem(index);
        select.add(option, before);
    }
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
/**
 * Sets the text of an option element. If the direction of the text is opposite to the page's direction, also wraps it with Unicode bidi formatting
 * characters to prevent garbling, and indicates that this was done by setting the option's <code>BIDI_ATTR_NAME</code> custom attribute.
 *
 * @param option an option element
 * @param text   text to be set to the element
 * @param dir    the text's direction. If {@code null} and direction estimation is turned off, direction is ignored.
 */
protected void setOptionText(OptionElement option, String text, Direction dir) {
    if (dir == null && estimator != null) {
        dir = estimator.estimateDirection(text);
    }
    if (dir == null) {
        option.setText(text);
        option.removeAttribute(BIDI_ATTR_NAME);
    } else {
        String formattedText = BidiFormatter.getInstanceForCurrentLocale().unicodeWrapWithKnownDir(dir, text, false /* isHtml */, false /* dirReset */);
        option.setText(formattedText);
        if (formattedText.length() > text.length()) {
            option.setAttribute(BIDI_ATTR_NAME, "");
        } else {
            option.removeAttribute(BIDI_ATTR_NAME);
        }
    }
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
private SelectHandler createUrlToShare(final VerticalPanel geoDataContainer) {
	return new SelectHandler() {
		@Override
		public void onSelect(SelectEvent event) {
			urlToShareAnchor.setHref(getHref());
			urlToShareAnchor.setText(
					UIMessages.INSTANCE.seeOtherWindow("GeoWE Project"),
					Direction.LTR);

			urlShared.setText(getHref());
			urlPanel.setVisible(true);
			urlShared.setVisible(true);
		}

		private String getHref() {
			String baseUrl = GWT.getHostPageBaseURL();

			baseUrl += "?projectUrl="
					+ URL.encodeQueryString(urlTextField.getValue());

			return baseUrl;
		}
	};
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
@Override
public void insertItem(String item, Direction dir, String value, int index) {
    SelectElement select = getElement().cast();
    OptionElement option = Document.get().createOptionElement();
    setOptionText(option, item, dir);
    option.setValue(value);
    option.setTitle(item);

    int itemCount = select.getLength();
    if (index < 0 || index > itemCount) {
        index = itemCount;
    }
    if (index == itemCount) {
        select.add(option, null);
    } else {
        OptionElement before = select.getOptions().getItem(index);
        select.add(option, before);
    }
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
/**
 * Show a source file based on the selection in the source list.
 */
private void showSourceFile() {
  if (content == null) {
    return;
  }

  // Set the highlighted tab.
  tabExample.getElement().getStyle().clearColor();
  tabStyle.getElement().getStyle().clearColor();
  tabSource.getElement().getStyle().setColor(SELECTED_TAB_COLOR);

  contentSource.setHTML(loadingHtml, Direction.LTR);
  contentPanel.setWidget(new ScrollPanel(contentSource));
  if (!tabSourceList.isVisible() || tabSourceList.getSelectedIndex() == 0) {
    // If the source list isn't visible or the first item is selected, load
    // the source for the example.
    content.getSource(new CustomCallback());
  } else {
    // Load a raw file.
    String filename = tabSourceList.getItemText(
        tabSourceList.getSelectedIndex());
    content.getRawSource(filename, new CustomCallback());
  }
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
private SelectHandler createUrlToShare(final VerticalPanel geoDataContainer) {
	return new SelectHandler() {
		@Override
		public void onSelect(SelectEvent event) {
			urlToShareAnchor.setHref(getHref());
			urlToShareAnchor.setText(
					UIMessages.INSTANCE.seeOtherWindow(getLayerName()),
					Direction.LTR);

			urlShared.setText(getHref());
			urlPanel.setVisible(true);
			urlShared.setVisible(true);
		}

		private String getHref() {
			String baseUrl = GWT.getHostPageBaseURL();

			baseUrl += "?layerUrl="
					+ URL.encodeQueryString(urlTextField.getValue())
					+ "&layerName=" + getLayerName() + "&layerProj="
					+ getProjectionName() + "&layerFormat="
					+ getDataFormat();

			return baseUrl;
		}
	};
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
/**
 * Sets the text in the text box.
 *
 * @param text
 *            the text to set in the text box
 */
public void setText(final String text) {
	/**
	 * To leave caret in the beginning of the line. SetSelectionRange
	 * wouldn't work on IE (see #13477)
	 */
	Direction previousDirection = this.tb.getDirection();
	this.tb.setDirection(Direction.RTL);
	this.tb.setText(text);
	this.tb.setDirection(previousDirection);
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
/**
 * Show the source CSS style.
 */
private void showSourceStyles() {
  if (content == null) {
    return;
  }

  // Set the highlighted tab.
  tabExample.getElement().getStyle().clearColor();
  tabStyle.getElement().getStyle().setColor(SELECTED_TAB_COLOR);
  tabSource.getElement().getStyle().clearColor();

  contentSource.setHTML(loadingHtml, Direction.LTR);
  contentPanel.setWidget(new ScrollPanel(contentSource));
  content.getStyle(new CustomCallback());
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
@Override
public Direction getTextDirection() {
    return directionalTextHelper.getTextDirection();
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
@Override
public void setHTML(SafeHtml html, Direction dir) {
    directionalTextHelper.setTextOrHtml(html.asString(), dir, true);
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
@Override
public void setText(String text, Direction dir) {
    directionalTextHelper.setTextOrHtml(text, dir, false);
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
public MaterialCheckBox(SafeHtml label, Direction dir) {
    super(label, dir);
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
public MaterialRadioButton(String name, SafeHtml label, Direction dir) {
    super(name, label, dir);
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
public void onError() {
  if (id == nextCallbackId) {
    contentSource.setHTML("Cannot find resource", Direction.LTR);
  }
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
public void onSuccess(String value) {
  if (id == nextCallbackId) {
    contentSource.setHTML(value, Direction.LTR);
  }
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
/**
 * Sets the text associated with the item at a given index.
 *
 * @param index the index of the item to be set
 * @param text  the item's new text
 * @param dir   the item's direction.
 * @throws IndexOutOfBoundsException if the index is out of range
 */
public void setItemText(int index, String text, Direction dir) {
    checkIndex(index);
    if (text == null) {
        throw new NullPointerException("Cannot set an option to have null text");
    }
    setOptionText(getSelectElement().getOptions().getItem(index), text, dir);
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
/**
 * Adds an item to the list box, specifying its direction. This method has
 * the same effect as
 * <pre>addItem(value, dir, item)</pre>
 *
 * @param value  the item's value, to be submitted if it is part of a
 *              {@link FormPanel}; cannot be <code>null</code>
 * @param dir    the item's direction
 * @param reload perform a 'material select' reload to update the DOM.
 */
public void addItem(T value, Direction dir, boolean reload) {
    values.add(value);
    listBox.addItem(keyFactory.generateKey(value), dir);

    if (reload) {
        reload();
    }
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
/**
 * Inserts an item into the list box, specifying its direction. Has the same
 * effect as
 * <pre>insertItem(value, dir, item, index)</pre>
 *
 * @param value  the item's value, to be submitted if it is part of a
 *              {@link FormPanel}.
 * @param dir    the item's direction
 * @param index  the index at which to insert it
 * @param reload perform a 'material select' reload to update the DOM.
 */
public void insertItem(T value, Direction dir, int index, boolean reload) {
    values.add(index, value);
    listBox.insertItem(keyFactory.generateKey(value), dir, index);

    if (reload) {
        reload();
    }
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
/**
 * Adds an item to the list box, specifying its direction. This method has the same effect as
 * <p/>
 * <pre>
 * addItem(item, dir, item)
 * </pre>
 *
 * @param item the text of the item to be added
 * @param dir  the item's direction
 */
public void addItem(String item, Direction dir) {
    insertItem(item, dir, INSERT_AT_END);
}
 

import com.google.gwt.i18n.client.HasDirection.Direction; //导入依赖的package包/类
/**
 * Creates a check box with the specified text label.
 *
 * @param label the check box's label
 * @param dir   the text's direction. Note that {@code DEFAULT} means direction
 *              should be inherited from the widget's parent element.
 */
public BaseCheckBox(SafeHtml label, Direction dir) {
    this();
    setHTML(label, dir);
}