echopointng.ui.syncpeer.ComboBoxPeer Maven / Gradle / Ivy
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/*
* This file is part of the Echo Point Project. This project is a collection
* of Components that have extended the Echo Web Application Framework.
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*/
package echopointng.ui.syncpeer;
import nextapp.echo2.app.Component;
import nextapp.echo2.app.Extent;
import nextapp.echo2.app.Insets;
import nextapp.echo2.app.Style;
import nextapp.echo2.app.list.ListCellRenderer;
import nextapp.echo2.app.list.ListModel;
import nextapp.echo2.app.list.StyledListCell;
import nextapp.echo2.webcontainer.RenderContext;
import nextapp.echo2.webcontainer.propertyrender.ColorRender;
import nextapp.echo2.webcontainer.propertyrender.FontRender;
import nextapp.echo2.webcontainer.propertyrender.InsetsRender;
import nextapp.echo2.webrender.ServerMessage;
import nextapp.echo2.webrender.Service;
import nextapp.echo2.webrender.WebRenderServlet;
import nextapp.echo2.webrender.output.CssStyle;
import nextapp.echo2.webrender.service.JavaScriptService;
import org.w3c.dom.Element;
import echopointng.ComboBox;
import echopointng.able.Widthable;
import echopointng.ui.util.Render;
import echopointng.ui.util.RenderingContext;
import echopointng.util.QuoterKit;
/**
* ComboBoxPeer is the peer for the ComboBox
*/
public class ComboBoxPeer extends PopUpPeer {
protected static final Insets DEFAULT_ITEM_INSETS = new Insets(new Extent(2), new Extent(1));
/**
* Service to provide supporting JavaScript library.
*/
public static final Service COMBOBOX_SERVICE = JavaScriptService.forResource("EPNG.ComboBox", "/echopointng/ui/resource/js/combobox.js");
static {
WebRenderServlet.getServiceRegistry().add(COMBOBOX_SERVICE);
}
/**
* This is called to render the popup floating box. Overrides the
* base implementation.
*
* @return a new top level Element for the floating box
*/
protected Element renderBox(RenderingContext rc, Component component, Style fallbackStyle) {
ComboBox combo = (ComboBox) component;
rc.addLibrary(COMBOBOX_SERVICE);
createInitDirective(rc, combo);
CssStyle cssStyle = createListBoxStyle(rc, combo, fallbackStyle);
Element divBox = rc.createE("div");
divBox.setAttribute("id", rc.getElementId() + "|Box");
divBox.setAttribute("style", cssStyle.renderInline());
return divBox;
}
/**
* Renders a directive to the outgoing ServerMessage to
* initialize the state of a ComboBox, performing tasks such as registering
* event listeners on the client and creating the EPComboBox JS object.
*
* Not that this does not overrride the base createInitDirective() but rather
* augments it by assuming it has run first.
*/
protected void createInitDirective(RenderingContext rc, ComboBox combo) {
ServerMessage serverMessage = rc.getServerMessage();
String elementId = rc.getElementId();
// Create the element containing initialisation parameters for the ComboBox
Element itemizedUpdateElement = serverMessage.getItemizedDirective(ServerMessage.GROUP_ID_POSTUPDATE, "EPComboBox.MessageProcessor",
"init", new String[0], new String[0]);
Element itemElement = serverMessage.getDocument().createElement("item");
itemElement.setAttribute("eid", elementId);
itemElement.setAttribute("defaultItemStyle", createDefaultListItemStyle().renderInline());
itemElement.setAttribute("defaultHoverStyle", createDefaultListItemHoverStyle().renderInline());
itemElement.setAttribute("textMatching", String.valueOf(combo.isTextMatchingPerformed()));
itemElement.setAttribute("visibleRows", Integer.toString(combo.getListRowCount()));
itemElement.setAttribute("actionOnSelection", String.valueOf(combo.isActionOnSelection() && combo.hasActionListeners()));
itemElement.setAttribute("caseSensitive", String.valueOf(combo.isCaseSensitive()));
itemizedUpdateElement.appendChild(itemElement);
// Create an element for each option
Element optionsElement = serverMessage.getDocument().createElement("options");
ListModel model = combo.getListModel();
ListCellRenderer renderer = combo.getListCellRenderer();
for (int i = 0; i < model.size(); i++) {
Object value = combo.getListModel().get(i);
Object renderedValue = renderer.getListCellRendererComponent(combo, value, i);
String itemValue = QuoterKit.quoteJ(renderedValue.toString(), '\'');
CssStyle itemStyle = null;
if (renderedValue instanceof StyledListCell) {
StyledListCell styledListCell = (StyledListCell) renderedValue;
itemStyle = createDefaultListItemStyle();
ColorRender.renderToStyle(itemStyle, styledListCell.getForeground(), styledListCell.getBackground());
FontRender.renderToStyle(itemStyle, styledListCell.getFont());
}
Element optionElement = serverMessage.getDocument().createElement("option");
optionElement.setAttribute("value", itemValue);
optionElement.setAttribute("style", itemStyle == null ? "" : itemStyle.renderInline());
optionsElement.appendChild(optionElement);
}
if (optionsElement.hasChildNodes()) itemElement.appendChild(optionsElement);
}
/**
* Creates the default style for each item of the drop-down list.
*
* @return the style
*/
private static CssStyle createDefaultListItemStyle() {
CssStyle style = new CssStyle();
InsetsRender.renderToStyle(style, "padding", DEFAULT_ITEM_INSETS);
style.setAttribute("white-space", "nowrap");
return style;
}
/**
* Creates the default hover style for each item of the drop-down list.
*
* @return the style
*/
private static CssStyle createDefaultListItemHoverStyle() {
CssStyle style = createDefaultListItemStyle();
style.setAttribute("background-color", "Highlight");
style.setAttribute("color", "HighlightText");
return style;
}
/**
* Creates the style for the outer div of the drop-down list.
*
* @param rc the relevant RenderContext
* @param component the ComboBox instance
*
* @return the style
*/
private CssStyle createListBoxStyle(RenderContext rc, Component component, Style fallbackStyle) {
CssStyle style = new CssStyle();
Render.asBorder(style, component, ComboBox.PROPERTY_POPUP_BORDER, fallbackStyle);
Render.asInsets(style, component, ComboBox.PROPERTY_POPUP_INSETS, "padding", fallbackStyle);
Render.asInsets(style, component, ComboBox.PROPERTY_POPUP_OUTSETS, "margin", fallbackStyle);
Render.asColors(style, component, ComboBox.PROPERTY_POPUP_BACKGROUND, null, fallbackStyle);
Render.asFont(style, component, fallbackStyle);
Render.asWidthable(style, (Widthable) component);
style.setAttribute("position", "absolute");
style.setAttribute("visibility", "hidden");
style.setAttribute("left", "0px");
style.setAttribute("top", "0px");
style.setAttribute("overflow", "auto");
style.setAttribute("cursor", "default");
Render.layoutFix(rc,style);
return style;
}
}