/*
* This library is part of Geranium -
* an open source UI library for GWT.
*
* Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)-
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* For further information about Alkacon Software, please see the
* company website: http://www.alkacon.com
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.alkacon.geranium.client.ui;
import com.alkacon.geranium.client.ui.css.I_LayoutBundle;
import com.alkacon.geranium.client.util.DomUtil;
import com.alkacon.geranium.client.util.DomUtil.Method;
import java.util.Map;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.dom.client.FormElement;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.Widget;
/**
* Frame dialog utility class.<p>
*
* Use to render the dialog content within an iFrame on top of a regular {@link com.alkacon.geranium.client.ui.Popup}.
* May also be used to wrap the popup if no iFrame is needed.<p>
*
* Provides function to show an iFrame dialog.<p>
*/
public class FrameDialog {
/** The name of the close function. */
public static final String CLOSE_FUNCTION = "cmsDialogClose";
/** The dialog height. */
public static final int DIALOG_HEIGHT = 300;
/** The dialog width. */
public static final int DIALOG_WIDTH = 200;
/** The name of the enable dialog close function. */
public static final String ENABLE_CLOSE_FUNCTION = "cmsEnableDialogClose";
/** The name of the dialog height function. */
public static final String HEIGHT_FUNCTION = "cmsDialogHeight";
/** The name of the IFrame used for displaying the upload hook page. */
public static final String IFRAME_NAME = "upload_hook";
/** The name of the dialog title function. */
public static final String TITLE_FUNCTION = "cmsDialogTitle";
/** The name of the dialog width function. */
public static final String WIDTH_FUNCTION = "cmsUploadHookDialogWidth";
/** The button panel. */
private FlowPanel m_buttonPanel;
/** The content widget. */
private Widget m_content;
/** The panel holding the content widget. */
private SimplePanel m_contentPanel;
/** Flag indicating if this dialog is displayed within an iFrame on top of a popup. */
private boolean m_isFrame;
/** Flag indicating that the dialog is showing.< */
private boolean m_isShowing;
/** The main panel. */
private FlowPanel m_main;
/** The popup. */
private Popup m_popup;
/**
* Constructor.<p>
*/
public FrameDialog() {
m_isFrame = hasParentFrame();
if (m_isFrame) {
m_main = new FlowPanel();
m_main.addStyleName(I_LayoutBundle.INSTANCE.dialogCss().frameDialog());
m_contentPanel = new SimplePanel();
m_contentPanel.addStyleName(I_LayoutBundle.INSTANCE.dialogCss().popupMainContent());
m_contentPanel.addStyleName(I_LayoutBundle.INSTANCE.dialogCss().contentPadding());
m_main.add(m_contentPanel);
} else {
m_popup = new Popup();
m_popup.setGlassEnabled(true);
}
}
/**
* Returns if this dialog has a parent frame.<p>
*
* @return <code>true</code> if the parent frame is available
*/
public static native boolean hasParentFrame() /*-{
if ($wnd.parent[@com.alkacon.geranium.client.ui.FrameDialog::CLOSE_FUNCTION]) {
return true;
}
return false;
}-*/;
/**
* Shows an iFrame dialog popup.<p>
*
* @param title the dialog title
* @param dialogUri the dialog URI
* @param parameters the dialog post parameters
* @param closeHandler the dialog close handler
*
* @return the opened popup
*/
public static Popup showFrameDialog(
String title,
String dialogUri,
Map<String, String> parameters,
CloseHandler<PopupPanel> closeHandler) {
Popup popup = new Popup(title);
popup.removePadding();
popup.addStyleName(I_LayoutBundle.INSTANCE.contentEditorCss().contentEditor());
popup.setGlassEnabled(true);
IFrame editorFrame = new IFrame(IFRAME_NAME, "");
popup.add(editorFrame);
final FormElement formElement = DomUtil.generateHiddenForm(dialogUri, Method.post, IFRAME_NAME, parameters);
RootPanel.getBodyElement().appendChild(formElement);
exportDialogFunctions(popup);
popup.addCloseHandler(new CloseHandler<PopupPanel>() {
public void onClose(CloseEvent<PopupPanel> event) {
formElement.removeFromParent();
removeExportedFunctions();
}
});
if (closeHandler != null) {
popup.addCloseHandler(closeHandler);
}
popup.center();
formElement.submit();
return popup;
}
/**
* Removes exported functions from the window context.<p>
*/
protected static native void removeExportedFunctions() /*-{
$wnd[@com.alkacon.geranium.client.ui.FrameDialog::CLOSE_FUNCTION] = null;
$wnd[@com.alkacon.geranium.client.ui.FrameDialog::HEIGHT_FUNCTION] = null;
$wnd[@com.alkacon.geranium.client.ui.FrameDialog::WIDTH_FUNCTION] = null;
$wnd[@com.alkacon.geranium.client.ui.FrameDialog::TITLE_FUNCTION] = null;
}-*/;
/**
* Installs the Javascript function which should be called by the child iframe when the dialog should be closed.<p>
*
* @param popup the popup
*/
private static native void exportDialogFunctions(final Popup popup) /*-{
var self = this;
$wnd[@com.alkacon.geranium.client.ui.FrameDialog::CLOSE_FUNCTION] = function() {
popup.@com.alkacon.geranium.client.ui.Popup::hide()();
};
$wnd[@com.alkacon.geranium.client.ui.FrameDialog::HEIGHT_FUNCTION] = function(
height) {
popup.@com.alkacon.geranium.client.ui.Popup::setHeight(I)(height);
if (popup.@com.alkacon.geranium.client.ui.Popup::isShowing()) {
popup.@com.alkacon.geranium.client.ui.Popup::center()();
}
};
$wnd[@com.alkacon.geranium.client.ui.FrameDialog::WIDTH_FUNCTION] = function(
width) {
popup.@com.alkacon.geranium.client.ui.Popup::setWidth(I)(width);
if (popup.@com.alkacon.geranium.client.ui.Popup::isShowing()) {
popup.@com.alkacon.geranium.client.ui.Popup::center()();
}
};
$wnd[@com.alkacon.geranium.client.ui.FrameDialog::TITLE_FUNCTION] = function(
title) {
popup.@com.alkacon.geranium.client.ui.Popup::setCaption(Ljava/lang/String;)(title);
};
$wnd[@com.alkacon.geranium.client.ui.FrameDialog::ENABLE_CLOSE_FUNCTION] = function(
title) {
popup.@com.alkacon.geranium.client.ui.Popup::addDialogClose(Lcom/google/gwt/user/client/Command;)(null);
};
}-*/;
/**
* Adds a new button to the button bar.<p>
*
* @param button the button to add
*/
public void addButton(Widget button) {
if (m_isFrame) {
initButtonPanel();
m_buttonPanel.add(button);
} else {
m_popup.addButton(button);
}
}
/**
* Adds a new button to the button bar at the specified index position.<p>
*
* @param button the button to add
* @param index the index position
*/
public void addButton(Widget button, int index) {
if (m_isFrame) {
initButtonPanel();
m_buttonPanel.insert(button, index);
} else {
m_popup.addButton(button, index);
}
}
/**
* Enables the dialog close button on the popup.<p>
*/
public void enableDialogClose() {
if (m_isFrame) {
enableParentDialogClose();
} else {
m_popup.addDialogClose(null);
}
}
/**
* Hides the dialog.<p>
*/
public void hide() {
if (m_isFrame) {
hideParent();
} else {
m_popup.hide();
}
}
/**
* Returns if the popup is showing and the content is rendered.<p>
*
* @return <code>true</code> if the popup and content are showing
*/
public boolean isShowing() {
if (m_isFrame) {
return m_isShowing;
} else {
return m_popup.isShowing();
}
}
/**
* Removes the given button from the button bar.<p>
*
* @param button the button to remove
*/
public void removeButton(Widget button) {
if (m_isFrame) {
if (m_buttonPanel != null) {
m_buttonPanel.remove(button);
}
} else {
m_popup.removeButton(button);
}
}
/**
* Sets the content widget.<p>
*
* @param content the content widget
*/
public void setContent(Widget content) {
if (m_content != null) {
m_content.removeFromParent();
}
if (m_isFrame) {
m_contentPanel.setWidget(content);
} else {
m_popup.setMainContent(content);
}
m_content = content;
}
/**
* Sets the popup height.<p>
*
* @param height the height
*/
public void setHeight(int height) {
if (m_isFrame) {
setParentHeight(height);
} else {
m_popup.setHeight(height);
if (m_popup.isShowing()) {
m_popup.center();
}
}
}
/**
* Sets the dialog title.<p>
*
* @param title the title
*/
public void setTitle(String title) {
if (m_isFrame) {
setParentTitle(title);
} else {
m_popup.setCaption(title);
}
}
/**
* Sets the popup width.<p>
*
* @param width the width
*/
public void setWidth(int width) {
if (m_isFrame) {
setParentWidth(width);
} else {
m_popup.setWidth(width);
if (m_popup.isShowing()) {
m_popup.center();
}
}
}
/**
* Shows the dialog.<p>
*/
public void show() {
if (m_isFrame) {
RootPanel root = RootPanel.get();
root.getElement().getStyle().setMargin(0, Unit.PX);
root.getElement().getStyle().setPadding(0, Unit.PX);
RootPanel.get().add(m_main);
m_isShowing = true;
Scheduler.get().scheduleDeferred(new ScheduledCommand() {
public void execute() {
adjustContentSize();
}
});
} else {
m_popup.center();
}
}
/**
* Adjusts the content panel size according to the button panel height.<p>
*/
protected void adjustContentSize() {
if (m_isFrame && m_isShowing) {
if (m_buttonPanel != null) {
m_contentPanel.getElement().getStyle().setBottom(m_buttonPanel.getOffsetHeight() + 6, Unit.PX);
} else {
m_contentPanel.getElement().getStyle().clearBottom();
}
}
}
/**
* Enables the dialog close button on the parent frame popup.<p>
*/
private native void enableParentDialogClose() /*-{
$wnd.parent[@com.alkacon.geranium.client.ui.FrameDialog::ENABLE_CLOSE_FUNCTION]
();
}-*/;
/**
* Hides the parent dialog.<p>
*/
private native void hideParent() /*-{
$wnd.parent[@com.alkacon.geranium.client.ui.FrameDialog::CLOSE_FUNCTION]
();
}-*/;
/**
* Initializes the button panel within frame mode.<p>
*/
private void initButtonPanel() {
if ((m_buttonPanel == null) && m_isFrame) {
m_buttonPanel = new FlowPanel();
m_buttonPanel.addStyleName(I_LayoutBundle.INSTANCE.dialogCss().popupButtonPanel());
m_main.add(m_buttonPanel);
}
}
/**
* Sets the parent dialog height.<p>
*
* @param height the height to set
*/
private native void setParentHeight(int height) /*-{
$wnd.parent[@com.alkacon.geranium.client.ui.FrameDialog::HEIGHT_FUNCTION]
(height);
}-*/;
/**
* Sets the title of the parent dialog.<p>
*
* @param title the title
*/
private native void setParentTitle(String title) /*-{
$wnd.parent[@com.alkacon.geranium.client.ui.FrameDialog::TITLE_FUNCTION]
(title);
}-*/;
/**
* Sets the parent dialog width.<p>
*
* @param width the width to set
*/
private native void setParentWidth(int width) /*-{
$wnd.parent[@com.alkacon.geranium.client.ui.FrameDialog::WIDTH_FUNCTION]
(width);
}-*/;
}