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package com.itmill.toolkit.ui;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Map;
import com.itmill.toolkit.terminal.PaintException;
import com.itmill.toolkit.terminal.PaintTarget;
public class PopupView extends AbstractComponentContainer {
Content itsContent;
boolean popupVisible;
ArrayList componentList;
/* Constructors */
/**
* A simple way to create a PopupPanel. Note that the minimal representation
* may not be dynamically updated, to achieve this create your own Content
* object.
*
* @param small
* the minimal textual representation as HTML
* @param large
* the full, Component-type representation
*/
public PopupView(final java.lang.String small, final Component large) {
this(new PopupView.Content() {
public java.lang.String getMinimizedValueAsHTML() {
return small;
}
public Component getPopupComponent() {
return large;
}
});
}
/**
* Creates a PopupView through the PopupView.Content interface. This allows
* the creator to dynamically change the contents of the PopupView.
*
* @param content
* the PopupView.Content that contains the information for this
*/
public PopupView(PopupView.Content content) {
super();
this.itsContent = content;
popupVisible = false;
componentList = new ArrayList(1);
}
/**
* This method will replace the current content of the panel with a new one.
* Give null to remove current content.
*
* @param newContent
* PopupView.Content object containing new information for the
* PopupView
*
*/
public void setContent(PopupView.Content content) {
this.itsContent = content;
requestRepaint();
}
/**
* Returns the content-package for this PopupView. Returns null if the
* PopupView has no content.
*
* @return the PopupView.Content for this object or null
*/
public PopupView.Content getContent() {
return itsContent;
}
/**
* Return whether the popup is visible.
*
* @return true if the popup is showing
*/
public boolean getPopupVisibility() {
return popupVisible;
}
/*
* Methods inherited from AbstractComponentContainer. These are unnecessary
* (but mandatory). Most of them are not supported in this implementation.
*/
/**
* Not supported in this implementation. Will return an empty iterator.
*
* @see com.itmill.toolkit.ui.ComponentContainer#getComponentIterator()
*/
public Iterator getComponentIterator() {
return componentList.iterator();
}
/**
* Not supported in this implementation.
*
* @see com.itmill.toolkit.ui.AbstractComponentContainer#removeAllComponents()
* @throws UnsupportedOperationException
*/
public void removeAllComponents() {
throw new UnsupportedOperationException();
}
/**
* In this implementation, moveComponents is not supported. It always throws
* UnsupportedOperationException.
*
* @see com.itmill.toolkit.ui.AbstractComponentContainer#moveComponentsFrom(com.itmill.toolkit.ui.ComponentContainer)
* @throws UnsupportedOperationException
*/
public void moveComponentsFrom(ComponentContainer source)
throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
* Not supported in this implementation.
*
* @see com.itmill.toolkit.ui.AbstractComponentContainer#addComponent(com.itmill.toolkit.ui.Component)
* @throws UnsupportedOperationException
*/
public void addComponent(Component c) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
* Not supported in this implementation. Always throws
* UnsupportedOperationException.
*
* @see com.itmill.toolkit.ui.ComponentContainer#replaceComponent(com.itmill.toolkit.ui.Component,
* com.itmill.toolkit.ui.Component)
* @throws UnsupportedOperationException
*/
public void replaceComponent(Component oldComponent, Component newComponent)
throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
* Not supported in this implementation
*
* @see com.itmill.toolkit.ui.AbstractComponentContainer#removeComponent(com.itmill.toolkit.ui.Component)
*/
public void removeComponent(Component c)
throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/*
* Methods for server-client communications.
*/
/**
* @see com.itmill.toolkit.ui.AbstractComponent#getTag()
*/
public java.lang.String getTag() {
return "popupview";
}
/**
* Paint (serialize) the component for the client.
*
* @see com.itmill.toolkit.ui.AbstractComponent#paintContent(com.itmill.toolkit.terminal.PaintTarget)
*/
public void paintContent(PaintTarget target) throws PaintException {
// Superclass writes any common attributes in the paint target.
super.paintContent(target);
target.addAttribute("html", itsContent.getMinimizedValueAsHTML());
target.addAttribute("popupVisible", popupVisible);
if (popupVisible) {
Component c = itsContent.getPopupComponent();
target.startTag("popupComponent");
c.paint(target);
target.endTag("popupComponent");
}
}
/**
* Deserialize changes received from client.
*
* @see com.itmill.toolkit.ui.AbstractComponent#changeVariables(java.lang.Object,
* java.util.Map)
*/
public void changeVariables(Object source, Map variables) {
if (variables.containsKey("popupVisibility")) {
// TODO we could use boolean allowPopup here to prevent popups from
// showing
popupVisible = ((Boolean) variables.get("popupVisibility"))
.booleanValue();
if (popupVisible) {
Component c = itsContent.getPopupComponent();
componentList.add(c);
super.addComponent(c);
} else if (!componentList.isEmpty()) {
super.removeComponent((Component) componentList.get(0));
componentList.clear();
}
requestRepaint();
}
}
/**
* Used to deliver customized content-packages to the PopupView. These are
* dynamically loaded when they are redrawn.
*/
public interface Content {
/**
* This should return a small view of the full data.
*
* @return value in HTML format
*/
public String getMinimizedValueAsHTML();
/**
* This should return the full Component representing the data
*
* @return a Component for the value
*/
public Component getPopupComponent();
}
}
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