javax.swing.text.html: public class: ObjectView

javax.swing.text.html
public class: ObjectView [javadoc | source]

java.lang.Object
   javax.swing.text.View
      javax.swing.text.ComponentView
         javax.swing.text.html.ObjectView

All Implemented Interfaces:
SwingConstants

Component decorator that implements the view interface for <object> elements.

This view will try to load the class specified by the classid attribute. If possible, the Classloader used to load the associated Document is used. This would typically be the same as the ClassLoader used to load the EditorKit. If the document's ClassLoader is null, Class.forName is used.

If the class can successfully be loaded, an attempt will be made to create an instance of it by calling Class.newInstance. An attempt will be made to narrow the instance to type java.awt.Component to display the object.

This view can also manage a set of parameters with limitations. The parameters to the <object> element are expected to be present on the associated elements attribute set as simple strings. Each bean property will be queried as a key on the AttributeSet, with the expectation that a non-null value (of type String) will be present if there was a parameter specification for the property. Reflection is used to set the parameter. Currently, this is limited to a very simple single parameter of type String.

A simple example HTML invocation is:

     <object classid="javax.swing.JLabel">
     <param name="text" value="sample text">
     </object>

author: Timothy - Prinzing

Fields inherited from javax.swing.text.View:
BadBreakWeight, GoodBreakWeight, ExcellentBreakWeight, ForcedBreakWeight, X_AXIS, Y_AXIS, sharedBiasReturn

Constructor:

Constructor:
public ObjectView(Element elem) { super(elem); } Creates a new ObjectView object. Parameters: `elem` - the element to decorate

 public ObjectView(Element elem) {
        super(elem);
}

Creates a new ObjectView object.

Parameters:

elem - the element to decorate

Method from javax.swing.text.html.ObjectView Summary:
createComponent, getUnloadableRepresentation

Methods from javax.swing.text.ComponentView:
createComponent, getAlignment, getComponent, getMaximumSpan, getMinimumSpan, getPreferredSpan, modelToView, paint, setComponentParent, setParent, viewToModel

Methods from javax.swing.text.View:
append, breakView, changedUpdate, createFragment, forwardUpdate, forwardUpdateToView, getAlignment, getAttributes, getBreakWeight, getChildAllocation, getContainer, getDocument, getElement, getEndOffset, getGraphics, getMaximumSpan, getMinimumSpan, getNextVisualPositionFrom, getParent, getPreferredSpan, getResizeWeight, getStartOffset, getToolTipText, getView, getViewCount, getViewFactory, getViewIndex, getViewIndex, insert, insertUpdate, isVisible, modelToView, modelToView, modelToView, paint, preferenceChanged, remove, removeAll, removeUpdate, replace, setParent, setSize, updateChildren, updateLayout, viewToModel, viewToModel

Methods from javax.swing.text.View:

append, breakView, changedUpdate, createFragment, forwardUpdate, forwardUpdateToView, getAlignment, getAttributes, getBreakWeight, getChildAllocation, getContainer, getDocument, getElement, getEndOffset, getGraphics, getMaximumSpan, getMinimumSpan, getNextVisualPositionFrom, getParent, getPreferredSpan, getResizeWeight, getStartOffset, getToolTipText, getView, getViewCount, getViewFactory, getViewIndex, getViewIndex, insert, insertUpdate, isVisible, modelToView, modelToView, modelToView, paint, preferenceChanged, remove, removeAll, removeUpdate, replace, setParent, setSize, updateChildren, updateLayout, viewToModel, viewToModel

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from javax.swing.text.html.ObjectView Detail:
protected Component createComponent() { AttributeSet attr = getElement().getAttributes(); String classname = (String) attr.getAttribute(HTML.Attribute.CLASSID); try { Class c = Class.forName(classname, true,Thread.currentThread(). getContextClassLoader()); Object o = c.newInstance(); if (o instanceof Component) { Component comp = (Component) o; setParameters(comp, attr); return comp; } } catch (Throwable e) { // couldn't create a component... fall through to the // couldn't load representation. } return getUnloadableRepresentation(); } Create the component. The classid is used as a specification of the classname, which we try to load.
Component getUnloadableRepresentation() { // PENDING(prinz) get some artwork and return something // interesting here. Component comp = new JLabel("??"); comp.setForeground(Color.red); return comp; } Fetch a component that can be used to represent the object if it can't be created.

Method from javax.swing.text.html.ObjectView Detail:

 protected Component createComponent() {
        AttributeSet attr = getElement().getAttributes();
        String classname = (String) attr.getAttribute(HTML.Attribute.CLASSID);
        try {
            Class c = Class.forName(classname, true,Thread.currentThread().
                                    getContextClassLoader());
            Object o = c.newInstance();
            if (o instanceof Component) {
                Component comp = (Component) o;
                setParameters(comp, attr);
                return comp;
            }
        } catch (Throwable e) {
            // couldn't create a component... fall through to the
            // couldn't load representation.
        }
        return getUnloadableRepresentation();
}

Create the component. The classid is used as a specification of the classname, which we try to load.

 Component getUnloadableRepresentation() {
        // PENDING(prinz) get some artwork and return something
        // interesting here.
        Component comp = new JLabel("??");
        comp.setForeground(Color.red);
        return comp;
}

Fetch a component that can be used to represent the object if it can't be created.