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- /*
- @ITMillApache2LicenseForJavaFiles@
- */
-
- package com.vaadin.ui;
-
- import java.io.Serializable;
- import java.util.Iterator;
-
- import com.vaadin.terminal.PaintException;
- import com.vaadin.terminal.PaintTarget;
- import com.vaadin.terminal.gwt.client.ui.VCustomComponent;
-
- /**
- * Custom component provides simple implementation of Component interface for
- * creation of new UI components by composition of existing components.
- * <p>
- * The component is used by inheriting the CustomComponent class and setting
- * composite root inside the Custom component. The composite root itself can
- * contain more components, but their interfaces are hidden from the users.
- * </p>
- *
- * @author IT Mill Ltd.
- * @version
- * @VERSION@
- * @since 3.0
- */
- @SuppressWarnings("serial")
- @ClientWidget(VCustomComponent.class)
- public class CustomComponent extends AbstractComponentContainer {
-
- /**
- * The root component implementing the custom component.
- */
- private Component root = null;
-
- /**
- * Type of the component.
- */
- private String componentType = null;
-
- /**
- * Constructs a new custom component.
- *
- * <p>
- * The component is implemented by wrapping the methods of the composition
- * root component given as parameter. The composition root must be set
- * before the component can be used.
- * </p>
- */
- public CustomComponent() {
- // expand horizontally by default
- setWidth(100, UNITS_PERCENTAGE);
- }
-
- /**
- * Constructs a new custom component.
- *
- * <p>
- * The component is implemented by wrapping the methods of the composition
- * root component given as parameter. The composition root must not be null
- * and can not be changed after the composition.
- * </p>
- *
- * @param compositionRoot
- * the root of the composition component tree.
- */
- public CustomComponent(Component compositionRoot) {
- this();
- setCompositionRoot(compositionRoot);
- }
-
- /**
- * Returns the composition root.
- *
- * @return the Component Composition root.
- */
- protected final Component getCompositionRoot() {
- return root;
- }
-
- /**
- * Sets the compositions root.
- * <p>
- * The composition root must be set to non-null value before the component
- * can be used. The composition root can only be set once.
- * </p>
- *
- * @param compositionRoot
- * the root of the composition component tree.
- */
- protected final void setCompositionRoot(Component compositionRoot) {
- if (compositionRoot != root) {
- if (root != null) {
- // remove old component
- super.removeComponent(root);
- }
- if (compositionRoot != null) {
- // set new component
- super.addComponent(compositionRoot);
- }
- root = compositionRoot;
- requestRepaint();
- }
- }
-
- /* Basic component features ------------------------------------------ */
-
- @Override
- public void paintContent(PaintTarget target) throws PaintException {
- if (root == null) {
- throw new IllegalStateException("Composition root must be set to"
- + " non-null value before the " + getClass().getName()
- + " can be painted");
- }
-
- if (getComponentType() != null) {
- target.addAttribute("type", getComponentType());
- }
- root.paint(target);
- }
-
- /**
- * Gets the component type.
- *
- * The component type is textual type of the component. This is included in
- * the UIDL as component tag attribute.
- *
- * @return the component type.
- */
- public String getComponentType() {
- return componentType;
- }
-
- /**
- * Sets the component type.
- *
- * The component type is textual type of the component. This is included in
- * the UIDL as component tag attribute.
- *
- * @param componentType
- * the componentType to set.
- */
- public void setComponentType(String componentType) {
- this.componentType = componentType;
- }
-
- @Override
- public String getTag() {
- return "customcomponent";
- }
-
- private class ComponentIterator implements Iterator, Serializable {
- boolean first = getCompositionRoot() != null;
-
- public boolean hasNext() {
- return first;
- }
-
- public Object next() {
- first = false;
- return root;
- }
-
- public void remove() {
- throw new UnsupportedOperationException();
- }
- }
-
- @SuppressWarnings("unchecked")
- public Iterator getComponentIterator() {
- return new ComponentIterator();
- }
-
- /**
- * This method is not supported by CustomComponent.
- *
- * @see com.vaadin.ui.ComponentContainer#replaceComponent(com.vaadin.ui.Component,
- * com.vaadin.ui.Component)
- */
- public void replaceComponent(Component oldComponent, Component newComponent) {
- throw new UnsupportedOperationException();
- }
-
- /**
- * This method is not supported by CustomComponent. Use
- * {@link CustomComponent#setCompositionRoot(Component)} to set
- * CustomComponents "child".
- *
- * @see com.vaadin.ui.AbstractComponentContainer#addComponent(com.vaadin.ui.Component)
- */
- @Override
- public void addComponent(Component c) {
- throw new UnsupportedOperationException();
- }
-
- /**
- * This method is not supported by CustomComponent.
- *
- * @see com.vaadin.ui.AbstractComponentContainer#moveComponentsFrom(com.vaadin.ui.ComponentContainer)
- */
- @Override
- public void moveComponentsFrom(ComponentContainer source) {
- throw new UnsupportedOperationException();
- }
-
- /**
- * This method is not supported by CustomComponent.
- *
- * @see com.vaadin.ui.AbstractComponentContainer#removeAllComponents()
- */
- @Override
- public void removeAllComponents() {
- throw new UnsupportedOperationException();
- }
-
- /**
- * This method is not supported by CustomComponent.
- *
- * @see com.vaadin.ui.AbstractComponentContainer#removeComponent(com.vaadin.ui.Component)
- */
- @Override
- public void removeComponent(Component c) {
- throw new UnsupportedOperationException();
- }
-
- }
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