495 lines
16 KiB
Java
495 lines
16 KiB
Java
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/*
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* Copyright (c) 2003,2009 Declarative Engineering LLC.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Declarative Engineering LLC
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* verson 1 which accompanies this distribution, and is available at
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* http://declarativeengineering.com/legal/DE_Developer_License_v1.txt
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*/
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package com.foundation.view.swt;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.events.*;
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import com.common.thread.IRunnable;
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import com.common.util.optimized.IntArray;
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import com.foundation.event.*;
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import com.foundation.view.JefImage;
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import com.foundation.view.MultiAssociationContainer;
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import com.foundation.view.MultiResourceAssociation;
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import com.foundation.view.ResourceAssociation;
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/**
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* Very similar to the list box control except that only one value can be selected at a time and the list only appears when the user requests to change the value.
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* The combo may also allow for custom user selections that are not in the list.
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*/
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public class ComboBox extends IndexedCollectionComponent implements IEventListener, SelectionListener, ModifyListener {
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//Styles//
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public static final int STYLE_DROP_DOWN = SWT.DROP_DOWN;
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public static final int STYLE_READ_ONLY = SWT.READ_ONLY;
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public static final int STYLE_SIMPLE = SWT.SIMPLE;
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/** Converts the collection item to a string used to show the item to the user. */
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protected MultiResourceAssociation itemText = new MultiResourceAssociation(this, this, getViewContext(), ResourceAssociation.TYPE_TEXT, false, null);
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/** Converts the collection item to an image used to show the item to the user. */
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protected MultiResourceAssociation itemImage = new MultiResourceAssociation(this, this, getViewContext(), ResourceAssociation.TYPE_IMAGE, false, null);
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/** Used to stop selection events from being handled while the items are being changed. */
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private boolean suspendSelectionEvents = false;
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/**
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* ComboBox constructor.
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* @param parent A composite control which will be the parent of the new instance (cannot be null).
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* @param name The unique component name.
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* @param style The style of control to construct.
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* @see #STYLE_DROP_DOWN
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* @see #STYLE_READ_ONLY
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* @see #STYLE_SIMPLE
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*/
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public ComboBox(Container parent, String name, int style) {
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super(parent, name, style);
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setAllowUserItems(!((style & STYLE_READ_ONLY) > 0));
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}//ComboBox()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.AbstractComponent#initializeControl(int)
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*/
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protected void initializeControl(int style, Object data) {
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setSwtWidget(new org.eclipse.swt.widgets.Combo(((Container) getContainer()).getSwtParent(), style));
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getSwtWidget().setData(this);
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}//initializeControl()//
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/**
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* Gets the SWT combo that represents this combo box.
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* @return The SWT combo providing visualization for this combo box.
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*/
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public org.eclipse.swt.widgets.Combo getSwtCombo() {
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return (org.eclipse.swt.widgets.Combo) getSwtControl();
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}//getSwtCombo()//
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/**
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* Sets the association container used to access the item text.
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* @param container The item text association metadata.
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*/
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public void setItemTextAssociation(MultiAssociationContainer container) {
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verifyThread();
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this.itemText.setAssociations(container);
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}//setItemTextAssociation()//
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/**
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* Sets the association container used to access the item image.
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* @param container The item image association metadata.
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*/
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public void setItemImageAssociation(MultiAssociationContainer container) {
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verifyThread();
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this.itemImage.setAssociations(container);
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}//setItemImageAssociation()//
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/**
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* Gets the component text size limit.
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* @return The maximum number of characters allowed in the text.
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*/
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public Integer getTextLimit() {
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verifyThread();
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return new Integer(getSwtCombo().getTextLimit());
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}//getTextLimit()//
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/**
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* Sets the component text size limit.
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* @param textLimit The maximum number of characters allowed in the text.
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*/
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public void setTextLimit(Integer textLimit) {
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verifyThread();
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getSwtCombo().setTextLimit(textLimit.intValue());
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}//setTextLimit()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.AbstractComponent#internalViewInitialize()
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*/
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protected void internalViewInitialize() {
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getSwtCombo().addSelectionListener(this);
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getSwtCombo().addModifyListener(this);
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itemText.initialize();
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itemImage.initialize();
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super.internalViewInitialize();
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}//internalViewInitialize()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.AbstractComponent#internalViewRelease()
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*/
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protected void internalViewRelease() {
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if((getSwtCombo() != null) && (!getSwtCombo().isDisposed())) {
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getSwtCombo().removeSelectionListener(this);
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getSwtCombo().removeModifyListener(this);
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}//if//
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super.internalViewRelease();
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itemText.release();
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itemImage.release();
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}//internalViewRelease()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.AbstractComponent#internalOnValueChanged(com.foundation.view.MultiResourceAssociation, java.lang.Object)
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*/
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protected void internalOnValueChanged(MultiResourceAssociation resourceAssociation, Object alteredItem, Object data, boolean isUpdate) {
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if(resourceAssociation == itemText) {
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Object indexData = getItemIndexData(alteredItem);
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//Set the new item text.//
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if(indexData instanceof Integer) {
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controlSetItem(((Integer) indexData).intValue(), itemToString(alteredItem));
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}//if//
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else if(indexData instanceof IntArray) {
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IntArray array = (IntArray) indexData;
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for(int index = 0; index < array.getSize(); index++) {
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controlSetItem(array.get(index), itemToString(alteredItem));
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}//for//
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}//if//
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}//if//
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else if(resourceAssociation == itemImage) {
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//TODO: Set the item image.
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}//else if//
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else {
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super.internalOnValueChanged(resourceAssociation, alteredItem, data, isUpdate);
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}//else//
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}//internalOnValueChanged()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.IndexedCollectionComponent#getItemData(java.lang.Object)
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*/
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protected Object getItemData(Object item) {
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return itemToString(item);
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}//getItemData()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#itemAdded(java.lang.Object, int)
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*/
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protected void itemAdded(Object item, int index) {
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registerItem(item);
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super.itemAdded(item, index);
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}//itemAdded()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#itemRemoved(java.lang.Object, int)
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*/
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protected void itemRemoved(Object item, int index) {
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unregisterItem(item);
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super.itemRemoved(item, index);
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}//itemRemoved()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#itemAllRemoved()
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*/
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protected void itemAllRemoved() {
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unregisterItems();
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super.itemAllRemoved();
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}//itemAllRemoved()//
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/**
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* Converts an item in the collection to a string that can be displayed.
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* @param item The collection item to convert.
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* @return The string that can be displayed.
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*/
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protected String itemToString(Object item) {
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String result = null;
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if(item instanceof JefImage) {
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return "";
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}//if//
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else {
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itemText.refresh(item);
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result = (String) itemText.getValue(item);
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if(result == null) {
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result = item != null ? item.toString() : "";
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}//if//
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}//if//
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return result;
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}//itemToString()//
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/**
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* Converts an item in the collection to an image that can be displayed.
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* @param item The collection item to convert.
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* @return The image that can be displayed.
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*/
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protected JefImage itemToImage(Object item) {
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JefImage result = null;
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if(item instanceof JefImage) {
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result = (JefImage) item;
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}//if//
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else {
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itemImage.refresh(item);
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result = (JefImage) itemImage.getValue(item);
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}//else//
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return result;
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}//itemToImage()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#registerItem(java.lang.Object)
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*/
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protected void registerItem(Object item) {
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itemText.registerItem(item, null);
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itemImage.registerItem(item, null);
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super.registerItem(item);
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}//registerItem()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#unregisterItem(java.lang.Object)
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*/
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protected void unregisterItem(Object item) {
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itemText.unregisterItem(item);
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itemImage.unregisterItem(item);
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super.unregisterItem(item);
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}//unregisterItem()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#unregisterItems()
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*/
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protected void unregisterItems() {
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itemText.unregisterAllItems();
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itemImage.unregisterAllItems();
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super.unregisterItems();
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}//unregisterItems()//
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/* (non-Javadoc)
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* @see org.eclipse.swt.events.SelectionListener#widgetDefaultSelected(org.eclipse.swt.events.SelectionEvent)
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*/
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public void widgetDefaultSelected(SelectionEvent e) {
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widgetSelected(e);
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}//widgetDefaultSelected()//
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/* (non-Javadoc)
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* @see org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse.swt.events.SelectionEvent)
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*/
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public void widgetSelected(SelectionEvent e) {
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updateSelectionLinks();
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if(getAutoSynchronizeSelection()) {
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if(getAutoSynchronizeSelectionDelay() > 0) {
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//Start a task to send the selection to the server after a short delay. This will reduce the overhead of auto synchronizing the selection.//
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synchronized(this) {
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if(autoSynchronizeSelectionTask != null) {
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removeTask(autoSynchronizeSelectionTask);
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}//if//
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autoSynchronizeSelectionTask = new Task() {
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public void execute() {
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//Make sure that this task is still valid and is not being superceeded.//
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synchronized(ComboBox.this) {
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if(autoSynchronizeSelectionTask == this) {
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//Cleanup after the task.//
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autoSynchronizeSelectionTask = null;
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getEventLoop().executeAsync(new IRunnable() {
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public Object run() {
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synchronizeSelection();
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if(getAutoValidate()) {
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postSynchronizeValidate();
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}//if//
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return null;
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}//run()//
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});
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}//if//
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}//synchronized//
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}//run()//
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};
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addTask(autoSynchronizeSelectionTask, getAutoSynchronizeSelectionDelay());
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}//synchronized//
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}//if//
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else {
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synchronizeSelection();
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if(getAutoValidate()) {
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postSynchronizeValidate();
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}//if//
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}//else//
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}//if//
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}//widgetSelected()//
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/* (non-Javadoc)
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* @see org.eclipse.swt.events.ModifyListener#modifyText(org.eclipse.swt.events.ModifyEvent)
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*/
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public void modifyText(ModifyEvent event) {
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if(!suspendSelectionEvents) {
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if(controlGetSelection() == -1) {
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widgetSelected(null);
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}//if//
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}//if//
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}//modifyText()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlRemoveAll()
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*/
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protected void controlRemoveAll() {
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getSwtCombo().removeAll();
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}//controlRemoveAll()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlSetItems(String[])
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*/
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protected void controlSetItems(Object[] items) {
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String[] itemTexts = new String[items.length];
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for(int index = 0; index < itemTexts.length; index++) {
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itemTexts[index] = items[index] == null ? "" : items[index].toString();
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}//for//
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suspendSelectionEvents = true;
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try {
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getSwtCombo().setItems(itemTexts);
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}//try//
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finally {
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suspendSelectionEvents = false;
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}//finally//
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}//controlSetItems()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlSetItem(int, String)
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*/
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protected void controlSetItem(int index, Object itemData) {
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suspendSelectionEvents = true;
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try {
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getSwtCombo().setItem(index, (String) itemData);
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}//try//
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finally {
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suspendSelectionEvents = false;
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}//finally//
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}//controlSetItem()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlAddItem(String, int)
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*/
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protected void controlAddItem(Object itemData, int index) {
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suspendSelectionEvents = true;
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try {
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getSwtCombo().add((String) itemData, index);
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}//try//
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finally {
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suspendSelectionEvents = false;
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}//finally//
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}//controlAddItem()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlAddItem(String)
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*/
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protected void controlAddItem(Object itemData) {
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suspendSelectionEvents = true;
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try {
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getSwtCombo().add((String) itemData);
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}//try//
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finally {
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suspendSelectionEvents = false;
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}//finally//
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}//controlAddItem()//
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|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlRemoveItem(int)
|
||
|
|
*/
|
||
|
|
protected void controlRemoveItem(int index) {
|
||
|
|
suspendSelectionEvents = true;
|
||
|
|
|
||
|
|
try {
|
||
|
|
getSwtCombo().remove(index);
|
||
|
|
}//try//
|
||
|
|
finally {
|
||
|
|
suspendSelectionEvents = false;
|
||
|
|
}//finally//
|
||
|
|
}//controlRemoveItem()//
|
||
|
|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlGetSelections()
|
||
|
|
*/
|
||
|
|
protected int[] controlGetSelections() {
|
||
|
|
//return getSwtCombo().getSelectionIndices();
|
||
|
|
throw new RuntimeException("Method not supported - controlGetSelections");
|
||
|
|
}//controlGetSelections()//
|
||
|
|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlGetSelection()
|
||
|
|
*/
|
||
|
|
protected int controlGetSelection() {
|
||
|
|
return getSwtCombo().getSelectionIndex();
|
||
|
|
}//controlGetSelection()//
|
||
|
|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlSetSelections()
|
||
|
|
*/
|
||
|
|
protected void controlSetSelections(int[] indices) {
|
||
|
|
//getSwtCombo().setSelection(indices);
|
||
|
|
throw new RuntimeException("Method not supported - controlSetSelections");
|
||
|
|
}//controlSetSelections()//
|
||
|
|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlSetSelection()
|
||
|
|
*/
|
||
|
|
protected void controlSetSelection(int index) {
|
||
|
|
if(getSwtCombo().getSelectionIndex() != index) {
|
||
|
|
suspendSelectionEvents = true;
|
||
|
|
|
||
|
|
try {
|
||
|
|
if(index == -1) {
|
||
|
|
getSwtCombo().deselectAll();
|
||
|
|
}//if//
|
||
|
|
else {
|
||
|
|
getSwtCombo().select(index);
|
||
|
|
}//else//
|
||
|
|
}//try//
|
||
|
|
finally {
|
||
|
|
suspendSelectionEvents = false;
|
||
|
|
}//finally//
|
||
|
|
}//if//
|
||
|
|
}//controlSetSelection()//
|
||
|
|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlAddSelection()
|
||
|
|
*/
|
||
|
|
protected void controlAddSelection(int index) {
|
||
|
|
//getSwtCombo().select(index);
|
||
|
|
throw new RuntimeException("Method not supported - controlAddSelection");
|
||
|
|
}//controlAddSelection()//
|
||
|
|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlRemoveSelection()
|
||
|
|
*/
|
||
|
|
protected void controlRemoveSelection(int index) {
|
||
|
|
suspendSelectionEvents = true;
|
||
|
|
|
||
|
|
try {
|
||
|
|
getSwtCombo().deselect(index);
|
||
|
|
}//try//
|
||
|
|
finally {
|
||
|
|
suspendSelectionEvents = false;
|
||
|
|
}//finally//
|
||
|
|
}//controlRemoveSelection()//
|
||
|
|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlRemoveAllSelections()
|
||
|
|
*/
|
||
|
|
protected void controlRemoveAllSelections() {
|
||
|
|
suspendSelectionEvents = true;
|
||
|
|
|
||
|
|
try {
|
||
|
|
getSwtCombo().deselectAll();
|
||
|
|
}//try//
|
||
|
|
finally {
|
||
|
|
suspendSelectionEvents = false;
|
||
|
|
}//finally//
|
||
|
|
}//controlRemoveAllSelections()//
|
||
|
|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlIsSelected()
|
||
|
|
*/
|
||
|
|
protected boolean controlIsSelected(int index) {
|
||
|
|
return getSwtCombo().getSelectionIndex() == index;
|
||
|
|
}//controlIsSelected()//
|
||
|
|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlGetText()
|
||
|
|
*/
|
||
|
|
protected String controlGetText() {
|
||
|
|
return getSwtCombo().getText();
|
||
|
|
}//controlGetText()//
|
||
|
|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlSetCustomItem(Object)
|
||
|
|
*/
|
||
|
|
protected void controlSetCustomItem(Object item) {
|
||
|
|
suspendSelectionEvents = true;
|
||
|
|
|
||
|
|
try {
|
||
|
|
if(item == null) {
|
||
|
|
getSwtCombo().deselectAll();
|
||
|
|
}//if//
|
||
|
|
else {
|
||
|
|
getSwtCombo().deselectAll();
|
||
|
|
getSwtCombo().setText(item.toString());
|
||
|
|
}//else//
|
||
|
|
}//try//
|
||
|
|
finally {
|
||
|
|
suspendSelectionEvents = false;
|
||
|
|
}//finally//
|
||
|
|
}//controlSetCustomItem()//
|
||
|
|
/* (non-Javadoc)
|
||
|
|
* @see com.foundation.view.swt.CollectionComponent#controlGetSelectionCount()
|
||
|
|
*/
|
||
|
|
protected int controlGetSelectionCount() {
|
||
|
|
return getSwtCombo().getText().length() > 0 ? 1 : 0;
|
||
|
|
}//controlGetSelectionCount()//
|
||
|
|
/**
|
||
|
|
* Forces the selection event handler to be called.
|
||
|
|
*/
|
||
|
|
protected void forceSelectionEvent() { //Should call widgetSelected implemented by the subclass. This name may need to change.//
|
||
|
|
widgetSelected(null);
|
||
|
|
}//forceSelectionEvent()//
|
||
|
|
}//ComboBox//
|