374 lines
12 KiB
Java
374 lines
12 KiB
Java
/*
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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.tcv.swt.client;
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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.foundation.tcv.swt.*;
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import com.foundation.tcv.swt.client.cell.CellComponent;
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import com.foundation.tcv.view.*;
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public class ComboBox extends IndexedCollectionComponent implements SelectionListener, IComboBox, ModifyListener {
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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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*/
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public ComboBox() {
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super();
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}//ComboBox()//
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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) getSwtWidget();
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}//getSwtCombo()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.client.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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super.internalViewInitialize();
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}//internalViewInitialize()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.client.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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}//internalViewRelease()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.client.AbstractComponent#internalProcessMessage(com.foundation.tcv.model.ViewMessage)
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*/
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public Object internalProcessMessage(ViewMessage viewMessage) {
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Object retVal = null;
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switch(viewMessage.getMessageNumber()) {
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case MESSAGE_INITIALIZE: {
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if(getSwtControl() == null) {
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int[] data = (int[]) viewMessage.getMessageData();
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int style = data[1];
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//Link to the parent container.//
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setContainer((Container) getComponent(data[0]));
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getContainer().addComponent(this);
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//Create the SWT widget.//
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setSwtWidget(new org.eclipse.swt.widgets.Combo(getContainer().getSwtParent(), style));
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getSwtWidget().setData(this);
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//Set the allows user items flag.//
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setAllowUserItems(!((style & SWT.READ_ONLY) > 0));
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//If the container has already been initialized then force the parent to re-layout so that this component will appear.//
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if(getContainer().isInitialized()) {
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getContainer().getSwtComposite().layout(true, true);
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}//if//
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}//if//
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break;
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}//case//
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case MESSAGE_SET_TEXT_LIMIT: {
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getSwtCombo().setTextLimit(((Integer) viewMessage.getMessageData()).intValue());
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break;
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}//case//
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default: {
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retVal = super.internalProcessMessage(viewMessage);
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}//default//
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}//switch//
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return retVal;
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}//internalProcessMessage()//
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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 event) {
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widgetSelected(event);
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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 event) {
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updateSelectionLinks();
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if(getAutoSynchronizeSelection()) {
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if(getAutoSynchronizeSelectionDelay() > 0) {
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//TODO: Multiple selections are never allowed for a combo...
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int[] selectedObjectIds = getAllowMultiSelection() ? getSelectedObjectIds() : null;
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int selectedObjectId = !getAllowMultiSelection() && !hasCustomSelection() ? getSelectedObjectId() : -1;
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String customSelection = !getAllowMultiSelection() && hasCustomSelection() ? controlGetText() : null;
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if((selectedObjectIds != null) || ((customSelection != null) && (!customSelection.equals(getCustomSelectionOnServer()))) || (selectedObjectId != getSelectedObjectIdOnServer())) {
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final Object selection = customSelection != null ? (Object) customSelection : selectedObjectIds != null ? (Object) selectedObjectIds : selectedObjectId != -1 ? new Integer(selectedObjectId) : null;
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//Update the known server state.//
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if(selectedObjectIds == null) {
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setSelectedObjectIdOnServer(selectedObjectId);
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setCustomSelectionOnServer(customSelection);
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}//if//
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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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sendMessage(MESSAGE_VIEW_SYNCHRONIZE_SELECTION, selection);
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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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}//if//
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else {
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synchronizeSelection();
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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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//TODO: Should we remove this if block? Shouldn't widgetSelected(null) be called regardless?
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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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suspendSelectionEvents = true;
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try {
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getSwtCombo().removeAll();
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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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}//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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System.arraycopy(items, 0, itemTexts, 0, itemTexts.length);
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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, Object)
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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(Object, 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(Object)
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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)
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* @see com.foundation.view.swt.CollectionComponent#controlRemoveItem(int)
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*/
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protected void controlRemoveItem(int index) {
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suspendSelectionEvents = true;
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try {
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getSwtCombo().remove(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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}//controlRemoveItem()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlGetSelections()
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*/
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protected int[] controlGetSelections() {
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//return getSwtCombo().getSelectionIndices();
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throw new RuntimeException("Method not supported - controlGetSelections");
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}//controlGetSelections()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlGetSelection()
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*/
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protected int controlGetSelection() {
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return getSwtCombo().getSelectionIndex();
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}//controlGetSelection()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlSetSelections()
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*/
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protected void controlSetSelections(int[] indices) {
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//getSwtCombo().setSelection(indices);
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throw new RuntimeException("Method not supported - controlSetSelections");
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}//controlSetSelections()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlSetSelection()
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*/
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protected void controlSetSelection(int index) {
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suspendSelectionEvents = true;
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try {
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if(index == -1) {
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getSwtCombo().deselectAll();
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}//if//
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else {
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getSwtCombo().select(index);
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}//else//
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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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}//controlSetSelection()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.client.IndexedCollectionComponent#controlSetSelection(java.lang.String)
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*/
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protected void controlSetSelection(String text) {
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suspendSelectionEvents = true;
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try {
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if(text == null) {
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getSwtCombo().deselectAll();
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}//if//
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else {
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getSwtCombo().deselectAll();
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getSwtCombo().setText(text);
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}//else//
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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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}//controlSetSelection()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlAddSelection()
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*/
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protected void controlAddSelection(int index) {
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//getSwtCombo().select(index);
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throw new RuntimeException("Method not supported - controlAddSelection");
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}//controlAddSelection()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlRemoveSelection()
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*/
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protected void controlRemoveSelection(int index) {
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suspendSelectionEvents = true;
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try {
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getSwtCombo().deselect(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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}//controlRemoveSelection()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlRemoveAllSelections()
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*/
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protected void controlRemoveAllSelections() {
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suspendSelectionEvents = true;
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getSwtCombo().deselectAll();
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suspendSelectionEvents = false;
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}//controlRemoveAllSelections()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlIsSelected()
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*/
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protected boolean controlIsSelected(int index) {
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return getSwtCombo().getSelectionIndex() == index;
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}//controlIsSelected()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlGetText()
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*/
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protected String controlGetText() {
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return getSwtCombo().getText();
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}//controlGetText()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.CollectionComponent#controlSetText(String)
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*/
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protected void controlSetText(String text) {
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suspendSelectionEvents = true;
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if(text == null) {
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getSwtCombo().deselectAll();
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}//if//
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else {
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getSwtCombo().setText(text);
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}//else//
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suspendSelectionEvents = false;
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}//controlSetText()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.client.CollectionComponent#controlGetSelectionCount()
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*/
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protected int controlGetSelectionCount() {
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return getSwtCombo().getText().length() > 0 ? 1 : 0;
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}//controlGetSelectionCount()//
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/**
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* Forces the selection event handler to be called.
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*/
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protected void forceSelectionEvent() { //Should call widgetSelected implemented by the subclass. This name may need to change.//
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widgetSelected(null);
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}//forceSelectionEvent()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.client.ICellContainer#addComponent(com.foundation.tcv.swt.client.cell.CellComponent)
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*/
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public void addComponent(CellComponent component) {
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//Never used.//
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}//addComponent()//
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}//ComboBox// |