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wcrisman
2014-05-30 10:31:51 -07:00
commit b45e56b890
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Foundation TCV SWT Client/src/com/foundation/tcv/swt/client/ComboBox.java Normal file
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/*
* Copyright (c) 2003,2009 Declarative Engineering LLC.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Declarative Engineering LLC
* verson 1 which accompanies this distribution, and is available at
* http://declarativeengineering.com/legal/DE_Developer_License_v1.txt
*/
package com.foundation.tcv.swt.client;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import com.common.thread.IRunnable;
import com.foundation.tcv.swt.*;
import com.foundation.tcv.swt.client.cell.CellComponent;
import com.foundation.tcv.view.*;
public class ComboBox extends IndexedCollectionComponent implements SelectionListener, IComboBox, ModifyListener {
/** Used to stop selection events from being handled while the items are being changed. */
private boolean suspendSelectionEvents = false;
/**
* ComboBox constructor.
*/
public ComboBox() {
super();
}//ComboBox()//
/**
* Gets the SWT combo that represents this combo box.
* @return The SWT combo providing visualization for this combo box.
*/
public org.eclipse.swt.widgets.Combo getSwtCombo() {
return (org.eclipse.swt.widgets.Combo) getSwtWidget();
}//getSwtCombo()//
/* (non-Javadoc)
* @see com.foundation.tcv.swt.client.AbstractComponent#internalViewInitialize()
*/
protected void internalViewInitialize() {
getSwtCombo().addSelectionListener(this);
getSwtCombo().addModifyListener(this);
super.internalViewInitialize();
}//internalViewInitialize()//
/* (non-Javadoc)
* @see com.foundation.tcv.swt.client.AbstractComponent#internalViewRelease()
*/
protected void internalViewRelease() {
if((getSwtCombo() != null) && (!getSwtCombo().isDisposed())) {
getSwtCombo().removeSelectionListener(this);
getSwtCombo().removeModifyListener(this);
}//if//
super.internalViewRelease();
}//internalViewRelease()//
/* (non-Javadoc)
* @see com.foundation.tcv.swt.client.AbstractComponent#internalProcessMessage(com.foundation.tcv.model.ViewMessage)
*/
public Object internalProcessMessage(ViewMessage viewMessage) {
Object retVal = null;
switch(viewMessage.getMessageNumber()) {
case MESSAGE_INITIALIZE: {
if(getSwtControl() == null) {
int[] data = (int[]) viewMessage.getMessageData();
int style = data[1];
//Link to the parent container.//
setContainer((Container) getComponent(data[0]));
getContainer().addComponent(this);
//Create the SWT widget.//
setSwtWidget(new org.eclipse.swt.widgets.Combo(getContainer().getSwtParent(), style));
getSwtWidget().setData(this);
//Set the allows user items flag.//
setAllowUserItems(!((style & SWT.READ_ONLY) > 0));
//If the container has already been initialized then force the parent to re-layout so that this component will appear.//
if(getContainer().isInitialized()) {
getContainer().getSwtComposite().layout(true, true);
}//if//
}//if//
break;
}//case//
case MESSAGE_SET_TEXT_LIMIT: {
getSwtCombo().setTextLimit(((Integer) viewMessage.getMessageData()).intValue());
break;
}//case//
default: {
retVal = super.internalProcessMessage(viewMessage);
}//default//
}//switch//
return retVal;
}//internalProcessMessage()//
/* (non-Javadoc)
* @see org.eclipse.swt.events.SelectionListener#widgetDefaultSelected(org.eclipse.swt.events.SelectionEvent)
*/
public void widgetDefaultSelected(SelectionEvent event) {
widgetSelected(event);
}//widgetDefaultSelected()//
/* (non-Javadoc)
* @see org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse.swt.events.SelectionEvent)
*/
public void widgetSelected(SelectionEvent event) {
updateSelectionLinks();
if(getAutoSynchronizeSelection()) {
if(getAutoSynchronizeSelectionDelay() > 0) {
//TODO: Multiple selections are never allowed for a combo...
int[] selectedObjectIds = getAllowMultiSelection() ? getSelectedObjectIds() : null;
int selectedObjectId = !getAllowMultiSelection() && !hasCustomSelection() ? getSelectedObjectId() : -1;
String customSelection = !getAllowMultiSelection() && hasCustomSelection() ? controlGetText() : null;
if((selectedObjectIds != null) || ((customSelection != null) && (!customSelection.equals(getCustomSelectionOnServer()))) || (selectedObjectId != getSelectedObjectIdOnServer())) {
final Object selection = customSelection != null ? (Object) customSelection : selectedObjectIds != null ? (Object) selectedObjectIds : selectedObjectId != -1 ? new Integer(selectedObjectId) : null;
//Update the known server state.//
if(selectedObjectIds == null) {
setSelectedObjectIdOnServer(selectedObjectId);
setCustomSelectionOnServer(customSelection);
}//if//
//Start a task to send the selection to the server after a short delay. This will reduce the overhead of auto synchronizing the selection.//
synchronized(this) {
if(autoSynchronizeSelectionTask != null) {
removeTask(autoSynchronizeSelectionTask);
}//if//
autoSynchronizeSelectionTask = new Task() {
public void execute() {
//Make sure that this task is still valid and is not being superceeded.//
synchronized(ComboBox.this) {
if(autoSynchronizeSelectionTask == this) {
//Cleanup after the task.//
autoSynchronizeSelectionTask = null;
getEventLoop().executeAsync(new IRunnable() {
public Object run() {
sendMessage(MESSAGE_VIEW_SYNCHRONIZE_SELECTION, selection);
return null;
}//run()//
});
}//if//
}//synchronized//
}//run()//
};
addTask(autoSynchronizeSelectionTask, getAutoSynchronizeSelectionDelay());
}//synchronized//
}//if//
}//if//
else {
synchronizeSelection();
}//else//
}//if//
}//widgetSelected()//
/* (non-Javadoc)
* @see org.eclipse.swt.events.ModifyListener#modifyText(org.eclipse.swt.events.ModifyEvent)
*/
public void modifyText(ModifyEvent event) {
if(!suspendSelectionEvents) {
//TODO: Should we remove this if block? Shouldn't widgetSelected(null) be called regardless?
if(controlGetSelection() == -1) {
widgetSelected(null);
}//if//
}//if//
}//modifyText()//
/* (non-Javadoc)
* @see com.foundation.view.swt.CollectionComponent#controlRemoveAll()
*/
protected void controlRemoveAll() {
suspendSelectionEvents = true;
try {
getSwtCombo().removeAll();
}//try//
finally {
suspendSelectionEvents = false;
}//finally//
}//controlRemoveAll()//
/* (non-Javadoc)
* @see com.foundation.view.swt.CollectionComponent#controlSetItems(String[])
*/
protected void controlSetItems(Object[] items) {
String[] itemTexts = new String[items.length];
System.arraycopy(items, 0, itemTexts, 0, itemTexts.length);
suspendSelectionEvents = true;
try {
getSwtCombo().setItems(itemTexts);
}//try//
finally {
suspendSelectionEvents = false;
}//finally//
}//controlSetItems()//
/* (non-Javadoc)
* @see com.foundation.view.swt.CollectionComponent#controlSetItem(int, Object)
*/
protected void controlSetItem(int index, Object itemData) {
suspendSelectionEvents = true;
try {
getSwtCombo().setItem(index, (String) itemData);
}//try//
finally {
suspendSelectionEvents = false;
}//finally//
}//controlSetItem()//
/* (non-Javadoc)
* @see com.foundation.view.swt.CollectionComponent#controlAddItem(Object, int)
*/
protected void controlAddItem(Object itemData, int index) {
suspendSelectionEvents = true;
try {
getSwtCombo().add((String) itemData, index);
}//try//
finally {
suspendSelectionEvents = false;
}//finally//
}//controlAddItem()//
/* (non-Javadoc)
* @see com.foundation.view.swt.CollectionComponent#controlAddItem(Object)
*/
protected void controlAddItem(Object itemData) {
suspendSelectionEvents = true;
try {
getSwtCombo().add((String) itemData);
}//try//
finally {
suspendSelectionEvents = false;
}//finally//
}//controlAddItem()//
/* (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) {
suspendSelectionEvents = true;
try {
if(index == -1) {
getSwtCombo().deselectAll();
}//if//
else {
getSwtCombo().select(index);
}//else//
}//try//
finally {
suspendSelectionEvents = false;
}//finally//
}//controlSetSelection()//
/* (non-Javadoc)
* @see com.foundation.tcv.swt.client.IndexedCollectionComponent#controlSetSelection(java.lang.String)
*/
protected void controlSetSelection(String text) {
suspendSelectionEvents = true;
try {
if(text == null) {
getSwtCombo().deselectAll();
}//if//
else {
getSwtCombo().deselectAll();
getSwtCombo().setText(text);
}//else//
}//try//
finally {
suspendSelectionEvents = false;
}//finally//
}//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;
getSwtCombo().deselectAll();
suspendSelectionEvents = false;
}//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#controlSetText(String)
*/
protected void controlSetText(String text) {
suspendSelectionEvents = true;
if(text == null) {
getSwtCombo().deselectAll();
}//if//
else {
getSwtCombo().setText(text);
}//else//
suspendSelectionEvents = false;
}//controlSetText()//
/* (non-Javadoc)
* @see com.foundation.tcv.swt.client.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()//
/* (non-Javadoc)
* @see com.foundation.tcv.swt.client.ICellContainer#addComponent(com.foundation.tcv.swt.client.cell.CellComponent)
*/
public void addComponent(CellComponent component) {
//Never used.//
}//addComponent()//
}//ComboBox//