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/*
@VaadinApache2LicenseForJavaFiles@
*/
package com.vaadin.terminal.gwt.client.ui;
import java.util.Set;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Panel;
import com.google.gwt.user.client.ui.Widget;
import com.vaadin.terminal.gwt.client.ApplicationConnection;
import com.vaadin.terminal.gwt.client.Focusable;
import com.vaadin.terminal.gwt.client.Paintable;
import com.vaadin.terminal.gwt.client.UIDL;
abstract class VOptionGroupBase extends Composite implements Paintable, Field,
ClickHandler, ChangeHandler, KeyPressHandler, Focusable {
public static final String CLASSNAME_OPTION = "v-select-option";
protected ApplicationConnection client;
protected String id;
protected Set<String> selectedKeys;
private boolean immediate;
private boolean multiselect;
private boolean disabled;
private boolean readonly;
private int cols = 0;
private int rows = 0;
private boolean nullSelectionAllowed = true;
private boolean nullSelectionItemAvailable = false;
/**
* Widget holding the different options (e.g. ListBox or Panel for radio
* buttons) (optional, fallbacks to container Panel)
*/
protected Widget optionsContainer;
/**
* Panel containing the component
*/
private final Panel container;
private VTextField newItemField;
private VNativeButton newItemButton;
public VOptionGroupBase(String classname) {
container = new FlowPanel();
initWidget(container);
optionsContainer = container;
container.setStyleName(classname);
immediate = false;
multiselect = false;
}
/*
* Call this if you wish to specify your own container for the option
* elements (e.g. SELECT)
*/
public VOptionGroupBase(Widget w, String classname) {
this(classname);
optionsContainer = w;
container.add(optionsContainer);
}
protected boolean isImmediate() {
return immediate;
}
protected boolean isMultiselect() {
return multiselect;
}
protected boolean isDisabled() {
return disabled;
}
protected boolean isReadonly() {
return readonly;
}
protected boolean isNullSelectionAllowed() {
return nullSelectionAllowed;
}
protected boolean isNullSelectionItemAvailable() {
return nullSelectionItemAvailable;
}
/**
* @return "cols" specified in uidl, 0 if not specified
*/
protected int getColumns() {
return cols;
}
/**
* @return "rows" specified in uidl, 0 if not specified
*/
protected int getRows() {
return rows;
}
public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {
this.client = client;
id = uidl.getId();
if (client.updateComponent(this, uidl, true)) {
return;
}
selectedKeys = uidl.getStringArrayVariableAsSet("selected");
readonly = uidl.getBooleanAttribute("readonly");
disabled = uidl.getBooleanAttribute("disabled");
multiselect = "multi".equals(uidl.getStringAttribute("selectmode"));
immediate = uidl.getBooleanAttribute("immediate");
nullSelectionAllowed = uidl.getBooleanAttribute("nullselect");
nullSelectionItemAvailable = uidl.getBooleanAttribute("nullselectitem");
if (uidl.hasAttribute("cols")) {
cols = uidl.getIntAttribute("cols");
}
if (uidl.hasAttribute("rows")) {
rows = uidl.getIntAttribute("rows");
}
final UIDL ops = uidl.getChildUIDL(0);
if (getColumns() > 0) {
container.setWidth(getColumns() + "em");
if (container != optionsContainer) {
optionsContainer.setWidth("100%");
}
}
buildOptions(ops);
if (uidl.getBooleanAttribute("allownewitem")) {
if (newItemField == null) {
newItemButton = new VNativeButton();
newItemButton.setText("+");
newItemButton.addClickHandler(this);
newItemField = new VTextField();
newItemField.addKeyPressHandler(this);
}
newItemField.setEnabled(!disabled && !readonly);
newItemButton.setEnabled(!disabled && !readonly);
if (newItemField == null || newItemField.getParent() != container) {
container.add(newItemField);
container.add(newItemButton);
final int w = container.getOffsetWidth()
- newItemButton.getOffsetWidth();
newItemField.setWidth(Math.max(w, 0) + "px");
}
} else if (newItemField != null) {
container.remove(newItemField);
container.remove(newItemButton);
}
setTabIndex(uidl.hasAttribute("tabindex") ? uidl
.getIntAttribute("tabindex") : 0);
}
abstract protected void setTabIndex(int tabIndex);
public void onClick(ClickEvent event) {
if (event.getSource() == newItemButton
&& !newItemField.getText().equals("")) {
client.updateVariable(id, "newitem", newItemField.getText(), true);
newItemField.setText("");
}
}
public void onChange(ChangeEvent event) {
if (multiselect) {
client.updateVariable(id, "selected", getSelectedItems(), immediate);
} else {
client.updateVariable(id, "selected", new String[] { ""
+ getSelectedItem() }, immediate);
}
}
public void onKeyPress(KeyPressEvent event) {
if (event.getSource() == newItemField
&& event.getCharCode() == KeyCodes.KEY_ENTER) {
newItemButton.click();
}
}
protected abstract void buildOptions(UIDL uidl);
protected abstract String[] getSelectedItems();
protected String getSelectedItem() {
final String[] sel = getSelectedItems();
if (sel.length > 0) {
return sel[0];
} else {
return null;
}
}
}
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