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/*
@VaadinApache2LicenseForJavaFiles@
*/
package com.vaadin.terminal.gwt.client.ui.optiongroup;
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.UIDL;
import com.vaadin.terminal.gwt.client.ui.Field;
import com.vaadin.terminal.gwt.client.ui.nativebutton.VNativeButton;
import com.vaadin.terminal.gwt.client.ui.textfield.VTextField;
public abstract class VOptionGroupBase extends Composite implements Field,
ClickHandler, ChangeHandler, KeyPressHandler, Focusable {
public static final String CLASSNAME_OPTION = "v-select-option";
protected ApplicationConnection client;
protected String paintableId;
protected Set<String> selectedKeys;
protected boolean immediate;
protected boolean multiselect;
protected boolean disabled;
protected boolean readonly;
protected int cols = 0;
protected int rows = 0;
protected boolean nullSelectionAllowed = true;
protected 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
*/
protected final Panel container;
protected VTextField newItemField;
protected 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;
}
abstract protected void setTabIndex(int tabIndex);
public void onClick(ClickEvent event) {
if (event.getSource() == newItemButton
&& !newItemField.getText().equals("")) {
client.updateVariable(paintableId, "newitem",
newItemField.getText(), true);
newItemField.setText("");
}
}
public void onChange(ChangeEvent event) {
if (multiselect) {
client.updateVariable(paintableId, "selected", getSelectedItems(),
immediate);
} else {
client.updateVariable(paintableId, "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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