Java/GWT/MouseListener
implements SourcesMouseEvents
<source lang="java">
package com.jexp.gwt.client; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.user.client.DOM; import com.google.gwt.user.client.Event; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.CheckBox; import com.google.gwt.user.client.ui.ClickListener; import com.google.gwt.user.client.ui.Grid; import com.google.gwt.user.client.ui.KeyboardListenerAdapter; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.ListBox; import com.google.gwt.user.client.ui.MouseListener; import com.google.gwt.user.client.ui.MouseListenerCollection; import com.google.gwt.user.client.ui.RadioButton; import com.google.gwt.user.client.ui.SourcesMouseEvents; import com.google.gwt.user.client.ui.TextArea; import com.google.gwt.user.client.ui.TextBox; import com.google.gwt.user.client.ui.VerticalPanel; import com.google.gwt.user.client.ui.Widget; import com.google.gwt.user.client.ui.RootPanel; import com.google.gwt.user.client.ui.MouseListenerAdapter; import com.google.gwt.user.client.rpc.IsSerializable; public class GWTClient implements EntryPoint{
public void onModuleLoad() {
final UserWidget userWidget = new UserWidget();
userWidget.addMouseListener(new MouseListenerAdapter() {
public void onMouseEnter(Widget sender)
{
userWidget.addStyleName("userWidget-focus");
}
public void onMouseLeave(Widget sender)
{
userWidget.removeStyleName("userWidget-focus");
}
});
RootPanel.get().add(userWidget);
}
} class UserWidget extends VerticalPanel implements SourcesMouseEvents {
TextBox firstName = new TextBox();
TextBox lastName = new TextBox();
TextBox address = new TextBox();
TextBox city = new TextBox();
TextBox postalCode = new TextBox();
ListBox country = new ListBox();
ListBox stateProvince = new ListBox();
TextArea comments = new TextArea();
CheckBox sendMeSpam = new CheckBox();
RadioButton htmlSpam = new RadioButton("radioGroup", "HTML");
RadioButton textSpam = new RadioButton("radioGroup", "Plain Text");
Grid table = new Grid(11, 2);
Button submit = new Button("Submit");
User user = new User();
MouseListenerCollection listeners;
public UserWidget() {
super();
this.setStyleName("userWidget");
postalCode.addKeyboardListener(new KeyboardListenerAdapter() {
public void onKeyPress(Widget sender, char keyCode,
int modifiers) {
if (!Character.isDigit(keyCode)) {
((TextBox) sender).cancelKey();
}
}
});
country.addItem("United States", "US");
stateProvince.addItem("Alabama", "AL");
stateProvince.addItem("Alaska", "AK");
stateProvince.addItem("American Samoa", "AS");
htmlSpam.setChecked(true);
VerticalPanel spamChoicePanel = new VerticalPanel();
spamChoicePanel.add(htmlSpam);
spamChoicePanel.add(textSpam);
submit.addClickListener(new ClickListener() {
public void onClick(Widget sender) {
user.firstName = firstName.getText();
user.lastName = lastName.getText();
user.address = address.getText();
user.city = city.getText();
user.postalCode = postalCode.getText();
user.country = country.getValue(country.getSelectedIndex());
user.stateProvince = stateProvince.getValue(stateProvince.getSelectedIndex());
user.ruments = comments.getText();
user.sendMeSpam = sendMeSpam.isChecked();
if (htmlSpam.isChecked()) {
user.htmlSpam = true;
}
Window.alert("User is currently set as - \n" +
user.toString());
}
});
table.setWidget(0, 0, new Label("First Name"));
table.setWidget(0, 1, firstName);
table.setWidget(1, 0, new Label("Last Name"));
table.setWidget(1, 1, lastName);
table.setWidget(2, 0, new Label("Address"));
table.setWidget(2, 1, address);
table.setWidget(3, 0, new Label("City"));
table.setWidget(3, 1, city);
table.setWidget(4, 0, new Label("State/Province"));
table.setWidget(4, 1, stateProvince);
table.setWidget(5, 0, new Label("PostalCode/Zip"));
table.setWidget(5, 1, postalCode);
table.setWidget(6, 0, new Label("Country"));
table.setWidget(6, 1, country);
table.setWidget(7, 0, new Label("Comments"));
table.setWidget(7, 1, comments);
table.setWidget(8, 0, new Label("Sign Up For Our Email List!"));
table.setWidget(8, 1, sendMeSpam);
table.setWidget(9, 0, new Label("Email Format:"));
table.setWidget(9, 1, spamChoicePanel);
table.setWidget(10, 0, submit);
table.setWidget(10, 1, null);
Label label = new Label("Enter User Information");
this.add(label);
this.add(table);
sinkEvents(Event.MOUSEEVENTS);
}
public void onBrowserEvent(Event event) {
int eventType = DOM.eventGetType(event);
switch (eventType) {
case Event.ONMOUSEOVER:
if (listeners != null) {
listeners.fireMouseEnter(this);
}
break;
case Event.ONMOUSEOUT:
if (listeners != null) {
listeners.fireMouseLeave(this);
}
break;
}
}
public void addMouseListener(MouseListener listener) {
if (listeners == null) {
listeners = new MouseListenerCollection();
}
listeners.add(listener);
}
public void removeMouseListener(MouseListener listener) {
if (listeners != null) {
listeners.remove(listener);
}
}
} class User implements IsSerializable {
String firstName;
String lastName;
String address;
String city;
String stateProvince;
String postalCode;
String country;
String comments;
boolean sendMeSpam;
boolean htmlSpam;
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append(" User:");
sb.append(" [firstName] " + firstName + "\n");
sb.append(" [lastName] " + lastName + "\n");
sb.append(" [address] " + address + "\n");
sb.append(" [city] " + city + "\n");
sb.append(" [stateProvince] " + stateProvince + "\n");
sb.append(" [postalCode] " + postalCode + "\n");
sb.append(" [country] " + country + "\n");
sb.append(" [comments] " + comments + "\n");
sb.append(" [sendMeSpam] " + sendMeSpam + "\n");
sb.append(" [htmlSpam] " + htmlSpam + "\n");
return sb.toString();
}
}
</source>
Work with mouse Listener
<source lang="java">
package com.jexp.gwt.client; import com.google.gwt.core.client.EntryPoint; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.ClickListener; import com.google.gwt.user.client.ui.Grid; import com.google.gwt.user.client.ui.KeyboardListener; import com.google.gwt.user.client.ui.KeyboardListenerAdapter; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.*; import com.google.gwt.user.client.ui.RootPanel; import com.google.gwt.user.client.ui.Widget;
public class GWTClient implements EntryPoint{
/**
* This is the entry point method.
*/
public void onModuleLoad() {
// Create Label widget
final Label roller = new Label("Default value");
// Associate HTML element to GWT widget
RootPanel.get().add(roller);
// Add mouse lister to label widget
roller.addMouseListener(new MouseListener() {
public void onMouseEnter(Widget sender) {
roller.setText("Entered element...");
}
public void onMouseLeave(Widget sender) {
roller.setText("Leaving element...");
}
// Do nothing
public void onMouseDown(Widget sender, int x, int y) {}
// Do nothing
public void onMouseMove(Widget sender, int x, int y) {}
// Do nothing
public void onMouseUp(Widget sender, int x, int y) {}
});
}
}
</source>
