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java.lang.Objectcom.google.gwt.user.client.ui.UIObject
com.google.gwt.user.client.ui.Widget
com.google.gwt.user.client.ui.FocusWidget
com.google.gwt.user.client.ui.TextBoxBase
com.google.gwt.user.client.ui.TextArea
A text box that allows multiple lines of text to be entered.
public class TextBoxExample implements EntryPoint {
public void onModuleLoad() {
// Make some text boxes. The password text box is identical to the text
// box, except that the input is visually masked by the browser.
PasswordTextBox ptb = new PasswordTextBox();
TextBox tb = new TextBox();
// Let's disallow non-numeric entry in the normal text box.
tb.addKeyboardListener(new KeyboardListenerAdapter() {
public void onKeyPress(Widget sender, char keyCode, int modifiers) {
if (!Character.isDigit(keyCode)) {
// TextBox.cancelKey() suppresses the current keyboard event.
((TextBox)sender).cancelKey();
}
}
});
// Let's make an 80x50 text area to go along with the other two.
TextArea ta = new TextArea();
ta.setCharacterWidth(80);
ta.setVisibleLines(50);
// Add them to the root panel.
VerticalPanel panel = new VerticalPanel();
panel.add(tb);
panel.add(ptb);
panel.add(ta);
RootPanel.get().add(panel);
}
}
| Nested Class Summary |
| Nested classes inherited from class com.google.gwt.user.client.ui.TextBoxBase |
TextBoxBase.TextAlignConstant |
| Field Summary |
| Fields inherited from class com.google.gwt.user.client.ui.TextBoxBase |
ALIGN_CENTER, ALIGN_JUSTIFY, ALIGN_LEFT, ALIGN_RIGHT |
| Constructor Summary | |
TextArea()
Creates an empty text area. |
|
| Method Summary | |
int |
getCharacterWidth()
Gets the requested width of the text box (this is not an exact value, as not all characters are created equal). |
int |
getCursorPos()
Gets the current position of the cursor (this also serves as the beginning of the text selection). |
int |
getSelectionLength()
Gets the length of the current text selection. |
int |
getVisibleLines()
Gets the number of text lines that are visible. |
void |
setCharacterWidth(int width)
Sets the requested width of the text box (this is not an exact value, as not all characters are created equal). |
void |
setSelectionRange(int pos,
int length)
Sets the range of text to be selected. |
void |
setVisibleLines(int lines)
Sets the number of text lines that are visible. |
| Methods inherited from class com.google.gwt.user.client.ui.TextBoxBase |
addChangeListener, addClickListener, addKeyboardListener, cancelKey, getImpl, getName, getSelectedText, getText, onBrowserEvent, removeChangeListener, removeClickListener, removeKeyboardListener, selectAll, setCursorPos, setKey, setName, setText, setTextAlignment |
| Methods inherited from class com.google.gwt.user.client.ui.FocusWidget |
addFocusListener, getTabIndex, isEnabled, removeFocusListener, setAccessKey, setEnabled, setFocus, setTabIndex |
| Methods inherited from class com.google.gwt.user.client.ui.Widget |
getParent, isAttached, onAttach, onDetach, onLoad, removeFromParent |
| Methods inherited from class com.google.gwt.user.client.ui.UIObject |
addStyleName, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleName, getTitle, isVisible, isVisible, removeStyleName, setElement, setHeight, setPixelSize, setSize, setStyleName, setStyleName, setTitle, setVisible, setVisible, setWidth, sinkEvents, toString, unsinkEvents |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
public TextArea()
| Method Detail |
public int getCharacterWidth()
public int getCursorPos()
TextBoxBase
getCursorPos in class TextBoxBasepublic int getSelectionLength()
TextBoxBase
getSelectionLength in class TextBoxBasepublic int getVisibleLines()
public void setCharacterWidth(int width)
width - the requested width, in characters
public void setSelectionRange(int pos,
int length)
TextBoxBase
setSelectionRange in class TextBoxBasepos - the position of the first character to be selectedlength - the number of characters to be selectedpublic void setVisibleLines(int lines)
lines - the number of visible lines
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