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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 |
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, isReadOnly, onBrowserEvent, removeChangeListener, removeClickListener, removeKeyboardListener, selectAll, setCursorPos, setKey, setName, setReadOnly, setSelectionRange, setText, setTextAlignment |
Methods inherited from class com.google.gwt.user.client.ui.FocusWidget |
addFocusListener, getFocusImpl, getTabIndex, isEnabled, removeFocusListener, setAccessKey, setElement, setEnabled, setFocus, setTabIndex |
Methods inherited from class com.google.gwt.user.client.ui.Widget |
getParent, isAttached, onAttach, onDetach, onLoad, onUnload, removeFromParent |
Methods inherited from class com.google.gwt.user.client.ui.UIObject |
addStyleName, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleElement, getStyleName, getTitle, isVisible, isVisible, removeStyleName, resetStyleName, 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 TextBoxBase
public int getSelectionLength()
TextBoxBase
getSelectionLength
in class TextBoxBase
public int getVisibleLines()
public void setCharacterWidth(int width)
width
- the requested width, in characterspublic void setVisibleLines(int lines)
lines
- the number of visible lines
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