textfield.java

j2me polish学习的经典代码

		private ItemCommandListener additionalItemCommandListener;
	//#endif

	// this is outside of the tmp.directInput block, so that it can be referenced from the UiAccess class
	int inputMode; // the current input mode		
	//#if tmp.directInput
		//#if tmp.supportsSymbolEntry
			private static List symbolsList;
			//#if polish.TextField.Symbols:defined
				//#= private static String definedSymbols = "${ escape(polish.TextField.Symbols)}"; 
			//#else
				private static String definedSymbols = "@/\\<>().,-_:\"";
			//#endif
			//#ifdef polish.i18n.useDynamicTranslations
		  		private static Command ENTER_SYMBOL_CMD = new Command( Locale.get("polish.command.entersymbol"), Command.ITEM, 3 );
			//#elifdef polish.command.entersymbol:defined
				//#= private static final Command ENTER_SYMBOL_CMD = new Command( "${polish.command.entersymbol}", Command.ITEM, 3 );
			//#else
				//# private static final Command ENTER_SYMBOL_CMD = new Command( "Add Symbol", Command.ITEM, 3 ); 
			//#endif
		//#endif
  		//#ifdef polish.css.text-wrap
		  	private int currentXOffset; // used for scrolling to the correct position when text-wrapping is deactivated
		//#endif
		private boolean isKeyDown;
		//#ifdef polish.TextField.InputTimeout:defined
			//#= private static final int INPUT_TIMEOUT = ${polish.TextField.InputTimeout};  
		//#else
			private static final int INPUT_TIMEOUT = 1000;
		//#endif
		private static final int MODE_LOWERCASE = 0;
		private static final int MODE_FIRST_UPPERCASE = 1; // only the first character should be written in uppercase
		private static final int MODE_UPPERCASE = 2;
		static final int MODE_NUMBERS = 3;
		private static final int MODE_NATIVE = 4;
		//#ifdef polish.key.ChangeInputModeKey:defined
			//#= private static final int KEY_CHANGE_MODE = ${polish.key.ChangeInputModeKey};
		//#else
			private static final int KEY_CHANGE_MODE = Canvas.KEY_POUND;
		//#endif
		private boolean nextCharUppercase; // is needed for the FIRST_UPPERCASE-mode
	
		private String[] realTextLines; // the displayed lines with spaces (which are otherwise removed)
		
		private int caretPosition; // the position of the caret in the text
		private int caretColumn; // the current column of the caret, 0 is the first column
		private int caretRow; // the current row of the caret, 0 is the first row
		private int caretX;
		private int caretY;
		private int caretWidth;
		private String originalRowText;
		
		//#ifdef polish.css.textfield-show-length
			private boolean showLength;
		//#endif

		private int lastKey; // the last key which has been pressed
		long lastInputTime; // the last time a key has been pressed
		private int characterIndex; // the index within the available characters of the current key
		// the characters for each key:
		//#ifdef polish.TextField.charactersKey1:defined
			//#= private static final String charactersKey1 = "${polish.TextField.charactersKey1}";
		//#else
			private static final String charactersKey1 = ".,!?:/@_-+1";
		//#endif
		//#ifdef polish.TextField.charactersKey2:defined
			//#= private static final String charactersKey2 = "${polish.TextField.charactersKey2}";
		//#else
			private static final String charactersKey2 = "abc2";
		//#endif
		//#ifdef polish.TextField.charactersKey3:defined
			//#= private static final String charactersKey3 = "${polish.TextField.charactersKey3}";
		//#else
			private static final String charactersKey3 = "def3";
		//#endif
		//#ifdef polish.TextField.charactersKey4:defined
			//#= private static final String charactersKey4 = "${polish.TextField.charactersKey4}";
		//#else
			private static final String charactersKey4 = "ghi4";
		//#endif
		//#ifdef polish.TextField.charactersKey5:defined
			//#= private static final String charactersKey5 = "${polish.TextField.charactersKey5}";
		//#else
			private static final String charactersKey5 = "jkl5";
		//#endif
		//#ifdef polish.TextField.charactersKey6:defined
			//#= private static final String charactersKey6 = "${polish.TextField.charactersKey6}";
		//#else
			private static final String charactersKey6 = "mno6";
		//#endif
		//#ifdef polish.TextField.charactersKey7:defined
			//#= private static final String charactersKey7 = "${polish.TextField.charactersKey7}";
		//#else
			private static final String charactersKey7 = "pqrs7";
		//#endif
		//#ifdef polish.TextField.charactersKey8:defined
			//#= private static final String charactersKey8 = "${polish.TextField.charactersKey8}";
		//#else
			private static final String charactersKey8 = "tuv8";
		//#endif
		//#ifdef polish.TextField.charactersKey9:defined
			//#= private static final String charactersKey9 = "${polish.TextField.charactersKey9}";
		//#else
			private static final String charactersKey9 = "wxyz9";
		//#endif
		//#ifdef polish.TextField.charactersKey0:defined
			//#= private static final String charactersKey0 = "${polish.TextField.charactersKey0}";
		//#else
			private static final String charactersKey0 = " 0";
		//#endif
		//#ifdef polish.TextField.charactersKeyStar:defined
			//#= private static final String charactersKeyStar = "${polish.TextField.charactersKeyStar}";
		//#else
			private static final String charactersKeyStar = ".,!?:/@_-+";
		//#endif
		//#ifdef polish.TextField.charactersKeyPound:defined
			//#= private static final String charactersKeyPound = "${polish.TextField.charactersKeyPound}";
		//#else
			private static final String charactersKeyPound = null;
		//#endif
		private static final String[] CHARACTERS = new String[]{ charactersKey0, charactersKey1, charactersKey2, charactersKey3, charactersKey4, charactersKey5, charactersKey6, charactersKey7, charactersKey8, charactersKey9 };
		private boolean caretPositionHasBeenSet;
		private boolean isNumeric;
		private boolean isDecimal;
		private boolean isEmail;

		private String caretRowFirstPart;
		private String caretRowLastPart;
		private int caretRowLastPartWidth;

		private int rowHeight;
		
		protected final Object lock;
	//#endif
	//#if polish.blackberry
		private PolishEditField editField;
		//#if polish.Bugs.ItemStateListenerCalledTooEarly
			private long lastFieldChangedEvent;
		//#endif
	//#endif
	private javax.microedition.lcdui.TextBox midpTextBox;
	protected boolean flashCaret = true;
	protected boolean isUneditable;

	private boolean doSetCaretPosition;


		


	/**
	 * Creates a new <code>TextField</code> object with the given label, initial
	 * contents, maximum size in characters, and constraints.
	 * If the text parameter is <code>null</code>, the
	 * <code>TextField</code> is created empty.
	 * The <code>maxSize</code> parameter must be greater than zero.
	 * An <code>IllegalArgumentException</code> is thrown if the
	 * length of the initial contents string exceeds <code>maxSize</code>.
	 * However,
	 * the implementation may assign a maximum size smaller than the
	 * application had requested.  If this occurs, and if the length of the
	 * contents exceeds the newly assigned maximum size, the contents are
	 * truncated from the end in order to fit, and no exception is thrown.
	 * 
	 * @param label item label
	 * @param text the initial contents, or null if the TextField is to be empty
	 * @param maxSize the maximum capacity in characters
	 * @param constraints see input constraints
	 * @throws IllegalArgumentException if maxSize is zero or less
	 * 					or if the value of the constraints parameter is invalid
	 * 					or if text is illegal for the specified constraints
	 * 					or if the length of the string exceeds the requested maximum capacity
	 */
	public TextField( String label, String text, int maxSize, int constraints)
	{
		this( label, text, maxSize, constraints, null );
	}
	
	/**
	 * Creates a new <code>TextField</code> object with the given label, initial
	 * contents, maximum size in characters, and constraints.
	 * If the text parameter is <code>null</code>, the
	 * <code>TextField</code> is created empty.
	 * The <code>maxSize</code> parameter must be greater than zero.
	 * An <code>IllegalArgumentException</code> is thrown if the
	 * length of the initial contents string exceeds <code>maxSize</code>.
	 * However,
	 * the implementation may assign a maximum size smaller than the
	 * application had requested.  If this occurs, and if the length of the
	 * contents exceeds the newly assigned maximum size, the contents are
	 * truncated from the end in order to fit, and no exception is thrown.
	 * 
	 * @param label item label
	 * @param text the initial contents, or null if the TextField is to be empty
	 * @param maxSize the maximum capacity in characters
	 * @param constraints see input constraints
	 * @param style the CSS style for this field
	 * @throws IllegalArgumentException if maxSize is zero or less
	 * 					or if the value of the constraints parameter is invalid
	 * 					or if text is illegal for the specified constraints
	 * 					or if the length of the string exceeds the requested maximum capacity
	 */
	public TextField( String label, String text, int maxSize, int constraints, Style style)
	{
		super( label, text, INTERACTIVE, style );
		//#if tmp.directInput
			this.lock = new Object();
		//#endif
		this.constraints = constraints;
		this.maxSize = maxSize;
		if (label != null) {
			this.title = label;
		} else {
			//#ifdef polish.title.input:defined
				//#= this.title = "${polish.title.input}";
			//#else
				this.title = "Input";
			//#endif
		}
		if ((constraints & PASSWORD) == PASSWORD) {
			this.isPassword = true;
			setString( text );
		}
		//#ifndef polish.hasPointerEvents
			if ((constraints & NUMERIC) == NUMERIC && (constraints & DECIMAL) != DECIMAL) {
				this.enableDirectInput = true;
			}
		//#endif
			
		setConstraints(constraints);
	}
	
	
	//#if !polish.blackberry
	/**
	 * Creates the TextBox used for the actual input mode.
	 */
	private void createTextBox() {
		String currentText = this.isPassword ? this.passwordText : this.text;
		this.midpTextBox = new javax.microedition.lcdui.TextBox( this.title, currentText, this.maxSize, this.constraints );
		//TODO add i18n support
		this.midpTextBox.addCommand(StyleSheet.OK_CMD);
		if (!this.isUneditable) {
			this.midpTextBox.addCommand(StyleSheet.CANCEL_CMD);
		}
		this.midpTextBox.setCommandListener( this );	
	}
	//#endif
	
	/**
	 * Gets the contents of the <code>TextField</code> as a string value.
	 * 
	 * @return the current contents, an empty string when the current value is null. 
	 * @see #setString(java.lang.String)
	 */
	public String getString()
	{
		//#if tmp.directInput
		if (this.caretChar != this.editingCaretChar) {
			insertCharacter();
		}
		//#endif
		//#if polish.blackberry
			if ( this.editField != null ) {
				return this.editField.getText();
			}
		//#endif
		if ( this.isPassword ) {
			return this.passwordText;
		} else {
			if (this.text == null) {
				return "";
			}
			return this.text;
		}
	}
	
	/**
	 * Retrieves the decimal value entered with a dot as the decimal mark.
	 * <ul>
	 * <li>When the value has no decimal places it will be returned as it is: 12</li>
	 * <li>When the value is null, null will be returned: null</li>
	 * <li>When the value has decimal places, a dot will be used: 12.3</li>
	 * </ul>
	 * @return either the formatted value or null, when there was no input.
	 * @throws IllegalStateException when the TextField is not DECIMAL constrained
	 */
	public String getDotSeparatedDecimalString() {
		//#if tmp.directInput
			//#if tmp.allowDirectInput
				if (this.enableDirectInput) {
			//#endif
					if (!this.isDecimal) {
						throw new IllegalStateException();
					}
					String value = getString();
					if ( Locale.DECIMAL_SEPARATOR == '.' || value == null) {
						return value;
					} else {
						return value.replace( Locale.DECIMAL_SEPARATOR, '.');
					}
			//#if tmp.allowDirectInput
				}
			//#endif
		//#endif
		//#if !tmp.forceDirectInput
			if (( getConstraints() & DECIMAL)!= DECIMAL) {
				throw new IllegalStateException();
			}
			String value = getString();
			if (value == null) {
				return null;
			}
			return value.replace(',', '.');			
		//#endif
	}

	/**
	 * Sets the contents of the <code>TextField</code> as a string
	 * value, replacing the previous contents.
	 * 
	 * @param text the new value of the TextField, or null if the TextField is to be made empty
	 * @throws IllegalArgumentException if text is illegal for the current input constraints
	 * 									or  if the text would exceed the current maximum capacity
	 * @see #getString()
	 */
	public void setString( String text)
	{
		//#debug
		System.out.println("TextField.setString( " + text + " )");
		//#if !(tmp.forceDirectInput || polish.blackberry)
			if (this.midpTextBox != null) {
				this.midpTextBox.setString( text );
			}
		//#endif
		//#if polish.blackberry