Como criar uma entrada de texto personalizada, em Java ME - Revision history

Hamishwillee: Hamishwillee - delete duplicate translation link

2011-12-18T23:56:14Z

Hamishwillee - delete duplicate translation link

Hamishwillee: Hamishwillee - Adding missing translation link

2011-12-16T04:42:00Z

Hamishwillee - Adding missing translation link

Hamishwillee: Hamishwillee - Bot update of Template:ArticleMetaData - Deleting duplicate original translation link

2011-12-08T05:53:16Z

Hamishwillee - Bot update of Template:ArticleMetaData - Deleting duplicate original translation link

Hamishwillee: Hamishwillee - Bot update of Template:ArticleMetaData

2011-12-07T06:52:20Z

Hamishwillee - Bot update of Template:ArticleMetaData

Hamishwillee: Hamishwillee - Bot addition of Template:ArticleMetaData

2011-11-10T04:19:48Z

Hamishwillee - Bot addition of Template:ArticleMetaData

Hamishwillee: Hamishwillee - Automated change of category from Lang-PT to Unlikely Category. (Moving)

2011-07-14T05:17:54Z

Hamishwillee - Automated change of category from Lang-PT to Unlikely Category. (Moving)

Mavi85bmn at 00:50, 20 April 2010

2010-04-20T00:50:36Z

Valderind4: moved J2ME Custom Text Input. to Como criar uma entrada de texto personalizada, em Java ME

2009-09-07T01:53:27Z

moved J2ME Custom Text Input. to Como criar uma entrada de texto personalizada, em Java ME

Valderind4 at 01:51, 7 September 2009

2009-09-07T01:51:50Z

Valderind4: Created page with 'Category:Java ME (Português) Category:Lang-PT Category:Exemplos de código Java ME Category:UI Original em: J2ME Custom Text Input Aqui está um Midlet sim…'

2009-09-05T06:00:50Z

Created page with 'Category:Java ME (Português) Category:Lang-PT Category:Exemplos de código Java ME Category:UI Original em: J2ME Custom Text Input Aqui está um Midlet sim…'

New page

[[Category:Java ME (Português)]]
[[Category:Lang-PT]]
[[Category:Exemplos de código Java ME]]
[[Category:UI]]
Original em: [[J2ME Custom Text Input]]

Aqui está um Midlet simples: [[Media:CustomInputMidlet.zip]]

Aqui está um básico exemplo mostrando como criar uma entrada de texto customizada usando J2me e Canvas, coisas que muitas das vezes é necessario quando se está trabalhando com gráficos de baixo nível( por exemplo jogos).

Neste código você pode:
* definir qual mapa de caracteres para cada tecla
* definir o itervalo de piscagem
* definir o intevalo máximo entre subsequentes teclas pessionadas
* mover esquerda/direita, dentro dos limites o texto
* apagar o texto

Muitas das características não estão presentes, logo se você quiser implementá-las agradeço :)

<code java>
package com.jappit.custominput.screen;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;

public class CustomInputCanvas extends Canvas implements Runnable
{
static final char[] KEY_NUM1_CHARS = new char[]{'.', '?', '!'};
static final char[] KEY_NUM2_CHARS = new char[]{'a', 'b', 'c'};
static final char[] KEY_NUM3_CHARS = new char[]{'d', 'e', 'f'};
static final char[] KEY_NUM4_CHARS = new char[]{'g', 'h', 'i'};
static final char[] KEY_NUM5_CHARS = new char[]{'j', 'k', 'l'};
static final char[] KEY_NUM6_CHARS = new char[]{'m', 'n', 'o'};
static final char[] KEY_NUM7_CHARS = new char[]{'p', 'q', 'r', 's'};
static final char[] KEY_NUM8_CHARS = new char[]{'t', 'u', 'v'};
static final char[] KEY_NUM9_CHARS = new char[]{'w', 'x', 'y', 'z'};
static final char[] KEY_NUM0_CHARS = new char[]{' '};

int clearKeyCode = Integer.MIN_VALUE;

StringBuffer currentText = new StringBuffer();
String currentString = new String();

int lastPressedKey = Integer.MIN_VALUE;
int currentKeyStep = 0;

Font inputFont = null;
int inputWidth = 0;
int inputHeight = 0;
int inputTranslationX = 0;

long lastKeyTimestamp = 0;
long maxKeyDelay = 500L;

int caretIndex = 0;
int caretLeft = 0;
boolean caretBlinkOn = true;
long caretBlinkDelay = 500L;
long lastCaretBlink = 0;

boolean goToNextChar = true;

public CustomInputCanvas()
{
new Thread(this).start();

inputFont = Font.getDefaultFont();

inputWidth = getWidth();

inputHeight = inputFont.getHeight();
}

public char[] getChars(int key)
{
switch(key)
{
case Canvas.KEY_NUM1: return KEY_NUM1_CHARS;
case Canvas.KEY_NUM2: return KEY_NUM2_CHARS;
case Canvas.KEY_NUM3: return KEY_NUM3_CHARS;
case Canvas.KEY_NUM4: return KEY_NUM4_CHARS;
case Canvas.KEY_NUM5: return KEY_NUM5_CHARS;
case Canvas.KEY_NUM6: return KEY_NUM6_CHARS;
case Canvas.KEY_NUM7: return KEY_NUM7_CHARS;
case Canvas.KEY_NUM8: return KEY_NUM8_CHARS;
case Canvas.KEY_NUM9: return KEY_NUM9_CHARS;
case Canvas.KEY_NUM0: return KEY_NUM0_CHARS;
}
return null;
}
boolean isClearKey(int key)
{
return key == -8;
}

void clearChar()
{
if(currentText.length() > 0 && caretIndex > 0)
{
caretIndex--;

currentText.deleteCharAt(caretIndex);

currentString = currentText.toString();
}
}
void updateCaretPosition()
{
caretLeft = inputFont.substringWidth(currentString, 0, caretIndex);

if(caretLeft + inputTranslationX < 0)
{
inputTranslationX = - caretLeft;
}
else if(caretLeft + inputTranslationX > inputWidth)
{
inputTranslationX = inputWidth - caretLeft;
}
}
public void keyPressed(int key)
{
int gameAction = getGameAction(key);

System.out.println("KEY: " + key + ", " + gameAction);

if(isClearKey(key))
{
clearChar();

updateCaretPosition();

goToNextChar = true;
}
else if(key >= KEY_NUM0 && key <= KEY_NUM9)
{
writeKeyPressed(key);
}
else if(gameAction == Canvas.LEFT)
{
if(caretIndex > 0)
{
caretIndex--;

updateCaretPosition();

goToNextChar = true;
}
}
else if(gameAction == Canvas.RIGHT)
{
if(caretIndex < currentText.length())
{
if(goToNextChar)
caretIndex++;

updateCaretPosition();

goToNextChar = true;
}
}
}
public void writeKeyPressed(int key)
{
if(goToNextChar || key != lastPressedKey)
{
goToNextChar = true;

lastPressedKey = key;

currentKeyStep = 0;
}
else
{
currentKeyStep++;
}

char[] chars = getChars(key);

if(chars != null)
{
if(currentKeyStep >= chars.length)
{
currentKeyStep -= chars.length;
}
if(goToNextChar)
{
currentText.insert(caretIndex, chars[currentKeyStep]);

caretIndex++;
}
else
{
currentText.setCharAt(caretIndex - 1, chars[currentKeyStep]);
}
currentString = currentText.toString();

updateCaretPosition();

lastKeyTimestamp = System.currentTimeMillis();

goToNextChar = false;
}
}

public void checkTimestamps()
{
long currentTime = System.currentTimeMillis();

if(lastCaretBlink + caretBlinkDelay < currentTime)
{
caretBlinkOn = !caretBlinkOn;

lastCaretBlink = currentTime;
}

if(!goToNextChar && lastKeyTimestamp + maxKeyDelay < currentTime)
{
goToNextChar = true;
}
}

public void run()
{
while(true)
{
checkTimestamps();

repaint();

try
{
synchronized(this)
{
wait(50L);
}
}
catch(Exception e)
{
e.printStackTrace();
}
}
}

public void paint(Graphics g)
{
g.setFont(inputFont);

g.setColor(0xffffff);

g.fillRect(0, 0, getWidth(), getHeight());

g.setColor(0x000000);

g.translate(inputTranslationX, 0);

g.drawString(currentString, 0, 0, Graphics.LEFT | Graphics.TOP);

if(caretBlinkOn && goToNextChar)
{
g.drawLine(caretLeft, 0, caretLeft, inputHeight);
}
g.translate(- inputTranslationX, 0);
}
}

</code>

@@ Line 1: / Line 1: @@
 {{ArticleMetaData
 |sourcecode=[[Media:CustomInputMidlet.zip]]
@@ Line 21: / Line 22: @@
 |creationdate=20090905
 |author=[[User:Jappit]]
-}}[[Category:Java ME]]
+}}
-[[Category:Lang-Portuguese]]
-[[Category:Code Examples]]
-[[Category:UI]]
@@ Line 289: / Line 290: @@
 </code>
 <!-- Translation --> [[en:Custom Text Input in Java ME]]

← Older revision		Revision as of 04:42, 16 December 2011
Line 289:		Line 289:
	</code>		</code>
	<!-- Translation --> [[en:Custom Text Input in Java ME]]		<!-- Translation --> [[en:Custom Text Input in Java ME]]
		+	<!-- Translation --> [[pt:Capturar Texto Digitado Utilizando Canvas]]

@@ Line 13: / Line 13: @@
 |language=Lang-Portuguese
 |translated-by=[[User:Valderind4]]
-|translated-from-title=J2ME Custom Text Input
+|translated-from-title=Custom Text Input in Java ME
 |translated-from-id= <!-- Id of translated revision -->
 |review-by=<!-- After re-review: [[User:username]] -->
@@ Line 20: / Line 20: @@
 |update-timestamp=<!-- After significant update: YYYYMMDD -->
 |creationdate=20090905
-|author=[[User:Valderind4]]
+|author=[[User:Jappit]]
 }}[[Category:Java ME]]
 [[Category:Lang-Portuguese]]
 [[Category:Code Examples]]
 [[Category:UI]]
@@ Line 289: / Line 288: @@
 </code>
-<!-- Translation --> [[en:J2ME Custom Text Input]]
+<!-- Translation --> [[en:Custom Text Input in Java ME]]

@@ Line 12: / Line 12: @@
 |id= <!-- Article Id (Knowledge base articles only) -->
 |language=Lang-Portuguese
-|translated-by= <!-- [[User: XXXXX]] -->
+|translated-by=[[User:Valderind4]]
-|translated-from-title=<!-- Title only -->
+|translated-from-title=J2ME Custom Text Input
 |translated-from-id= <!-- Id of translated revision -->
 |review-by=<!-- After re-review: [[User:username]] -->
@@ Line 289: / Line 289: @@
 </code>

@@ Line 1: / Line 1: @@
-[[Category:Java ME]]
+{{ArticleMetaData
 [[Category:Lang-Portuguese]]
 [[Category:Code Examples]]

@@ Line 28: / Line 28: @@
 public class CustomInputCanvas extends Canvas implements Runnable
+{
-	static final char[] KEY_NUM1_CHARS = new char[]{'.', '?', '!'};
+	static final char[] KEY_NUM1_CHARS = {'.', '?', '!'};
-	static final char[] KEY_NUM2_CHARS = new char[]{'a', 'b', 'c'};
+	static final char[] KEY_NUM2_CHARS = {'a', 'b', 'c'};
-	static final char[] KEY_NUM3_CHARS = new char[]{'d', 'e', 'f'};
+	static final char[] KEY_NUM3_CHARS = {'d', 'e', 'f'};
-	static final char[] KEY_NUM4_CHARS = new char[]{'g', 'h', 'i'};
+	static final char[] KEY_NUM4_CHARS = {'g', 'h', 'i'};
-	static final char[] KEY_NUM5_CHARS = new char[]{'j', 'k', 'l'};
+	static final char[] KEY_NUM5_CHARS = {'j', 'k', 'l'};
-	static final char[] KEY_NUM6_CHARS = new char[]{'m', 'n', 'o'};
+	static final char[] KEY_NUM6_CHARS = {'m', 'n', 'o'};
-	static final char[] KEY_NUM7_CHARS = new char[]{'p', 'q', 'r', 's'};
+	static final char[] KEY_NUM7_CHARS = {'p', 'q', 'r', 's'};
-	static final char[] KEY_NUM8_CHARS = new char[]{'t', 'u', 'v'};
+	static final char[] KEY_NUM8_CHARS = {'t', 'u', 'v'};
-	static final char[] KEY_NUM9_CHARS = new char[]{'w', 'x', 'y', 'z'};
+	static final char[] KEY_NUM9_CHARS = {'w', 'x', 'y', 'z'};
-	static final char[] KEY_NUM0_CHARS = new char[]{' '};
+	static final char[] KEY_NUM0_CHARS = {' '};
 	int clearKeyCode = Integer.MIN_VALUE;

@@ Line 6: / Line 6: @@
-Aqui está um Midlet simples: [[Media:CustomInputMidlet.zip]]
+Aqui está um simples MIDlet: [[Media:CustomInputMidlet.zip]]
-Aqui está um básico exemplo mostrando como criar uma entrada de texto customizada usando J2me e Canvas, coisas que muitas das vezes é necessario quando se está trabalhando com gráficos de baixo nível( por exemplo jogos).
+Aqui está um básico exemplo mostrando como criar uma entrada de texto personalizada, usando Canvas, em Java ME, coisas que muitas das vezes é necessario quando se está trabalhando com gráficos de baixo nível( por exemplo jogos).
 Neste código você pode: