CodeEditor = problem

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CodeEditor = problem

 
0
  #1
Oct 31st, 2009
Hello,

I have a problem which is this:

Java Syntax (Toggle Plain Text) 
  1. private void setupEditor() 
  2.     {
  3.         QFont font = new QFont();
  4.         font.setFamily("Lucida Console");
  5.         font.setFixedPitch(true);
  6.         font.setPointSize(10);
  7.  
  8.         textEdit = new QTextEdit();
  9.         textEdit.setLineWrapMode(QTextEdit.LineWrapMode.NoWrap);
  10.         textEdit.setFont(font);
  11.  
  12.         new Highlighter(textEdit.document());
  13.         new CodeEditor(textEdit.document()); 
  14.  
  15.     }
  16.     public class CodeEditor extends QPlainTextEdit
  17.     {
  18.     	public CodeEditor(QTextDocument textDocument)
  19.     //	public CodeEditor()
  20.         {
  21.             lineNumberArea = new LineNumberArea(this);
  22.  
  23.             blockCountChanged.connect(this, "updateLineNumberAreaWidth(Integer)");
  24.             updateRequest.connect(this, "updateLineNumberArea(QRect,Integer)");
  25.             cursorPositionChanged.connect(this, "highlightCurrentLine()");
  26.  
  27.             updateLineNumberAreaWidth(0);
  28.             highlightCurrentLine();
  29.  
  30.         }
  31.     	 public int lineNumberAreaWidth()
  32.     	    {
  33.     	        int digits = 1;
  34.     	        int max = Math.max(1, blockCount());
  35.     	        while (max >= 10) {
  36.     	            max /= 10;
  37.     	            ++digits;
  38.     	        }
  39.  
  40.     	        int space = 3 + fontMetrics().width('9') * digits;
  41.  
  42.     	        return space;
  43.     	    }
  44.     	    public void updateLineNumberAreaWidth(Integer newBlockCount)
  45.     	    {
  46.     	        setViewportMargins(lineNumberAreaWidth(), 0, 0, 0);
  47.     	    }
  48.     	    public void updateLineNumberArea(QRect rect, Integer dy)
  49.     	    {
  50.     	        if (dy > 0)
  51.     	            lineNumberArea.scroll(0, dy);
  52.     	        else
  53.     	            lineNumberArea.update(0, rect.y(), lineNumberArea.width(),
  54.     	                                  rect.height());
  55.  
  56.     	        if (rect.contains(viewport().rect()))
  57.     	            updateLineNumberAreaWidth(0);
  58.     	    }
  59.     	    protected void resizeEvent(QResizeEvent e)
  60.     	    {
  61.     	        super.resizeEvent(e);
  62.  
  63.     	        QRect cr = contentsRect();
  64.     	        lineNumberArea.setGeometry(new QRect(cr.left(), cr.top(),
  65.     	                                   lineNumberAreaWidth(), cr.height()));
  66.     	    }
  67.     	    private void highlightCurrentLine()
  68.     	    {
  69.     	        List<QTextEdit_ExtraSelection> extraSelections =
  70.     	            new Vector<QTextEdit_ExtraSelection>();
  71.  
  72.     	        if (!isReadOnly()) {
  73.     	            QTextEdit_ExtraSelection selection =
  74.     	                new QTextEdit_ExtraSelection();
  75.  
  76.     	            QColor lineColor = QColor.yellow.lighter(160);
  77.  
  78.     	            QTextCharFormat format = selection.format();
  79.     	            format.setBackground(new QBrush(lineColor));
  80.     	            format.setProperty(QTextFormat.Property.FullWidthSelection.value(), new Boolean(true));
  81.     	            selection.setFormat(format);
  82.     	            QTextCursor cursor = textCursor();
  83.     	            cursor.clearSelection();
  84.     	            selection.setCursor(cursor);
  85.     	            extraSelections.add(selection);
  86.     	        }
  87.  
  88.     	        setExtraSelections(extraSelections);
  89.     	    }
  90.     	    public void lineNumberAreaPaintEvent(QPaintEvent event)
  91.     	    {
  92.     	        QPainter painter = new QPainter(lineNumberArea);
  93.     	        painter.setPen(new QPen(QColor.black));
  94.     	        painter.fillRect(event.rect(), new QBrush(QColor.lightGray));
  95.  
  96.     	        QTextBlock block = firstVisibleBlock();
  97.     	        int blockNumber = block.blockNumber();
  98.     	        int top = (int) blockBoundingGeometry(block).translated(contentOffset()).top();
  99.     	        int bottom = top + (int) blockBoundingRect(block).height();
  100.  
  101.     	        while (block.isValid() && top <= event.rect().bottom()) {
  102.     	            if (block.isVisible() && bottom >= event.rect().top()) {
  103.     	                String number = String.valueOf(blockNumber + 1);
  104.     	                painter.drawText(0, top, lineNumberArea.width(), fontMetrics().height(),
  105.     	                                Qt.AlignmentFlag.AlignRight.value(), number);
  106.     	            }
  107.  
  108.     	            block = block.next();
  109.     	            top = bottom;
  110.     	            bottom = top + (int) blockBoundingRect(block).height();
  111.     	            ++blockNumber;
  112.     	        }
  113.     	    } 
  114.  
  115.     	    private class LineNumberArea extends QWidget
  116.     	    {
  117.     	        public LineNumberArea(CodeEditor editor)
  118.     	        {
  119.     	            codeEditor = editor;
  120.     	            setParent(codeEditor);
  121.     	        }
  122.     	        public QSize sizeHint()
  123.     	        {
  124.     	            return new QSize(codeEditor.lineNumberAreaWidth(), 0);
  125.     	        }
  126.     	        protected void paintEvent(QPaintEvent event)
  127.     	        {
  128.     	            codeEditor.lineNumberAreaPaintEvent(event);
  129.     	        }
  130.     	        private CodeEditor codeEditor;
  131.     	    }
  132.  
  133.     	    private LineNumberArea lineNumberArea;
  134.     }

and the problem is there:

new CodeEditor(textEdit.document());

it does't appear at TextEdit

Kjiu
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0
  #2
Oct 31st, 2009
You are working with package qtjambi. You should know it better.

first read
http://doc.trolltech.com/qtjambi-4.5.2_01/index.html
http://doc.trolltech.com/qtjambi-4.5...nTextEdit.html

select proper method from QPlainTextEdit to apply textEdit.document() in CodeEditor constructor
Last edited by quuba; Oct 31st, 2009 at 12:16 pm.
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-1
  #3
Oct 31st, 2009
thank's but I don't know how to write this code.. can you write my code

please!!
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  #4
Oct 31st, 2009
use method (from documentation of package mentioned above)
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void setDocument(QTextDocument document)
Makes document the new document of the text editor.
Last edited by quuba; Oct 31st, 2009 at 3:51 pm.
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  #5
Oct 31st, 2009
sorry for that, I am beginner of learning Java

where I must put :

Java Syntax (Toggle Plain Text) 
  1. void	setDocument(QTextDocument document)

Java Syntax (Toggle Plain Text) 
  1. new Highlighter(textEdit.document());
  2.         new CodeEditor(textEdit.document());
  3.     }
  4.     public class CodeEditor extends QPlainTextEdit
  5.  
  6.     {
  7.     	public CodeEditor(QTextDocument parent)
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  #6
Oct 31st, 2009
Java Syntax (Toggle Plain Text) 
  1.   public class CodeEditor extends QPlainTextEdit
  2.     {
  3.     	public CodeEditor(QTextDocument textDocument) //textDocument as parameter in constructor
  4.     //	public CodeEditor()
  5.         {
  6. // here
  7.             setDocument(textDocument); //  the same textDocument as argument in method setDocument(
  8.  
  9.             lineNumberArea = new LineNumberArea(this);
  10.             // .......
Learn Passing Information to a Method or a Constructor
http://java.sun.com/docs/books/tutor...arguments.html
Last edited by quuba; Oct 31st, 2009 at 4:55 pm.
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0
  #7
Oct 31st, 2009
hmmm the error is:

QPlainTextEdit::setDocument: Document set does not support QPlainTextDocumentLayout

Java Syntax (Toggle Plain Text) 
  1. private void setupEditor() 
  2.     {
  3.         QFont font = new QFont();
  4.         font.setFamily("Arial");
  5.         font.setFixedPitch(true);
  6.         font.setPointSize(10);
  7.  
  8.         textEdit = new QTextEdit();
  9.         textEdit.setLineWrapMode(QTextEdit.LineWrapMode.NoWrap);
  10.         textEdit.setFont(font);
  11.  
  12.         new Highlighter(textEdit.document());
  13.         new CodeEditor(textEdit.document());
  14.     }
  15.     public class CodeEditor extends QPlainTextEdit
  16.  
  17.     {
  18.     	public CodeEditor(QTextDocument textDocument)
  19.     //	public CodeEditor()
  20.         {
  21.     	    setDocument(textDocument);
  22.             lineNumberArea = new LineNumberArea(this);
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  #8
Oct 31st, 2009
Summary of conversation.
I know, You want to use the package trolltech to create applications.
As a beginner java programmer you cetainly think "this is the shortest way to achieve rapid results".
As you can see, the use of the package trolltech requires knowledge of two things: first - knowledge of java, a second -knowledge of the specific package trolltech. I think that I have some basic knowledge on java, but I do not know trolltech package.
I can help with the java language problems, but not with a specific package.
For this, I recommend systematic learning the Java language and the Java API, that allows you to create programs with a greater perspective. You can do this, as I did and still do, being self-taught.
See you later on Dani Web pages.

quuba
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  #9
Oct 31st, 2009
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run:
QPlainTextEdit::setDocument: Document set does not support QPlainTextDocumentLayout
BUILD SUCCESSFUL (total time: 8 seconds)
Java Syntax (Toggle Plain Text) 
  1.     public static void main(String args[]) {
  2.         QApplication.initialize(args);
  3.         //
  4.         QFont font = new QFont();
  5.         font.setFamily("Lucida Console");
  6.         font.setFixedPitch(true);
  7.         font.setPointSize(30);
  8.         QTextEdit textEdit = new QTextEdit();
  9.         // textEdit.setLineWrapMode(QTextEdit.LineWrapMode.NoWrap);
  10.         textEdit.setFont(font);
  11.         textEdit.insertHtml("<H1><HR WIDTH=\"100%\">Applet HTML Page<HR WIDTH=\"100%\"></H1><P>aaaaaaaaaaaa</P>");
  12.  
  13.         new CodeEditor(textEdit).show();
  14.         QApplication.exec();
  15.     }
Java Syntax (Toggle Plain Text) 
  1. public class CodeEditor extends QTextEdit {
  2.  
  3. //![constructor]
  4.     public CodeEditor(QTextEdit textEdit) {
  5.         super.setDocument(textEdit.document());
  6.  
  7.         //lineNumberArea = new LineNumberArea(this);
  8.  
  9.         //blockCountChanged.connect(this, "updateLineNumberAreaWidth(Integer)");
  10.         //updateRequest.connect(this, "updateLineNumberArea(QRect,Integer)");
  11.         cursorPositionChanged.connect(this, "highlightCurrentLine()");
  12.  
  13.         //updateLineNumberAreaWidth(0);
  14.         highlightCurrentLine();
  15.  
  16.         setWindowTitle("Code Editor Example");
  17.         setWindowIcon(new QIcon("classpath:com/trolltech/images/qt-logo.png"));
  18.     }
textEdit is type of QTextEdit then
CodeEditor must extend QTextEdit
commented lines does not work in case QTextEdit.
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  #10
Nov 1st, 2009
thanks, but I wanted to have Highlighter and CodeEditor.

I want to be like this :

http://i37.tinypic.com/esixyh.png
Last edited by kjiu; Nov 1st, 2009 at 3:32 am.
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