QTextCursor - setTextColor()

I've ported my Simple Telnet Client (called Dalamud) from QT3 to QT4.

Before adding new features (see my previuos post)
I want to correct one bad behaviuor.

I've a QTextEdit to display Telnet Ouput , I want it clickable for selecting text, but this way a click changes cursor position for inserting new text (insertPlainText()).
So I recoded the function for displaying output to reposition the cursor at the end of the document before inserting new Text.
It works, but I've got a very bad side-effect. Text seems to get One Color and never changes it even if another function calls setTextColor()...

Probably you need some code to help me better, I don't know how if it's better to choose some lines of code or to attach all the sources.
Now I try the first option...

The Output - QTextEdit

Code:

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OutText::OutText(QWidget * parent):  QTextEdit(parent)
{
	setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
	//Settaggio Font
	QFont Font=currentFont();
	Font.setFamily("Courier New");
	setCurrentFont(Font);
	//Settaggio dei Colori
	QPalette Pal;
	Pal=palette();
	Pal.setColor(QPalette::Base,Qt::black);
	setPalette(Pal);
//	setPaper(QBrush("black"));
	setTextColor(Qt::green);
	insertPlainText("STIKAZZI");
	setTextColor(Qt::white);
	insertPlainText("!");
	setReadOnly(TRUE);
}
 
void OutText::writeIn(QString str)
{
	QTextCursor Cursor=textCursor();
	Cursor.setPosition(document()->toPlainText().length());
	setTextCursor(Cursor);
 
    insertPlainText(str);
	QScrollBar* Vbar;
	Vbar=verticalScrollBar();
	Vbar->setValue(Vbar->maximum());
}

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The slot that would change Text Color (it's on the parent class of OutText, the instance of OutText it's called OutT)

Code:

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void MainDialog::changeColor()
{
	QColor NewColor;
	if (Telnet.Color.high)
	{
		switch(Telnet.Color.foreground)
		{
			case Foreground::BLACK:
				NewColor=Qt::gray;
				break;
			case Foreground::RED:
				NewColor=Qt::red;
				break;
			case Foreground::GREEN:
				NewColor=Qt::green;
				break;
			case Foreground::YELLOW:
				NewColor=Qt::yellow;
				break;
			case Foreground::BLUE:
				NewColor=Qt::blue;
				break;
			case Foreground::MAGENTA:
				NewColor=Qt::magenta;
				break;
			case Foreground::CYAN:
				NewColor=Qt::cyan;
				break;
			case Foreground::WHITE:
				NewColor=Qt::white;
				break;
		}
	}
	else
	{
		switch(Telnet.Color.foreground)
		{
			case Foreground::BLACK:
				NewColor=Qt::black;
				break;
			case Foreground::RED:
				NewColor=Qt::darkRed;
				break;
			case Foreground::GREEN:
				NewColor=Qt::darkGreen;
				break;
			case Foreground::YELLOW:
				NewColor=Qt::darkYellow;
				break;
			case Foreground::BLUE:
				NewColor=Qt::darkBlue;
				break;
			case Foreground::MAGENTA:
				NewColor=Qt::darkMagenta;
				break;
			case Foreground::CYAN:
				NewColor=Qt::darkCyan;
				break;
			case Foreground::WHITE:
				NewColor=Qt::lightGray;
				break;
		}
	}
	OutT.setTextColor(NewColor);
}

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Screenshots