How to set TextFormat of a TextBlock directly

[wang9658]

textDoc = QTextEdit->document;
...

I want to set one line's color, but no effect. I think for the TextBlock of plaintext, block and line are same things.

QTextBlock blk = textDoc->begin(); 
int index = 0; 
while(blk.isValid()){ 
qDebug() << "BLOCK:" << blk.text(); 
index++; 
if(1){//index == 10){ 
QTextCursor cursor(blk); 
QTextCharFormat format; 
format.setForeground(Qt::darkYellow); 
format.setBackground(Qt::gray); 
cursor.setBlockCharFormat(format); 
} 
blk = blk.next(); 
}

QTextBlock blk = textDoc->begin(); 
int index = 0; 
while(blk.isValid()){ 
qDebug() << "BLOCK:" << blk.text(); 
index++; 
if(1){//index == 10){ 
QTextCursor cursor(blk); 
QTextCharFormat format; 
format.setForeground(Qt::darkYellow); 
format.setBackground(Qt::gray); 
cursor.setBlockCharFormat(format); 
} 
blk = blk.next(); 
}

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