[SOLVED] Access to QTextEdit lines
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Good day all!
I have QTextEdit widget. And I need random access to specified line for this widget.
I found two ways to resolve this task:@
//1
QTextEdit * textEdit;
QTextDocument * doc = textEdit->document();
QString line = doc->findBlockByLineNumber( 0 ).text();//2
QTextEdit * textEdit;
QString allText = textEdit->toPlainText();
int fromIndex = 0;
int toIndex = 0;
while ( ( toIndex = allText.indexOf("n", fromIndex) ) != -1 )
{
// Load next line from all text
QString line = QString( allText.begin() + fromIndex, toIndex - fromIndex );
}
@Who know other different or more correct ways to resolve this task?
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What's wrong with method 1?
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Here all right.
But I do not know what could be inside QTextBlock - one line or multiple lines? -
Conceptually, there could be more than one line in a block. However, the documentation for QTextBlock::firstLineNumber states:
[quote]Unless the layout supports it, the line number is identical to the block number.[/quote]
So, I guess that in normal circumstances, every line is represented by one block.I agree that it is a bit unclear...
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A QTextBlock basically represents a paragraph (eg. <p> in HTML). That is "one line" in the sense of missing line breaks (<br> in HTML, but you can add them!). It is not one line in the sense of visible lines in QTextEdit, as a paragraph consisting of - say - 1000 chars is wrapped and displayed in multiple lines on the screen.