CODEWITHSUNDEEP
windows-runtimewin-universal-appscrollviewerricheditbox
William Jones
William Jones

Reputation: 18279

UWP/WinRT: How to scroll a RichEditBox to the cursor position?

I've implemented a find function on a RichEditBox that when executed will search for query and select the found text inside the RichEditBox:

String^ docText;
currentRichEditBox->Document->GetText(Text::TextGetOptions::None, &docText);
start = currentRichEditBox->Document->Selection->EndPosition;
end = docText->Length();
int result = newRange->FindText(query, end-start, Text::FindOptions::None);
if (result != 0)
{
    currentRichEditBox->Document->Selection->SetRange(newRange->StartPosition, newRange->EndPosition);
}

This works, in that the text that is found is properly selected. However, for a RichEditBox whose contents are so long as to scroll, this will be off-screen and the RichEditBox won't scroll to bring it into view. Oddly enough, however, if this code is re-run then it'll scroll into view the previous result. For example, take the following text:

This is a test

[Screen end]

1 hat

2 hat

When my code searches for hat, it will successfully highlight the first instance of the word hat. However, the RichEditBox won't scroll down to it, even though it's off-screen. The second time the code is run, it will both highlight the second instance and scroll the screen down to the first instance of the word hat.

I am assuming there is a bug in the code for RichEditBox that is causing this. Is there any programmatic way I can manually scroll the RichEditBox or its implicit ScrollViewer to bring the caret into view?

Upvotes: 0

Views: 726

Answers (1)

WiredPrairie
WiredPrairie

Reputation: 59793

To scroll the highlighted text into position, you'll need to use the ScrollIntoView method available on the ITextRange interface.

Upvotes: 1

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