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TextEditor: fix animate navigation within file

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The calculation based on visible lines is not working as
expected when we have collapsed blocks. Using QPlainTextEdit
functions to get the correct target scroll bar value.

Task-number: QTCREATORBUG-19327
Change-Id: I0393fc94ba2a11caeaa77d6d87bc69c6c7de1bb7
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
This commit is contained in:
David Schulz
2017-11-29 12:45:16 +01:00
parent 09f0d1a2ca
commit d0bf2a4528
1 changed files with 9 additions and 14 deletions
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23
src/plugins/texteditor/texteditor.cpp
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@@ -2713,24 +2713,19 @@ void TextEditorWidget::gotoLine(int line, int column, bool centerLine, bool anim
const DisplaySettings &ds = d->m_displaySettings;
if (animate && ds.m_animateNavigationWithinFile) {
const QScrollBar *scrollBar = verticalScrollBar();
QScrollBar *scrollBar = verticalScrollBar();
const int start = scrollBar->value();
setTextCursor(cursor);
ensureBlockIsUnfolded(block);
const int visibleLines = lastVisibleLine() - firstVisibleLine();
int end = 0;
auto it = document()->firstBlock();
while (it.isValid() && it != block) {
if (it.isVisible())
++end;
it = it.next();
}
setUpdatesEnabled(false);
setTextCursor(cursor);
if (centerLine)
end = qMin(scrollBar->maximum(), qMax(scrollBar->minimum(), end - visibleLines / 2));
centerCursor();
else
ensureCursorVisible();
const int end = scrollBar->value();
scrollBar->setValue(start);
setUpdatesEnabled(true);
const int delta = end - start;
// limit the number of steps for the animation otherwise you wont be able to tell