plaintextEdit draw text with clipRect should consider cusorWidth

If the width of the text to be drawn is equal to the width of
clipRect, the cursor will not be displayed.
So we need add cursorWidth to the clipRect when draw text.

Fixes: QTBUG-94028
Change-Id: I8686953f13c04d224327cf0f865ded7241d80ccd
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
(cherry picked from commit 7451fb36fd1de38868c6c9a48da0b1b66a771672)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/widgets/widgets/qplaintextedit.cpp b/src/widgets/widgets/qplaintextedit.cpp
index 97e6ccef36..3d5f155286 100644
--- a/src/widgets/widgets/qplaintextedit.cpp
+++ b/src/widgets/widgets/qplaintextedit.cpp
@@ -1942,7 +1942,7 @@ void QPlainTextEdit::paintEvent(QPaintEvent *e)
 
     // keep right margin clean from full-width selection
     int maxX = offset.x() + qMax((qreal)viewportRect.width(), maximumWidth)
-               - document()->documentMargin();
+               - document()->documentMargin() + cursorWidth();
     er.setRight(qMin(er.right(), maxX));
     painter.setClipRect(er);