animatedheightwidget: ignore PageUp/PageDown to avoid invisible scroll

When typing in the search bar (or other widgets using AnimatedHeightWidget), pressing PageUp or PageDown would cause the internal QScrollArea (with hidden scrollbars) to react and scroll. This made the entered text appear to disappear even though focus stayed in the input field. PageUp and PageDown are now intercepted in AnimatedHeightWidget to prevent the underlying QScrollArea from handling them, ensuring input remains visible across all users of AnimatedHeightWidget.

BUG: 508835

1 files changed, 16 insertions, 0 deletions

diff --git a/src/animatedheightwidget.cpp b/src/animatedheightwidget.cpp
index cd62f3971..c89863b25 100644
--- a/src/animatedheightwidget.cpp
+++ b/src/animatedheightwidget.cpp
@@ -7,7 +7,9 @@
 
 #include "animatedheightwidget.h"
 
+#include <QEvent>
 #include <QGridLayout>
+#include <QKeyEvent>
 #include <QPropertyAnimation>
 #include <QScrollArea>
 #include <QScrollBar>
@@ -86,6 +88,7 @@ QWidget *AnimatedHeightWidget::prepareContentsContainer(QWidget *contentsContain
     contentsContainer->setParent(m_contentsContainerParent);
     m_contentsContainerParent->setWidget(contentsContainer);
     m_contentsContainerParent->setFocusProxy(contentsContainer);
+    contentsContainer->installEventFilter(this);
     return contentsContainer;
 }
 
@@ -93,3 +96,16 @@ bool AnimatedHeightWidget::isAnimationRunning() const
 {
     return m_heightAnimation && m_heightAnimation->state() == QAbstractAnimation::Running;
 }
+
+bool AnimatedHeightWidget::eventFilter(QObject *obj, QEvent *event)
+{
+    if (event->type() == QEvent::KeyPress) {
+        auto *keyEvent = static_cast<QKeyEvent *>(event);
+        // Ignore PageUp/PageDown to prevent QScrollArea (invisible scrollbar) from scrolling
+        if (keyEvent->key() == Qt::Key_PageUp || keyEvent->key() == Qt::Key_PageDown) {
+            keyEvent->accept();
+            return true;
+        }
+    }
+    return QWidget::eventFilter(obj, event);
+}
\ No newline at end of file