cabana: fix two ui bugs (#30327)

fix ui bugs

tools/cabana/signalview.cc

@@ -504,7 +504,7 @@ SignalView::SignalView(ChartsWidget *charts, QWidget *parent) : charts(charts),
   QObject::connect(can, &AbstractStream::msgsReceived, this, &SignalView::updateState);
   QObject::connect(tree->header(), &QHeaderView::sectionResized, [this](int logicalIndex, int oldSize, int newSize) {
     if (logicalIndex == 1) {
-      value_column_width = newSize - delegate->button_size.width();
+      value_column_width = newSize;
       updateState();
     }
   });
@@ -645,8 +645,9 @@ void SignalView::updateState(const QHash<MessageId, CanData> *msgs) {
     }
 
     const static int min_max_width = QFontMetrics(delegate->minmax_font).width("-000.00") + 5;
-    int value_width = std::min<int>(max_value_width + min_max_width, value_column_width / 2);
-    QSize size(value_column_width - value_width,
+    int available_width = value_column_width - delegate->button_size.width();
+    int value_width = std::min<int>(max_value_width + min_max_width, available_width / 2);
+    QSize size(available_width - value_width,
                delegate->button_size.height() - style()->pixelMetric(QStyle::PM_FocusFrameVMargin) * 2);
     QFutureSynchronizer<void> synchronizer;
     for (int i = first_visible_row; i <= last_visible_row; ++i) {

tools/cabana/videowidget.cc

@@ -140,7 +140,7 @@ QWidget *VideoWidget::createCameraWidget() {
   stacked->addWidget(alert_label = new InfoLabel(this));
   l->addLayout(stacked);
 
-  l->addWidget(slider = new Slider(this));
+  l->addWidget(slider = new Slider(w));
   slider->setSingleStep(0);
 
   setMaximumTime(can->totalSeconds());
@@ -293,9 +293,9 @@ void Slider::mouseMoveEvent(QMouseEvent *e) {
   double seconds = (minimum() + pos * ((maximum() - minimum()) / (double)width())) / factor;
   QPixmap thumb = thumbnail(seconds);
   if (!thumb.isNull()) {
-    int x = std::clamp(pos - thumb.width() / 2, THUMBNAIL_MARGIN, rect().right() - thumb.width() - THUMBNAIL_MARGIN);
-    int y = -thumb.height();
-    thumbnail_label.showPixmap(mapToParent({x, y}), utils::formatSeconds(seconds), thumb, alertInfo(seconds));
+    int x = std::clamp(pos - thumb.width() / 2, THUMBNAIL_MARGIN, width() - thumb.width() - THUMBNAIL_MARGIN + 1);
+    int y = -thumb.height() - THUMBNAIL_MARGIN - 6;
+    thumbnail_label.showPixmap(mapToParent(QPoint(x, y)), utils::formatSeconds(seconds), thumb, alertInfo(seconds));
   } else {
     thumbnail_label.hide();
   }