feat: remove the welcome widget when there is no instances

Signed-off-by: windstone <notwindstone@gmail.com>

Author: notwindstone

launcher/ui/instanceview/InstanceView.cpp

@@ -574,44 +574,6 @@ void InstanceView::paintEvent([[maybe_unused]] QPaintEvent* event)
     option.widget = this;
 
     if (model()->rowCount() == 0) {
-        painter.save();
-        QString emptyString = tr("Welcome!") + "\n" + tr("Click \"Add Instance\" to get started.");
-
-        // calculate the rect for the overlay
-        painter.setRenderHint(QPainter::Antialiasing, true);
-        QFont font("sans", 20);
-        font.setBold(true);
-
-        QRect bounds = viewport()->geometry();
-        bounds.moveTop(0);
-        auto innerBounds = bounds;
-        innerBounds.adjust(10, 10, -10, -10);
-
-        QColor background = QApplication::palette().color(QPalette::WindowText);
-        QColor foreground = QApplication::palette().color(QPalette::Base);
-        foreground.setAlpha(190);
-        painter.setFont(font);
-        auto fontMetrics = painter.fontMetrics();
-        auto textRect = fontMetrics.boundingRect(innerBounds, Qt::AlignHCenter | Qt::TextWordWrap, emptyString);
-        textRect.moveCenter(bounds.center());
-
-        auto wrapRect = textRect;
-        wrapRect.adjust(-10, -10, 10, 10);
-
-        // check if we are allowed to draw in our area
-        if (!event->rect().intersects(wrapRect)) {
-            return;
-        }
-
-        painter.setBrush(QBrush(background));
-        painter.setPen(foreground);
-        painter.drawRoundedRect(wrapRect, 5.0, 5.0);
-
-        painter.setPen(foreground);
-        painter.setFont(font);
-        painter.drawText(textRect, Qt::AlignHCenter | Qt::TextWordWrap, emptyString);
-
-        painter.restore();
         return;
     }