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Improve empty instance list label #2141

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merged 1 commit into from
Feb 22, 2024
Merged

Improve empty instance list label #2141

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56 changes: 33 additions & 23 deletions launcher/ui/instanceview/InstanceView.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -482,32 +482,42 @@ void InstanceView::paintEvent([[maybe_unused]] QPaintEvent* event)

if (model()->rowCount() == 0) {
painter.save();
const QString line1 = tr("Welcome!");
const QString line2 = tr("Click \"Add Instance\" to get started.");
auto rect = this->viewport()->rect();
auto font = option.font;
font.setPointSize(37);
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 fm = painter.fontMetrics();

if (rect.height() <= (fm.height() * 5) || rect.width() <= fm.horizontalAdvance(line2)) {
auto s = rect.height() / (5. * fm.height());
auto sx = rect.width() * 1. / fm.horizontalAdvance(line2);
if (s >= sx)
s = sx;
auto ps = font.pointSize() * s;
if (ps <= 0)
ps = 1;
font.setPointSize(ps);
painter.setFont(font);
fm = painter.fontMetrics();
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;
}

// text
rect.setTop(rect.top() + fm.height() * 1.5);
painter.drawText(rect, Qt::AlignHCenter, line1);
rect.setTop(rect.top() + fm.height());
painter.drawText(rect, Qt::AlignHCenter, line2);
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;
}
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