Move all files under src/

src/ui/LoadingIndicator.cpp

@@ -0,0 +1,85 @@
+#include "LoadingIndicator.h"
+
+#include <QPoint>
+#include <QtGlobal>
+
+LoadingIndicator::LoadingIndicator(QWidget *parent)
+  : QWidget(parent)
+  , interval_(70)
+  , angle_(0)
+  , color_(Qt::black)
+{
+        setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+        setFocusPolicy(Qt::NoFocus);
+
+        timer_ = new QTimer();
+        connect(timer_, SIGNAL(timeout()), this, SLOT(onTimeout()));
+}
+
+LoadingIndicator::~LoadingIndicator()
+{
+        stop();
+
+        delete timer_;
+}
+
+void
+LoadingIndicator::paintEvent(QPaintEvent *e)
+{
+        Q_UNUSED(e)
+
+        if (!timer_->isActive())
+                return;
+
+        QPainter painter(this);
+        painter.setRenderHint(QPainter::Antialiasing);
+
+        int width = qMin(this->width(), this->height());
+
+        int outerRadius = (width - 4) * 0.5f;
+        int innerRadius = outerRadius * 0.78f;
+
+        int capsuleRadius = (outerRadius - innerRadius) / 2;
+
+        for (int i = 0; i < 8; ++i) {
+                QColor color = color_;
+
+                color.setAlphaF(1.0f - (i / 8.0f));
+
+                painter.setPen(Qt::NoPen);
+                painter.setBrush(color);
+
+                qreal radius = capsuleRadius * (1.0f - (i / 16.0f));
+
+                painter.save();
+
+                painter.translate(rect().center());
+                painter.rotate(angle_ - i * 45.0f);
+
+                QPointF center = QPointF(-capsuleRadius, -innerRadius);
+                painter.drawEllipse(center, radius * 2, radius * 2);
+
+                painter.restore();
+        }
+}
+
+void
+LoadingIndicator::start()
+{
+        timer_->start(interval_);
+        show();
+}
+
+void
+LoadingIndicator::stop()
+{
+        timer_->stop();
+        hide();
+}
+
+void
+LoadingIndicator::onTimeout()
+{
+        angle_ = (angle_ + 45) % 360;
+        update();
+}