Add spinner to hide uninitialized layout after login

include/ui/CircularProgress.h

@@ -0,0 +1,114 @@
+#ifndef UI_CIRCULAR_PROGRESS_H
+#define UI_CIRCULAR_PROGRESS_H
+
+#include <QObject>
+#include <QProgressBar>
+
+#include "Theme.h"
+
+class CircularProgressDelegate;
+
+class CircularProgress : public QProgressBar
+{
+	Q_OBJECT
+
+	Q_PROPERTY(qreal lineWidth WRITE setLineWidth READ lineWidth)
+	Q_PROPERTY(qreal size WRITE setSize READ size)
+	Q_PROPERTY(QColor color WRITE setColor READ color)
+
+public:
+	explicit CircularProgress(QWidget *parent = nullptr);
+	~CircularProgress();
+
+	void setProgressType(ui::ProgressType type);
+	void setLineWidth(qreal width);
+	void setSize(int size);
+	void setColor(const QColor &color);
+
+	ui::ProgressType progressType() const;
+	qreal lineWidth() const;
+	int size() const;
+	QColor color() const;
+
+	QSize sizeHint() const override;
+
+protected:
+	void paintEvent(QPaintEvent *event) override;
+
+private:
+	CircularProgressDelegate *delegate_;
+
+	ui::ProgressType progress_type_;
+
+	QColor color_;
+
+	// Circle width.
+	qreal width_;
+
+	// Circle radius.
+	int size_;
+};
+
+class CircularProgressDelegate : public QObject
+{
+	Q_OBJECT
+
+	Q_PROPERTY(qreal dashOffset WRITE setDashOffset READ dashOffset)
+	Q_PROPERTY(qreal dashLength WRITE setDashLength READ dashLength)
+	Q_PROPERTY(int angle WRITE setAngle READ angle)
+
+public:
+	explicit CircularProgressDelegate(CircularProgress *parent);
+	~CircularProgressDelegate();
+
+	inline void setDashOffset(qreal offset);
+	inline void setDashLength(qreal length);
+	inline void setAngle(int angle);
+
+	inline qreal dashOffset() const;
+	inline qreal dashLength() const;
+	inline int angle() const;
+
+private:
+	CircularProgress *const progress_;
+
+	qreal dash_offset_;
+	qreal dash_length_;
+
+	int angle_;
+};
+
+inline void CircularProgressDelegate::setDashOffset(qreal offset)
+{
+	dash_offset_ = offset;
+	progress_->update();
+}
+
+inline void CircularProgressDelegate::setDashLength(qreal length)
+{
+	dash_length_ = length;
+	progress_->update();
+}
+
+inline void CircularProgressDelegate::setAngle(int angle)
+{
+	angle_ = angle;
+	progress_->update();
+}
+
+inline qreal CircularProgressDelegate::dashOffset() const
+{
+	return dash_offset_;
+}
+
+inline qreal CircularProgressDelegate::dashLength() const
+{
+	return dash_length_;
+}
+
+inline int CircularProgressDelegate::angle() const
+{
+	return angle_;
+}
+
+#endif  // UI_CIRCULAR_PROGRESS_H