Add ImageItem.

src/imageitem.h

@@ -0,0 +1,42 @@
+#ifndef IMAGEITEM_H
+#define IMAGEITEM_H
+
+#include <QImage>
+#include <QObject>
+#include <QPainter>
+#include <QQuickItem>
+#include <QQuickPaintedItem>
+
+class ImageItem : public QQuickPaintedItem {
+  Q_OBJECT
+  Q_PROPERTY(QImage image READ image WRITE setImage NOTIFY imageChanged)
+  Q_PROPERTY(QString hint READ hint WRITE setHint NOTIFY hintChanged)
+  Q_PROPERTY(QString defaultColor READ defaultColor WRITE setDefaultColor NOTIFY
+                 defaultColorChanged)
+
+ public:
+  ImageItem(QQuickItem *parent = nullptr);
+
+  void paint(QPainter *painter);
+
+  QImage image() const { return m_image; }
+  void setImage(const QImage &image);
+
+  QString hint() { return m_hint; }
+  void setHint(QString hint);
+
+  QString defaultColor() { return m_color; }
+  void setDefaultColor(QString color);
+
+ signals:
+  void imageChanged();
+  void hintChanged();
+  void defaultColorChanged();
+
+ private:
+  QImage m_image;
+  QString m_hint;
+  QString m_color = "#000000";
+};
+
+#endif  // IMAGEITEM_H