Add WarningLabel and WarningMessageWidget to App, and add some reference event to EventCenter

src/components/WarningLabel.h

@@ -0,0 +1,24 @@
+#ifndef _GUI_WARNINGLABEL_H__
+#define _GUI_WARNINGLABEL_H__
+#include <QWidget>
+#include <QString>
+
+
+enum WarningType{
+    ERROR, WARNING
+};
+
+class WarningLabel: public QWidget {
+Q_OBJECT
+public:
+    explicit WarningLabel(QWidget *aParent, WarningType aType,const QString& aMessageTime, const QString& content);
+    ~WarningLabel() =default;
+protected:
+    void paintEvent(QPaintEvent * aEvent);
+
+
+private:
+
+};
+
+#endif // __WARNINGLABEL_H__