Implement some overlay functions and on_map_opened callback

include/ui/graphicsview.h

@@ -1,6 +1,7 @@
 #ifndef GRAPHICSVIEW_H
 #define GRAPHICSVIEW_H
 
+#include "overlay.h"
 #include <QGraphicsView>
 #include <QMouseEvent>
 
@@ -15,10 +16,12 @@ public:
 public:
 //    GraphicsView_Object object;
     Editor *editor;
+    Overlay overlay;
 protected:
     void mousePressEvent(QMouseEvent *event);
     void mouseMoveEvent(QMouseEvent *event);
     void mouseReleaseEvent(QMouseEvent *event);
+    void drawForeground(QPainter *painter, const QRectF &rect);
 };
 
 //Q_DECLARE_METATYPE(GraphicsView)

include/ui/overlay.h

@@ -0,0 +1,87 @@
+#ifndef OVERLAY_H
+#define OVERLAY_H
+
+#include <QList>
+#include <QString>
+#include <QColor>
+#include <QPainter>
+
+class OverlayItem {
+public:
+    OverlayItem() {}
+    virtual ~OverlayItem() {};
+    virtual void render(QPainter *painter) {};
+};
+
+class OverlayText : public OverlayItem {
+public:
+    OverlayText(QString text, int x, int y, QColor color, int fontSize) {
+        this->text = text;
+        this->x = x;
+        this->y = y;
+        this->color = color;
+        this->fontSize = fontSize;
+    }
+    ~OverlayText() {}
+    virtual void render(QPainter *painter);
+private:
+    QString text;
+    int x;
+    int y;
+    QColor color;
+    int fontSize;
+};
+
+class OverlayRect : public OverlayItem {
+public:
+    OverlayRect(int x, int y, int width, int height, QColor color, bool filled) {
+        this->x = x;
+        this->y = y;
+        this->width = width;
+        this->height = height;
+        this->color = color;
+        this->filled = filled;
+    }
+    ~OverlayRect() {}
+    virtual void render(QPainter *painter);
+private:
+    int x;
+    int y;
+    int width;
+    int height;
+    QColor color;
+    bool filled;
+};
+
+class OverlayImage : public OverlayItem {
+public:
+    OverlayImage(int x, int y, QImage image) {
+        this->x = x;
+        this->y = y;
+        this->image = image;
+    }
+    ~OverlayImage() {}
+    virtual void render(QPainter *painter);
+private:
+    int x;
+    int y;
+    QImage image;
+};
+
+class Overlay
+{
+public:
+    Overlay() {}
+    ~Overlay() {
+        this->clearItems();
+    }
+    QList<OverlayItem*> getItems();
+    void clearItems();
+    void addText(QString text, int x, int y, QString color = "#000000", int fontSize = 12);
+    void addRect(int x, int y, int width, int height, QString color = "#000000", bool filled = false);
+    void addImage(int x, int y, QString filepath);
+private:
+    QList<OverlayItem*> items;
+};
+
+#endif // OVERLAY_H