#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QToolButton>
#include <QTreeWidget>

#include <QGraphicsRectItem>
#include <QGraphicsEllipseItem>

#include <QXmlStreamReader>
#include <QXmlStreamWriter>

namespace Ui {
class MainWindow;
}


class Shape
{
   public:
       virtual void readXmlShape (QXmlStreamReader & r) { }
   protected:
};

class Ellipse : public QGraphicsEllipseItem, public Shape
{
public:
    virtual void readXmlShape (QXmlStreamReader & r);
    virtual void writeXmlShape (QXmlStreamWriter & r);
protected:
    virtual void dragEnterEvent (QGraphicsSceneDragDropEvent *event) override;
    virtual void dropEvent (QGraphicsSceneDragDropEvent *event) override;

public:
    Ellipse ();
};

class Rectangle : public QGraphicsRectItem, public Shape
{
public:
    virtual void readXmlShape (QXmlStreamReader & r);
    virtual void writeXmlShape (QXmlStreamWriter & r);
protected:
    virtual void dragEnterEvent (QGraphicsSceneDragDropEvent *event) override;
    virtual void dropEvent (QGraphicsSceneDragDropEvent *event) override;

public:
    Rectangle ();
};

class ColorButton : public QToolButton
{
private:
    QColor color;
public:
    ColorButton (QColor c);
protected:
    virtual void mousePressEvent(QMouseEvent *event) override;
};

class TreeItem : public QTreeWidgetItem
{
public:
    QGraphicsItem * obj;
    TreeItem () : obj (nullptr) { }
};

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
    void on_action_Quit_triggered();

    void on_action_Run_triggered();

    void on_treeWidget_itemClicked(QTreeWidgetItem *item, int column);

    void on_actionSave_triggered();

    void on_actionOpen_triggered();

private:
    Ui::MainWindow *ui;
    void showText(int line, QString name, QString value);
    void showColor(int line, QString name, QColor value);
    void showNumber(int line, QString name, int value);
    void readXml (QXmlStreamReader & r);
    void writeXml (QXmlStreamWriter &w);
};

#endif // MAINWINDOW_H