#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QDialog>
#include <QWindow>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class RasterWindow : public QWindow
{
    Q_OBJECT
public:
    explicit RasterWindow(QWindow *parent = 0);

    virtual void render(QPainter *painter);

public slots:
    void renderLater();
    void renderNow();

protected:
    bool event(QEvent *event) override;

    void resizeEvent(QResizeEvent *event) override;
    void exposeEvent(QExposeEvent *event) override;

private:
    QBackingStore *m_backingStore;
};

class ColorWidget : public QWidget
{
public:
    ColorWidget(QWidget * parent=nullptr);

    void setColor(const QColor & c);

protected:
    void paintEvent(QPaintEvent *event) override;

private:
    QColor m_color;
};

class MainWindow : public QDialog
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

protected:
    void resizeEvent(QResizeEvent *) override;

private:
    RasterWindow * m_red;
    QWidget * m_red_widget;
    ColorWidget * m_yellow;
    ColorWidget * m_blue;
    ColorWidget * m_green;
};
#endif // MAINWINDOW_H