mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class QMdiArea;
class QLineEdit;
class ImageWidget;

class MainWindow : public QMainWindow
{
    Q_OBJECT

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

protected:
    void dragEnterEvent(QDragEnterEvent *event);
    void dropEvent(QDropEvent *event);

signals:
    void editMagnificationChanged(qreal m);

private slots:
    void open();
    void openClipboard();
    void saveAs();
    void undo();
    void redo();
    void copy();
    void paste();
    void filterGrayscale();
    void filterTo1Bit();
    void linearFilter();
    void medianFilter();
    void normFilter();
    void filterInsertRandomNoise();
    void zoomIn();
    void zoomOut();
    void zoomFullScale();
    void setAutoImageResize(bool yes);
    void setTabVisible(bool view);
    void about();
    void aboutQt();
    void updateMenus();
    void setEditMagnification(qreal m);
    void setMagnificationFromEdit();

private:
    ImageWidget *createImageWidget();
    ImageWidget *activeImageWidget() const;
    void load(const QString &filePath);
    void resizeAndShowSubWidget(ImageWidget *widget, bool maximize);
    bool activeSubWindowIsMaximized() const;

    Ui::MainWindow *ui;
    QMdiArea *mdiArea;
    QLineEdit *editMagnification;
    ImageWidget *m_activeWindow;

};

#endif // MAINWINDOW_H