#ifndef MAINWINDOW_HH
#define MAINWINDOW_HH

#include <QMainWindow>

#include "DiagramView.hh"

class QActionGroup;
class Selectable;

namespace Ui {
    class MainWindow;
}

/**
 * @todo docs
 **/
class MainWindow : public QMainWindow {

    Q_OBJECT

public:

    MainWindow(QWidget *parent = 0);
    ~MainWindow();


protected:

    void changeEvent(QEvent *e);

    /**
     * Event handler for close events. Saves the window size and position into settings.
     *
     * @param event not used.
     **/
    void closeEvent (QCloseEvent * event);


private slots:

    /**
     * Shows the given @p message in the status bar.
     *
     * @param message the message to show.
     * @param timeout optional timeout in ms or 0 for a permanent message.
     **/
    void showMessage (const QString & message, int timeout);

    /**
     * Callback for when the user has clicked something in the toolbar of available shapes. Sets a new mode for the diagram view
     * so that it knows what to do when it's clicked.
     *
     * @param action the triggered action
     **/
    void actionSelected (QAction * action);

    /**
     * Callback for when the diagram view has a new @p mode. Sets the select action to be active if the @p mode is back to
     * standard mode (nothing active).
     *
     * @param mode the new mode.
     **/
    void modeChanged (DiagramView::OperationMode mode);

    /**
     * Callback for when the user has clicked something in the diagram. Updates the edit panel to show the editor for the current @p selectable.
     * If there is no suitable editor part then the panel is made empty.
     *
     * @param selectable the clicked shape or 0 for no shape.
     **/
    void diagramShapeSelected (Selectable * selectable);

    /**
     * Callback for the @e New action. Asks the user for confirmation and then recreates the diagram, deleteing the old.
     **/
    void newDiagram ();

    /**
     * Callback for the @e Open action. Asks the user for the file to open and loads it if valid.
     **/
    void openDiagram ();

    /**
     * Callback for the @e Save action. If no filename has been set then calls saveDiagramAs() so get a filename.
     **/
    void saveDiagram ();

    /**
     * Callback for the @e Save @e As action. Calls saveDiagram() to do the real saving.
     **/
    void saveDiagramAs ();

    /**
     * Callback for the @e Validate action. Opens a validation dialog.
     **/
    void validate ();

    /**
     * Callback for the @e Generate action. Opens a code generation dialog.
     **/
    void generate ();

    /**
     * Callback for the @e About action. Opens an about dialog.
     **/
    void about ();

    /**
     * Callback for the @e Help action. Opens a browser for the homepage.
     **/
    void help ();


private:

    /**
     * Set up the action in the object toolbar. Sets some internal properties for the actions.
     **/
    void setupActions ();

    Ui::MainWindow *ui;

    //! the name of the current diagram file
    QString m_filename;

    //! a group for the state action in the toolbar
    QActionGroup * m_action_group;
};

#endif // MAINWINDOW_HH