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// This file is part of the free Filer module for RISC OS.
// Copyright © 2007 Graham Shaw.
// Redistribution and modification are permitted under the terms of the
// GNU General Public License (version 2 or any later version).

#ifndef FILER_FILER_WINDOW
#define FILER_FILER_WINDOW

#include "directory.h"
#include "auto_pos.h"
#include "window.h"
#include "filer_options.h"

class filer_menu;
class filer_application;

/** A class to represent a filer window. */
class filer_window:
        public window
{
private:
        /** The pathname of the directory to be viewed by the filer window. */
        char* _pathname;

        /** The options applicable to this window. */
        filer_options _options;

        /** The content of the directory. */
        directory _directory;

        /** The width of one cell. */
        int _xcsize;

        /** The height of one cell. */
        int _ycsize;

        /** The number of columns. */
        int _xccount;

        /** The number of rows. */
        int _yccount;

        /** The index of the cell temporarily selected while a menu is open,
         * or directory::npos if none. */

        directory::size_type _temp_selection;

        /** The position at which a filer window for a subdirectory will be
         * opened. */

        auto_pos _auto_pos;
public:
        /** Construct filer window.
         * @param app the application to which this filer window belongs
         * @param pathname the pathname of the directory to be viewed
         * @param box the initial bounding box of the window
         * @param options the initial options for the filer window
         */

        filer_window(filer_application* app,const char* pathname,
                const os_box& box,const filer_options& options);

        /** Destroy filer window. */
        ~filer_window();

        virtual void handle_redraw_request(wimp_draw& block);
        virtual void handle_open_request(wimp_open& block);
        virtual void handle_close_request(wimp_close& block);
        virtual void handle_mouse_click(wimp_pointer& block);

        /** Handle menus deleted event.
         * The event should already have been handled by the menu itself.
         */

        void handle_menus_deleted();

        /** Get pathname.
         * @return the pathname of the directory viewed by this filer window
         */

        const char* pathname() const
                { return _pathname; }

        /** Get filer options.
         * @return the filer options applicable to this window
         */

        const filer_options& options() const
                { return _options; }

        /** Set filer options.
         * @param options the required filer options
         */

        void options(const filer_options& options);

        /** Get selection.
         * @return the content of this directory, with selected objected marked
         */

        directory& selection()
                { return _directory; }

        /** Get temporary selection.
         * An object is temporarily selected if the user clicks menu above it
         * when no other objects are selected.  It is automatically deselected
         * when that menu is closed.
         * @return the index of the object temporarily selected,
         *  or directory::npos if none
         */

        int temp_selection() const
                { return _temp_selection; }
private:
        /** Get shared menu.
         * One copy of the menu is shared between all filer windows.
         * @return a reference to the shared menu
         */

        filer_menu& shared_menu() const;

        /** Reload directory listing. */
        void reload();

        /** Reformat content of window. */
        void reformat();

        /** Reformat content of window to given width.
         * @param xsize the required width
         */

        void reformat(int xsize);

        /** Find the cell which contains a given point.
         * @param p the point to be found
         * @return the cell index if found, otherwise npos
         */

        unsigned int find_cell(const os_coord& p);

        /** Force a redraw of a given cell.
         * @param index the index of the cell to be redrawn
         */

        void force_redraw_cell(unsigned int index);
public:
        /** Refresh window.
         * The directory is re-read from disc.  The current selection is
         * preserved so far as is possible.
         */

        void refresh();

        /** Select or deselect all objects
         * @param selected the required selection state
         */

        void select_all(int selected);

        /** Open filer window for parent directory.
         * @param offset the position at which to open the top left-hand
         *  corner of the new filer window, with respect to the top left-hand
         *  corner of this one
         */

        void open_parent(const os_coord& offset) const;

        /** Run object
         * Note that setting the close parameter does not actually cause
         * the parent window to be closed, however the information is
         * needed because it affected the location at which a child
         * directory is opened.
         * @param info the directory entry for the object to be run
         * @param close true if the parent window is to be closed, otherwise false
         * @param shift true if shift was pressed, otherwise false
         */

        void run(osgbpb_info& info,int close,int shift);
};

#endif