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//  w32dlib - Win32 Dialog Helpers
//
//  Copyright (C) 2005  Ian Cowburn (ianc@noddybox.demon.co.uk)
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//  -------------------------------------------------------------------------
//
#ifndef W32DLIB_DIALOG_H

#define W32DLIB_DIALOG_H "$Id$"

#include "w32dlib/base.h"

namespace W32DLib
{
    /// \brief The base Dialog class.
    ///
    class Dialog : public Window
    {
    public:

	/// \brief Constructor
	///
	Dialog();

	/// \brief Destructor
	///
	virtual ~Dialog();

	/// \brief Returns the Resource ID for the dialog.
	///
	/// All derived classes must implement this.  This should return
	/// the ID of the dialog in the resource file.
	///
	virtual int	ResourceID()=0;

	/// \brief Called when the dialog is displaying.
	///
	/// Override this call to initialise dialog controls.
	///
	virtual void	OnInit();

	/// \brief Called when the dialog is closing.
	///
	/// Override this call to pick up this event.
	///
	virtual void	OnClose();

	/// \brief Enables or disables all Controls in the dialog.
	///
	/// Overrides Window::Enable.
	///
	void		Enable(bool enable);

	/// \brief Displays a modal dialog.
	///
	/// Call this to display the dialog.
	///
	/// \param instance The HINSTANCE.  Call Common::GetInstance()
	///  to get an instance (from a DLL, for example) if all else fails.
	/// \param parent The parent window of the dialog (NULL for none).
	/// \return The result from Close().
	/// \sa Close()
	/// \sa Common::GetInstance()
	///
	INT_PTR		ShowModal(HINSTANCE instance, HWND parent);

	/// \brief Closes the dialog.
	///
	/// Closes the dialog.  Silently ignored if the dialog is not open.
	///
	/// \param result The result to return.
	/// \sa ShowModal()
	///
	void		Close(INT_PTR result);

	/// \brief Adds a control to the dialog.
	///
	/// Note that the pointer to the control is stored, so the control
	/// must exist as long as the dialog is in use.
	///
	/// \param control The control the add.
	///
	void		AddControl(Control *control);

	/// \brief Sets a callback for handling menu commands.
	///
	/// This call simply passes on all WM_COMMAND messages that were not
	/// for any registered control's resource ID.
	///
	/// Due to this, the callback should take care to ensure it only
	/// actions recognised menu commands.
	///
	/// \param owner The class (generally a Dialog derived one) in which
	///  the callback resides.  The class must be derived from
	///  Window.
	/// \param callback The callback.
	///
	void		SetMenuProc(Window *owner, W32DLibCallback callback);

	/// \brief Request data exchange with all controls.
	///
	/// Values will be set from DataX objects registered with the controls.
	///
	/// This shouldn't be called any earlier than when OnInit() is invoked.
	///
	void		SetData();

	/// \brief Request data exchange with all controls.
	///
	/// Values will be stored in the DataX objects registered with the
	/// controls.
	///
	/// This shouldn't be called any earlier than when OnInit() is invoked.
	///
	void		GetData();


    protected:

	/// \brief Handles windows messages.
	///
	/// \param wnd The window handle
	/// \param msg The message
	/// \param wp Additional parameters.  Depends on the value of msg.
	/// \param lp Additional parameters.  Depends on the value of msg.
	/// \return TRUE if the message has been handled.
	/// \sa Window::InstanceProc
	///
	virtual BOOL 	InstanceProc(HWND wnd,
				     UINT msg,
				     WPARAM wp,
				     LPARAM lp);
    private:

	typedef std::vector<Control*> ControlSet;

	Window		*m_menuowner;
	W32DLibCallback	m_menuproc;

	bool		m_open;
	ControlSet	m_cset;

    };	// class Dialog

};	// namespace w32dlib

#endif	// W32DLIB_DIALOG_H


// END OF FILE