// TortoiseSVN - a Windows shell extension for easy version control

// Copyright (C) 2003-2007, 2010, 2012-2014, 2021 - TortoiseSVN

// 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,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#pragma once

/**
 * \ingroup Utils
 * A base window class.
 * Provides separate window message handlers for every window object based on
 * this class.
 */
class CDialog
{
public:
    virtual ~CDialog() = default;

    CDialog()
        : hResource(nullptr)
        , m_hwnd(nullptr)
        , m_bPseudoModal(false)
        , m_bPseudoEnded(false)
        , m_iPseudoRet(0)
        , m_hToolTips(nullptr)
    {
        ;
    }

    INT_PTR DoModal(HINSTANCE hInstance, int resID, HWND hWndParent);
    INT_PTR DoModal(HINSTANCE hInstance, int resID, HWND hWndParent, UINT idAccel);
    HWND    Create(HINSTANCE hInstance, int resID, HWND hWndParent);
    BOOL    EndDialog(HWND hDlg, INT_PTR nResult);
    void    AddToolTip(UINT ctrlID, LPWSTR text) const;

    virtual LRESULT CALLBACK DlgFunc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam) = 0;
    virtual bool             PreTranslateMessage(MSG* pMsg);

    operator HWND() const { return m_hwnd; }

protected:
    HINSTANCE hResource;
    HWND      m_hwnd;

    void InitDialog(HWND hwndDlg, UINT iconID) const;

    // the real message handler
    static INT_PTR CALLBACK stDlgFunc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam);

    // returns a pointer the dialog (stored as the WindowLong)
    static CDialog* GetObjectFromWindow(HWND hWnd)
    {
        return reinterpret_cast<CDialog*>(GetWindowLongPtr(hWnd, GWLP_USERDATA));
    }

private:
    bool    m_bPseudoModal;
    bool    m_bPseudoEnded;
    INT_PTR m_iPseudoRet;
    HWND    m_hToolTips;
};