wxWidgets/include/wx/generic/progdlgg.h

////////////////////////////////////////////////////
// Name:        progdlgg.h
// Purpose:     wxProgressDialog class
// Author:      Karsten Ballüder
// Modified by:
// Created:     09.05.1999
// RCS-ID:      $Id$
// Copyright:   (c) Karsten Ballüder
// Licence:     wxWindows licence
////////////////////////////////////////////////////

#ifndef __PROGDLGH_G__
#define __PROGDLGH_G__

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma interface "progdlgg.h"
#endif

#include "wx/setup.h"

#if wxUSE_PROGRESSDLG

#include "wx/dialog.h"

class WXDLLEXPORT wxButton;
class WXDLLEXPORT wxGauge;
class WXDLLEXPORT wxStaticText;

/* Progress dialog which shows a moving progress bar.
    Taken from the Mahogany project.*/

class WXDLLEXPORT wxProgressDialog : public wxDialog
{
DECLARE_DYNAMIC_CLASS(wxProgressDialog)
public:
   /* Creates and displays dialog, disables event handling for other
       frames or parent frame to avoid recursion problems.
       @param title title for window
       @param message message to display in window
       @param maximum value for status bar, if <= 0, no bar is shown
       @param parent window or NULL
       @param style is the bit mask of wxPD_XXX constants from wx/defs.h
   */
   wxProgressDialog(const wxString &title, wxString const &message,
                    int maximum = 100,
                    wxWindow *parent = NULL,
                    int style = wxPD_APP_MODAL | wxPD_AUTO_HIDE);
   /* Destructor.
       Re-enables event handling for other windows.
   */
   ~wxProgressDialog();

   /* Update the status bar to the new value.
       @param value new value
       @param newmsg if used, new message to display
       @returns true if ABORT button has not been pressed
   */
   virtual bool Update(int value, const wxString& newmsg = wxEmptyString);

   /* Can be called to continue after the cancel button has been pressed, but
       the program decided to continue the operation (e.g., user didn't
       confirm it)
   */
   void Resume();

   bool Show( bool show = true );

protected:
   // callback for optional abort button
   void OnCancel(wxCommandEvent& event);

   // callback to disable "hard" window closing
   void OnClose(wxCloseEvent& event);

   // must be called to reenable the other windows temporarily disabled while
   // the dialog was shown
   void ReenableOtherWindows();

private:
   // create the label with given text and another one to show the time nearby
   // as the next windows in the sizer, returns the created control
   wxStaticText *CreateLabel(const wxString& text, wxSizer *sizer);

   // the status bar
   wxGauge *m_gauge;
   // the message displayed
   wxStaticText *m_msg;
   // displayed elapsed, estimated, remaining time
   class wxStaticText *m_elapsed,
                      *m_estimated,
                      *m_remaining;
   // time when the dialog was created
   unsigned long m_timeStart;
   // time when the dialog was closed or cancelled
   unsigned long m_timeStop;
   // time between the moment the dialog was closed/cancelled and resume
   unsigned long m_break;

   // parent top level window (may be NULL)
   wxWindow *m_parentTop;

   // continue processing or not (return value for Update())
   enum
   {
      Uncancelable = -1,   // dialog can't be canceled
      Canceled,            // can be cancelled and, in fact, was
      Continue,            // can be cancelled but wasn't
      Finished             // finished, waiting to be removed from screen
   } m_state;

   // the abort button (or NULL if none)
   wxButton *m_btnAbort;

   // the maximum value
   int m_maximum;

   // saves the time when elapsed time was updated so there is only one
   // update per second
   unsigned long m_last_timeupdate;
   // tells how often a change of the estimated time has to be confirmed
   // before it is actually displayed - this reduces the frequence of updates
   // of estimated and remaining time
   const int m_delay;
   // counts the confirmations
   int m_ctdelay;
   unsigned long m_display_estimated;

#if defined(__WXMSW__ ) || defined(__WXPM__)
   // the factor we use to always keep the value in 16 bit range as the native
   // control only supports ranges from 0 to 65,535
   size_t m_factor;
#endif // __WXMSW__

   // for wxPD_APP_MODAL case
   class WXDLLEXPORT wxWindowDisabler *m_winDisabler;

   DECLARE_EVENT_TABLE()
private:
    // Virtual function hiding supression
    virtual void Update() { wxDialog::Update(); }

    DECLARE_NO_COPY_CLASS(wxProgressDialog)
};
#endif

#endif
    // __PROGDLGH_G__