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progdlgg.cpp
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2002-09-04
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/////////////////////////////////////////////////////////////////////////////
// Name: progdlgg.h
// Purpose: wxProgressDialog class
// Author: Karsten Ballⁿder
// Modified by:
// Created: 09.05.1999
// RCS-ID: $Id: progdlgg.cpp,v 1.62 2002/09/01 17:02:36 JS Exp $
// Copyright: (c) Karsten Ballⁿder
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "progdlgg.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_PROGRESSDLG
#ifndef WX_PRECOMP
#include "wx/utils.h"
#include "wx/frame.h"
#include "wx/button.h"
#include "wx/stattext.h"
#include "wx/layout.h"
#include "wx/event.h"
#include "wx/gauge.h"
#include "wx/intl.h"
#include "wx/settings.h"
#include "wx/dcclient.h"
#include "wx/timer.h"
#endif
#include "wx/generic/progdlgg.h"
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
#define LAYOUT_X_MARGIN 8
#define LAYOUT_Y_MARGIN 8
// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------
// update the label to show the given time (in seconds)
static void SetTimeLabel(unsigned long val, wxStaticText *label);
// ----------------------------------------------------------------------------
// event tables
// ----------------------------------------------------------------------------
BEGIN_EVENT_TABLE(wxProgressDialog, wxDialog)
EVT_BUTTON(wxID_CANCEL, wxProgressDialog::OnCancel)
EVT_CLOSE(wxProgressDialog::OnClose)
END_EVENT_TABLE()
IMPLEMENT_CLASS(wxProgressDialog, wxDialog)
// ============================================================================
// wxProgressDialog implementation
// ============================================================================
// ----------------------------------------------------------------------------
// wxProgressDialog creation
// ----------------------------------------------------------------------------
wxProgressDialog::wxProgressDialog(wxString const &title,
wxString const &message,
int maximum,
wxWindow *parent,
int style)
: wxDialog(parent, -1, title)
{
// we may disappear at any moment, let the others know about it
SetExtraStyle(GetExtraStyle() | wxWS_EX_TRANSIENT);
m_windowStyle |= style;
bool hasAbortButton = (style & wxPD_CAN_ABORT) != 0;
#if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
// we have to remove the "Close" button from the title bar then as it is
// confusing to have it - it doesn't work anyhow
//
// FIXME: should probably have a (extended?) window style for this
if ( !hasAbortButton )
{
EnableCloseButton(FALSE);
}
#endif // wxMSW
m_state = hasAbortButton ? Continue : Uncancelable;
m_maximum = maximum;
#if defined(__WXMSW__) || defined(__WXPM__)
// we can't have values > 65,536 in the progress control under Windows, so
// scale everything down
m_factor = m_maximum / 65536 + 1;
m_maximum /= m_factor;
#endif // __WXMSW__
m_parentTop = parent;
while ( m_parentTop && m_parentTop->GetParent() )
{
m_parentTop = m_parentTop->GetParent();
}
wxLayoutConstraints *c;
wxClientDC dc(this);
dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
long widthText;
dc.GetTextExtent(message, &widthText, NULL, NULL, NULL, NULL);
m_msg = new wxStaticText(this, -1, message);
c = new wxLayoutConstraints;
c->left.SameAs(this, wxLeft, 2*LAYOUT_X_MARGIN);
c->top.SameAs(this, wxTop, 2*LAYOUT_Y_MARGIN);
c->width.AsIs();
c->height.AsIs();
m_msg->SetConstraints(c);
wxSize sizeDlg,
sizeLabel = m_msg->GetSize();
sizeDlg.y = 2*LAYOUT_Y_MARGIN + sizeLabel.y;
wxWindow *lastWindow = m_msg;
if ( maximum > 0 )
{
// note that we can't use wxGA_SMOOTH because it happens to also mean
// wxDIALOG_MODAL and will cause the dialog to be modal. Have an extra
// style argument to wxProgressDialog, perhaps.
m_gauge = new wxGauge(this, -1, m_maximum,
wxDefaultPosition, wxDefaultSize,
wxGA_HORIZONTAL);
c = new wxLayoutConstraints;
c->left.SameAs(this, wxLeft, 2*LAYOUT_X_MARGIN);
c->top.Below(m_msg, 2*LAYOUT_Y_MARGIN);
c->right.SameAs(this, wxRight, 2*LAYOUT_X_MARGIN);
c->height.AsIs();
m_gauge->SetConstraints(c);
m_gauge->SetValue(0);
lastWindow = m_gauge;
wxSize sizeGauge = m_gauge->GetSize();
sizeDlg.y += 2*LAYOUT_Y_MARGIN + sizeGauge.y;
}
else
m_gauge = (wxGauge *)NULL;
// create the estimated/remaining/total time zones if requested
m_elapsed = m_estimated = m_remaining = (wxStaticText*)NULL;
// if we are going to have at least one label, remmeber it in this var
wxStaticText *label = NULL;
// also count how many labels we really have
size_t nTimeLabels = 0;
if ( style & wxPD_ELAPSED_TIME )
{
nTimeLabels++;
label =
m_elapsed = CreateLabel(_("Elapsed time : "), &lastWindow);
}
if ( style & wxPD_ESTIMATED_TIME )
{
nTimeLabels++;
label =
m_estimated = CreateLabel(_("Estimated time : "), &lastWindow);
}
if ( style & wxPD_REMAINING_TIME )
{
nTimeLabels++;
label =
m_remaining = CreateLabel(_("Remaining time : "), &lastWindow);
}
if ( nTimeLabels > 0 )
{
// set it to the current time
m_timeStart = wxGetCurrentTime();
sizeDlg.y += nTimeLabels * (label->GetSize().y + LAYOUT_Y_MARGIN);
}
if ( hasAbortButton )
{
m_btnAbort = new wxButton(this, wxID_CANCEL, _("Cancel"));
c = new wxLayoutConstraints;
// Windows dialogs usually have buttons in the lower right corner
#if defined(__WXMSW__) || defined(__WXPM__)
c->right.SameAs(this, wxRight, 2*LAYOUT_X_MARGIN);
#else // !MSW
c->centreX.SameAs(this, wxCentreX);
#endif // MSW/!MSW
c->bottom.SameAs(this, wxBottom, 2*LAYOUT_Y_MARGIN);
c->width.AsIs();
c->height.AsIs();
m_btnAbort->SetConstraints(c);
sizeDlg.y += 2*LAYOUT_Y_MARGIN + wxButton::GetDefaultSize().y;
}
else // no "Cancel" button
{
m_btnAbort = (wxButton *)NULL;
}
SetAutoLayout(TRUE);
Layout();
sizeDlg.y += 2*LAYOUT_Y_MARGIN;
// try to make the dialog not square but rectangular of reasonabel width
sizeDlg.x = (wxCoord)wxMax(widthText, 4*sizeDlg.y/3);
sizeDlg.x *= 3;
sizeDlg.x /= 2;
SetClientSize(sizeDlg);
Centre(wxCENTER_FRAME | wxBOTH);
if ( style & wxPD_APP_MODAL )
{
m_winDisabler = new wxWindowDisabler(this);
}
else
{
if ( m_parentTop )
m_parentTop->Enable(FALSE);
m_winDisabler = NULL;
}
Show(TRUE);
Enable(TRUE); // enable this window
// this one can be initialized even if the others are unknown for now
//
// NB: do it after calling Layout() to keep the labels correctly aligned
if ( m_elapsed )
{
SetTimeLabel(0, m_elapsed);
}
// Update the display (especially on X, GTK)
wxYield();
#ifdef __WXMAC__
MacUpdateImmediately();
#endif
}
wxStaticText *wxProgressDialog::CreateLabel(const wxString& text,
wxWindow **lastWindow)
{
wxLayoutConstraints *c;
wxStaticText *label = new wxStaticText(this, -1, _("unknown"));
c = new wxLayoutConstraints;
// VZ: I like the labels be centered - if the others don't mind, you may
// remove "#ifdef __WXMSW__" and use it for all ports
#if defined(__WXMSW__) || defined(__WXPM__)
c->left.SameAs(this, wxCentreX, LAYOUT_X_MARGIN);
#else // !MSW
c->right.SameAs(this, wxRight, 2*LAYOUT_X_MARGIN);
#endif // MSW/!MSW
c->top.Below(*lastWindow, LAYOUT_Y_MARGIN);
c->width.AsIs();
c->height.AsIs();
label->SetConstraints(c);
wxStaticText *dummy = new wxStaticText(this, -1, text);
c = new wxLayoutConstraints;
c->right.LeftOf(label);
c->top.SameAs(label, wxTop, 0);
c->width.AsIs();
c->height.AsIs();
dummy->SetConstraints(c);
*lastWindow = label;
return label;
}
// ----------------------------------------------------------------------------
// wxProgressDialog operations
// ----------------------------------------------------------------------------
bool
wxProgressDialog::Update(int value, const wxString& newmsg)
{
wxASSERT_MSG( value == -1 || m_gauge, wxT("cannot update non existent dialog") );
#ifdef __WXMSW__
value /= m_factor;
#endif // __WXMSW__
wxASSERT_MSG( value <= m_maximum, wxT("invalid progress value") );
if ( m_gauge )
{
m_gauge->SetValue(value + 1);
}
if ( !newmsg.IsEmpty() )
{
m_msg->SetLabel(newmsg);
wxYield();
}
if ( (m_elapsed || m_remaining || m_estimated) && (value != 0) )
{
unsigned long elapsed = wxGetCurrentTime() - m_timeStart;
unsigned long estimated = elapsed * m_maximum / value;
unsigned long remaining = estimated - elapsed;
SetTimeLabel(elapsed, m_elapsed);
SetTimeLabel(estimated, m_estimated);
SetTimeLabel(remaining, m_remaining);
}
if ( value == m_maximum )
{
// so that we return TRUE below and that out [Cancel] handler knew what
// to do
m_state = Finished;
if( !(GetWindowStyle() & wxPD_AUTO_HIDE) )
{
if ( m_btnAbort )
{
// tell the user what he should do...
m_btnAbort->SetLabel(_("Close"));
}
#if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
else // enable the button to give the user a way to close the dlg
{
EnableCloseButton(TRUE);
}
#endif // __WXMSW__
if ( !newmsg )
{
// also provide the finishing message if the application didn't
m_msg->SetLabel(_("Done."));
}
wxYield();
(void)ShowModal();
}
else // auto hide
{
// reenable other windows before hiding this one because otherwise
// Windows wouldn't give the focus back to the window which had
// been previously focused because it would still be disabled
ReenableOtherWindows();
Hide();
}
}
else
{
// update the display
wxYield();
}
#ifdef __WXMAC__
MacUpdateImmediately();
#endif
return m_state != Canceled;
}
void wxProgressDialog::Resume()
{
m_state = Continue;
// it may have been disabled by OnCancel(), so enable it back to let the
// user interrupt us again if needed
m_btnAbort->Enable();
}
// ----------------------------------------------------------------------------
// event handlers
// ----------------------------------------------------------------------------
void wxProgressDialog::OnCancel(wxCommandEvent& event)
{
if ( m_state == Finished )
{
// this means that the count down is already finished and we're being
// shown as a modal dialog - so just let the default handler do the job
event.Skip();
}
else
{
// request to cancel was received, the next time Update() is called we
// will handle it
m_state = Canceled;
// update the button state immediately so that the user knows that the
// request has been noticed
m_btnAbort->Disable();
}
}
void wxProgressDialog::OnClose(wxCloseEvent& event)
{
if ( m_state == Uncancelable )
{
// can't close this dialog
event.Veto(TRUE);
}
else if ( m_state == Finished )
{
// let the default handler close the window as we already terminated
event.Skip();
}
else
{
// next Update() will notice it
m_state = Canceled;
}
}
// ----------------------------------------------------------------------------
// destruction
// ----------------------------------------------------------------------------
wxProgressDialog::~wxProgressDialog()
{
// normally this should have been already done, but just in case
ReenableOtherWindows();
}
void wxProgressDialog::ReenableOtherWindows()
{
if ( GetWindowStyle() & wxPD_APP_MODAL )
{
delete m_winDisabler;
m_winDisabler = (wxWindowDisabler *)NULL;
}
else
{
if ( m_parentTop )
m_parentTop->Enable(TRUE);
}
}
// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------
static void SetTimeLabel(unsigned long val, wxStaticText *label)
{
if ( label )
{
wxString s;
unsigned long hours = val / 3600;
unsigned long minutes = (val % 3600) / 60;
unsigned long seconds = val % 60;
s.Printf(wxT("%lu:%02lu:%02lu"), hours, minutes, seconds);
if ( s != label->GetLabel() )
label->SetLabel(s);
}
}
#endif // wxUSE_PROGRESSDLG