1. Pause()/Resume() implemented for wxMSW

[wxWidgets.git] / src / motif / dialog.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        dialog.cpp
// Purpose:     wxDialog class
// Author:      Julian Smart
// Modified by:
// Created:     17/09/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "dialog.h"
#endif

#include "wx/dialog.h"
#include "wx/utils.h"
#include "wx/frame.h"
#include "wx/app.h"
#include "wx/settings.h"

#include <Xm/Xm.h>

#include <X11/Shell.h>
#if XmVersion >= 1002
#include <Xm/XmAll.h>
#endif
#include <Xm/MwmUtil.h>
#include <Xm/Label.h>
#include <Xm/BulletinB.h>
#include <Xm/Frame.h>
#include <Xm/Text.h>
#include <Xm/DialogS.h>
#include <Xm/FileSB.h>
#include <Xm/RowColumn.h>
#include <Xm/LabelG.h>
#include <Xm/AtomMgr.h>
#if   XmVersion > 1000
#include <Xm/Protocols.h>
#endif

#include "wx/motif/private.h"

static void wxCloseDialogCallback(Widget widget, XtPointer client_data, XmAnyCallbackStruct *cbs);
static void wxDialogBoxRepaintProc(Widget w, XtPointer c_data, XEvent *event, char *);
static void wxDialogBoxEventHandler (Widget    wid,
                              XtPointer client_data,
                              XEvent*   event,
                              Boolean *continueToDispatch);

static void wxUnmapBulletinBoard(Widget dialog, wxDialog *client,XtPointer call);

// A stack of modal_showing flags, since we can't rely
// on accessing wxDialog::m_modalShowing within
// wxDialog::Show in case a callback has deleted the wxDialog.
static wxList wxModalShowingStack;

// Lists to keep track of windows, so we can disable/enable them
// for modal dialogs
wxList wxModalDialogs;
wxList wxModelessWindows;  // Frames and modeless dialogs
extern wxList wxPendingDelete;

#define wxUSE_INVISIBLE_RESIZE 1

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxDialog, wxPanel)

BEGIN_EVENT_TABLE(wxDialog, wxPanel)
  EVT_BUTTON(wxID_OK, wxDialog::OnOK)
  EVT_BUTTON(wxID_APPLY, wxDialog::OnApply)
  EVT_BUTTON(wxID_CANCEL, wxDialog::OnCancel)
  EVT_CHAR_HOOK(wxDialog::OnCharHook)
  EVT_SYS_COLOUR_CHANGED(wxDialog::OnSysColourChanged)
  EVT_CLOSE(wxDialog::OnCloseWindow)
END_EVENT_TABLE()

#endif

wxDialog::wxDialog()
{
    m_modalShowing = FALSE;
    m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
}

bool wxDialog::Create(wxWindow *parent, wxWindowID id,
           const wxString& title,
           const wxPoint& pos,
           const wxSize& size,
           long style,
           const wxString& name)
{
    m_windowStyle = style;
    m_modalShowing = FALSE;
    m_dialogTitle = title;

    m_backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
    m_foregroundColour = *wxBLACK;

    SetName(name);
  
    if (!parent)
        wxTopLevelWindows.Append(this);

    if (parent) parent->AddChild(this);

    if ( id == -1 )
        m_windowId = (int)NewControlId();
    else
        m_windowId = id;

    Widget parentWidget = (Widget) 0;
    if (parent)
        parentWidget = (Widget) parent->GetTopWidget();
    if (!parent)
        parentWidget = (Widget) wxTheApp->GetTopLevelWidget();

    wxASSERT_MSG( (parentWidget != (Widget) 0), "Could not find a suitable parent shell for dialog." );

    Arg args[2];
    XtSetArg (args[0], XmNdefaultPosition, False);
    XtSetArg (args[1], XmNautoUnmanage, False);
    Widget dialogShell = XmCreateBulletinBoardDialog(parentWidget, (char*) (const char*) name, args, 2);
    m_mainWidget = (WXWidget) dialogShell;

    // We don't want margins, since there is enough elsewhere.
    XtVaSetValues(dialogShell,
          XmNmarginHeight,   0,
          XmNmarginWidth,    0,
          XmNresizePolicy, XmRESIZE_NONE,
          NULL) ;

    Widget shell = XtParent(dialogShell) ;
    if (!title.IsNull())
    {
        XmString str = XmStringCreateSimple((char*) (const char*)title);
        XtVaSetValues(dialogShell,
                      XmNdialogTitle, str,
                      NULL);
        XmStringFree(str);
    }

    m_windowFont = wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT);
    ChangeFont(FALSE);

    wxAddWindowToTable(dialogShell, this);

    // Intercept CLOSE messages from the window manager
    Atom WM_DELETE_WINDOW = XmInternAtom(XtDisplay(shell), "WM_DELETE_WINDOW", False);

    /* Remove and add WM_DELETE_WINDOW so ours is only handler */
    /* Why do we have to do this for wxDialog, but not wxFrame? */
    XmRemoveWMProtocols(shell, &WM_DELETE_WINDOW, 1);
    XmAddWMProtocols(shell, &WM_DELETE_WINDOW, 1);
    XmActivateWMProtocol(shell, WM_DELETE_WINDOW);

    // Modified Steve Hammes for Motif 2.0
#if (XmREVISION > 1 || XmVERSION > 1)
    XmAddWMProtocolCallback(shell, WM_DELETE_WINDOW, (XtCallbackProc) wxCloseDialogCallback, (XtPointer)this);
#elif XmREVISION == 1
    XmAddWMProtocolCallback(shell, WM_DELETE_WINDOW, (XtCallbackProc) wxCloseDialogCallback, (caddr_t)this);
#else
    XmAddWMProtocolCallback(shell, WM_DELETE_WINDOW, (void (*)())wxCloseDialogCallback, (caddr_t)this);
#endif

    XtTranslations ptr ;
    XtOverrideTranslations(dialogShell,
                ptr = XtParseTranslationTable("<Configure>: resize()"));
    XtFree((char *)ptr);

    // Can't remember what this was about... but I think it's necessary.

    if (wxUSE_INVISIBLE_RESIZE)
    {
      if (pos.x > -1)
        XtVaSetValues(dialogShell, XmNx, pos.x,
                    NULL);
      if (pos.y > -1)
        XtVaSetValues(dialogShell, XmNy, pos.y,
                    NULL);

      if (size.x > -1)
        XtVaSetValues(dialogShell, XmNwidth, size.x, NULL);
      if (size.y > -1)
        XtVaSetValues(dialogShell, XmNheight, size.y, NULL);
    }

    // This patch come from Torsten Liermann lier@lier1.muc.de
    if (XmIsMotifWMRunning(shell))
    {
        int decor = 0 ;
        if (m_windowStyle & wxRESIZE_BORDER)
          decor |= MWM_DECOR_RESIZEH ;
        if (m_windowStyle & wxSYSTEM_MENU)
          decor |= MWM_DECOR_MENU;
        if ((m_windowStyle & wxCAPTION) ||
            (m_windowStyle & wxTINY_CAPTION_HORIZ) ||
            (m_windowStyle & wxTINY_CAPTION_VERT))
          decor |= MWM_DECOR_TITLE;
        if (m_windowStyle & wxTHICK_FRAME)
          decor |= MWM_DECOR_BORDER;
        if (m_windowStyle & wxMINIMIZE_BOX)
          decor |= MWM_DECOR_MINIMIZE;
        if (m_windowStyle & wxMAXIMIZE_BOX)
          decor |= MWM_DECOR_MAXIMIZE;

        XtVaSetValues(shell,XmNmwmDecorations,decor,NULL) ;
    }
    // This allows non-Motif window managers to support at least the
    // no-decorations case.
    else
    {
      if ((m_windowStyle & wxCAPTION) != wxCAPTION)
          XtVaSetValues((Widget) shell,XmNoverrideRedirect,TRUE,NULL);
    }

    XtRealizeWidget(dialogShell);

    XtAddCallback(dialogShell,XmNunmapCallback,
                 (XtCallbackProc)wxUnmapBulletinBoard,this) ;

    // Positioning of the dialog doesn't work properly unless the dialog
    // is managed, so we manage without mapping to the screen.
    // To show, we map the shell (actually it's parent).
    if (!wxUSE_INVISIBLE_RESIZE)
        XtVaSetValues(shell, XmNmappedWhenManaged, FALSE, NULL);

    if (!wxUSE_INVISIBLE_RESIZE)
    {
        XtManageChild(dialogShell);
        SetSize(pos.x, pos.y, size.x, size.y);
    }
    XtAddEventHandler(dialogShell,ExposureMask,FALSE,
                          wxDialogBoxRepaintProc, (XtPointer) this);

    XtAddEventHandler(dialogShell,
       ButtonPressMask | ButtonReleaseMask | PointerMotionMask | KeyPressMask,
       FALSE,
       wxDialogBoxEventHandler,
       (XtPointer)this);

    ChangeBackgroundColour();

    return TRUE;
}

void wxDialog::SetModal(bool flag)
{
    if ( flag )
        m_windowStyle |= wxDIALOG_MODAL ;
    else
        if ( m_windowStyle & wxDIALOG_MODAL )
          m_windowStyle -= wxDIALOG_MODAL ;
  
  wxModelessWindows.DeleteObject(this);
  if (!flag)
    wxModelessWindows.Append(this);
}

wxDialog::~wxDialog()
{
    m_modalShowing = FALSE;
    if (!wxUSE_INVISIBLE_RESIZE && m_mainWidget)
    {
      XtUnmapWidget((Widget) m_mainWidget);
    }

    wxTopLevelWindows.DeleteObject(this);

    if ( (GetWindowStyleFlag() & wxDIALOG_MODAL) != wxDIALOG_MODAL )
      wxModelessWindows.DeleteObject(this);

    // If this is the last top-level window, exit.
    if (wxTheApp && (wxTopLevelWindows.Number() == 0))
    {
      wxTheApp->SetTopWindow(NULL);

      if (wxTheApp->GetExitOnFrameDelete())
      {
         wxTheApp->ExitMainLoop();
      }
    }

    // This event-flushing code used to be in wxWindow::PostDestroyChildren (wx_dialog.cpp)
    // but I think this should work, if we destroy the children first.
    // Note that this might need to be done for wxFrame also.
    DestroyChildren();

    // Now process all events, because otherwise
    // this might remain on the screen.
    Display* display;
    if (m_mainWidget)
      display = XtDisplay((Widget) m_mainWidget);
    else
      display = (Display*) wxGetDisplay();

    XSync(display, FALSE);
    XEvent event;
    while (XtAppPending((XtAppContext) wxTheApp->GetAppContext())) {
      XFlush(display);
      XtAppNextEvent((XtAppContext) wxTheApp->GetAppContext(), &event);
      XtDispatchEvent(&event);
    }
}

// By default, pressing escape cancels the dialog
void wxDialog::OnCharHook(wxKeyEvent& event)
{
  if (event.m_keyCode == WXK_ESCAPE)
  {
		// Behaviour changed in 2.0: we'll send a Cancel message
		// to the dialog instead of Close.
		wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
		cancelEvent.SetEventObject( this );
		GetEventHandler()->ProcessEvent(cancelEvent);

		return;
  }
  // We didn't process this event.
  event.Skip();
}

void wxDialog::Iconize(bool WXUNUSED(iconize))
{
  // Can't iconize a dialog in Motif, apparently
  // TODO: try using the parent of m_mainShell.
//  XtVaSetValues((Widget) m_mainWidget, XmNiconic, iconize, NULL);
}

bool wxDialog::IsIconized() const
{
  /*
    Boolean iconic;
    XtVaGetValues((Widget) m_mainWidget, XmNiconic, &iconic, NULL);

    return iconic;
   */
    return FALSE;
}

void wxDialog::SetSize(int x, int y, int width, int height, int sizeFlags)
{
    XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_ANY, NULL);
    wxWindow::SetSize(x, y, width, height, sizeFlags);
    XtVaSetValues((Widget) m_mainWidget, XmNresizePolicy, XmRESIZE_NONE, NULL);
}

void wxDialog::SetClientSize(int width, int height)
{
    SetSize(-1, -1, width, height);
}


void wxDialog::SetTitle(const wxString& title)
{
    m_dialogTitle = title;
    if (!title.IsNull())
    {
        XmString str = XmStringCreateSimple((char*) (const char*) title);
        XtVaSetValues((Widget) m_mainWidget, 
                  XmNtitle, (char*) (const char*) title,
                  XmNdialogTitle, str, // Roberto Cocchi
                  XmNiconName, (char*) (const char*) title,
                  NULL);
        XmStringFree(str);
    }
}

wxString wxDialog::GetTitle() const
{
  return m_dialogTitle;
}

void wxDialog::Centre(int direction)
{
  int x_offset,y_offset ;
  int display_width, display_height;
  int  width, height, x, y;
  wxWindow *parent = GetParent();
  if ((direction & wxCENTER_FRAME) && parent)
  {
      parent->GetPosition(&x_offset,&y_offset) ;
      parent->GetSize(&display_width,&display_height) ;
  }
  else
  {
    wxDisplaySize(&display_width, &display_height);
    x_offset = 0 ;
    y_offset = 0 ;
  }

  GetSize(&width, &height);
  GetPosition(&x, &y);

  if (direction & wxHORIZONTAL)
    x = (int)((display_width - width)/2);
  if (direction & wxVERTICAL)
    y = (int)((display_height - height)/2);

  SetSize(x+x_offset, y+y_offset, width, height);
}

void wxDialog::Raise()
{
    Window parent_window = XtWindow((Widget) m_mainWidget),
	   next_parent   = XtWindow((Widget) m_mainWidget),
	   root          = RootWindowOfScreen(XtScreen((Widget) m_mainWidget));
    // search for the parent that is child of ROOT, because the WM may
    // reparent twice and notify only the next parent (like FVWM)
    while (next_parent != root) {
	Window *theChildren; unsigned int n;
	parent_window = next_parent;
	XQueryTree(XtDisplay((Widget) m_mainWidget), parent_window, &root,
		   &next_parent, &theChildren, &n);
	XFree(theChildren); // not needed
    }
    XRaiseWindow(XtDisplay((Widget) m_mainWidget), parent_window);
}

void wxDialog::Lower()
{
    Window parent_window = XtWindow((Widget) m_mainWidget),
	   next_parent   = XtWindow((Widget) m_mainWidget),
	   root          = RootWindowOfScreen(XtScreen((Widget) m_mainWidget));
    // search for the parent that is child of ROOT, because the WM may
    // reparent twice and notify only the next parent (like FVWM)
    while (next_parent != root) {
	Window *theChildren; unsigned int n;
	parent_window = next_parent;
	XQueryTree(XtDisplay((Widget) m_mainWidget), parent_window, &root,
		   &next_parent, &theChildren, &n);
	XFree(theChildren); // not needed
    }
    XLowerWindow(XtDisplay((Widget) m_mainWidget), parent_window);
}

bool wxDialog::Show(bool show)
{
    m_isShown = show;

    if (show)
    {
        if (!wxUSE_INVISIBLE_RESIZE)
          XtMapWidget(XtParent((Widget) m_mainWidget));
        else
          XtManageChild((Widget) m_mainWidget) ; 

        XRaiseWindow(XtDisplay((Widget) m_mainWidget), XtWindow((Widget) m_mainWidget));

    }
    else
    {
        if (!wxUSE_INVISIBLE_RESIZE)
            XtUnmapWidget(XtParent((Widget) m_mainWidget));
        else
            XtUnmanageChild((Widget) m_mainWidget) ;

	XFlush(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()));
	XSync(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()), FALSE);
    }

    return TRUE;
}

// Shows a dialog modally, returning a return code
int wxDialog::ShowModal()
{
    m_windowStyle |= wxDIALOG_MODAL;

    Show(TRUE);

    if (m_modalShowing)
        return 0;

    wxModalShowingStack.Insert((wxObject *)TRUE);
        
    m_modalShowing = TRUE;
    XtAddGrab((Widget) m_mainWidget, TRUE, FALSE);

    XEvent event;

    // Loop until we signal that the dialog should be closed
    while ((wxModalShowingStack.Number() > 0) && ((int)(wxModalShowingStack.First()->Data()) != 0))
    {
//        XtAppProcessEvent((XtAppContext) wxTheApp->GetAppContext(), XtIMAll);

        XtAppNextEvent((XtAppContext) wxTheApp->GetAppContext(), &event);
        wxTheApp->ProcessXEvent((WXEvent*) &event);
    }

    // Remove modal dialog flag from stack
    wxNode *node = wxModalShowingStack.First();
    if (node)
      delete node;

    // Now process all events in case they get sent to a destroyed dialog
    XSync(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()), FALSE);
    while (XtAppPending((XtAppContext) wxTheApp->GetAppContext()))
    {
        XFlush(XtDisplay((Widget) wxTheApp->GetTopLevelWidget()));
        XtAppNextEvent((XtAppContext) wxTheApp->GetAppContext(), &event);

        wxTheApp->ProcessXEvent((WXEvent*) &event);
    }

    // TODO: is it safe to call this, if the dialog may have been deleted
    // by now? Probably only if we're using delayed deletion of dialogs.
    return GetReturnCode();
}

void wxDialog::EndModal(int retCode)
{
    if (!m_modalShowing)
        return;

    SetReturnCode(retCode);

    XtRemoveGrab((Widget) m_mainWidget);

    Show(FALSE);

    m_modalShowing = FALSE;

    wxNode *node = wxModalShowingStack.First();
    if (node)
      node->SetData((wxObject *)FALSE);
}

// Standard buttons
void wxDialog::OnOK(wxCommandEvent& WXUNUSED(event))
{
	if ( Validate() && TransferDataFromWindow() )
	{
        if ( IsModal() )
            EndModal(wxID_OK);
        else
        {
		    SetReturnCode(wxID_OK);
		    this->Show(FALSE);
        }
	}
}

void wxDialog::OnApply(wxCommandEvent& WXUNUSED(event))
{
	if (Validate())
		TransferDataFromWindow();
	// TODO probably need to disable the Apply button until things change again
}

void wxDialog::OnCancel(wxCommandEvent& WXUNUSED(event))
{
    if ( IsModal() )
        EndModal(wxID_CANCEL);
    else
    {
        SetReturnCode(wxID_CANCEL);
		this->Show(FALSE);
    }
}

bool wxDialog::OnClose()
{
	// Behaviour changed in 2.0: we'll send a Cancel message by default,
    // which may close the dialog.
    // Check for looping if the Cancel event handler calls Close()

    static wxList closing;

    if ( closing.Member(this) )
        return FALSE;

    closing.Append(this);

	wxCommandEvent cancelEvent(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
	cancelEvent.SetEventObject( this );
	GetEventHandler()->ProcessEvent(cancelEvent);

    closing.DeleteObject(this);

	return FALSE;
}

void wxDialog::OnCloseWindow(wxCloseEvent& event)
{
    // Compatibility
    if ( GetEventHandler()->OnClose() || event.GetForce())
    {
        this->Destroy();
    }
}

// Destroy the window (delayed, if a managed window)
bool wxDialog::Destroy()
{
  if (!wxPendingDelete.Member(this))
    wxPendingDelete.Append(this);
  return TRUE;
}

void wxDialog::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
{
  SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
  Refresh();
}

void wxDialog::Fit()
{
}

// Handle a close event from the window manager
static void wxCloseDialogCallback( Widget WXUNUSED(widget), XtPointer client_data, 
                                   XmAnyCallbackStruct *WXUNUSED(cbs))
{
  wxDialog *dialog = (wxDialog *)client_data;
  wxCloseEvent closeEvent(wxEVT_CLOSE_WINDOW, dialog->GetId());
  closeEvent.SetEventObject(dialog);

  // May delete the dialog (with delayed deletion)
  dialog->GetEventHandler()->ProcessEvent(closeEvent);
}

// TODO: Preferably, we should have a universal repaint proc.
// Meanwhile, use a special one for dialogs.
static void wxDialogBoxRepaintProc(Widget w, XtPointer WXUNUSED(c_data), XEvent *event, char *)
{
     Window window;
     Display *display;

     wxWindow* win = (wxWindow *)wxWidgetHashTable->Get((long)w);
     if (!win)
       return;

     switch(event -> type)
     {
          case Expose :
          {
               window = (Window) win -> GetXWindow();
               display = (Display *) win -> GetXDisplay();

               wxRect* rect = new wxRect(event->xexpose.x, event->xexpose.y,
                                       event->xexpose.width, event->xexpose.height);
               win->m_updateRects.Append((wxObject*) rect);

               if (event -> xexpose.count == 0)
               {
                    wxPaintEvent event(win->GetId());
                    event.SetEventObject(win);
                    win->GetEventHandler()->ProcessEvent(event);

                    win->ClearUpdateRects();
               }
               break;
	  }
        default :
	  {
               cout << "\n\nNew Event ! is = " << event -> type << "\n";
               break;
	  }
     }
}

static void wxDialogBoxEventHandler (Widget    wid,
                              XtPointer WXUNUSED(client_data),
                              XEvent*   event,
                              Boolean *continueToDispatch)
{
  wxDialog *dialog = (wxDialog *)wxWidgetHashTable->Get((long)wid);
  if (dialog)
  {
    wxMouseEvent wxevent(wxEVT_NULL);
    if (wxTranslateMouseEvent(wxevent, dialog, wid, event))
    {
        wxevent.SetEventObject(dialog);
        wxevent.SetId(dialog->GetId());
        dialog->GetEventHandler()->ProcessEvent(wxevent);
    }
    else
    {
      // An attempt to implement OnCharHook by calling OnCharHook first;
      // if this returns TRUE, set continueToDispatch to False
      // (don't continue processing).
      // Otherwise set it to True and call OnChar.
      wxKeyEvent keyEvent(wxEVENT_TYPE_CHAR);
      if (wxTranslateKeyEvent(keyEvent, dialog, wid, event))
      {
        keyEvent.SetEventObject(dialog);
        keyEvent.SetId(dialog->GetId());
        keyEvent.SetEventType(wxEVT_CHAR_HOOK);
        if (dialog->GetEventHandler()->ProcessEvent(keyEvent))
        {
            *continueToDispatch = False;
            return;
        }
        else
        {
            keyEvent.SetEventType(wxEVT_CHAR);
            dialog->GetEventHandler()->ProcessEvent(keyEvent);
	}
      }
    }
  }
  *continueToDispatch = True;
}

static void wxUnmapBulletinBoard(Widget WXUNUSED(dialog), wxDialog *WXUNUSED(client), XtPointer WXUNUSED(call) )
{
  /* This gets called when the dialog is being shown, which
   * defeats modal showing.
  client->m_modalShowing = FALSE ;
  client->m_isShown = FALSE;
  */
}

void wxDialog::ChangeFont(bool keepOriginalSize)
{
    wxWindow::ChangeFont(keepOriginalSize);
}

void wxDialog::ChangeBackgroundColour()
{
    if (GetMainWidget())
        DoChangeBackgroundColour(GetMainWidget(), m_backgroundColour);
}

void wxDialog::ChangeForegroundColour()
{
    if (GetMainWidget())
        DoChangeForegroundColour(GetMainWidget(), m_foregroundColour);
}