src/gtk/dialog.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/dialog.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/dialog.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/cursor.h"
  17 #endif // WX_PRECOMP
  18
  19 #include "wx/evtloop.h"
  20
  21 #include "wx/ptr_scpd.h"
  22
  23 #include <gtk/gtk.h>
  24
  25 // this is defined in src/gtk/toplevel.cpp
  26 extern int wxOpenModalDialogsCount;
  27
  28 wxDEFINE_TIED_SCOPED_PTR_TYPE(wxGUIEventLoop);
  29
  30
  31 //-----------------------------------------------------------------------------
  32 // wxDialog
  33 //-----------------------------------------------------------------------------
  34
  35 IMPLEMENT_DYNAMIC_CLASS(wxDialog,wxTopLevelWindow)
  36
  37 void wxDialog::Init()
  38 {
  39     m_modalLoop = NULL;
  40     m_returnCode = 0;
  41     m_modalShowing = false;
  42     m_themeEnabled = true;
  43 }
  44
  45 wxDialog::wxDialog( wxWindow *parent,
  46                     wxWindowID id, const wxString &title,
  47                     const wxPoint &pos, const wxSize &size,
  48                     long style, const wxString &name )
  49 {
  50     Init();
  51
  52     (void)Create( parent, id, title, pos, size, style, name );
  53 }
  54
  55 bool wxDialog::Create( wxWindow *parent,
  56                        wxWindowID id, const wxString &title,
  57                        const wxPoint &pos, const wxSize &size,
  58                        long style, const wxString &name )
  59 {
  60     SetExtraStyle(GetExtraStyle() | wxTOPLEVEL_EX_DIALOG);
  61
  62     // all dialogs should have tab traversal enabled
  63     style |= wxTAB_TRAVERSAL;
  64
  65     return wxTopLevelWindow::Create(parent, id, title, pos, size, style, name);
  66 }
  67
  68 bool wxDialog::Show( bool show )
  69 {
  70     if (!show && IsModal())
  71     {
  72         EndModal( wxID_CANCEL );
  73     }
  74
  75     if (show && CanDoLayoutAdaptation())
  76         DoLayoutAdaptation();
  77
  78     bool ret = wxDialogBase::Show(show);
  79
  80     if (show)
  81         InitDialog();
  82
  83     return ret;
  84 }
  85
  86 wxDialog::~wxDialog()
  87 {
  88     m_isBeingDeleted = true;
  89
  90     // if the dialog is modal, this will end its event loop
  91     if ( IsModal() )
  92         EndModal(wxID_CANCEL);
  93 }
  94
  95 bool wxDialog::IsModal() const
  96 {
  97     return m_modalShowing;
  98 }
  99
 100 void wxDialog::SetModal( bool WXUNUSED(flag) )
 101 {
 102     wxFAIL_MSG( wxT("wxDialog:SetModal obsolete now") );
 103 }
 104
 105 int wxDialog::ShowModal()
 106 {
 107     wxASSERT_MSG( !IsModal(), "ShowModal() can't be called twice" );
 108
 109     // release the mouse if it's currently captured as the window having it
 110     // will be disabled when this dialog is shown -- but will still keep the
 111     // capture making it impossible to do anything in the modal dialog itself
 112     wxWindow * const win = wxWindow::GetCapture();
 113     if ( win )
 114         win->GTKReleaseMouseAndNotify();
 115
 116     // use the apps top level window as parent if none given unless explicitly
 117     // forbidden
 118     if ( !GetParent() && !(GetWindowStyleFlag() & wxDIALOG_NO_PARENT) )
 119     {
 120         wxWindow * const parent = GetParentForModalDialog();
 121         if ( parent && parent != this )
 122         {
 123             gtk_window_set_transient_for( GTK_WINDOW(m_widget),
 124                                           GTK_WINDOW(parent->m_widget) );
 125         }
 126     }
 127
 128     wxBusyCursorSuspender cs; // temporarily suppress the busy cursor
 129
 130     Show( true );
 131
 132     m_modalShowing = true;
 133
 134     wxOpenModalDialogsCount++;
 135
 136     // NOTE: gtk_window_set_modal internally calls gtk_grab_add() !
 137     gtk_window_set_modal(GTK_WINDOW(m_widget), TRUE);
 138
 139     // Run modal dialog event loop.
 140     {
 141         wxGUIEventLoopTiedPtr modal(&m_modalLoop, new wxGUIEventLoop());
 142         m_modalLoop->Run();
 143     }
 144
 145     gtk_window_set_modal(GTK_WINDOW(m_widget), FALSE);
 146
 147     wxOpenModalDialogsCount--;
 148
 149     return GetReturnCode();
 150 }
 151
 152 void wxDialog::EndModal( int retCode )
 153 {
 154     SetReturnCode( retCode );
 155
 156     if (!IsModal())
 157     {
 158         wxFAIL_MSG( "either wxDialog:EndModal called twice or ShowModal wasn't called" );
 159         return;
 160     }
 161
 162     m_modalShowing = false;
 163
 164     // Ensure Exit() is only called once. The dialog's event loop may be terminated
 165     // externally due to an uncaught exception.
 166     if (m_modalLoop && m_modalLoop->IsRunning())
 167         m_modalLoop->Exit();
 168
 169     Show( false );
 170 }