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/scopedptr.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     // if the dialog is modal, this will end its event loop
  89     if ( IsModal() )
  90         EndModal(wxID_CANCEL);
  91 }
  92
  93 bool wxDialog::IsModal() const
  94 {
  95     return m_modalShowing;
  96 }
  97
  98 void wxDialog::SetModal( bool WXUNUSED(flag) )
  99 {
 100     wxFAIL_MSG( wxT("wxDialog:SetModal obsolete now") );
 101 }
 102
 103 int wxDialog::ShowModal()
 104 {
 105     wxASSERT_MSG( !IsModal(), "ShowModal() can't be called twice" );
 106
 107     // release the mouse if it's currently captured as the window having it
 108     // will be disabled when this dialog is shown -- but will still keep the
 109     // capture making it impossible to do anything in the modal dialog itself
 110     wxWindow * const win = wxWindow::GetCapture();
 111     if ( win )
 112         win->GTKReleaseMouseAndNotify();
 113
 114     // use the apps top level window as parent if none given unless explicitly
 115     // forbidden
 116     if ( !GetParent() && !(GetWindowStyleFlag() & wxDIALOG_NO_PARENT) )
 117     {
 118         wxWindow * const parent = GetParentForModalDialog();
 119         if ( parent && parent != this )
 120         {
 121             gtk_window_set_transient_for( GTK_WINDOW(m_widget),
 122                                           GTK_WINDOW(parent->m_widget) );
 123         }
 124     }
 125
 126     wxBusyCursorSuspender cs; // temporarily suppress the busy cursor
 127
 128     Show( true );
 129
 130     m_modalShowing = true;
 131
 132     wxOpenModalDialogsCount++;
 133
 134     // NOTE: gtk_window_set_modal internally calls gtk_grab_add() !
 135     gtk_window_set_modal(GTK_WINDOW(m_widget), TRUE);
 136
 137     // Run modal dialog event loop.
 138     {
 139         wxGUIEventLoopTiedPtr modal(&m_modalLoop, new wxGUIEventLoop());
 140         m_modalLoop->Run();
 141     }
 142
 143     gtk_window_set_modal(GTK_WINDOW(m_widget), FALSE);
 144
 145     wxOpenModalDialogsCount--;
 146
 147     return GetReturnCode();
 148 }
 149
 150 void wxDialog::EndModal( int retCode )
 151 {
 152     SetReturnCode( retCode );
 153
 154     if (!IsModal())
 155     {
 156         wxFAIL_MSG( "either wxDialog:EndModal called twice or ShowModal wasn't called" );
 157         return;
 158     }
 159
 160     m_modalShowing = false;
 161
 162     // Ensure Exit() is only called once. The dialog's event loop may be terminated
 163     // externally due to an uncaught exception.
 164     if (m_modalLoop && m_modalLoop->IsRunning())
 165         m_modalLoop->Exit();
 166
 167     Show( false );
 168 }