src/gtk1/popupwin.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk1/popupwin.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 #if wxUSE_POPUPWIN
  14
  15 #include "wx/popupwin.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/app.h"
  19     #include "wx/frame.h"
  20     #include "wx/cursor.h"
  21 #endif // WX_PRECOMP
  22
  23 #include <gdk/gdk.h>
  24 #include <gtk/gtk.h>
  25 #include <gdk/gdkkeysyms.h>
  26
  27 #include "wx/gtk1/win_gtk.h"
  28
  29 //-----------------------------------------------------------------------------
  30 // idle system
  31 //-----------------------------------------------------------------------------
  32
  33 extern void wxapp_install_idle_handler();
  34 extern bool g_isIdle;
  35
  36 //-----------------------------------------------------------------------------
  37 // "button_press"
  38 //-----------------------------------------------------------------------------
  39
  40 extern "C" {
  41 static gint gtk_popup_button_press (GtkWidget *widget, GdkEvent *gdk_event, wxPopupWindow* win )
  42 {
  43     GtkWidget *child = gtk_get_event_widget (gdk_event);
  44
  45   /* We don't ask for button press events on the grab widget, so
  46    *  if an event is reported directly to the grab widget, it must
  47    *  be on a window outside the application (and thus we remove
  48    *  the popup window). Otherwise, we check if the widget is a child
  49    *  of the grab widget, and only remove the popup window if it
  50    *  is not.
  51    */
  52     if (child != widget)
  53     {
  54         while (child)
  55         {
  56             if (child == widget)
  57                 return FALSE;
  58             child = child->parent;
  59         }
  60     }
  61
  62     wxFocusEvent event( wxEVT_KILL_FOCUS, win->GetId() );
  63     event.SetEventObject( win );
  64
  65     (void)win->HandleWindowEvent( event );
  66
  67     return TRUE;
  68 }
  69 }
  70
  71 //-----------------------------------------------------------------------------
  72 // "focus" from m_window
  73 //-----------------------------------------------------------------------------
  74
  75 extern "C" {
  76 static gint gtk_dialog_focus_callback( GtkWidget *widget, GtkDirectionType WXUNUSED(d), wxWindow *WXUNUSED(win) )
  77 {
  78     if (g_isIdle)
  79         wxapp_install_idle_handler();
  80
  81     // This disables GTK's tab traversal
  82     gtk_signal_emit_stop_by_name( GTK_OBJECT(widget), "focus" );
  83     return TRUE;
  84 }
  85 }
  86
  87 //-----------------------------------------------------------------------------
  88 // "delete_event"
  89 //-----------------------------------------------------------------------------
  90
  91 extern "C" {
  92 bool gtk_dialog_delete_callback( GtkWidget *WXUNUSED(widget), GdkEvent *WXUNUSED(event), wxPopupWindow *win )
  93 {
  94     if (g_isIdle)
  95         wxapp_install_idle_handler();
  96
  97     if (win->IsEnabled())
  98         win->Close();
  99
 100     return TRUE;
 101 }
 102 }
 103
 104 //-----------------------------------------------------------------------------
 105 // "realize" from m_widget
 106 //-----------------------------------------------------------------------------
 107
 108 /* we cannot MWM hints and icons before the widget has been realized,
 109    so we do this directly after realization */
 110
 111 extern "C" {
 112 static gint
 113 gtk_dialog_realized_callback( GtkWidget * WXUNUSED(widget), wxPopupWindow *win )
 114 {
 115     if (g_isIdle)
 116         wxapp_install_idle_handler();
 117
 118     /* all this is for Motif Window Manager "hints" and is supposed to be
 119        recognized by other WM as well. not tested. */
 120     long decor = (long) GDK_DECOR_BORDER;
 121     long func = (long) GDK_FUNC_MOVE ;
 122
 123     gdk_window_set_decorations( win->m_widget->window, (GdkWMDecoration)decor);
 124     gdk_window_set_functions( win->m_widget->window, (GdkWMFunction)func);
 125
 126     gtk_window_set_policy(GTK_WINDOW(win->m_widget), 0, 0, 1);
 127
 128     return FALSE;
 129 }
 130 }
 131
 132 //-----------------------------------------------------------------------------
 133 // InsertChild for wxPopupWindow
 134 //-----------------------------------------------------------------------------
 135
 136 /* Callback for wxFrame. This very strange beast has to be used because
 137  * C++ has no virtual methods in a constructor. We have to emulate a
 138  * virtual function here as wxWidgets requires different ways to insert
 139  * a child in container classes. */
 140
 141 static void wxInsertChildInDialog( wxPopupWindow* parent, wxWindow* child )
 142 {
 143     gtk_pizza_put( GTK_PIZZA(parent->m_wxwindow),
 144                    GTK_WIDGET(child->m_widget),
 145                    child->m_x,
 146                    child->m_y,
 147                    child->m_width,
 148                    child->m_height );
 149
 150     if (parent->HasFlag(wxTAB_TRAVERSAL))
 151     {
 152         /* we now allow a window to get the focus as long as it
 153            doesn't have any children. */
 154         GTK_WIDGET_UNSET_FLAGS( parent->m_wxwindow, GTK_CAN_FOCUS );
 155     }
 156 }
 157
 158 //-----------------------------------------------------------------------------
 159 // wxPopupWindow
 160 //-----------------------------------------------------------------------------
 161
 162 BEGIN_EVENT_TABLE(wxPopupWindow,wxPopupWindowBase)
 163 #ifdef __WXUNIVERSAL__
 164     EVT_SIZE(wxPopupWindow::OnSize)
 165 #endif
 166 END_EVENT_TABLE()
 167
 168 wxPopupWindow::~wxPopupWindow()
 169 {
 170 }
 171
 172 bool wxPopupWindow::Create( wxWindow *parent, int style )
 173 {
 174     m_needParent = false;
 175
 176     if (!PreCreation( parent, wxDefaultPosition, wxDefaultSize ) ||
 177         !CreateBase( parent, -1, wxDefaultPosition, wxDefaultSize, style, wxDefaultValidator, wxT("popup") ))
 178     {
 179         wxFAIL_MSG( wxT("wxPopupWindow creation failed") );
 180         return false;
 181     }
 182
 183     // Unlike windows, top level windows are created hidden by default.
 184     m_isShown = false;
 185
 186     // All dialogs should really have this style
 187     m_windowStyle |= wxTAB_TRAVERSAL;
 188
 189     m_insertCallback = (wxInsertChildFunction) wxInsertChildInDialog;
 190
 191     m_widget = gtk_window_new( GTK_WINDOW_POPUP );
 192
 193     if ((m_parent) && (GTK_IS_WINDOW(m_parent->m_widget)))
 194         gtk_window_set_transient_for( GTK_WINDOW(m_widget), GTK_WINDOW(m_parent->m_widget) );
 195
 196     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 197
 198     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 199         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 200
 201     m_wxwindow = gtk_pizza_new();
 202     gtk_widget_show( m_wxwindow );
 203     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 204
 205     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 206
 207     if (m_parent) m_parent->AddChild( this );
 208
 209     PostCreation();
 210
 211     /*  we cannot set MWM hints  before the widget has
 212         been realized, so we do this directly after realization */
 213     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 214                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 215
 216     // disable native tab traversal
 217     gtk_signal_connect( GTK_OBJECT(m_widget), "focus",
 218         GTK_SIGNAL_FUNC(gtk_dialog_focus_callback), (gpointer)this );
 219
 220     gtk_signal_connect (GTK_OBJECT(m_widget), "button_press_event",
 221         GTK_SIGNAL_FUNC(gtk_popup_button_press), (gpointer)this );
 222
 223     return true;
 224 }
 225
 226 void wxPopupWindow::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXUNUSED(width), int WXUNUSED(height) )
 227 {
 228     wxFAIL_MSG( wxT("DoMoveWindow called for wxPopupWindow") );
 229 }
 230
 231 void wxPopupWindow::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 232 {
 233     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 234     wxASSERT_MSG( (m_wxwindow != NULL), wxT("invalid dialog") );
 235
 236     if (m_resizing) return; /* I don't like recursions */
 237     m_resizing = true;
 238
 239     int old_x = m_x;
 240     int old_y = m_y;
 241
 242     int old_width = m_width;
 243     int old_height = m_height;
 244
 245     if ((sizeFlags & wxSIZE_ALLOW_MINUS_ONE) == 0)
 246     {
 247         if (x != -1) m_x = x;
 248         if (y != -1) m_y = y;
 249         if (width != -1) m_width = width;
 250         if (height != -1) m_height = height;
 251     }
 252     else
 253     {
 254         m_x = x;
 255         m_y = y;
 256         m_width = width;
 257         m_height = height;
 258     }
 259
 260 /*
 261     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 262     {
 263         if (width == -1) m_width = 80;
 264     }
 265
 266     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 267     {
 268        if (height == -1) m_height = 26;
 269     }
 270 */
 271
 272     int minWidth = GetMinWidth(),
 273         minHeight = GetMinHeight(),
 274         maxWidth = GetMaxWidth(),
 275         maxHeight = GetMaxHeight();
 276
 277     if ((minWidth != -1) && (m_width < minWidth)) m_width = minWidth;
 278     if ((minHeight != -1) && (m_height < minHeight)) m_height = minHeight;
 279     if ((maxWidth != -1) && (m_width > maxWidth)) m_width = maxWidth;
 280     if ((maxHeight != -1) && (m_height > maxHeight)) m_height = maxHeight;
 281
 282     if ((m_x != -1) || (m_y != -1))
 283     {
 284         if ((m_x != old_x) || (m_y != old_y))
 285         {
 286             /* we set the position here and when showing the dialog
 287                for the first time in idle time */
 288             gtk_widget_set_uposition( m_widget, m_x, m_y );
 289         }
 290     }
 291
 292     if ((m_width != old_width) || (m_height != old_height))
 293     {
 294         gtk_widget_set_usize( m_widget, m_width, m_height );
 295
 296         /* actual resizing is deferred to GtkOnSize in idle time and
 297            when showing the dialog */
 298         m_sizeSet = false;
 299
 300     }
 301
 302     m_resizing = false;
 303 }
 304
 305 void wxPopupWindow::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 306 {
 307     // due to a bug in gtk, x,y are always 0
 308     // m_x = x;
 309     // m_y = y;
 310
 311     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 312     if (!m_wxwindow) return;
 313
 314     m_width = width;
 315     m_height = height;
 316
 317     /* FIXME: is this a hack? */
 318     /* Since for some reason GTK will revert to using maximum size ever set
 319        for this window, we have to set geometry hints maxsize to match size
 320        given. Also set the to that minsize since resizing isn't possible
 321        anyway. */
 322
 323     /* set size hints */
 324     gint flag = GDK_HINT_MAX_SIZE | GDK_HINT_MIN_SIZE; // GDK_HINT_POS;
 325     GdkGeometry geom;
 326     geom.min_width = m_width;
 327     geom.min_height = m_height;
 328     geom.max_width = m_width;
 329     geom.max_height = m_height;
 330     gtk_window_set_geometry_hints( GTK_WINDOW(m_widget),
 331                                    (GtkWidget*) NULL,
 332                                    &geom,
 333                                    (GdkWindowHints) flag );
 334
 335
 336     m_sizeSet = true;
 337
 338     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 339     event.SetEventObject( this );
 340     HandleWindowEvent( event );
 341 }
 342
 343 void wxPopupWindow::OnInternalIdle()
 344 {
 345     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 346         GtkOnSize( m_x, m_y, m_width, m_height );
 347
 348     wxWindow::OnInternalIdle();
 349 }
 350
 351 bool wxPopupWindow::Show( bool show )
 352 {
 353     if (show && !m_sizeSet)
 354     {
 355         /* by calling GtkOnSize here, we don't have to call
 356            either after showing the frame, which would entail
 357            much ugly flicker nor from within the size_allocate
 358            handler, because GTK 1.1.X forbids that. */
 359
 360         GtkOnSize( m_x, m_y, m_width, m_height );
 361     }
 362
 363     bool ret = wxWindow::Show( show );
 364
 365     return ret;
 366 }
 367
 368 #endif // wxUSE_POPUPWIN