src/gtk/popupwin.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        popupwin.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  11 #pragma implementation "popupwin.h"
  12 #endif
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #if wxUSE_POPUPWIN
  18
  19 #include "wx/popupwin.h"
  20 #include "wx/frame.h"
  21 #include "wx/app.h"
  22 #include "wx/cursor.h"
  23
  24 #include <gdk/gdk.h>
  25 #include <gtk/gtk.h>
  26 #include <gdk/gdkkeysyms.h>
  27
  28 #include "wx/gtk/win_gtk.h"
  29
  30 //-----------------------------------------------------------------------------
  31 // idle system
  32 //-----------------------------------------------------------------------------
  33
  34 extern void wxapp_install_idle_handler();
  35 extern bool g_isIdle;
  36
  37 //-----------------------------------------------------------------------------
  38 // "button_press"
  39 //-----------------------------------------------------------------------------
  40
  41 extern "C" {
  42 static gint gtk_popup_button_press (GtkWidget *widget, GdkEvent *gdk_event, wxPopupWindow* win )
  43 {
  44     GtkWidget *child = gtk_get_event_widget (gdk_event);
  45
  46   /* We don't ask for button press events on the grab widget, so
  47    *  if an event is reported directly to the grab widget, it must
  48    *  be on a window outside the application (and thus we remove
  49    *  the popup window). Otherwise, we check if the widget is a child
  50    *  of the grab widget, and only remove the popup window if it
  51    *  is not.
  52    */
  53     if (child != widget)
  54     {
  55         while (child)
  56             {
  57                 if (child == widget)
  58                     return FALSE;
  59             child = child->parent;
  60         }
  61     }
  62
  63     wxFocusEvent event( wxEVT_KILL_FOCUS, win->GetId() );
  64     event.SetEventObject( win );
  65
  66     (void)win->GetEventHandler()->ProcessEvent( event );
  67
  68     return TRUE;
  69 }
  70 }
  71
  72 //-----------------------------------------------------------------------------
  73 // "focus" from m_window
  74 //-----------------------------------------------------------------------------
  75
  76 extern "C" {
  77 static gint gtk_dialog_focus_callback( GtkWidget *widget, GtkDirectionType WXUNUSED(d), wxWindow *WXUNUSED(win) )
  78 {
  79     if (g_isIdle)
  80         wxapp_install_idle_handler();
  81
  82     // This disables GTK's tab traversal
  83     gtk_signal_emit_stop_by_name( GTK_OBJECT(widget), "focus" );
  84     return TRUE;
  85 }
  86 }
  87
  88 //-----------------------------------------------------------------------------
  89 // "delete_event"
  90 //-----------------------------------------------------------------------------
  91
  92 extern "C" {
  93 bool gtk_dialog_delete_callback( GtkWidget *WXUNUSED(widget), GdkEvent *WXUNUSED(event), wxPopupWindow *win )
  94 {
  95     if (g_isIdle)
  96         wxapp_install_idle_handler();
  97
  98     if (win->IsEnabled())
  99         win->Close();
 100
 101     return TRUE;
 102 }
 103 }
 104
 105 //-----------------------------------------------------------------------------
 106 // "size_allocate"
 107 //-----------------------------------------------------------------------------
 108
 109 extern "C" {
 110 static void gtk_dialog_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxPopupWindow *win )
 111 {
 112     if (g_isIdle)
 113         wxapp_install_idle_handler();
 114
 115     if (!win->m_hasVMT) return;
 116
 117     if ((win->m_width != alloc->width) || (win->m_height != alloc->height))
 118     {
 119         win->m_width = alloc->width;
 120         win->m_height = alloc->height;
 121         win->GtkUpdateSize();
 122     }
 123 }
 124 }
 125
 126 //-----------------------------------------------------------------------------
 127 // "realize" from m_widget
 128 //-----------------------------------------------------------------------------
 129
 130 /* we cannot MWM hints and icons before the widget has been realized,
 131    so we do this directly after realization */
 132
 133 extern "C" {
 134 static gint
 135 gtk_dialog_realized_callback( GtkWidget * WXUNUSED(widget), wxPopupWindow *win )
 136 {
 137     if (g_isIdle)
 138         wxapp_install_idle_handler();
 139
 140     /* all this is for Motif Window Manager "hints" and is supposed to be
 141        recognized by other WM as well. not tested. */
 142     long decor = (long) GDK_DECOR_BORDER;
 143     long func = (long) GDK_FUNC_MOVE ;
 144
 145     gdk_window_set_decorations( win->m_widget->window, (GdkWMDecoration)decor);
 146     gdk_window_set_functions( win->m_widget->window, (GdkWMFunction)func);
 147
 148     gtk_window_set_policy(GTK_WINDOW(win->m_widget), 0, 0, 1);
 149
 150     return FALSE;
 151 }
 152 }
 153
 154 //-----------------------------------------------------------------------------
 155 // InsertChild for wxPopupWindow
 156 //-----------------------------------------------------------------------------
 157
 158 /* Callback for wxFrame. This very strange beast has to be used because
 159  * C++ has no virtual methods in a constructor. We have to emulate a
 160  * virtual function here as wxWidgets requires different ways to insert
 161  * a child in container classes. */
 162
 163 static void wxInsertChildInDialog( wxPopupWindow* parent, wxWindow* child )
 164 {
 165     gtk_pizza_put( GTK_PIZZA(parent->m_wxwindow),
 166                      GTK_WIDGET(child->m_widget),
 167                      child->m_x,
 168                      child->m_y,
 169                      child->m_width,
 170                      child->m_height );
 171
 172     if (parent->HasFlag(wxTAB_TRAVERSAL))
 173     {
 174         /* we now allow a window to get the focus as long as it
 175            doesn't have any children. */
 176         GTK_WIDGET_UNSET_FLAGS( parent->m_wxwindow, GTK_CAN_FOCUS );
 177     }
 178 }
 179
 180 //-----------------------------------------------------------------------------
 181 // wxPopupWindow
 182 //-----------------------------------------------------------------------------
 183
 184 BEGIN_EVENT_TABLE(wxPopupWindow,wxPopupWindowBase)
 185 #ifdef __WXUNIVERSAL__
 186     EVT_SIZE(wxPopupWindow::OnSize)
 187 #endif
 188 END_EVENT_TABLE()
 189
 190 wxPopupWindow::~wxPopupWindow()
 191 {
 192 }
 193
 194 bool wxPopupWindow::Create( wxWindow *parent, int style )
 195 {
 196     m_needParent = FALSE;
 197
 198     if (!PreCreation( parent, wxDefaultPosition, wxDefaultSize ) ||
 199         !CreateBase( parent, -1, wxDefaultPosition, wxDefaultSize, style, wxDefaultValidator, wxT("popup") ))
 200     {
 201         wxFAIL_MSG( wxT("wxPopupWindow creation failed") );
 202         return FALSE;
 203     }
 204
 205     // All dialogs should really have this style
 206     m_windowStyle |= wxTAB_TRAVERSAL;
 207
 208     m_insertCallback = (wxInsertChildFunction) wxInsertChildInDialog;
 209
 210     m_widget = gtk_window_new( GTK_WINDOW_POPUP );
 211
 212     if ((m_parent) && (GTK_IS_WINDOW(m_parent->m_widget)))
 213         gtk_window_set_transient_for( GTK_WINDOW(m_widget), GTK_WINDOW(m_parent->m_widget) );
 214
 215     GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 216
 217     gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
 218         GTK_SIGNAL_FUNC(gtk_dialog_delete_callback), (gpointer)this );
 219
 220     m_wxwindow = gtk_pizza_new();
 221     gtk_widget_show( m_wxwindow );
 222     GTK_WIDGET_UNSET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
 223
 224     gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
 225
 226     if (m_parent) m_parent->AddChild( this );
 227
 228     PostCreation();
 229
 230     /*  we cannot set MWM hints  before the widget has
 231         been realized, so we do this directly after realization */
 232     gtk_signal_connect( GTK_OBJECT(m_widget), "realize",
 233                         GTK_SIGNAL_FUNC(gtk_dialog_realized_callback), (gpointer) this );
 234
 235     // the user resized the frame by dragging etc.
 236     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 237         GTK_SIGNAL_FUNC(gtk_dialog_size_callback), (gpointer)this );
 238
 239     // disable native tab traversal
 240     gtk_signal_connect( GTK_OBJECT(m_widget), "focus",
 241         GTK_SIGNAL_FUNC(gtk_dialog_focus_callback), (gpointer)this );
 242
 243     gtk_signal_connect (GTK_OBJECT(m_widget), "button_press_event",
 244         GTK_SIGNAL_FUNC(gtk_popup_button_press), (gpointer)this );
 245
 246     return TRUE;
 247 }
 248
 249 void wxPopupWindow::DoMoveWindow(int WXUNUSED(x), int WXUNUSED(y), int WXUNUSED(width), int WXUNUSED(height) )
 250 {
 251     wxFAIL_MSG( wxT("DoMoveWindow called for wxPopupWindow") );
 252 }
 253
 254 void wxPopupWindow::DoSetSize( int x, int y, int width, int height, int sizeFlags )
 255 {
 256     wxASSERT_MSG( (m_widget != NULL), wxT("invalid dialog") );
 257     wxASSERT_MSG( (m_wxwindow != NULL), wxT("invalid dialog") );
 258
 259     if (m_resizing) return; /* I don't like recursions */
 260     m_resizing = TRUE;
 261
 262     int old_x = m_x;
 263     int old_y = m_y;
 264
 265     int old_width = m_width;
 266     int old_height = m_height;
 267
 268     if ((sizeFlags & wxSIZE_ALLOW_MINUS_ONE) == 0)
 269     {
 270         if (x != -1) m_x = x;
 271         if (y != -1) m_y = y;
 272         if (width != -1) m_width = width;
 273         if (height != -1) m_height = height;
 274     }
 275     else
 276     {
 277         m_x = x;
 278         m_y = y;
 279         m_width = width;
 280         m_height = height;
 281     }
 282
 283 /*
 284     if ((sizeFlags & wxSIZE_AUTO_WIDTH) == wxSIZE_AUTO_WIDTH)
 285     {
 286         if (width == -1) m_width = 80;
 287     }
 288
 289     if ((sizeFlags & wxSIZE_AUTO_HEIGHT) == wxSIZE_AUTO_HEIGHT)
 290     {
 291        if (height == -1) m_height = 26;
 292     }
 293 */
 294
 295     int minWidth = GetMinWidth(),
 296         minHeight = GetMinHeight(),
 297         maxWidth = GetMaxWidth(),
 298         maxHeight = GetMaxHeight();
 299
 300     if ((minWidth != -1) && (m_width < minWidth)) m_width = minWidth;
 301     if ((minHeight != -1) && (m_height < minHeight)) m_height = minHeight;
 302     if ((maxWidth != -1) && (m_width > maxWidth)) m_width = maxWidth;
 303     if ((maxHeight != -1) && (m_height > maxHeight)) m_height = maxHeight;
 304
 305     if ((m_x != -1) || (m_y != -1))
 306     {
 307         if ((m_x != old_x) || (m_y != old_y))
 308         {
 309             /* we set the position here and when showing the dialog
 310                for the first time in idle time */
 311             gtk_widget_set_uposition( m_widget, m_x, m_y );
 312         }
 313     }
 314
 315     if ((m_width != old_width) || (m_height != old_height))
 316     {
 317         gtk_widget_set_usize( m_widget, m_width, m_height );
 318
 319         /* actual resizing is deferred to GtkOnSize in idle time and
 320            when showing the dialog */
 321         m_sizeSet = FALSE;
 322
 323     }
 324
 325     m_resizing = FALSE;
 326 }
 327
 328 void wxPopupWindow::GtkOnSize( int WXUNUSED(x), int WXUNUSED(y), int width, int height )
 329 {
 330     // due to a bug in gtk, x,y are always 0
 331     // m_x = x;
 332     // m_y = y;
 333
 334     if ((m_height == height) && (m_width == width) && (m_sizeSet)) return;
 335     if (!m_wxwindow) return;
 336
 337     m_width = width;
 338     m_height = height;
 339
 340     /* FIXME: is this a hack? */
 341     /* since for some reason GTK will revert to using maximum size ever set
 342        for this window, we have to set geometry hints maxsize to match
 343        size given. */
 344     int minWidth = GetMinWidth(),
 345         minHeight = GetMinHeight();
 346
 347     if ((minWidth != -1) && (m_width < minWidth)) m_width = minWidth;
 348     if ((minHeight != -1) && (m_height < minHeight)) m_height = minHeight;
 349
 350     /* set size hints */
 351     gint flag = GDK_HINT_MAX_SIZE; // GDK_HINT_POS;
 352     if ((minWidth != -1) || (minHeight != -1)) flag |= GDK_HINT_MIN_SIZE;
 353     GdkGeometry geom;
 354     geom.min_width = minWidth;
 355     geom.min_height = minHeight;
 356     geom.max_width = m_width;
 357     geom.max_height = m_height;
 358     gtk_window_set_geometry_hints( GTK_WINDOW(m_widget),
 359                                    (GtkWidget*) NULL,
 360                                    &geom,
 361                                    (GdkWindowHints) flag );
 362
 363
 364     m_sizeSet = TRUE;
 365
 366     wxSizeEvent event( wxSize(m_width,m_height), GetId() );
 367     event.SetEventObject( this );
 368     GetEventHandler()->ProcessEvent( event );
 369 }
 370
 371 void wxPopupWindow::OnInternalIdle()
 372 {
 373     if (!m_sizeSet && GTK_WIDGET_REALIZED(m_wxwindow))
 374         GtkOnSize( m_x, m_y, m_width, m_height );
 375
 376     wxWindow::OnInternalIdle();
 377 }
 378
 379 bool wxPopupWindow::Show( bool show )
 380 {
 381     if (show && !m_sizeSet)
 382     {
 383         /* by calling GtkOnSize here, we don't have to call
 384            either after showing the frame, which would entail
 385            much ugly flicker nor from within the size_allocate
 386            handler, because GTK 1.1.X forbids that. */
 387
 388         GtkOnSize( m_x, m_y, m_width, m_height );
 389     }
 390
 391     bool ret = wxWindow::Show( show );
 392
 393     return ret;
 394 }
 395
 396 #endif // wxUSE_POPUPWIN