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