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