src/gtk/anybutton.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/anybutton.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Created:     1998-05-20 (extracted from button.cpp)
   6 // Id:          $Id$
   7 // Copyright:   (c) 1998 Robert Roebling
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // For compilers that support precompilation, includes "wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #ifdef wxHAS_ANY_BUTTON
  15
  16 #ifndef WX_PRECOMP
  17     #include "wx/anybutton.h"
  18 #endif
  19
  20 #include "wx/stockitem.h"
  21
  22 #include <gtk/gtk.h>
  23 #include "wx/gtk/private/gtk2-compat.h"
  24
  25 // ----------------------------------------------------------------------------
  26 // GTK callbacks
  27 // ----------------------------------------------------------------------------
  28
  29 extern "C"
  30 {
  31
  32 static void
  33 wxgtk_button_enter_callback(GtkWidget *WXUNUSED(widget), wxAnyButton *button)
  34 {
  35     if ( button->GTKShouldIgnoreEvent() )
  36         return;
  37
  38     button->GTKMouseEnters();
  39 }
  40
  41 static void
  42 wxgtk_button_leave_callback(GtkWidget *WXUNUSED(widget), wxAnyButton *button)
  43 {
  44     if ( button->GTKShouldIgnoreEvent() )
  45         return;
  46
  47     button->GTKMouseLeaves();
  48 }
  49
  50 static void
  51 wxgtk_button_press_callback(GtkWidget *WXUNUSED(widget), wxAnyButton *button)
  52 {
  53     if ( button->GTKShouldIgnoreEvent() )
  54         return;
  55
  56     button->GTKPressed();
  57 }
  58
  59 static void
  60 wxgtk_button_released_callback(GtkWidget *WXUNUSED(widget), wxAnyButton *button)
  61 {
  62     if ( button->GTKShouldIgnoreEvent() )
  63         return;
  64
  65     button->GTKReleased();
  66 }
  67
  68 } // extern "C"
  69
  70 //-----------------------------------------------------------------------------
  71 // wxAnyButton
  72 //-----------------------------------------------------------------------------
  73
  74 bool wxAnyButton::Enable( bool enable )
  75 {
  76     if (!base_type::Enable(enable))
  77         return false;
  78
  79     gtk_widget_set_sensitive(gtk_bin_get_child(GTK_BIN(m_widget)), enable);
  80
  81     if (enable)
  82         GTKFixSensitivity();
  83
  84     GTKUpdateBitmap();
  85
  86     return true;
  87 }
  88
  89 GdkWindow *wxAnyButton::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
  90 {
  91     return gtk_button_get_event_window(GTK_BUTTON(m_widget));
  92 }
  93
  94 // static
  95 wxVisualAttributes
  96 wxAnyButton::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
  97 {
  98     return GetDefaultAttributesFromGTKWidget(gtk_button_new());
  99 }
 100
 101 // ----------------------------------------------------------------------------
 102 // bitmaps support
 103 // ----------------------------------------------------------------------------
 104
 105 void wxAnyButton::GTKMouseEnters()
 106 {
 107     m_isCurrent = true;
 108
 109     GTKUpdateBitmap();
 110 }
 111
 112 void wxAnyButton::GTKMouseLeaves()
 113 {
 114     m_isCurrent = false;
 115
 116     GTKUpdateBitmap();
 117 }
 118
 119 void wxAnyButton::GTKPressed()
 120 {
 121     m_isPressed = true;
 122
 123     GTKUpdateBitmap();
 124 }
 125
 126 void wxAnyButton::GTKReleased()
 127 {
 128     m_isPressed = false;
 129
 130     GTKUpdateBitmap();
 131 }
 132
 133 void wxAnyButton::GTKOnFocus(wxFocusEvent& event)
 134 {
 135     event.Skip();
 136
 137     GTKUpdateBitmap();
 138 }
 139
 140 wxAnyButton::State wxAnyButton::GTKGetCurrentState() const
 141 {
 142     if ( !IsThisEnabled() )
 143         return m_bitmaps[State_Disabled].IsOk() ? State_Disabled : State_Normal;
 144
 145     if ( m_isPressed && m_bitmaps[State_Pressed].IsOk() )
 146         return State_Pressed;
 147
 148     if ( m_isCurrent && m_bitmaps[State_Current].IsOk() )
 149         return State_Current;
 150
 151     if ( HasFocus() && m_bitmaps[State_Focused].IsOk() )
 152         return State_Focused;
 153
 154     return State_Normal;
 155 }
 156
 157 void wxAnyButton::GTKUpdateBitmap()
 158 {
 159     // if we don't show bitmaps at all, there is nothing to update
 160     if ( m_bitmaps[State_Normal].IsOk() )
 161     {
 162         // if we do show them, this will return a state for which we do have a
 163         // valid bitmap
 164         State state = GTKGetCurrentState();
 165
 166         GTKDoShowBitmap(m_bitmaps[state]);
 167     }
 168 }
 169
 170 void wxAnyButton::GTKDoShowBitmap(const wxBitmap& bitmap)
 171 {
 172     wxASSERT_MSG( bitmap.IsOk(), "invalid bitmap" );
 173
 174     GtkWidget *image;
 175     if ( DontShowLabel() )
 176     {
 177         image = gtk_bin_get_child(GTK_BIN(m_widget));
 178     }
 179     else // have both label and bitmap
 180     {
 181         image = gtk_button_get_image(GTK_BUTTON(m_widget));
 182     }
 183
 184     wxCHECK_RET( image && GTK_IS_IMAGE(image), "must have image widget" );
 185
 186     gtk_image_set_from_pixbuf(GTK_IMAGE(image), bitmap.GetPixbuf());
 187 }
 188
 189 wxBitmap wxAnyButton::DoGetBitmap(State which) const
 190 {
 191     return m_bitmaps[which];
 192 }
 193
 194 void wxAnyButton::DoSetBitmap(const wxBitmap& bitmap, State which)
 195 {
 196     switch ( which )
 197     {
 198         case State_Normal:
 199             if ( DontShowLabel() )
 200             {
 201                 // we only have the bitmap in this button, never remove it but
 202                 // do invalidate the best size when the bitmap (and presumably
 203                 // its size) changes
 204                 InvalidateBestSize();
 205             }
 206             // normal image is special: setting it enables images for the button and
 207             // resetting it to nothing disables all of them
 208             else
 209             {
 210                 GtkWidget *image = gtk_button_get_image(GTK_BUTTON(m_widget));
 211                 if ( image && !bitmap.IsOk() )
 212                 {
 213                     gtk_container_remove(GTK_CONTAINER(m_widget), image);
 214                 }
 215                 else if ( !image && bitmap.IsOk() )
 216                 {
 217                     image = gtk_image_new();
 218                     gtk_button_set_image(GTK_BUTTON(m_widget), image);
 219                 }
 220                 else // image presence or absence didn't change
 221                 {
 222                     // don't invalidate best size below
 223                     break;
 224                 }
 225
 226                 InvalidateBestSize();
 227             }
 228             break;
 229
 230         case State_Pressed:
 231             if ( bitmap.IsOk() )
 232             {
 233                 if ( !m_bitmaps[which].IsOk() )
 234                 {
 235                     // we need to install the callbacks to be notified about
 236                     // the button pressed state change
 237                     g_signal_connect
 238                     (
 239                         m_widget,
 240                         "pressed",
 241                         G_CALLBACK(wxgtk_button_press_callback),
 242                         this
 243                     );
 244
 245                     g_signal_connect
 246                     (
 247                         m_widget,
 248                         "released",
 249                         G_CALLBACK(wxgtk_button_released_callback),
 250                         this
 251                     );
 252                 }
 253             }
 254             else // no valid bitmap
 255             {
 256                 if ( m_bitmaps[which].IsOk() )
 257                 {
 258                     // we don't need to be notified about the button pressed
 259                     // state changes any more
 260                     g_signal_handlers_disconnect_by_func
 261                     (
 262                         m_widget,
 263                         (gpointer)wxgtk_button_press_callback,
 264                         this
 265                     );
 266
 267                     g_signal_handlers_disconnect_by_func
 268                     (
 269                         m_widget,
 270                         (gpointer)wxgtk_button_released_callback,
 271                         this
 272                     );
 273
 274                     // also make sure we don't remain stuck in pressed state
 275                     if ( m_isPressed )
 276                     {
 277                         m_isPressed = false;
 278                         GTKUpdateBitmap();
 279                     }
 280                 }
 281             }
 282             break;
 283
 284         case State_Current:
 285             // the logic here is the same as above for State_Pressed: we need
 286             // to connect the handlers if we must be notified about the changes
 287             // in the button current state and we disconnect them when/if we
 288             // don't need them any more
 289             if ( bitmap.IsOk() )
 290             {
 291                 if ( !m_bitmaps[which].IsOk() )
 292                 {
 293                     g_signal_connect
 294                     (
 295                         m_widget,
 296                         "enter",
 297                         G_CALLBACK(wxgtk_button_enter_callback),
 298                         this
 299                     );
 300
 301                     g_signal_connect
 302                     (
 303                         m_widget,
 304                         "leave",
 305                         G_CALLBACK(wxgtk_button_leave_callback),
 306                         this
 307                     );
 308                 }
 309             }
 310             else // no valid bitmap
 311             {
 312                 if ( m_bitmaps[which].IsOk() )
 313                 {
 314                     g_signal_handlers_disconnect_by_func
 315                     (
 316                         m_widget,
 317                         (gpointer)wxgtk_button_enter_callback,
 318                         this
 319                     );
 320
 321                     g_signal_handlers_disconnect_by_func
 322                     (
 323                         m_widget,
 324                         (gpointer)wxgtk_button_leave_callback,
 325                         this
 326                     );
 327
 328                     if ( m_isCurrent )
 329                     {
 330                         m_isCurrent = false;
 331                         GTKUpdateBitmap();
 332                     }
 333                 }
 334             }
 335             break;
 336
 337         case State_Focused:
 338             if ( bitmap.IsOk() )
 339             {
 340                 Connect(wxEVT_SET_FOCUS,
 341                         wxFocusEventHandler(wxAnyButton::GTKOnFocus));
 342                 Connect(wxEVT_KILL_FOCUS,
 343                         wxFocusEventHandler(wxAnyButton::GTKOnFocus));
 344             }
 345             else // no valid focused bitmap
 346             {
 347                 Disconnect(wxEVT_SET_FOCUS,
 348                            wxFocusEventHandler(wxAnyButton::GTKOnFocus));
 349                 Disconnect(wxEVT_KILL_FOCUS,
 350                            wxFocusEventHandler(wxAnyButton::GTKOnFocus));
 351             }
 352             break;
 353
 354         default:
 355             // no callbacks to connect/disconnect
 356             ;
 357     }
 358
 359     m_bitmaps[which] = bitmap;
 360
 361     // update the bitmap immediately if necessary, otherwise it will be done
 362     // when the bitmap for the corresponding state is needed the next time by
 363     // GTKUpdateBitmap()
 364     if ( bitmap.IsOk() && which == GTKGetCurrentState() )
 365     {
 366         GTKDoShowBitmap(bitmap);
 367     }
 368 }
 369
 370 void wxAnyButton::DoSetBitmapPosition(wxDirection dir)
 371 {
 372 #ifdef __WXGTK210__
 373     if ( !gtk_check_version(2,10,0) )
 374     {
 375         GtkPositionType gtkpos;
 376         switch ( dir )
 377         {
 378             default:
 379                 wxFAIL_MSG( "invalid position" );
 380                 // fall through
 381
 382             case wxLEFT:
 383                 gtkpos = GTK_POS_LEFT;
 384                 break;
 385
 386             case wxRIGHT:
 387                 gtkpos = GTK_POS_RIGHT;
 388                 break;
 389
 390             case wxTOP:
 391                 gtkpos = GTK_POS_TOP;
 392                 break;
 393
 394             case wxBOTTOM:
 395                 gtkpos = GTK_POS_BOTTOM;
 396                 break;
 397         }
 398
 399         gtk_button_set_image_position(GTK_BUTTON(m_widget), gtkpos);
 400         InvalidateBestSize();
 401     }
 402 #endif // GTK+ 2.10+
 403 }
 404
 405 #endif // wxHAS_ANY_BUTTON