src/gtk/animate.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/animate.cpp
   3 // Purpose:     wxAnimation and wxAnimationCtrl
   4 // Author:      Francesco Montorsi
   5 // Modified By:
   6 // Created:     24/09/2006
   7 // Id:          $Id$
   8 // Copyright:   (c) Francesco Montorsi
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #if wxUSE_ANIMATIONCTRL && !defined(__WXUNIVERSAL__)
  16
  17 #include "wx/animate.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/image.h"
  21     #include "wx/log.h"
  22     #include "wx/stream.h"
  23 #endif
  24
  25 #include "wx/wfstream.h"
  26
  27 #include <gtk/gtk.h>
  28
  29
  30 // ============================================================================
  31 // implementation
  32 // ============================================================================
  33
  34 void gdk_pixbuf_area_updated(GdkPixbufLoader *loader,
  35                              gint             WXUNUSED(x),
  36                              gint             WXUNUSED(y),
  37                              gint             WXUNUSED(width),
  38                              gint             WXUNUSED(height),
  39                              wxAnimation      *anim)
  40 {
  41     if (anim && anim->GetPixbuf() == NULL)
  42     {
  43         // we need to set the pixbuf only if this is the first time this signal
  44         // has been called!
  45         anim->SetPixbuf(gdk_pixbuf_loader_get_animation(loader));
  46     }
  47 }
  48
  49
  50 //-----------------------------------------------------------------------------
  51 // wxAnimation
  52 //-----------------------------------------------------------------------------
  53
  54 IMPLEMENT_DYNAMIC_CLASS(wxAnimation, wxAnimationBase)
  55
  56 wxAnimation::wxAnimation(const wxAnimation& that)
  57     : base_type(that)
  58 {
  59     m_pixbuf = that.m_pixbuf;
  60     if (m_pixbuf)
  61         g_object_ref(m_pixbuf);
  62 }
  63
  64 wxAnimation::wxAnimation(GdkPixbufAnimation *p)
  65 {
  66     m_pixbuf = p;
  67     if ( m_pixbuf )
  68         g_object_ref(m_pixbuf);
  69 }
  70
  71 wxAnimation& wxAnimation::operator=(const wxAnimation& that)
  72 {
  73     if (this != &that)
  74     {
  75         base_type::operator=(that);
  76         UnRef();
  77         m_pixbuf = that.m_pixbuf;
  78         if (m_pixbuf)
  79             g_object_ref(m_pixbuf);
  80     }
  81     return *this;
  82 }
  83
  84 bool wxAnimation::LoadFile(const wxString &name, wxAnimationType WXUNUSED(type))
  85 {
  86     UnRef();
  87     m_pixbuf = gdk_pixbuf_animation_new_from_file(name.fn_str(), NULL);
  88     return IsOk();
  89 }
  90
  91 bool wxAnimation::Load(wxInputStream &stream, wxAnimationType type)
  92 {
  93     UnRef();
  94
  95     char anim_type[12];
  96     switch (type)
  97     {
  98     case wxANIMATION_TYPE_GIF:
  99         strcpy(anim_type, "gif");
 100         break;
 101
 102     case wxANIMATION_TYPE_ANI:
 103         strcpy(anim_type, "ani");
 104         break;
 105
 106     default:
 107         anim_type[0] = '\0';
 108         break;
 109     }
 110
 111     // create a GdkPixbufLoader
 112     GError *error = NULL;
 113     GdkPixbufLoader *loader;
 114     if (type != wxANIMATION_TYPE_INVALID && type != wxANIMATION_TYPE_ANY)
 115         loader = gdk_pixbuf_loader_new_with_type(anim_type, &error);
 116     else
 117         loader = gdk_pixbuf_loader_new();
 118
 119     if (!loader ||
 120         error != NULL)  // even if the loader was allocated, an error could have happened
 121     {
 122         wxLogDebug(wxT("Could not create the loader for '%s' animation type: %s"),
 123                    anim_type, error->message);
 124         return false;
 125     }
 126
 127     // connect to loader signals
 128     g_signal_connect(loader, "area-updated", G_CALLBACK(gdk_pixbuf_area_updated), this);
 129
 130     guchar buf[2048];
 131     bool data_written = false;
 132     while (stream.IsOk())
 133     {
 134         // read a chunk of data
 135         if (!stream.Read(buf, sizeof(buf)) &&
 136             stream.GetLastError() != wxSTREAM_EOF)   // EOF is OK for now
 137         {
 138             // gdk_pixbuf_loader_close wants the GError == NULL
 139             gdk_pixbuf_loader_close(loader, NULL);
 140             return false;
 141         }
 142
 143         // fetch all data into the loader
 144         if (!gdk_pixbuf_loader_write(loader, buf, stream.LastRead(), &error))
 145         {
 146             wxLogDebug(wxT("Could not write to the loader: %s"), error->message);
 147
 148             // gdk_pixbuf_loader_close wants the GError == NULL
 149             gdk_pixbuf_loader_close(loader, NULL);
 150             return false;
 151         }
 152
 153         data_written = true;
 154     }
 155
 156     if (!data_written)
 157     {
 158         wxLogDebug("Could not read data from the stream...");
 159         return false;
 160     }
 161
 162     // load complete: gdk_pixbuf_loader_close will now check if the data we
 163     // wrote inside the pixbuf loader does make sense and will give an error
 164     // if it doesn't (because of a truncated file, corrupted data or whatelse)
 165     if (!gdk_pixbuf_loader_close(loader, &error))
 166     {
 167         wxLogDebug(wxT("Could not close the loader: %s"), error->message);
 168         return false;
 169     }
 170
 171     // wait until we get the last area_updated signal
 172     return data_written;
 173 }
 174
 175 wxImage wxAnimation::GetFrame(unsigned int WXUNUSED(frame)) const
 176 {
 177     return wxNullImage;
 178 }
 179
 180 wxSize wxAnimation::GetSize() const
 181 {
 182     return wxSize(gdk_pixbuf_animation_get_width(m_pixbuf),
 183                   gdk_pixbuf_animation_get_height(m_pixbuf));
 184 }
 185
 186 void wxAnimation::UnRef()
 187 {
 188     if (m_pixbuf)
 189         g_object_unref(m_pixbuf);
 190     m_pixbuf = NULL;
 191 }
 192
 193 void wxAnimation::SetPixbuf(GdkPixbufAnimation* p)
 194 {
 195     UnRef();
 196     m_pixbuf = p;
 197     if (m_pixbuf)
 198         g_object_ref(m_pixbuf);
 199 }
 200
 201 //-----------------------------------------------------------------------------
 202 // wxAnimationCtrl
 203 //-----------------------------------------------------------------------------
 204
 205 IMPLEMENT_DYNAMIC_CLASS(wxAnimationCtrl, wxAnimationCtrlBase)
 206 BEGIN_EVENT_TABLE(wxAnimationCtrl, wxAnimationCtrlBase)
 207     EVT_TIMER(wxID_ANY, wxAnimationCtrl::OnTimer)
 208 END_EVENT_TABLE()
 209
 210 void wxAnimationCtrl::Init()
 211 {
 212     m_anim = NULL;
 213     m_iter = NULL;
 214     m_bPlaying = false;
 215 }
 216
 217 bool wxAnimationCtrl::Create( wxWindow *parent, wxWindowID id,
 218                               const wxAnimation& anim,
 219                               const wxPoint& pos,
 220                               const wxSize& size,
 221                               long style,
 222                               const wxString& name)
 223 {
 224     if (!PreCreation( parent, pos, size ) ||
 225         !base_type::CreateBase(parent, id, pos, size, style & wxWINDOW_STYLE_MASK,
 226                                wxDefaultValidator, name))
 227     {
 228         wxFAIL_MSG( wxT("wxAnimationCtrl creation failed") );
 229         return false;
 230     }
 231
 232     SetWindowStyle(style);
 233
 234     m_widget = gtk_image_new();
 235     g_object_ref(m_widget);
 236     gtk_widget_show(m_widget);
 237
 238     m_parent->DoAddChild( this );
 239
 240     PostCreation(size);
 241     SetInitialSize(size);
 242
 243     if (anim.IsOk())
 244         SetAnimation(anim);
 245
 246     // init the timer used for animation
 247     m_timer.SetOwner(this);
 248
 249     return true;
 250 }
 251
 252 wxAnimationCtrl::~wxAnimationCtrl()
 253 {
 254     ResetAnim();
 255     ResetIter();
 256 }
 257
 258 bool wxAnimationCtrl::LoadFile(const wxString &filename, wxAnimationType type)
 259 {
 260     wxFileInputStream fis(filename);
 261     if (!fis.IsOk())
 262         return false;
 263     return Load(fis, type);
 264 }
 265
 266 bool wxAnimationCtrl::Load(wxInputStream& stream, wxAnimationType type)
 267 {
 268     wxAnimation anim;
 269     if ( !anim.Load(stream, type) || !anim.IsOk() )
 270         return false;
 271
 272     SetAnimation(anim);
 273     return true;
 274 }
 275
 276 void wxAnimationCtrl::SetAnimation(const wxAnimation &anim)
 277 {
 278     if (IsPlaying())
 279         Stop();
 280
 281     ResetAnim();
 282     ResetIter();
 283
 284     // copy underlying GdkPixbuf object
 285     m_anim = anim.GetPixbuf();
 286
 287     // m_anim may be null in case wxNullAnimation has been passed
 288     if (m_anim)
 289     {
 290         // add a reference to the GdkPixbufAnimation
 291         g_object_ref(m_anim);
 292
 293         if (!this->HasFlag(wxAC_NO_AUTORESIZE))
 294             FitToAnimation();
 295     }
 296
 297     DisplayStaticImage();
 298 }
 299
 300 void wxAnimationCtrl::FitToAnimation()
 301 {
 302     if (!m_anim)
 303         return;
 304
 305     int w = gdk_pixbuf_animation_get_width(m_anim),
 306         h = gdk_pixbuf_animation_get_height(m_anim);
 307
 308     // update our size to fit animation
 309     SetSize(w, h);
 310 }
 311
 312 void wxAnimationCtrl::ResetAnim()
 313 {
 314     if (m_anim)
 315         g_object_unref(m_anim);
 316     m_anim = NULL;
 317 }
 318
 319 void wxAnimationCtrl::ResetIter()
 320 {
 321     if (m_iter)
 322         g_object_unref(m_iter);
 323     m_iter = NULL;
 324 }
 325
 326 bool wxAnimationCtrl::Play()
 327 {
 328     if (m_anim == NULL)
 329         return false;
 330
 331     // init the iterator and start a one-shot timer
 332     ResetIter();
 333     m_iter = gdk_pixbuf_animation_get_iter (m_anim, NULL);
 334     m_bPlaying = true;
 335
 336     // gdk_pixbuf_animation_iter_get_delay_time() may return -1 which means
 337     // that the timer should not start
 338     int n = gdk_pixbuf_animation_iter_get_delay_time(m_iter);
 339     if (n >= 0)
 340         m_timer.Start(n, true);
 341
 342     return true;
 343 }
 344
 345 void wxAnimationCtrl::Stop()
 346 {
 347     // leave current frame displayed until Play() is called again
 348     if (IsPlaying())
 349         m_timer.Stop();
 350     m_bPlaying = false;
 351
 352     ResetIter();
 353     DisplayStaticImage();
 354 }
 355
 356 void wxAnimationCtrl::DisplayStaticImage()
 357 {
 358     wxASSERT(!IsPlaying());
 359
 360     // m_bmpStaticReal will be updated only if necessary...
 361     UpdateStaticImage();
 362
 363     if (m_bmpStaticReal.IsOk())
 364     {
 365         // show inactive bitmap
 366         GdkBitmap *mask = NULL;
 367         if (m_bmpStaticReal.GetMask())
 368             mask = m_bmpStaticReal.GetMask()->GetBitmap();
 369
 370         if (m_bmpStaticReal.HasPixbuf())
 371         {
 372             gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget),
 373                                       m_bmpStaticReal.GetPixbuf());
 374         }
 375         else
 376         {
 377             gtk_image_set_from_pixmap(GTK_IMAGE(m_widget),
 378                                       m_bmpStaticReal.GetPixmap(), mask);
 379         }
 380     }
 381     else
 382     {
 383         if (m_anim)
 384         {
 385             // even if not clearly documented, gdk_pixbuf_animation_get_static_image()
 386             // always returns the first frame of the animation
 387             gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget),
 388                                         gdk_pixbuf_animation_get_static_image(m_anim));
 389         }
 390         else
 391         {
 392             ClearToBackgroundColour();
 393         }
 394     }
 395 }
 396
 397 bool wxAnimationCtrl::IsPlaying() const
 398 {
 399     // NB: we cannot just return m_timer.IsRunning() as this would not
 400     //     be safe as e.g. if we are displaying a frame forever,
 401     //     then we are "officially" still playing the animation, but
 402     //     the timer is not running anymore...
 403     return m_bPlaying;
 404 }
 405
 406 wxSize wxAnimationCtrl::DoGetBestSize() const
 407 {
 408     if (m_anim && !this->HasFlag(wxAC_NO_AUTORESIZE))
 409     {
 410         return wxSize(gdk_pixbuf_animation_get_width(m_anim),
 411                       gdk_pixbuf_animation_get_height(m_anim));
 412     }
 413
 414     return wxSize(100,100);
 415 }
 416
 417 void wxAnimationCtrl::ClearToBackgroundColour()
 418 {
 419     wxSize sz = GetClientSize();
 420     GdkPixbuf *newpix = gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8,
 421                                        sz.GetWidth(), sz.GetHeight());
 422     if (!newpix)
 423         return;
 424
 425     wxColour clr = GetBackgroundColour();
 426     guint32 col = (clr.Red() << 24) | (clr.Green() << 16) | (clr.Blue() << 8);
 427     gdk_pixbuf_fill(newpix, col);
 428
 429     gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget), newpix);
 430     g_object_unref(newpix);
 431 }
 432
 433 bool wxAnimationCtrl::SetBackgroundColour( const wxColour &colour )
 434 {
 435     // wxWindowGTK::SetBackgroundColour works but since our m_widget is a GtkImage
 436     // it won't show the background colour unlike the user would expect.
 437     // Thus we clear the GtkImage contents to the background colour...
 438     if (!wxControl::SetBackgroundColour(colour))
 439         return false;
 440
 441     // if not playing the change must take place immediately but
 442     // remember that the inactive bitmap has higher priority over the background
 443     // colour; DisplayStaticImage() will handle that
 444     if ( !IsPlaying() )
 445         DisplayStaticImage();
 446
 447     return true;
 448 }
 449
 450
 451 //-----------------------------------------------------------------------------
 452 // wxAnimationCtrl - event handlers
 453 //-----------------------------------------------------------------------------
 454
 455 void wxAnimationCtrl::OnTimer(wxTimerEvent& WXUNUSED(ev))
 456 {
 457     wxASSERT(m_iter != NULL);
 458
 459     // gdk_pixbuf_animation_iter_advance() will automatically restart
 460     // the animation, if necessary and we have no way to know !!
 461     if (gdk_pixbuf_animation_iter_advance(m_iter, NULL))
 462     {
 463         // start a new one-shot timer
 464         int n = gdk_pixbuf_animation_iter_get_delay_time(m_iter);
 465         if (n >= 0)
 466             m_timer.Start(n, true);
 467
 468         gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget),
 469                                   gdk_pixbuf_animation_iter_get_pixbuf(m_iter));
 470     }
 471     else
 472     {
 473         // no need to update the m_widget yet
 474         m_timer.Start(10, true);
 475     }
 476 }
 477
 478 #endif      // wxUSE_ANIMATIONCTRL