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 <gtk/gtk.h>
  26
  27
  28 // ============================================================================
  29 // implementation
  30 // ============================================================================
  31
  32 void gdk_pixbuf_area_updated(GdkPixbufLoader *loader,
  33                              gint             x,
  34                              gint             y,
  35                              gint             width,
  36                              gint             height,
  37                              wxAnimation      *anim)
  38 {
  39     if (anim && anim->GetPixbuf() == NULL)
  40     {
  41         // we need to set the pixbuf only if this is the first time this signal
  42         // has been called!
  43         anim->SetPixbuf(gdk_pixbuf_loader_get_animation(loader));
  44     }
  45 }
  46
  47
  48 //-----------------------------------------------------------------------------
  49 // wxAnimation
  50 //-----------------------------------------------------------------------------
  51
  52 IMPLEMENT_DYNAMIC_CLASS(wxAnimation, wxAnimationBase)
  53
  54 wxAnimation::wxAnimation(const wxAnimation& that)
  55     : base_type(that)
  56 {
  57     m_pixbuf = that.m_pixbuf;
  58     if (m_pixbuf)
  59         g_object_ref(m_pixbuf);
  60 }
  61
  62 wxAnimation::wxAnimation(GdkPixbufAnimation *p)
  63 {
  64     m_pixbuf = p;
  65     if ( m_pixbuf )
  66         g_object_ref(m_pixbuf);
  67 }
  68
  69 wxAnimation& wxAnimation::operator=(const wxAnimation& that)
  70 {
  71     if (this != &that)
  72     {
  73         base_type::operator=(that);
  74         UnRef();
  75         m_pixbuf = that.m_pixbuf;
  76         if (m_pixbuf)
  77             g_object_ref(m_pixbuf);
  78     }
  79     return *this;
  80 }
  81
  82 bool wxAnimation::LoadFile(const wxString &name, wxAnimationType WXUNUSED(type))
  83 {
  84     UnRef();
  85     m_pixbuf = gdk_pixbuf_animation_new_from_file(
  86         wxConvFileName->cWX2MB(name), NULL);
  87     return IsOk();
  88 }
  89
  90 bool wxAnimation::Load(wxInputStream &stream, wxAnimationType type)
  91 {
  92     UnRef();
  93
  94     char anim_type[12];
  95     switch (type)
  96     {
  97     case wxANIMATION_TYPE_GIF:
  98         strcpy(anim_type, "gif");
  99         break;
 100
 101     case wxANIMATION_TYPE_ANI:
 102         strcpy(anim_type, "ani");
 103         break;
 104
 105     default:
 106         anim_type[0] = '\0';
 107         break;
 108     }
 109
 110     // create a GdkPixbufLoader
 111     GError *error = NULL;
 112     GdkPixbufLoader *loader;
 113     if (type != wxANIMATION_TYPE_INVALID && type != wxANIMATION_TYPE_ANY)
 114         loader = gdk_pixbuf_loader_new_with_type(anim_type, &error);
 115     else
 116         loader = gdk_pixbuf_loader_new();
 117
 118     if (!loader)
 119     {
 120         wxLogDebug(wxT("Could not create the loader for '%s' animation type"), anim_type);
 121         return false;
 122     }
 123
 124     // connect to loader signals
 125     g_signal_connect(loader, "area-updated", G_CALLBACK(gdk_pixbuf_area_updated), this);
 126
 127     guchar buf[2048];
 128     while (stream.IsOk())
 129     {
 130         // read a chunk of data
 131         stream.Read(buf, sizeof(buf));
 132
 133         // fetch all data into the loader
 134         if (!gdk_pixbuf_loader_write(loader, buf, stream.LastRead(), &error))
 135         {
 136             gdk_pixbuf_loader_close(loader, &error);
 137             wxLogDebug(wxT("Could not write to the loader"));
 138             return false;
 139         }
 140     }
 141
 142     // load complete
 143     if (!gdk_pixbuf_loader_close(loader, &error))
 144     {
 145         wxLogDebug(wxT("Could not close the loader"));
 146         return false;
 147     }
 148
 149     // wait until we get the last area_updated signal
 150     return true;
 151 }
 152
 153 wxImage wxAnimation::GetFrame(unsigned int WXUNUSED(frame)) const
 154 {
 155     return wxNullImage;
 156 }
 157
 158 wxSize wxAnimation::GetSize() const
 159 {
 160     return wxSize(gdk_pixbuf_animation_get_width(m_pixbuf),
 161                   gdk_pixbuf_animation_get_height(m_pixbuf));
 162 }
 163
 164 void wxAnimation::UnRef()
 165 {
 166     if (m_pixbuf)
 167         g_object_unref(m_pixbuf);
 168     m_pixbuf = NULL;
 169 }
 170
 171 void wxAnimation::SetPixbuf(GdkPixbufAnimation* p)
 172 {
 173     UnRef();
 174     m_pixbuf = p;
 175     if (m_pixbuf)
 176         g_object_ref(m_pixbuf);
 177 }
 178
 179 //-----------------------------------------------------------------------------
 180 // wxAnimationCtrl
 181 //-----------------------------------------------------------------------------
 182
 183 IMPLEMENT_DYNAMIC_CLASS(wxAnimationCtrl, wxAnimationCtrlBase)
 184 BEGIN_EVENT_TABLE(wxAnimationCtrl, wxAnimationCtrlBase)
 185     EVT_TIMER(wxID_ANY, wxAnimationCtrl::OnTimer)
 186 END_EVENT_TABLE()
 187
 188 void wxAnimationCtrl::Init()
 189 {
 190     m_anim = NULL;
 191     m_iter = NULL;
 192     m_bPlaying = false;
 193 }
 194
 195 bool wxAnimationCtrl::Create( wxWindow *parent, wxWindowID id,
 196                               const wxAnimation& anim,
 197                               const wxPoint& pos,
 198                               const wxSize& size,
 199                               long style,
 200                               const wxString& name)
 201 {
 202     m_needParent = true;
 203
 204     if (!PreCreation( parent, pos, size ) ||
 205         !base_type::CreateBase(parent, id, pos, size, style & wxWINDOW_STYLE_MASK,
 206                                wxDefaultValidator, name))
 207     {
 208         wxFAIL_MSG( wxT("wxAnimationCtrl creation failed") );
 209         return false;
 210     }
 211
 212     SetWindowStyle(style);
 213
 214     m_widget = gtk_image_new();
 215     gtk_widget_show( GTK_WIDGET(m_widget) );
 216
 217     m_parent->DoAddChild( this );
 218
 219     PostCreation(size);
 220     SetInitialSize(size);
 221
 222     if (anim.IsOk())
 223         SetAnimation(anim);
 224
 225     // init the timer used for animation
 226     m_timer.SetOwner(this);
 227
 228     return true;
 229 }
 230
 231 wxAnimationCtrl::~wxAnimationCtrl()
 232 {
 233     ResetAnim();
 234     ResetIter();
 235 }
 236
 237 bool wxAnimationCtrl::LoadFile(const wxString &filename, wxAnimationType type)
 238 {
 239     wxAnimation anim;
 240     if (!anim.LoadFile(filename, type))
 241         return false;
 242
 243     SetAnimation(anim);
 244     return true;
 245 }
 246
 247 void wxAnimationCtrl::SetAnimation(const wxAnimation &anim)
 248 {
 249     if (IsPlaying())
 250         Stop();
 251
 252     ResetAnim();
 253     ResetIter();
 254
 255     // copy underlying GdkPixbuf object
 256     m_anim = anim.GetPixbuf();
 257
 258     // m_anim may be null in case wxNullAnimation has been passed
 259     if (m_anim)
 260     {
 261         // add a reference to the GdkPixbufAnimation
 262         g_object_ref(m_anim);
 263
 264         if (!this->HasFlag(wxAC_NO_AUTORESIZE))
 265             FitToAnimation();
 266     }
 267
 268     DisplayStaticImage();
 269 }
 270
 271 void wxAnimationCtrl::FitToAnimation()
 272 {
 273     if (!m_anim)
 274         return;
 275
 276     int w = gdk_pixbuf_animation_get_width(m_anim),
 277         h = gdk_pixbuf_animation_get_height(m_anim);
 278
 279     // update our size to fit animation
 280     SetSize(w, h);
 281 }
 282
 283 void wxAnimationCtrl::ResetAnim()
 284 {
 285     if (m_anim)
 286         g_object_unref(m_anim);
 287     m_anim = NULL;
 288 }
 289
 290 void wxAnimationCtrl::ResetIter()
 291 {
 292     if (m_iter)
 293         g_object_unref(m_iter);
 294     m_iter = NULL;
 295 }
 296
 297 bool wxAnimationCtrl::Play()
 298 {
 299     if (m_anim == NULL)
 300         return false;
 301
 302     // init the iterator and start a one-shot timer
 303     ResetIter();
 304     m_iter = gdk_pixbuf_animation_get_iter (m_anim, NULL);
 305     m_bPlaying = true;
 306
 307     // gdk_pixbuf_animation_iter_get_delay_time() may return -1 which means
 308     // that the timer should not start
 309     int n = gdk_pixbuf_animation_iter_get_delay_time(m_iter);
 310     if (n >= 0)
 311         m_timer.Start(n, true);
 312
 313     return true;
 314 }
 315
 316 void wxAnimationCtrl::Stop()
 317 {
 318     // leave current frame displayed until Play() is called again
 319     if (IsPlaying())
 320         m_timer.Stop();
 321     m_bPlaying = false;
 322
 323     ResetIter();
 324     DisplayStaticImage();
 325 }
 326
 327 void wxAnimationCtrl::DisplayStaticImage()
 328 {
 329     wxASSERT(!IsPlaying());
 330
 331     // m_bmpStaticReal will be updated only if necessary...
 332     UpdateStaticImage();
 333
 334     if (m_bmpStaticReal.IsOk())
 335     {
 336         // show inactive bitmap
 337         GdkBitmap *mask = (GdkBitmap *) NULL;
 338         if (m_bmpStaticReal.GetMask())
 339             mask = m_bmpStaticReal.GetMask()->GetBitmap();
 340
 341         if (m_bmpStaticReal.HasPixbuf())
 342         {
 343             gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget),
 344                                       m_bmpStaticReal.GetPixbuf());
 345         }
 346         else
 347         {
 348             gtk_image_set_from_pixmap(GTK_IMAGE(m_widget),
 349                                       m_bmpStaticReal.GetPixmap(), mask);
 350         }
 351     }
 352     else
 353     {
 354         if (m_anim)
 355         {
 356             // even if not clearly documented, gdk_pixbuf_animation_get_static_image()
 357             // always returns the first frame of the animation
 358             gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget),
 359                                         gdk_pixbuf_animation_get_static_image(m_anim));
 360         }
 361         else
 362         {
 363             ClearToBackgroundColour();
 364         }
 365     }
 366 }
 367
 368 bool wxAnimationCtrl::IsPlaying() const
 369 {
 370     // NB: we cannot just return m_timer.IsRunning() as this would not
 371     //     be safe as e.g. if we are displaying a frame forever,
 372     //     then we are "officially" still playing the animation, but
 373     //     the timer is not running anymore...
 374     return m_bPlaying;
 375 }
 376
 377 wxSize wxAnimationCtrl::DoGetBestSize() const
 378 {
 379     if (m_anim && !this->HasFlag(wxAC_NO_AUTORESIZE))
 380     {
 381         return wxSize(gdk_pixbuf_animation_get_width(m_anim),
 382                       gdk_pixbuf_animation_get_height(m_anim));
 383     }
 384
 385     return wxSize(100,100);
 386 }
 387
 388 void wxAnimationCtrl::ClearToBackgroundColour()
 389 {
 390     wxSize sz = GetClientSize();
 391     GdkPixbuf *newpix = gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8,
 392                                        sz.GetWidth(), sz.GetHeight());
 393     if (!newpix)
 394         return;
 395
 396     wxColour clr = GetBackgroundColour();
 397     guint32 col = (clr.Red() << 24) | (clr.Green() << 16) | (clr.Blue() << 8);
 398     gdk_pixbuf_fill(newpix, col);
 399
 400     gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget), newpix);
 401     g_object_unref(newpix);
 402 }
 403
 404 bool wxAnimationCtrl::SetBackgroundColour( const wxColour &colour )
 405 {
 406     // wxWindowGTK::SetBackgroundColour works but since our m_widget is a GtkImage
 407     // it won't show the background colour unlike the user would expect.
 408     // Thus we clear the GtkImage contents to the background colour...
 409     if (!wxControl::SetBackgroundColour(colour))
 410         return false;
 411
 412     // if not playing the change must take place immediately but
 413     // remember that the inactive bitmap has higher priority over the background
 414     // colour; DisplayStaticImage() will handle that
 415     if ( !IsPlaying() )
 416         DisplayStaticImage();
 417
 418     return true;
 419 }
 420
 421
 422 //-----------------------------------------------------------------------------
 423 // wxAnimationCtrl - event handlers
 424 //-----------------------------------------------------------------------------
 425
 426 void wxAnimationCtrl::OnTimer(wxTimerEvent &ev)
 427 {
 428     wxASSERT(m_iter != NULL);
 429
 430     // gdk_pixbuf_animation_iter_advance() will automatically restart
 431     // the animation, if necessary and we have no way to know !!
 432     if (gdk_pixbuf_animation_iter_advance(m_iter, NULL))
 433     {
 434         // start a new one-shot timer
 435         int n = gdk_pixbuf_animation_iter_get_delay_time(m_iter);
 436         if (n >= 0)
 437             m_timer.Start(n, true);
 438
 439         gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget),
 440                                   gdk_pixbuf_animation_iter_get_pixbuf(m_iter));
 441     }
 442     else
 443     {
 444         // no need to update the m_widget yet
 445         m_timer.Start(10, true);
 446     }
 447 }
 448
 449 #endif      // wxUSE_ANIMATIONCTRL