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(size_t i) 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     m_acceptsFocus = true;
 204
 205     if (!PreCreation( parent, pos, size ) ||
 206         !base_type::CreateBase(parent, id, pos, size, style & wxWINDOW_STYLE_MASK,
 207                                wxDefaultValidator, name))
 208     {
 209         wxFAIL_MSG( wxT("wxAnimationCtrl creation failed") );
 210         return false;
 211     }
 212
 213     SetWindowStyle(style);
 214
 215     m_widget = gtk_image_new();
 216     gtk_widget_show( GTK_WIDGET(m_widget) );
 217
 218     m_parent->DoAddChild( this );
 219
 220     PostCreation(size);
 221     SetInitialSize(size);
 222
 223     if (anim.IsOk())
 224         SetAnimation(anim);
 225
 226     // init the timer used for animation
 227     m_timer.SetOwner(this);
 228
 229     return true;
 230 }
 231
 232 wxAnimationCtrl::~wxAnimationCtrl()
 233 {
 234     ResetAnim();
 235     ResetIter();
 236 }
 237
 238 bool wxAnimationCtrl::LoadFile(const wxString &filename, wxAnimationType type)
 239 {
 240     wxAnimation anim;
 241     if (!anim.LoadFile(filename, type))
 242         return false;
 243
 244     SetAnimation(anim);
 245     return true;
 246 }
 247
 248 void wxAnimationCtrl::SetAnimation(const wxAnimation &anim)
 249 {
 250     if (IsPlaying())
 251         Stop();
 252
 253     ResetAnim();
 254     ResetIter();
 255
 256     // copy underlying GdkPixbuf object
 257     m_anim = anim.GetPixbuf();
 258
 259     // m_anim may be null in case wxNullAnimation has been passed
 260     if (m_anim)
 261     {
 262         // add a reference to the GdkPixbufAnimation
 263         g_object_ref(m_anim);
 264
 265         if (!this->HasFlag(wxAC_NO_AUTORESIZE))
 266             FitToAnimation();
 267     }
 268
 269     DisplayStaticImage();
 270 }
 271
 272 void wxAnimationCtrl::FitToAnimation()
 273 {
 274     if (!m_anim)
 275         return;
 276
 277     int w = gdk_pixbuf_animation_get_width(m_anim),
 278         h = gdk_pixbuf_animation_get_height(m_anim);
 279
 280     // update our size to fit animation
 281     SetSize(w, h);
 282 }
 283
 284 void wxAnimationCtrl::ResetAnim()
 285 {
 286     if (m_anim)
 287         g_object_unref(m_anim);
 288     m_anim = NULL;
 289 }
 290
 291 void wxAnimationCtrl::ResetIter()
 292 {
 293     if (m_iter)
 294         g_object_unref(m_iter);
 295     m_iter = NULL;
 296 }
 297
 298 bool wxAnimationCtrl::Play()
 299 {
 300     if (m_anim == NULL)
 301         return false;
 302
 303     // init the iterator and start a one-shot timer
 304     ResetIter();
 305     m_iter = gdk_pixbuf_animation_get_iter (m_anim, NULL);
 306     m_bPlaying = true;
 307
 308     // gdk_pixbuf_animation_iter_get_delay_time() may return -1 which means
 309     // that the timer should not start
 310     int n = gdk_pixbuf_animation_iter_get_delay_time(m_iter);
 311     if (n >= 0)
 312         m_timer.Start(n, true);
 313
 314     return true;
 315 }
 316
 317 void wxAnimationCtrl::Stop()
 318 {
 319     // leave current frame displayed until Play() is called again
 320     if (IsPlaying())
 321         m_timer.Stop();
 322     m_bPlaying = false;
 323
 324     ResetIter();
 325     DisplayStaticImage();
 326 }
 327
 328 void wxAnimationCtrl::DisplayStaticImage()
 329 {
 330     wxASSERT(!IsPlaying());
 331
 332     // m_bmpStaticReal will be updated only if necessary...
 333     UpdateStaticImage();
 334
 335     if (m_bmpStaticReal.IsOk())
 336     {
 337         // show inactive bitmap
 338         GdkBitmap *mask = (GdkBitmap *) NULL;
 339         if (m_bmpStaticReal.GetMask())
 340             mask = m_bmpStaticReal.GetMask()->GetBitmap();
 341
 342         if (m_bmpStaticReal.HasPixbuf())
 343         {
 344             gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget),
 345                                       m_bmpStaticReal.GetPixbuf());
 346         }
 347         else
 348         {
 349             gtk_image_set_from_pixmap(GTK_IMAGE(m_widget),
 350                                       m_bmpStaticReal.GetPixmap(), mask);
 351         }
 352     }
 353     else
 354     {
 355         if (m_anim)
 356         {
 357             // even if not clearly documented, gdk_pixbuf_animation_get_static_image()
 358             // always returns the first frame of the animation
 359             gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget),
 360                                         gdk_pixbuf_animation_get_static_image(m_anim));
 361         }
 362         else
 363         {
 364             ClearToBackgroundColour();
 365         }
 366     }
 367 }
 368
 369 bool wxAnimationCtrl::IsPlaying() const
 370 {
 371     // NB: we cannot just return m_timer.IsRunning() as this would not
 372     //     be safe as e.g. if we are displaying a frame forever,
 373     //     then we are "officially" still playing the animation, but
 374     //     the timer is not running anymore...
 375     return m_bPlaying;
 376 }
 377
 378 wxSize wxAnimationCtrl::DoGetBestSize() const
 379 {
 380     if (m_anim && !this->HasFlag(wxAC_NO_AUTORESIZE))
 381     {
 382         return wxSize(gdk_pixbuf_animation_get_width(m_anim),
 383                       gdk_pixbuf_animation_get_height(m_anim));
 384     }
 385
 386     return wxSize(100,100);
 387 }
 388
 389 void wxAnimationCtrl::ClearToBackgroundColour()
 390 {
 391     wxSize sz = GetClientSize();
 392     GdkPixbuf *newpix = gdk_pixbuf_new(GDK_COLORSPACE_RGB, false, 8,
 393                                        sz.GetWidth(), sz.GetHeight());
 394     if (!newpix)
 395         return;
 396
 397     wxColour clr = GetBackgroundColour();
 398     guint32 col = (clr.Red() << 24) | (clr.Green() << 16) | (clr.Blue() << 8);
 399     gdk_pixbuf_fill(newpix, col);
 400
 401     gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget), newpix);
 402     g_object_unref(newpix);
 403 }
 404
 405 bool wxAnimationCtrl::SetBackgroundColour( const wxColour &colour )
 406 {
 407     // wxWindowGTK::SetBackgroundColour works but since our m_widget is a GtkImage
 408     // it won't show the background colour unlike the user would expect.
 409     // Thus we clear the GtkImage contents to the background colour...
 410     if (!wxControl::SetBackgroundColour(colour))
 411         return false;
 412
 413     // if not playing the change must take place immediately but
 414     // remember that the inactive bitmap has higher priority over the background
 415     // colour; DisplayStaticImage() will handle that
 416     if ( !IsPlaying() )
 417         DisplayStaticImage();
 418
 419     return true;
 420 }
 421
 422
 423 //-----------------------------------------------------------------------------
 424 // wxAnimationCtrl - event handlers
 425 //-----------------------------------------------------------------------------
 426
 427 void wxAnimationCtrl::OnTimer(wxTimerEvent &ev)
 428 {
 429     wxASSERT(m_iter != NULL);
 430
 431     // gdk_pixbuf_animation_iter_advance() will automatically restart
 432     // the animation, if necessary and we have no way to know !!
 433     if (gdk_pixbuf_animation_iter_advance(m_iter, NULL))
 434     {
 435         // start a new one-shot timer
 436         int n = gdk_pixbuf_animation_iter_get_delay_time(m_iter);
 437         if (n >= 0)
 438             m_timer.Start(n, true);
 439
 440         gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget),
 441                                   gdk_pixbuf_animation_iter_get_pixbuf(m_iter));
 442     }
 443     else
 444     {
 445         // no need to update the m_widget yet
 446         m_timer.Start(10, true);
 447     }
 448 }
 449
 450 #endif      // wxUSE_ANIMATIONCTRL