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::operator=(const wxAnimation& that)
  63 {
  64     if (this != &that)
  65     {
  66         base_type::operator=(that);
  67         UnRef();
  68         m_pixbuf = that.m_pixbuf;
  69         if (m_pixbuf)
  70             g_object_ref(m_pixbuf);
  71     }
  72     return *this;
  73 }
  74
  75 bool wxAnimation::LoadFile(const wxString &name, wxAnimationType WXUNUSED(type))
  76 {
  77     UnRef();
  78     m_pixbuf = gdk_pixbuf_animation_new_from_file(
  79         wxConvFileName->cWX2MB(name), NULL);
  80     return IsOk();
  81 }
  82
  83 bool wxAnimation::Load(wxInputStream &stream, wxAnimationType type)
  84 {
  85     UnRef();
  86
  87     char anim_type[12];
  88     switch (type)
  89     {
  90     case wxANIMATION_TYPE_GIF:
  91         strcpy(anim_type, "gif");
  92         break;
  93
  94     case wxANIMATION_TYPE_ANI:
  95         strcpy(anim_type, "ani");
  96         break;
  97
  98     default:
  99         anim_type[0] = '\0';
 100         break;
 101     }
 102
 103     // create a GdkPixbufLoader
 104     GError *error = NULL;
 105     GdkPixbufLoader *loader;
 106     if (type != wxANIMATION_TYPE_INVALID && type != wxANIMATION_TYPE_ANY)
 107         loader = gdk_pixbuf_loader_new_with_type(anim_type, &error);
 108     else
 109         loader = gdk_pixbuf_loader_new();
 110
 111     if (!loader)
 112     {
 113         wxLogDebug(wxT("Could not create the loader for '%s' animation type"), anim_type);
 114         return false;
 115     }
 116
 117     // connect to loader signals
 118     g_signal_connect(loader, "area-updated", G_CALLBACK(gdk_pixbuf_area_updated), this);
 119
 120     guchar buf[2048];
 121     while (stream.IsOk())
 122     {
 123         // read a chunk of data
 124         stream.Read(buf, sizeof(buf));
 125
 126         // fetch all data into the loader
 127         if (!gdk_pixbuf_loader_write(loader, buf, stream.LastRead(), &error))
 128         {
 129             gdk_pixbuf_loader_close(loader, &error);
 130             wxLogDebug(wxT("Could not write to the loader"));
 131             return false;
 132         }
 133     }
 134
 135     // load complete
 136     if (!gdk_pixbuf_loader_close(loader, &error))
 137     {
 138         wxLogDebug(wxT("Could not close the loader"));
 139         return false;
 140     }
 141
 142     // wait until we get the last area_updated signal
 143     return true;
 144 }
 145
 146 wxImage wxAnimation::GetFrame(size_t i) const
 147 {
 148     return wxNullImage;
 149 }
 150
 151 wxSize wxAnimation::GetSize() const
 152 {
 153     return wxSize(gdk_pixbuf_animation_get_width(m_pixbuf),
 154                   gdk_pixbuf_animation_get_height(m_pixbuf));
 155 }
 156
 157 void wxAnimation::UnRef()
 158 {
 159     if (m_pixbuf)
 160         g_object_unref(m_pixbuf);
 161     m_pixbuf = NULL;
 162 }
 163
 164 void wxAnimation::SetPixbuf(GdkPixbufAnimation* p)
 165 {
 166     UnRef();
 167     m_pixbuf = p;
 168     if (m_pixbuf)
 169         g_object_ref(m_pixbuf);
 170 }
 171
 172 //-----------------------------------------------------------------------------
 173 // wxAnimationCtrl
 174 //-----------------------------------------------------------------------------
 175
 176 IMPLEMENT_DYNAMIC_CLASS(wxAnimationCtrl, wxAnimationCtrlBase)
 177 BEGIN_EVENT_TABLE(wxAnimationCtrl, wxAnimationCtrlBase)
 178     EVT_TIMER(wxID_ANY, wxAnimationCtrl::OnTimer)
 179 END_EVENT_TABLE()
 180
 181 void wxAnimationCtrl::Init()
 182 {
 183     m_anim = NULL;
 184     m_iter = NULL;
 185     m_bPlaying = false;
 186 }
 187
 188 bool wxAnimationCtrl::Create( wxWindow *parent, wxWindowID id,
 189                               const wxAnimation& anim,
 190                               const wxPoint& pos,
 191                               const wxSize& size,
 192                               long style,
 193                               const wxString& name)
 194 {
 195     m_needParent = true;
 196     m_acceptsFocus = true;
 197
 198     if (!PreCreation( parent, pos, size ) ||
 199         !base_type::CreateBase(parent, id, pos, size, style & wxWINDOW_STYLE_MASK,
 200                                wxDefaultValidator, name))
 201     {
 202         wxFAIL_MSG( wxT("wxAnimationCtrl creation failed") );
 203         return false;
 204     }
 205
 206     SetWindowStyle(style);
 207
 208     m_widget = gtk_image_new();
 209     gtk_widget_show( GTK_WIDGET(m_widget) );
 210
 211     m_parent->DoAddChild( this );
 212
 213     PostCreation(size);
 214     SetInitialSize(size);
 215
 216     if (anim.IsOk())
 217         SetAnimation(anim);
 218
 219     // init the timer used for animation
 220     m_timer.SetOwner(this);
 221
 222     return true;
 223 }
 224
 225 wxAnimationCtrl::~wxAnimationCtrl()
 226 {
 227     ResetAnim();
 228     ResetIter();
 229 }
 230
 231 bool wxAnimationCtrl::LoadFile(const wxString &filename, wxAnimationType type)
 232 {
 233     wxAnimation anim;
 234     if (!anim.LoadFile(filename, type))
 235         return false;
 236
 237     SetAnimation(anim);
 238     return true;
 239 }
 240
 241 void wxAnimationCtrl::SetAnimation(const wxAnimation &anim)
 242 {
 243     if (IsPlaying())
 244         Stop();
 245
 246     ResetAnim();
 247     ResetIter();
 248
 249     // copy underlying GdkPixbuf object
 250     m_anim = anim.GetPixbuf();
 251
 252     // m_anim may be null in case wxNullAnimation has been passed
 253     if (m_anim)
 254     {
 255         // add a reference to the GdkPixbufAnimation
 256         g_object_ref(m_anim);
 257
 258         if (!this->HasFlag(wxAC_NO_AUTORESIZE))
 259             FitToAnimation();
 260     }
 261
 262     DisplayStaticImage();
 263 }
 264
 265 void wxAnimationCtrl::FitToAnimation()
 266 {
 267     if (!m_anim)
 268         return;
 269
 270     int w = gdk_pixbuf_animation_get_width(m_anim),
 271         h = gdk_pixbuf_animation_get_height(m_anim);
 272
 273     // update our size to fit animation
 274         SetSize(w, h);
 275 }
 276
 277 void wxAnimationCtrl::ResetAnim()
 278 {
 279     if (m_anim)
 280         g_object_unref(m_anim);
 281     m_anim = NULL;
 282 }
 283
 284 void wxAnimationCtrl::ResetIter()
 285 {
 286     if (m_iter)
 287         g_object_unref(m_iter);
 288     m_iter = NULL;
 289 }
 290
 291 bool wxAnimationCtrl::Play()
 292 {
 293     if (m_anim == NULL)
 294         return false;
 295
 296     // init the iterator and start a one-shot timer
 297     ResetIter();
 298     m_iter = gdk_pixbuf_animation_get_iter (m_anim, NULL);
 299     m_bPlaying = true;
 300
 301     // gdk_pixbuf_animation_iter_get_delay_time() may return -1 which means
 302     // that the timer should not start
 303     int n = gdk_pixbuf_animation_iter_get_delay_time(m_iter);
 304     if (n >= 0)
 305         m_timer.Start(n, true);
 306
 307     return true;
 308 }
 309
 310 void wxAnimationCtrl::Stop()
 311 {
 312     // leave current frame displayed until Play() is called again
 313     if (IsPlaying())
 314         m_timer.Stop();
 315     m_bPlaying = false;
 316
 317     ResetIter();
 318     DisplayStaticImage();
 319 }
 320
 321 void wxAnimationCtrl::SetInactiveBitmap(const wxBitmap &bmp)
 322 {
 323     wxAnimationCtrlBase::SetInactiveBitmap(bmp);
 324
 325     // update the pixbuf associated with m_widget now...
 326     if (!IsPlaying())
 327         DisplayStaticImage();
 328 }
 329
 330 void wxAnimationCtrl::DisplayStaticImage()
 331 {
 332     wxASSERT(!IsPlaying());
 333
 334     if (m_bmpStatic.IsOk())
 335     {
 336         // show inactive bitmap
 337         GdkBitmap *mask = (GdkBitmap *) NULL;
 338         if (m_bmpStatic.GetMask())
 339             mask = m_bmpStatic.GetMask()->GetBitmap();
 340
 341         if (m_bmpStatic.HasPixbuf())
 342         {
 343             gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget),
 344                                         m_bmpStatic.GetPixbuf());
 345         }
 346         else
 347         {
 348             gtk_image_set_from_pixmap(GTK_IMAGE(m_widget),
 349                                         m_bmpStatic.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     ClearToBackgroundColour();
 412     return true;
 413 }
 414
 415
 416 //-----------------------------------------------------------------------------
 417 // wxAnimationCtrl - event handlers
 418 //-----------------------------------------------------------------------------
 419
 420 void wxAnimationCtrl::OnTimer(wxTimerEvent &ev)
 421 {
 422     wxASSERT(m_iter != NULL);
 423
 424     // gdk_pixbuf_animation_iter_advance() will automatically restart
 425     // the animation, if necessary and we have no way to know !!
 426     if (gdk_pixbuf_animation_iter_advance(m_iter, NULL))
 427     {
 428         // start a new one-shot timer
 429         int n = gdk_pixbuf_animation_iter_get_delay_time(m_iter);
 430         if (n >= 0)
 431             m_timer.Start(n, true);
 432
 433         gtk_image_set_from_pixbuf(GTK_IMAGE(m_widget),
 434                                   gdk_pixbuf_animation_iter_get_pixbuf(m_iter));
 435     }
 436     else
 437     {
 438         // no need to update the m_widget yet
 439         m_timer.Start(10, true);
 440     }
 441 }
 442
 443 #endif      // wxUSE_ANIMATIONCTRL