void UndoTransaction::removeFrameOfLayer(Layer* layer, int frame)
{
ASSERT(layer);
ASSERT(frame >= 0);
switch (layer->getType()) {
case GFXOBJ_LAYER_IMAGE:
if (Cel* cel = static_cast<LayerImage*>(layer)->getCel(frame))
removeCel(static_cast<LayerImage*>(layer), cel);
for (++frame; frame<m_sprite->getTotalFrames(); ++frame)
if (Cel* cel = static_cast<LayerImage*>(layer)->getCel(frame))
setCelFramePosition(cel, cel->getFrame()-1);
break;
case GFXOBJ_LAYER_FOLDER: {
LayerIterator it = static_cast<LayerFolder*>(layer)->get_layer_begin();
LayerIterator end = static_cast<LayerFolder*>(layer)->get_layer_end();
for (; it != end; ++it)
removeFrameOfLayer(*it, frame);
break;
}
}
}
// Does the hard part of removing a frame: Removes all cels located in
// the given frame, and moves all following cels one frame position back.
void DocumentApi::removeFrameOfLayer(Layer* layer, FrameNumber frame)
{
ASSERT(layer);
ASSERT(frame >= 0);
Sprite* sprite = layer->getSprite();
switch (layer->getType()) {
case GFXOBJ_LAYER_IMAGE:
if (Cel* cel = static_cast<LayerImage*>(layer)->getCel(frame))
removeCel(static_cast<LayerImage*>(layer), cel);
for (++frame; frame<sprite->getTotalFrames(); ++frame)
if (Cel* cel = static_cast<LayerImage*>(layer)->getCel(frame))
setCelFramePosition(sprite, cel, cel->getFrame().previous());
break;
case GFXOBJ_LAYER_FOLDER: {
LayerIterator it = static_cast<LayerFolder*>(layer)->getLayerBegin();
LayerIterator end = static_cast<LayerFolder*>(layer)->getLayerEnd();
for (; it != end; ++it)
removeFrameOfLayer(*it, frame);
break;
}
}
}
void UndoTransaction::removeFrame(int frame)
{
ASSERT(frame >= 0);
// Remove cels from this frame (and displace one position backward
// all next frames)
removeFrameOfLayer(m_sprite->getFolder(), frame);
// New value for totalFrames propety
int newTotalFrames = m_sprite->getTotalFrames()-1;
// Move backward if we will be outside the range of frames
if (m_sprite->getCurrentFrame() >= newTotalFrames)
setCurrentFrame(newTotalFrames-1);
// Decrement frames counter in the sprite
setNumberOfFrames(newTotalFrames);
}
void DocumentApi::removeFrame(Sprite* sprite, FrameNumber frame)
{
ASSERT(frame >= 0);
// Remove cels from this frame (and displace one position backward
// all next frames)
removeFrameOfLayer(sprite->getFolder(), frame);
// Add undoers to restore the removed frame from the sprite (to
// restore the number and durations of frames).
DocumentUndo* undo = m_document->getUndo();
if (undo->isEnabled())
m_undoers->pushUndoer(new undoers::RemoveFrame(getObjects(), m_document, sprite, frame));
// Remove the frame from the sprite. This is the low level
// operation, it modifies the number and duration of frames.
sprite->removeFrame(frame);
// Notify observers.
DocumentEvent ev(m_document);
ev.sprite(sprite);
ev.frame(frame);
m_document->notifyObservers<DocumentEvent&>(&DocumentObserver::onRemoveFrame, ev);
}
