Remove commented code
Remove unused variable: framesOriginalPosition
cleanup
minor
minor
Add 'm_' Prefix to member variable
Create a new unit test: TestLayer
Add virtual keyword to virtual function
Fix wrong include file
Fix bug of LayerImage::getMaxFramePosition(), remove duplicated method LayerImage::getMaxFrameIndex(), add responded unit test
Merge branch 'refactor/layer-manager' of https://github.com/chchwy/pencil2d into refactor/layer-manager
Remove unused method LayerImage::getImageAtIndex()
Unit test of LayerImage::hasKeyFrameAtPosition()
Remove unused API LayerImage::getImageAtFrame()
UnitTest: LayerImage::GetFramePositionAt(), not finish yet
format
remove commented code
UnitTest: LayerImage::getFramePositionAt()
Make virtual functions pure.
UnitTest: LayerImage::removeImageAtFrame()