comment out hardcoded TESTARGS assignments, allowing "make test TESTARGS=--text-external-server"
fixes #2 on Gtk 3.4
redraw video widget on changing styles (Gtk3.4, fixes #16)
refactoring
refactoring
less debug messages
clarify error messages
GST_MESSAGE_TAG: ignore
hold a second longer of transition status
make it delay 300ms to release transition
optimizing PIP adjustment/changing mode
controlling composite mode switching speed to avoid UI blocking on handling pended messages
comment out unused code
fixes #9 by changing composite mode once a time from in the UI
increase acceptable change rate of modes
comment out some debug messages
remove event more debug messages
only lock changing-composite-mode on successful last change
turn on DUMP_DEBUG_MESSAGES_TO_FILES
add --print-debug-messages flag to test suite to allow switch on/off dumping debug messages into log files