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Florent D'Halluin authored
Handle transition creation in GScene (instead of GState). Add transition preview. * yavgui/src/Makefile.am: Add new files. * yavgui/src/g_scene.cc, * yavgui/src/g_scene.hh: Add implementation. * yavgui/src/g_state.cc, * yavgui/src/g_state.hh, * yavgui/src/g_state.hxx: Remove obsolete code, fix (de)selection. * yavgui/src/g_transition.cc, * yavgui/src/g_transition.hh, * yavgui/src/g_vcsn_handler_internal.hxx: Fix item (de)selection. * yavgui/src/g_transition_draft.cc, * yavgui/src/g_transition_draft.hh: New. Floating preview.
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