Spellstrike, Touch Spells, and Combat Maneuvers

Round 3: Revised Magus Discussion

I already posted this in the Rules board, but considering the Magus is still in playtest, I figured this might be a better place to ask my question.

While attempting to create a Magus build, I found a possible interaction between the Magus' Spellstrike ability and Combat Maneuvers delivered via weapons (such as tripping with a whip). For reference, here's the description of Spellstrike:
"Spellstrike (Su): At 2nd level, whenever a magus casts a spell with a range of “touch” from the magus spell list, he can deliver the spell through any weapon he is wielding as part of a melee attack. If successful, this melee attack deals its normal damage as well as the effects of the spell. Instead of the free melee touch attack normally allowed to deliver the spell, a magus can make one free melee attack with his weapon as part of casting this spell. If used with spell combat, this does not grant an additional attack."

My question is, can a Touch Spell be delivered via Spellstrike with a tripping weapon on a Trip Combat Maneuver? I have visions of casting Chill Touch, then simultaneously tripping enemies and hitting them with one of the Chill Touch charges to deal damage and Strength damage.

I don't have a problem with it, and would allow it(it's a great idea even, gives a reason to use those maneuvers), but it's not very clear and the key is defining what constitutes a Melee Attack.

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