I have to HOLD click when dragging an item across my inventory

I was playing Minecraft, and I was gonna pick up a hopper from the creative inventory, but I had to HOLD click to drag it to my inventory. It was tiring to my fingers! I also had to hold click to place items in different spaces, making crafting really hard to do. It started in creative, and it also happened in survival. On my other computer, it wasn't like that. Please help!