Intel Core i7, 8 Gb RAM, AMD Radeon HD 7700
Windows 7 x64
Intel Core Q6600, 8Gb RAM, NVidia GTX960
Windows 7 x64
Broken: latest 2.8 builds up to 957b4547aeeb
Worked: 2.79b and all previous versions
Short description of error
Currently it isn't possible to properly rotate or do any other viewport navigation with left mouse button while it's hovering over rotation or universal manipulator.
Exact steps for others to reproduce the error
- Start Blender, go to Preferences -> Keymap -> 3D View -> 3D View (Global) and set any combination of viewport controls with left mouse button in it. Just like most people I use Maya control scheme so you can assign Alt+Left for rotating, Alt+Right for scaling and Alt+Middle for panning.
- Select default Cube, Enable Rotate or Transform (universal) manipulator, hover your mouse over it and try to perform an operation (in my case rotation) with Alt+Left mouse button.
- In 2.79b you will be able to rotate properly without any problems.
- In 2.8 it will perform dragging or rotating or something else, in another words, it will activate the manipulator instead of activating viewport operation. The same thing doesn't happen with right and middle mouse buttons (you will be able to scale and pan with your right and middle mouse over manipulator but not with left mouse).
There is also a similar problem with assigning left mouse button to perform dragging for rectangular selection but I've heard there was some kind of workaround by sacrificing something called "3D View Tool Transform from Gizmo" and all 3D View Tool (Move, Rotate, Scale) tweaking functionality. It seems like you have to sacrifice a lot of tools just to restore essential basic functionality so I don't think it's a good solution to leave it like that.
I'm aware that there was a topic somewhere about substituting Alt+Left Mouse with Middle Mouse somehow but that will mean we'll have to sacrifice even more shortcuts and functions just to be able to do basic things. I have tried to find a workaround by disabling almost everything associated with Alt+Left Mouse button but it just doesn't seem to work.
Overall I'm not sure if this is a bug or not but it feels that something is seriously wrong with most of the functions associated with left mouse so it definitely requires attention.