Comment 3 for bug 679994

I decided not to do the 'just click' method because it is already in the drag mode, so sometimes it may not be clearly distinguishable if the user just clicks or drags the images. I also first implemented just ctrl+click to both select and deselect images, but the problem is when the mouse is over multiple images and if some of them are already selected and the others are not, than the behavior of just toggling will probably not be desirable for the user.

Now that I thought of it more, maybe it will probably make more sense to have ctrl+click just mark the current images under the cursor and unmark all the others, while shift+ctrl+click add the images under the cursor and alt+ctrl+click remove the images from the cursor.

For the second thing, it seems reasonable, I will make it also work with the manual changes with apply button.

For the last idea, it is probably useful, but it requires additional effort in making this selection state global. Right now it is just a state for the fast preview part of the code, so I would mark this as a separate issue.