Drag and Drop Child (how to set different images for hover, etc?)

[MoonByte]

I was following this tutorial on how to make a simple Drag and Drop. Which works.
He linked to the Documentation for it which explains a bunch of things real nicely as well.
But I am afraid, my non-programmer card is showing cause I have no clue how to change the image of my dragable based on it's state.
The wiki says this:

A Drag has one child. The child's state reflects the status of the drag and drop operation:

• selected_hover - when it is being dragged.
• selected_idle - when it can be dropped on.
• hover - when the draggable will be dragged when the mouse is clicked.
• idle - otherwise.

What I understand from that is that there's four default images I can set:

• the object when it's untouched (idle)
• the object when the mouse is hovering over it aka it shows it can be picked up (hover)
• the object while actively being held (selected_hover)
• the object when it is being held over a droppable (selected_idle)

All cool and nice, but the embarrassing part is that I have no idea how to simply define each of them and the Wiki's examples all don't use any of them.
Based on the video tutorial I have this code:

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drag:
            drag_name "shirt"
            child "Shirt.jpg"
            xpos 100
            ypos 100
            draggable True
            droppable False
            dragged drag_placed
            drag_raise True

I have now tried a variety of things, among them

Code: Select all

child auto "Shirt_%s.jpg"

and

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child
	hover "Shirt_hover.jpg"
	idle "Shirt_idle.jpg"

They all spit out errors for either indentation or "expected a keyword or end of line".
I used the search function on the Wiki for "child" which brought me to the ATL page which kept mentioning child, so I thought that maybe I can simply put

Code: Select all

image auto "Shirt_%s.jpg"

and call it a day, but it complains that it needs a statement.

Code: Select all

child auto "Shirt_%s.jpg"

straight up says it can't find image "Shirt_%s.jpg", clearly ignoring the 'auto' function.

Can anyone give me the short and easy on how to tell Renpy which image file to look at for what state?