How to use set_drag_drop_payload from Python?

[johnor]

First of all, thanks for a great library! I am currently porting an application and have a question on how to use set_drag_drop_payload with a payload from Python.

calling " imgui.set_drag_drop_payload("hello", "a", 1)" results in a TypeError:

TypeError: set_drag_drop_payload(): incompatible function arguments. The following argument types are supported:
1. (type: str, data: capsule, sz: int, cond: int = 0) -> bool

How can I create a capsule-object from a string or an integer?

[pthom]

First of all, thanks for a great library!

Thank you!

TypeError: set_drag_drop_payload(): incompatible function arguments. The following argument types are supported:

1. (type: str, data: capsule, sz: int, cond: int = 0) -> bool
   How can I create a capsule-object from a string or an integer?

I need to review the binding for this function, and this will require an adaptation to the code generator.

Its C++ signature is:

bool ImGui::SetDragDropPayload(const char* type, const void* data, size_t data_size, ImGuiCond cond)

Basically, I will need to wrap void * data into a py::object so that it accepts any python object. I'm looking at this now.

[johnor]

Great! Thanks for the quick response.

[pthom]

Ok, I added this commit: d53ae36

It adds support for Drag and Drop in python. Unfortunately it cannot support any kind of object but only integer values, as the C++ api is too low level (i.e it copies the raw object memory, which cannot be done in python).

If you want to transfer custom payload, you will have to pass id(your_payload) and store a reference to the paylod somewhere else.

See python demo code here

[pthom]

Note: I did not update the package on pypi. If you want to get this, you will need to install from source

[pthom]

Note: I did not update the package on pypi. If you want to get this, you will need to install from source.

I usually only update the pypi package once there is a sufficient set of modifications.