Strange drag-drop when opening an image from the shader editor and the open dialog is in thumbnail mode #67756

System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.35

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-26 15:34, hash: 79ce2054d4
Worked: (optional)

Short description of error
Blender starts a drag-drop-operation in the "open file"-dialog when I want to open a texture in an Image node in the Shader Editor

Exact steps for others to reproduce the error
Create a shader and an image node. Click "Open Image". Go to a directory with many textures and go to "Thumbnail mode". It's easiest to reproduce if the thumbnails completely fill up the window. Open one of the images. Now click open again, and if the open button in the image node is at the same place as a thumbnail in the open dialog then it will start a drag-drop-action immediately.

Added subscriber: @erik85

#68362 was marked as duplicate of this issue

#69094 was marked as duplicate of this issue

Added subscriber: @SpectreFirst

I have to say it's a very annoying bug, especially when you have to change textures a lot.

I found that there is a way to avoid it when clicking "Open Image". If you left-click and hold the button, then right-click and hold, then release left and release right.. If that helps in any way to find the problem.

Added subscribers: @ideasman42, @mano-wii

@ideasman42, have you worked on drag drop event checks recently?
I suspect the problem is in wm_handlers_do(...) that doesn't uncheck event->check_drag in this case.

Added subscriber: @Dalkoom

To avoid dragging move the mouse immediately after clicking Open Image.

Added subscriber: @crantisz

I think this bug should be closed, due new file browser?

Added subscriber: @sebastian_k

No, it still happens.
If you render something Blender will now by default open the render result in a new window. If you change from Render Result to any other image in that window, and change the filepath of that image from the N-Panel, the file browser will now open in the same window. And if the file browser is in thumbnail view, the drag/drop thing still happens.
So even though it might not be as obvious as before, the bug is still there.

Added subscriber: @AFWS

I only had this happen with nodes ,but after the “new” file browser got added, I’m getting this while trying to install matcaps.

This issue was referenced by e7476b667e

Changed status from 'Open' to: 'Resolved'

Added subscriber: @hfilben

Added subscriber: @Archost

Added subscriber: @JulianEisel

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Strange drag-drop when opening an image from the shader editor and the open dialog is in thumbnail mode #67756