Stefan Klinger <fvwm....@stefan-klinger.de> writes: > Hi, > > I'm using darktable [1], an open-source photography workflow > application and raw developer, basically a free Adobe Lr alternative. > > Recently I noticed a bug: Darktable allows to select areas > (aka. shapes) on a photograph, and apply operations only to those > areas instead of to the whole image. Usually, one can drag these > shapes around with the mouse, holding down button 1. The bug > manifests when pressing button 1 on a shape: It jumps away (southeast) > from the pointer, maybe even outside of the window. It is not > possible to drag te shape to the top left area of the image. The > effect is larger to the lower right of the screen. > > I've filed a bug report [2] in darktable's tracker, and also > *temporarily* provide screencasts [3]. > > Pascal suggested that it's an issue with the window manager, which > would be FVWM on my machine. He cannot reproduce on Gnome. I've > tested the following: > > * The bug disappears when using Openbox instead of FVWM, and also > when not using any window manager at all (only X then). > > * I have (among others) this binding in my FVWM config > > mouse 1 A 4 moveOrRaise > > Disabling this makes the bug disappear, reenabling it produces the > bug again. This is demonstrated in the 3rd video [4]. > > * I have not seen this with any other application, so mabe it's > linked to a rather exotic/brand new feature not employed often by > X clients. > > Can anyone reproduce this? > ____________________ > [1] https://www.darktable.org/ > [2] https://redmine.darktable.org/issues/12387 > [3] https://depot.s5k6.net/B53pnjQAHxnTgvTw/ > [4] https://depot.s5k6.net/B53pnjQAHxnTgvTw/03-change_mouse_binding_hi.mp4
Nope, no luck reproducing it. Looks to me like Fvwm thinks your mouse 1 button has the Mod 4 modifier active. Have you done something to enable sticky modifier keys? You might want run "xev" and press mouse 1. -- Dan Espen
