Here a a few problems with the image docker (undock it to see the problems better)
a/ missing up/down arrow resizing cursor for top edge ( it may be a general problem in all dockers not specific to Krita)
b/ filenames don't scale horizontally, cf i/
c/ left arrow on the Browse tab means Back
d/ left arrow on the Images tab means Left
e/ missing tooltips
f/ right clicking samples the color on the displayed image but the cursor does not change to a sampling style cursor
g/ unable to open the displayed picture
h/ displayed picture on the bottom is grayed out instead of having a highlight frame around itself
i/ file view: doesnt scale well horizontally: the separator in the headers has the same color as the background, thus it is invisible. It basically one column, there should not be an empty second column.
j/ splitview: thumbnails are in one row, even if the splitter gives more space to the thumbnails widget.
k/ using sideways tab when docked. Please, don't use sideways tabs.
l/ mouse wheel event not implemented for the thumbnails view
Created attachment 82017 [details]
Image docker color picker patch
Displays a color picker when hover over the image in the docker
Created attachment 82018 [details]
Image docker scales horizontally to fit filenames
Created attachment 82019 [details]
Selected icon gets a green frame and resizing of icon area is better
Created attachment 82036 [details]
Use the theme highlight color instead of poison green
Git commit c2434f03d721df157de3d780d62709aac308b931 by Boudewijn Rempt.
Committed on 31/08/2013 at 07:25.
Pushed by rempt into branch 'master'.
Improvements to the Image docker
patches by Christer Stenbrenden (email@example.com)
* Displays a color picker when hover over the image in the docker
* Image docker scales horizontally to fit filenames
* Use the theme highlight color for selected icon
M +16 -1 krita/plugins/extensions/dockers/imagedocker/forms/wdgimagedocker.ui
M +15 -2 krita/plugins/extensions/dockers/imagedocker/imagedocker_dock.cpp
M +3 -0 krita/plugins/extensions/dockers/imagedocker/imagedocker_dock.h
M +4 -1 krita/plugins/extensions/dockers/imagedocker/kis_image_strip_scene.cpp
M +4 -0 krita/plugins/extensions/dockers/imagedocker/kis_image_view.cpp
My Wish/improvement about Image Reference Docker:
Zooming from a center of the docker's canvas. At present the docker zooms from the Top-left corner.
Three of these issues remain. Closing this bug, and creating individual tasks.