[Pinta.Resources] Use symbolic tool icons.

[jpobst]

Pinta's original icons don't work as well anymore in the era of dark themes and HiDPI screens.

Transitioning to symbolic SVG icons allow them to be displayed better at higher resolutions, and to be automatically colored to be viewable on dark themes. This updates the icons for Pinta's toolbox.

Unfortunately we don't have a contributing artist, so it's a combination of icons scavenged from appropriately licensed resources and programmer art!

[cameronwhite]

Nice! The new icons look pretty good to me
There were a few bugs on launchpad about this, so it's great to see this being worked on 👍

I'm planning to do a 2.0.1 release imminently for some of the regressions that have been fixed, so I'll wait until after to merge this

[lobre]

Hi, not sure if my problem is related to this PR, but commenting just in case.

I am running Pinta 2.0.2 installed with nixpkgs on Ubuntu 20.04. When I open it, I receive this exception.

Icon 'tool-move' not present in theme Adwaita

GLib.GException: Icon 'tool-move' not present in theme Adwaita
   at Gtk.IconTheme.LoadIcon(String icon_name, Int32 size, IconLookupFlags flags)
   at Pinta.Core.GtkExtensions.LoadIcon(IconTheme theme, String icon_name, Int32 size) in /build/source/Pinta.Core/Extensions/GtkExtensions.cs:line 181
   at Pinta.Tools.MoveSelectedTool.get_DefaultCursor() in /build/source/Pinta.Tools/Tools/MoveSelectedTool.cs:line 47
   at Pinta.Core.BaseTool..ctor(IServiceManager services) in /build/source/Pinta.Core/Classes/BaseTool.cs:line 58
   at Pinta.Tools.BaseTransformTool..ctor(IServiceManager services) in /build/source/Pinta.Tools/Tools/BaseTransformTool.cs:line 47
   at Pinta.Tools.MoveSelectedTool..ctor(IServiceManager services) in /build/source/Pinta.Tools/Tools/MoveSelectedTool.cs:line 39
   at Pinta.Tools.CoreToolsExtension.Initialize() in /build/source/Pinta.Tools/CoreToolsExtension.cs:line 52
   at Pinta.MainWindow.OnActivated() in /build/source/Pinta/MainWindow.cs:line 103
   at GLib.Application.Activated_cb(IntPtr inst)

This happens whatever the GTK theme.
Could this be related to the switch to SVG icons?

Thanks

[cameronwhite]

It should be unrelated since this PR wasn't in the 2.0.2 release
That sounds like a packaging or path issue , where it can't find Pinta's custom icons that are installed under <prefix>/share/icons/hicolor/...

[lobre]

Thanks for the hint @cameronwhite and sorry for the noise then.

[Imerion]

Could there perhaps be an option for choosing the old icons instead? I prefer the high-colored look and I feel it is easier to quickly find the correct one with a bit of color. If not, perhaps they could be made available as a plugin.

[N0rdmann]

+1 on Imerion's request
I regularly switch between paint.net and Pinta and would love to have back matching icons 🥰
would be nice if this can be somehow archived without recompiling etc.

[cameronwhite]

Pull requests are welcome for this - I'm mainly focused on the GTK4 port currently
It perhaps could be solved with changing the icon theme, but I'm not sure if it works to override symbolic icons with normal coloured icons