On 2020-08-22 15:53, josephenry via gtkmm-list wrote:
Hi,
I am learning Gtk+ with gtkmm and my goal is to create a node based
interface for visual programming. I started a thread on the Gnome
discourse :
https://discourse.gnome.org/t/project-guidance-node-based-ui/
<https://discourse.gnome.org/t/project-guidance-node-based-ui/4019>
Basically what I want is to have my custom node widgets on a "canvas"
so I can be able to move them by dragging them. If anyone knows
Blender's node editor, it should also be possible to pan with middle
mouse button and also zoom.
The Gtk::Layout component seems the right one when it comes to put
nodes at specific location on the interface. I also want to draw a
custom grid so this so the documentation seems adapted :
/
/
/Infinite scrollable area containing child widgets and/or custom drawing./
Now the "infinite scrollable area" concept interest me because I want
to be able to move on the node tree. The documentation says that I can
just put the layout into a Gtk::ScrolledWindow and it supports
scrolling natively.
Most of the documentation in gtkmm has been copied from GTK (formerly
GTK+). The description of Gtk::Layout is more or less a copy of the
documentation of GtkLayout. I don't understand why it's said that the
scrollable area is infinite. As far as I know all widgets have finite
size. The size can be large, much larger than a normal screen, but not
infinite. I think you'd better ask the GTK people. They don't use gnome
mailing lists any more. Their discussions have moved to discourse.gnome.org.
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