First preliminary implementation of treeview resize

Works but only cover resize along x.

data/core/rootview.lua

@@ -108,8 +108,9 @@ function Node:split(dir, view, locked)
   end
   if dir == "up" or dir == "left" then
     self.a, self.b = self.b, self.a
+    return self.a
   end
-  return child
+  return self.b
 end
 
 
@@ -520,6 +521,13 @@ function RootView:on_mouse_moved(x, y, dx, dy)
   if self.dragged_divider then
     local node = self.dragged_divider
     if node.type == "hsplit" then
+      if node.a.resizable then
+        local size = node.a.active_view.size
+        size.x = size.x + dx
+      elseif node.b.resizable then
+        local size = node.b.active_view.size
+        size.x = size.x + dx
+      end
       node.divider = node.divider + dx / node.size.x
     else
       node.divider = node.divider + dy / node.size.y

data/plugins/treeview.lua

@@ -188,8 +188,6 @@ function TreeView:update()
   if self.init_size then
     self.size.x = dest
     self.init_size = false
-  else
-    self:move_towards(self.size, "x", dest)
   end
 
   TreeView.super.update(self)
@@ -251,7 +249,9 @@ end
 -- init
 local view = TreeView()
 local node = core.root_view:get_active_node()
-node:split("left", view, true)
+local treeview_node = node:split("left", view, true)
+treeview_node.resizable = true
+
 
 -- register commands and keymap
 command.add(nil, {