wx.lib.agw.aui may not be able to dock pane next to a notebook

[tianzhuqiao]

Operating system: MacOS 13.2.1
wxPython version & source: 4.2.0
Python version & source: 3.9.5

Description of the problem:
Sometime, it may not be able to dock a pane next to a notebook.

The problem is when calling DoDropFloatingPane, if the index of the notebook page in panes is smaller than the notebook, PaneHitTest will return the notebook page, and its dock info (e.g., dock_direction) is not correct to dock the pane.

def DoDropFloatingPane(self, docks, panes, target, pt):
        ...
        screenPt = self._frame.ClientToScreen(pt)
        paneInfo = self.PaneHitTest(panes, pt)
        ...
        for i in range(len(self._guides) - 1, -1, -1):
            ...

            if dir == wx.ALL:  # target is a single dock guide
                return self.DoDropLayer(docks, target, guide.dock_direction)

            elif dir == wx.CENTER:
                ...
            else:

                drop_pane = False
                drop_row = False

                # if the paneInfo is a notebook page, the following info may not be correct
                insert_dir = paneInfo.dock_direction
                insert_layer = paneInfo.dock_layer
                insert_row = paneInfo.dock_row
                insert_pos = paneInfo.dock_pos
    ...

Looks like if we use the notebook pane (instead of the notebook page pane), the problem goes away.

def DoDropFloatingPane(self, docks, panes, target, pt):
        ...
        for i in range(len(self._guides) - 1, -1, -1):
            ...

            if dir == wx.ALL:  # target is a single dock guide
                return self.DoDropLayer(docks, target, guide.dock_direction)

            elif dir == wx.CENTER:
                ...
            else:

                drop_pane = False
                drop_row = False

                if paneInfo.IsNotebookPage():
                     # use the notebook where paneInfo is in
                     paneInfo = GetNotebookRoot(panes, paneInfo.notebook_id)

                # if the paneInfo is a notebook page, the following info may not be correct
                insert_dir = paneInfo.dock_direction
                insert_layer = paneInfo.dock_layer
                insert_row = paneInfo.dock_row
                insert_pos = paneInfo.dock_pos
    ...