Add graph view

Client/Browser.py

@@ -13,6 +13,7 @@ import flet as ft
 from App import App
 from Core import ChipButtonStyle, FileIcons, HumanSize, OpenExternally, Palette
 from Sources import BaseName, Entry, JoinPath, MoveDestination, ParentPath, SourceError
+from Graph import GraphView
 from Viewer import FileView
 
 DoubleClickWindow = 0.4  # seconds
@@ -41,6 +42,7 @@ class Browser(ft.Column):
         self.BackStack: list[tuple[Optional[str], str]] = []
         self.ForwardStack: list[tuple[Optional[str], str]] = []
         self.OpenView: Optional[FileView] = None
+        self.GraphView: Optional[GraphView] = None
         self.ShortcutsPaused = False  # a text field has focus
         self.LastClickName: Optional[str] = None
         self.LastClickTime = 0.0
@@ -71,6 +73,8 @@ class Browser(ft.Column):
                 self.NewFileButton,
                 self.NewDirectoryButton,
                 self.UploadButton,
+                ft.IconButton(icon=ft.Icons.HUB_OUTLINED, icon_color=Palette.Mauve, tooltip="Graph (Ctrl+G)",
+                              on_click=lambda e: self.ShowGraph()),
                 ft.IconButton(icon=ft.Icons.REFRESH, icon_color=Palette.Mauve, tooltip="Refresh (Ctrl+R)",
                               on_click=lambda e: self.Refresh()),
                 self.ConnectionButton,
@@ -168,6 +172,7 @@ class Browser(ft.Column):
         self.Root, self.Path = Root, RelativePath
         self.SelectedName = None
         self.OpenView = None
+        self.GraphView = None
         self.ShortcutsPaused = False
         self._LoadEntries()
         self._ShowList()
@@ -194,6 +199,9 @@ class Browser(ft.Column):
     def Refresh(self) -> None:
         if self.OpenView is not None:
             return  # reloading would throw away edits; close the file first
+        if self.GraphView is not None:
+            self.GraphView.Reload()
+            return
         self._LoadEntries()
         self._ShowList()
 
@@ -358,6 +366,33 @@ class Browser(ft.Column):
                 self.EntryRows[RowName].update()
         self.SelectedName = Name
 
+    def ShowGraph(self) -> None:
+        """The graph of the root being browsed, in place of the file list."""
+        if self.OpenView is not None:
+            self.OpenView.RequestClose(Then=self.ShowGraph)
+            return
+        Root = self.Root
+        if Root is None:
+            Roots = self._Roots()
+            if not Roots:
+                return
+            Root = Roots[0]
+        self.GraphView = GraphView(self.TheApp, Root, self.Path if Root == self.Root else "",
+                                   OnOpenNode=lambda Node: self._OpenGraphNode(Root, Node), OnClose=self.CloseGraph)
+        self.FileArea.content = self.GraphView
+        self.FileArea.update()
+
+    def CloseGraph(self) -> None:
+        self.GraphView = None
+        self._ShowList()
+
+    def _OpenGraphNode(self, Root: str, Node: dict) -> None:
+        if Node["IsDirectory"]:
+            self.NavigateTo(Root, Node["Id"])
+        else:
+            self.GraphView = None
+            self.OpenFile(Root, Node["Id"])
+
     def OpenFile(self, Root: str, RelativePath: str) -> None:
         """Opens a file from anywhere (the sidebar tree): goes to its directory
         first, so Back and Esc land in the list it's in."""
@@ -626,6 +661,12 @@ class Browser(ft.Column):
             if not View.HandleEscape():
                 View.RequestClose()
             return
+        if Event.key == "Escape" and self.GraphView is not None:
+            self.CloseGraph()
+            return
+        if Event.key == "G" and Event.ctrl and not self.ShortcutsPaused:
+            self.CloseGraph() if self.GraphView is not None else self.ShowGraph()
+            return
         if self.ShortcutsPaused:
             return