Simple example browser

gui/browser.py

@@ -0,0 +1,180 @@
+#!/usr/bin/env python3
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU General Public License
+#  as published by the Free Software Foundation; either version 2
+#  of the License, or (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software Foundation,
+#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+import tkinter as tk
+
+class PathHandle:
+    """
+    Manage storing path, cache json.
+    """
+    __slots__ = (
+        "filepath",
+        "json",
+        "path",
+        )
+    def __init__(self):
+        self.json = None
+        # list of strings
+        self.path = []
+
+        self.filepath_set("gui.json")
+        self.refresh()
+
+    def refresh(self):
+        with open(self.filepath, 'r') as fp:
+            import json
+            self.json = json.load(fp)
+            print(self.json)
+
+    def filepath_set(self, filepath):
+        self.filepath = filepath
+
+    def append_path(self, path_item):
+        if path_item == "..":
+            # maybe we should raise error
+            if self.path:
+                self.path.pop()
+
+        else:
+            self.path.append(path_item)
+
+class Application(tk.Frame):
+    def __init__(self, root):
+
+        # local data
+        self.item_list = []
+
+        tk.Frame.__init__(self, root)
+
+        self.canvas = tk.Canvas(root, borderwidth=0, background="#d9d9d9")
+        self.frame = tk.Frame(self.canvas, background="#d9d9d9")
+        self.vsb = tk.Scrollbar(root, orient="vertical", command=self.canvas.yview)
+        self.canvas.configure(yscrollcommand=self.vsb.set)
+
+        self.vsb.pack(side="right", fill="y")
+        self.canvas.pack(side="left", fill="both", expand=True)
+        self.canvas.create_window((4, 4), window=self.frame, anchor="nw", 
+                                  tags="self.frame")
+
+        self.frame.bind("<Configure>", self.OnFrameConfigure)
+
+        self.path_handle = PathHandle()
+
+        self.grid_members = []
+
+        self.populate()
+
+
+    def populate(self):
+        '''Put in some fake data'''
+        pass
+        """
+        for row in range(100):
+            tk.Label(self.frame, text="%s" % row, width=3, borderwidth="1", 
+                     relief="solid").grid(row=row, column=0)
+            t="this is the second colum for row %s" %row
+            tk.Label(self.frame, text=t).grid(row=row, column=1)
+        """
+
+        def calc_label_text():
+            return "Path: " + "/".join(self.path_handle.path)
+
+        def exec_path_folder(idname, but_path):
+            self.path_handle.append_path(idname)
+            print(self.path_handle.path)
+
+            but_path.config(text=calc_label_text())
+            # but_path.labelText = calc_label_text()
+            # but_path.configure()
+
+            self.configure()
+            self.frame.configure()
+            self.update()
+            self.frame.update()
+            print(dir(self.frame))
+            # update!
+
+        def exec_path_file(idname):
+            # request the file?
+            for b in self.grid_members:
+                b.destroy()
+            self.grid_members.clear()
+            self.populate()
+
+
+
+        def _():
+            js = self.path_handle.json
+            items = js.get("items_list")
+            items.sort()
+            if items is None:
+                tk.Label(self, text="Empty")
+
+            but_path = tk.Label(self.frame, text=calc_label_text())
+            but_path.grid(row=0, column=1, sticky="nw")
+            self.grid_members.append(but_path)
+
+            row = 1
+            import random
+            random.shuffle(items)
+            for name_short, name_full, item_type in [("..", "", "folder")] + items:
+                print(name_short, name_full, item_type)
+                if item_type == "folder":
+                    but = tk.Label(self.frame, text="(/)", width=3, borderwidth="1", relief="solid")
+                    but.grid(row=row, column=0)
+                    self.grid_members.append(but)
+
+                    def fn(idname=name_short, but_path=but_path): exec_path_folder(idname, but_path)
+
+                    but = tk.Button(self.frame, text=name_short + "/", fg="green", command=fn)
+                    but.grid(row=row, column=1, sticky="nw")
+                    del fn
+
+                    self.grid_members.append(but)
+                    row += 1
+            del name_short, name_full, item_type
+            for name_short, name_full, item_type in items:
+                print(name_short, name_full, item_type)
+                if item_type == "file":
+                    but = tk.Label(self.frame, text="(f)", width=3, borderwidth="1", relief="solid")
+                    but.grid(row=row, column=0)
+                    def fn(idname=name_short): exec_path_file(idname)
+                    self.grid_members.append(but)
+
+
+                    but = tk.Button(self.frame, text=name_short, fg="blue", command=fn)
+                    but.grid(row=row, column=1, sticky="nw")
+                    del fn
+
+                    self.grid_members.append(but)
+                    row += 1
+            del name_short, name_full, item_type
+            # import IPython; IPython.embed()
+
+        _(); del _
+
+
+    def OnFrameConfigure(self, event):
+        '''Reset the scroll region to encompass the inner frame'''
+        self.canvas.configure(scrollregion=self.canvas.bbox("all"))
+
+root = tk.Tk()
+app = Application(root).pack(side="top", fill="both", expand=True)
+root.mainloop()
+