client: Rework select ui with header and centered scroll

playbook/templates/client.py

@@ -8,6 +8,8 @@ from time import sleep
 
 # Configuration
 
+text_album_current = "Aktuelles Album"
+text_album_root = "(Alle Fotoalben)"
 text_closed_pictures = "Gehe zurück ..."
 text_load_pictures = "Bilder werden geladen ..."
 text_no_pictures_found = "Hier sind leider noch keine Bilder drinnen."
@@ -56,12 +58,40 @@ def search_pictures(out, path):
     out(text_closed_pictures)
     return ret
 
+def draw_select(win, dirs, sel, y_offset = 0):
+    y_size, x_size = win.getmaxyx()
+    y_size -= y_offset
+    # centered scroll
+    y_center = y_size // 2
+    for y in range(y_size):
+        y_real = y + y_offset
+        i = sel + y - y_center
+        if i < 0 or len(dirs) <= i:
+            win.addstr(y_real, 1, " " * (x_size - 2), curses.A_NORMAL)
+        else:
+            text = " "
+            text += indicator if i == sel else (" " * len(indicator))
+            text += " "
+            text += dirs[i].name
+            text = stretch(text, x_size - 2)
+            text_format = curses.A_STANDOUT if i == sel else curses.A_NORMAL
+            win.addstr(y_real, 1, text, text_format)
+    return True
+
+def draw_header(win, base_dir, path):
+    x_size = win.getmaxyx()[1]
+    desc = build_description(base_dir, path)
+    text = text_album_current + ": "
+    text += desc if len(desc) > 0 else text_album_root
+    win.addstr(1, 1, stretch(text, x_size - 2))
+
 def show_select(win, base_dir, path):
     if not path.is_dir():
         raise Exception("'" + str(path) + "' is not a directory!")
     dirs = sorted([d for d in path.iterdir() if d.is_dir()])
     win.clear()
     if len(dirs) <= 0:
+        draw_header(win, base_dir, path)
         x_size = win.getmaxyx()[1]
         def out(text):
             win.addstr(3, 1, stretch(text, x_size - 2))
@@ -69,8 +99,8 @@ def show_select(win, base_dir, path):
         return search_pictures(out, path)
     sel = 0
     while True:
-        for y, d in enumerate(dirs):
-            win.addstr(y, 0, (indicator + " " if y == sel else "  ") + d.name + (" " * (curses.COLS - 2 - len(d.name))), curses.A_STANDOUT if y == sel else curses.A_NORMAL)
+        draw_header(win, base_dir, path)
+        draw_select(win, dirs, sel, y_offset=3)
         c = win.getch()
         if c in binding_up:
             sel = max(0, sel - 1)