Display toast when seed already exists

Fixes / required changes:
* Issue #585

src/seedsigner/gui/toast.py

@@ -123,6 +123,7 @@ def toggle_renderer_lock(self):
  def run(self):
  logger.info(f"{self.__class__.__name__}: started")
  start = time.time()
+ time.sleep(0.1)
  while time.time() - start < self.activation_delay:
  if self.hw_inputs.has_any_input():
  # User has pressed a button, cancel the toast
@@ -230,3 +231,22 @@ def instantiate_toast(self) -> ToastOverlay:
  icon_name=SeedSignerIconConstants.MICROSD,
  label_text=self.message,
  )
+
+class AlreadyLoadedSeedToastManagerThread(BaseToastOverlayManagerThread):
+ def __init__(self, activation_delay=0):
+ # Note: activation_delay is configurable so the screenshot generator can get the
+ # toast to immediately render.
+ super().__init__(
+ activation_delay=activation_delay, # seconds
+ duration=5, # seconds
+ )
+
+
+ def instantiate_toast(self) -> ToastOverlay:
+ return ToastOverlay(
+ icon_name=SeedSignerIconConstants.WARNING,
+ label_text="Seed already in memory",
+ font_size=GUIConstants.BODY_FONT_SIZE,
+ height=GUIConstants.BODY_FONT_SIZE * 2 + GUIConstants.BODY_LINE_SPACING + GUIConstants.EDGE_PADDING,
+ color=GUIConstants.INFO_COLOR,
+ )

src/seedsigner/models/seed_storage.py

@@ -31,6 +31,9 @@ def finalize_pending_seed(self) -> int:
  return index
 
 
+ def pending_seed_is_loaded(self) -> bool:
+ return self.pending_seed in self.seeds
+
  def clear_pending_seed(self):
  self.pending_seed = None
 

src/seedsigner/views/seed_views.py

@@ -15,6 +15,7 @@
 from seedsigner.gui.screens import (RET_CODE__BACK_BUTTON, ButtonListScreen,
  WarningScreen, DireWarningScreen, seed_screens)
 from seedsigner.gui.screens.screen import LargeIconStatusScreen, QRDisplayScreen
+from seedsigner.gui.toast import AlreadyLoadedSeedToastManagerThread
 from seedsigner.helpers import embit_utils
 from seedsigner.models.decode_qr import DecodeQR
 from seedsigner.models.encode_qr import CompactSeedQrEncoder, GenericStaticQrEncoder, SeedQrEncoder, SpecterXPubQrEncoder, StaticXpubQrEncoder, UrXpubQrEncoder
@@ -325,6 +326,8 @@ def run(self):
  )
 
  if button_data[selected_menu_num] == self.FINALIZE:
+ if self.controller.storage.pending_seed_is_loaded():
+ self.controller.activate_toast(AlreadyLoadedSeedToastManagerThread())
  seed_num = self.controller.storage.finalize_pending_seed()
  return Destination(SeedOptionsView, view_args={"seed_num": seed_num}, clear_history=True)
 
@@ -428,6 +431,8 @@ def run(self):
  return Destination(SeedAddPassphraseView)
 
  elif button_data[selected_menu_num] == self.DONE:
+ if self.controller.storage.pending_seed_is_loaded():
+ self.controller.activate_toast(AlreadyLoadedSeedToastManagerThread())
  seed_num = self.controller.storage.finalize_pending_seed()
  return Destination(SeedOptionsView, view_args={"seed_num": seed_num}, clear_history=True)
 

tests/screenshot_generator/generator.py

@@ -27,7 +27,7 @@
 
 from seedsigner.controller import Controller
 from seedsigner.gui.renderer import Renderer
-from seedsigner.gui.toast import BaseToastOverlayManagerThread, RemoveSDCardToastManagerThread, SDCardStateChangeToastManagerThread
+from seedsigner.gui.toast import BaseToastOverlayManagerThread, RemoveSDCardToastManagerThread, SDCardStateChangeToastManagerThread, AlreadyLoadedSeedToastManagerThread
 from seedsigner.hardware.microsd import MicroSD
 from seedsigner.models.decode_qr import DecodeQR
 from seedsigner.models.qr_type import QRType
@@ -180,6 +180,10 @@ def add_op_return_to_psbt(psbt: PSBT, raw_payload_data: bytes):
  seed_views.SeedReviewPassphraseView,
 
  (seed_views.SeedOptionsView, dict(seed_num=0)),
+
+ # Screenshot raises RuntimeError: threads can only be started once
+ # (seed_views.SeedOptionsView, dict(seed_num=0), "SeedOptionsView_AlreadyLoadedSeed", AlreadyLoadedSeedToastManagerThread(activation_delay=0)),
+
  (seed_views.SeedBackupView, dict(seed_num=0)),
  (seed_views.SeedExportXpubSigTypeView, dict(seed_num=0)),
  (seed_views.SeedExportXpubScriptTypeView, dict(seed_num=0, sig_type="msig")),