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electrum/electrum/gui/qt/util.py

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import asyncio
import os.path
import time
import sys
import platform
import queue
import traceback
import os
import webbrowser
from decimal import Decimal
from functools import partial, lru_cache
from typing import (NamedTuple, Callable, Optional, TYPE_CHECKING, Union, List, Dict, Any,
Sequence, Iterable)
from PyQt5.QtGui import (QFont, QColor, QCursor, QPixmap, QStandardItem,
QPalette, QIcon, QFontMetrics, QShowEvent, QPainter, QHelpEvent)
from PyQt5.QtCore import (Qt, QPersistentModelIndex, QModelIndex, pyqtSignal,
QCoreApplication, QItemSelectionModel, QThread,
QSortFilterProxyModel, QSize, QLocale, QAbstractItemModel,
QEvent)
from PyQt5.QtWidgets import (QPushButton, QLabel, QMessageBox, QHBoxLayout,
QAbstractItemView, QVBoxLayout, QLineEdit,
QStyle, QDialog, QGroupBox, QButtonGroup, QRadioButton,
QFileDialog, QWidget, QToolButton, QTreeView, QPlainTextEdit,
QHeaderView, QApplication, QToolTip, QTreeWidget, QStyledItemDelegate,
QMenu, QStyleOptionViewItem)
from electrum.i18n import _, languages
from electrum.util import FileImportFailed, FileExportFailed, make_aiohttp_session, resource_path
from electrum.invoices import PR_UNPAID, PR_PAID, PR_EXPIRED, PR_INFLIGHT, PR_UNKNOWN, PR_FAILED, PR_ROUTING, PR_UNCONFIRMED
if TYPE_CHECKING:
from .main_window import ElectrumWindow
from .installwizard import InstallWizard
from electrum.simple_config import SimpleConfig
if platform.system() == 'Windows':
MONOSPACE_FONT = 'Lucida Console'
elif platform.system() == 'Darwin':
MONOSPACE_FONT = 'Monaco'
else:
MONOSPACE_FONT = 'monospace'
dialogs = []
pr_icons = {
PR_UNKNOWN:"warning.png",
PR_UNPAID:"unpaid.png",
PR_PAID:"confirmed.png",
PR_EXPIRED:"expired.png",
PR_INFLIGHT:"unconfirmed.png",
PR_FAILED:"warning.png",
PR_ROUTING:"unconfirmed.png",
PR_UNCONFIRMED:"unconfirmed.png",
}
# filter tx files in QFileDialog:
TRANSACTION_FILE_EXTENSION_FILTER_ANY = "Transaction (*.txn *.psbt);;All files (*)"
TRANSACTION_FILE_EXTENSION_FILTER_ONLY_PARTIAL_TX = "Partial Transaction (*.psbt)"
TRANSACTION_FILE_EXTENSION_FILTER_ONLY_COMPLETE_TX = "Complete Transaction (*.txn)"
TRANSACTION_FILE_EXTENSION_FILTER_SEPARATE = (f"{TRANSACTION_FILE_EXTENSION_FILTER_ONLY_PARTIAL_TX};;"
f"{TRANSACTION_FILE_EXTENSION_FILTER_ONLY_COMPLETE_TX};;"
f"All files (*)")
class EnterButton(QPushButton):
def __init__(self, text, func):
QPushButton.__init__(self, text)
self.func = func
self.clicked.connect(func)
def keyPressEvent(self, e):
if e.key() in [Qt.Key_Return, Qt.Key_Enter]:
self.func()
class ThreadedButton(QPushButton):
def __init__(self, text, task, on_success=None, on_error=None):
QPushButton.__init__(self, text)
self.task = task
self.on_success = on_success
self.on_error = on_error
self.clicked.connect(self.run_task)
def run_task(self):
self.setEnabled(False)
self.thread = TaskThread(self)
self.thread.add(self.task, self.on_success, self.done, self.on_error)
def done(self):
self.setEnabled(True)
self.thread.stop()
class WWLabel(QLabel):
def __init__ (self, text="", parent=None):
QLabel.__init__(self, text, parent)
self.setWordWrap(True)
self.setTextInteractionFlags(Qt.TextSelectableByMouse)
class HelpLabel(QLabel):
def __init__(self, text, help_text):
QLabel.__init__(self, text)
self.help_text = help_text
self.app = QCoreApplication.instance()
self.font = QFont()
def mouseReleaseEvent(self, x):
custom_message_box(icon=QMessageBox.Information,
parent=self,
title=_('Help'),
text=self.help_text)
def enterEvent(self, event):
self.font.setUnderline(True)
self.setFont(self.font)
self.app.setOverrideCursor(QCursor(Qt.PointingHandCursor))
return QLabel.enterEvent(self, event)
def leaveEvent(self, event):
self.font.setUnderline(False)
self.setFont(self.font)
self.app.setOverrideCursor(QCursor(Qt.ArrowCursor))
return QLabel.leaveEvent(self, event)
class HelpButton(QToolButton):
def __init__(self, text):
QToolButton.__init__(self)
self.setText('?')
self.help_text = text
self.setFocusPolicy(Qt.NoFocus)
self.setFixedWidth(round(2.2 * char_width_in_lineedit()))
self.clicked.connect(self.onclick)
def onclick(self):
custom_message_box(icon=QMessageBox.Information,
parent=self,
title=_('Help'),
text=self.help_text,
rich_text=True)
class InfoButton(QPushButton):
def __init__(self, text):
QPushButton.__init__(self, 'Info')
self.help_text = text
self.setFocusPolicy(Qt.NoFocus)
self.setFixedWidth(6 * char_width_in_lineedit())
self.clicked.connect(self.onclick)
def onclick(self):
custom_message_box(icon=QMessageBox.Information,
parent=self,
title=_('Info'),
text=self.help_text,
rich_text=True)
class Buttons(QHBoxLayout):
def __init__(self, *buttons):
QHBoxLayout.__init__(self)
self.addStretch(1)
for b in buttons:
if b is None:
continue
self.addWidget(b)
class CloseButton(QPushButton):
def __init__(self, dialog):
QPushButton.__init__(self, _("Close"))
self.clicked.connect(dialog.close)
self.setDefault(True)
class CopyButton(QPushButton):
def __init__(self, text_getter, app):
QPushButton.__init__(self, _("Copy"))
self.clicked.connect(lambda: app.clipboard().setText(text_getter()))
class CopyCloseButton(QPushButton):
def __init__(self, text_getter, app, dialog):
QPushButton.__init__(self, _("Copy and Close"))
self.clicked.connect(lambda: app.clipboard().setText(text_getter()))
self.clicked.connect(dialog.close)
self.setDefault(True)
class OkButton(QPushButton):
def __init__(self, dialog, label=None):
QPushButton.__init__(self, label or _("OK"))
self.clicked.connect(dialog.accept)
self.setDefault(True)
class CancelButton(QPushButton):
def __init__(self, dialog, label=None):
QPushButton.__init__(self, label or _("Cancel"))
self.clicked.connect(dialog.reject)
class MessageBoxMixin(object):
def top_level_window_recurse(self, window=None, test_func=None):
window = window or self
classes = (WindowModalDialog, QMessageBox)
if test_func is None:
test_func = lambda x: True
for n, child in enumerate(window.children()):
# Test for visibility as old closed dialogs may not be GC-ed.
# Only accept children that confirm to test_func.
if isinstance(child, classes) and child.isVisible() \
and test_func(child):
return self.top_level_window_recurse(child, test_func=test_func)
return window
def top_level_window(self, test_func=None):
return self.top_level_window_recurse(test_func)
def question(self, msg, parent=None, title=None, icon=None, **kwargs) -> bool:
Yes, No = QMessageBox.Yes, QMessageBox.No
return Yes == self.msg_box(icon=icon or QMessageBox.Question,
parent=parent,
title=title or '',
text=msg,
buttons=Yes|No,
defaultButton=No,
**kwargs)
def show_warning(self, msg, parent=None, title=None, **kwargs):
return self.msg_box(QMessageBox.Warning, parent,
title or _('Warning'), msg, **kwargs)
def show_error(self, msg, parent=None, **kwargs):
return self.msg_box(QMessageBox.Warning, parent,
_('Error'), msg, **kwargs)
def show_critical(self, msg, parent=None, title=None, **kwargs):
return self.msg_box(QMessageBox.Critical, parent,
title or _('Critical Error'), msg, **kwargs)
def show_message(self, msg, parent=None, title=None, **kwargs):
return self.msg_box(QMessageBox.Information, parent,
title or _('Information'), msg, **kwargs)
def msg_box(self, icon, parent, title, text, *, buttons=QMessageBox.Ok,
defaultButton=QMessageBox.NoButton, rich_text=False,
checkbox=None):
parent = parent or self.top_level_window()
return custom_message_box(icon=icon,
parent=parent,
title=title,
text=text,
buttons=buttons,
defaultButton=defaultButton,
rich_text=rich_text,
checkbox=checkbox)
def custom_message_box(*, icon, parent, title, text, buttons=QMessageBox.Ok,
defaultButton=QMessageBox.NoButton, rich_text=False,
checkbox=None):
if type(icon) is QPixmap:
d = QMessageBox(QMessageBox.Information, title, str(text), buttons, parent)
d.setIconPixmap(icon)
else:
d = QMessageBox(icon, title, str(text), buttons, parent)
d.setWindowModality(Qt.WindowModal)
d.setDefaultButton(defaultButton)
if rich_text:
d.setTextInteractionFlags(Qt.TextSelectableByMouse | Qt.LinksAccessibleByMouse)
# set AutoText instead of RichText
# AutoText lets Qt figure out whether to render as rich text.
# e.g. if text is actually plain text and uses "\n" newlines;
# and we set RichText here, newlines would be swallowed
d.setTextFormat(Qt.AutoText)
else:
d.setTextInteractionFlags(Qt.TextSelectableByMouse)
d.setTextFormat(Qt.PlainText)
if checkbox is not None:
d.setCheckBox(checkbox)
return d.exec_()
class WindowModalDialog(QDialog, MessageBoxMixin):
'''Handy wrapper; window modal dialogs are better for our multi-window
daemon model as other wallet windows can still be accessed.'''
def __init__(self, parent, title=None):
QDialog.__init__(self, parent)
self.setWindowModality(Qt.WindowModal)
if title:
self.setWindowTitle(title)
class WaitingDialog(WindowModalDialog):
'''Shows a please wait dialog whilst running a task. It is not
necessary to maintain a reference to this dialog.'''
def __init__(self, parent: QWidget, message: str, task, on_success=None, on_error=None):
assert parent
if isinstance(parent, MessageBoxMixin):
parent = parent.top_level_window()
WindowModalDialog.__init__(self, parent, _("Please wait"))
self.message_label = QLabel(message)
vbox = QVBoxLayout(self)
vbox.addWidget(self.message_label)
self.accepted.connect(self.on_accepted)
self.show()
self.thread = TaskThread(self)
self.thread.finished.connect(self.deleteLater) # see #3956
self.thread.add(task, on_success, self.accept, on_error)
def wait(self):
self.thread.wait()
def on_accepted(self):
self.thread.stop()
def update(self, msg):
print(msg)
self.message_label.setText(msg)
class BlockingWaitingDialog(WindowModalDialog):
"""Shows a waiting dialog whilst running a task.
Should be called from the GUI thread. The GUI thread will be blocked while
the task is running; the point of the dialog is to provide feedback
to the user regarding what is going on.
"""
def __init__(self, parent: QWidget, message: str, task: Callable[[], Any]):
assert parent
if isinstance(parent, MessageBoxMixin):
parent = parent.top_level_window()
WindowModalDialog.__init__(self, parent, _("Please wait"))
self.message_label = QLabel(message)
vbox = QVBoxLayout(self)
vbox.addWidget(self.message_label)
# show popup
self.show()
# refresh GUI; needed for popup to appear and for message_label to get drawn
QCoreApplication.processEvents()
QCoreApplication.processEvents()
# block and run given task
task()
# close popup
self.accept()
def line_dialog(parent, title, label, ok_label, default=None):
dialog = WindowModalDialog(parent, title)
dialog.setMinimumWidth(500)
l = QVBoxLayout()
dialog.setLayout(l)
l.addWidget(QLabel(label))
txt = QLineEdit()
if default:
txt.setText(default)
l.addWidget(txt)
l.addLayout(Buttons(CancelButton(dialog), OkButton(dialog, ok_label)))
if dialog.exec_():
return txt.text()
def text_dialog(
*,
parent,
title,
header_layout,
ok_label,
default=None,
allow_multi=False,
config: 'SimpleConfig',
):
from .qrtextedit import ScanQRTextEdit
dialog = WindowModalDialog(parent, title)
dialog.setMinimumWidth(600)
l = QVBoxLayout()
dialog.setLayout(l)
if isinstance(header_layout, str):
l.addWidget(QLabel(header_layout))
else:
l.addLayout(header_layout)
txt = ScanQRTextEdit(allow_multi=allow_multi, config=config)
if default:
txt.setText(default)
l.addWidget(txt)
l.addLayout(Buttons(CancelButton(dialog), OkButton(dialog, ok_label)))
if dialog.exec_():
return txt.toPlainText()
class ChoicesLayout(object):
def __init__(self, msg, choices, on_clicked=None, checked_index=0):
vbox = QVBoxLayout()
if len(msg) > 50:
vbox.addWidget(WWLabel(msg))
msg = ""
gb2 = QGroupBox(msg)
vbox.addWidget(gb2)
vbox2 = QVBoxLayout()
gb2.setLayout(vbox2)
self.group = group = QButtonGroup()
for i,c in enumerate(choices):
button = QRadioButton(gb2)
button.setText(c)
vbox2.addWidget(button)
group.addButton(button)
group.setId(button, i)
if i==checked_index:
button.setChecked(True)
if on_clicked:
group.buttonClicked.connect(partial(on_clicked, self))
self.vbox = vbox
def layout(self):
return self.vbox
def selected_index(self):
return self.group.checkedId()
def address_field(addresses):
hbox = QHBoxLayout()
address_e = QLineEdit()
if addresses and len(addresses) > 0:
address_e.setText(addresses[0])
else:
addresses = []
def func():
try:
i = addresses.index(str(address_e.text())) + 1
i = i % len(addresses)
address_e.setText(addresses[i])
except ValueError:
# the user might have changed address_e to an
# address not in the wallet (or to something that isn't an address)
if addresses and len(addresses) > 0:
address_e.setText(addresses[0])
button = QPushButton(_('Address'))
button.clicked.connect(func)
hbox.addWidget(button)
hbox.addWidget(address_e)
return hbox, address_e
def filename_field(parent, config, defaultname, select_msg):
vbox = QVBoxLayout()
vbox.addWidget(QLabel(_("Format")))
gb = QGroupBox("format", parent)
b1 = QRadioButton(gb)
b1.setText(_("CSV"))
b1.setChecked(True)
b2 = QRadioButton(gb)
b2.setText(_("json"))
vbox.addWidget(b1)
vbox.addWidget(b2)
hbox = QHBoxLayout()
directory = config.get('io_dir', os.path.expanduser('~'))
path = os.path.join(directory, defaultname)
filename_e = QLineEdit()
filename_e.setText(path)
def func():
text = filename_e.text()
_filter = "*.csv" if defaultname.endswith(".csv") else "*.json" if defaultname.endswith(".json") else None
p = getSaveFileName(
parent=None,
title=select_msg,
filename=text,
filter=_filter,
config=config,
)
if p:
filename_e.setText(p)
button = QPushButton(_('File'))
button.clicked.connect(func)
hbox.addWidget(button)
hbox.addWidget(filename_e)
vbox.addLayout(hbox)
def set_csv(v):
text = filename_e.text()
text = text.replace(".json",".csv") if v else text.replace(".csv",".json")
filename_e.setText(text)
b1.clicked.connect(lambda: set_csv(True))
b2.clicked.connect(lambda: set_csv(False))
return vbox, filename_e, b1
class ElectrumItemDelegate(QStyledItemDelegate):
def __init__(self, tv: 'MyTreeView'):
super().__init__(tv)
self.tv = tv
self.opened = None
def on_closeEditor(editor: QLineEdit, hint):
self.opened = None
self.tv.is_editor_open = False
if self.tv._pending_update:
self.tv.update()
def on_commitData(editor: QLineEdit):
new_text = editor.text()
idx = QModelIndex(self.opened)
row, col = idx.row(), idx.column()
_prior_text, user_role = self.tv.get_text_and_userrole_from_coordinate(row, col)
# check that we didn't forget to set UserRole on an editable field
assert user_role is not None, (row, col)
self.tv.on_edited(idx, user_role, new_text)
self.closeEditor.connect(on_closeEditor)
self.commitData.connect(on_commitData)
def createEditor(self, parent, option, idx):
self.opened = QPersistentModelIndex(idx)
self.tv.is_editor_open = True
return super().createEditor(parent, option, idx)
def paint(self, painter: QPainter, option: QStyleOptionViewItem, idx: QModelIndex) -> None:
custom_data = idx.data(MyTreeView.ROLE_CUSTOM_PAINT)
if custom_data is None:
return super().paint(painter, option, idx)
else:
# let's call the default paint method first; to paint the background (e.g. selection)
super().paint(painter, option, idx)
# and now paint on top of that
custom_data.paint(painter, option.rect)
def helpEvent(self, evt: QHelpEvent, view: QAbstractItemView, option: QStyleOptionViewItem, idx: QModelIndex) -> bool:
custom_data = idx.data(MyTreeView.ROLE_CUSTOM_PAINT)
if custom_data is None:
return super().helpEvent(evt, view, option, idx)
else:
if evt.type() == QEvent.ToolTip:
if custom_data.show_tooltip(evt):
return True
return super().helpEvent(evt, view, option, idx)
def sizeHint(self, option: QStyleOptionViewItem, idx: QModelIndex) -> QSize:
custom_data = idx.data(MyTreeView.ROLE_CUSTOM_PAINT)
if custom_data is None:
return super().sizeHint(option, idx)
else:
default_size = super().sizeHint(option, idx)
return custom_data.sizeHint(default_size)
class MyTreeView(QTreeView):
ROLE_CLIPBOARD_DATA = Qt.UserRole + 100
ROLE_CUSTOM_PAINT = Qt.UserRole + 101
filter_columns: Iterable[int]
def __init__(self, parent: 'ElectrumWindow', create_menu, *,
stretch_column=None, editable_columns=None):
super().__init__(parent)
self.parent = parent
self.config = self.parent.config
self.stretch_column = stretch_column
self.setContextMenuPolicy(Qt.CustomContextMenu)
self.customContextMenuRequested.connect(create_menu)
self.setUniformRowHeights(True)
# Control which columns are editable
if editable_columns is not None:
editable_columns = set(editable_columns)
elif stretch_column is not None:
editable_columns = {stretch_column}
else:
editable_columns = {}
self.editable_columns = editable_columns
self.setItemDelegate(ElectrumItemDelegate(self))
self.current_filter = ""
self.is_editor_open = False
self.setRootIsDecorated(False) # remove left margin
self.toolbar_shown = False
# When figuring out the size of columns, Qt by default looks at
# the first 1000 rows (at least if resize mode is QHeaderView.ResizeToContents).
# This would be REALLY SLOW, and it's not perfect anyway.
# So to speed the UI up considerably, set it to
# only look at as many rows as currently visible.
self.header().setResizeContentsPrecision(0)
self._pending_update = False
self._forced_update = False
def set_editability(self, items):
for idx, i in enumerate(items):
i.setEditable(idx in self.editable_columns)
def selected_in_column(self, column: int):
items = self.selectionModel().selectedIndexes()
return list(x for x in items if x.column() == column)
def current_item_user_role(self, col) -> Any:
idx = self.selectionModel().currentIndex()
idx = idx.sibling(idx.row(), col)
item = self.item_from_index(idx)
if item:
return item.data(Qt.UserRole)
def item_from_index(self, idx: QModelIndex) -> Optional[QStandardItem]:
model = self.model()
if isinstance(model, QSortFilterProxyModel):
idx = model.mapToSource(idx)
return model.sourceModel().itemFromIndex(idx)
else:
return model.itemFromIndex(idx)
def original_model(self) -> QAbstractItemModel:
model = self.model()
if isinstance(model, QSortFilterProxyModel):
return model.sourceModel()
else:
return model
def set_current_idx(self, set_current: QPersistentModelIndex):
if set_current:
assert isinstance(set_current, QPersistentModelIndex)
assert set_current.isValid()
self.selectionModel().select(QModelIndex(set_current), QItemSelectionModel.SelectCurrent)
def update_headers(self, headers: Union[List[str], Dict[int, str]]):
# headers is either a list of column names, or a dict: (col_idx->col_name)
if not isinstance(headers, dict): # convert to dict
headers = dict(enumerate(headers))
col_names = [headers[col_idx] for col_idx in sorted(headers.keys())]
self.original_model().setHorizontalHeaderLabels(col_names)
self.header().setStretchLastSection(False)
for col_idx in headers:
sm = QHeaderView.Stretch if col_idx == self.stretch_column else QHeaderView.ResizeToContents
self.header().setSectionResizeMode(col_idx, sm)
def keyPressEvent(self, event):
if self.itemDelegate().opened:
return
if event.key() in [Qt.Key_F2, Qt.Key_Return, Qt.Key_Enter]:
self.on_activated(self.selectionModel().currentIndex())
return
super().keyPressEvent(event)
def on_activated(self, idx):
# on 'enter' we show the menu
pt = self.visualRect(idx).bottomLeft()
pt.setX(50)
self.customContextMenuRequested.emit(pt)
def edit(self, idx, trigger=QAbstractItemView.AllEditTriggers, event=None):
"""
this is to prevent:
edit: editing failed
from inside qt
"""
return super().edit(idx, trigger, event)
def on_edited(self, idx: QModelIndex, user_role, text):
self.parent.wallet.set_label(user_role, text)
self.parent.history_model.refresh('on_edited in MyTreeView')
self.parent.utxo_list.update()
self.parent.update_completions()
def should_hide(self, row):
"""
row_num is for self.model(). So if there is a proxy, it is the row number
in that!
"""
return False
def get_text_and_userrole_from_coordinate(self, row_num, column):
idx = self.model().index(row_num, column)
item = self.item_from_index(idx)
user_role = item.data(Qt.UserRole)
return item.text(), user_role
def hide_row(self, row_num):
"""
row_num is for self.model(). So if there is a proxy, it is the row number
in that!
"""
should_hide = self.should_hide(row_num)
if not self.current_filter and should_hide is None:
# no filters at all, neither date nor search
self.setRowHidden(row_num, QModelIndex(), False)
return
for column in self.filter_columns:
txt, _ = self.get_text_and_userrole_from_coordinate(row_num, column)
txt = txt.lower()
if self.current_filter in txt:
# the filter matched, but the date filter might apply
self.setRowHidden(row_num, QModelIndex(), bool(should_hide))
break
else:
# we did not find the filter in any columns, hide the item
self.setRowHidden(row_num, QModelIndex(), True)
def filter(self, p=None):
if p is not None:
p = p.lower()
self.current_filter = p
self.hide_rows()
def hide_rows(self):
for row in range(self.model().rowCount()):
self.hide_row(row)
def create_toolbar(self, config=None):
hbox = QHBoxLayout()
buttons = self.get_toolbar_buttons()
for b in buttons:
b.setVisible(False)
hbox.addWidget(b)
hide_button = QPushButton('x')
hide_button.setVisible(False)
hide_button.pressed.connect(lambda: self.show_toolbar(False, config))
self.toolbar_buttons = buttons + (hide_button,)
hbox.addStretch()
hbox.addWidget(hide_button)
return hbox
def save_toolbar_state(self, state, config):
pass # implemented in subclasses
def show_toolbar(self, state, config=None):
if state == self.toolbar_shown:
return
self.toolbar_shown = state
if config:
self.save_toolbar_state(state, config)
for b in self.toolbar_buttons:
b.setVisible(state)
if not state:
self.on_hide_toolbar()
def toggle_toolbar(self, config=None):
self.show_toolbar(not self.toolbar_shown, config)
def add_copy_menu(self, menu: QMenu, idx) -> QMenu:
cc = menu.addMenu(_("Copy"))
for column in self.Columns:
column_title = self.original_model().horizontalHeaderItem(column).text()
item_col = self.item_from_index(idx.sibling(idx.row(), column))
clipboard_data = item_col.data(self.ROLE_CLIPBOARD_DATA)
if clipboard_data is None:
clipboard_data = item_col.text().strip()
cc.addAction(column_title,
lambda text=clipboard_data, title=column_title:
self.place_text_on_clipboard(text, title=title))
return cc
def place_text_on_clipboard(self, text: str, *, title: str = None) -> None:
self.parent.do_copy(text, title=title)
def showEvent(self, e: 'QShowEvent'):
super().showEvent(e)
if e.isAccepted() and self._pending_update:
self._forced_update = True
self.update()
self._forced_update = False
def maybe_defer_update(self) -> bool:
"""Returns whether we should defer an update/refresh."""
defer = (not self._forced_update
and (not self.isVisible() or self.is_editor_open))
# side-effect: if we decide to defer update, the state will become stale:
self._pending_update = defer
return defer
class MySortModel(QSortFilterProxyModel):
def __init__(self, parent, *, sort_role):
super().__init__(parent)
self._sort_role = sort_role
def lessThan(self, source_left: QModelIndex, source_right: QModelIndex):
item1 = self.sourceModel().itemFromIndex(source_left)
item2 = self.sourceModel().itemFromIndex(source_right)
data1 = item1.data(self._sort_role)
data2 = item2.data(self._sort_role)
if data1 is not None and data2 is not None:
return data1 < data2
v1 = item1.text()
v2 = item2.text()
try:
return Decimal(v1) < Decimal(v2)
except:
return v1 < v2
class ButtonsWidget(QWidget):
def __init__(self):
super(QWidget, self).__init__()
self.buttons = [] # type: List[QToolButton]
def resizeButtons(self):
frameWidth = self.style().pixelMetric(QStyle.PM_DefaultFrameWidth)
x = self.rect().right() - frameWidth - 10
y = self.rect().bottom() - frameWidth
for button in self.buttons:
sz = button.sizeHint()
x -= sz.width()
button.move(x, y - sz.height())
def addButton(self, icon_name, on_click, tooltip):
button = QToolButton(self)
button.setIcon(read_QIcon(icon_name))
button.setIconSize(QSize(25,25))
button.setCursor(QCursor(Qt.PointingHandCursor))
button.setStyleSheet("QToolButton { border: none; hover {border: 1px} pressed {border: 1px} padding: 0px; }")
button.setVisible(True)
button.setToolTip(tooltip)
button.clicked.connect(on_click)
self.buttons.append(button)
return button
def addCopyButton(self, app):
self.app = app
self.addButton("copy.png", self.on_copy, _("Copy to clipboard"))
def on_copy(self):
self.app.clipboard().setText(self.text())
QToolTip.showText(QCursor.pos(), _("Text copied to clipboard"), self)
def addPasteButton(self, app):
self.app = app
self.addButton("copy.png", self.on_paste, _("Paste from clipboard"))
def on_paste(self):
self.setText(self.app.clipboard().text())
class ButtonsLineEdit(QLineEdit, ButtonsWidget):
def __init__(self, text=None):
QLineEdit.__init__(self, text)
self.buttons = []
def resizeEvent(self, e):
o = QLineEdit.resizeEvent(self, e)
self.resizeButtons()
return o
class ButtonsTextEdit(QPlainTextEdit, ButtonsWidget):
def __init__(self, text=None):
QPlainTextEdit.__init__(self, text)
self.setText = self.setPlainText
self.text = self.toPlainText
self.buttons = []
def resizeEvent(self, e):
o = QPlainTextEdit.resizeEvent(self, e)
self.resizeButtons()
return o
class PasswordLineEdit(QLineEdit):
def __init__(self, *args, **kwargs):
QLineEdit.__init__(self, *args, **kwargs)
self.setEchoMode(QLineEdit.Password)
def clear(self):
# Try to actually overwrite the memory.
# This is really just a best-effort thing...
self.setText(len(self.text()) * " ")
super().clear()
class TaskThread(QThread):
'''Thread that runs background tasks. Callbacks are guaranteed
to happen in the context of its parent.'''
class Task(NamedTuple):
task: Callable
cb_success: Optional[Callable]
cb_done: Optional[Callable]
cb_error: Optional[Callable]
doneSig = pyqtSignal(object, object, object)
def __init__(self, parent, on_error=None):
super(TaskThread, self).__init__(parent)
self.on_error = on_error
self.tasks = queue.Queue()
self.doneSig.connect(self.on_done)
self.start()
def add(self, task, on_success=None, on_done=None, on_error=None):
on_error = on_error or self.on_error
self.tasks.put(TaskThread.Task(task, on_success, on_done, on_error))
def run(self):
while True:
task = self.tasks.get() # type: TaskThread.Task
if not task:
break
try:
result = task.task()
self.doneSig.emit(result, task.cb_done, task.cb_success)
except BaseException:
self.doneSig.emit(sys.exc_info(), task.cb_done, task.cb_error)
def on_done(self, result, cb_done, cb_result):
# This runs in the parent's thread.
if cb_done:
cb_done()
if cb_result:
cb_result(result)
def stop(self):
self.tasks.put(None)
class ColorSchemeItem:
def __init__(self, fg_color, bg_color):
self.colors = (fg_color, bg_color)
def _get_color(self, background):
return self.colors[(int(background) + int(ColorScheme.dark_scheme)) % 2]
def as_stylesheet(self, background=False):
css_prefix = "background-" if background else ""
color = self._get_color(background)
return "QWidget {{ {}color:{}; }}".format(css_prefix, color)
def as_color(self, background=False):
color = self._get_color(background)
return QColor(color)
class ColorScheme:
dark_scheme = False
GREEN = ColorSchemeItem("#117c11", "#8af296")
YELLOW = ColorSchemeItem("#897b2a", "#ffff00")
RED = ColorSchemeItem("#7c1111", "#f18c8c")
BLUE = ColorSchemeItem("#123b7c", "#8cb3f2")
DEFAULT = ColorSchemeItem("black", "white")
GRAY = ColorSchemeItem("gray", "gray")
@staticmethod
def has_dark_background(widget):
brightness = sum(widget.palette().color(QPalette.Background).getRgb()[0:3])
return brightness < (255*3/2)
@staticmethod
def update_from_widget(widget, force_dark=False):
if force_dark or ColorScheme.has_dark_background(widget):
ColorScheme.dark_scheme = True
class AcceptFileDragDrop:
def __init__(self, file_type=""):
assert isinstance(self, QWidget)
self.setAcceptDrops(True)
self.file_type = file_type
def validateEvent(self, event):
if not event.mimeData().hasUrls():
event.ignore()
return False
for url in event.mimeData().urls():
if not url.toLocalFile().endswith(self.file_type):
event.ignore()
return False
event.accept()
return True
def dragEnterEvent(self, event):
self.validateEvent(event)
def dragMoveEvent(self, event):
if self.validateEvent(event):
event.setDropAction(Qt.CopyAction)
def dropEvent(self, event):
if self.validateEvent(event):
for url in event.mimeData().urls():
self.onFileAdded(url.toLocalFile())
def onFileAdded(self, fn):
raise NotImplementedError()
def import_meta_gui(electrum_window: 'ElectrumWindow', title, importer, on_success):
filter_ = "JSON (*.json);;All files (*)"
filename = getOpenFileName(
parent=electrum_window,
title=_("Open {} file").format(title),
filter=filter_,
config=electrum_window.config,
)
if not filename:
return
try:
importer(filename)
except FileImportFailed as e:
electrum_window.show_critical(str(e))
else:
electrum_window.show_message(_("Your {} were successfully imported").format(title))
on_success()
def export_meta_gui(electrum_window: 'ElectrumWindow', title, exporter):
filter_ = "JSON (*.json);;All files (*)"
filename = getSaveFileName(
parent=electrum_window,
title=_("Select file to save your {}").format(title),
filename='electrum_{}.json'.format(title),
filter=filter_,
config=electrum_window.config,
)
if not filename:
return
try:
exporter(filename)
except FileExportFailed as e:
electrum_window.show_critical(str(e))
else:
electrum_window.show_message(_("Your {0} were exported to '{1}'")
.format(title, str(filename)))
def getOpenFileName(*, parent, title, filter="", config: 'SimpleConfig') -> Optional[str]:
"""Custom wrapper for getOpenFileName that remembers the path selected by the user."""
directory = config.get('io_dir', os.path.expanduser('~'))
fileName, __ = QFileDialog.getOpenFileName(parent, title, directory, filter)
if fileName and directory != os.path.dirname(fileName):
config.set_key('io_dir', os.path.dirname(fileName), True)
return fileName
def getSaveFileName(
*,
parent,
title,
filename,
filter="",
default_extension: str = None,
default_filter: str = None,
config: 'SimpleConfig',
) -> Optional[str]:
"""Custom wrapper for getSaveFileName that remembers the path selected by the user."""
directory = config.get('io_dir', os.path.expanduser('~'))
path = os.path.join(directory, filename)
file_dialog = QFileDialog(parent, title, path, filter)
file_dialog.setAcceptMode(QFileDialog.AcceptSave)
if default_extension:
# note: on MacOS, the selected filter's first extension seems to have priority over this...
file_dialog.setDefaultSuffix(default_extension)
if default_filter:
assert default_filter in filter, f"default_filter={default_filter!r} does not appear in filter={filter!r}"
file_dialog.selectNameFilter(default_filter)
if file_dialog.exec() != QDialog.Accepted:
return None
selected_path = file_dialog.selectedFiles()[0]
if selected_path and directory != os.path.dirname(selected_path):
config.set_key('io_dir', os.path.dirname(selected_path), True)
return selected_path
def icon_path(icon_basename):
return resource_path('gui', 'icons', icon_basename)
@lru_cache(maxsize=1000)
def read_QIcon(icon_basename):
return QIcon(icon_path(icon_basename))
class IconLabel(QWidget):
IconSize = QSize(16, 16)
HorizontalSpacing = 2
def __init__(self, *, text='', final_stretch=True):
super(QWidget, self).__init__()
layout = QHBoxLayout()
layout.setContentsMargins(0, 0, 0, 0)
self.setLayout(layout)
self.icon = QLabel()
self.label = QLabel(text)
layout.addWidget(self.label)
layout.addSpacing(self.HorizontalSpacing)
layout.addWidget(self.icon)
if final_stretch:
layout.addStretch()
def setText(self, text):
self.label.setText(text)
def setIcon(self, icon):
self.icon.setPixmap(icon.pixmap(self.IconSize))
self.icon.repaint() # macOS hack for #6269
def get_default_language():
name = QLocale.system().name()
return name if name in languages else 'en_UK'
def char_width_in_lineedit() -> int:
char_width = QFontMetrics(QLineEdit().font()).averageCharWidth()
# 'averageCharWidth' seems to underestimate on Windows, hence 'max()'
return max(9, char_width)
def webopen(url: str):
if sys.platform == 'linux' and os.environ.get('APPIMAGE'):
# When on Linux webbrowser.open can fail in AppImage because it can't find the correct libdbus.
# We just fork the process and unset LD_LIBRARY_PATH before opening the URL.
# See #5425
if os.fork() == 0:
del os.environ['LD_LIBRARY_PATH']
webbrowser.open(url)
os._exit(0)
else:
webbrowser.open(url)
if __name__ == "__main__":
app = QApplication([])
t = WaitingDialog(None, 'testing ...', lambda: [time.sleep(1)], lambda x: QMessageBox.information(None, 'done', "done"))
t.start()
app.exec_()