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"""
UI related code for dialogs used by Mu.
Copyright (c) 2015-2020 Nicholas H.Tollervey and others (see the AUTHORS file).
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 3 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, see <http://www.gnu.org/licenses/>.
"""
from PyQt5.QtCore import QSize, Qt, pyqtSignal
from PyQt5.QtWidgets import (
QHBoxLayout,
QWidget,
QLabel,
QComboBox,
)
from mu.resources import load_pixmap
class DeviceSelector(QWidget):
"""
Allow users to see status of connected devices (connected/disconnected),
and select between devices, when multiple are connected.
Emits the device_changed signal when a user selects a different device.
"""
device_changed = pyqtSignal("PyQt_PyObject")
def __init__(self, parent=None, show_label=False, icon_first=False):
"""
Initialize the DeviceSelector
"""
super().__init__(parent)
self.setObjectName("DeviceSelector")
layout = QHBoxLayout()
layout.setContentsMargins(0, 0, 0, 0)
self.setLayout(layout)
self.device_changed.connect(self._update_view)
# Status indicator icon
size = QSize(24, 24)
self.connected_icon = load_pixmap("chip-connected", size=size)
self.disconnected_icon = load_pixmap("chip-disconnected", size=size)
self.connection_status = QLabel()
self.connection_status.setPixmap(self.disconnected_icon)
if icon_first:
layout.addWidget(self.connection_status)
# Device selection combobox
self.selector = QComboBox()
self.selector.setSizeAdjustPolicy(QComboBox.AdjustToContents)
self.selector.setHidden(True)
self.selector.currentIndexChanged.connect(self._device_changed)
layout.addWidget(self.selector)
# Label
self.status_label = None
if show_label:
self.status_label = QLabel(_("No device connected."))
self.status_label.setHidden(True)
layout.addWidget(self.status_label)
layout.addStretch()
self._update_view()
# Status indicator icon (if last)
if not icon_first:
layout.addWidget(self.connection_status)
def set_device_list(self, device_list):
"""
Connect the selector with a DeviceList model
"""
self.selector.setModel(device_list)
device_list.device_connected.connect(self.device_connected)
device_list.device_disconnected.connect(self.device_disconnected)
def selected_device(self):
"""
Return the currently selected device, returns None, if no device
is selected or no devices are connected.
"""
i = self.selector.currentIndex()
if i < 0:
return None
else:
devices = self.selector.model()
return devices[i]
def _device_changed(self, i):
"""
Called when the device is changed by user or programmatically.
Updates the current device and emits the device_changed signal.
"""
if i < 0:
device = None
else:
devices = self.selector.model()
device = devices[i]
self.device_changed.emit(device)
def device_connected(self, device):
"""
Update the view when new devices are connected.
"""
self._update_view()
def device_disconnected(self, device):
"""
Update the view when devices are disconnected.
"""
self._update_view()
def _update_view(self):
"""
Update icon and show/hide combobox-selector, when devices
connects/disconnects
"""
num_devices = self.selector.count()
# Hide/show menu
if num_devices <= 1:
self.selector.setHidden(True)
else:
self.selector.setHidden(False)
# Update status_label
if self.status_label:
if num_devices == 0:
self.status_label.setHidden(False)
self.status_label.setText(_("No device connected."))
elif num_devices == 1:
device = self.selected_device()
self.status_label.setHidden(False)
self.status_label.setText(
"{} ({})".format(device.name, device.port)
)
else:
self.status_label.setHidden(True)
# Set icon and tooltip
if num_devices == 0:
self.connection_status.setPixmap(self.disconnected_icon)
self._set_tooltip(_("No device connected."))
else:
self.connection_status.setPixmap(self.connected_icon)
model = self.selector.model()
ix = model.index(self.selector.currentIndex(), 0)
tooltip = self.selector.model().data(ix, Qt.ToolTipRole)
self._set_tooltip(tooltip)
def _set_tooltip(self, tooltip):
"""
Sets the same tooltip on all widgets
"""
self.connection_status.setToolTip(tooltip)
self.selector.setToolTip(tooltip)
if self.status_label:
self.status_label.setToolTip(tooltip)
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