class StatusScrollArea(QScrollArea):
def __init__(self):
super(StatusScrollArea, self).__init__()
self._width = 0
self._group_count = 0
self._pan_pos = None
self.__create_ui()
self.__init_ui()
def __create_ui(self):
self.container = QWidget()
self.container_layout = QHBoxLayout()
self.container.setLayout(self.container_layout)
self.setWidget(self.container)
def __init_ui(self):
self.container.setFixedHeight(TOOLBAR_BUTTON_SIZE)
self.container_layout.setContentsMargins(0, 0, 0, 0)
self.container_layout.setSpacing(1)
self.container_layout.setAlignment(Qt.AlignLeft)
self.setFixedHeight(TOOLBAR_BUTTON_SIZE)
self.setFocusPolicy(Qt.NoFocus)
self.setFrameShape(self.NoFrame)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
def _update_width(self, expand_value):
self._width += expand_value
self.container.setFixedWidth(self._width + self._group_count)
def mousePressEvent(self, event):
if event.button() == Qt.MidButton:
QApplication.setOverrideCursor(QCursor(Qt.SizeHorCursor))
self._pan_pos = event.globalPos()
event.accept()
else:
event.ignore()
def mouseReleaseEvent(self, event):
if event.button() == Qt.MidButton:
QApplication.restoreOverrideCursor()
self._pan_pos = None
event.accept()
else:
event.ignore()
def mouseMoveEvent(self, event):
if self._pan_pos:
h_bar = self.horizontalScrollBar()
h_bar_pos = h_bar.sliderPosition()
cursor_pos = event.globalPos()
cursor_delta = (cursor_pos - self._pan_pos).x()
h_bar.setValue(h_bar_pos - cursor_delta)
self._pan_pos = cursor_pos
event.accept()
else:
event.ignore()
def wheelEvent(self, event):
if event.orientation() == Qt.Vertical:
num_degrees = event.delta() / 8
h_bar = self.horizontalScrollBar()
h_bar_pos = h_bar.sliderPosition()
h_bar.setValue(h_bar_pos - num_degrees)
else:
super(StatusScrollArea, self).wheelEvent(event)
def resizeEvent(self, event):
max_scroll = max(0, self.container.width() - event.size().width())
self.horizontalScrollBar().setMaximum(max_scroll)
def add_widget(self, widget):
# add widget to layout
self.container_layout.addWidget(widget)
# connect widget for future update when user interact with it
widget.toggled.connect(self._update_width)
# expand widget layout
self._width += widget.max_length()
self._group_count += 1
self.container.setFixedWidth(self._width)
