class TimelineView(QGraphicsView):
"""
This class draws a graphical representation of a timeline.
This is ONLY the bar and colored boxes.
When you instantiate this class, do NOT forget to call set_init_data to
set necessary data.
"""
redraw = Signal()
def __init__(self, parent):
"""Cannot take args other than parent due to loadUi limitation."""
super(TimelineView, self).__init__()
self._parent = parent
self._timeline_marker = QIcon.fromTheme('system-search')
self._min = 0
self._max = 0
self._xpos_marker = 5
self._timeline_marker_width = 15
self._timeline_marker_height = 15
self._last_marker_at = 2
self.redraw.connect(self._slot_redraw)
self._timeline = None
self.setUpdatesEnabled(True)
self._scene = QGraphicsScene(self)
self.setScene(self._scene)
def set_timeline(self, timeline, name=None):
assert(self._timeline is None)
self._name = name
self._timeline = timeline
self._timeline.message_updated.connect(self._updated)
@Slot()
def _updated(self):
"""
Update the widget whenever we receive a new message
"""
# update the limits
self._min = 0
self._max = len(self._timeline)-1
# update the marker position
self._xpos_marker = self._timeline.get_position()
# redraw
self.redraw.emit()
def mouseReleaseEvent(self, event):
"""
:type event: QMouseEvent
"""
xpos = self.pos_from_x(event.x())
self.set_marker_pos(xpos)
def mousePressEvent(self, event):
"""
:type event: QMouseEvent
"""
assert(self._timeline is not None)
# Pause the timeline
self._timeline.set_paused(True)
xpos = self.pos_from_x(event.x())
self.set_marker_pos(xpos)
def mouseMoveEvent(self, event):
"""
:type event: QMouseEvent
"""
xpos = self.pos_from_x(event.x())
self.set_marker_pos(xpos)
def pos_from_x(self, x):
"""
Get the index in the timeline from the mouse click position
:param x: Position relative to self widget.
:return: Index
"""
width = self.size().width()
# determine value from mouse click
width_cell = width / float(len(self._timeline))
return int(floor(x / width_cell))
def set_marker_pos(self, xpos):
"""
Set marker position from index
:param xpos: Marker index
"""
assert(self._timeline is not None)
self._xpos_marker = self._clamp(xpos, self._min, self._max)
if self._xpos_marker == self._last_marker_at:
# Clicked the same pos as last time.
return
elif self._xpos_marker >= len(self._timeline):
# When clicked out-of-region
return
self._last_marker_at = self._xpos_marker
# Set timeline position. This broadcasts the message at that position
# to all of the other viewers
self._timeline.set_position(self._xpos_marker)
# redraw
self.redraw.emit()
def _clamp(self, val, min, max):
"""
Judge if val is within the range given by min & max.
If not, return either min or max.
:type val: any number format
:type min: any number format
:type max: any number format
:rtype: int
"""
if (val < min):
return min
if (val > max):
return max
return val
@Slot()
def _slot_redraw(self):
"""
Gets called either when new msg comes in or when marker is moved by
user.
"""
self._scene.clear()
qsize = self.size()
width_tl = qsize.width()
w = width_tl / float(max(len(self._timeline), 1))
is_enabled = self.isEnabled()
if self._timeline is not None:
for i, m in enumerate(self._timeline):
h = self.viewport().height()
# Figure out each cell's color.
qcolor = QColor('grey')
if is_enabled:
qcolor = self._get_color_for_value(m)
# TODO Use this code for adding gradation to the cell color.
# end_color = QColor(0.5 * QColor('red').value(),
# 0.5 * QColor('green').value(),
# 0.5 * QColor('blue').value())
self._scene.addRect(w * i, 0, w, h, QColor('white'), qcolor)
# Setting marker.
xpos_marker = (self._xpos_marker * w +
(w / 2.0) - (self._timeline_marker_width / 2.0))
pos_marker = QPointF(xpos_marker, 0)
# Need to instantiate marker everytime since it gets deleted
# in every loop by scene.clear()
timeline_marker = self._instantiate_tl_icon()
timeline_marker.setPos(pos_marker)
self._scene.addItem(timeline_marker)
def _instantiate_tl_icon(self):
timeline_marker_icon = QIcon.fromTheme('system-search')
timeline_marker_icon_pixmap = timeline_marker_icon.pixmap(
self._timeline_marker_width,
self._timeline_marker_height)
return QGraphicsPixmapItem(timeline_marker_icon_pixmap)
def _get_color_for_value(self, msg):
"""
:type msg: DiagnosticArray
"""
if self._name is not None:
# look up name in msg; return grey if not found
status = util.get_status_by_name(msg, self._name)
if status is not None:
return util.level_to_color(status.level)
else:
return QColor('grey')
return util.get_color_for_message(msg)
class TimelineWidget(QWidget):
class TimelineView(QGraphicsView):
def __init__(self, parent):
super(TimelineWidget.TimelineView, self).__init__()
self.parent = parent
def mouseReleaseEvent(self, event):
self.parent.mouse_release(event)
update = pyqtSignal()
def __init__(self, parent):
super(TimelineWidget, self).__init__()
self.parent = parent
self._layout = QHBoxLayout()
#self._view = QGraphicsView()
self._view = TimelineWidget.TimelineView(self)
self._scene = QGraphicsScene()
self._colors = [QColor('green'), QColor('yellow'), QColor('red')]
self._messages = [None for x in range(20)]
self._mq = [1 for x in range(20)]
self._view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self._view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self._view.setScene(self._scene)
self._layout.addWidget(self._view, 1)
self.pause_button = QPushButton('Pause')
self.pause_button.setCheckable(True)
self.pause_button.clicked.connect(self.pause)
self._layout.addWidget(self.pause_button)
self.setLayout(self._layout)
self.update.connect(self.redraw)
def redraw(self):
self._scene.clear()
self._scene
for i, m in enumerate(self._mq):
w = float(self._view.viewport().width())/len(self._mq)
h = self._view.viewport().height()
rect = self._scene.addRect(w*i, 0, w, h, QColor('black'), self._colors[m])
def mouse_release(self, event):
i = int(floor(event.x()/(float(self._view.viewport().width())/len(self._mq))))
msg = self._messages[i]
if msg:
self.parent.pause(msg)
if not self.pause_button.isChecked():
self.pause_button.toggle()
def resizeEvent(self, event):
self.redraw()
def get_worst(self, msg):
lvl = 0
for status in msg.status:
if status.level > lvl:
lvl = status.level
return lvl
def add_message(self, msg):
self._messages = self._messages[1:]
self._messages.append(msg)
self._mq = self._mq[1:]
try:
lvl = msg.level
except AttributeError:
lvl = self.get_worst(msg)
if lvl > 2:
lvl = 2
self._mq.append(lvl)
self.update.emit()
def pause(self, state):
if state:
self.parent.pause(self._messages[-1])
else:
self.parent.unpause()
class TimelineView(QGraphicsView):
"""
This class draws a graphical representation of a timeline.
This is ONLY the bar and colored boxes.
When you instantiate this class, do NOT forget to call set_init_data to
set necessary data.
"""
redraw = Signal()
def __init__(self, parent):
"""Cannot take args other than parent due to loadUi limitation."""
super(TimelineView, self).__init__()
self._parent = parent
self._timeline_marker = QIcon.fromTheme('system-search')
self._min = 0
self._max = 0
self._xpos_marker = 5
self._timeline_marker_width = 15
self._timeline_marker_height = 15
self._last_marker_at = 2
self.redraw.connect(self._slot_redraw)
self._timeline = None
self.setUpdatesEnabled(True)
self._scene = QGraphicsScene(self)
self.setScene(self._scene)
def set_timeline(self, timeline, name=None):
assert (self._timeline is None)
self._name = name
self._timeline = timeline
self._timeline.message_updated.connect(self._updated)
@Slot()
def _updated(self):
"""
Update the widget whenever we receive a new message
"""
# update the limits
self._min = 0
self._max = len(self._timeline) - 1
# update the marker position
self._xpos_marker = self._timeline.get_position()
# redraw
self.redraw.emit()
def mouseReleaseEvent(self, event):
"""
:type event: QMouseEvent
"""
xpos = self.pos_from_x(event.x())
self.set_marker_pos(xpos)
def mousePressEvent(self, event):
"""
:type event: QMouseEvent
"""
assert (self._timeline is not None)
# Pause the timeline
self._timeline.set_paused(True)
xpos = self.pos_from_x(event.x())
self.set_marker_pos(xpos)
def mouseMoveEvent(self, event):
"""
:type event: QMouseEvent
"""
xpos = self.pos_from_x(event.x())
self.set_marker_pos(xpos)
def pos_from_x(self, x):
"""
Get the index in the timeline from the mouse click position
:param x: Position relative to self widget.
:return: Index
"""
width = self.size().width()
# determine value from mouse click
width_cell = width / float(len(self._timeline))
return int(floor(x / width_cell))
def set_marker_pos(self, xpos):
"""
Set marker position from index
:param xpos: Marker index
"""
assert (self._timeline is not None)
self._xpos_marker = self._clamp(xpos, self._min, self._max)
if self._xpos_marker == self._last_marker_at:
# Clicked the same pos as last time.
return
elif self._xpos_marker >= len(self._timeline):
# When clicked out-of-region
return
self._last_marker_at = self._xpos_marker
# Set timeline position. This broadcasts the message at that position
# to all of the other viewers
self._timeline.set_position(self._xpos_marker)
# redraw
self.redraw.emit()
def _clamp(self, val, min, max):
"""
Judge if val is within the range given by min & max.
If not, return either min or max.
:type val: any number format
:type min: any number format
:type max: any number format
:rtype: int
"""
if (val < min):
return min
if (val > max):
return max
return val
@Slot()
def _slot_redraw(self):
"""
Gets called either when new msg comes in or when marker is moved by
user.
"""
self._scene.clear()
qsize = self.size()
width_tl = qsize.width()
w = width_tl / float(max(len(self._timeline), 1))
is_enabled = self.isEnabled()
if self._timeline is not None:
for i, m in enumerate(self._timeline):
h = self.viewport().height()
# Figure out each cell's color.
qcolor = QColor('grey')
if is_enabled:
qcolor = self._get_color_for_value(m)
# TODO Use this code for adding gradation to the cell color.
# end_color = QColor(0.5 * QColor('red').value(),
# 0.5 * QColor('green').value(),
# 0.5 * QColor('blue').value())
self._scene.addRect(w * i, 0, w, h, QColor('white'), qcolor)
# Setting marker.
xpos_marker = (self._xpos_marker * w + (w / 2.0) -
(self._timeline_marker_width / 2.0))
pos_marker = QPointF(xpos_marker, 0)
# Need to instantiate marker everytime since it gets deleted
# in every loop by scene.clear()
timeline_marker = self._instantiate_tl_icon()
timeline_marker.setPos(pos_marker)
self._scene.addItem(timeline_marker)
def _instantiate_tl_icon(self):
timeline_marker_icon = QIcon.fromTheme('system-search')
timeline_marker_icon_pixmap = timeline_marker_icon.pixmap(
self._timeline_marker_width, self._timeline_marker_height)
return QGraphicsPixmapItem(timeline_marker_icon_pixmap)
def _get_color_for_value(self, msg):
"""
:type msg: DiagnosticArray
"""
if self._name is not None:
# look up name in msg; return grey if not found
status = util.get_status_by_name(msg, self._name)
if status is not None:
return util.level_to_color(status.level)
else:
return QColor('grey')
return util.get_color_for_message(msg)