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views.py
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views.py
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""" GUI components for the BlueGraph application.
"""
import sys
import logging
import pyqtgraph
from PySide import QtGui, QtSvg, QtCore
from assets import bluegraph_resources_rc
log = logging.getLogger(__name__)
class Basic(QtGui.QMainWindow):
""" The most basic window possible for testing pyside, xvfb and
travis integration.
"""
def __init__(self):
super(Basic, self).__init__()
self.lblInfo = QtGui.QLabel("Default")
self.hbox = QtGui.QHBoxLayout()
self.hbox.addWidget(self.lblInfo)
self.setLayout(self.hbox)
self.setGeometry(0, 0, 800, 600)
self.show()
class MultiGraphLayout(QtGui.QMainWindow):
""" Provie a bare form layout with background transparency on
which to place various bluegraph controls.
"""
def __init__(self, parent=None):
super(MultiGraphLayout, self).__init__(parent)
self.central_widget = QtGui.QStackedWidget()
self.setCentralWidget(self.central_widget)
# Requires a compositing window manager to be translucent
self.setAttribute(QtCore.Qt.WA_TranslucentBackground)
self.setWindowFlags(QtCore.Qt.Tool | QtCore.Qt.FramelessWindowHint)
self.setWindowFlags(self.windowFlags()
| QtCore.Qt.WindowStaysOnTopHint)
self.vbox = QtGui.QVBoxLayout()
self.main_widget = QtGui.QWidget()
self.main_widget.setLayout(self.vbox)
self.central_widget.addWidget(self.main_widget)
self.setContentsMargins(0, 0, 0, 0)
self.vbox.setContentsMargins(0, 0, 0, 0)
self.create_signals()
self.setGeometry(300, 0, 900, 1080)
self.show()
def create_signals(self):
""" Create signal objects to be used by controller.
"""
class ViewClose(QtCore.QObject):
exit = QtCore.Signal(str)
self.exit_signal = ViewClose()
def closeEvent(self, event):
log.debug("Pixmap level close")
self.exit_signal.exit.emit("close event")
class PixmapBackedGraph(QtGui.QWidget):
def __init__(self, title="Blue Graph", icon="default"):
super(PixmapBackedGraph, self).__init__()
self.main_layout = QtGui.QVBoxLayout()
self.setLayout(self.main_layout)
self.scene = QtGui.QGraphicsScene()
filename = ":ui/graph_export.png"
self.graphback = SceneGraphBackground(self.scene, filename,
title=title, icon=icon)
self.scene.addItem(self.graphback)
self.view = QtGui.QGraphicsView(self.scene)
view_style = ("background: transparent;"
"border: 0px"
)
self.view.setStyleSheet(view_style)
self.setStyleSheet(view_style)
self.main_layout.addWidget(self.view)
self.main_layout.setSpacing(0)
self.main_layout.setContentsMargins(0, 0, 0, 0)
# Requires a compositing window manager to be translucent
self.setAttribute(QtCore.Qt.WA_TranslucentBackground)
self.setWindowFlags(QtCore.Qt.Tool | QtCore.Qt.FramelessWindowHint)
self.setWindowFlags(self.windowFlags()
| QtCore.Qt.WindowStaysOnTopHint)
self.show()
self.scale = 1.0
ramp_data = range(2048)
green_pen = "#1fd11f" # semi light-green
self.curve = self.graphback.plot.plot(ramp_data, pen=green_pen)
self.create_signals()
def create_signals(self):
""" Create signal objects to be used by controller.
"""
class ViewClose(QtCore.QObject):
exit = QtCore.Signal(str)
self.exit_signal = ViewClose()
def closeEvent(self, event):
log.debug("Pixmap level close")
self.exit_signal.exit.emit("close event")
class SceneGraphBackground(QtGui.QGraphicsPixmapItem):
""" Like GraphBackground, but include the scene parameter so
certain widgets will add correctly. pyqtgraph plotwidget for
example, requires that you add it to the scene first, then set the
parent on the return of the addWidget command.
"""
def __init__(self, scene, filename, title="BLUE GRAPH",
icon="default"):
super(SceneGraphBackground, self).__init__(filename)
# The main font
font_name = ":ui/fonts/GearsOfPeace.ttf"
QtGui.QFontDatabase.addApplicationFont(font_name)
# The plot widget. As a component of a qgraphicspixmapitem,
# apparently the background=None does not actually set the
# background to none. Override it with a background set to
# transparent in the style sheet parameter
self.plot = pyqtgraph.PlotWidget(name="mystery",
background=None)
self.plot.setStyleSheet("background: transparent;")
result = scene.addWidget(self.plot)
result.setParentItem(self)
self.plot.setGeometry(QtCore.QRect(32, 333-291, 668, 270))
self.add_main_title(title, self)
icon_filename = ":ui/%s_icon.svg" % icon
self.add_main_icon(icon_filename, self)
self.minimum = SmallTextBox(prefix="MIN:")
self.minimum.setPos(706, 333-233)
self.minimum.setParentItem(self)
self.maximum = SmallTextBox(prefix="MAX:", val="987.65")
self.maximum.setPos(706, 333-164)
self.maximum.setParentItem(self)
self.view_fps = SmallTextBox(prefix="FPS:", val="9999")
self.view_fps.setPos(706, 333-95)
self.view_fps.setParentItem(self)
prefix = ":ui/toggle_button_"
self.pause_button = ToggleButton(prefix=prefix)
self.pause_button.setPos(706, 333-289)
self.pause_button.setParentItem(self)
def add_main_icon(self, filename, parent):
""" Add a graphical indicator pixmap to the title area.
"""
# The icon to the left of the main title
self.icon = QtGui.QGraphicsPixmapItem(filename)
self.icon.setPos(33, 13)
self.icon.setParentItem(parent)
self.icon_shadow = QtGui.QGraphicsDropShadowEffect()
self.icon_shadow.setOffset(2, 2)
self.icon.setGraphicsEffect(self.icon_shadow)
def add_main_title(self, title, parent):
""" Add a text item with drop shadow.
"""
# Filename will work on linux, actual font name with spaces is
# required for success on windows
self.default_font = QtGui.QFont("Gears of Peace")
self.default_font.setPointSize( 12 )
white = QtGui.QColor(255, 255, 255, 255)
self.title = QtGui.QGraphicsSimpleTextItem(title)
self.title.setPos(65, 14)
self.title.setBrush(white)
self.title.setParentItem(parent)
self.title.setFont(self.default_font)
self.shadow = QtGui.QGraphicsDropShadowEffect()
self.shadow.setOffset(2, 2)
self.title.setGraphicsEffect(self.shadow)
class ToggleButton(QtGui.QGraphicsPixmapItem):
""" Switch foreground pixmap elements to indicate toggled states.
"""
def __init__(self, designator="default",
prefix=":ui/toggle_button_"):
self.activated = "%s%s.png" % (prefix, "activated")
self.deactivated = "%s%s.png" % (prefix, "deactivated")
super(ToggleButton, self).__init__(self.activated)
self._state = "play"
self.shadow = QtGui.QGraphicsDropShadowEffect()
self.shadow.setColor(QtGui.QColor(0, 0, 0, 128))
self.shadow.setOffset(2, 2)
self.setGraphicsEffect(self.shadow)
@property
def state(self):
return self._state
def mousePressEvent(self, event):
log.debug("you pressed %s", event.pos())
if self._state == "play":
self._state = "pause"
self.setPixmap(self.deactivated)
else:
self._state = "play"
self.setPixmap(self.activated)
class SmallTextBox(QtGui.QGraphicsPixmapItem):
""" Designed to display an abbreviated text description and a %3.2f
formatted value.
"""
def __init__(self, prefix="Min", val="123.45",
filename="small_number_designator_export.png"):
full_path = ":ui/%s" % filename
super(SmallTextBox, self).__init__(full_path)
white = QtGui.QColor(255, 255, 255, 255)
self.prefix_font = QtGui.QFont("Gears of Peace")
self.prefix_font.setPointSize(7)
self.prefix = QtGui.QGraphicsSimpleTextItem(prefix)
self.prefix.setPos(5, 5)
self.prefix.setBrush(white)
self.prefix.setParentItem(self)
self.prefix.setFont(self.prefix_font)
self.value_font = QtGui.QFont("Gears of Peace")
self.value_font.setPointSize(6)
self.value = QtGui.QGraphicsSimpleTextItem(val)
self.value.setPos(4, 22)
self.value.setBrush(white)
self.value.setParentItem(self)
self.value.setFont(self.value_font)
self.shadow = QtGui.QGraphicsDropShadowEffect()
self.shadow.setColor(QtGui.QColor(0, 0, 0, 128))
self.shadow.setOffset(2, 2)
self.setGraphicsEffect(self.shadow)
@property
def text(self):
return self.value.text()
def is_number(self, s):
try:
float(s)
return True
except ValueError:
return False
def setText(self, new_text):
if self.is_number(new_text):
new_text = "%3.2f" % float(new_text * 1.0)
self.value.setText(str(new_text))