def make():
demo = QWidget()
demo.setWindowTitle('Cpu Plot')
plot = CpuPlot(demo)
plot.setTitle("History")
label = QLabel("Press the legend to en/disable a curve", demo)
layout = QVBoxLayout(demo)
layout.addWidget(plot)
layout.addWidget(label)
demo.resize(600, 400)
demo.show()
return demo
class LegendView(QScrollArea):
def __init__(self, parent):
QScrollArea.__init__(self, parent)
self.gridLayout = None
self.contentsWidget = QWidget(self)
self.contentsWidget.setObjectName("QwtLegendViewContents")
self.setWidget(self.contentsWidget)
self.setWidgetResizable(False)
self.viewport().setObjectName("QwtLegendViewport")
self.contentsWidget.setAutoFillBackground(False)
self.viewport().setAutoFillBackground(False)
def event(self, event):
if event.type() == QEvent.PolishRequest:
self.setFocusPolicy(Qt.NoFocus)
if event.type() == QEvent.Resize:
cr = self.contentsRect()
w = cr.width()
h = self.contentsWidget.heightForWidth(cr.width())
if h > w:
w -= self.verticalScrollBar().sizeHint().width()
h = self.contentsWidget.heightForWidth(w)
self.contentsWidget.resize(w, h)
return QScrollArea.event(self, event)
def viewportEvent(self, event):
ok = QScrollArea.viewportEvent(self, event)
if event.type() == QEvent.Resize:
self.layoutContents()
return ok
def viewportSize(self, w, h):
sbHeight = self.horizontalScrollBar().sizeHint().height()
sbWidth = self.verticalScrollBar().sizeHint().width()
cw = self.contentsRect().width()
ch = self.contentsRect().height()
vw = cw
vh = ch
if w > vw:
vh -= sbHeight
if h > vh:
vw -= sbWidth
if w > vw and vh == ch:
vh -= sbHeight
return QSize(vw, vh)
def layoutContents(self):
tl = self.gridLayout
if tl is None:
return
visibleSize = self.viewport().contentsRect().size()
margins = tl.contentsMargins()
margin_w = margins.left() + margins.right()
minW = int(tl.maxItemWidth()+margin_w)
w = max([visibleSize.width(), minW])
h = max([tl.heightForWidth(w), visibleSize.height()])
vpWidth = self.viewportSize(w, h).width()
if w > vpWidth:
w = max([vpWidth, minW])
h = max([tl.heightForWidth(w), visibleSize.height()])
self.contentsWidget.resize(w, h)
