def updateExportBackground(self, colorname):
"""Update color on export background."""
pixmap = qt4.QPixmap(16, 16)
col = utils.extendedColorToQColor(colorname)
pixmap.fill(col)
# update button (storing color in button itself - what fun!)
self.exportBackgroundButton.setIcon(qt4.QIcon(pixmap))
self.exportBackgroundButton.iconcolor = colorname
def checkPlotUpdate(self):
"""Check whether plot needs updating."""
# print >>sys.stderr, "checking update"
# no threads, so can't get interrupted here
# draw data into background pixmap if modified
if (self.zoomfactor != self.oldzoom
or self.document.changeset != self.docchangeset
or self.pagenumber != self.oldpagenumber):
# print >>sys.stderr, "updating"
self.pickeritem.hide()
self.pagenumber = min(self.document.getNumberPages() - 1,
self.pagenumber)
self.oldpagenumber = self.pagenumber
if self.pagenumber >= 0:
size = self.document.pageSize(self.pagenumber,
scaling=self.zoomfactor)
# draw the data into the buffer
# errors cause an exception window to pop up
try:
phelper = document.PaintHelper(size,
scaling=self.zoomfactor,
dpi=self.dpi)
self.document.paintTo(phelper, self.pagenumber)
except Exception:
# stop updates this time round and show exception dialog
d = exceptiondialog.ExceptionDialog(sys.exc_info(), self)
self.oldzoom = self.zoomfactor
self.docchangeset = self.document.changeset
d.exec_()
self.painthelper = phelper
self.rendercontrol.addJob(phelper)
else:
self.painthelper = None
self.pagenumber = 0
size = self.document.docSize()
pixmap = qt4.QPixmap(*size)
pixmap.fill(setting.settingdb.color('page'))
self.setSceneRect(0, 0, *size)
self.pixmapitem.setPixmap(pixmap)
self.emit(qt4.SIGNAL("sigUpdatePage"), self.pagenumber)
self.updatePageToolbar()
self.updateControlGraphs(self.lastwidgetsselected)
self.oldzoom = self.zoomfactor
self.docchangeset = self.document.changeset
def _pagedocsize(self, widget, dpi, scaling, integer):
"""Helper for page or doc size."""
if dpi is None:
p = qt4.QPixmap(1, 1)
dpi = (p.logicalDpiX(), p.logicalDpiY())
helper = painthelper.PaintHelper((1, 1), dpi=dpi, scaling=scaling)
w = widget.settings.get('width').convert(helper)
h = widget.settings.get('height').convert(helper)
if integer:
return int(w), int(h)
else:
return w, h
def getPreviewPixmap(self, ds):
"""Get a preview pixmap for a dataset."""
size = (140, 70)
if ds.dimensions != 1 or ds.datatype != "numeric":
return None
pixmap = qt4.QPixmap(*size)
pixmap.fill(qt4.Qt.transparent)
p = qt4.QPainter(pixmap)
p.setRenderHint(qt4.QPainter.Antialiasing)
# calculate data points
try:
if len(ds.data) < size[1]:
y = ds.data
else:
intvl = len(ds.data) / size[1] + 1
y = ds.data[::intvl]
x = N.arange(len(y))
# plot data points on image
minval, maxval = N.nanmin(y), N.nanmax(y)
y = (y - minval) / (maxval - minval) * size[1]
finite = N.isfinite(y)
x, y = x[finite], y[finite]
x = x * (1. / len(x)) * size[0]
poly = qt4.QPolygonF()
utils.addNumpyToPolygonF(poly, x, size[1] - y)
p.setPen(qt4.QPen(qt4.Qt.blue))
p.drawPolyline(poly)
# draw x axis if span 0
p.setPen(qt4.QPen(qt4.Qt.black))
if minval <= 0 and maxval > 0:
y0 = size[1] - (0 - minval) / (maxval - minval) * size[1]
p.drawLine(x[0], y0, x[-1], y0)
else:
p.drawLine(x[0], size[1], x[-1], size[1])
p.drawLine(x[0], 0, x[0], size[1])
except (ValueError, ZeroDivisionError):
# zero sized array after filtering or min == max, so return None
p.end()
return None
p.end()
return pixmap
def identifyWidgetAtPoint(self, x, y, antialias=True):
"""What widget has drawn at the point x,y?
Returns the widget drawn last on the point, or None if it is
an empty part of the page.
root is the root widget to recurse from
if antialias is true, do test for antialiased drawing
"""
# make a small image filled with a specific color
box = 3
specialcolor = qt4.QColor(254, 255, 254)
origpix = qt4.QPixmap(2*box+1, 2*box+1)
origpix.fill(specialcolor)
origimg = origpix.toImage()
# store most recent widget here
lastwidget = [None]
def rendernextstate(state):
"""Recursively draw painter.
Checks whether drawing a widgetchanges the small image
around the point given.
"""
pixmap = qt4.QPixmap(origpix)
painter = qt4.QPainter(pixmap)
painter.setRenderHint(qt4.QPainter.Antialiasing, antialias)
painter.setRenderHint(qt4.QPainter.TextAntialiasing, antialias)
# this makes the small image draw from x-box->x+box, y-box->y+box
# translate would get overriden by coordinate system playback
painter.setWindow(x-box,y-box,box*2+1,box*2+1)
state.record.play(painter)
painter.end()
newimg = pixmap.toImage()
if newimg != origimg:
lastwidget[0] = state.widget
for child in state.children:
rendernextstate(child)
rendernextstate(self.rootstate)
return lastwidget[0]
def rendernextstate(state):
"""Recursively draw painter.
Checks whether drawing a widgetchanges the small image
around the point given.
"""
pixmap = qt4.QPixmap(origpix)
painter = qt4.QPainter(pixmap)
painter.setRenderHint(qt4.QPainter.Antialiasing, antialias)
painter.setRenderHint(qt4.QPainter.TextAntialiasing, antialias)
# this makes the small image draw from x-box->x+box, y-box->y+box
# translate would get overriden by coordinate system playback
painter.setWindow(x-box,y-box,box*2+1,box*2+1)
state.record.play(painter)
painter.end()
newimg = pixmap.toImage()
if newimg != origimg:
lastwidget[0] = state.widget
for child in state.children:
rendernextstate(child)
def makeSplashLogo():
'''Make a splash screen logo.'''
border = 16
xw, yw = 520, 240
pix = qt4.QPixmap(xw, yw)
pix.fill()
p = qt4.QPainter(pix)
# draw logo on pixmap
logo = utils.getPixmap('logo.png')
p.drawPixmap(xw / 2 - logo.width() / 2, border, logo)
# add copyright text
doc = qt4.QTextDocument()
doc.setPageSize(qt4.QSizeF(xw, yw - 3 * border - logo.height()))
f = qt4.qApp.font()
f.setPointSize(14)
doc.setDefaultFont(f)
doc.setDefaultTextOption(qt4.QTextOption(qt4.Qt.AlignCenter))
doc.setHtml(splashcopyr % utils.version())
p.translate(0, 2 * border + logo.height())
doc.drawContents(p)
p.end()
return pix
def updateButtonColors(self):
"""Update color icons on color buttons."""
for name, val in self.chosencolors.iteritems():
pixmap = qt4.QPixmap(16, 16)
pixmap.fill(val)
self.colorbutton[name].setIcon(qt4.QIcon(pixmap))
def __init__(self, document, parent, menu=None):
"""Initialise the window.
menu gives a menu to add any menu items to
"""
qt4.QGraphicsView.__init__(self, parent)
self.setBackgroundRole(qt4.QPalette.Dark)
self.scene = qt4.QGraphicsScene()
self.setScene(self.scene)
# this graphics scene item is the actual graph
pixmap = qt4.QPixmap(1, 1)
self.dpi = (pixmap.logicalDpiX(), pixmap.logicalDpiY())
self.pixmapitem = self.scene.addPixmap(pixmap)
# whether full screen mode
self.isfullscreen = False
# set to be parent's actions
self.vzactions = None
# for controlling plot elements
g = self.controlgraphgroup = qt4.QGraphicsItemGroup()
g.setHandlesChildEvents(False)
self.scene.addItem(g)
# zoom rectangle for zooming into graph (not shown normally)
self.zoomrect = self.scene.addRect(0, 0, 100, 100,
qt4.QPen(qt4.Qt.DotLine))
self.zoomrect.setZValue(2.)
self.zoomrect.hide()
# picker graphicsitem for marking the picked point
self.pickeritem = PickerCrosshairItem()
self.scene.addItem(self.pickeritem)
self.pickeritem.setZValue(2.)
self.pickeritem.hide()
# all the widgets that picker key-navigation might cycle through
self.pickerwidgets = []
# the picker state
self.pickerinfo = widgets.PickInfo()
# set up so if document is modified we are notified
self.document = document
self.docchangeset = -100
self.oldpagenumber = -1
self.connect(self.document, qt4.SIGNAL("sigModified"),
self.slotDocModified)
# state of last plot from painthelper
self.painthelper = None
self.lastwidgetsselected = []
self.oldzoom = -1.
self.zoomfactor = 1.
self.pagenumber = 0
self.ignoreclick = False
# for rendering plots in separate threads
self.rendercontrol = RenderControl(self)
self.connect(self.rendercontrol, qt4.SIGNAL("renderfinished"),
self.slotRenderFinished)
# mode for clicking
self.clickmode = 'select'
self.currentclickmode = None
# wheel zooming accumulator
self.sumwheeldelta = 0
# set up redrawing timer
self.timer = qt4.QTimer(self)
self.connect(self.timer, qt4.SIGNAL('timeout()'), self.checkPlotUpdate)
# for drag scrolling
self.grabpos = None
self.scrolltimer = qt4.QTimer(self)
self.scrolltimer.setSingleShot(True)
# for turning clicking into scrolling after a period
self.connect(self.scrolltimer, qt4.SIGNAL('timeout()'),
self.slotBecomeScrollClick)
# get plot view updating policy
# -1: update on document changes
# 0: never update automatically
# >0: check for updates every x ms
self.interval = setting.settingdb['plot_updatepolicy']
# if using a time-based document update checking, start timer
if self.interval > 0:
self.timer.start(self.interval)
# load antialias settings
self.antialias = setting.settingdb['plot_antialias']
# allow window to get focus, to allow context menu
self.setFocusPolicy(qt4.Qt.StrongFocus)
# get mouse move events if mouse is not pressed
self.setMouseTracking(True)
# create toolbar in main window (urgh)
self.createToolbar(parent, menu)
def getPixmap(pixmap):
"""Return a cached QPixmap for the filename in the icons directory."""
if pixmap not in _pixmapcache:
_pixmapcache[pixmap] = qt4.QPixmap(os.path.join(imagedir, pixmap))
return _pixmapcache[pixmap]
