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from .Exporter import Exporter
from pyqtgraph.parametertree import Parameter
from pyqtgraph.Qt import QtGui, QtCore, QtSvg
import re
__all__ = ['PrintExporter']
#__all__ = [] ## Printer is disabled for now--does not work very well.
class PrintExporter(Exporter):
Name = "Printer"
def __init__(self, item):
Exporter.__init__(self, item)
tr = self.getTargetRect()
self.params = Parameter(name='params', type='group', children=[
{'name': 'width', 'type': 'float', 'value': 0.1, 'limits': (0, None), 'suffix': 'm', 'siPrefix': True},
{'name': 'height', 'type': 'float', 'value': (0.1 * tr.height()) / tr.width(), 'limits': (0, None), 'suffix': 'm', 'siPrefix': True},
])
self.params.param('width').sigValueChanged.connect(self.widthChanged)
self.params.param('height').sigValueChanged.connect(self.heightChanged)
def widthChanged(self):
sr = self.getSourceRect()
ar = sr.height() / sr.width()
self.params.param('height').setValue(self.params['width'] * ar, blockSignal=self.heightChanged)
def heightChanged(self):
sr = self.getSourceRect()
ar = sr.width() / sr.height()
self.params.param('width').setValue(self.params['height'] * ar, blockSignal=self.widthChanged)
def parameters(self):
return self.params
def export(self, fileName=None):
printer = QtGui.QPrinter(QtGui.QPrinter.HighResolution)
dialog = QtGui.QPrintDialog(printer)
dialog.setWindowTitle("Print Document")
if dialog.exec_() != QtGui.QDialog.Accepted:
return;
#dpi = QtGui.QDesktopWidget().physicalDpiX()
#self.svg.setSize(QtCore.QSize(100,100))
#self.svg.setResolution(600)
#res = printer.resolution()
sr = self.getSourceRect()
#res = sr.width() * .4 / (self.params['width'] * 100 / 2.54)
res = QtGui.QDesktopWidget().physicalDpiX()
printer.setResolution(res)
rect = printer.pageRect()
center = rect.center()
h = self.params['height'] * res * 100. / 2.54
w = self.params['width'] * res * 100. / 2.54
x = center.x() - w/2.
y = center.y() - h/2.
targetRect = QtCore.QRect(x, y, w, h)
sourceRect = self.getSourceRect()
painter = QtGui.QPainter(printer)
try:
self.setExportMode(True, {'painter': painter})
self.getScene().render(painter, QtCore.QRectF(targetRect), QtCore.QRectF(sourceRect))
finally:
self.setExportMode(False)
painter.end()
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