1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
from pyqtgraph.widgets.FileDialog import FileDialog
import pyqtgraph as pg
from pyqtgraph.Qt import QtGui, QtCore, QtSvg
from pyqtgraph.python2_3 import asUnicode
import os, re
LastExportDirectory = None
class Exporter(object):
"""
Abstract class used for exporting graphics to file / printer / whatever.
"""
allowCopy = False # subclasses set this to True if they can use the copy buffer
def __init__(self, item):
"""
Initialize with the item to be exported.
Can be an individual graphics item or a scene.
"""
object.__init__(self)
self.item = item
#def item(self):
#return self.item
def parameters(self):
"""Return the parameters used to configure this exporter."""
raise Exception("Abstract method must be overridden in subclass.")
def export(self, fileName=None, toBytes=False, copy=False):
"""
If *fileName* is None, pop-up a file dialog.
If *toBytes* is True, return a bytes object rather than writing to file.
If *copy* is True, export to the copy buffer rather than writing to file.
"""
raise Exception("Abstract method must be overridden in subclass.")
def fileSaveDialog(self, filter=None, opts=None):
## Show a file dialog, call self.export(fileName) when finished.
if opts is None:
opts = {}
self.fileDialog = FileDialog()
self.fileDialog.setFileMode(QtGui.QFileDialog.AnyFile)
self.fileDialog.setAcceptMode(QtGui.QFileDialog.AcceptSave)
if filter is not None:
if isinstance(filter, basestring):
self.fileDialog.setNameFilter(filter)
elif isinstance(filter, list):
self.fileDialog.setNameFilters(filter)
global LastExportDirectory
exportDir = LastExportDirectory
if exportDir is not None:
self.fileDialog.setDirectory(exportDir)
self.fileDialog.show()
self.fileDialog.opts = opts
self.fileDialog.fileSelected.connect(self.fileSaveFinished)
return
def fileSaveFinished(self, fileName):
fileName = asUnicode(fileName)
global LastExportDirectory
LastExportDirectory = os.path.split(fileName)[0]
## If file name does not match selected extension, append it now
ext = os.path.splitext(fileName)[1].lower().lstrip('.')
selectedExt = re.search(r'\*\.(\w+)\b', asUnicode(self.fileDialog.selectedNameFilter()))
if selectedExt is not None:
selectedExt = selectedExt.groups()[0].lower()
if ext != selectedExt:
fileName = fileName + '.' + selectedExt.lstrip('.')
self.export(fileName=fileName, **self.fileDialog.opts)
def getScene(self):
if isinstance(self.item, pg.GraphicsScene):
return self.item
else:
return self.item.scene()
def getSourceRect(self):
if isinstance(self.item, pg.GraphicsScene):
w = self.item.getViewWidget()
return w.viewportTransform().inverted()[0].mapRect(w.rect())
else:
return self.item.sceneBoundingRect()
def getTargetRect(self):
if isinstance(self.item, pg.GraphicsScene):
return self.item.getViewWidget().rect()
else:
return self.item.mapRectToDevice(self.item.boundingRect())
def setExportMode(self, export, opts=None):
"""
Call setExportMode(export, opts) on all items that will
be painted during the export. This informs the item
that it is about to be painted for export, allowing it to
alter its appearance temporarily
*export* - bool; must be True before exporting and False afterward
*opts* - dict; common parameters are 'antialias' and 'background'
"""
if opts is None:
opts = {}
for item in self.getPaintItems():
if hasattr(item, 'setExportMode'):
item.setExportMode(export, opts)
def getPaintItems(self, root=None):
"""Return a list of all items that should be painted in the correct order."""
if root is None:
root = self.item
preItems = []
postItems = []
if isinstance(root, QtGui.QGraphicsScene):
childs = [i for i in root.items() if i.parentItem() is None]
rootItem = []
else:
childs = root.childItems()
rootItem = [root]
childs.sort(key=lambda a: a.zValue())
while len(childs) > 0:
ch = childs.pop(0)
tree = self.getPaintItems(ch)
if int(ch.flags() & ch.ItemStacksBehindParent) > 0 or (ch.zValue() < 0 and int(ch.flags() & ch.ItemNegativeZStacksBehindParent) > 0):
preItems.extend(tree)
else:
postItems.extend(tree)
return preItems + rootItem + postItems
def render(self, painter, targetRect, sourceRect, item=None):
#if item is None:
#item = self.item
#preItems = []
#postItems = []
#if isinstance(item, QtGui.QGraphicsScene):
#childs = [i for i in item.items() if i.parentItem() is None]
#rootItem = []
#else:
#childs = item.childItems()
#rootItem = [item]
#childs.sort(lambda a,b: cmp(a.zValue(), b.zValue()))
#while len(childs) > 0:
#ch = childs.pop(0)
#if int(ch.flags() & ch.ItemStacksBehindParent) > 0 or (ch.zValue() < 0 and int(ch.flags() & ch.ItemNegativeZStacksBehindParent) > 0):
#preItems.extend(tree)
#else:
#postItems.extend(tree)
#for ch in preItems:
#self.render(painter, sourceRect, targetRect, item=ch)
### paint root here
#for ch in postItems:
#self.render(painter, sourceRect, targetRect, item=ch)
self.getScene().render(painter, QtCore.QRectF(targetRect), QtCore.QRectF(sourceRect))
#def writePs(self, fileName=None, item=None):
#if fileName is None:
#self.fileSaveDialog(self.writeSvg, filter="PostScript (*.ps)")
#return
#if item is None:
#item = self
#printer = QtGui.QPrinter(QtGui.QPrinter.HighResolution)
#printer.setOutputFileName(fileName)
#painter = QtGui.QPainter(printer)
#self.render(painter)
#painter.end()
#def writeToPrinter(self):
#pass
|
