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
176
177
178
179
180
181
182
|
#!/usr/bin/env python
# /*##########################################################################
#
# Copyright (c) 2016-2020 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""
Example of drop zone supporting application/x-silx-uri.
This example illustrates the support of drag&drop of silx URLs.
It provides 2 URLs (corresponding to 2 datasets) that can be dragged to
either a :class:`PlotWidget` or a QLable displaying the URL information.
"""
__authors__ = ["V. Valls"]
__license__ = "MIT"
__date__ = "25/01/2019"
import logging
import os
import tempfile
import h5py
import numpy
import silx.io
from silx.gui import qt
from silx.gui.plot.PlotWidget import PlotWidget
_logger = logging.getLogger(__name__)
logging.basicConfig()
class DropPlotWidget(PlotWidget):
"""PlotWidget accepting drop of silx URLs"""
def __init__(self, parent=None, backend=None):
PlotWidget.__init__(self, parent=parent, backend=backend)
self.setAcceptDrops(True)
def dragEnterEvent(self, event):
if event.mimeData().hasFormat("application/x-silx-uri"):
event.acceptProposedAction()
def dropEvent(self, event):
byteString = event.mimeData().data("application/x-silx-uri")
silxUrl = byteString.data().decode("utf-8")
with silx.io.open(silxUrl) as h5:
if silx.io.is_dataset(h5):
dataset = h5[...]
else:
_logger.error("Unsupported URI")
dataset = None
if dataset is not None:
if dataset.ndim == 1:
self.clear()
self.addCurve(y=dataset, x=range(dataset.size))
event.acceptProposedAction()
elif dataset.ndim == 2:
self.clear()
self.addImage(data=dataset)
event.acceptProposedAction()
else:
_logger.error("Unsupported dataset")
class DropLabel(qt.QLabel):
"""Label widget accepting drop of silx URLs"""
DEFAULT_TEXT = "Drop an URL here to display information"
def __init__(self, parent=None):
qt.QLabel.__init__(self, parent)
self.setAcceptDrops(True)
self.setUrl(silx.io.url.DataUrl())
def setUrl(self, url):
template = ("<html>URL information (drop an URL here to parse its information):<ul>"
"<li><b>file_path</b>: {file_path}</li>"
"<li><b>data_path</b>: {data_path}</li>"
"<li><b>data_slice</b>: {data_slice}</li>"
"<li><b>scheme</b>: {scheme}</li>"
"</ul></html>"
)
text = template.format(
file_path=url.file_path(),
data_path=url.data_path(),
data_slice=url.data_slice(),
scheme=url.scheme())
self.setText(text)
def dragEnterEvent(self, event):
if event.mimeData().hasFormat("application/x-silx-uri"):
event.acceptProposedAction()
def dropEvent(self, event):
byteString = event.mimeData().data("application/x-silx-uri")
url = silx.io.url.DataUrl(byteString.data().decode("utf-8"))
self.setUrl(url)
event.acceptProposedAction()
class DragLabel(qt.QLabel):
"""Label widget providing a silx URL to drag"""
def __init__(self, parent=None, url=None):
self._url = url
qt.QLabel.__init__(self, parent)
self.setText('-' if url is None else "- " + self._url.path())
def mousePressEvent(self, event):
if event.button() == qt.Qt.LeftButton and self._url is not None:
mimeData = qt.QMimeData()
mimeData.setText(self._url.path())
mimeData.setData(
"application/x-silx-uri",
self._url.path().encode(encoding='utf-8'))
drag = qt.QDrag(self)
drag.setMimeData(mimeData)
dropAction = drag.exec()
class DragAndDropExample(qt.QMainWindow):
"""Main window of the example"""
def __init__(self, parent=None, urls=()):
super(DragAndDropExample, self).__init__(parent)
centralWidget = qt.QWidget(self)
layout = qt.QVBoxLayout()
centralWidget.setLayout(layout)
layout.addWidget(qt.QLabel(
"Drag and drop one of the following URLs on the plot or on the URL information zone:",
self))
for url in urls:
layout.addWidget(DragLabel(parent=self, url=url))
layout.addWidget(DropPlotWidget(parent=self))
layout.addWidget(DropLabel(parent=self))
self.setCentralWidget(centralWidget)
def main():
app = qt.QApplication([])
with tempfile.TemporaryDirectory() as tempdir:
# Create temporary file with datasets
filename = os.path.join(tempdir, "file.h5")
with h5py.File(filename, "w") as f:
f['image'] = numpy.arange(10000.).reshape(100, 100)
f['curve'] = numpy.sin(numpy.linspace(0, 2*numpy.pi, 1000))
# Create widgets
example = DragAndDropExample(urls=(
silx.io.url.DataUrl(file_path=filename, data_path='/image', scheme="silx"),
silx.io.url.DataUrl(file_path=filename, data_path='/curve', scheme="silx")))
example.setWindowTitle("Drag&Drop URLs sample code")
example.show()
app.exec()
if __name__ == "__main__":
main()
|
