diff options
Diffstat (limited to 'examples/dropZones.py')
| -rw-r--r-- | examples/dropZones.py | 113 |
1 files changed, 82 insertions, 31 deletions
diff --git a/examples/dropZones.py b/examples/dropZones.py index 27d9df8..68d0a57 100644 --- a/examples/dropZones.py +++ b/examples/dropZones.py @@ -2,7 +2,7 @@ # coding: utf-8 # /*########################################################################## # -# Copyright (c) 2016-2019 European Synchrotron Radiation Facility +# 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 @@ -24,7 +24,11 @@ # # ###########################################################################*/ """ -Example of drop zone supporting application/x-silx-uri +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. """ from __future__ import absolute_import @@ -34,6 +38,12 @@ __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 @@ -43,6 +53,7 @@ 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) @@ -76,11 +87,30 @@ class DropPlotWidget(PlotWidget): class DropLabel(qt.QLabel): + """Label widget accepting drop of silx URLs""" - def __init__(self, parent=None, backend=None): - qt.QLabel.__init__(self) + DEFAULT_TEXT = "Drop an URL here to display information" + + def __init__(self, parent=None): + qt.QLabel.__init__(self, parent) self.setAcceptDrops(True) - self.setText("Drop something here") + 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"): @@ -88,46 +118,67 @@ class DropLabel(qt.QLabel): def dropEvent(self, event): byteString = event.mimeData().data("application/x-silx-uri") - silxUrl = byteString.data().decode("utf-8") - url = silx.io.url.DataUrl(silxUrl) - self.setText(url.path()) - - toolTipTemplate = ("<html><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>" - "</html>" - "</ul></html>" - ) - - toolTip = toolTipTemplate.format( - file_path=url.file_path(), - data_path=url.data_path(), - data_slice=url.data_slice(), - scheme=url.scheme()) - - self.setToolTip(toolTip) + url = silx.io.url.DataUrl(byteString.data().decode("utf-8")) + self.setUrl(url) event.acceptProposedAction() -class DropExample(qt.QMainWindow): +class DragLabel(qt.QLabel): + """Label widget providing a silx URL to drag""" - def __init__(self, parent=None): - super(DropExample, self).__init__(parent) + 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([]) - example = DropExample() - example.show() - app.exec_() + 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__": |