# coding: utf-8
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"""This module provides Plot3DAction related to input/output.
It provides QAction to copy, save (snapshot and video), print a Plot3DWidget.
"""
from __future__ import absolute_import, division
__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "06/09/2017"
import logging
import os
import numpy
from silx.gui import qt, printer
from silx.gui.icons import getQIcon
from .Plot3DAction import Plot3DAction
from ..utils import mng
from ...utils.image import convertQImageToArray
_logger = logging.getLogger(__name__)
[docs]class CopyAction(Plot3DAction):
"""QAction to provide copy of a Plot3DWidget
:param parent: See :class:`QAction`
:param ~silx.gui.plot3d.Plot3DWidget.Plot3DWidget plot3d:
Plot3DWidget the action is associated with
"""
def __init__(self, parent, plot3d=None):
super(CopyAction, self).__init__(parent, plot3d)
self.setIcon(getQIcon('edit-copy'))
self.setText('Copy')
self.setToolTip('Copy a snapshot of the 3D scene to the clipboard')
self.setCheckable(False)
self.setShortcut(qt.QKeySequence.Copy)
self.setShortcutContext(qt.Qt.WidgetShortcut)
self.triggered[bool].connect(self._triggered)
def _triggered(self, checked=False):
plot3d = self.getPlot3DWidget()
if plot3d is None:
_logger.error('Cannot copy widget, no associated Plot3DWidget')
else:
image = plot3d.grabGL()
qt.QApplication.clipboard().setImage(image)
[docs]class SaveAction(Plot3DAction):
"""QAction to provide save snapshot of a Plot3DWidget
:param parent: See :class:`QAction`
:param ~silx.gui.plot3d.Plot3DWidget.Plot3DWidget plot3d:
Plot3DWidget the action is associated with
"""
def __init__(self, parent, plot3d=None):
super(SaveAction, self).__init__(parent, plot3d)
self.setIcon(getQIcon('document-save'))
self.setText('Save...')
self.setToolTip('Save a snapshot of the 3D scene')
self.setCheckable(False)
self.setShortcut(qt.QKeySequence.Save)
self.setShortcutContext(qt.Qt.WidgetShortcut)
self.triggered[bool].connect(self._triggered)
def _triggered(self, checked=False):
plot3d = self.getPlot3DWidget()
if plot3d is None:
_logger.error('Cannot save widget, no associated Plot3DWidget')
else:
dialog = qt.QFileDialog(self.parent())
dialog.setWindowTitle('Save snapshot as')
dialog.setModal(True)
dialog.setNameFilters(('Plot3D Snapshot PNG (*.png)',
'Plot3D Snapshot JPEG (*.jpg)'))
dialog.setFileMode(qt.QFileDialog.AnyFile)
dialog.setAcceptMode(qt.QFileDialog.AcceptSave)
if not dialog.exec_():
return
nameFilter = dialog.selectedNameFilter()
filename = dialog.selectedFiles()[0]
dialog.close()
# Forces the filename extension to match the chosen filter
extension = nameFilter.split()[-1][2:-1]
if (len(filename) <= len(extension) or
filename[-len(extension):].lower() != extension.lower()):
filename += extension
image = plot3d.grabGL()
if not image.save(filename):
_logger.error('Failed to save image as %s', filename)
qt.QMessageBox.critical(
self.parent(),
'Save snapshot as',
'Failed to save snapshot')
[docs]class PrintAction(Plot3DAction):
"""QAction to provide printing of a Plot3DWidget
:param parent: See :class:`QAction`
:param ~silx.gui.plot3d.Plot3DWidget.Plot3DWidget plot3d:
Plot3DWidget the action is associated with
"""
def __init__(self, parent, plot3d=None):
super(PrintAction, self).__init__(parent, plot3d)
self.setIcon(getQIcon('document-print'))
self.setText('Print...')
self.setToolTip('Print a snapshot of the 3D scene')
self.setCheckable(False)
self.setShortcut(qt.QKeySequence.Print)
self.setShortcutContext(qt.Qt.WidgetShortcut)
self.triggered[bool].connect(self._triggered)
[docs] def getPrinter(self):
"""Return the QPrinter instance used for printing.
:rtype: QPrinter
"""
return printer.getDefaultPrinter()
def _triggered(self, checked=False):
plot3d = self.getPlot3DWidget()
if plot3d is None:
_logger.error('Cannot print widget, no associated Plot3DWidget')
else:
printer = self.getPrinter()
dialog = qt.QPrintDialog(printer, plot3d)
dialog.setWindowTitle('Print Plot3D snapshot')
if not dialog.exec_():
return
image = plot3d.grabGL()
# Draw pixmap with painter
painter = qt.QPainter()
if not painter.begin(printer):
return
if (printer.pageRect().width() < image.width() or
printer.pageRect().height() < image.height()):
# Downscale to page
xScale = printer.pageRect().width() / image.width()
yScale = printer.pageRect().height() / image.height()
scale = min(xScale, yScale)
else:
scale = 1.
rect = qt.QRectF(0,
0,
scale * image.width(),
scale * image.height())
painter.drawImage(rect, image)
painter.end()
[docs]class VideoAction(Plot3DAction):
"""This action triggers the recording of a video of the scene.
The scene is rotated 360 degrees around a vertical axis.
:param parent: Action parent see :class:`QAction`.
:param ~silx.gui.plot3d.Plot3DWidget.Plot3DWidget plot3d:
Plot3DWidget the action is associated with
"""
PNG_SERIE_FILTER = 'Serie of PNG files (*.png)'
MNG_FILTER = 'Multiple-image Network Graphics file (*.mng)'
def __init__(self, parent, plot3d=None):
super(VideoAction, self).__init__(parent, plot3d)
self.setText('Record video..')
self.setIcon(getQIcon('camera'))
self.setToolTip(
'Record a video of a 360 degrees rotation of the 3D scene.')
self.setCheckable(False)
self.triggered[bool].connect(self._triggered)
def _triggered(self, checked=False):
"""Action triggered callback"""
plot3d = self.getPlot3DWidget()
if plot3d is None:
_logger.warning(
'Ignoring action triggered without Plot3DWidget set')
return
dialog = qt.QFileDialog(parent=plot3d)
dialog.setWindowTitle('Save video as...')
dialog.setModal(True)
dialog.setNameFilters([self.PNG_SERIE_FILTER,
self.MNG_FILTER])
dialog.setFileMode(dialog.AnyFile)
dialog.setAcceptMode(dialog.AcceptSave)
if not dialog.exec_():
return
nameFilter = dialog.selectedNameFilter()
filename = dialog.selectedFiles()[0]
# Forces the filename extension to match the chosen filter
extension = nameFilter.split()[-1][2:-1]
if (len(filename) <= len(extension) or
filename[-len(extension):].lower() != extension.lower()):
filename += extension
nbFrames = int(4. * 25) # 4 seconds, 25 fps
if nameFilter == self.PNG_SERIE_FILTER:
self._saveAsPNGSerie(filename, nbFrames)
elif nameFilter == self.MNG_FILTER:
self._saveAsMNG(filename, nbFrames)
else:
_logger.error('Unsupported file filter: %s', nameFilter)
def _saveAsPNGSerie(self, filename, nbFrames):
"""Save video as serie of PNG files.
It adds a counter to the provided filename before the extension.
:param str filename: filename to use as template
:param int nbFrames: Number of frames to generate
"""
plot3d = self.getPlot3DWidget()
assert plot3d is not None
# Define filename template
nbDigits = int(numpy.log10(nbFrames)) + 1
indexFormat = '%%0%dd' % nbDigits
extensionIndex = filename.rfind('.')
filenameFormat = \
filename[:extensionIndex] + indexFormat + filename[extensionIndex:]
try:
for index, image in enumerate(self._video360(nbFrames)):
image.save(filenameFormat % index)
except GeneratorExit:
pass
def _saveAsMNG(self, filename, nbFrames):
"""Save video as MNG file.
:param str filename: filename to use
:param int nbFrames: Number of frames to generate
"""
plot3d = self.getPlot3DWidget()
assert plot3d is not None
frames = (convertQImageToArray(im) for im in self._video360(nbFrames))
try:
with open(filename, 'wb') as file_:
for chunk in mng.convert(frames, nb_images=nbFrames):
file_.write(chunk)
except GeneratorExit:
os.remove(filename) # Saving aborted, delete file
def _video360(self, nbFrames):
"""Run the video and provides the images
:param int nbFrames: The number of frames to generate for
:return: Iterator of QImage of the video sequence
"""
plot3d = self.getPlot3DWidget()
assert plot3d is not None
angleStep = 360. / nbFrames
# Create progress bar dialog
dialog = qt.QDialog(plot3d)
dialog.setWindowTitle('Record Video')
layout = qt.QVBoxLayout(dialog)
progress = qt.QProgressBar()
progress.setRange(0, nbFrames)
layout.addWidget(progress)
btnBox = qt.QDialogButtonBox(qt.QDialogButtonBox.Abort)
btnBox.rejected.connect(dialog.reject)
layout.addWidget(btnBox)
dialog.setModal(True)
dialog.show()
qapp = qt.QApplication.instance()
for frame in range(nbFrames):
progress.setValue(frame)
image = plot3d.grabGL()
yield image
plot3d.viewport.orbitCamera('left', angleStep)
qapp.processEvents()
if not dialog.isVisible():
break # It as been rejected by the abort button
else:
dialog.accept()
if dialog.result() == qt.QDialog.Rejected:
raise GeneratorExit('Aborted')
