Python QImageReader.errorString方法代码示例

# 需要导入模块: from PyQt4.QtGui import QImageReader [as 别名]
# 或者: from PyQt4.QtGui.QImageReader import errorString [as 别名]
def image_meta_data(path):
    reader = QImageReader(path)
    if not reader.canRead():
        return ImgDataError(path, reader.error(), reader.errorString())

    img_format = reader.format()
    img_format = bytes(img_format).decode("ascii")
    size = reader.size()
    if not size.isValid():
        height = width = float("nan")
    else:
        height, width = size.height(), size.width()
    try:
        st_size = os.stat(path).st_size
    except OSError:
        st_size = -1

    return ImgData(path, img_format, height, width, st_size)

# 需要导入模块: from PyQt4.QtGui import QImageReader [as 别名]
# 或者: from PyQt4.QtGui.QImageReader import errorString [as 别名]
        def on_reply_ready(reply, future):
            nonlocal n_redir
            # schedule deferred delete to ensure the reply is closed
            # otherwise we will leak file/socket descriptors
            reply.deleteLater()
            future._reply = None
            if reply.error() == QNetworkReply.OperationCanceledError:
                # The network request was cancelled
                reply.close()
                future.cancel()
                return

            if reply.error() != QNetworkReply.NoError:
                # XXX Maybe convert the error into standard
                # http and urllib exceptions.
                future.set_exception(Exception(reply.errorString()))
                reply.close()
                return

            # Handle a possible redirection
            location = reply.attribute(
                QNetworkRequest.RedirectionTargetAttribute)

            if location is not None and n_redir < 1:
                n_redir += 1
                location = reply.url().resolved(location)
                # Retry the original request with a new url.
                request = QNetworkRequest(reply.request())
                request.setUrl(location)
                newreply = self._netmanager.get(request)
                future._reply = newreply
                newreply.finished.connect(
                    partial(on_reply_ready, newreply, future))
                reply.close()
                return

            reader = QImageReader(reply)
            image = reader.read()
            reply.close()

            if image.isNull():
                future.set_exception(Exception(reader.errorString()))
            else:
                future.set_result(image)

# 需要导入模块: from PyQt4.QtGui import QImageReader [as 别名]
# 或者: from PyQt4.QtGui.QImageReader import errorString [as 别名]
        def on_reply_ready(reply, future):
            nonlocal n_redir
            if reply.error() == QNetworkReply.OperationCanceledError:
                # The network request itself was canceled
                future.cancel()
                return

            if reply.error() != QNetworkReply.NoError:
                # XXX Maybe convert the error into standard
                # http and urllib exceptions.
                future.set_exception(Exception(reply.errorString()))
                return

            # Handle a possible redirection
            location = reply.attribute(
                QNetworkRequest.RedirectionTargetAttribute)

            if location is not None and n_redir < 1:
                n_redir += 1
                print(location)
                location = reply.url().resolved(location)
                # Retry the original request with a new url.
                request = QNetworkRequest(reply.request())
                request.setUrl(location)
                newreply = self._netmanager.get(request)
                future._reply = newreply
                newreply.finished.connect(
                    partial(on_reply_ready, newreply, future))
                return

            reader = QImageReader(reply)
            image = reader.read()

            if image.isNull():
                future.set_exception(Exception(reader.errorString()))
            else:
                future.set_result(image)

# 需要导入模块: from PyQt4.QtGui import QImageReader [as 别名]
# 或者: from PyQt4.QtGui.QImageReader import errorString [as 别名]
    def setupScene(self):
        self.error()
        if self.data:
            attr = self.stringAttrs[self.imageAttr]
            titleAttr = self.allAttrs[self.titleAttr]
            instances = [inst for inst in self.data
                         if numpy.isfinite(inst[attr])]
            assert self.thumbnailView.count() == 0
            size = QSizeF(self.imageSize, self.imageSize)

            for i, inst in enumerate(instances):
                url = self.urlFromValue(inst[attr])
                title = str(inst[titleAttr])

                thumbnail = GraphicsThumbnailWidget(QPixmap(), title=title)
                thumbnail.setThumbnailSize(size)
                thumbnail.setToolTip(url.toString())
                thumbnail.instance = inst
                self.thumbnailView.addThumbnail(thumbnail)

                if url.isValid() and url.isLocalFile():
                    reader = QImageReader(url.toLocalFile())
                    image = reader.read()
                    if image.isNull():
                        error = reader.errorString()
                        thumbnail.setToolTip(
                            thumbnail.toolTip() + "\n" + error)
                        self._errcount += 1
                    else:
                        pixmap = QPixmap.fromImage(image)
                        thumbnail.setPixmap(pixmap)
                        self._successcount += 1

                    future = Future()
                    future.set_result(image)
                    future._reply = None
                elif url.isValid():
                    future = self.loader.get(url)

                    @future.add_done_callback
                    def set_pixmap(future, thumb=thumbnail):
                        if future.cancelled():
                            return

                        assert future.done()

                        if future.exception():
                            # Should be some generic error image.
                            pixmap = QPixmap()
                            thumb.setToolTip(thumb.toolTip() + "\n" +
                                             str(future.exception()))
                        else:
                            pixmap = QPixmap.fromImage(future.result())

                        thumb.setPixmap(pixmap)

                        self._noteCompleted(future)
                else:
                    future = None

                self.items.append(_ImageItem(i, thumbnail, url, future))

            if any(it.future is not None and not it.future.done()
                   for it in self.items):
                self.info.setText("Retrieving...\n")
            else:
                self._updateStatus()