def initController(self):
temp_dir = TemporaryDirectory.get()
self.latex2image_converter = Converter(temp_dir)
self.latex2image_converter.convertedSignal.connect(
self.previewGenerated)
self.latex2image_converter.conversionAbortedSignal.connect(
self.conversionAborted)
def initController(self): temp_dir = TemporaryDirectory.get() self.latex2image_converter = Converter(temp_dir) self.latex2image_converter.convertedSignal.connect(self.previewGenerated) self.latex2image_converter.conversionAbortedSignal.connect(self.conversionAborted)
class PreviewController(QObject): """ The preview controller converts when necessary or requested the document source to an image displayed in the preview view. """ willUpdatePreviewSignal = pyqtSignal() errorsInSourceSignal = pyqtSignal(list, str) logsSignal = pyqtSignal(str) def __init__(self): super(PreviewController, self).__init__() self.app_controller = None self.doc_controller = None self.preview_view = None self.latex2image_converter = None self.request_preview_update = False self.last_time_content_changed = datetime.now() def initController(self): temp_dir = TemporaryDirectory.get() self.latex2image_converter = Converter(temp_dir) self.latex2image_converter.convertedSignal.connect(self.previewGenerated) self.latex2image_converter.conversionAbortedSignal.connect(self.conversionAborted) @pyqtSlot(str) def documentContentChanged(self, content): self.last_time_content_changed = datetime.now() self.preview_view.showWaitingBackground() if not self.request_preview_update: self.requestPreviewUpdate() @pyqtSlot() def conversionAborted(self): self.preview_view.showErrorBackground() def requestPreviewUpdate(self): if self._isEndOfInstruction(): self.updatePreview() elif Preferences.getAutoPreview(): self.updatePreviewAfterTypingPause() else: self.request_preview_update = False def _isEndOfInstruction(self): """ Returns whether the last typed character is a semi-colon, meaning the end of current TikZ instruction """ return (self.doc_controller.view.content_view.current_editor_view.getCharacterAtCurrentCursorPosition() == ";") def updatePreviewAfterTypingPause(self): """ Updates the preview when the user is making a pause while typing. """ preview_threshold = Preferences.getPreviewThreshold() time_delta = datetime.now() - self.last_time_content_changed elapsed_ms = time_delta.seconds * 1000 + time_delta.microseconds / 1000 if elapsed_ms >= preview_threshold: self.updatePreview() else: wait_for = max(100, Preferences.getPreviewThreshold() / 2) QTimer.singleShot(wait_for, self.updatePreviewAfterTypingPause) def updatePreview(self): self.request_preview_update = False doc = self.doc_controller.model template = Preferences.getPreviewTemplate() source = documentIO.buildFileContentFromDocument(template, doc) self.latex2image_converter.convertLatexToImage(source) def abortPreview(self): self.latex2image_converter.stopConversion() @pyqtSlot(LatexToImageConversion) def previewGenerated(self, conversion): self.willUpdatePreviewSignal.emit() if conversion.image_path: self.preview_view.figure = conversion.image_path self.preview_view.showNormalBackground() self.logsSignal.emit(conversion.logs) self.errorsInSourceSignal.emit(conversion.errors, conversion.source)
class PreviewController(QObject):
"""
The preview controller converts when necessary or requested the document source to an
image displayed in the preview view.
"""
willUpdatePreviewSignal = pyqtSignal()
errorsInSourceSignal = pyqtSignal(list, str)
logsSignal = pyqtSignal(str)
def __init__(self):
super(PreviewController, self).__init__()
self.app_controller = None
self.doc_controller = None
self.preview_view = None
self.latex2image_converter = None
self.request_preview_update = False
self.last_time_content_changed = datetime.now()
def initController(self):
temp_dir = TemporaryDirectory.get()
self.latex2image_converter = Converter(temp_dir)
self.latex2image_converter.convertedSignal.connect(
self.previewGenerated)
self.latex2image_converter.conversionAbortedSignal.connect(
self.conversionAborted)
@pyqtSlot(str)
def documentContentChanged(self, content):
self.last_time_content_changed = datetime.now()
self.preview_view.showWaitingBackground()
if not self.request_preview_update:
self.requestPreviewUpdate()
@pyqtSlot()
def conversionAborted(self):
self.preview_view.showErrorBackground()
def requestPreviewUpdate(self):
if self._isEndOfInstruction():
self.updatePreview()
elif Preferences.getAutoPreview():
self.updatePreviewAfterTypingPause()
else:
self.request_preview_update = False
def _isEndOfInstruction(self):
"""
Returns whether the last typed character is a semi-colon, meaning the
end of current TikZ instruction
"""
return (self.doc_controller.view.content_view.current_editor_view.
getCharacterAtCurrentCursorPosition() == ";")
def updatePreviewAfterTypingPause(self):
"""
Updates the preview when the user is making a pause while typing.
"""
preview_threshold = Preferences.getPreviewThreshold()
time_delta = datetime.now() - self.last_time_content_changed
elapsed_ms = time_delta.seconds * 1000 + time_delta.microseconds / 1000
if elapsed_ms >= preview_threshold:
self.updatePreview()
else:
wait_for = max(100, Preferences.getPreviewThreshold() / 2)
QTimer.singleShot(wait_for, self.updatePreviewAfterTypingPause)
def updatePreview(self):
self.request_preview_update = False
doc = self.doc_controller.model
template = Preferences.getPreviewTemplate()
source = documentIO.buildFileContentFromDocument(template, doc)
self.latex2image_converter.convertLatexToImage(source)
def abortPreview(self):
self.latex2image_converter.stopConversion()
@pyqtSlot(LatexToImageConversion)
def previewGenerated(self, conversion):
self.willUpdatePreviewSignal.emit()
if conversion.image_path:
self.preview_view.figure = conversion.image_path
self.preview_view.showNormalBackground()
self.logsSignal.emit(conversion.logs)
self.errorsInSourceSignal.emit(conversion.errors, conversion.source)
