utils: Qt helpers#
Miscellaneous helpers for Qt
concurrent#
This module allows to run a function in Qt main thread from another thread
- submitToQtMainThread(fn, *args, **kwargs)[source]#
Run fn(args, kwargs) in Qt’s main thread.
If not called from the main thread, this is run asynchronously.
- Parameters:
fn (callable) – Function to call in main thread.
- Returns:
A future object to retrieve the result
- Return type:
concurrent.future.Future
image#
This module provides conversions between numpy.ndarray and QImage
- convertArrayToQImage(array)[source]#
Convert an array-like image to a QImage.
The created QImage is using a copy of the array data.
Limitation: Only RGB or RGBA images with 8 bits per channel are supported.
- Parameters:
array (numpy.ndarray of uint8) – Array-like image data of shape (height, width, channels) Channels are expected to be either RGB or RGBA.
- Return type:
QImage- Returns:
Corresponding Qt image with RGB888 or ARGB32 format.
- convertQImageToArray(image)[source]#
Convert a QImage to a numpy array.
If QImage format is not one of:
Format_Grayscale8
Format_RGB888
Format_RGBA8888
Format_ARGB32,
it is first converted to one of this format.
The created numpy array is using a copy of the QImage data.
- Parameters:
image (
QImage) – The QImage to convert.image
- Return type:
ndarray- Returns:
Image array of uint8 of shape:
(height, width) for grayscale images
(height, width, channels (3 or 4)) for RGB and RGBA images