[Matplotlib-devel] QtQuick backend development

Jovan_Mitrevski · May 3, 2020, 6:51pm

Hi,

For a project I am working on I created an updated QtQuick backend, originally starting from the old matplotlib_qtquick_playground. The current version largely consists of:

github.com

jmitrevs/matplotlib/blob/qtquick5/lib/matplotlib/backends/backend_qtquick.py

import os
import traceback

import matplotlib

from matplotlib import cbook
from matplotlib.backend_bases import (
    FigureCanvasBase, NavigationToolbar2,
    MouseButton)
from matplotlib.figure import Figure
from matplotlib.backends.backend_qt5 import (
    TimerQT, SPECIAL_KEYS, MODIFIER_KEYS, cursord)
from .qt_compat import (
    QtCore, QtGui, QtQuick, QtWidgets)


class FigureCanvasQtQuick(QtQuick.QQuickPaintedItem, FigureCanvasBase):
    """ This class creates a QtQuick Item encapsulating a Matplotlib
        Figure and all the functions to interact with the 'standard'
        Matplotlib navigation toolbar.

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github.com

jmitrevs/matplotlib/blob/qtquick5/lib/matplotlib/backends/backend_qtquickagg.py

"""
Render to qtquick from agg.
"""

import numpy as np
from matplotlib.backends.backend_agg import FigureCanvasAgg
from .backend_qtquick import (
    QtCore, QtGui, FigureCanvasQtQuick)


class FigureCanvasQtQuickAgg(FigureCanvasAgg, FigureCanvasQtQuick):
    """ This class customizes the FigureCanvasQtQuick for Agg
    """
    def __init__(self, figure=None, parent=None):
        super().__init__(figure=figure, parent=parent)
        self.blitbox = None

    def paint(self, p):
        """
        Copy the image from the Agg canvas to the qt.drawable.

This file has been truncated. show original

and some minor changes, for example in qt_compat.py and such. At the moment it doesn't work as a backend you can select and have a window open, since I only use it from inside a QtQuick-based application.

Is there interest in me trying to get this in shape for inclusion in matplotlib, or should I continue keeping it separate for my own use only?

Jovan

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