62 lines
1.8 KiB
Python
62 lines
1.8 KiB
Python
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# coding=utf-8
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"""Common functionality used by regression tests."""
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import sys
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import logging
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LOGGER = logging.getLogger('QGIS')
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QGIS_APP = None # Static variable used to hold hand to running QGIS app
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CANVAS = None
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PARENT = None
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IFACE = None
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def get_qgis_app():
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""" Start one QGIS application to test against.
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:returns: Handle to QGIS app, canvas, iface and parent. If there are any
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errors the tuple members will be returned as None.
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:rtype: (QgsApplication, CANVAS, IFACE, PARENT)
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If QGIS is already running the handle to that app will be returned.
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"""
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try:
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from qgis.PyQt import QtGui, QtCore
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from qgis.core import QgsApplication
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from qgis.gui import QgsMapCanvas
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from .qgis_interface import QgisInterface
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except ImportError:
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return None, None, None, None
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global QGIS_APP # pylint: disable=W0603
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if QGIS_APP is None:
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gui_flag = True # All test will run qgis in gui mode
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#noinspection PyPep8Naming
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QGIS_APP = QgsApplication(sys.argv, gui_flag)
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# Make sure QGIS_PREFIX_PATH is set in your env if needed!
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QGIS_APP.initQgis()
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s = QGIS_APP.showSettings()
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LOGGER.debug(s)
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global PARENT # pylint: disable=W0603
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if PARENT is None:
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#noinspection PyPep8Naming
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PARENT = QtGui.QWidget()
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global CANVAS # pylint: disable=W0603
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if CANVAS is None:
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#noinspection PyPep8Naming
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CANVAS = QgsMapCanvas(PARENT)
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CANVAS.resize(QtCore.QSize(400, 400))
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global IFACE # pylint: disable=W0603
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if IFACE is None:
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# QgisInterface is a stub implementation of the QGIS plugin interface
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#noinspection PyPep8Naming
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IFACE = QgisInterface(CANVAS)
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return QGIS_APP, CANVAS, IFACE, PARENT
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