1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
import sys
from contextlib import contextmanager
from qgis.core import QgsApplication
@contextmanager
def qgisapp(args=None, guienabled=True, configpath=None, sysexit=True):
"""
Create a new QGIS Qt application.
You should use this before creating any Qt widgets or QGIS objects for
your custom QGIS based application.
usage:
from qgis.core.contextmanagers import qgisapp
def main(app):
# Run your main code block
with qgisapp(sys.argv) as app:
main(app)
args - args passed to the underlying QApplication.
guienabled - True by default will create a QApplication with a GUI. Pass
False if you wish to create no GUI based app, e.g a server app.
configpath - Custom config path QGIS will use to load settings.
sysexit - Call sys.exit on app exit. True by default.
"""
if not args:
args = []
app = QgsApplication(args, guienabled, configpath)
QgsApplication.initQgis()
yield app
if guienabled:
exitcode = app.exec_()
else:
exitcode = 0
QgsApplication.exitQgis()
if sysexit:
sys.exit(exitcode)
|
