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
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
from qtpy import QtCore
from qtpy import QtGui
from qtpy import QtWidgets
from qtpy.QtCore import Qt
try:
from qtpy import PYQT4
except ImportError:
PYQT4 = False
from . import hotkeys
def patch(obj, attr, value):
if not hasattr(obj, attr):
setattr(obj, attr, value)
def install():
patch(QtWidgets.QGraphicsItem, 'mapRectToScene', _map_rect_to_scene)
patch(QtGui.QKeySequence, 'Preferences', hotkeys.PREFERENCES)
def add_search_path(prefix, path):
if hasattr(QtCore.QDir, 'addSearchPath'):
QtCore.QDir.addSearchPath(prefix, path)
def set_common_dock_options(window):
if not hasattr(window, 'setDockOptions'):
return
nested = QtWidgets.QMainWindow.AllowNestedDocks
tabbed = QtWidgets.QMainWindow.AllowTabbedDocks
animated = QtWidgets.QMainWindow.AnimatedDocks
window.setDockOptions(nested | tabbed | animated)
def _map_rect_to_scene(self, rect):
"""Only available in newer PyQt4 versions"""
return self.sceneTransform().mapRect(rect)
def wheel_translation(event):
"""Return the (Tx, Ty) translation delta for a pan"""
if PYQT4:
tx = event.delta()
ty = 0.0
if event.orientation() == Qt.Vertical:
(tx, ty) = (ty, tx)
else:
angle = event.angleDelta()
tx = angle.x()
ty = angle.y()
return (tx, ty)
def wheel_delta(event):
"""Return a single wheel delta"""
if PYQT4:
delta = event.delta()
else:
angle = event.angleDelta()
x = angle.x()
y = angle.y()
if abs(x) > abs(y):
delta = x
else:
delta = y
return delta
|
