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authorkali <kali@leap.se>2013-02-15 09:31:51 +0900
committerkali <kali@leap.se>2013-02-15 09:31:51 +0900
commit9cea9c8a34343f8792d65b96f93ae22bd8685878 (patch)
tree9f512367b1d47ced5614702a00f3ff0a8fe746d7 /src/leap/gui/utils.py
parent7159734ec6c0b76fc7f3737134cd22fdaaaa7d58 (diff)
parent1032e07a50c8bb265ff9bd31b3bb00e83ddb451e (diff)
Merge branch 'release/v0.2.0'
Conflicts: README.txt
Diffstat (limited to 'src/leap/gui/utils.py')
-rw-r--r--src/leap/gui/utils.py34
1 files changed, 34 insertions, 0 deletions
diff --git a/src/leap/gui/utils.py b/src/leap/gui/utils.py
new file mode 100644
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+++ b/src/leap/gui/utils.py
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+"""
+utility functions to work with gui objects
+"""
+from PyQt4 import QtCore
+
+
+def layout_widgets(layout):
+ """
+ return a generator with all widgets in a layout
+ """
+ return (layout.itemAt(i) for i in range(layout.count()))
+
+
+DELAY_MSECS = 50
+
+
+def delay(obj, method_str=None, call_args=None):
+ """
+ Triggers a function or slot with a small delay.
+ this is a mainly a hack to get responsiveness in the ui
+ in cases in which the event loop freezes and the task
+ is not heavy enough to setup a processing queue.
+ """
+ if callable(obj) and not method_str:
+ fun = lambda: obj()
+
+ if method_str:
+ invoke = QtCore.QMetaObject.invokeMethod
+ if call_args:
+ fun = lambda: invoke(obj, method_str, call_args)
+ else:
+ fun = lambda: invoke(obj, method_str)
+
+ QtCore.QTimer().singleShot(DELAY_MSECS, fun)