from enigma import *
import time
+import sys
# some helper classes first:
class HTMLComponent:
return res
class GUISkin:
- data = { }
+ def __init__(self):
+ self.data = { }
+
def createGUIScreen(self, parent):
for (name, val) in self.items():
self.data[name] = { }
- val.GUIcreate(self.data[name], parent, None)
+ if isinstance(val, GUIComponent):
+ val.GUIcreate(self.data[name], parent, None)
+
+ def deleteGUIScreen(self):
+ for (name, val) in self.items():
+ if isinstance(val, GUIComponent):
+ w = self.data[name]["instance"]
+ val.GUIdelete(self.data[name])
+ try:
+ val.fix()
+ except:
+ pass
+ del self.data[name]
+
+ # note: you'll probably run into this assert. if this happens, don't panic!
+ # yes, it's evil. I told you that programming in python is just fun, and
+ # suddently, you have to care about things you don't even know.
+ #
+ # but calm down, the solution is easy, at least on paper:
+ #
+ # Each Component, which is a GUIComponent, owns references to each
+ # instantiated eWidget (namely in screen.data[name]["instance"], in case
+ # you care.)
+ # on deleteGUIscreen, all eWidget *must* (!) be deleted (otherwise,
+ # well, problems appear. I don't want to go into details too much,
+ # but this would be a memory leak anyway.)
+ # The assert beyond checks for that. It asserts that the corresponding
+ # eWidget is about to be removed (i.e., that the refcount becomes 0 after
+ # running deleteGUIscreen).
+ # (You might wonder why the refcount is checked for 2 and not for 1 or 0 -
+ # one reference is still hold by the local variable 'w', another one is
+ # hold be the function argument to sys.getrefcount itself. So only if it's
+ # 2 at this point, the object will be destroyed after leaving deleteGUIscreen.)
+ #
+ # Now, how to fix this problem? You're holding a reference somewhere. (References
+ # can only be hold from Python, as eWidget itself isn't related to the c++
+ # way of having refcounted objects. So it must be in python.)
+ #
+ # It could be possible that you're calling deleteGUIscreen trough a call of
+ # a PSignal. For example, you could try to call screen.doClose() in response
+ # to a Button::click. This will fail. (It wouldn't work anyway, as you would
+ # remove a dialog while running it. It never worked - enigma1 just set a
+ # per-mainloop variable on eWidget::close() to leave the exec()...)
+ # That's why Session supports delayed closes. Just call Session.close() and
+ # it will work.
+ #
+ # Another reason is that you just stored the data["instance"] somewhere. or
+ # added it into a notifier list and didn't removed it.
+ #
+ # If you can't help yourself, just ask me. I'll be glad to help you out.
+ # Sorry for not keeping this code foolproof. I really wanted to archive
+ # that, but here I failed miserably. All I could do was to add this assert.
+ assert sys.getrefcount(w) == 2, "too many refs hold to " + str(w)
+
+ def close(self):
+ self.deleteGUIScreen()
+ del self.data
+
+# note: components can be used in multiple screens, so we have kind of
+# two contexts: first the per-component one (self), then the per-screen (i.e.:
+# per eWidget one), called "priv". In "priv", for example, the instance
+# of the eWidget is stored.
+
+# GUI components have a "notifier list" of associated eWidgets to one component
+# (as said - one component instance can be used at multiple screens)
class GUIComponent:
""" GUI component """
def GUIcreate(self, priv, parent, skindata):
i = self.GUIcreateInstance(self, parent, skindata)
priv["instance"] = i
- print str(self) + " notifier list before " + str(self.notifier)
self.notifier.append(i)
- print str(self) + " notifier list now " + str(self.notifier)
- if self.notifierAdded:
+ try:
self.notifierAdded(i)
+ except:
+ pass
+
+ # GUIdelete must delete *all* references to the current component!
+ def GUIdelete(self, priv):
+ g = priv["instance"]
+ self.notifier.remove(g)
+ self.GUIdeleteInstance(g)
+ del priv["instance"]
+
+ def GUIdeleteInstance(self, priv):
+ pass
class VariableText:
"""VariableText can be used for components which have a variable text, based on any widget with setText call"""
def setText(self, text):
if self.message != text:
self.message = text
- print self.notifier
for x in self.notifier:
x.setText(self.message)
VariableText.__init__(self)
GUIComponent.__init__(self)
self.doClock()
+
+ self.clockTimer = eTimer()
+ self.clockTimer.timeout.get().append(self.doClock)
+ self.clockTimer.start(1000)
# "funktionalitaet"
def doClock(self):
return self.getText()
class Button(HTMLComponent, GUIComponent, VariableText):
- onClick = {}
-
- def __init__(self, text=""):
+ def __init__(self, text="", onClick = [ ]):
GUIComponent.__init__(self)
VariableText.__init__(self)
self.setText(text)
+ self.onClick = onClick
- def click(self):
+ def push(self):
for x in self.onClick:
x()
+ return 0
+
+ def disable(self):
+ pass
+
+ def enable(self):
+ pass
-# html:
+# html:
def produceHTML(self):
return "<input type=\"submit\" text=\"" + self.getText() + "\">\n"
# GUI:
def GUIcreateInstance(self, priv, parent, skindata):
g = eButton(parent)
-# g.clicked = [ self.click ]
+ g.selected.get().append(self.push)
+ return g
+
+ def GUIdeleteInstance(self, g):
+ g.selected.get().remove(self.push)
+
+class Label(HTMLComponent, GUIComponent, VariableText):
+ def __init__(self, text=""):
+ GUIComponent.__init__(self)
+ VariableText.__init__(self)
+ self.setText(text)
+
+# html:
+ def produceHTML(self):
+ return self.getText()
+
+# GUI:
+ def GUIcreateInstance(self, priv, parent, skindata):
+ g = eLabel(parent)
return g
class Header(HTMLComponent, GUIComponent, VariableText):
g.setRange(0, 100)
return g
+# a general purpose progress bar
+class ProgressBar(HTMLComponent, GUIComponent, VariableValue):
+ def __init__(self):
+ GUIComponent.__init__(self)
+ VariableValue.__init__(self)
+
+ def GUIcreateInstance(self, priv, parent, skindata):
+ g = eSlider(parent)
+ g.setRange(0, 100)
+ return g
+
+class MenuList(HTMLComponent, GUIComponent):
+ def __init__(self, list):
+ GUIComponent.__init__(self)
+ self.l = eListboxPythonStringContent()
+ self.l.setList(list)
+
+ def getCurrent(self):
+ return self.l.getCurrentSelection()
+
+ def GUIcreateInstance(self, priv, parent, skindata):
+ g = eListbox(parent)
+ g.setContent(self.l)
+ return g
+
+ def GUIdeleteInstance(self, g):
+ g.setContent(None)
+
+class ServiceList(HTMLComponent, GUIComponent):
+ def __init__(self):
+ GUIComponent.__init__(self)
+ self.l = eListboxServiceContent()
+
+ def GUIcreateInstance(self, priv, parent, skindata):
+ g = eListbox(parent)
+ g.setContent(self.l)
+ return g
+
+ def GUIdeleteInstance(self, g):
+ g.setContent(None)
+
+ def setRoot(self, root):
+ self.l.setRoot(root)
+
+class ServiceScan:
+
+ Idle = 1
+ Running = 2
+ Done = 3
+ Error = 4
+
+ def scanStatusChanged(self):
+ if self.state == self.Running:
+ self.progressbar.setValue(self.scan.getProgress())
+ if self.scan.isDone():
+ self.state = self.Done
+ else:
+ self.text.setText("scan in progress - %d %% done!\n%d services found!" % (self.scan.getProgress(), self.scan.getNumServices()))
+
+ if self.state == self.Done:
+ self.text.setText("scan done!")
+
+ if self.state == self.Error:
+ self.text.setText("ERROR - failed to scan!")
+
+ def __init__(self, progressbar, text):
+ self.progressbar = progressbar
+ self.text = text
+ self.scan = eComponentScan()
+ if self.scan.start():
+ self.state = self.Error
+ else:
+ self.state = self.Running
+ self.scan.statusChanged.get().append(self.scanStatusChanged)
+ self.scanStatusChanged()
+
+ def isDone(self):
+ return self.state == self.Done
+
+ def fix(self):
+ self.scan.statusChanged.get().remove(self.scanStatusChanged)
+
\ No newline at end of file