Các công việc sau đây:
- Tạo 2 tệp: mylauncher.desktop và mylauncher.py với nội dung như được đưa ra dưới đây.
- Làm cho mylauncher.desktop thực thi.
- Thêm mylauncher.desktop vào launcher của unity.
- Chỉnh sửa tên thư mục và thư mục trong mylauncher.py nếu cần.
- Chạy
python mylauncher.pytrong nền. Bạn sẽ phải thêm phần này vào một trong các kịch bản khởi nghiệp của bạn.
Nguồn: https://wiki.ubfox.com/Unity/LauncherAPI
Nội dung của mylauncher.desktop:
[Desktop Entry]
Name=My Launcher
Comment=A,B,C if A else D,E,F
Exec=nautilus %U
Icon=nautilus
Terminal=false
StartupNotify=true
Type=Application
OnlyShowIn=GNOME;Unity;
Actions=;
Nội dung của mylauncher.py:
updateinterval = 1 #Update interval in seconds. Set it to a +ve integer.
#In Foldernames and Folderlocations, spaces shouldn't be preceded by \.
Foldernames = ["A", "B", "C", "D", "E", "F"]
Folderlocations = ["/home/prasanth/A", "/home/prasanth/B", "/home/prasanth/C", "/home/prasanth/D", "/home/prasanth/E", "/home/prasanth/F"]
#####################################
from gi.repository import Unity, Gio, GObject, Dbusmenu
import os, subprocess
def nautilusopen(junk1, junk2, location): #Function that opens `location` in nautilus. Equivalent to `nautilus location` in bash.
subprocess.Popen(['nautilus', "%s" % location])
launcher = Unity.LauncherEntry.get_for_desktop_id("mylauncher.desktop") #You won't have to modify this, except if you rename `mylauncher.desktop`
#Code block A: This code block builds 6 quicklist entries, 3 for when A is found and 3 for when it isn't
QLentries = [Dbusmenu.Menuitem.new() for i in Foldernames]
for i in xrange(6):
QLentries[i].property_set(Dbusmenu.MENUITEM_PROP_LABEL, "Goto %s" % Foldernames[i])
QLentries[i].connect("item-activated", nautilusopen, Folderlocations[i])
QLentries[i].property_set_bool(Dbusmenu.MENUITEM_PROP_VISIBLE, True)
################
#Code block B: This code block creates 2 quicklists 1 for when A is found and 1 for when it isn't. Then it adds the first 3 quicklist entries to QLifA and the next 3 to QLifnotA
QLifA = Dbusmenu.Menuitem.new() #Quicklist if A is found
QLifnotA = Dbusmenu.Menuitem.new() #Quicklist if A is not found.
for i in xrange(3):
QLifA.child_append(QLentries[i])
for i in xrange(3, 6):
QLifnotA.child_append(QLentries[i])
################
#The rest of the code simply monitors the file system for A's existence and switches appropriately between QLifA and QLifnotA
prevState = None
def updateql():
global prevState
currentState = 'A' if os.path.exists(Folderlocations[0]) else 'notA' #currentState is 'A' if Folderlocations[0] (which is /home/prasanth/A) exists, 'notA' otherwise
if currentState != prevState:
if currentState == 'A':
launcher.set_property("quicklist", QLifA)
else:
launcher.set_property("quicklist", QLifnotA)
prevState = currentState
return True
#GObject.timeout_add_seconds(updateinterval, updateql)
#mainloop = GObject.MainLoop()
#mainloop.run()
#If the 3-line commented block above worked as expected, the remainder of this script would be unnecessary. Unfortunately, it doesn't.
import signal
def alarmhandler(signum, frame):
raise Exception('Alarm has rung')
signal.signal(signal.SIGALRM, alarmhandler)
mainloop = GObject.MainLoop()
while True:
try:
updateql()
signal.alarm(updateinterval)
mainloop.run()
except KeyboardInterrupt:
continue
EDIT: Sử dụng thông tin sau đây dưới dạng mylauncher.py cho mục đích được đề cập trong các bình luận. Sửa đổi cho phù hợp với nhu cầu của bạn nên được chuyển thẳng và trong trường hợp không đề cập đến nó trong các bình luận.
from gi.repository import Unity, Gio, GObject, Dbusmenu
import os, subprocess
updateinterval = 1 #Update interval in seconds. Set it to a +ve integer.
#Quicklist entries if already mounted:
ifMountedEntry1text = """Unmount A""" #Text shown in the quicklist menu for this entry.
ifMountedEntry1command = """unmount A""" #Bash command to execute when entry 1 is clicked. Doubt if `unmount A` will work. Modify appropriately.
ifMountedEntry2text = """Open A""" #Maybe you'll want to open A directly from the launcher. Included just so you get a hang of how this works.
ifMountedEntry2command = """nautilus A"""
#Extend as required.
#Quicklist entries if not already mounted:
ifnotMountedEntry1text = """Mount A"""
ifnotMountedEntry1command = """mount A""" #Again modify `mount A` appropriately.
#Extend as required.
#My old file monitoring should work. But in case you want to change the criteria for modifying quicklists, it is better to do the following:
filemonitoringcommand = """if [ -d /folder/to/monitor/ ]; then echo True; else echo False; fi;""" #<Bash command>/<location to script> which prints 'True' if A is mounted, 'False' otherwise.
#####################
def systemcall(junk1, junk2, command):
os.system(command)
launcher = Unity.LauncherEntry.get_for_desktop_id("mylauncher.desktop") #You won't have to modify this, except if you rename `mylauncher.desktop`
#Quicklist if already mounted:
QLifMounted = Dbusmenu.Menuitem.new()
ifMountedEntry1 = Dbusmenu.Menuitem.new()
ifMountedEntry1.property_set(Dbusmenu.MENUITEM_PROP_LABEL, ifMountedEntry1text) #Sets the text shown in the quicklist menu for this entry.
ifMountedEntry1.connect("item-activated", systemcall, ifMountedEntry1command) #Sets the corresponding bash command.
ifMountedEntry1.property_set_bool(Dbusmenu.MENUITEM_PROP_VISIBLE, True)
QLifMounted.child_append(ifMountedEntry1) #Adds the first entry to the quicklist
ifMountedEntry2 = Dbusmenu.Menuitem.new()
ifMountedEntry2.property_set(Dbusmenu.MENUITEM_PROP_LABEL, ifMountedEntry2text)
ifMountedEntry2.connect("item-activated", systemcall, ifMountedEntry2command)
ifMountedEntry2.property_set_bool(Dbusmenu.MENUITEM_PROP_VISIBLE, True)
QLifMounted.child_append(ifMountedEntry2)
#Extend as required.
#Quicklist if not already mounted:
QLifnotMounted = Dbusmenu.Menuitem.new()
ifnotMountedEntry1 = Dbusmenu.Menuitem.new()
ifnotMountedEntry1.property_set(Dbusmenu.MENUITEM_PROP_LABEL, ifnotMountedEntry1text)
ifnotMountedEntry1.connect("item-activated", systemcall, ifnotMountedEntry1command)
ifnotMountedEntry1.property_set_bool(Dbusmenu.MENUITEM_PROP_VISIBLE, True)
QLifnotMounted.child_append(ifnotMountedEntry1)
#Extend as required.
#The rest of the code uses `filemonitoringcommand` to monitor the filesystem and dynamically modifies (or rather switches between) quicklists.
prevState = None
def updateql():
global prevState
currentState = 'True' in os.popen(filemonitoringcommand).read()
if currentState != prevState:
if currentState == True:
launcher.set_property("quicklist", QLifMounted) #If already mounted, sets QLifMounted as the quicklist.
else:
launcher.set_property("quicklist", QLifnotMounted) #Otherwise sets QLifnotMounted as the quicklist.
prevState = currentState
return True
#GObject.timeout_add_seconds(updateinterval, updateql)
#mainloop = GObject.MainLoop()
#mainloop.run()
#If the 3-line commented block above worked as expected, the remainder of this script would be unnecessary. Unfortunately, it doesn't.
import signal
def alarmhandler(signum, frame):
raise Exception('Alarm has rung')
signal.signal(signal.SIGALRM, alarmhandler)
mainloop = GObject.MainLoop()
while True:
try:
updateql()
signal.alarm(updateinterval)
mainloop.run()
except KeyboardInterrupt:
continue