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# -*- coding: utf-8 -*-
"""Contains Windows Taskbar related functionality.
Unfortunatelly the newly implemented `ctypes` interface is not working. From what I
learned during my research is that the `comtypes` interface is able to support the
`IUnkwown*` (or "early-binding") interfaces. That may not be the main reason. But, if
it was working before let's not break it and keep the old code.
Here is the code for future reference:
.. code-block:: python
import ctypes
from ctypes import wintypes
# Constants for taskbar progress states
TBPF_NOPROGRESS = 0
TBPF_INDETERMINATE = 0x1
TBPF_NORMAL = 0x2
TBPF_ERROR = 0x4
TBPF_PAUSED = 0x8
# Define the ITaskbarList3 interface
class ITaskbarList3(ctypes.Structure):
_fields_ = [
("SetProgressValue", ctypes.c_void_p),
("SetProgressState", ctypes.c_void_p),
# Add other methods if needed
]
# Load the Shell32.dll and get the ITaskbarList3 interface
shell32 = ctypes.windll.shell32
ITaskbarList3_ptr = ctypes.POINTER(ITaskbarList3)
CoCreateInstance = ctypes.windll.ole32.CoCreateInstance
CLSID_TaskbarList = ctypes.c_char_p(b"{56FDF344-FD6D-11d0-958A-006097C9A090}")
IID_ITaskbarList3 = ctypes.c_char_p(b"{EA1AFB91-9E28-4B86-90E9-9E9F8A5EEFAF}")
class Taskbar:
def __init__(self, frame, maxv=100):
self.frame = frame
self.maxv = maxv
self.taskbar = self._create_taskbar_instance()
def _create_taskbar_instance(self):
taskbar = ITaskbarList3_ptr()
hr = CoCreateInstance(
ctypes.byref(ctypes.c_void_p(CLSID_TaskbarList)),
None,
1, # CLSCTX_INPROC_SERVER
ctypes.byref(IID_ITaskbarList3),
ctypes.byref(taskbar),
)
if hr != 0:
raise ctypes.WinError(hr)
return taskbar
def set_progress_value(self, value):
if self.frame:
hwnd = self.frame.GetHandle()
self.taskbar.contents.SetProgressValue(hwnd, value, self.maxv)
def set_progress_state(self, state):
if self.frame:
hwnd = self.frame.GetHandle()
self.taskbar.contents.SetProgressState(hwnd, state)
"""
import comtypes.gen.TaskbarLib as tbl
import comtypes.client as cc
TBPF_NOPROGRESS = 0
TBPF_INDETERMINATE = 0x1
TBPF_NORMAL = 0x2
TBPF_ERROR = 0x4
TBPF_PAUSED = 0x8
taskbar = cc.CreateObject(
"{56FDF344-FD6D-11d0-958A-006097C9A090}", interface=tbl.ITaskbarList3
)
taskbar.HrInit()
class Taskbar:
def __init__(self, frame, maxv=100):
self.frame = frame
self.maxv = maxv
def set_progress_value(self, value):
if self.frame:
taskbar.SetProgressValue(self.frame.GetHandle(), value, self.maxv)
def set_progress_state(self, state):
if self.frame:
taskbar.SetProgressState(self.frame.GetHandle(), state)
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