private Standard.HRESULT _RegisterThumbButtons()
{
Standard.HRESULT hresult = Standard.HRESULT.S_OK;
if (!this._haveAddedButtons)
{
Standard.THUMBBUTTON[] pButtons = new Standard.THUMBBUTTON[7];
for (int i = 0; i < 7; i++)
{
pButtons[i] = new Standard.THUMBBUTTON {
iId = (uint)i, dwFlags = Standard.THBF.DISABLED | Standard.THBF.HIDDEN | Standard.THBF.NOBACKGROUND, dwMask = Standard.THB.FLAGS | Standard.THB.ICON | Standard.THB.TOOLTIP
};
}
hresult = this._taskbarList.ThumbBarAddButtons(this._hwndSource.Handle, (uint)pButtons.Length, pButtons);
if (hresult == Standard.HRESULT.E_INVALIDARG)
{
hresult = Standard.HRESULT.S_FALSE;
}
this._haveAddedButtons = hresult.Succeeded;
}
return(hresult);
}
private HRESULT _UpdateThumbButtons(bool attached)
{
var nativeButtons = new THUMBBUTTON[c_MaximumThumbButtons];
HRESULT hr = _RegisterThumbButtons();
if (hr.Failed)
{
return hr;
}
ThumbButtonInfoCollection thumbButtons = ThumbButtonInfos;
try
{
uint currentButton = 0;
if (attached && null != thumbButtons)
{
foreach (ThumbButtonInfo wrappedTB in thumbButtons)
{
var nativeTB = new THUMBBUTTON
{
iId = (uint)currentButton,
dwMask = THB.FLAGS | THB.TOOLTIP | THB.ICON,
};
switch (wrappedTB.Visibility)
{
case Visibility.Collapsed:
// HIDDEN removes the button from layout logic.
nativeTB.dwFlags = THBF.HIDDEN;
break;
case Visibility.Hidden:
// To match WPF's notion of hidden, we want this not HIDDEN,
// but disabled, without background, and without icon.
nativeTB.dwFlags = THBF.DISABLED | THBF.NOBACKGROUND;
nativeTB.hIcon = IntPtr.Zero;
break;
default:
case Visibility.Visible:
nativeTB.szTip = wrappedTB.Description ?? "";
nativeTB.hIcon = _GetHICONFromImageSource(wrappedTB.ImageSource, _overlaySize);
if (!wrappedTB.IsBackgroundVisible)
{
nativeTB.dwFlags |= THBF.NOBACKGROUND;
}
if (!wrappedTB.IsEnabled)
{
nativeTB.dwFlags |= THBF.DISABLED;
}
else
{
nativeTB.dwFlags |= THBF.ENABLED;
}
// This is separate from enabled/disabled
if (!wrappedTB.IsInteractive)
{
nativeTB.dwFlags |= THBF.NONINTERACTIVE;
}
if (wrappedTB.DismissWhenClicked)
{
nativeTB.dwFlags |= THBF.DISMISSONCLICK;
}
break;
}
nativeButtons[currentButton] = nativeTB;
++currentButton;
if (currentButton == c_MaximumThumbButtons)
{
break;
}
}
}
// If we're not attached, or the list is less than the maximum number of buttons
// then fill in the rest with collapsed, empty buttons.
for (; currentButton < c_MaximumThumbButtons; ++currentButton)
{
nativeButtons[currentButton] = new THUMBBUTTON
{
iId = (uint)currentButton,
dwFlags = THBF.NOBACKGROUND | THBF.DISABLED | THBF.HIDDEN,
dwMask = THB.FLAGS | THB.ICON | THB.TOOLTIP
};
}
// Finally, apply the update.
return _taskbarList.ThumbBarUpdateButtons(_hwndSource.Handle, (uint)nativeButtons.Length, nativeButtons);
}
finally
{
foreach (var nativeButton in nativeButtons)
{
IntPtr hico = nativeButton.hIcon;
if (IntPtr.Zero != hico)
{
Utility.SafeDestroyIcon(ref hico);
}
}
}
}
private HRESULT _RegisterThumbButtons()
{
HRESULT hr = HRESULT.S_OK;
if (!_haveAddedButtons)
{
// The ITaskbarList3 API requires that the maximum number of buttons to ever be used
// are registered at the beginning. Modifications can be made to this list later.
var nativeButtons = new THUMBBUTTON[c_MaximumThumbButtons];
for (int i = 0; i < c_MaximumThumbButtons; ++i)
{
nativeButtons[i] = new THUMBBUTTON
{
iId = (uint)i,
dwFlags = THBF.NOBACKGROUND | THBF.DISABLED | THBF.HIDDEN,
dwMask = THB.FLAGS | THB.ICON | THB.TOOLTIP
};
}
// If this gets called (successfully) more than once it usually returns E_INVALIDARG. It's not really
// a failure and we potentially want to retry this operation.
hr = _taskbarList.ThumbBarAddButtons(_hwndSource.Handle, (uint)nativeButtons.Length, nativeButtons);
if (hr == HRESULT.E_INVALIDARG)
{
hr = HRESULT.S_FALSE;
}
_haveAddedButtons = hr.Succeeded;
}
return hr;
}
private Standard.HRESULT _UpdateThumbButtons(bool attached)
{
Standard.HRESULT hresult2;
Standard.THUMBBUTTON[] pButtons = new Standard.THUMBBUTTON[7];
Standard.HRESULT hresult = this._RegisterThumbButtons();
if (hresult.Failed)
{
return(hresult);
}
ThumbButtonInfoCollection thumbButtonInfos = this.ThumbButtonInfos;
try
{
uint index = 0;
if (attached && (thumbButtonInfos != null))
{
foreach (ThumbButtonInfo info in thumbButtonInfos)
{
Standard.THUMBBUTTON thumbbutton = new Standard.THUMBBUTTON {
iId = index,
dwMask = Standard.THB.FLAGS | Standard.THB.ICON | Standard.THB.TOOLTIP
};
switch (info.Visibility)
{
case Visibility.Hidden:
thumbbutton.dwFlags = Standard.THBF.DISABLED | Standard.THBF.NOBACKGROUND;
thumbbutton.hIcon = IntPtr.Zero;
break;
case Visibility.Collapsed:
thumbbutton.dwFlags = Standard.THBF.ENABLED | Standard.THBF.HIDDEN;
break;
default:
thumbbutton.szTip = info.Description ?? "";
thumbbutton.hIcon = this._GetHICONFromImageSource(info.ImageSource, this._overlaySize);
if (!info.IsBackgroundVisible)
{
thumbbutton.dwFlags |= Standard.THBF.ENABLED | Standard.THBF.NOBACKGROUND;
}
if (!info.IsEnabled)
{
thumbbutton.dwFlags |= Standard.THBF.DISABLED;
}
else
{
thumbbutton.dwFlags = thumbbutton.dwFlags;
}
if (!info.IsInteractive)
{
thumbbutton.dwFlags |= Standard.THBF.ENABLED | Standard.THBF.NONINTERACTIVE;
}
if (info.DismissWhenClicked)
{
thumbbutton.dwFlags |= Standard.THBF.DISMISSONCLICK;
}
break;
}
pButtons[index] = thumbbutton;
index++;
if (index == 7)
{
break;
}
}
}
while (index < 7)
{
pButtons[index] = new Standard.THUMBBUTTON {
iId = index, dwFlags = Standard.THBF.DISABLED | Standard.THBF.HIDDEN | Standard.THBF.NOBACKGROUND, dwMask = Standard.THB.FLAGS | Standard.THB.ICON | Standard.THB.TOOLTIP
};
index++;
}
hresult2 = this._taskbarList.ThumbBarUpdateButtons(this._hwndSource.Handle, (uint)pButtons.Length, pButtons);
}
finally
{
foreach (Standard.THUMBBUTTON thumbbutton4 in pButtons)
{
IntPtr hIcon = thumbbutton4.hIcon;
if (IntPtr.Zero != hIcon)
{
Standard.Utility.SafeDestroyIcon(ref hIcon);
}
}
}
return(hresult2);
}
