protected virtual async Task <bool> CreateImages(IntPtr handle)
{
Logger.Write(this, LogLevel.Debug, "Creating taskbar button image list.");
var source = HwndSource.FromHwnd(handle);
var width = WindowsImageList.GetSystemMetrics(
WindowsImageList.SystemMetric.SM_CXSMICON
);
var height = WindowsImageList.GetSystemMetrics(
WindowsImageList.SystemMetric.SM_CYSMICON
);
Logger.Write(this, LogLevel.Debug, "Taskbar buttom image dimentions: {0}x{1}", width, height);
var imageList = WindowsImageList.ImageList_Create(
width,
height,
WindowsImageList.ILC_COLOR32,
4,
0
);
if (IntPtr.Zero.Equals(imageList))
{
Logger.Write(this, LogLevel.Warn, "Failed to create button image list.");
this.Windows[handle] |= TaskbarButtonsWindowFlags.Error;
return(false);
}
else
{
this.ImageLists[handle] = imageList;
}
for (var a = 0; a < 4; a++)
{
using (var bitmap = this.GetImage(a, width, height))
{
if (!this.AddImage(handle, imageList, bitmap, width, height))
{
return(false);
}
}
}
var result = default(WindowsTaskbarList.HResult);
await this.Invoke(
source.Dispatcher,
() => result = WindowsTaskbarList.Instance.ThumbBarSetImageList(handle, imageList)
).ConfigureAwait(false);
if (result != WindowsTaskbarList.HResult.Ok)
{
Logger.Write(this, LogLevel.Warn, "Failed to create button image list: {0}", Enum.GetName(typeof(WindowsTaskbarList.HResult), result));
this.Windows[handle] |= TaskbarButtonsWindowFlags.Error;
return(false);
}
else
{
Logger.Write(this, LogLevel.Debug, "Taskbar button image list created.");
this.Windows[handle] |= TaskbarButtonsWindowFlags.ImagesCreated;
return(true);
}
}
protected virtual bool DestroyImages(IntPtr handle)
{
var imageList = default(IntPtr);
if (!this.ImageLists.TryGetValue(handle, out imageList))
{
//There was no image list to destroy.
return(true);
}
var result = WindowsImageList.ImageList_Destroy(imageList);
if (!result)
{
Logger.Write(this, LogLevel.Warn, "Failed to destroy image list: {0}", Enum.GetName(typeof(WindowsTaskbarList.HResult), result));
this.Windows[handle] |= TaskbarButtonsWindowFlags.Error;
return(false);
}
else
{
Logger.Write(this, LogLevel.Debug, "Taskbar button image list destroyed.");
this.Windows[handle] &= ~TaskbarButtonsWindowFlags.ImagesCreated;
return(true);
}
}
protected virtual bool AddImage(IntPtr handle, IntPtr imageList, Bitmap bitmap, int width, int height)
{
var bitmapBits = default(IntPtr);
var bitmapInfo = new WindowsImageList.BITMAPINFO()
{
biSize = 40,
biBitCount = 32,
biPlanes = 1,
biWidth = width,
biHeight = height
};
var bitmapSection = WindowsImageList.CreateDIBSection(
IntPtr.Zero,
bitmapInfo,
0,
out bitmapBits,
IntPtr.Zero,
0
);
if (IntPtr.Zero.Equals(bitmapSection))
{
Logger.Write(this, LogLevel.Warn, "Failed to create DIB.");
this.Windows[handle] |= TaskbarButtonsWindowFlags.Error;
return(false);
}
var bitmapData = bitmap.LockBits(
new Rectangle(
0,
0,
bitmap.Width,
bitmap.Height
),
ImageLockMode.ReadOnly,
PixelFormat.Format32bppArgb
);
{
var result = WindowsImageList.RtlMoveMemory(
bitmapBits,
bitmapData.Scan0,
bitmap.Height * bitmapData.Stride
);
if (!result)
{
Logger.Write(this, LogLevel.Warn, "Call to RtlMoveMemory reports failure.");
this.Windows[handle] |= TaskbarButtonsWindowFlags.Error;
return(false);
}
}
bitmap.UnlockBits(bitmapData);
{
var result = WindowsImageList.ImageList_Add(
imageList,
bitmapSection,
IntPtr.Zero
);
if (result < 0)
{
Logger.Write(this, LogLevel.Warn, "Failed to add image to ImageList.");
this.Windows[handle] |= TaskbarButtonsWindowFlags.Error;
return(false);
}
}
return(true);
}