public ControlExample()
{
this.InitializeComponent();
Substitutions = new List <ControlExampleSubstitution>();
ControlPresenter.RegisterPropertyChangedCallback(ContentPresenter.PaddingProperty, ControlPaddingChangedCallback);
}
public async void TakeScreenshotWithDelay()
{
// 3 second countdown
for (int i = 3; i > 0; i--)
{
ScreenshotStatusTextBlock.Text = i.ToString();
await Task.Delay(1000);
}
ScreenshotStatusTextBlock.Text = "Image captured";
// AppRecordingManager is desktop-only, and its use here is quite hacky,
// but it is able to capture popups (though not theme shadows).
bool isAppRecordingPresent = ApiInformation.IsTypePresent("Windows.Media.AppRecording.AppRecordingManager");
if (!isAppRecordingPresent)
{
// Better than doing nothing
TakeScreenshot();
}
else
{
var manager = AppRecordingManager.GetDefault();
if (manager.GetStatus().CanRecord)
{
var result = await manager.SaveScreenshotToFilesAsync(
ApplicationData.Current.LocalFolder,
"appScreenshot",
AppRecordingSaveScreenshotOption.HdrContentVisible,
manager.SupportedScreenshotMediaEncodingSubtypes);
if (result.Succeeded)
{
// Open the screenshot back up
var screenshotFile = await ApplicationData.Current.LocalFolder.GetFileAsync("appScreenshot.png");
using (var stream = await screenshotFile.OpenAsync(FileAccessMode.Read))
{
var decoder = await BitmapDecoder.CreateAsync(stream);
// Find the control in the picture
GeneralTransform t = ControlPresenter.TransformToVisual(Window.Current.Content);
Point pos = t.TransformPoint(new Point(0, 0));
;
if (!CoreApplication.GetCurrentView().TitleBar.ExtendViewIntoTitleBar)
{
// Add the height of the title bar, which I really wish was programmatically available anywhere.
pos.Y += 32.0;
}
// Crop the screenshot to the control area
var transform = new BitmapTransform()
{
Bounds = new BitmapBounds()
{
X = (uint)(Math.Ceiling(pos.X)) + 1, // Avoid the 1px window border
Y = (uint)(Math.Ceiling(pos.Y)) + 1,
Width = (uint)ControlPresenter.ActualWidth - 1, // Rounding issues -- this avoids capturing the control border
Height = (uint)ControlPresenter.ActualHeight - 1
}
};
var softwareBitmap = await decoder.GetSoftwareBitmapAsync(
decoder.BitmapPixelFormat,
BitmapAlphaMode.Ignore,
transform,
ExifOrientationMode.IgnoreExifOrientation,
ColorManagementMode.DoNotColorManage);
// Save the cropped picture
var file = await ApplicationData.Current.LocalFolder.CreateFileAsync(GetBestScreenshotName(), CreationCollisionOption.ReplaceExisting);
using (var outStream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, outStream);
encoder.SetSoftwareBitmap(softwareBitmap);
await encoder.FlushAsync();
}
}
// Delete intermediate file
await screenshotFile.DeleteAsync();
}
}
}
await Task.Delay(1000);
ScreenshotStatusTextBlock.Text = "";
}
