private async void Current_SizeChanged(object sender, Windows.UI.Core.WindowSizeChangedEventArgs e)
{
var height = ApplicationView.GetForCurrentView().VisibleBounds.Height;
var width = ApplicationView.GetForCurrentView().VisibleBounds.Width;
if (UWPPlatformTool.IsMobile)
{
border.Width = this.Width = width;
border.Height = this.Height = height;
}
else
{
border.Width = width;
border.Height = height;
this.Height = height * 0.8;
this.Width = this.Height * 1.6;
}
SetCanvas();
MyCanvas.Invalidate();
await Task.Delay(10);
SetCanvas();
MyCanvas.Invalidate();
}
private void SetCanvas()
{
var w = MainWorkSapce.ActualWidth - 40; //
var h = MainWorkSapce.ActualHeight - 40; //
if (w <= 0 || h <= 0)
{
return;
}
if (_size_mode == 0) //1:1
{
var l = w > h ? h : w;
MyCanvas.Width = MyCanvas.Height = l;
}
else if (_size_mode == 1) //4:3
{
if (w <= h)
{
MyCanvas.Width = w;
MyCanvas.Height = MyCanvas.Width * 3 / 4;
}
else
{
if (w / h <= (double)4 / 3)
{
MyCanvas.Width = w;
MyCanvas.Height = MyCanvas.Width * 3 / 4;
}
else
{
MyCanvas.Height = h;
MyCanvas.Width = MyCanvas.Height * 4 / 3;
}
}
}
else //3:4
{
if (h <= w)
{
MyCanvas.Height = h;
MyCanvas.Width = MyCanvas.Height * 3 / 4;
}
else
{
if (h / w <= (double)4 / 3)
{
MyCanvas.Height = h;
MyCanvas.Width = MyCanvas.Height * 3 / 4;
}
else
{
MyCanvas.Width = w;
MyCanvas.Height = MyCanvas.Width * 4 / 3;
}
}
}
MyCanvas.Invalidate();
}
private void UpdateEffect()
{
// Update Video Effect's values
if (PageViewModel.SelectedEffect == null)
{
return;
}
MyCanvas.Invalidate();
}
private void Filters_ItemClick(object sender, ItemClickEventArgs e)
{
foreach (var item in Filters.Items)
{
(((item as GridViewItem).Content as StackPanel).Children[1] as Border).Background = new SolidColorBrush(Colors.Pink);
((((item as GridViewItem).Content as StackPanel).Children[1] as Border).Child as TextBlock).Foreground = new SolidColorBrush(Colors.Black);
}
((e.ClickedItem as StackPanel).Children[1] as Border).Background = new SolidColorBrush(Colors.Pink);
(((e.ClickedItem as StackPanel).Children[1] as Border).Child as TextBlock).Foreground = new SolidColorBrush(Colors.DeepPink);
_filter_index = int.Parse((e.ClickedItem as StackPanel).Tag.ToString());
MyCanvas.Invalidate();
}
public async void Show(StorageFile image)
{
try
{
Show();
WaitLoading.IsActive = true;
CanvasDevice cd = CanvasDevice.GetSharedDevice();
var stream = await image.OpenAsync(FileAccessMode.Read);
_image = await CanvasBitmap.LoadAsync(cd, stream);
WaitLoading.IsActive = false;
MyCanvas.Invalidate();
}
catch
{
}
}
private async Task LoadVirtualBitmap()
{
try
{
ShowBusyIndicator("loading image...");
if (virtualBitmap != null)
{
virtualBitmap.Dispose();
virtualBitmap = null;
}
if (!string.IsNullOrEmpty(imageFilePath))
{
var storageFile = await StorageFile.GetFileFromPathAsync(imageFilePath);
using (var stream = await storageFile.OpenReadAsync())
{
virtualBitmap = await CanvasVirtualBitmap.LoadAsync(MyCanvas.Device, stream);
}
}
// This can happen if the page is unloaded while this method is running
if (MyCanvas == null || virtualBitmap == null)
{
return;
}
MyCanvas.Width = virtualBitmap.Size.Width;
MyCanvas.Height = virtualBitmap.Size.Height;
MyCanvas.Invalidate();
}
catch (Exception ex)
{
await new MessageDialog($"Something went wrong loading the image: {ex}", "Exception").ShowAsync();
}
finally
{
HideBusyIndicator();
}
}
private void Slider_ValueChanged(object sender, RangeBaseValueChangedEventArgs e)
{
MyCanvas.Invalidate();
}
