protected override void OnApplyTemplate()
{
base.OnApplyTemplate();
_canvas = GetTemplateChild <Canvas>(CanvasName);
_image = GetTemplateChild <Image>(ImageName);
// Add manipulation event handlers
_canvas.ManipulationMode =
ManipulationModes.Scale | ManipulationModes.ScaleInertia |
ManipulationModes.TranslateX | ManipulationModes.TranslateY | ManipulationModes.TranslateInertia;
_canvas.ManipulationStarting += OnManipulationStarting;
_canvas.ManipulationStarted += OnManipulationStarted;
_canvas.ManipulationDelta += OnManipulationDelta;
_canvas.ManipulationCompleted += OnManipulationCompleted;
_canvas.ManipulationInertiaStarting += OnManipulationInertiaStarting;
// CAUTION: this needs to not happen in design mode, as it causes a problem there
// Window.Current.CoreWindow.PointerWheelChanged += OnPointerWheelChanged;
FrameworkElementExtensions.SetCursor(this, new CoreCursor(CoreCursorType.Arrow, 0));
_canvas.PointerMoved += OnPointerMoved;
_cropLeft = _cropRight = _cropTop = _cropBottom = 50;
// Set image to a zero size until it's properly loaded
// This handily avoids some crashes, and some visual issues
SetWidthHeight(_image, 0, 0);
_isTemplateApplied = true;
Setup();
}
private Point SetCursorForPosition(Point position)
{
DragMode dragMode = CalculateDragMode(position);
CoreCursorType cursorType;
if (dragMode == DragMode.Full)
{
cursorType = CoreCursorType.Hand;
}
else if (dragMode == DragMode.TopLeft || dragMode == DragMode.BottomRight)
{
cursorType = CoreCursorType.SizeNorthwestSoutheast;
}
else if (dragMode == DragMode.TopRight || dragMode == DragMode.BottomLeft)
{
cursorType = CoreCursorType.SizeNortheastSouthwest;
}
else if (dragMode == DragMode.Top || dragMode == DragMode.Bottom)
{
cursorType = CoreCursorType.SizeNorthSouth;
}
else if (dragMode == DragMode.Left || dragMode == DragMode.Right)
{
cursorType = CoreCursorType.SizeWestEast;
}
else
{
cursorType = CoreCursorType.Arrow;
}
FrameworkElementExtensions.SetCursor(this, new CoreCursor(cursorType, (uint)cursorType));
return(position);
}
private void DetermineResizeCursor()
{
var effectiveResizeDirection =
this.DetermineEffectiveResizeDirection();
if (effectiveResizeDirection == GridResizeDirection.Columns)
{
FrameworkElementExtensions.SetCursor(this, new CoreCursor(CoreCursorType.SizeWestEast, 1));
}
else
{
FrameworkElementExtensions.SetCursor(this, new CoreCursor(CoreCursorType.SizeNorthSouth, 1));
}
}