protected override void OnPointerWheelChanged(PointerWheelEventArgs e)
{
if (double.IsNaN(ShiftX))
{
ShiftX = 0;
}
if (double.IsNaN(ShiftY))
{
ShiftY = 0;
}
var oldx = ShiftX;
var oldy = ShiftY;
double newx = ShiftX, newy = ShiftY;
base.OnPointerWheelChanged(e);
var delta = e.Delta.Y;
Debug.WriteLine("Delta = " + e.Delta);
Debug.WriteLine(e.KeyModifiers);
if (e.KeyModifiers == KeyModifiers.Control)
{
Debug.WriteLine("Raw position: " + e.GetPosition(this));
// get the screen coordinate of the current point.
var p = ScreenPointToDominoCoordinates(e.GetPosition(this));
Debug.WriteLine("Computed position in domino coordinates: " + oldx + ", " + oldy);
var newzoom = Zoom;
if (delta > 0)
{
newzoom *= 1.1;
}
else
{
newzoom *= 1 / 1.1;
}
if (newzoom > FitAllZoomValue / 4 && newzoom < 4)
{
Zoom = newzoom;
}
newx = (p.X - e.GetPosition(this).X / Zoom);
newy = (p.Y - e.GetPosition(this).Y / Zoom);
}
else
{
if (e.KeyModifiers == KeyModifiers.Shift)
{
newx = oldx - 100 * (e.Delta.X + e.Delta.Y);
}
else
{
newx = oldx - 100 * e.Delta.X;
newy = oldy - 100 * delta;
}
}
ShiftX = newx;
ShiftY = newy;
}
/// <summary>
/// Converts <see cref="MouseWheelEventArgs" /> to <see cref="OxyMouseWheelEventArgs" /> for a mouse wheel event.
/// </summary>
/// <param name="e">The <see cref="MouseWheelEventArgs" /> instance containing the event data.</param>
/// <param name="relativeTo">The <see cref="IInputElement" /> that the event is relative to.</param>
/// <returns>A <see cref="OxyMouseWheelEventArgs" /> containing the converted event arguments.</returns>
public static OxyMouseWheelEventArgs ToMouseWheelEventArgs(this PointerWheelEventArgs e, IInputElement relativeTo)
{
return(new OxyMouseWheelEventArgs
{
Position = e.GetPosition(relativeTo).ToScreenPoint(),
ModifierKeys = Keyboard.Instance.GetModifierKeys(),
Delta = (int)(e.Delta.Y + e.Delta.X) * 120
});
}
private void Border_PointerWheelChanged(object sender, PointerWheelEventArgs e)
{
if (_element != null)
{
Point point = e.GetPosition(_element);
point = FixInvalidPointPosition(point);
ZoomDeltaTo(e.Delta.Y, point);
}
}
protected override void OnPointerWheelChanged(PointerWheelEventArgs e)
{
var pointer = e.GetPosition(this);
var controlPressed = e.InputModifiers.HasFlag(InputModifiers.Control);
if (controlPressed)
{
double scale = 0.9 * (e.Delta.Y / 120);
var newFontSize = FontSize;
if (scale < 0)
{
newFontSize *= Math.Abs(scale);
}
else
{
newFontSize /= scale;
}
if (newFontSize < 2)
{
newFontSize = 2;
}
if (newFontSize > 20)
{
newFontSize = 20;
}
if (newFontSize != FontSize)
{
FontSize = newFontSize;
InvalidateVisual();
}
}
else
{
int oldViewTop = ViewTop;
ViewTop -= (int)(e.Delta.Y / 40);
if (ViewTop < 0)
{
ViewTop = 0;
}
else if (ViewTop > Terminal.ViewPort.TopRow)
{
ViewTop = Terminal.ViewPort.TopRow;
}
if (oldViewTop != ViewTop)
{
InvalidateVisual();
}
}
}
private void Wheel(PointerWheelEventArgs e)
{
if (_element == null || _captured)
{
return;
}
var point = e.GetPosition(_element);
ZoomDeltaTo(e.Delta.Y, point.X, point.Y);
}
private void MouseScrollCanvas(object sender, PointerWheelEventArgs args)
{
var pos = args.GetPosition(this);
var matrix = mt.Matrix;
double scale = 1 + args.Delta.Y / 10;
mt.Matrix = ZoomToLocation(matrix, new Point(pos.X - graphCanvas.Bounds.Width / 2, pos.Y - graphCanvas.Bounds.Height / 2), scale);
if (fsmData != null)
{
fsmData.matrix = mt.Matrix;
}
}
private void PanAndZoomBorder_PointerWheelChanged(object sender, PointerWheelEventArgs e)
{
if (_initialize == false && _child != null)
{
var st = GetScaleTransform(_child);
var tt = GetTranslateTransform(_child);
double zoom = e.Delta.Y > 0 ? .2 : -.2;
if (!(e.Delta.Y > 0) && (st.ScaleX < .4 || st.ScaleY < .4))
{
return;
}
Point relative = e.GetPosition(_child);
double abosuluteX = relative.X * st.ScaleX + tt.X;
double abosuluteY = relative.Y * st.ScaleY + tt.Y;
st.ScaleX += zoom;
st.ScaleY += zoom;
tt.X = abosuluteX - relative.X * st.ScaleX;
tt.Y = abosuluteY - relative.Y * st.ScaleY;
}
}