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// Util.cs
//
// Author:
// Eric Maupin <ermau@xamarin.com>
//
// Copyright (c) 2012 Xamarin, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System.Windows;
using System.Windows.Media;
using System;
using Xwt.Backends;
namespace Xwt.WPFBackend
{
public static class Util
{
public static Size GetPixelRatios (this Visual self)
{
var source = PresentationSource.FromVisual (self);
if (source == null)
return new Size (1, 1);
Matrix m = source.CompositionTarget.TransformToDevice;
return new Size (m.M11, m.M22);
}
public static double GetScaleFactor (this Visual self)
{
PresentationSource source = PresentationSource.FromVisual (self);
if (source == null)
return 1;
Matrix m = source.CompositionTarget.TransformToDevice;
return m.M11;
}
public static System.Windows.Point PointToScreenDpiAware(this Visual visual, System.Windows.Point point)
{
point = visual.PointToScreen(point);
PresentationSource source = PresentationSource.FromVisual(visual);
double scaleFactorX = source.CompositionTarget.TransformToDevice.M11;
double scaleFactorY = source.CompositionTarget.TransformToDevice.M22;
return new System.Windows.Point(point.X / scaleFactorX, point.Y / scaleFactorY);
}
public static HorizontalAlignment ToWpfHorizontalAlignment(Alignment alignment)
{
switch (alignment) {
case Alignment.Start:
return HorizontalAlignment.Left;
case Alignment.Center:
return HorizontalAlignment.Center;
case Alignment.End:
return HorizontalAlignment.Right;
}
throw new InvalidOperationException("Invalid alignment value: " + alignment);
}
public static System.Windows.Window GetParentWindow (this FrameworkElement element)
{
FrameworkElement current = element;
while (current != null) {
if (current is System.Windows.Window)
return (System.Windows.Window)current;
current = VisualTreeHelper.GetParent (current) as FrameworkElement;
}
return null;
}
}
class XwtWin32Window : System.Windows.Forms.IWin32Window
{
public XwtWin32Window (IWindowFrameBackend window)
{
this.window = window;
}
public IntPtr Handle {
get { return window.NativeHandle; }
}
readonly IWindowFrameBackend window;
}
}
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