85 lines
2.9 KiB
C#
85 lines
2.9 KiB
C#
// hardcodet.net NotifyIcon for WPF
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// Copyright (c) 2009 - 2020 Philipp Sumi
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// Contact and Information: http://www.hardcodet.net
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the Code Project Open License (CPOL);
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// either version 1.0 of the License, or (at your option) any later
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// version.
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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//
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// THIS COPYRIGHT NOTICE MAY NOT BE REMOVED FROM THIS FILE
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using System.Diagnostics.Contracts;
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using System.Windows.Interop;
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namespace Hardcodet.Wpf.TaskbarNotification.Interop
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{
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/// <summary>
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/// This class is a helper for system information, currently to get the DPI factors
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/// </summary>
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public static class SystemInfo
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{
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/// <summary>
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/// Make sure the initial value is calculated at the first access
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/// </summary>
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static SystemInfo()
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{
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UpdateDpiFactors();
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}
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/// <summary>
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/// This calculates the current DPI values and sets this into the DpiFactorX/DpiFactorY values
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/// </summary>
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internal static void UpdateDpiFactors()
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{
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using (var source = new HwndSource(new HwndSourceParameters()))
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{
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if (source.CompositionTarget?.TransformToDevice != null)
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{
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DpiFactorX = source.CompositionTarget.TransformToDevice.M11;
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DpiFactorY = source.CompositionTarget.TransformToDevice.M22;
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return;
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}
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}
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DpiFactorX = DpiFactorY = 1;
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}
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/// <summary>
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/// Returns the DPI X Factor
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/// </summary>
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public static double DpiFactorX { get; private set; } = 1;
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/// <summary>
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/// Returns the DPI Y Factor
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/// </summary>
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public static double DpiFactorY { get; private set; } = 1;
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/// <summary>
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/// Scale the supplied point to the current DPI settings
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/// </summary>
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/// <param name="point"></param>
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/// <returns>Point</returns>
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[Pure]
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public static Point ScaleWithDpi(this Point point)
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{
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return new Point
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{
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X = (int)(point.X / DpiFactorX),
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Y = (int)(point.Y / DpiFactorY)
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};
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}
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}
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} |