mirror of https://github.com/dahall/Vanara.git
68 lines
2.7 KiB
C#
68 lines
2.7 KiB
C#
using System;
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using System.Drawing;
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using System.Windows.Forms;
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using Vanara.PInvoke;
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using static Vanara.PInvoke.User32;
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namespace Vanara.Extensions
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{
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/// <summary>Extension methods for windows to process points in the coordinate space.</summary>
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public static partial class MapPointExtension
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{
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/// <summary>
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/// The MapPoint method converts (maps) a point from a coordinate space relative to one window to a coordinate space relative to
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/// another window.
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/// </summary>
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/// <param name="ctrl">The control.</param>
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/// <param name="pt">The pt.</param>
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/// <param name="newWin">The new win.</param>
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/// <returns></returns>
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public static POINT MapPoint(this IWin32Window ctrl, POINT pt, IWin32Window newWin = null)
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{
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MapWindowPoints(GetHandle(ctrl), GetHandle(newWin), ref pt, 1);
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return pt;
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}
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/// <summary>
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/// The MapPoint method converts (maps) a set of points from a coordinate space relative to one window to a coordinate space
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/// relative to another window.
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/// </summary>
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/// <param name="ctrl">The control.</param>
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/// <param name="points">The points.</param>
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/// <param name="newWin">The new win.</param>
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/// <exception cref="System.ArgumentNullException">points</exception>
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public static void MapPoints(this IWin32Window ctrl, POINT[] points, IWin32Window newWin = null)
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{
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if (points == null) throw new ArgumentNullException(nameof(points));
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MapWindowPoints(GetHandle(ctrl), GetHandle(newWin), points, points.Length);
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/*POINT[] pts = new POINT[points.Length];
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points.CopyTo(pts, 0);
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for (int i = 0; i < pts.Length; i++)
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MapWindowPoints(GetHandleRef(ctrl), GetHandleRef(newWin), ref pts[i], 1);
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return pts;*/
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}
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/// <summary>The MapPoint method converts (maps) a point from a coordinate space relative to one window to the desktop.</summary>
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/// <param name="ctrl">The control.</param>
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/// <param name="pt">The pt.</param>
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/// <returns></returns>
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public static POINT MapPointToClient(this IWin32Window ctrl, POINT pt) => MapPoint(null, pt, ctrl);
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/// <summary>
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/// The MapPoint method converts (maps) a rectangle from a coordinate space relative to one window to a coordinate space relative to
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/// another window.
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/// </summary>
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/// <param name="ctrl">The control.</param>
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/// <param name="rectangle">The rectangle.</param>
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/// <param name="newWin">The new win.</param>
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/// <returns></returns>
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public static Rectangle MapRectangle(this IWin32Window ctrl, Rectangle rectangle, IWin32Window newWin = null)
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{
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RECT ir = rectangle;
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MapWindowPoints(GetHandle(ctrl), GetHandle(newWin), ref ir, 2);
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return ir;
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}
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private static HWND GetHandle(IWin32Window ctrl) => new HWND(ctrl?.Handle ?? IntPtr.Zero);
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}
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} |