How WPF obtains relative positions, coordinates

Source: WPF methods for acquiring relative positions and coordinates

1. Get the coordinates of the mouse in the control:

1 Private voidItem_mousedown (Objectsender, MouseButtonEventArgs e)2 {3Point point =e.getposition (LBL); 4 5  }6 7 //or directly using the static method of the mouse Class GetPosition (),8 //It is important to note that the parameter is of type IInputElement, that is, if the control can be entered9Point Point2 =mouse.getposition (LBL2);TenLbl2. Content ="("+ Point2. X +", "+ Point2. Y +")";

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Complete example code:

XAML Code

1 <Windowx:class= "Wpfgetpointdemo.mainwindow"2 xmlns= "Http://schemas.microsoft.com/winfx/2006/xaml/presentation"3 xmlns:x= "Http://schemas.microsoft.com/winfx/2006/xaml"4 Title= "MainWindow"Height= " the"Width= "525">5     <Gridx:name= "Grid"MouseDown= "Item_mousedown">6         <LabelBackground= "Red"x:name= "LBL"Margin= "293.855,59.398,66.145,77.319"/>7         <LabelBackground= "Greenyellow"x:name= "Lbl2"Margin= "29.488,59.398,327.512,69.969"/>8         <LabelBackground= "Blue"x:name= "Lbl3"HorizontalAlignment= "Left"Margin= "133.048,268.187,0,0"VerticalAlignment= "Top"Width= "250.952"Height= "51.813"/>9         <Buttonx:name= "BTN"HorizontalAlignment= "Left"Margin= "177.325,10,0,0"VerticalAlignment= "Top"Width= "135.09"Rendertransformorigin= "0.012,0.547"Height= "43.252"/>Ten     </Grid> One </Window>

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Background C # code

1 using System;2 using System.Collections.Generic;3 using System.Linq;4 using System.Text;5 using System.Windows;6 using System.Windows.Controls;7 using System.Windows.Data;8 using System.Windows.Documents;9 using System.Windows.Input;Ten using System.Windows.Media; One using System.Windows.Media.Imaging; A using System.Windows.Navigation; - using System.Windows.Shapes; -  the namespace Wpfgetpointdemo - { -///<Summary> - // Interaction logic for MainWindow.xaml +///</Summary> - Public partial class Mainwindow:window +     { A Public MainWindow () at         { - InitializeComponent (); -         } -  - private void Item_mousedown (object sender, MouseButtonEventArgs e) -         { in Point point = E.getposition (LBL);  - LBL. Content = "(" +point. X+ "," +point. Y+ ")"; to  + Point Point2 = Mouse.getposition (LBL2); - lbl2. Content = "(" + Point2. X + "," + Point2. Y + ")"; the  * Point Point3 = mouse.getposition (grid); $ Lbl3. Content = "(" + point3. X + "," + Point3. Y + ")";Panax Notoginseng  - Point point4 = Mouse.getposition (BTN); the btn. Content = "(" + point4. X + "," + point4. Y + ")"; +         } A     } the}

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Operation Result:

2. Gets the coordinates of a control relative to 21 controls:

2.1. Use Control1 directly. Translatepoint (new Point (), control2)

1 Point point = Rectangle. Translatepoint (new point (), canvas);    2  

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2.2. Get the coordinates of the control in window

1 Window window =  window.getwindow (canvas);   2 Point  point  =  Canvas. Transformtoancestor (window). Transform (new Point (00));  

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Reference: http://www.fengfly.com/plus/view-210427-1.html

How WPF obtains relative positions, coordinates