如何让事件处理的图像点击鼠标的坐标? [英] How to get the coordinates of an image mouse click in the event handler?

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问题描述

在下面的 WPF 应用,我有一个 ContentControl中图片即可。当图片用户点击,我怎么能得到的的其中鼠标单击图像的 x / y坐标?



XAML:



 <窗口x:类=TestClick828374.Window1
的xmlns =http://schemas.microsoft.com/winfx/2006/xaml/presentation
的xmlns:X =HTTP://模式。 microsoft.com/winfx/2006/xaml
标题=窗口1HEIGHT =300WIDTH =300>
< StackPanel的保证金=10>
< ContentControl中CONTENT ={结合TheImage}的MouseDown =ContentControl_MouseDown/>
< / StackPanel的>
< /窗GT;



代码隐藏:



 使用系统;使用System.Windows 
;使用System.Windows.Controls的
;使用System.Windows.Media
;
使用System.Windows.Media.Imaging;
使用System.ComponentModel;

命名空间TestClick828374
{
公共部分类窗口1:窗口,INotifyPropertyChanged的
{
#地区ViewModelProperty:TheImage
私人图片_theImage;
公众形象TheImage
{
得到
{
返回_theImage;
}


{
_theImage =价值;
OnPropertyChanged(TheImage);
}
}
#endregion

公共窗口1()
{
的InitializeComponent();
的DataContext =这一点;

TheImage =新的图像();
TheImage.Source =新的BitmapImage(新的URI(@C:\test\rectangle.png));
TheImage.Stretch = Stretch.None;
TheImage.Horizo​​ntalAlignment = Horizo​​ntalAlignment.Left;

}

#地区INotifiedProperty座
公共事件PropertyChangedEventHandler的PropertyChanged;

保护无效OnPropertyChanged(字符串propertyName的)
{
PropertyChangedEventHandler处理器=的PropertyChanged;

如果(处理!= NULL)
{
处理器(这一点,新PropertyChangedEventArgs(propertyName的));
}
}
#endregion

私人无效ContentControl_MouseDown(对象发件人,System.Windows.Input.MouseButtonEventArgs E)
{
/ /如何获得鼠标的坐标请点击图片?
}

}
}


解决方案

发现:

 点clickPoint = e.GetPosition(TheImage); 

下面的显示解决方案我完整的代码示例:



http://www.tanguay.info/web/index.php?pg = codeExamples和ID = 364


In the following WPF app, I have an Image in a ContentControl. When the user clicks on the image, how can I get the x/y coordinates of where the mouse clicked on the image?

XAML:

<Window x:Class="TestClick828374.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300">
    <StackPanel Margin="10">
        <ContentControl Content="{Binding TheImage}" MouseDown="ContentControl_MouseDown"/>
    </StackPanel>
</Window>

Code-Behind:

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.ComponentModel;

namespace TestClick828374
{
    public partial class Window1 : Window, INotifyPropertyChanged
    {
        #region ViewModelProperty: TheImage
        private Image _theImage;
        public Image TheImage
        {
            get
            {
                return _theImage;
            }

            set
            {
                _theImage = value;
                OnPropertyChanged("TheImage");
            }
        }
        #endregion

        public Window1()
        {
            InitializeComponent();
            DataContext = this;

            TheImage = new Image();
            TheImage.Source = new BitmapImage(new Uri(@"c:\test\rectangle.png"));
            TheImage.Stretch = Stretch.None;
            TheImage.HorizontalAlignment = HorizontalAlignment.Left;

        }

        #region INotifiedProperty Block
        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged(string propertyName)
        {
            PropertyChangedEventHandler handler = PropertyChanged;

            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(propertyName));
            }
        }
        #endregion

        private void ContentControl_MouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            //how to get the coordinates of the mouse click here on the image?
        }

    }
}

解决方案

Found it:

Point clickPoint = e.GetPosition(TheImage);

Here's my full code example showing the solution:

http://www.tanguay.info/web/index.php?pg=codeExamples&id=364

这篇关于如何让事件处理的图像点击鼠标的坐标?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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