WPF C#实现调整大小的抓地力 [英] WPF C# implementing a resize grip
本文介绍了WPF C#实现调整大小的抓地力的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想对我的工具实施调整大小控制.我知道我可以通过设置ResizeMode="CanResizeWithGrip"
激活夹点,但是我希望夹点位于网格中,该网格仅在悬停时可见.
我用图片制作了一个网格
i want to implement a resize grip to my tool. I know that i can activate a grip by setting ResizeMode="CanResizeWithGrip"
but i want to grip to be in an Grid, which is only visible on Hovering.
I made a Grid with an Image
<Grid x:Name="gridResize" Background="Transparent" >
<Image x:Name="resizeGrip" HorizontalAlignment="Left"
Height="30"
VerticalAlignment="Top"
Width="27"
Source="UserControls/Images/sizegrip.png"/>
</Grid>
我必须在代码中处理以下事件:
And i have to handle these Events in Code:
private void ResizeGrip_MouseDown(object sender, MouseButtonEventArgs e)
{
throw new NotImplementedException();
}
private void GridResize_MouseLeave(object sender, MouseEventArgs e)
{
gridResize.Visibility = Visibility.Hidden;
}
private void GridResize_MouseEnter(object sender, MouseEventArgs e)
{
gridResize.Visibility = Visibility.Visible;
}
有人知道如何实现鼠标按下方法"吗?
Does anyone knows how to implement the Mouse Down Method?
推荐答案
这是一个简单的示例(请注意,我使用边框而不是图像,但是直接更改它)
Here is a simple example (Note I used a Border instead of the image, but changing it is straight forward)
Xaml
<Window x:Class="Test.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Test"
xmlns:scm="clr-namespace:System.ComponentModel;assembly=WindowsBase"
mc:Ignorable="d"
Title="MainWindow"
PreviewMouseMove="window_PreviewMouseMove">
<Grid>
<Grid Background="Red" x:Name="gridResize" Margin="236,235,0,0" >
<Border Focusable="True" Background="Black" BorderBrush="LightGray" BorderThickness="1" Opacity="0.2" x:Name="resizeGrip" HorizontalAlignment="Left" Height="30" VerticalAlignment="Top" Width="27"
PreviewMouseLeftButtonDown="resizeGrip_PreviewMouseLeftButtonDown" PreviewMouseLeftButtonUp="resizeGrip_PreviewMouseLeftButtonUp" >
<Border.Style>
<Style TargetType="Border">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Opacity" Value="1.0"/>
<Setter Property="Cursor" Value="SizeNWSE"/>
</Trigger>
</Style.Triggers>
</Style>
</Border.Style>
</Border>
</Grid>
</Grid>
</Window>
代码
public partial class MainWindow : Window
{
public MainWindow()
{
this.InitializeComponent();
}
Point _startPosition;
bool _isResizing = false;
private void resizeGrip_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (Mouse.Capture(resizeGrip))
{
_isResizing = true;
_startPosition = Mouse.GetPosition(this);
}
}
private void window_PreviewMouseMove(object sender, MouseEventArgs e)
{
if (_isResizing)
{
Point currentPosition = Mouse.GetPosition(this);
double diffX = currentPosition.X - _startPosition.X;
double diffY = currentPosition.Y - _startPosition.Y;
double currentLeft = gridResize.Margin.Left;
double currentTop = gridResize.Margin.Top;
gridResize.Margin = new Thickness(currentLeft + diffX, currentTop + diffY, 0, 0);
_startPosition = currentPosition;
}
}
private void resizeGrip_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (_isResizing == true)
{
_isResizing = false;
Mouse.Capture(null);
}
}
}
这篇关于WPF C#实现调整大小的抓地力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!
查看全文