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ExtendedResizeBorder

这是一个让WPF可以在窗口之外区域获得拖动缩放能力的控件。

极其简单的接入

只需要在指定窗口的xaml添加如下的依赖属性即可

并且通过Radius设置border的Thickness

<Window x:Class="WpfApp2.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:extendedResizeBorder="clr-namespace:ExtendedResizeBorder;assembly=ExtendedResizeBorder"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <extendedResizeBorder:ExtendedResizeBorder.ExtendedResizeBorder>
        <extendedResizeBorder:ExtendedResizeBorder Radius="100" />
    </extendedResizeBorder:ExtendedResizeBorder.ExtendedResizeBorder>
    <Grid Background="Transparent" MouseDown="UIElement_OnMouseDown">
        <Grid Margin="100" Background="White" />
        <Button Width="100" Height="100" Command="Undo" />
    </Grid>
</Window>

效果

da25eef0-dc63-40c8-bdb9-220540fb8421

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Enable WPF window has an outside resizable border

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