README.md

UI-Cropping-Image

A simply UI cropping image library for WPF that use adroner layer. Some screenshots:

Interface of sample app

Cropping result image

Cropping result image info

Main Workflow:

1. Load image
2. Select cropping area
3. Crop and save image

Main features:

• Can draw/redraw cropping rectangle
• Can move cropping rectangle
• Can resize cropping rectangle
• Shadow area outside of cropping rectangle
• Show current size of cropping rectangle

Basic Setup

XAML:

<Grid x:Name="RootGrid" MouseLeftButtonDown="RootGrid_OnMouseLeftButtonDown">
    <Canvas x:Name="CanvasPanel"
                Grid.Column="1">
        <Border Height="{Binding ElementName=CanvasPanel, Path=ActualHeight}" Width="{Binding ElementName=CanvasPanel, Path=ActualWidth}" Background="LightBlue">
            <Image x:Name = "SourceImage"
                       Stretch="Fill"/>
        </Border>
    </Canvas>
</Grid>

Code Behind:

    public CroppingAdorner CroppingAdorner;

    private void RootGrid_OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        CroppingAdorner.CaptureMouse();
        CroppingAdorner.MouseLeftButtonDownEventHandler(sender, e);
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(CanvasPanel);
        CroppingAdorner = new CroppingAdorner(CanvasPanel);
        adornerLayer.Add(CroppingAdorner);
    }