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Creating an image viewer that allows panning, zooming, and displaying WPF overlays requires understanding a variety of techniques and using custom controls. This guide explores the implementation of these features to help create interactive image viewing applications.
To manage pan and zoom behavior, it is recommended to create a custom control that encapsulates the necessary functionality. The ZoomBorder control introduced in this answer serves this purpose.
Image panning is achieved by dragging the mouse. By capturing the mouse position when the left button is pressed, we can calculate the offset and translate the image accordingly.
Image scaling involves adjusting the proportional transformation. Users can use the mouse wheel to zoom in or out. The code calculates the zoom factor relative to the mouse pointer position, ensuring smooth scaling.
Images are displayed using the Image control within ZoomBorder. The ClipToBounds property ensures that the image does not exceed the bounds of the bounds.
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