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package fyne
// Driver defines an abstract concept of a Fyne render driver.
// Any implementation must provide at least these methods.
type Driver interface {
// Create a new UI Window.
CreateWindow(string) Window
// Get a slice containing all app windows.
AllWindows() []Window
// Return the size required to render the given string of specified
// font size and style.
RenderedTextSize(string, int, TextStyle) Size
// Get the canvas that is associated with a given CanvasObject.
CanvasForObject(CanvasObject) Canvas
// Get the position of a given CanvasObject relative to the top/left of a canvas.
AbsolutePositionForObject(CanvasObject) Position
// Start the main event loop of the driver.
// Close the driver and open windows then exit the application.
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