Open a window and call view-fn to draw.

view-fn should be a 0 argument function that returns a view. view-fn will be called for every repaint.

options is a map that can contain the following keys Optional parameters

window-title: The string that appears in the title bar of the window.

window-start-width: the starting width of the window window-start-height: the starting height of the window note: The window may be resized.

window-start-x: the starting x coordinate of the top left corner of the window window-start-y: the starting y coordinate of the top left corner of the window note: The window may be moved.

Open a window and call view-fn to draw. Returns when the window is closed.

view-fn should be a 0 argument function that returns a view. view-fn will be called for every repaint.

options is a map that can contain the following keys Optional parameters

window-title: The string that appears in the title bar of the window.

window-start-width: the starting width of the window window-start-height: the starting height of the window note: The window may be resized.

window-start-x: the starting x coordinate of the top left corner of the window window-start-y: the starting y coordinate of the top left corner of the window note: The window may be moved.