Get floating point values which represent the viewable portion of the
text. Each element is a real fraction between 0 and 1; together they
describe the vertical span that is visible in the window. For example,
if the first element is .2 and the second element is .6, 20% of the
entry's text is off-screen to the bottom, the middle 40% is visible in the
window, and 40% of the text is off-screen to the bottom.
Get floating point values which represent the viewable portion of the text. Each element is a real fraction between 0 and 1; together they describe the vertical span that is visible in the window. For example, if the first element is .2 and the second element is .6, 20% of the entry's text is off-screen to the bottom, the middle 40% is visible in the window, and 40% of the text is off-screen to the bottom.