Automatic StatusInteractivePopUpWindow positioning.

[tal]

StatusInteractivePopUpWindow is very useful. I find myself using it a lot to show a quick input centered within the current glyph editor. (These are little interfaces like the built in "jump to glyph.") Positioning these requires a bit of code that I've been copy/pasting from script to script. I've repeated it enough that I'm wondering if it should be part of mojo. Here's the code:

from mojo.UI import CurrentGlyphWindow, StatusInteractivePopUpWindow

def getGlyphEditorRectAndScreen(editorWindow):
    screen = editorWindow.w.getNSWindow().screen()
    nsWindow = editorWindow.w.getNSWindow()
    scrollView = editorWindow.getGlyphView().enclosingScrollView()
    rectInWindowCoords = scrollView.convertRect_toView_(scrollView.frame(), None)
    rectInScreenCoords = nsWindow.convertRectToScreen_(rectInWindowCoords)
    (screenX, screenY), (screenWidth, screenHeight) = screen.frame()
    (x, y), (w, h) = rectInScreenCoords
    y = -(y + h)
    return (x, y, w, h), screen

class MyThing(object):

    def __init__(blah):
        # ...
        width = 370
        height = 505
        editorWindow = CurrentGlyphWindow()
        (editorX, editorY, editorW, editorH), screen = getGlyphEditorRectAndScreen(editorWindow)
        x = editorX + ((editorW - width) / 2)
        y = editorY + ((editorH - height) / 2)
        self.w = StatusInteractivePopUpWindow((x, y, width, height), screen=screen)
        # ...

Here's what I'm thinking could be added to mojo:

from mojo.UI import CurrentGlyphWindow, StatusInteractivePopUpWindow

class MyThing(object):
    self.w = StatusInteractivePopUpWindow((w, h), centerInView=CurrentGlyphWindow().getGlyphView())

The centerInView arg would take a NSView object. It would check to see if the view is enclosed in a scroll view and, if so, use the scroll view as the view to center within.

I'd be happy to contribute code to do this if you like the idea.