def download_file(url, dest=None, chunk_size=1024, replace="ask",
                  label="Downloading {dest_basename} ({size:.2f}MB)",
                  expected_extension=None):
    """Download a file from a given URL and display progress.

    :param dest: If the destination exists and is a directory, the filename
        will be guessed from the Content-Disposition header. If the destination
        is an existing file, the user will either be prompted to overwrite, or
        the file will be replaced (depending on the value of **replace**). If
        the destination does not exist, it will be used as the filename.
    :param int chunk_size: bytes read in at a time.
    :param replace: If `False`, an existing destination file will not be
        overwritten.
    :param label: a string which is formatted and displayed as the progress bar
        label. Variables provided include *dest_basename*, *dest*, and *size*.
    :param expected_extension: if set, the filename will be sanitized to ensure
        it has the given extension. The extension should not start with a dot
        (`.`).
    """
    dest = Path(dest or url.split("/")[-1])
    response = get(url, stream=True)
    if (dest.exists()
            and dest.is_dir()
            and "Content-Disposition" in response.headers):
        content_disposition = rfc6266.parse_requests_response(response)
        if expected_extension is not None:
            filename = content_disposition.filename_sanitized(
                expected_extension)
        filename = secure_filename(filename)
        dest = dest / filename
    if dest.exists() and not dest.is_dir():
        if (replace is False
                or replace == "ask"
                and not click.confirm("Replace {}?".format(dest))):
            return str(dest)
    size = int(response.headers.get("content-length", 0))
    label = label.format(dest=dest, dest_basename=dest.name,
                         size=size/1024.0/1024)
    with click.open_file(str(dest), "wb") as f:
        content_iter = response.iter_content(chunk_size=chunk_size)
        with click.progressbar(content_iter, length=size/1024,
                               label=label) as bar:
            for chunk in bar:
                if chunk:
                    f.write(chunk)
                    f.flush()
    return str(dest)
def draw_input_prefs(inputs, layout):
        import sys

        # General settings
        row = layout.row()
        col = row.column()

        sub = col.column()
        sub.label(text="Presets:")
        subrow = sub.row(align=True)

        subrow.menu("USERPREF_MT_interaction_presets", text=bpy.types.USERPREF_MT_interaction_presets.bl_label)
        subrow.operator("wm.interaction_preset_add", text="", icon='ZOOMIN')
        subrow.operator("wm.interaction_preset_add", text="", icon='ZOOMOUT').remove_active = True
        sub.separator()

        sub.label(text="Mouse:")
        sub1 = sub.column()
        sub1.active = (inputs.select_mouse == 'RIGHT')
        sub1.prop(inputs, "use_mouse_emulate_3_button")
        sub.prop(inputs, "use_mouse_continuous")
        sub.prop(inputs, "drag_threshold")
        sub.prop(inputs, "tweak_threshold")

        sub.label(text="Select With:")
        sub.row().prop(inputs, "select_mouse", expand=True)

        sub = col.column()
        sub.label(text="Double Click:")
        sub.prop(inputs, "mouse_double_click_time", text="Speed")

        sub.separator()

        sub.prop(inputs, "use_emulate_numpad")

        sub.separator()

        sub.label(text="Orbit Style:")
        sub.row().prop(inputs, "view_rotate_method", expand=True)

        sub.separator()

        sub.label(text="Zoom Style:")
        sub.row().prop(inputs, "view_zoom_method", text="")
        if inputs.view_zoom_method in {'DOLLY', 'CONTINUE'}:
            sub.row().prop(inputs, "view_zoom_axis", expand=True)
            sub.prop(inputs, "invert_mouse_zoom", text="Invert Mouse Zoom Direction")

        #sub.prop(inputs, "use_mouse_mmb_paste")

        #col.separator()

        sub = col.column()
        sub.prop(inputs, "invert_zoom_wheel", text="Invert Wheel Zoom Direction")
        #sub.prop(view, "wheel_scroll_lines", text="Scroll Lines")

        if sys.platform == "darwin":
            sub = col.column()
            sub.prop(inputs, "use_trackpad_natural", text="Natural Trackpad Direction")

        col.separator()
        sub = col.column()
        sub.label(text="View Navigation:")
        sub.row().prop(inputs, "navigation_mode", expand=True)
        if inputs.navigation_mode == 'WALK':
            walk = inputs.walk_navigation

            sub.prop(walk, "use_mouse_reverse")
            sub.prop(walk, "mouse_speed")
            sub.prop(walk, "teleport_time")

            sub = col.column(align=True)
            sub.prop(walk, "walk_speed")
            sub.prop(walk, "walk_speed_factor")

            sub.separator()
            sub.prop(walk, "use_gravity")
            sub = col.column(align=True)
            sub.active = walk.use_gravity
            sub.prop(walk, "view_height")
            sub.prop(walk, "jump_height")

        if inputs.use_ndof:
            col.separator()
            col.label(text="NDOF Device:")
            sub = col.column(align=True)
            sub.prop(inputs, "ndof_sensitivity", text="NDOF Sensitivity")
            sub.prop(inputs, "ndof_orbit_sensitivity", text="NDOF Orbit Sensitivity")
            sub.prop(inputs, "ndof_deadzone", text="NDOF Deadzone")
            sub = col.column(align=True)
            sub.row().prop(inputs, "ndof_view_navigate_method", expand=True)
            sub.row().prop(inputs, "ndof_view_rotate_method", expand=True)

        row.separator()