Source code for enamlnative.android.android_scroll_view

"""
Copyright (c) 2017-2022, CodeLV.

Distributed under the terms of the MIT License.

The full license is in the file LICENSE, distributed with this software.

Created on May 20, 2017


"""
from atom.api import Instance
from enamlnative.widgets.scroll_view import ProxyScrollView
from .android_frame_layout import AndroidFrameLayout, FrameLayout
from .bridge import JavaMethod


class ScrollView(FrameLayout):
    __nativeclass__ = "android.widget.ScrollView"
    smoothScrollBy = JavaMethod(int, int)
    smoothScrollTo = JavaMethod(int, int)
    fullScroll = JavaMethod(int)

    FOCUS_UP = 0x00000021
    FOCUS_DOWN = 0x00000082

    setVerticalScrollBarEnabled = JavaMethod(bool)
    setHorizontalScrollBarEnabled = JavaMethod(bool)


class HorizontalScrollView(ScrollView):
    __nativeclass__ = "android.widget.HorizontalScrollView"


[docs]class AndroidScrollView(AndroidFrameLayout, ProxyScrollView):
    """An Android implementation of an Enaml ProxyFrameLayout."""

    #: A reference to the widget created by the proxy.
    widget = Instance(ScrollView)  # type: ignore

    # -------------------------------------------------------------------------
    # Initialization API
    # -------------------------------------------------------------------------
[docs]    def create_widget(self):
        """Create the underlying widget."""
        d = self.declaration
        if d.orientation == "vertical":
            self.widget = ScrollView(self.get_context(), None, d.style)
        else:
            self.widget = HorizontalScrollView(self.get_context(), None, d.style)

    # -------------------------------------------------------------------------
    # ProxyScrollView API
    # -------------------------------------------------------------------------
    def set_orientation(self, orientation):
        pass

    def set_scroll_by(self, delta):
        self.widget.smoothScrollBy(*delta)

    def set_scroll_to(self, point):
        if point in ("top", "bottom"):
            #: FOCUS_UP or FOCUS_DOWN
            #: TODO: This does not work!
            self.widget.fullScroll(
                ScrollView.FOCUS_UP if point == "top" else ScrollView.FOCUS_DOWN
            )
        else:
            self.widget.smoothScrollTo(*point)

    def set_scrollbars(self, scrollbars):
        w = self.widget
        v, h = (
            scrollbars in ("both", "vertical"),
            scrollbars in ("both", "horizontal"),
        )
        w.setHorizontalScrollBarEnabled(h)
        w.setVerticalScrollBarEnabled(v)