def __init__(self,
ui: UserInterface.UserInterface,
thumbnail_source: AbstractThumbnailSource,
size: typing.Optional[Geometry.IntSize] = None) -> None:
super().__init__()
bitmap_overlay_canvas_item = BitmapOverlayCanvasItem()
bitmap_canvas_item = CanvasItem.BitmapCanvasItem(
background_color="#CCC", border_color="#444")
bitmap_overlay_canvas_item.add_canvas_item(bitmap_canvas_item)
if size is not None:
bitmap_canvas_item.update_sizing(
bitmap_canvas_item.sizing.with_fixed_size(size))
thumbnail_source.overlay_canvas_item.update_sizing(
thumbnail_source.overlay_canvas_item.sizing.with_fixed_size(
size))
bitmap_overlay_canvas_item.add_canvas_item(
thumbnail_source.overlay_canvas_item)
self.__thumbnail_source = thumbnail_source
self.on_drag: typing.Optional[typing.Callable[[
UserInterface.MimeData, typing.Optional[_ImageDataType], int, int
], None]] = None
self.on_drop_mime_data: typing.Optional[typing.Callable[
[UserInterface.MimeData, int, int], str]] = None
self.on_delete: typing.Optional[typing.Callable[[], None]] = None
def drag_pressed(x: int, y: int,
modifiers: UserInterface.KeyboardModifiers) -> None:
on_drag = self.on_drag
if callable(on_drag):
mime_data = ui.create_mime_data()
valid, thumbnail = thumbnail_source.populate_mime_data_for_drag(
mime_data, Geometry.IntSize(width=80, height=80))
if valid:
on_drag(mime_data, thumbnail, x, y)
def drop_mime_data(mime_data: UserInterface.MimeData, x: int,
y: int) -> str:
if callable(self.on_drop_mime_data):
return self.on_drop_mime_data(mime_data, x, y)
return "ignore"
def delete() -> None:
on_delete = self.on_delete
if callable(on_delete):
on_delete()
bitmap_overlay_canvas_item.on_drag_pressed = drag_pressed
bitmap_overlay_canvas_item.on_drop_mime_data = drop_mime_data
bitmap_overlay_canvas_item.on_delete = delete
def thumbnail_data_changed(
thumbnail_data: typing.Optional[_NDArray]) -> None:
bitmap_canvas_item.rgba_bitmap_data = thumbnail_data
self.__thumbnail_source.on_thumbnail_data_changed = thumbnail_data_changed
bitmap_canvas_item.rgba_bitmap_data = self.__thumbnail_source.thumbnail_data
self.add_canvas_item(bitmap_overlay_canvas_item)
def __init__(self, ui, thumbnail_source: AbstractThumbnailSource,
size: Geometry.IntSize):
super().__init__()
bitmap_overlay_canvas_item = BitmapOverlayCanvasItem()
bitmap_canvas_item = CanvasItem.BitmapCanvasItem(
background_color="#CCC", border_color="#444")
bitmap_canvas_item.sizing.set_fixed_size(size)
bitmap_overlay_canvas_item.add_canvas_item(bitmap_canvas_item)
thumbnail_source.overlay_canvas_item.sizing.set_fixed_size(size)
bitmap_overlay_canvas_item.add_canvas_item(
thumbnail_source.overlay_canvas_item)
self.__thumbnail_source = thumbnail_source
self.on_drag = None
self.on_drop_mime_data = None
self.on_delete = None
def drag_pressed(x, y, modifiers):
on_drag = self.on_drag
if callable(on_drag):
mime_data = ui.create_mime_data()
valid, thumbnail = thumbnail_source.populate_mime_data_for_drag(
mime_data, size)
if valid:
on_drag(mime_data, thumbnail, x, y)
def drop_mime_data(mime_data: UserInterface.MimeData, x: int,
y: int) -> str:
if callable(self.on_drop_mime_data):
return self.on_drop_mime_data(mime_data, x, y)
return "ignore"
def delete():
on_delete = self.on_delete
if callable(on_delete):
on_delete()
bitmap_overlay_canvas_item.on_drag_pressed = drag_pressed
bitmap_overlay_canvas_item.on_drop_mime_data = drop_mime_data
bitmap_overlay_canvas_item.on_delete = delete
def thumbnail_data_changed(thumbnail_data):
bitmap_canvas_item.rgba_bitmap_data = thumbnail_data
self.__thumbnail_source.on_thumbnail_data_changed = thumbnail_data_changed
bitmap_canvas_item.rgba_bitmap_data = self.__thumbnail_source.thumbnail_data
self.add_canvas_item(bitmap_overlay_canvas_item)
