Leaf Petersen
745f112ef6
Opt an initial batch of files under samples, samples-dev, utils, and runtime/tools/dartfuzz out of null safety in preparation for switching the flag on by default. Change-Id: Icdfd52a5a969e678a7205903332f73fe3841c223 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/166960 Reviewed-by: Daco Harkes <dacoharkes@google.com> Commit-Queue: Leaf Petersen <leafp@google.com>
94 lines
2.4 KiB
Dart
94 lines
2.4 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
|
|
// for details. All rights reserved. Use of this source code is governed by a
|
|
// BSD-style license that can be found in the LICENSE file.
|
|
|
|
// @dart = 2.9
|
|
|
|
part of view;
|
|
|
|
/**
|
|
* A View that is composed of child views.
|
|
*/
|
|
class CompositeView extends View {
|
|
List<View> childViews;
|
|
|
|
// TODO(rnystrom): Allowing this to be public is gross. CompositeView should
|
|
// encapsulate its markup and provide accessors to do the limited amount of
|
|
// things that external users need to access this for.
|
|
Element container;
|
|
|
|
Scroller scroller;
|
|
Scrollbar _scrollbar;
|
|
|
|
final String _cssName;
|
|
final bool _scrollable;
|
|
final bool _vertical;
|
|
final bool _nestedContainer;
|
|
final bool _showScrollbar;
|
|
|
|
CompositeView(String this._cssName,
|
|
[nestedContainer = false,
|
|
scrollable = false,
|
|
vertical = false,
|
|
showScrollbar = false])
|
|
: _nestedContainer = nestedContainer,
|
|
_scrollable = scrollable,
|
|
_vertical = vertical,
|
|
_showScrollbar = showScrollbar,
|
|
childViews = new List<View>() {}
|
|
|
|
Element render() {
|
|
Element node = new Element.html('<div class="$_cssName"></div>');
|
|
|
|
if (_nestedContainer) {
|
|
container = new Element.html('<div class="scroll-container"></div>');
|
|
node.nodes.add(container);
|
|
} else {
|
|
container = node;
|
|
}
|
|
|
|
if (_scrollable) {
|
|
scroller = new Scroller(
|
|
container,
|
|
_vertical /* verticalScrollEnabled */,
|
|
!_vertical /* horizontalScrollEnabled */,
|
|
true /* momementumEnabled */);
|
|
if (_showScrollbar) {
|
|
_scrollbar = new Scrollbar(scroller);
|
|
}
|
|
}
|
|
|
|
for (View childView in childViews) {
|
|
container.nodes.add(childView.node);
|
|
}
|
|
|
|
return node;
|
|
}
|
|
|
|
void afterRender(Element node) {
|
|
if (_scrollbar != null) {
|
|
_scrollbar.initialize();
|
|
}
|
|
}
|
|
|
|
View addChild(View view) {
|
|
childViews.add(view);
|
|
// TODO(rnystrom): Container shouldn't be null. Remove this check.
|
|
if (container != null) {
|
|
container.nodes.add(view.node);
|
|
}
|
|
childViewAdded(view);
|
|
return view;
|
|
}
|
|
|
|
void removeChild(View view) {
|
|
childViews = childViews.where((e) {
|
|
return view != e;
|
|
}).toList();
|
|
// TODO(rnystrom): Container shouldn't be null. Remove this check.
|
|
if (container != null) {
|
|
view.node.remove();
|
|
}
|
|
}
|
|
}
|