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Use WindowPadding class to represent view insets (flutter/engine#4406)

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This drops the ViewInsets class in favour of the existing WindowPadding
class for representing the view insets.
This commit is contained in:
Chris Bracken
2017-11-30 10:47:14 -08:00
committed by GitHub
parent a8d051c664
commit 6ae141180c
2 changed files with 11 additions and 45 deletions
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2
engine/src/flutter/lib/ui/hooks.dart
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@@ -31,7 +31,7 @@ void _updateWindowMetrics(double devicePixelRatio,
right: paddingRight,
bottom: paddingBottom,
left: paddingLeft)
.._viewInsets = new ViewInsets._(
.._viewInsets = new WindowPadding._(
top: viewInsetTop,
right: viewInsetRight,
bottom: viewInsetBottom,

54
engine/src/flutter/lib/ui/window.dart
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@@ -72,44 +72,10 @@ enum AppLifecycleState {
suspending,
}
/// A representation of the insets relative to each side of the window into
/// which the application can render, but over which the operating system will
/// likely place system UI, such as the keyboard, that fully obscures any
/// content. These insets are exposed by [Window.viewInsets] and preferrably
/// read via [MediaQuery.of].
///
/// For a generic class that represents distances around a rectangle, see the
/// [EdgeInsets] class.
///
/// See also:
///
/// * [WidgetsBindingObserver], for a widgets layer mechanism to receive
/// notifications when the margin changes.
/// * [MediaQuery.of], for the preferred mechanism for accessing this value.
/// * [Scaffold], which automatically applies the view insets in material
/// design applications.
class ViewInsets {
const ViewInsets._({ this.left, this.top, this.right, this.bottom });
/// The distance from the left edge to the first unobscured pixel, in physical pixels.
final double left;
/// The distance from the top edge to the first unobscured pixel, in physical pixels.
final double top;
/// The distance from the right edge to the first unobscured pixel, in physical pixels.
final double right;
/// The distance from the bottom edge to the first unobscured pixel, in physical pixels.
final double bottom;
/// A view inset that has zeros for each edge.
static const ViewInsets zero = const ViewInsets._(left: 0.0, top: 0.0, right: 0.0, bottom: 0.0);
}
/// A representation of distances for each of the four edges of a rectangle,
/// used to encode the padding that applications should place around their user
/// interface, as exposed by [Window.padding] and preferrably read via
/// used to encode the view insets and padding that applications should place
/// around their user interface, as exposed by [Window.viewInsets] and
/// [Window.padding]. View insets and padding are preferrably read via
/// [MediaQuery.of].
///
/// For a generic class that represents distances around a rectangle, see the
@@ -119,22 +85,22 @@ class ViewInsets {
///
/// * [WidgetsBindingObserver], for a widgets layer mechanism to receive
/// notifications when the padding changes.
/// * [MediaQuery.of], for the preferred mechanism for accessing this value.
/// * [MediaQuery.of], for the preferred mechanism for accessing these values.
/// * [Scaffold], which automatically applies the padding in material design
/// applications.
class WindowPadding {
const WindowPadding._({ this.left, this.top, this.right, this.bottom });
/// The distance from the left edge to the first unobscured pixel, in physical pixels.
/// The distance from the left edge to the first unpadded pixel, in physical pixels.
final double left;
/// The distance from the top edge to the first unobscured pixel, in physical pixels.
/// The distance from the top edge to the first unpadded pixel, in physical pixels.
final double top;
/// The distance from the right edge to the first unobscured pixel, in physical pixels.
/// The distance from the right edge to the first unpadded pixel, in physical pixels.
final double right;
/// The distance from the bottom edge to the first unobscured pixel, in physical pixels.
/// The distance from the bottom edge to the first unpadded pixel, in physical pixels.
final double bottom;
/// A window padding that has zeros for each edge.
@@ -240,8 +206,8 @@ class Window {
/// * [MediaQuery.of], a simpler mechanism for the same.
/// * [Scaffold], which automatically applies the view insets in material
/// design applications.
ViewInsets get viewInsets => _viewInsets;
ViewInsets _viewInsets = ViewInsets.zero;
WindowPadding get viewInsets => _viewInsets;
WindowPadding _viewInsets = WindowPadding.zero;
/// The number of physical pixels on each side of the display rectangle into
/// which the application can render, but which may be partially obscured by