76 lines
2.3 KiB
Go
76 lines
2.3 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Package config defines an event for the dimensions and physical resolution
|
|
// of the app's window.
|
|
//
|
|
// See the golang.org/x/mobile/app package for details on the event model.
|
|
package config // import "golang.org/x/mobile/event/config"
|
|
|
|
import (
|
|
"image"
|
|
|
|
"golang.org/x/mobile/geom"
|
|
)
|
|
|
|
// Event holds the dimensions and physical resolution of the app's window.
|
|
type Event struct {
|
|
// WidthPx and HeightPx are the window's dimensions in pixels.
|
|
WidthPx, HeightPx int
|
|
|
|
// WidthPt and HeightPt are the window's dimensions in points (1/72 of an
|
|
// inch).
|
|
WidthPt, HeightPt geom.Pt
|
|
|
|
// PixelsPerPt is the window's physical resolution. It is the number of
|
|
// pixels in a single geom.Pt, from the golang.org/x/mobile/geom package.
|
|
//
|
|
// There are a wide variety of pixel densities in existing phones and
|
|
// tablets, so apps should be written to expect various non-integer
|
|
// PixelsPerPt values. In general, work in geom.Pt.
|
|
PixelsPerPt float32
|
|
|
|
// Orientation is the orientation of the device screen.
|
|
Orientation Orientation
|
|
}
|
|
|
|
// Bounds returns the window's bounds in pixels, at the time this configuration
|
|
// event was sent.
|
|
//
|
|
// The top-left pixel is always (0, 0). The bottom-right pixel is given by the
|
|
// width and height.
|
|
func (e *Event) Bounds() image.Rectangle {
|
|
return image.Rectangle{Max: image.Point{e.WidthPx, e.HeightPx}}
|
|
}
|
|
|
|
// Orientation is the orientation of the device screen.
|
|
type Orientation int
|
|
|
|
const (
|
|
// OrientationUnknown means device orientation cannot be determined.
|
|
//
|
|
// Equivalent on Android to Configuration.ORIENTATION_UNKNOWN
|
|
// and on iOS to:
|
|
// UIDeviceOrientationUnknown
|
|
// UIDeviceOrientationFaceUp
|
|
// UIDeviceOrientationFaceDown
|
|
OrientationUnknown Orientation = iota
|
|
|
|
// OrientationPortrait is a device oriented so it is tall and thin.
|
|
//
|
|
// Equivalent on Android to Configuration.ORIENTATION_PORTRAIT
|
|
// and on iOS to:
|
|
// UIDeviceOrientationPortrait
|
|
// UIDeviceOrientationPortraitUpsideDown
|
|
OrientationPortrait
|
|
|
|
// OrientationLandscape is a device oriented so it is short and wide.
|
|
//
|
|
// Equivalent on Android to Configuration.ORIENTATION_LANDSCAPE
|
|
// and on iOS to:
|
|
// UIDeviceOrientationLandscapeLeft
|
|
// UIDeviceOrientationLandscapeRight
|
|
OrientationLandscape
|
|
)
|