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Elias Naur
cb1e605203
In the early days of Gio, FrameEvent was part of package app. It was moved to package system to enable layout.NewContext be a convenient short-hand for constructing a layout. However, it seems the better design to leave FrameEvent (and Insets) in package app, and move layout.NewContext there as well. More importantly, the move allows us to replace the event.Queue interface with a concrete type. Signed-off-by: Elias Naur <mail@eliasnaur.com>
52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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// Package system contains events usually handled at the top-level
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// program level.
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package system
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// DestroyEvent is the last event sent through
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// a window event channel.
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type DestroyEvent struct {
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// Err is nil for normal window closures. If a
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// window is prematurely closed, Err is the cause.
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Err error
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}
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// A StageEvent is generated whenever the stage of a
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// Window changes.
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type StageEvent struct {
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Stage Stage
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}
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// Stage of a Window.
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type Stage uint8
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const (
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// StagePaused is the stage for windows that have no on-screen representation.
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// Paused windows don't receive frames.
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StagePaused Stage = iota
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// StageInactive is the stage for windows that are visible, but not active.
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// Inactive windows receive frames.
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StageInactive
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// StageRunning is for active and visible Windows.
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// Running windows receive frames.
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StageRunning
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)
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// String implements fmt.Stringer.
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func (l Stage) String() string {
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switch l {
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case StagePaused:
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return "StagePaused"
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case StageInactive:
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return "StageInactive"
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case StageRunning:
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return "StageRunning"
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default:
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panic("unexpected Stage value")
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}
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}
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func (StageEvent) ImplementsEvent() {}
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func (DestroyEvent) ImplementsEvent() {}
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