54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package layout
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import (
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"time"
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"github.com/mleku/gio/io/input"
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"github.com/mleku/gio/io/system"
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"github.com/mleku/gio/op"
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"github.com/mleku/gio/unit"
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)
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// Context carries the state needed by almost all layouts and widgets.
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// A zero value Context never returns events, map units to pixels
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// with a scale of 1.0, and returns the zero time from Now.
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type Context struct {
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// Constraints track the constraints for the active widget or
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// layout.
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Constraints Constraints
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Metric unit.Metric
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// Now is the animation time.
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Now time.Time
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// Locale provides information on the system's language preferences.
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// BUG(whereswaldon): this field is not currently populated automatically.
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// Interested users must look up and populate these values manually.
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Locale system.Locale
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// Values is a map of program global data associated with the context.
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// It is not for use by widgets.
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Values map[string]any
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input.Source
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*op.Ops
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}
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// Dp converts v to pixels.
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func (c Context) Dp(v unit.Dp) int {
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return c.Metric.Dp(v)
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}
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// Sp converts v to pixels.
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func (c Context) Sp(v unit.Sp) int {
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return c.Metric.Sp(v)
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}
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// Disabled returns a copy of this context that don't deliver any events.
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func (c Context) Disabled() Context {
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c.Source = c.Source.Disabled()
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return c
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}
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