79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
package widgets
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import (
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"github.com/divan/graphx/layout"
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"github.com/gopherjs/vecty"
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"github.com/gopherjs/vecty/elem"
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)
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// DefaultForcesConfig specifies default configuration for physics simulation.
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var DefaultForcesConfig = ForcesConfig{
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Config: layout.DefaultConfig,
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Steps: 10,
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}
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// ForceEditor represents forces and physics simulation configuration widget.
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type ForceEditor struct {
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vecty.Core
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config ForcesConfig
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repelling *ForceInput
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spring *ForceInput
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drag *ForceInput
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steps *Range
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}
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// ForcesConfig represents physics simulation configuration.
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type ForcesConfig struct {
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layout.Config
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Steps int
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}
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// Render implements vecty's Component interface for ForceEditor.
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func (l *ForceEditor) Render() vecty.ComponentOrHTML {
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return elem.Div(
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elem.Heading3(
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vecty.Text("Layout forces:"),
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),
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elem.Form(
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vecty.Markup(
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vecty.Class("pure-form"),
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),
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l.repelling,
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l.spring,
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l.drag,
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l.steps,
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),
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)
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}
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// NewForceEditor creates a new ForceEditor widget.
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func NewForceEditor() *ForceEditor {
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config := DefaultForcesConfig
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repelling := NewForceInput("Gravity force:", config.Repelling)
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spring := NewForceInput("Spring force:", config.SpringStiffness)
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drag := NewForceInput("Drag force:", config.DragCoeff)
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steps := NewRange("Steps:", config.Steps)
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return &ForceEditor{
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config: config,
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repelling: repelling,
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spring: spring,
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drag: drag,
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steps: steps,
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}
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}
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// Config returns current forces & simulation configuration, getting values from UI.
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func (l *ForceEditor) Config() ForcesConfig {
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return ForcesConfig{
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Steps: l.steps.Value(),
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Config: layout.Config{
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Repelling: l.repelling.Value(),
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SpringStiffness: l.spring.Value(),
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SpringLen: l.config.SpringLen,
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DragCoeff: l.drag.Value(),
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},
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}
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}
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