90 lines
1.8 KiB
Go
90 lines
1.8 KiB
Go
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package ui
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import (
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"time"
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"opslag.de/schobers/galleg/allegro5"
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"opslag.de/schobers/geom"
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)
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type Control interface {
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Created(Context, Container) error
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Destroyed(Context)
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Update(Context, time.Duration)
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Handle(Context, allegro5.Event)
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DesiredSize(Context) geom.PointF
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SetRect(geom.RectangleF)
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Render(Context)
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}
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type MouseClickFn func(Control)
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var _ Control = &ControlBase{}
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type ControlBase struct {
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Parent Container
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Bounds geom.RectangleF
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Disabled bool
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IsOver bool
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IsPressed bool
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OnClick MouseClickFn
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MinSize geom.PointF
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Background *allegro5.Color
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}
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func (c *ControlBase) Created(_ Context, p Container) error {
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c.Parent = p
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return nil
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}
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func (c *ControlBase) Destroyed(Context) {}
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func (c *ControlBase) Update(Context, time.Duration) {}
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func (c *ControlBase) Handle(ctx Context, ev allegro5.Event) {
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switch e := ev.(type) {
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case *allegro5.MouseMoveEvent:
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c.IsOver = c.IsInRect(float64(e.X), float64(e.Y))
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case *allegro5.MouseButtonDownEvent:
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if c.IsOver {
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c.IsPressed = true
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}
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case *allegro5.MouseButtonUpEvent:
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if c.IsPressed && c.IsOver {
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var onClick = c.OnClick
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if nil != onClick {
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onClick(c)
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}
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}
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c.IsPressed = false
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}
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}
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func (c *ControlBase) DesiredSize(Context) geom.PointF {
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return c.MinSize
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}
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func (c *ControlBase) SetRect(rect geom.RectangleF) {
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c.Bounds = rect
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}
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func (c *ControlBase) Render(ctx Context) {
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var min = c.Bounds.Min.To32()
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var max = c.Bounds.Max.To32()
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if nil != c.Background {
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allegro5.DrawFilledRectangle(min.X, min.Y, max.X, max.Y, *c.Background)
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}
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if ctx.Debug().IsEnabled() {
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allegro5.DrawRectangle(min.X, min.Y, max.X, max.Y, ctx.Debug().Rainbow(), 5)
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}
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}
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func (c *ControlBase) Rect() geom.RectangleF {
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return c.Bounds
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}
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func (c *ControlBase) IsInRect(x, y float64) bool {
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return geom.PtF(x, y).In(c.Bounds)
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}
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