Sander Schobers
b14f79a61a
Added more icons and placed buttons on the bars. Implemented pause/run/fast.
51 lines
1.0 KiB
Go
51 lines
1.0 KiB
Go
package tins2020
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import "github.com/veandco/go-sdl2/sdl"
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type Control interface {
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Init(*Context) error
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Arrange(*Context, Rectangle)
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Handle(*Context, sdl.Event)
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Render(*Context)
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}
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type EventFn func(*Context)
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type EmptyEventFn func()
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func EmptyEvent(fn EmptyEventFn) EventFn {
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return func(*Context) { fn() }
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}
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type ControlBase struct {
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Bounds Rectangle
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IsMouseOver bool
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OnLeftMouseButtonClick EventFn
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}
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func (b *ControlBase) Arrange(ctx *Context, bounds Rectangle) { b.Bounds = bounds }
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func (b *ControlBase) Init(*Context) error { return nil }
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func (b *ControlBase) Handle(ctx *Context, event sdl.Event) {
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switch e := event.(type) {
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case *sdl.MouseMotionEvent:
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b.IsMouseOver = b.Bounds.IsPointInside(e.X, e.Y)
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case *sdl.MouseButtonEvent:
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if b.IsMouseOver && e.Button == sdl.BUTTON_LEFT && e.Type == sdl.MOUSEBUTTONDOWN {
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b.Invoke(ctx, b.OnLeftMouseButtonClick)
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}
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}
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}
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func (b *ControlBase) Invoke(ctx *Context, fn EventFn) {
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if fn == nil {
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return
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}
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fn(ctx)
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}
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func (b *ControlBase) Render(*Context) {}
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