122 lines
2.0 KiB
Go
122 lines
2.0 KiB
Go
package ui
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import (
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"time"
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"opslag.de/schobers/zntg/allg5"
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)
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func shouldClose(ev allg5.Event) bool {
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switch e := ev.(type) {
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case *allg5.KeyCharEvent:
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switch e.KeyCode {
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case allg5.KeyEscape:
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return true
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case allg5.KeyF4:
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if e.Modifiers&allg5.KeyModAlt == allg5.KeyModAlt {
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return true
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}
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}
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case *allg5.DisplayCloseEvent:
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return true
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}
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return false
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}
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func shouldToggleDebug(ev allg5.Event) bool {
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switch e := ev.(type) {
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case *allg5.KeyCharEvent:
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switch e.KeyCode {
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case allg5.KeyD:
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return e.Modifiers&allg5.KeyModAlt == allg5.KeyModAlt
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}
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}
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return false
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}
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func switchState(ctx Context, curr State, s State) error {
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var err error
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err = curr.Leave(ctx)
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if nil != err {
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return err
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}
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return s.Enter(ctx)
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}
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func Init() error {
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return allg5.Init(allg5.InitAll)
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}
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func Run(w, h int, title string, s State, f Fonts, opts *allg5.NewDisplayOptions) error {
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if nil == opts {
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opts = &allg5.NewDisplayOptions{}
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}
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disp, err := allg5.NewDisplay(w, h, *opts)
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if nil != err {
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return err
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}
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disp.SetWindowTitle(title)
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defer disp.Destroy()
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evq, err := allg5.NewEventQueue()
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if nil != err {
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return err
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}
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evq.RegisterDisplay(disp)
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evq.RegisterKeyboard()
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evq.RegisterMouse()
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defer evq.Destroy()
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ctx := newContext(disp, f)
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var state = s
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err = state.Enter(ctx)
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if nil != err {
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return err
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}
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var t = time.Now()
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main:
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for nil != state {
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for ev := evq.Get(); ev != nil; ev = evq.Get() {
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if shouldClose(ev) {
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break main
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}
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if shouldToggleDebug(ev) {
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ctx.dbg.enbl = !ctx.dbg.enbl
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}
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err := state.Handle(ctx, ev)
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if nil != err {
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return err
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}
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}
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var now = time.Now()
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var dt = now.Sub(t)
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var s, err = state.Update(ctx, dt)
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if nil != err {
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return err
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}
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t = now
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if s != nil {
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err = switchState(ctx, state, s)
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if nil != err {
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return err
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}
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state = s
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}
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ctx.dbg.resetRainbow()
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err = state.Render(ctx)
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if nil != err {
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return err
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}
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disp.Flip()
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time.Sleep(10 * time.Millisecond)
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}
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err = state.Leave(ctx)
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if nil != err {
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return err
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}
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return nil
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}
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