125 lines
2.2 KiB
Go
125 lines
2.2 KiB
Go
package alui
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import (
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"errors"
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"github.com/spf13/afero"
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"opslag.de/schobers/allg5"
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"opslag.de/schobers/fs/vfs"
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"opslag.de/schobers/geom"
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)
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type Application struct {
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disp *allg5.Display
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eq *allg5.EventQueue
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dirs map[string]vfs.CopyDir
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}
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func NewApplication(size geom.Point, dispOptions allg5.NewDisplayOptions) (*Application, error) {
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var init = allg5.InitAll
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init.Audio = false
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err := allg5.Init(init)
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if err != nil {
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return nil, err
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}
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app := &Application{}
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disp, err := allg5.NewDisplay(size.X, size.Y, dispOptions)
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if err != nil {
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return nil, err
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}
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app.disp = disp
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eq, err := allg5.NewEventQueue()
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if err != nil {
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app.Destroy()
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return nil, err
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}
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app.eq = eq
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eq.RegisterDisplay(disp)
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eq.RegisterKeyboard()
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eq.RegisterMouse()
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return app, nil
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}
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func (a *Application) Destroy() {
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a.disp.Destroy()
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a.eq.Destroy()
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if a.dirs != nil {
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for _, dir := range a.dirs {
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dir.Destroy()
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}
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}
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}
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func (a *Application) AddDir(path string, backup afero.Fs) (vfs.CopyDir, error) {
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fs := vfs.NewOsFsFallback(path, backup)
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copy, err := vfs.NewCopyDir(fs)
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if err != nil {
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return nil, err
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}
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if a.dirs == nil {
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a.dirs = map[string]vfs.CopyDir{}
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}
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a.dirs[path] = copy
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return copy, nil
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}
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func (a *Application) UseFile(dir, name string, use func(string) error) error {
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if a.dirs == nil {
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return errors.New(`no directories available`)
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}
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resources, ok := a.dirs[dir]
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if !ok {
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return errors.New(`direct not found`)
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}
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path, err := resources.Retrieve(name)
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if err != nil {
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return err
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}
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return use(path)
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}
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func (a *Application) Run(main Control, init func(*UI) error) error {
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disp := a.disp
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eq := a.eq
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ui := NewUI(disp, main)
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defer ui.Destroy()
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err := init(ui)
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if err != nil {
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return err
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}
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ctx := ui.Context()
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for {
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allg5.ClearToColor(ctx.Palette.Background)
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ui.Render()
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disp.Flip()
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if ctx.quit {
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return nil
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}
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e := eq.Get()
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for e != nil {
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switch e := e.(type) {
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case *allg5.DisplayCloseEvent:
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return nil
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case *allg5.KeyCharEvent:
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if e.KeyCode == allg5.KeyF4 && e.Modifiers&allg5.KeyModAlt != 0 {
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return nil
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}
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}
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ui.Handle(e)
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if ctx.quit {
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return nil
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}
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e = eq.Get()
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}
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}
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}
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