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Scene and GUI rework (OpenDiablo2#300)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| package d2gui | ||
|
|
||
| import ( | ||
| "errors" | ||
|
|
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| "github.com/OpenDiablo2/OpenDiablo2/d2core/d2render" | ||
| ) | ||
|
|
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| var ( | ||
| ErrWasInit = errors.New("gui system is already initialized") | ||
| ErrNotInit = errors.New("gui system is not initialized") | ||
| ) | ||
|
|
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| var singleton *guiManager | ||
|
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| func Initialize() error { | ||
| assertNotInit() | ||
|
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| var err error | ||
| if singleton, err = createGuiManager(); err != nil { | ||
| return err | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
|
||
| func Shutdown() { | ||
| singleton = nil | ||
| } | ||
|
|
||
| func Render(target d2render.Surface) error { | ||
| assertWasInit() | ||
| return singleton.render(target) | ||
| } | ||
|
|
||
| func Advance(elapsed float64) error { | ||
| assertWasInit() | ||
| return singleton.advance(elapsed) | ||
| } | ||
|
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| func Clear() { | ||
| assertWasInit() | ||
| singleton.clear() | ||
| } | ||
|
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| func ShowLoadScreen(progress float64) { | ||
| assertWasInit() | ||
| singleton.showLoadScreen(progress) | ||
| } | ||
|
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| func HideLoadScreen() { | ||
| assertWasInit() | ||
| singleton.hideLoadScreen() | ||
| } | ||
|
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| func ShowCursor() { | ||
| assertWasInit() | ||
| singleton.showCursor() | ||
| } | ||
|
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| func HideCursor() { | ||
| assertWasInit() | ||
| singleton.hideCursor() | ||
| } | ||
|
|
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| func assertWasInit() { | ||
| if singleton == nil { | ||
| panic(ErrNotInit) | ||
| } | ||
| } | ||
|
|
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| func assertNotInit() { | ||
| if singleton != nil { | ||
| panic(ErrWasInit) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| package d2gui | ||
|
|
||
| import ( | ||
| "image/color" | ||
| "math" | ||
|
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| "github.com/OpenDiablo2/OpenDiablo2/d2common/d2resource" | ||
| "github.com/OpenDiablo2/OpenDiablo2/d2core/d2input" | ||
| "github.com/OpenDiablo2/OpenDiablo2/d2core/d2render" | ||
| ) | ||
|
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| type guiWidget interface { | ||
| getLayer() int | ||
| render(target d2render.Surface) error | ||
| advance(elapsed float64) error | ||
| } | ||
|
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| type guiManager struct { | ||
| cursorSprite *Sprite | ||
| loadSprite *Sprite | ||
| widgets []guiWidget | ||
| loading bool | ||
| } | ||
|
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| func createGuiManager() (*guiManager, error) { | ||
| cursorSprite, err := CreateSprite(d2resource.CursorDefault, d2resource.PaletteUnits) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| loadSprite, err := CreateSprite(d2resource.LoadingScreen, d2resource.PaletteLoading) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| width, height := loadSprite.getSize() | ||
| loadSprite.SetPosition(400-width/2, 300+height/2) | ||
|
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| manager := &guiManager{ | ||
| cursorSprite: cursorSprite, | ||
| loadSprite: loadSprite, | ||
| } | ||
|
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| if err := d2input.BindHandler(manager); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return manager, nil | ||
| } | ||
|
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| func (gui *guiManager) OnMouseMove(event d2input.MouseMoveEvent) bool { | ||
| gui.cursorSprite.SetPosition(event.X, event.Y) | ||
| return false | ||
| } | ||
|
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| func (gui *guiManager) render(target d2render.Surface) error { | ||
| if gui.loading { | ||
| target.Clear(color.Black) | ||
| if err := gui.loadSprite.render(target); err != nil { | ||
| return err | ||
| } | ||
| } else { | ||
| for _, widget := range gui.widgets { | ||
| if err := widget.render(target); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
|
|
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| if err := gui.cursorSprite.render(target); err != nil { | ||
| return err | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
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| func (gui *guiManager) advance(elapsed float64) error { | ||
| if gui.loading { | ||
| gui.loadSprite.Show() | ||
| if err := gui.loadSprite.advance(elapsed); err != nil { | ||
| return err | ||
| } | ||
| } else { | ||
| gui.loadSprite.Hide() | ||
| for _, widget := range gui.widgets { | ||
| if err := widget.advance(elapsed); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
|
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| if err := gui.loadSprite.advance(elapsed); err != nil { | ||
| return err | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
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| func (gui *guiManager) showLoadScreen(progress float64) { | ||
| progress = math.Min(progress, 1.0) | ||
| progress = math.Max(progress, 0.0) | ||
|
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| animation := gui.loadSprite.animation | ||
| frameCount := animation.GetFrameCount() | ||
| animation.SetCurrentFrame(int(float64(frameCount-1.0) * progress)) | ||
|
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| gui.loading = true | ||
| } | ||
|
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| func (gui *guiManager) hideLoadScreen() { | ||
| gui.loading = false | ||
| } | ||
|
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| func (gui *guiManager) showCursor() { | ||
| gui.cursorSprite.Show() | ||
| } | ||
|
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| func (gui *guiManager) hideCursor() { | ||
| gui.cursorSprite.Hide() | ||
| } | ||
|
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| func (gui *guiManager) clear() { | ||
| gui.widgets = nil | ||
| gui.hideLoadScreen() | ||
| } |
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