93 lines
1.8 KiB
Go
93 lines
1.8 KiB
Go
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package gui
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import (
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"image/color"
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"github.com/hajimehoshi/ebiten/v2"
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"github.com/hajimehoshi/ebiten/v2/ebitenutil"
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"github.com/hajimehoshi/ebiten/v2/examples/resources/fonts"
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_ "embed"
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)
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type App struct {
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Root View
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Background color.Color
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defaultCtx *appCtx
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oldMouseEvent MouseEvent
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}
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func NewApp(root View) (*App, error) {
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fnt, err := LoadFontFromBytes(fonts.MPlus1pRegular_ttf)
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if err != nil {
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return nil, err
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}
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return &App{
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Root: root,
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Background: color.White,
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defaultCtx: &appCtx{
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font: fnt,
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fontSize: 16,
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fg: color.Black,
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bg: color.Transparent,
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},
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}, nil
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}
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func (a *App) Update() error {
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if a.Root == nil {
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return nil
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}
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winw, winh := ebiten.WindowSize()
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window := D(0, 0, winw, winh)
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// handle mouse events
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mouseEvent := makeMouseEvent()
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if mouseEvent.IsScrollEvent() {
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a.Root.OnMouseScroll(mouseEvent)
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}
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if mouseEvent.HasMouseMoved(a.oldMouseEvent) && mouseEvent.Position.In(window) {
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a.Root.OnMouseMove(mouseEvent)
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}
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if mouseEvent.Buttons.anyClicked() {
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a.Root.OnMouseClick(mouseEvent)
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}
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a.oldMouseEvent = mouseEvent
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return nil
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}
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func (a *App) Draw(screen *ebiten.Image) {
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if a.Root == nil {
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return
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}
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// layout phase
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a.Root.Layout(a.defaultCtx)
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// draw phase
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screen.Fill(a.Background)
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a.Root.Draw(newImage(screen), a.defaultCtx)
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// show fps
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ebitenutil.DebugPrint(screen, "") //fmt.Sprintf("fps: %g", ebiten.CurrentFPS()))
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}
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func (a *App) Layout(outsideWidth, outsideHeight int) (screenWidth, screenHeight int) {
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return outsideWidth, outsideHeight
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}
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func (a *App) Start() error {
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ebiten.SetScreenTransparent(true)
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ebiten.SetWindowResizingMode(ebiten.WindowResizingModeEnabled)
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//ebiten.SetFPSMode(ebiten.FPSModeVsyncOffMinimum)
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ebiten.SetFPSMode(ebiten.FPSModeVsyncOffMaximum)
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ebiten.SetRunnableOnUnfocused(true)
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return ebiten.RunGame(a)
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}
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