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Add a new SimpleRenderer to handle simple cases.
Easiest usage is to return NewSimpleRenderer(myObj) from CreateRenderer Fixes fyne-io#709
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,23 +1,71 @@ | ||
| // Package main loads a very basic Hello World graphical application. | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "image/color" | ||
| "math/rand" | ||
| "time" | ||
|
|
||
| "fyne.io/fyne/v2" | ||
| "fyne.io/fyne/v2/app" | ||
| "fyne.io/fyne/v2/canvas" | ||
| "fyne.io/fyne/v2/container" | ||
| "fyne.io/fyne/v2/widget" | ||
| "fyne.io/fyne/v2/theme" | ||
| ) | ||
|
|
||
| func main() { | ||
| a := app.New() | ||
| w := a.NewWindow("Hello") | ||
|
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| hello := widget.NewLabel("Hello Fyne!") | ||
| w.SetContent(container.NewVBox( | ||
| hello, | ||
| widget.NewButton("Hi!", func() { | ||
| hello.SetText("Welcome :)") | ||
| }), | ||
| )) | ||
|
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| w.ShowAndRun() | ||
| myApp := app.New() | ||
| myWindow := myApp.NewWindow("Lines") | ||
|
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| c := container.NewWithoutLayout() | ||
| lps := canvas.NewText("- lps", color.White) | ||
| sig := canvas.NewRectangle(theme.BackgroundColor()) | ||
| myWindow.SetContent(container.NewBorder(lps, nil, nil, nil, container.NewMax(sig, c))) | ||
| myWindow.Resize(fyne.NewSize(400, 400)) | ||
| myWindow.SetPadded(false) | ||
|
|
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| drawn := 0 | ||
| r := uint8(0) | ||
| g := uint8(0) | ||
| go func() { | ||
| pos := fyne.NewPos(0, 0) | ||
| for { | ||
| newPos := fyne.NewPos(float32(rand.Intn(400)), float32(rand.Intn(400))) | ||
|
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| line := canvas.NewLine(color.NRGBA{R: r, G: g, B: 250, A: 255}) | ||
| g++ | ||
| if g >= 255 { | ||
| g = 0 | ||
| } | ||
| if g%10 == 0 { | ||
| r++ | ||
| if r >= 255 { | ||
| r = 0 | ||
| } | ||
| } | ||
| line.Position1 = pos | ||
| line.Position2 = newPos | ||
|
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| c.Objects = append(c.Objects, line) | ||
| if len(c.Objects) > 1024 { | ||
| c.Objects = c.Objects[1:1025] | ||
| } | ||
| pos = newPos | ||
|
|
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| canvas.Refresh(sig) | ||
| drawn++ | ||
| time.Sleep(time.Millisecond / 8) | ||
| } | ||
| }() | ||
|
|
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| go func() { | ||
| for { | ||
| time.Sleep(time.Second) | ||
| lps.Text = fmt.Sprintf("%d lps", drawn) | ||
| lps.Refresh() | ||
| drawn = 0 | ||
| } | ||
| }() | ||
|
|
||
| myWindow.ShowAndRun() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| package widget | ||
|
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| import "fyne.io/fyne/v2" | ||
|
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| var _ fyne.WidgetRenderer = (*SimpleRenderer)(nil) | ||
|
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| // SimpleRenderer is a basic renderer that satisfies widget.Renderer interface by wrapping | ||
| // a single fyne.CanvasObject. | ||
| // | ||
| // Since: 2.1 | ||
| type SimpleRenderer struct { | ||
| object fyne.CanvasObject | ||
| } | ||
|
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| // NewSimpleRenderer creates a new BaseRenderer. | ||
| // | ||
| // Since: 2.1 | ||
| func NewSimpleRenderer(object fyne.CanvasObject) *SimpleRenderer { | ||
| return &SimpleRenderer{object} | ||
| } | ||
|
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| // Destroy does nothing in the base implementation. | ||
| // | ||
| // Implements: fyne.WidgetRenderer | ||
| // | ||
| // Since: 2.1 | ||
| func (r *SimpleRenderer) Destroy() { | ||
| } | ||
|
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| // Layout updates the contained object to be the requested size. | ||
| // | ||
| // Implements: fyne.WidgetRenderer | ||
| // | ||
| // Since: 2.1 | ||
| func (r *SimpleRenderer) Layout(s fyne.Size) { | ||
| r.object.Resize(s) | ||
| } | ||
|
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| // MinSize returns the smallest size that this render can use, returned from the underlying object. | ||
| // | ||
| // Implements: fyne.WidgetRenderer | ||
| // | ||
| // Since: 2.1 | ||
| func (r *SimpleRenderer) MinSize() fyne.Size { | ||
| return r.object.MinSize() | ||
| } | ||
|
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| // Objects returns the objects that should be rendered. | ||
| // | ||
| // Implements: fyne.WidgetRenderer | ||
| // | ||
| // Since: 2.1 | ||
| func (r *SimpleRenderer) Objects() []fyne.CanvasObject { | ||
| return []fyne.CanvasObject{r.object} | ||
| } | ||
|
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| // Refresh requests the underlying object to redraw. | ||
| // | ||
| // Implements: fyne.WidgetRenderer | ||
| // | ||
| // Since: 2.1 | ||
| func (r *SimpleRenderer) Refresh() { | ||
| r.object.Refresh() | ||
| } |
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