forked from fyne-io/fyne
/
canvas.go
39 lines (32 loc) · 1.12 KB
/
canvas.go
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package main
import (
"image/color"
"fyne.io/fyne"
"fyne.io/fyne/canvas"
"fyne.io/fyne/layout"
"fyne.io/fyne/theme"
)
func rgbGradient(x, y, w, h int) color.Color {
g := int(float32(x) / float32(w) * float32(255))
b := int(float32(y) / float32(h) * float32(255))
return color.RGBA{uint8(255 - b), uint8(g), uint8(b), 0xff}
}
// Canvas loads a canvas example window for the specified app context
func Canvas(app fyne.App) {
w := app.NewWindow("Canvas")
content := fyne.NewContainer(
canvas.NewText("Resize me", color.RGBA{0, 0x80, 0, 0xff}),
&canvas.Rectangle{FillColor: color.RGBA{0x80, 0, 0, 0xff},
StrokeColor: color.RGBA{0xff, 0xff, 0xff, 0xff},
StrokeWidth: 1},
canvas.NewRasterWithPixels(rgbGradient),
canvas.NewImageFromResource(theme.FyneLogo()),
canvas.NewImageFromResource(theme.ContentCutIcon()),
&canvas.Line{StrokeColor: color.RGBA{0, 0, 0x80, 0xff}, StrokeWidth: 5},
&canvas.Circle{StrokeColor: color.RGBA{0, 0, 0x80, 0xff},
FillColor: color.RGBA{0x30, 0x30, 0x30, 0x60},
StrokeWidth: 2})
content.Layout = layout.NewFixedGridLayout(fyne.NewSize(93, 93))
w.SetContent(content)
w.Show()
}