• 绘制与动画
  • 矩形/Rectangle
  • 文本/Text

绘制与动画

矩形/Rectangle

canvas.Rectangle is the simplest canvas object in Fyne. It displays a block of the specified colour. You can also set the colour using the FillColor field.

In this example the rectangle fills the window as it is the only content element.

package main

import (
	"image/color"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/canvas"
)

func main() {
	myApp := app.New()
	w := myApp.NewWindow("Rectangle")

	rect := canvas.NewRectangle(color.White)
	w.SetContent(rect)

	w.Resize(fyne.NewSize(150, 100))
	w.ShowAndRun()
}

Other fyne.CanvasObject types have more configuration, let us look next at canvas.Text.

文本/Text

canvas.Text is used for all text rendering within Fyne. It is created by specifying the text and colour for the text. Text is rendered using the default font, specified by the current theme.

The text object allows certain configuration like the Alignment and TextStyle field. as illustrated in the example here. To use a monospaced font instead you can specify fyne.TextStyle{Monospace: true}.

package main

import (
	"image/color"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/canvas"
)

func main() {
	myApp := app.New()
	w := myApp.NewWindow("Text")

	text := canvas.NewText("Text Object", color.White)
	text.Alignment = fyne.TextAlignTrailing
	text.TextStyle = fyne.TextStyle{Italic: true}
	w.SetContent(text)

	w.ShowAndRun()
}

It is possible to use an alternative font by specifying a FYNE_FONT environment variable. Use this to set a .ttf file to use instead of the one provided in the Fyne toolkit or the current theme.

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