user-interface - 如何更改 GUI 组件的颜色

Question

我正在尝试使用 fyne 的演示代码:

package main
import (
    "fyne.io/fyne/app"
    "fyne.io/fyne/widget"
)
func main() {
    a := app.New()
    w := a.NewWindow("Hello")
    w.SetContent(
        widget.NewVBox(
            widget.NewLabel("Hello Fyne!"),
            widget.NewButton("Quit", func(){a.Quit()} ),
        ),
    )
    w.ShowAndRun()
}

它运行正常，但我想将标签的颜色更改为蓝色，将按钮的颜色更改为绿色。我看到有 theme但这似乎适用于整个应用程序，而不适用于单个元素。

不同的颜色如何应用于不同的 GUI 组件？感谢您的帮助。

Answer 1

这是在 fyne-io/fyne issue 255 中提出的

I propose individual styles assignable to widgets:

但是:

Part of our design is to promote application consistency - a user experience that cannot be trivially compromised by "this label is larger" or "this dropdown is transparent".

Fyne's approach to this is that widgets have a set style (that can be themed) but the canvas remains fully available to do whatever specific designs a developer chooses to code.

因此 native 不支持更改单个按钮的颜色。

Andy Williams ，fyne-io/fyne 的作者/主要贡献者, 添加 in the comments :

This is quite correct.
The only way to have a widget that is is styled differently to the standard colours is to implement a custom widget and add that functionality yourself.

There are, however, some semantic styles, a button can be “primary, for example, in which case it will use the theme highlight color