I hope to change the style of the widget when capturing the hover event. How can I do this?

[Seikaijyu]

package main

import (
	g "github.com/AllenDang/giu"
)

func loop() {
	var btn = g.Button("Hello").Size(120, 40)

	g.SingleWindow().Layout(btn,
		g.Event().OnHover(func() {
			g.Style().SetFontSize(50).To(btn).Build()
		}))

}

func main() {
	wnd := g.NewMasterWindow("example", 640, 480, 0)
	wnd.Run(loop)
}

I tried this, but it didn't work

[gucio321]

Ohh sadly you can't useEventHandler here... You need to use ConditionWidget or even CustomWidget. I'll write a code example for u in a while

[Seikaijyu]

I try to realize it with Ctrip, which seems to be OK. Will it bring any performance problems?
The code is as follows

package main

import (
	"github.com/AllenDang/giu"
	"golang.org/x/image/colornames"
	"time"
)

var isButtonHovered bool = false
var btn = giu.Style().To(giu.Button("Style Test Button").Size(160, 40))

func ref() {
	Interval := time.NewTicker(time.Millisecond)
	for {
		if isButtonHovered {
			btn.SetColor(giu.StyleColorText, colornames.Red)
			giu.SetMouseCursor(giu.MouseCursorHand)
		}
		giu.Update()
		<-Interval.C
	}
}
func loop() {
	giu.SingleWindow().Layout(
		giu.Custom(func() {
			if isButtonHovered {
				isButtonHovered = false
			} else {
				btn.SetColor(giu.StyleColorText, colornames.White)
				giu.SetMouseCursor(giu.MouseCursorArrow)

			}
		}),
		btn,
		giu.Event().OnHover(func() {
			isButtonHovered = true
		}),
	)

}

func main() {
	wnd := giu.NewMasterWindow("TestWindow", 640, 480, 0)
	go ref()
	wnd.Run(loop)
}

[Seikaijyu]

I have also tried non Ctrip to follow the implementation of the refresh speed of the loop function, which seems to be more CPU friendly
The code is as follows

package main

import (
	"github.com/AllenDang/giu"
	"golang.org/x/image/colornames"
)

var isButtonHovered bool = false

func loop() {
	var btn = giu.Style().To(giu.Button("Style Test Button").Size(160, 40))
	giu.SingleWindow().Layout(
		giu.Custom(func() {
			if isButtonHovered {
				btn.SetColor(giu.StyleColorText, colornames.Red)
				giu.SetMouseCursor(giu.MouseCursorHand)
				isButtonHovered = false
			} else {
				btn.SetColor(giu.StyleColorText, colornames.White)
				giu.SetMouseCursor(giu.MouseCursorArrow)

			}
			giu.Update()
		}),
		btn,
		giu.Event().OnHover(func() {
			isButtonHovered = true
		}),
	)

}

func main() {
	wnd := giu.NewMasterWindow("TestWindow", 640, 480, 0)
	wnd.Run(loop)
}

[Seikaijyu]

There is another small problem. What is the difference between PushColor and SetColor?
I don't understand what PushColor will do

[AllenDang]

SetColor is a wrapper of PushXXX() ... PopXXX().
PushColor means use specified color for a style, till PopColor is invoked.

[Seikaijyu]

Thank you for your reply