go-gtk3开发之进度条控件(10)

案例说明

添加进度条控件，设置进度以及获取进度值。

demo.go

package main

import (
	"fmt"
	"github.com/gotk3/gotk3/glib"
	"github.com/gotk3/gotk3/gtk"
	"log"
	"os"
)

func main() {
	const appId = "com.nayoso.example"
	app, _ := gtk.ApplicationNew(appId, glib.APPLICATION_FLAGS_NONE)
	_, err := app.Connect("activate", func() {
		createWindow(app)
	})
	if err != nil {
		log.Fatal(err)
	}

	app.Run(os.Args)
}

func createWindow(application *gtk.Application) {
	// 从文件中创建Builder
	builder, err := gtk.BuilderNewFromFile("8_进度条/builder.ui")
	if err != nil {
		log.Fatal(err)
	}

	// 获取window窗口
	winObj, _ := builder.GetObject("window1")
	window := winObj.(*gtk.Window)
	application.AddWindow(window)

	// window 窗口设置
	window.SetSizeRequest(300, 240)                //设置窗口大小
	window.SetTitle("hello go")                    //设置标题
	window.SetResizable(false)                     //设置不可伸缩
	window.SetPosition(gtk.WIN_POS_CENTER)         //设置居中显示
	err = window.SetIconFromFile("images/app.ico") //设置icon
	if err != nil {
		log.Fatal(err)
	}

	//获取进度条控件
	pbObj, err := builder.GetObject("progressbar1")
	if err != nil {
		log.Fatal(err)
	}
	pb := pbObj.(*gtk.ProgressBar)

	//设置进度, 范围0.0~1.0
	pb.SetFraction(0.5)

	//设置进度条显示的文本
	pb.SetText("50%")

	//获取进度
	value := pb.GetFraction()
	fmt.Println("value = ", value)

	// 显示所有界面
	window.ShowAll()
}

builder.ui

<?xml version="1.0" encoding="UTF-8"?>
<interface>
  <requires lib="gtk+" version="2.24"/>
  <!-- interface-naming-policy project-wide -->
  <object class="GtkWindow" id="window1">
    <property name="can_focus">False</property>
    <child>
      <object class="GtkFixed" id="fixed1">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <child>
          <object class="GtkProgressBar" id="progressbar1">
            <property name="width_request">100</property>
            <property name="height_request">80</property>
            <property name="visible">True</property>
            <property name="can_focus">False</property>
          </object>
          <packing>
            <property name="x">130</property>
            <property name="y">100</property>
          </packing>
        </child>
      </object>
    </child>
  </object>
</interface>