go-gtk3开发之对话框控件(16)

案例说明

创建按钮，绑定事件，点击按钮后弹出对话框。

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("14_对话框/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)
	}
	buttonObj1, _ := builder.GetObject("button1")
	buttonObj2, _ := builder.GetObject("button2")
	button1 := buttonObj1.(*gtk.Button)
	button2 := buttonObj2.(*gtk.Button)

	//信号处理
	_, _ = button1.Connect("clicked", func() {
		//新建消息对话框，选择对话框
		dialog := gtk.MessageDialogNew(
			window, //指定父窗口
			gtk.DIALOG_MODAL,              //模态对话框
			gtk.MESSAGE_QUESTION,          //指定对话框类型
			gtk.BUTTONS_YES_NO,            //默认按钮
			"Are u ok?") //设置内容

		dialog.SetTitle("问题对话框") //对话框设置标题

		flag := dialog.Run() //运行对话框
		if flag == gtk.RESPONSE_YES {
			fmt.Println("按下yes")
		} else if flag == gtk.RESPONSE_NO {
			fmt.Println("按下no")
		} else {
			fmt.Println("按下关闭按钮")
		}

		dialog.Destroy() //销毁对话框
	})

	_, _ = button2.Connect("clicked", func() {
		dialog := gtk.MessageDialogNew(
			window,           //指定父窗口
			gtk.DIALOG_MODAL, //模态对话框
			gtk.MESSAGE_INFO, //info类型
			gtk.BUTTONS_OK,   //默认按钮
			"结束了") //设置内容

		dialog.Run()     //运行对话框
		dialog.Destroy() //销毁对话框
	})

	// 显示所有界面
	window.ShowAll()
}

/*
信号标识	触发条件
“clicked”	按下按钮时触发
“pressed”	按下按钮时触发
“released”	释放按钮时触发
*/

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="GtkHBox" id="hbox1">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <child>
          <object class="GtkButton" id="button1">
            <property name="label" translatable="yes">问题对话框</property>
            <property name="use_action_appearance">False</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
          </object>
          <packing>
            <property name="expand">True</property>
            <property name="fill">True</property>
            <property name="position">0</property>
          </packing>
        </child>
        <child>
          <object class="GtkButton" id="button2">
            <property name="label" translatable="yes">消息对话框</property>
            <property name="use_action_appearance">False</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
          </object>
          <packing>
            <property name="expand">True</property>
            <property name="fill">True</property>
            <property name="position">1</property>
          </packing>
        </child>
      </object>
    </child>
  </object>
</interface>