package main

import (
	"fmt"
	"os"

	"github.com/lxn/walk"
	"github.com/lxn/walk/declarative"
)

type MyMainWindow struct {
	*walk.MainWindow
	edit *walk.TextEdit
}

func main() {
	mw := &MyMainWindow{}
	err := declarative.MainWindow{
		AssignTo: &mw.MainWindow, //窗口重定向至mw，重定向后可由重定向变量控制控件
		// Icon:     "test.ico",     //窗体图标
		Title:   "文件选择对话框", //标题
		MinSize: declarative.Size{Width: 150, Height: 200},
		Size:    declarative.Size{300, 400},
		Layout:  declarative.VBox{}, //样式，纵向
		Children: []declarative.Widget{ //控件组
			declarative.TextEdit{
				AssignTo: &mw.edit,
			},
			declarative.PushButton{
				Text:      "打开",
				OnClicked: mw.selectFile, //点击事件响应函数
			},
		},
	}.Create() //创建

	if err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}

	mw.Run() //运行
}

func (mw *MyMainWindow) selectFile() {

	dlg := new(walk.FileDialog)
	dlg.Title = "选择文件"
	dlg.Filter = "可执行文件 (*.exe)|*.exe|所有文件 (*.*)|*.*"

	mw.edit.SetText("") //通过重定向变量设置TextEdit的Text
	if ok, err := dlg.ShowOpen(mw); err != nil {
		mw.edit.AppendText("Error : File Open\r\n")
		return
	} else if !ok {
		mw.edit.AppendText("Cancel\r\n")
		return
	}
	s := fmt.Sprintf("Select : %s\r\n", dlg.FilePath)
	mw.edit.AppendText(s)
}