Go GUI---lxn/walk 自带demo学习---7.文件浏览器

如上图，从左到右用来TreeView、TableView、WebView

定义了一个名为Directory的目录结构体，每个目录理论上有一个父节点，有0到n个子节点。

type Directory struct {name     stringparent   *Directorychildren []*Directory
}

filebrowser.go

// Copyright 2011 The Walk Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.package mainimport ("log""os""path/filepath""time"
)import ("github.com/lxn/walk". "github.com/lxn/walk/declarative"
)type Directory struct {name     stringparent   *Directorychildren []*Directory
}func NewDirectory(name string, parent *Directory) *Directory {return &Directory{name: name, parent: parent}
}var _ walk.TreeItem = new(Directory)func (d *Directory) Text() string {return d.name
}func (d *Directory) Parent() walk.TreeItem {if d.parent == nil {// We can't simply return d.parent in this case, because the interface// value then would not be nil.return nil}return d.parent
}func (d *Directory) ChildCount() int {if d.children == nil {// It seems this is the first time our child count is checked, so we// use the opportunity to populate our direct children.if err := d.ResetChildren(); err != nil {log.Print(err)}}return len(d.children)
}func (d *Directory) ChildAt(index int) walk.TreeItem {return d.children[index]
}func (d *Directory) Image() interface{} {return d.Path()
}func (d *Directory) ResetChildren() error {d.children = nildirPath := d.Path()if err := filepath.Walk(d.Path(), func(path string, info os.FileInfo, err error) error {if err != nil {if info == nil {return filepath.SkipDir}}name := info.Name()if !info.IsDir() || path == dirPath || shouldExclude(name) {return nil}d.children = append(d.children, NewDirectory(name, d))return filepath.SkipDir}); err != nil {return err}return nil
}func (d *Directory) Path() string {elems := []string{d.name}dir, _ := d.Parent().(*Directory)for dir != nil {elems = append([]string{dir.name}, elems...)dir, _ = dir.Parent().(*Directory)}return filepath.Join(elems...)
}type DirectoryTreeModel struct {walk.TreeModelBaseroots []*Directory
}var _ walk.TreeModel = new(DirectoryTreeModel)func NewDirectoryTreeModel() (*DirectoryTreeModel, error) {model := new(DirectoryTreeModel)drives, err := walk.DriveNames()if err != nil {return nil, err}for _, drive := range drives {switch drive {case "A:\\", "B:\\":continue}model.roots = append(model.roots, NewDirectory(drive, nil))}return model, nil
}func (*DirectoryTreeModel) LazyPopulation() bool {// We don't want to eagerly populate our tree view with the whole file system.return true
}func (m *DirectoryTreeModel) RootCount() int {return len(m.roots)
}func (m *DirectoryTreeModel) RootAt(index int) walk.TreeItem {return m.roots[index]
}type FileInfo struct {Name     stringSize     int64Modified time.Time
}type FileInfoModel struct {walk.SortedReflectTableModelBasedirPath stringitems   []*FileInfo
}var _ walk.ReflectTableModel = new(FileInfoModel)func NewFileInfoModel() *FileInfoModel {return new(FileInfoModel)
}func (m *FileInfoModel) Items() interface{} {return m.items
}func (m *FileInfoModel) SetDirPath(dirPath string) error {m.dirPath = dirPathm.items = nilif err := filepath.Walk(dirPath, func(path string, info os.FileInfo, err error) error {if err != nil {if info == nil {return filepath.SkipDir}}name := info.Name()if path == dirPath || shouldExclude(name) {return nil}item := &FileInfo{Name:     name,Size:     info.Size(),Modified: info.ModTime(),}m.items = append(m.items, item)if info.IsDir() {return filepath.SkipDir}return nil}); err != nil {return err}m.PublishRowsReset()return nil
}func (m *FileInfoModel) Image(row int) interface{} {return filepath.Join(m.dirPath, m.items[row].Name)
}func shouldExclude(name string) bool {switch name {case "System Volume Information", "pagefile.sys", "swapfile.sys":return true}return false
}func main() {var mainWindow *walk.MainWindowvar splitter *walk.Splittervar treeView *walk.TreeViewvar tableView *walk.TableViewvar webView *walk.WebViewtreeModel, err := NewDirectoryTreeModel()if err != nil {log.Fatal(err)}tableModel := NewFileInfoModel()if err := (MainWindow{AssignTo: &mainWindow,Title:    "Walk File Browser Example",MinSize:  Size{600, 400},Size:     Size{1024, 640},Layout:   HBox{MarginsZero: true},Children: []Widget{HSplitter{AssignTo: &splitter,Children: []Widget{TreeView{AssignTo: &treeView,Model:    treeModel,OnCurrentItemChanged: func() {dir := treeView.CurrentItem().(*Directory)if err := tableModel.SetDirPath(dir.Path()); err != nil {walk.MsgBox(mainWindow,"Error",err.Error(),walk.MsgBoxOK|walk.MsgBoxIconError)}},},TableView{AssignTo:      &tableView,StretchFactor: 2,Columns: []TableViewColumn{TableViewColumn{DataMember: "Name",Width:      192,},TableViewColumn{DataMember: "Size",Format:     "%d",Alignment:  AlignFar,Width:      64,},TableViewColumn{DataMember: "Modified",Format:     "2006-01-02 15:04:05",Width:      120,},},Model: tableModel,OnCurrentIndexChanged: func() {var url stringif index := tableView.CurrentIndex(); index > -1 {name := tableModel.items[index].Namedir := treeView.CurrentItem().(*Directory)url = filepath.Join(dir.Path(), name)}webView.SetURL(url)},},WebView{AssignTo:      &webView,StretchFactor: 2,},},},},}.Create()); err != nil {log.Fatal(err)}splitter.SetFixed(treeView, true)splitter.SetFixed(tableView, true)mainWindow.Run()
}

Go GUI---lxn/walk 自带demo学习---7.文件浏览器相关推荐

Go GUI---lxn/walk 自带demo学习---16.notifyicon通知图标
简单说明:通知图标demo,原文都有注释,很好理解需要一个walk.MainWindow 或一个walk.Dialog用于他们的消息循环.但是本例中让MainWindow 不可见. 创建通知图标,并 ...
AutoJs学习-实现文件浏览器
往期文章分享点击跳转=><导航贴>- Unity手册,系统实战学习点击跳转=><导航贴>- Android手册,重温移动开发
Py：python利用easygui实现最简单GUI带你学习区块链技术的发展和由来
Py:python利用easygui实现最简单GUI带你学习区块链技术的发展和由来目录输出结果实现代码输出结果实现代码 # -*- coding: utf-8 -*- ''' Created ...
Go实战--使用golang开发Windows Gui桌面程序(lxn/walk)
生命不止,继续 go go go!!! golang官方并没有提供Windows gui库,但是今天还是要跟大家分享一下使用golang开发Windows桌面程序,当然又是面向github编程了. 知 ...
RPG游戏Demo学习笔记一
导航 RPG游戏Demo学习笔记一 UE笔记 -- 一个简单的AI_weixin_52918492的博客-CSDN博客目录一.准备资源二.基础功能生命值与能量值创建Widget Bluepr ...
微信语音idk的demo学习
微信语音idk的demo学习 1. if ([[[UIDevice currentDevice]systemVersion]floatValue]>=7) { NSLog(@"%f&q ...
通过demo学习OpenStack开发——单元测试
本文将进入单元测试的部分,这也是基础知识中最后一个大块.本文将重点讲述Python和OpenStack中的单元测试的生态环境. 通过demo学习OpenStack开发--单元测试\ 单元测试的重要性\ ...
android vlayout 阿里,带你学习阿里巴巴的开源库VLayout
原标题:带你学习阿里巴巴的开源库VLayout 今日科技快讯 14日,京东在总部召开"京东游戏泛娱乐产业联盟发布会",宣布完成对原LPL(英雄联盟职业联赛)队伍QG战队及LSPL( ...
如何用excle制作黑人拉馆_家居DIY带你学习如何用塑料勺制作壁挂！
「家居DIY」带你学习如何用塑料勺制作壁挂! DIY生活馆图片展示内容介绍传承手工艺术,放飞指尖梦想,每一节教学我们都会认真对待!只为传递手工技艺,动手实践能够让生活更美好,它让这一平淡的生活眼前一 ...

Go GUI---lxn/walk 自带demo学习---7.文件浏览器

Go GUI---lxn/walk 自带demo学习---7.文件浏览器相关推荐

最新文章

热门文章