go开发 windows GUI界面

一、环境配置

1、使用go modules新建 一个工程。
2、开始写一个简单的GUI测试程序，新建main.go写入代码。
3、执行 >> go build -ldflags="-H windowsgui"
下载依赖，并生成可执行文件。（此处生成的文件还无法执行）
4、在工程下新建一个 test.minifest文件，内容如下：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
    <assemblyIdentity version="1.0.0.0" processorArchitecture="*" name="SomeFunkyNameHere" type="win32"/>
    <dependency>
        <dependentAssembly>
            <assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="6.0.0.0" processorArchitecture="*" publicKeyToken="6595b64144ccf1df" language="*"/>
        </dependentAssembly>
    </dependency>
    <application xmlns="urn:schemas-microsoft-com:asm.v3">
        <windowsSettings>
            <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2, PerMonitor</dpiAwareness>
            <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">True</dpiAware>
        </windowsSettings>
    </application>
</assembly>

5、还需要一个golang包： go get github.com/akavel/rsrc
到该包下执行go build. 生成 rsrc.exe文件。
该包用于在程序中嵌入二进制资源的工具
将文件复制到GOROOT/bin 下面 。
再回到代码目录执行>> rsrc -manifest test.manifest -o rsrc.syso
6、通过上述配置后再执行： >> go build -ldflags="-H windowsgui"
生成main.exe可执文件，运行结果如下：

package main
import (
    "fmt"
    "log"
    "os"
    "strings"
)
import (
    "github.com/lxn/walk"
    . "github.com/lxn/walk/declarative"
)
func main() {
    mw := &MyMainWindow{model: NewEnvModel()}

    if _, err := (MainWindow{
        AssignTo: &mw.MainWindow,
        Title:    "Walk ListBox Example",
        MinSize:  Size{240, 320},
        Size:     Size{300, 400},
        Layout:   VBox{MarginsZero: true},
        Children: []Widget{
            HSplitter{
                Children: []Widget{
                    ListBox{
                        AssignTo: &mw.lb,
                        Model:    mw.model,
                        OnCurrentIndexChanged: mw.lb_CurrentIndexChanged,
                        OnItemActivated:       mw.lb_ItemActivated,
                    },
                    TextEdit{
                        AssignTo: &mw.te,
                        ReadOnly: true,
                    },
                },
            },
        },
    }.Run()); err != nil {
        log.Fatal(err)
    }
}

type MyMainWindow struct {
    *walk.MainWindow
    model *EnvModel
    lb    *walk.ListBox
    te    *walk.TextEdit
}

func (mw *MyMainWindow) lb_CurrentIndexChanged() {
    i := mw.lb.CurrentIndex()
    item := &mw.model.items[i]

    mw.te.SetText(item.value)

    fmt.Println("CurrentIndex: ", i)
    fmt.Println("CurrentEnvVarName: ", item.name)
}

func (mw *MyMainWindow) lb_ItemActivated() {
    value := mw.model.items[mw.lb.CurrentIndex()].value

    walk.MsgBox(mw, "Value", value, walk.MsgBoxIconInformation)
}

type EnvItem struct {
    name  string
    value string
}

type EnvModel struct {
    walk.ListModelBase
    items []EnvItem
}

func NewEnvModel() *EnvModel {
    env := os.Environ()

    m := &EnvModel{items: make([]EnvItem, len(env))}

    for i, e := range env {
        j := strings.Index(e, "=")
        if j == 0 {
            continue
        }

        name := e[0:j]
        value := strings.Replace(e[j+1:], ";", "\r\n", -1)

        m.items[i] = EnvItem{name, value}
    }

    return m
}

func (m *EnvModel) ItemCount() int {
    return len(m.items)
}

func (m *EnvModel) Value(index int) interface{} {
    return m.items[index].name
}