Implementing wxWidgets in Golang (wxGo)

What is wxWidgets?
wxWidgets is a C++ library that lets developers create applications for Windows, Mac OS X, Linux and other platforms with a single code base. wxWidgets gives applications a truly native look and feel because it uses the platform's native API rather than emulating the GUI. It's also extensive, free, open-source and mature.


Installation Guide for Windows
- go version go1.8 windows/amd64
- mingw-w64 or tdm-gcc 5
- add your GO path and TDM-GCC path into your environment variable
- From command prompt execute:
      go get -x github.com/dontpanic92/wxGo/wx
  this step will need extra time to finish


Implementation

1. Hello World 

package main

import "github.com/dontpanic92/wxGo/wx"

func main() {
    wx.NewApp()
    f := wx.NewDialog(wx.NullWindow, -1, "Hello World")
    f.ShowModal()
    f.Destroy()
}

Result:

2. AUI Example

import "github.com/dontpanic92/wxGo/wx"

type MyFrame struct {
    wx.Frame
    auiManager wx.AuiManager
    menuBar wx.MenuBar
}

const (
    ID_Settings = iota + wx.ID_HIGHEST + 1
    ID_SampleItem
)

func NewMyFrame() *MyFrame {
    self := &MyFrame{}
    self.Frame = wx.NewFrame(wx.NullWindow, wx.ID_ANY, "AUI Example")

    // AUI Init

    self.auiManager = wx.NewAuiManager()
    self.auiManager.SetManagedWindow(self)

    // We should call auiManager.UnInit() in frame's desructor, but unfortunately
    // we can't get a callback when frame's destructor called. So we do this in the
    // EVT_CLOSE_WINDOW. And also because we listen the CloseEvent, we have to call
    // Destroy() manually.
    wx.Bind(self, wx.EVT_CLOSE_WINDOW, func(e wx.Event){
        self.auiManager.UnInit()
        self.Destroy()
    }, self.GetId())

    // Menu

    self.menuBar = wx.NewMenuBar()
    fileMenu := wx.NewMenu()
    fileMenu.Append(wx.ID_EXIT)

    wx.Bind(self, wx.EVT_MENU, func(e wx.Event){
        self.Close(true)
    }, wx.ID_EXIT)

    self.menuBar.Append(fileMenu, "&File")
    self.SetMenuBar(self.menuBar)

    // StatusBar

    self.CreateStatusBar()
    self.GetStatusBar().SetStatusText("Ready")

    // AuiToolBar

    toolBar1 := wx.NewAuiToolBar(self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.AUI_TB_DEFAULT_STYLE | wx.AUI_TB_OVERFLOW)
    toolBar1.SetToolBitmapSize(wx.NewSizeT(48,48))

    toolBar1.AddTool(ID_SampleItem + 1, "Test", wx.ArtProviderGetBitmap(wx.ART_ERROR))
    toolBar1.AddSeparator()
    toolBar1.AddTool(ID_SampleItem + 2, "Test", wx.ArtProviderGetBitmap(wx.ART_QUESTION))
    toolBar1.AddTool(ID_SampleItem + 3, "Test", wx.ArtProviderGetBitmap(wx.ART_INFORMATION))
    toolBar1.AddTool(ID_SampleItem + 4, "Test", wx.ArtProviderGetBitmap(wx.ART_WARNING))
    toolBar1.AddTool(ID_SampleItem + 5, "Test", wx.ArtProviderGetBitmap(wx.ART_MISSING_IMAGE))
   
    separator := wx.NewAuiToolBarItemT()
    separator.SetKind(wx.ITEM_SEPARATOR)
    customButton := wx.NewAuiToolBarItemT()
    customButton.SetKind(wx.ITEM_NORMAL)
    customButton.SetLabel("Customize...")
    wx.Bind(self, wx.EVT_MENU, func(e wx.Event) {
        wx.MessageBox("Customize clicked!")
    }, customButton.GetId())
   
   
    toolBar1.SetCustomOverflowItems([]wx.AuiToolBarItem{}, []wx.AuiToolBarItem{separator, customButton})
    toolBar1.Realize()


    paneInfo := wx.NewAuiPaneInfoT().Name("tb1").Caption("Big Toolbar").ToolbarPane().Top()
    self.auiManager.AddPane(toolBar1, paneInfo)
   
    // Left pane - a tree control
   
    treeCtrl := wx.NewTreeCtrl(self, wx.ID_ANY, wx.DefaultPosition, wx.NewSizeT(160, 250), wx.TR_DEFAULT_STYLE | wx.NO_BORDER);

    treeRoot := treeCtrl.AddRoot("wxAUI Project", 0)
   
    firstItem := treeCtrl.AppendItem(treeRoot, "Item 1", 0)
    treeCtrl.AppendItem(treeRoot, "Item 2", 0)
    treeCtrl.AppendItem(treeRoot, "Item 3", 0)
    treeCtrl.AppendItem(treeRoot, "Item 4", 0)
    treeCtrl.AppendItem(treeRoot, "Item 5", 0)
    treeCtrl.AppendItem(firstItem, "Subitem 1", 1)
    treeCtrl.AppendItem(firstItem, "Subitem 2", 1)
    treeCtrl.AppendItem(firstItem, "Subitem 3", 1)
    treeCtrl.AppendItem(firstItem, "Subitem 4", 1)
    treeCtrl.AppendItem(firstItem, "Subitem 5", 1)
    treeCtrl.Expand(treeRoot)
   
    self.auiManager.AddPane(wx.ToWindow(treeCtrl), wx.LEFT, "Hello")
    // wxTreeCtrl has an overloaded `GetNextSibling` function, which as a different
    // signature with wxWindow. So we have to cast wxTreeCtrl to wxWindow manually.
    // Equivalent: treeCtrl.SwigGetWindow()
   
   
    // CenterPane - a text control

    paneInfo = wx.NewAuiPaneInfoT().Name("notebook").CenterPane().PaneBorder(false)
    notebook := wx.NewAuiNotebook(self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.AUI_NB_DEFAULT_STYLE | wx.AUI_NB_CLOSE_BUTTON)
    notebook.AddPage(wx.NewTextCtrl(notebook, wx.ID_ANY, "", wx.DefaultPosition, wx.DefaultSize, wx.TE_MULTILINE), "Test", true)
    self.auiManager.AddPane(notebook, paneInfo)

    self.auiManager.Update()

    return self
}

func main() {
    wx1 := wx.NewApp()
    frame := NewMyFrame()
    frame.Show()
    wx1.MainLoop()
    return
}

Result:

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