无法在gotk3应用程序中创建菜单栏。

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英文:

Unable to create a menubar in a gotk3 application

问题

我正在使用gotk3(一个为Go语言提供GTK+3绑定的项目)编写一个简单的GUI应用程序。我想在应用程序中显示一个菜单栏,但是现在它没有显示任何菜单(在MacOSX和Linux上测试过)。这是代码:

package main

import (
	"github.com/gotk3/gotk3/gtk"
	"log"
)

func main() {
	gtk.Init(nil)

	// 创建窗口
	win, err := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
	if err != nil {
		log.Fatal("Unable to create window:", err)
	}
	win.SetDefaultSize(800, 600)
	win.Connect("destroy", func() {
		gtk.MainQuit()
	})

	// 创建网格和标签
	grid, err := gtk.GridNew()
	if err != nil {
		log.Fatal("Unable to create grid:", err)
	}
	label, _ := gtk.LabelNew("Hello, gotk3!")
	grid.Add(label)

	// 创建菜单
	menuBar, err := gtk.MenuBarNew()
	if err != nil {
		log.Fatal("Unable to create menubar:", err)
	}

	menu, err := gtk.MenuNew()
	if err != nil {
		log.Fatal("Unable to create menu:", err)
	}
	menu.SetName("File")

	menuItem, err := gtk.MenuItemNewWithLabel("Open")
	if err != nil {
		log.Fatal("Unable to create menuitem:", err)
	}
	menu.Append(menuItem)

	// 将菜单栏附加到网格
	grid.Attach(menuBar, 0, 0, 200, 200)

	// 显示窗口
	win.Add(grid)
	win.ShowAll()
	gtk.Main()
}

由于它不起作用,我认为Attach()不是正确的函数来实现这个功能。我从未使用过GTK+,所以对该怎么做或者在哪里查找几乎没有任何想法。有什么提示吗?

谢谢,
Andrea

英文:

I'm using gotk3 (a project that provides Go bindings for GTK+3) for writing a simple GUI application. I'd like to show a menu bar in the application but now it doesn't show any menu (tested on both MacOSX and Linux). This is the code:

package main

import (
	"github.com/gotk3/gotk3/gtk"
    "log"
)

func main() {

    gtk.Init(nil)

	// creates window
    win, err := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
	if err != nil {
    	log.Fatal("Unable to create window:", err)
    }
	win.SetDefaultSize(800, 600)
    win.Connect("destroy", func() {
	    gtk.MainQuit()
	})

    // creates grid and label
	grid, err := gtk.GridNew()
    if err != nil {
	    log.Fatal("Unable to create grid:", err)
	}
    label, _ := gtk.LabelNew("Hello, gotk3!")
	grid.Add(label)


	// creates menu
    menuBar, err := gtk.MenuBarNew()
	if err != nil {
    	log.Fatal("Unable to create menubar:", err)
	}

	menu, err := gtk.MenuNew()
    if err != nil {
	    log.Fatal("Unable to create menu:", err)
	}
    menu.SetName("File")

	menuItem, err := gtk.MenuItemNewWithLabel("Open")
    if err != nil {
	    log.Fatal("Unable to create menuitem:", err)
	}
    menu.Append(menuItem)

	// attaches menubar to grid
    grid.Attach(menuBar, 0, 0, 200, 200)

	// shows window
    win.Add(grid)
	win.ShowAll()
    gtk.Main()
}

Since it doesn't work I don't think that Attach() is the right function for doing this. I never worked with GTK+, so almost no idea of what to do or where to look. Any hint?

Thanks,
Andrea

答案1

得分: 0

好的,以下是翻译好的内容:

好的,我找到了如何做到这一点。根据这个示例,我理解了在GTK上创建菜单所需的步骤。编辑的部分如下:

// 创建菜单栏
menuBar, err := gtk.MenuBarNew()
if err != nil {
    log.Fatal("无法创建菜单栏:", err)
}

// 创建菜单
fileMenu, err := gtk.MenuNew()
if err != nil {
    log.Fatal("无法创建菜单:", err)
}

// 创建菜单项
fileMenuItem, err := gtk.MenuItemNewWithLabel("文件")
if err != nil {
    log.Fatal("无法创建菜单项:", err)
}

openMenuItem, err := gtk.MenuItemNewWithLabel("打开")
if err != nil {
    log.Fatal("无法创建菜单项:", err)
}

fileMenuItem.SetSubmenu(fileMenu)
fileMenu.Append(openMenuItem)
menuBar.Append(fileMenuItem)

gtkGrid.Attach(menuBar, 0, 0, 200, 200)
win.Add(gtkGrid)

现在菜单显示在标签上方(在MacOSX上),但至少它被显示出来了。

英文:

OK, I found out how to do it. Following this example I understood the steps needed to create a menu on GTK. The edited part is:

	// creates menu
	menuBar, err := gtk.MenuBarNew()
	if err != nil {
		log.Fatal("Unable to create menubar:", err)
	}

	fileMenu, err := gtk.MenuNew()
	if err != nil {
		log.Fatal("Unable to create menu:", err)
	}

	fileMenuItem, err := gtk.MenuItemNewWithLabel("File")
	if err != nil {
		log.Fatal("Unable to create menuitem:", err)
	}

	openMenuItem, err := gtk.MenuItemNewWithLabel("Open")
	if err != nil {
		log.Fatal("Unable to create menuitem:", err)
	}

	fileMenuItem.SetSubmenu(fileMenu)
	fileMenu.Append(openMenuItem)
	menuBar.Append(fileMenuItem)

	gtkGrid.Attach(menuBar, 0, 0, 200, 200)
	win.Add(gtkGrid)

Now the menu is displayed over the label (on MacOsX), but at least it's displayed.

huangapple
  • 本文由 发表于 2017年9月4日 15:42:09
  • 转载请务必保留本文链接:https://go.coder-hub.com/46032434.html
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