Walk: A Windows GUI toolkit for The Go Programming Language

About Walk

Walk is a "Windows Application Library Kit" for the Go Programming Language.

Its primarily useful for Desktop GUI development, but there is some more stuff.

Setup

Make sure you have a working Go installation. See Getting Started

Note

Walk currently requires Go 1.11.x or later.

To Install

Now run go get github.com/lxn/walk

Using Walk

The preferred way to create GUIs with Walk is to use its declarative sub package, as illustrated in this small example:

test.go

package main

import (
	"github.com/lxn/walk"
	. "github.com/lxn/walk/declarative"
	"strings"
)

func main() {
	var inTE, outTE *walk.TextEdit

	MainWindow{
		Title:   "SCREAMO",
		MinSize: Size{600, 400},
		Layout:  VBox{},
		Children: []Widget{
			HSplitter{
				Children: []Widget{
					TextEdit{AssignTo: &inTE},
					TextEdit{AssignTo: &outTE, ReadOnly: true},
				},
			},
			PushButton{
				Text: "SCREAM",
				OnClicked: func() {
					outTE.SetText(strings.ToUpper(inTE.Text()))
				},
			},
		},
	}.Run()
}

Create Manifest test.manifest

<?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>

Then either compile the manifest using the rsrc tool, like this:

go get github.com/akavel/rsrc
rsrc -manifest test.manifest -o rsrc.syso

or rename the test.manifest file to test.exe.manifest and distribute it with the application instead.

Build app

In the directory containing test.go run

go build

To get rid of the cmd window, instead run

go build -ldflags="-H windowsgui"

Run app

test.exe

Sample Output (Windows 7)

More Examples

There are some examples that should get you started.

Application Manifest Files

Walk requires Common Controls 6. This means that you must put an appropriate application manifest file either next to your executable or embedded as a resource.

You can copy one of the application manifest files that come with the examples.

To embed a manifest file as a resource, you can use the rsrc tool.

IMPORTANT: If you don't embed a manifest as a resource, then you should not launch your executable before the manifest file is in place. If you do anyway, the program will not run properly. And worse, Windows will not recognize a manifest file, you later drop next to the executable. To fix this, rebuild your executable and only launch it with a manifest file in place.

CGo Optimizations

The usual default message loop includes calls to win32 API functions, which incurs a decent amount of runtime overhead coming from Go. As an alternative to this, you may compile Walk using an optional C implementation of the main message loop, by passing the walk_use_cgo build tag:

go build -tags walk_use_cgo

Author: lxn
Source Code: https://github.com/lxn/walk 
License: View license

#go #golang #windows #gui 

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Walk: A Windows GUI toolkit for The Go Programming Language

About Walk

Walk is a "Windows Application Library Kit" for the Go Programming Language.

Its primarily useful for Desktop GUI development, but there is some more stuff.

Setup

Make sure you have a working Go installation. See Getting Started

Note

Walk currently requires Go 1.11.x or later.

To Install

Now run go get github.com/lxn/walk

Using Walk

The preferred way to create GUIs with Walk is to use its declarative sub package, as illustrated in this small example:

test.go

package main

import (
	"github.com/lxn/walk"
	. "github.com/lxn/walk/declarative"
	"strings"
)

func main() {
	var inTE, outTE *walk.TextEdit

	MainWindow{
		Title:   "SCREAMO",
		MinSize: Size{600, 400},
		Layout:  VBox{},
		Children: []Widget{
			HSplitter{
				Children: []Widget{
					TextEdit{AssignTo: &inTE},
					TextEdit{AssignTo: &outTE, ReadOnly: true},
				},
			},
			PushButton{
				Text: "SCREAM",
				OnClicked: func() {
					outTE.SetText(strings.ToUpper(inTE.Text()))
				},
			},
		},
	}.Run()
}

Create Manifest test.manifest

<?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>

Then either compile the manifest using the rsrc tool, like this:

go get github.com/akavel/rsrc
rsrc -manifest test.manifest -o rsrc.syso

or rename the test.manifest file to test.exe.manifest and distribute it with the application instead.

Build app

In the directory containing test.go run

go build

To get rid of the cmd window, instead run

go build -ldflags="-H windowsgui"

Run app

test.exe

Sample Output (Windows 7)

More Examples

There are some examples that should get you started.

Application Manifest Files

Walk requires Common Controls 6. This means that you must put an appropriate application manifest file either next to your executable or embedded as a resource.

You can copy one of the application manifest files that come with the examples.

To embed a manifest file as a resource, you can use the rsrc tool.

IMPORTANT: If you don't embed a manifest as a resource, then you should not launch your executable before the manifest file is in place. If you do anyway, the program will not run properly. And worse, Windows will not recognize a manifest file, you later drop next to the executable. To fix this, rebuild your executable and only launch it with a manifest file in place.

CGo Optimizations

The usual default message loop includes calls to win32 API functions, which incurs a decent amount of runtime overhead coming from Go. As an alternative to this, you may compile Walk using an optional C implementation of the main message loop, by passing the walk_use_cgo build tag:

go build -tags walk_use_cgo

Author: lxn
Source Code: https://github.com/lxn/walk 
License: View license

#go #golang #windows #gui 

Complete Guide to Develop an Interface Using Tkinter Python GUI Toolkit

A Graphical User Interface allows the user to interact with the application created on different platforms.

GUI interfaces use different indicators like audio indicators, graphical icons, different widgets which makes it highly interactive and user friendly rather than Command-Line applications which are not visually appealing and are text-based interactions.

Tkinter provides a GUI look to the standard python interface. It comes pre-installed with the standard versions of Python on Windows, Linux, and macOS. Tkinter is a Python binding to the Tk GUI toolkit which is why it is named Tkinter. It is the most commonly used python GUI toolkit due to a large variety of widgets it supports and its ease of use.

Tkinter provides powerful GUI based widgets and functions which create a visually appealing and highly creative application in just a few lines of codes. Tkinter is famous for creating a GUI application because it opens up in a new window where the user can interact with the application.

In this article, we will explore how we can create a GUI application with a variety of widgets that are available in Tkinter.

Implementation of Tkinter Python GUI Toolkit

As Tkinter comes pre-installed with standard python installation so we will not be installing it although if you don’t have it installed you can install it using pip install tkinter.

1. Importing required libraries

We will create a form using Tkinter and the widgets it provides. So we will import Tkinter. Also, we will create a window that will initiate the Tk class.

import tkinter as tk

window = tk.Tk()

1. Creating a form step by step

Now we will create the form using different widgets and wrapping them in a single loop.

1. Setting the Title

We will start by setting the turtle of the window that will run our form. As I already mentioned that we need everything in a single loop so that everything displays at one go we will create the main loop and define all our widgets and functions before that.

window.title('Article Submission Form')

window.mainloop() #this will be the end of our form to wrap everything

PIN IT

This is the basic layout of the window we created with the title as we mentioned in the code.

1. Adding Label and Textbox

We will start by adding Labels for different sections and adding a text box to those labels to the user input. We will also make the application window a bit large in size so that we can see everything clearly without maximizing. Here we will use the ‘place’ function which takes the X and Y coordinate values and displays the widgets accordingly.

---

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What's new in the go 1.15

Go announced Go 1.15 version on 11 Aug 2020. Highlighted updates and features include Substantial improvements to the Go linker, Improved allocation for small objects at high core counts, X.509 CommonName deprecation, GOPROXY supports skipping proxies that return errors, New embedded tzdata package, Several Core Library improvements and more.

As Go promise for maintaining backward compatibility. After upgrading to the latest Go 1.15 version, almost all existing Golang applications or programs continue to compile and run as older Golang version.

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Guide to Python Programming Language

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