Simple windowed application: Difference between revisions

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Revision as of 09:56, 3 October 2016

Task

Create a window that has:

a label that says "There have been no clicks yet"
a button that says "click me"

Upon clicking the button with the mouse, the label should change and show the number of times the button has been clicked.

Ada

Library: GTK version GtkAda

Library: GtkAda

The following solution is based on bindings to GTK+. Ada as a language does not provide standard GUI. Apart from GtkAda, there exist numerous other GUI bindings and libraries: CLAW, AdaGLUT, GWindow, JEWL, win32ada, QtAda etc. <lang ada>with Gdk.Event; use Gdk.Event; with Gtk.Button; use Gtk.Button; with Gtk.Label; use Gtk.Label; with Gtk.Window; use Gtk.Window; with Gtk.Widget; use Gtk.Widget; with Gtk.Table; use Gtk.Table;

with Gtk.Handlers; with Gtk.Main;

procedure Simple_Windowed_Application is

  Window : Gtk_Window;
  Grid   : Gtk_Table;
  Button : Gtk_Button;
  Label  : Gtk_Label;
  Count  : Natural := 0;

  package Handlers is new Gtk.Handlers.Callback (Gtk_Widget_Record);
  package Return_Handlers is
     new Gtk.Handlers.Return_Callback (Gtk_Widget_Record, Boolean);

  function Delete_Event (Widget : access Gtk_Widget_Record'Class)
     return Boolean is
  begin
     return False;
  end Delete_Event;

  procedure Destroy (Widget : access Gtk_Widget_Record'Class) is
  begin
    Gtk.Main.Main_Quit;
  end Destroy;

  procedure Clicked (Widget : access Gtk_Widget_Record'Class) is
  begin
    Count := Count + 1;
    Set_Text (Label, "The button clicks:" & Natural'Image (Count));
  end Clicked;

begin

  Gtk.Main.Init;
  Gtk.Window.Gtk_New (Window);
  Gtk_New (Grid, 1, 2, False);
  Add (Window, Grid);
  Gtk_New (Label, "There have been no clicks yet");
  Attach (Grid, Label, 0, 1, 0, 1);
  Gtk_New (Button, "Click me");
  Attach (Grid, Button, 0, 1, 1, 2);
  Return_Handlers.Connect
  (  Window,
     "delete_event",
     Return_Handlers.To_Marshaller (Delete_Event'Access)
  );
  Handlers.Connect
  (  Window,
     "destroy",
     Handlers.To_Marshaller (Destroy'Access)
  );
  Handlers.Connect
  (  Button,
     "clicked",
     Handlers.To_Marshaller (Clicked'Access)
  );
  Show_All (Grid);
  Show (Window);

  Gtk.Main.Main;

end Simple_Windowed_Application;</lang>

AutoHotkey

<lang Autohotkey>; Create simple windowed application

  Gui, Add, Text, vTextCtl, There have been no clicks yet ; add a Text-Control
  Gui, Add, Button, gButtonClick xm, click me ; add a Button-Control
  Gui, Show, , Simple windowed application ; show the Window

Return ; end of the auto-execute section

ButtonClick: ; the subroutine executed each time the Button-Control is clicked

  count++ ; increment the click-counting var
  GuiControl, , TextCtl, %count% ; update the Text-Control with the click-counting var

Return ; end of the subroutine

GuiClose: ; the subroutine executed when the Window is closed

  ExitApp ; exit this process

Return</lang>

B4J

Region Project Attributes

#MainFormWidth: 593 #MainFormHeight: 179

End Region

Sub Process_Globals Private fx As JFX Private MainForm As Form Private btnClickMe As Button Private lblClickCounter As Label Private nClicks As Int = 0 Private aPlurals() As Object = Array As Object(Array As String("has","click"),Array As String("have","clicks")) End Sub

Sub AppStart (Form1 As Form, Args() As String) MainForm = Form1 MainForm.RootPane.LoadLayout("Layout1") 'Load the layout file. MainForm.Show End Sub

Sub btnClickMe_Action nClicks = nClicks + 1 Dim aPlural() As Object = aPlurals(IIF(nClicks=1,0,1)) lblClickCounter.Text = "There " & aPlural(0) & " been " & (nClicks) & " " & aPlural(1) & " so far." End Sub

Sub IIF(test As Boolean, trueVal As Object, falseVal As Object) As Object If test Then Return trueVal Else Return falseVal End If End Sub</lang>

Layout1.fxml (as B4J uses JavaFX's Scene Builder) <lang cfm> <?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.text.*?> <?import java.lang.*?> <?import java.util.*?> <?import javafx.collections.*?> <?import javafx.scene.control.*?> <?import javafx.scene.image.*?> <?import javafx.scene.layout.*?> <?import javafx.scene.paint.*?> <?import javafx.scene.web.*?>

  <children>
     <Button id="btnClickMe" layoutX="254.0" layoutY="90.0" mnemonicParsing="false" text="Click Me">
        
           
        
     </Button>
     <Label id="lblClickCounter" layoutX="162.0" layoutY="31.0" text="There have been no clicks as yet.">
        
           
        
     </Label>
  </children>

</AnchorPane> </lang>

BBC BASIC

Works with: BBC BASIC for Windows

<lang bbcbasic> INSTALL @lib$+"WINLIB2"

     INSTALL @lib$+"WINLIB5"
     
     window% = FN_newdialog("Rosetta Code", 100, 100, 120, 52, 8, 1000)
     PROC_static(window%, "There have been no clicks yet", 100, 10, 10, 100, 14, 0)
     PROC_pushbutton(window%, "Click me", FN_setproc(PROCclick), 40, 30, 40, 16, 0)
     PROC_showdialog(window%)
     
     REPEAT
       WAIT 1
     UNTIL !window% = 0
     QUIT
     
     DEF PROCclick
     PRIVATE clicks%
     clicks% += 1
     SYS "SetDlgItemText", !window%, 100, "Number of clicks = " + STR$(clicks%)
     ENDPROC</lang>

C

Library: GTK

<lang c>#include <stdio.h>

include <gtk/gtk.h>

const gchar *clickme = "Click Me"; guint counter = 0;

define MAXLEN 64

void clickedme(GtkButton *o, gpointer d) {

   GtkLabel *l = GTK_LABEL(d);
   char nt[MAXLEN];
   
   counter++;
   snprintf(nt, MAXLEN, "You clicked me %d times", counter);
   gtk_label_set_text(l, nt);

}

int main(int argc, char **argv) {

   GtkWindow *win;
   GtkButton *button;
   GtkLabel *label;
   GtkVBox *vbox;

   gtk_init(&argc, &argv);
   win = (GtkWindow*)gtk_window_new(GTK_WINDOW_TOPLEVEL);
   gtk_window_set_title(win, clickme);
   button = (GtkButton*)gtk_button_new_with_label(clickme);
   label = (GtkLabel*)gtk_label_new("There have been no clicks yet");
   gtk_label_set_single_line_mode(label, TRUE);
   vbox = (GtkVBox*)gtk_vbox_new(TRUE, 1);
   gtk_container_add(GTK_CONTAINER(vbox), GTK_WIDGET(label));
   gtk_container_add(GTK_CONTAINER(vbox), GTK_WIDGET(button));
   gtk_container_add(GTK_CONTAINER(win), GTK_WIDGET(vbox));
   g_signal_connect(G_OBJECT(win), "delete-event", (GCallback)gtk_main_quit, NULL);
   g_signal_connect(G_OBJECT(button), "clicked", (GCallback)clickedme, label);
   gtk_widget_show_all(GTK_WIDGET(win));
   gtk_main();
   return 0;

}</lang>

C++

Uses: Qt (Components:{{#foreach: component$n$|{{{component$n$}}}Property "Uses Library" (as page type) with input value "Library/Qt/{{{component$n$}}}" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process., }})

Library: Qt

4.4 with source files as shown , built from a Makefile generated by the Qt tool qmake

clickcounter.h

<lang cpp>#ifndef CLICKCOUNTER_H

define CLICKCOUNTER_H

include <QWidget>

class QLabel ; class QPushButton ; class QVBoxLayout ;

class Counter : public QWidget {

   Q_OBJECT

public :

  Counter( QWidget * parent = 0 ) ;

private :

  int number ;
  QLabel *countLabel ;
  QPushButton *clicker ;
  QVBoxLayout *myLayout ;

private slots :

  void countClicks( ) ;

} ;

endif</lang>

clickcounter.cpp

<lang cpp>#include <QPushButton>

include <QLabel>
include <QVBoxLayout>
include "clickcounter.h"

Counter::Counter( QWidget * parent ) : QWidget( parent ) {

  number = 0 ;
  countLabel = new QLabel( "There have been no clicks yet!" ) ;
  clicker = new QPushButton( "click me" ) ;
  connect ( clicker , SIGNAL( clicked( ) ) , this , SLOT( countClicks( ) ) ) ;
  myLayout = new QVBoxLayout ;
  myLayout->addWidget( countLabel ) ;
  myLayout->addWidget( clicker ) ;
  setLayout( myLayout ) ;

}

void Counter::countClicks( ) {

  number++ ;
  countLabel->setText( QString( "The button has been clicked %1 times!").arg( number ) ) ;

}</lang>

main.cpp

<lang Cpp>#include <QApplication>

include "clickcounter.h"

int main( int argc , char *argv[ ] ) {

  QApplication app( argc , argv ) ;
  Counter counter ;
  counter.show( ) ;
  return app.exec( ) ;

}</lang>

C#

<lang csharp>using System.Windows.Forms;

class RosettaForm : Form {

   RosettaForm()
   {
       var clickCount = 0;

       var label = new Label();
       label.Text = "There have been no clicks yet.";
       label.Dock = DockStyle.Top;
       Controls.Add(label);

       var button = new Button();
       button.Text = "Click Me";
       button.Dock = DockStyle.Bottom;
       button.Click += delegate
                       {
                           clickCount++;
                           label.Text = "Number of clicks: " + clickCount + ".";
                       };
       Controls.Add(button);
   }

   static void Main()
   {
       Application.Run(new RosettaForm());
   }

} </lang>

Clojure

<lang clojure>(ns counter-window

 (:import (javax.swing JFrame JLabel JButton)))

(defmacro on-action [component event & body]

 `(. ~component addActionListener
     (proxy [java.awt.event.ActionListener] []
       (actionPerformed [~event] ~@body))))

(defn counter-app []

 (let [counter (atom 0)
       label (JLabel. "There have been no clicks yet")
       button (doto (JButton. "Click me!")
                (on-action evnt  
                  (.setText label
                     (str "Counter: " (swap! counter inc)))))
       panel (doto (JPanel.)
               (.setOpaque true)
               (.add label)
               (.add button))]
   (doto (JFrame. "Counter App")
     (.setContentPane panel)
     (.setSize 300 100)
     (.setDefaultCloseOperation JFrame/EXIT_ON_CLOSE)
     (.setVisible true))))

</lang>

Common Lisp

Library: CLIM

Works with: McCLIM

<lang lisp>(defpackage #:rcswa

 (:use #:clim #:clim-lisp))

(in-package #:rcswa)</lang>

This version uses CLIM's command system:

<lang lisp>(define-application-frame simple-windowed-application ()

 ((clicks :initform 0
          :accessor clicks-of))
 (:menu-bar t)
 (:pane
  (make-pane 'application-pane
             :width '(40 :character)
             :height '(3 :character)
             :display-time :command-loop
             :display-function
               (lambda (pane stream)
                 (declare (ignore pane))
                 (format stream "~[There have been no clicks yet.~
                                   ~:;~:*There ~[have~;has~:;have~]~:* been ~R click~:P.~]"
                         (clicks-of *application-frame*))))))

(define-simple-windowed-application-command (com-click-me :menu t)

 ()
 (incf (clicks-of *application-frame*)))</lang>

This version uses an explicit pushbutton gadget, and may be used if more direct control over the UI layout and behavior is needed:

<lang lisp>(define-application-frame simple-windowed-application ()

 ((clicks :initform 0
          :accessor clicks-of))
 (:panes
  (the-label :application
             :width '(40 :character)
             :height '(3 :character)
             :display-time t
             :display-function
               (lambda (pane stream)
                 (declare (ignore pane))
                 (format stream "~[There have been no clicks yet.~
                                   ~:;~:*There ~[have~;has~:;have~]~:* been ~R click~:P.~]"
                         (clicks-of *application-frame*))))
  (the-button :push-button
              :label "Click Me"
              :activate-callback
                (lambda (button)
                  (declare (ignore button))
                  (incf (clicks-of *application-frame*))
                  (redisplay-frame-pane *application-frame*
                                        (find-pane-named *application-frame* 'the-label)
                                        :force-p t))))
 (:layouts (default
            (vertically (:equalize-width nil :align-x :center)
              the-label
              (spacing (:thickness 10) the-button)))))</lang>

In either case, the window is opened with:

<lang lisp>(run-frame-top-level (make-application-frame 'simple-windowed-application))</lang>

D

DFL

Works with: D version 1

Library: DFL

<lang d>module winapp ; import dfl.all ; import std.string ;

class MainForm: Form {

 Label label ;
 Button button ;
 this() {
   width = 240 ;
   with(label = new Label) {
     text = "There have been no clicks yet" ;
     dock = DockStyle.TOP ;
     parent = this ;     
   }
   with(button = new Button) {
     dock = DockStyle.BOTTOM ;
     text = "Click Me" ;
     parent = this ;
     click ~= &onClickButton ;
   }
   height = label.height + button.height + 36 ;
 }
 private void onClickButton(Object sender, EventArgs ea) {
   static int count = 0 ;
   label.text = "You had been clicked me " ~ std.string.toString(++count) ~ " times." ;
 }

}

void main() {

   Application.run(new MainForm);

}</lang>

Hybrid

Works with: D version 1

Library: Hybrid

Hybrid uses config files to describe GUI layout. SimpleWindow.cfg:

import "themes/default.cfg"

new FramedTopLevelWindow main {
	frame.text = "Simple Window";

	new Label label {
		text = "There have been no clicks yet";
	}

	new Button button {
		text = "Click me";
		size = 201 20;
	}
}

SimpleWindow.d: <lang d>module SimpleWindow; import tango.text.convert.Integer; import tango.core.Thread; // For Thread.yield

import xf.hybrid.Hybrid; //For widgets and general API import xf.hybrid.backend.GL; // For OpenGL Renderer

void main() { //load config file scope cfg = loadHybridConfig(`./SimpleWindow.cfg`); scope renderer = new Renderer; auto counter = 0;

bool programRunning = true; while (programRunning) { // Tell Hybrid what config to use gui.begin(cfg); // Exit program if user clicks the Close button if (gui().getProperty!(bool)("main.frame.closeClicked")) { programRunning = false; } // Update text on the label if (counter != 0) Label("main.label").text = toString(counter); // Increment counter if the button has been clicked if (Button("main.button").clicked) { counter++; } // Finalize. Prepare to render gui.end(); // Render window using OpenGL Renderer gui.render(renderer);

Thread.yield(); } }</lang>

Delphi

Works with: Delphi version 5.0

Creating a "basic windowed application" in Delphi is quite simple. Start up the IDE and the default application is a single windowed app. This will have two files, the main project file "project1" and a unit file, "unit1". What I a going to do here is going to be somewhat different. I will do it all dynamically from the main "program file". Create this in any text editor and you can then either open it in the IDE to build it, or invoke the command line compiler. There is quite a bit going on behind the scenes with the VCL and the RTL.

Filename = SingleWinApp.dpr

NOTE: The project name here must match the name of the file.

<lang delphi>-- begin file --

  Program SingleWinApp ;

  // This is the equivalent of the C #include
  Uses Forms, Windows, Messages, Classes, Graphics, Controls, StdCtrls ;

  type
    
    // The only reason for this declaration is to allow the connection of the
    // on click method to the forms button object. This class declaration adds
    // a procedure.

    TMainForm class(tform) 
      Procedure AddClicks(sender : tObject);
    end;

  // Use these globals.  
  var
 
    MainForm : tForm ;
    aLabel   : tLabel ;
    aButton  : tButton ;
    i        : integer = 0 ;

   // This is the Method call that we connect to the button object
   // to start counting the clicks.
   Procedure tMainForm.AddClicks(sender :tObject)
   begin
     inc(i);
     aLabel.Caption := IntToStr(i) + ' Clicks since startup' ;
   end;

   Begin
     // Do all the behind the scenes stuff that sets up the Windows environment 
     Application.Initialize ;

     // Create the form
     
     // Forms can either be created with an owner, like I have done here, or with
     // the owner set to Nil. In pascal (all versions of Borland) NIL is a
     // reserved, (the equivalent of NULL in Ansi C) word and un-sets any pointer 
     // variable. Setting the owner to the application object will ensure that the form is
     // freed by the application object when the application shuts down. If I had set
     // the owner to NIL then i would have had to make sure I freed the form explicitly
     // or it would have been orphaned, thus creating a memory leak.

     // I must direct your attention to the CreateNew constructor.  This is 
     // a non standard usage.  Normally the constructor Create() will call this
     // as part of the initialization routine for the form. Normally as you drop
     // various components on a form in deign mode, a DFM file is created with 
     // all the various initial states of the controls. This bypasses the 
     // DFM file altogether although all components AND the form are created
     // with default values. (see the Delphi help file).

     MainForm          := tMainForm.CreateNew(Application);
     MainForm.Parent   := Application ;
     MainForm.Position := poScreenCenter ;
     MainForm.Caption  := 'Single Window Application' ;

     // Create the Label, set its owner as MaiaForm
     aLabel          := tLabel.Create(mainForm);
     aLabel.Parent   := MainForm;
     aLabel.Caption  := IntToStr(i) + ' Clicks since startup' ;
     aLabel.Left     := 20 ;
     aLabel.Top      := MainForm.ClientRect.Bottom div 2 ;

     // Create the button, set its owner to MainForm
     aButton         := tButton.Create(MainForm);
     aButton.Parent  := MainForm ;
     aButton.Caption := 'Click Me!';
     aButton.Left    := (MainForm.ClientRect.Right div 2)-(aButton.Width div 2 );
     aButton.Top     := MainForm.ClientRect.Bottom - aButton.Height - 10 ;
     aButton.OnClick := AddClicks ;

     // Show the main form, Modaly. The ONLY reason to do this is because in this
     // demonstration if you only call the SHOW method, the form will appear and
     // disappear in a split second.
     MainForm.ShowModal ;
     
     Application.Run ;

  end. // Program</lang>

E

Library: Swing

Works with: E-on-Java

<lang e>when (currentVat.morphInto("awt")) -> {

   var clicks := 0
   def w := <swing:makeJFrame>("Rosetta Code 'Simple Windowed Application'")
   w.setContentPane(JPanel`
       ${def l := <swing:makeJLabel>("There have been no clicks yet.")} $\
           ${def b := <swing:makeJButton>("Click Me")}
   `)
   b.addActionListener(def _ {
       to actionPerformed(_) { 
           clicks += 1
           l.setText(`Number of clicks: $clicks`)
       }
   })
   w.pack()
   w.show()

}</lang>

EchoLisp

UI elements are HTML DOM Nodes. ui-add adds an element to the UI. ui-on-event adds a (Lisp) event handler to an element. <lang scheme> (define (ui-add-button text) ;; helper

   (define b (ui-create-element "button" '((type "button"))))
   (ui-set-html b text)
   (ui-add b))

(define (panel )

   (ui-clear)
   (define *clicks* 0)
   (define text (ui-create-element "span" '((style "font-weight:bold"))))
   (ui-add text)
   (ui-set-html text "No click yet")

   (define btn (ui-add-button "Click-me"))
   (define (count-clicks elem)
       (++ *clicks*)
       (ui-set-html text *clicks*))
   (ui-on-click btn count-clicks)

   (stdout-hide #t)
   (stdin-hide #t)) ;; end panel definition

(panel) </lang>

Elena

<lang elena>#import system.

import forms.
import extensions.

class Window

{

   #field form.
   #field lblClicks.
   #field btmClickMe.    
   #field clicksCount.
   
   #constructor new
   [        
       form := SDIDialog new.
       lblClicks := Label new.
       btmClickMe := Button new.
       
       clicksCount := 0.
       
       form controls append:lblClicks.    
       form controls append:btmClickMe.
   
       form set &caption:"Rosseta Code".
       form set &x:100 &y:100.
       form set &width:160 &height:80.
   
       lblClicks set &x:10 &y:2.
       lblClicks set &width:160 &height:20.
       lblClicks set &caption:"Clicks: 0".
       
       btmClickMe set &x:7 &y:20.
       btmClickMe set &width:140 &height:30.
       btmClickMe set &caption:"Click me".
       btmClickMe set &onClick:args

           [ $self $onButtonClick. ].
   ]
   
   #method $onButtonClick
   [
       clicksCount := clicksCount + 1.
       lblClicks set &caption:("Clicks: " + clicksCount literal).
   ]
   
   #method => form.

}</lang>

Euphoria

EuWinGUI

Library: EuWinGUI

<lang euphoria>include EuWinGUI.ew

Window("EuWinGUI - Simple windowed application",100,100,360,100) constant Button1 = Control(Button,"Click me",250,20,80,25) constant Label1 = Control(Label,"There have been no clicks yet",10,25,200,18)

integer clicks clicks = 0

-- Event loop while 1 do

   WaitEvent()
   if EventOwner = Button1 and Event = Click then
       clicks += 1
       SetText(Label1,sprintf("You clicked me %d times",clicks))
   end if

end while

CloseApp(0)</lang>

F#

Translation of: C#

<lang fsharp>open System.Windows.Forms

let mutable clickCount = 0

let form = new Form()

let label = new Label(Text = "There have been no clicks yet.", Dock = DockStyle.Top) form.Controls.Add(label)

let button = new Button(Text = "Click me", Dock = DockStyle.Bottom) button.Click.Add(fun _ ->

   clickCount <- clickCount+1
   label.Text <- sprintf "Number of clicks: %i." clickCount)

form.Controls.Add(button)

Application.Run(form)</lang>

Fantom

<lang fantom> using fwt using gfx

class SimpleApplication {

 public static Void main ()
 {
   Window
   {
     title = "Simple Window Application"
     size = Size(350, 50)
     clicked := 0
     label := Label
     {
       text = "There have been no clicks yet"
     }
     Button
     {
       text = "Click me"
       onAction.add |Event e|
       {
         clicked += 1
         label.text = "There have been $clicked clicks"
       }
     },
     label,
   }.open
 }

} </lang>

Forth

Works with: bigFORTH

Library: MINOS

<lang forth>also minos text-label ptr click-label Variable click# click# off

click-win ( -- ) screen self window new window with

   X" There have been no clicks yet" text-label new
     dup F bind click-label
   ^ S[ 1 click# +!
        click# @ 0 <# #S s" Number of clicks: " holds #>
        click-label assign ]S X" Click me" button new
   &2 vabox new panel s" Clicks" assign show endwith ;

click-win</lang>

The same with Theseus

Library: Theseus

<lang forth>#! xbigforth \ automatic generated code \ do not edit

also editor also minos also forth

component class ccount public:

 early widget
 early open
 early dialog
 early open-app
 text-label ptr click#
( [varstart] ) cell var clicks ( [varend] )

how:

 : open     new DF[ 0 ]DF s" Click counter" open-component ;
 : dialog   new DF[ 0 ]DF s" Click counter" open-dialog ;
 : open-app new DF[ 0 ]DF s" Click counter" open-application ;

class;

ccount implements

( [methodstart] )  ( [methodend] )
 : widget  ( [dumpstart] )
       X" There have been no clicks yet" text-label new  ^^bind click#
       ^^ S[ 1 clicks +!

clicks @ 0 <# #S s" Number of clicks: " holds #> click# assign ]S ( MINOS ) X" Click me" button new

     &2 vabox new panel
   ( [dumpend] ) ;
 : init  ^>^^  assign  widget 1 :: init ;

class;

main

 ccount open-app
 $1 0 ?DO  stop  LOOP bye ;

script? [IF] main [THEN] previous previous previous</lang>

FreeBasic

Include "windows.bi"

Dim As HWND Window_Main, Static_Text, Button_Click Dim As MSG msg Dim As Integer Num_Click Dim As String Text

'Create a window with a static text control and a button: Window_Main = CreateWindow("#32770", "Simple Windowed Application", WS_OVERLAPPEDWINDOW Or WS_VISIBLE, 100, 100, 350, 200, 0, 0, 0, 0) Static_Text = CreateWindow("STATIC", "There have been no clicks yet", WS_VISIBLE Or WS_CHILD Or WS_BORDER, 10, 30, 300, 20, Window_Main, 0, 0, 0) Button_Click = CreateWindow("BUTTON", "Click me", WS_VISIBLE Or WS_CHILD, 100, 70, 100, 20, Window_Main, 0, 0, 0)

'Windows message loop: Num_Click = 0 While GetMessage(@msg, Window_Main, 0, 0)

 TranslateMessage(@msg)
 DispatchMessage(@msg)
 Select Case msg.hwnd
   Case Button_Click
     If msg.message = WM_LBUTTONDOWN Then
       Num_Click = Num_Click + 1
       If Num_Click = 1 Then 
         Text = "Button has been clicked once"
       Else
         Text = "Button has been clicked " + Str(Num_Click) + " times"
       End If

SetWindowText(Static_Text, Text)

     End If
   Case Window_Main
     If msg.message = WM_COMMAND Then End
 End Select

Wend

End </lang>

Go

Library: go-gtk

<lang go>package main

import (

   "fmt"
   "github.com/mattn/go-gtk/gtk"

)

func main() {

   gtk.Init(nil)
   window := gtk.NewWindow(gtk.WINDOW_TOPLEVEL)
   window.SetTitle("Click me")
   label := gtk.NewLabel("There have been no clicks yet")
   var clicks int
   button := gtk.NewButtonWithLabel("click me")
   button.Clicked(func() {
       clicks++
       if clicks == 1 {
           label.SetLabel("Button clicked 1 time")
       } else {
           label.SetLabel(fmt.Sprintf("Button clicked %d times",
               clicks))
       }
   })
   vbox := gtk.NewVBox(false, 1)
   vbox.Add(label)
   vbox.Add(button)
   window.Add(vbox)
   window.Connect("destroy", func() {
       gtk.MainQuit()
   })
   window.ShowAll()
   gtk.Main()

}</lang>

Groovy

<lang groovy>import groovy.swing.SwingBuilder

count = 0 new SwingBuilder().edt {

 frame(title:'Click frame', pack: true, show: true) {
   vbox {  
     countLabel = label("There have been no clicks yet.")
     button('Click Me', actionPerformed: {count++; countLabel.text = "Clicked ${count} time(s)."})
   }
 }

}</lang>

with binding: <lang groovy>import groovy.swing.SwingBuilder import groovy.beans.Bindable

@Bindable class Model {

  Integer count = 0

} model = new Model() new SwingBuilder().edt {

 frame(title:'Click frame', pack: true, show: true) {
   vbox {  
     label(text: bind(source: model, sourceProperty: 'count',
       converter: { v -> !v ? "There have been no clicks yet." : "Clicked ${v} time(s)."}))
     button('Click Me', actionPerformed: {model.count++})
   }
 }

}</lang>

Haskell

Library: Gtk

from HackageDB

<lang haskell>import Graphics.UI.Gtk import Data.IORef

main :: IO () main = do

 initGUI
 window <- windowNew
 window `onDestroy` mainQuit
 windowSetTitle window "Simple Windowed App"
 set window [ containerBorderWidth := 10 ]

 hbox <- hBoxNew True 5

 set window [ containerChild := hbox ]
 
 lab <- labelNew (Just "There have been no clicks yet")
 button <- buttonNewWithLabel "Click me"
 set hbox [ containerChild := lab ]
 set hbox [ containerChild := button ]
 
 m <- newIORef 0

 onClicked button $ do
   v <- readIORef m
   writeIORef m (v+1)
   set lab [ labelText := "There have been " ++ show (v+1) ++ " clicks" ]

 widgetShowAll window

 mainGUI</lang>

HicEst

<lang hicest> CHARACTER label="There have been no clicks yet"

   DO count = 1, 1E100 ! "forever"
     DLG(Button="Click me", Width=3, TItle=label) ! Width=3 to display full length label
     label = "Clicked " // count // "time(s)"
   ENDDO

END</lang>

Icon and Unicon

This version is Unicon-specific: <lang unicon>import gui $include "guih.icn"

procedure main()

  SimpleWindow().show_modal()

end

class SimpleWindow : Dialog(label, button, count)

  method component_setup()
     self.set_attribs("size=222,139")
     label := Label()
     label.set_pos("24", "24")
     label.set_internal_alignment("l")
     label.set_label("There have been no clicks yet.")
     self.add(label)
     button := TextButton()
     button.set_pos(24, 53)
     button.set_label("click me")
     button.set_internal_alignment("c")
     button.connect(self, "incr", ACTION_EVENT)
     self.add(button)
  end

  method incr()
      /count := 0
      label.set_label("There have been "||(count+:=1)||" clicks.")
   end

  initially
     self.Dialog.initially()

end</lang>

IDL

<lang idl>pro counter, ev

 widget_control, ev.top, get_uvalue=tst
 tst[1] = tst[1]+1
 widget_control, tst[0], set_value="Number of clicks: "+string(tst[1],format='(i0)')
 widget_control, ev.top, set_uvalue=tst

end

id = widget_base(title = 'Window Title',column=1) ld = widget_label(id, value = 'There have been no clicks yet.') widget_control, /realize, id, set_uvalue=[ld,0] dummy = widget_button(id,value=' Click Me ',event_pro='counter') xmanager, "Simple", Id

end</lang>

J

J 8.x <lang j>SIMPLEAPP=: noun define pc simpleApp; cc inc button;cn "Click me"; cc shownText static;cn "There have been no clicks yet."; )

simpleApp_run=: verb define

 wd SIMPLEAPP
 simpleApp_accum=: 0   NB. initialize accumulator
 wd 'pshow;'

)

simpleApp_inc_button=: verb define

 wd 'set shownText text ','Button-use count:  ',": simpleApp_accum=: >: simpleApp_accum

)

simpleApp_close=: wd bind 'pclose' simpleApp_cancel=: simpleApp_close

simpleApp_run</lang>

J 6.x <lang j>SIMPLEAPP=: noun define pc simpleApp; xywh 131 11 44 12;cc inc button;cn "Click me"; xywh 7 10 115 11;cc shownText static;cn "There have been no clicks yet."; pas 6 6;pcenter; rem form end; )

simpleApp_run=: verb define

 wd SIMPLEAPP
 simpleApp_accum=: 0   NB. initialize accumulator
 wd 'pshow;'

)

simpleApp_inc_button=: verb define

 wd 'set shownText *','Button-use count:  ',": simpleApp_accum=: >: simpleApp_accum

)

simpleApp_close=: wd bind 'pclose' simpleApp_cancel=: simpleApp_close

simpleApp_run</lang>

Java

Library: AWT

Library: Swing

<lang java>import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; public class Clicks extends JFrame implements ActionListener{ private long clicks = 0; private JLabel label; private JButton clicker; private String text;

public Clicks(){ text = "There have been no clicks yet"; label = new JLabel(text); clicker = new JButton("click me"); clicker.addActionListener(this);//listen to the button setLayout(new BorderLayout());//handles placement of components add(label,BorderLayout.CENTER);//add the label to the biggest section add(clicker,BorderLayout.SOUTH);//put the button underneath it setSize(300,200);//stretch out the window setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//stop the program on "X" setVisible(true);//show it } public static void main(String[] args){ new Clicks();//call the constructor where all the magic happens } public void actionPerformed(ActionEvent arg0) { if(arg0.getSource() == clicker){//if they clicked the button text = "There have been " + (++clicks) + " clicks"; label.setText(text);//change the text }

} }</lang>

JavaFX Script

Library: JavaFX 1.2

<lang javafx>import javafx.stage.*; import javafx.scene.*; import javafx.scene.layout.*; import javafx.scene.control.*;

Stage {

  scene: Scene {
     width: 300 height: 200
     content: VBox {
        var clicks: Integer;

        spacing: 10
        content: [
           Label {
              def varText = bind if (clicks == 0) then "no clicks yet" else "{clicks} clicks"
              text : bind "There have been {varText}"
           }
           Button {
              text: "click me"
              onMouseClicked: function(e) { clicks++; }
           }
        ]
     }
  }

}</lang>

Liberty BASIC

<lang lb>nomainwin

   button #demo.btn, "Click Me", [btnClick], UL, 20, 50
   statictext #demo.num, "There have been no clicks yet.", 20, 100, 240, 30
   open "Rosetta Task: Simple windowed application" for window as #demo
   #demo "trapclose [quit]"
   nClicks = 0

wait

[quit]

   close #demo

end

[btnClick]

   nClicks = nClicks + 1
   #demo.num "The button has been clicked ";nClicks;" times."

wait</lang>

Logo

Works with: MSWlogo

<lang logo>to clickwindow windowCreate "root "clickWin [Click that button!!!] 0 0 100 100 [] Make "i 0 staticCreate "clickWin "clickSt [There have been no clicks yet] 0 0 100 20 buttonCreate "clickWin "clickBtn [click me] 10 20 80 20 ~ [Make "i :i+1 ~ ifelse :i=1 [staticUpdate "clickSt (list "clicked :i "time)] ~ [staticUpdate "clickSt (list "clicked :i "times)]] end</lang>

The window is opened with: <lang logo>clickwindow</lang>

Lua

<lang lua>require"iuplua" l = iup.label{title="There have been no clicks yet."} b = iup.button{title="Click me!"} clicks = 0 function b:button_cb()

 clicks = clicks + 1
 l.title = "There have been " .. clicks/2 .. " clicks so far." --yes, this is correct.

end dlg = iup.dialog{iup.vbox{l, b}, title="Simple Windowed Application"} dlg:show()

if (not iup.MainLoopLevel or iup.MainLoopLevel()==0) then

 iup.MainLoop()

end</lang>

Mathematica

<lang Mathematica>DynamicModule[{n = 0},

CreateDialog[{Dynamic@
   TextCell@If[n == 0, "There have been no clicks yet", n], 
  Button["click me", n++]}]]</lang>

MAXScript

<lang maxscript>rollout buttonClick "Button Click" (

   label l "There have been no clicks yet"
   button clickMe "Click me"
   local clickCount = 0

   on clickMe pressed do
   (
       clickCount += 1
       l.text = ("Number of clicks: " + clickCount as string)
   )

) createDialog buttonClick</lang>

Modula-3

Library: Trestle

This code uses Trestle, a windowing toolkit developed for Modula-3. <lang modula3>MODULE Click EXPORTS Main;

IMPORT Fmt, TextVBT, ButtonVBT, VBT, Axis, HVSplit, TrestleComm, Trestle;

VAR label := TextVBT.New("There have been no clicks yet.");

   button := ButtonVBT.New(TextVBT.New("Click me!"), Clicked);
   main := HVSplit.Cons(Axis.T.Ver, label, button, adjustable := FALSE);
   count := 0;

PROCEDURE Clicked(<*UNUSED*>button: ButtonVBT.T; <*UNUSED*>READONLY cd: VBT.MouseRec) =

 BEGIN
   INC(count);
   TextVBT.Put(label, "Button pressed: " & Fmt.Int(count));
 END Clicked;

<*FATAL TrestleComm.Failure*> BEGIN

 Trestle.Install(main);
 Trestle.AwaitDelete(main);

END Click.</lang>

To compile the above code, you need to create a file called m3makefile which contains:

import("ui")
import("libm3")
implementation("Click")
program("Click")

Nim

<lang nim> import gtk2

var

 win = windowNew WINDOW_TOPLEVEL
 button = buttonNew "Click me"
 label = labelNew  "There have been no clicks yet"
 vbox = vboxNew(true, 1)
 counter = 0

proc clickedMe(o: var PButton, l: PLabel) =

 inc counter
 l.setText "You clicked me " & $counter & " times"

nim_init() win.setTitle "Click me" vbox.add label vbox.add button win.add vbox discard win.signal_connect("delete-event", SignalFunc mainQuit, nil) discard button.signal_connect("clicked", SignalFunc clickedMe, label) win.showAll() main()</lang>

Objective-C

Works with: GNUstep

<lang objc>#include <Foundation/Foundation.h>

include <AppKit/AppKit.h>

@interface ClickMe : NSWindow {

 NSButton *_button;
 NSTextField *_text;
 int _counter;

} - (void)applicationDidFinishLaunching: (NSNotification *)notification; - (BOOL)applicationShouldTerminateAfterLastWindowClosed: (NSNotification *)notification; - (void)advanceCounter: (id)sender; @end</lang>

<lang objc>@implementation ClickMe : NSWindow -(instancetype) init {

 NSButton *button = [[NSButton alloc] init];
 [button setButtonType: NSToggleButton];
 [button setTitle: @"Click Me"];
 [button sizeToFit];
 [button setTarget: self];
 [button setAction: @selector(advanceCounter:)];
 NSRect buttonRect = [button frame];

 NSTextField *text = [[NSTextField alloc]

initWithFrame: NSMakeRect(buttonRect.origin.x, buttonRect.size.height, buttonRect.size.width, buttonRect.size.height)];

 [text setAlignment: NSCenterTextAlignment];
 [text setEditable: NO];
 [text setStringValue: @"There have been no clicks yet"];
 [text sizeToFit];

 // reset size of button according to size of (larger...?) text
 [button 
   setFrameSize: NSMakeSize( [text frame].size.width, buttonRect.size.height ) ];

 int totalWindowHeight = buttonRect.size.height + [text frame].size.height;
 
 if ((self = [super initWithContentRect: NSMakeRect(100, 100,

[text frame].size.width, totalWindowHeight)

       styleMask: (NSTitledWindowMask | NSClosableWindowMask)
     backing: NSBackingStoreBuffered
     defer: NO])) {
   _counter = 0;
   _button = button;
   _text = text;

   [[self contentView] addSubview: _text];
   [[self contentView] addSubview: _button];

   [self setTitle: @"Click Me!"];
   [self center];
 }
 return self;

}

- (void)applicationDidFinishLaunching: (NSNotification *)notification {

 [self orderFront: self];

}

- (BOOL)applicationShouldTerminateAfterLastWindowClosed: (NSNotification *)notification {

 return YES;

}

- (void)advanceCounter: (id)sender {

 [_text setStringValue: [NSString stringWithFormat: @"Clicked %d times", ++_counter]];

} @end

int main() {

 @autoreleasepool {
   NSApplication *app =  [NSApplication sharedApplication];
   ClickMe *clickme = [[ClickMe alloc] init];
   [app setDelegate: clickme];
   [app run];
 }
 return 0;

}</lang>

OCaml

with Labltk, the Tk OCaml binding:

<lang ocaml>#directory "+labltk"

load "labltk.cma"

let () =

 let top = Tk.openTk() in
 Wm.title_set top "Tk-OCaml Example";
 let label = Label.create ~text:"There have been no clicks yet" top in
 let b =
   Button.create
       ~text:"click me"
       ~command:(fun () -> Tk.closeTk (); exit 0)
       top
 in
 Tk.pack [Tk.coe label; Tk.coe b];
 Tk.mainLoop ();

</lang>

with LablGTK2, the GTK2 OCaml binding:

<lang ocaml>open GMain

let window = GWindow.window ~border_width:2 () let vbox = GPack.vbox ~packing:window#add () let label = GMisc.label ~text:"There have been no clicks yet" ~packing:vbox#pack () let button = GButton.button ~label:"click me" ~packing:vbox#pack ()

let () =

 window#event#connect#delete ~callback:(fun _ -> true);
 window#connect#destroy ~callback:Main.quit;
 button#connect#clicked ~callback:window#destroy;
 window#show ();
 Main.main ()</lang>

ooRexx

<lang oorexx>/* REXX ***************************************************************************************

18.06.2014 Walter Pachl shortened from Rony Flatscher's bsf4oorexx (see sourceforge) samples
Look there for ShowCount.rxj
bsf4oorexx lets the ooRexx program use Java classes
- - - - /

userData=.directory~new -- a directory which will be passed to Rexx with the event

  --  create a framed Java window, set a title text

win=.bsf~new("java.awt.Frame", "Show Count")

  -- Create a Java RexxProxy for controlling the closing of the application

rexxCloseEH =.RexxCloseAppEventHandler~new -- Rexx event handler

  -- Create Java RexxProxy for the Rexx event handler

rpCloseEH=BsfCreateRexxProxy(rexxCloseEH,,"java.awt.event.WindowListener" ) win~addWindowListener(rpCloseEH) -- add RexxProxy event handler

  -- create a Java push button

but=.bsf~new("java.awt.Button","Press me!")

  -- Create a RexxProxy for the button Rexx event handler

rp=BsfCreateRexxProxy(.RexxShowCountEventHandler~new,userData,"java.awt.event.ActionListener") but~addActionListener(rp) -- add RexxProxy event handler

lab=.bsf~new("java.awt.Label") -- create a Java label,set it to show the text centered userData~label=lab -- save label object for later use in event handler lab~setAlignment(lab~center) -- set alignment to center lab~setText("Button was not yet pressed") -- assign initial text to the label

win ~~add("Center",lab) ~~add("South",but) -- add the label and the button to the frame win ~~pack -- now calculate all widget dimensions call enlargeWidth win,but,120 -- enlarge the width of the frame and the button

win ~~setVisible(.true) ~~toFront -- make frame visible and move it to the front

userData~i=0 -- set counter to 0

rexxCloseEH~waitForExit -- wait until we are allowed to end the program

-- if Java was loaded by Rexx,then terminate Java's RexxEngine to inhibit callbacks from Java call BSF.terminateRexxEngine

requires BSF.CLS -- get Java support

  /* enlarge the width of the frame and of the button without using a layout manager  */

routine enlargeWidth

 use arg win,but,addToWidth
 winDim=win~getSize            -- get frame's dimension
 winDim~width+=addToWidth      -- increase width
 win~setSize(winDim)           -- set frame's dimension

/* ------------------------------------------------------------------------ */ /* Rexx event handler to set "close app" indicator */

class RexxCloseAppEventHandler

method init -- constructor

 expose closeApp
 closeApp  = .false            -- if set to .true, then it is safe to close the app

attribute closeApp -- indicates whether app should be closed

method unknown -- intercept unhandled events,do nothing

method windowClosing -- event method (from WindowListener)

 expose closeApp
 closeApp=.true                -- indicate that the app should close

method waitForExit -- method blocks until attribute is set to .true

 expose closeApp
 guard on when closeApp=.true

/* ------------------------------------------------------------------------ */ /* Rexx event handler to process tab changes */

class RexxShowCountEventHandler

method actionPerformed

 use arg eventObject,slotDir
 call showCount slotDir~userData

/* ------------------------------------------------------------------------ */

routine ShowCount -- increment counter and show text

  use arg userData
  userData~i+=1                -- increment counter in directory object
  Select                       -- construct text part
    When userData~i=1 Then how_often='once'
    When userData~i=2 Then how_often='twice'
    When userData~i=3 Then how_often='three times'
    Otherwise how_often=userData~i 'times'
  End
  userData~label~setText("Button was pressed" how_often) -- display text</lang>

Oz

<lang oz>functor import

  Application
  QTk at 'x-oz://system/wp/QTk.ozf'

define

  Count = {NewCell 0}
  Label
  GUI = td(action:proc {$} {Application.exit 0} end %% exit on close

label(text:"There have been no clicks yet." handle:Label) button(text:"Click Me" action:proc {$} Count := @Count + 1 {Label set(text:"Number of clicks: "#@Count#".")} end ))

  Window = {QTk.build GUI}
  {Window show}

end </lang>

Pascal

Works with: Free_Pascal

Library: SysUtils

Library: glib2

Library: Gtk2

Ported from the C example. <lang pascal>Program SimpleWindowApplication;

uses

 SysUtils,
 glib2,
 Gtk2;

const

 clickme = 'Click Me';
 MAXLEN = 64;

var

 counter: integer = 0;

procedure clickedme(o: PGtkButton; d: pointer); cdecl;

 var
   nt: Pchar;
   l: PGtkLabel;
 begin
   l := Gtk_LABEL(d);
   inc(counter);
   nt := Pchar('You clicked me ' + inttostr(counter) + ' times');
   Gtk_label_set_text(l, nt);
 end;

var

 win:     PGtkWindow;
 button:  PGtkButton;
 Mylabel: PGtkLabel;
 vbox:    PGtkVBox;

begin

 Gtk_init(@argc, @argv);
 win := PGtkWindow(Gtk_window_new(Gtk_WINDOW_TOPLEVEL));
 Gtk_window_set_title(win, clickme);
 button := PGtkButton(Gtk_button_new_with_label(clickme));
 Mylabel := PGtkLabel(Gtk_label_new('There have been no clicks yet'));
 Gtk_label_set_single_line_mode(Mylabel, TRUE);
 vbox := PGtkVBox(Gtk_vbox_new(TRUE, 1));
 Gtk_container_add(Gtk_CONTAINER(vbox), Gtk_WIDGET(Mylabel));
 Gtk_container_add(Gtk_CONTAINER(vbox), Gtk_WIDGET(button));
 Gtk_container_add(Gtk_CONTAINER(win), Gtk_WIDGET(vbox));
 g_signal_connect(G_OBJECT(win), 'delete-event', TGCallBack(@Gtk_main_quit), NULL);
 g_signal_connect(G_OBJECT(button), 'clicked', TGCallBack(@clickedme), Mylabel);
 Gtk_widget_show_all(Gtk_WIDGET(win));
 Gtk_main();

end.</lang>

Perl

Library: Perl/Tk

<lang perl>use Tk;

$main = MainWindow->new; $l = $main->Label('-text' => 'There have been no clicks yet.')->pack; $count = 0; $main->Button(

 -text => ' Click Me ',
 -command => sub { $l->configure(-text => 'Number of clicks: '.(++$count).'.'); },

)->pack; MainLoop();</lang>

Library: GTK

Works with: Perl/Gtk

<lang perl>use Gtk '-init';

Window.

$window = Gtk::Window->new; $window->signal_connect('destroy' => sub { Gtk->main_quit; });

VBox.

$vbox = Gtk::VBox->new(0, 0); $window->add($vbox);

Label.

$label = Gtk::Label->new('There have been no clicks yet.'); $vbox->add($label);

Button.

$count = 0; $button = Gtk::Button->new(' Click Me '); $vbox->add($button); $button->signal_connect('clicked', sub {

 $label->set_text(++$count);

});

Show.

$window->show_all;

Main loop.

Gtk->main;</lang>

Library: XUL::Gui Gui

<lang perl>use XUL::Gui;

display

   TextBox( id=>'txt', value=>'there have been no clicks yet' ),
   Button( label=>'click me', oncommand=>sub{
       $ID{txt}->value = ++$clicks
   });</lang>

Perl 6

Library: GTK

<lang perl6>use GTK::Simple;

my GTK::Simple::App $app .= new(title => 'Simple Windowed Application');

$app.size_request(350, 100);

$app.set_content(

   GTK::Simple::VBox.new(
       my $label  = GTK::Simple::Label.new( text  => 'There have been no clicks yet'),
       my $button = GTK::Simple::Button.new(label => 'click me'),
   )

);

$app.border_width = 40;

$button.clicked.tap: {

   state $clicks += 1;
   $label.text = "There has been $clicks click{ 's' if $clicks != 1 }";

}

$app.run;</lang>

Phix

<lang Phix>include arwen.ew

constant main = create(Window,"myApp",0,0,100,100,300,200, 0) constant label = create(Label, "There have been no clicks yet",0,main,10,10,250,30,0) constant btn = create(Button,"Click me",0,main,100,50,100,30,0) integer count = 0

function mainHandler(integer id, integer msg, atom wParam, object lParam) without warning

   if id=btn and msg=WM_COMMAND then
       count += 1
       setText(label,sprintf("clicked %d times",count))
   end if
   return 0

end function setHandler(btn,routine_id("mainHandler"))

WinMain(main,SW_NORMAL)</lang> The without warning just stops messages about wParam and lParam not being used. The included demo\edita contains a window painter that lets you reposition/resize the above controls very easily.

PicoLisp

The standard PicoLisp GUI is HTTP based. Connect your browser to http://localhost:8080 after starting the following script. <lang PicoLisp>#!/usr/bin/picolisp /usr/lib/picolisp/lib.l

(load "@ext.l" "@lib/http.l" "@lib/xhtml.l" "@lib/form.l")

(zero *Count)

(de start ()

  (app)
  (action
     (html 0 "Clicks" NIL NIL
        (form NIL
           (gui '(+Init +TextField) "There have been no clicks yet")
           (----)
           (gui '(+JS +Button) "click me"
              '(set> (field -1)
                 (pack "Clicked " (inc '*Count) " times") ) ) ) ) ) )

(server 8080 "!start") (wait)</lang>

Pike

Library: Gtk2

<lang Pike>GTK2.Widget mainwindow,clickcnt,clicker; int clicks;

void click() {

       clickcnt->set_text("Clicks: "+(++clicks));

}

int main() {

       GTK2.setup_gtk();
       mainwindow=GTK2.Window(GTK2.WindowToplevel);
       mainwindow->set_title("Click counter");
       mainwindow->add(GTK2.Vbox(0,10)
               ->add(clickcnt=GTK2.Label("There have been no clicks yet"))
               ->add(clicker=GTK2.Button("Click me"))
       )->show_all();
       mainwindow->signal_connect("delete_event",lambda() {exit(0);});
       clicker->signal_connect("clicked",click);
       return -1;

} </lang>

PowerShell

Windows Forms

Works with: PowerShell version 3

<lang PowerShell> $Label1 = [System.Windows.Forms.Label]@{

           Text = 'There have been no clicks yet'
           Size = '200, 20' }

$Button1 = [System.Windows.Forms.Button]@{

           Text = 'Click me'
           Location = '0, 20' }

$Button1.Add_Click(

   {
   $Script:Clicks++
   If ( $Clicks -eq 1 ) { $Label1.Text = "There has been 1 click" }
   Else                 { $Label1.Text = "There have been $Clicks clicks" }
   } )

$Form1 = New-Object System.Windows.Forms.Form $Form1.Controls.AddRange( @( $Label1, $Button1 ) )

$Clicks = 0

$Result = $Form1.ShowDialog() </lang>

Works with: PowerShell version 2

<lang PowerShell> Add-Type -AssemblyName System.Windows.Forms

$Label1 = New-Object System.Windows.Forms.Label $Label1.Text = 'There have been no clicks yet' $Label1.Size = '200, 20'

$Button1 = New-Object System.Windows.Forms.Button $Button1.Text = 'Click me' $Button1.Location = '0, 20'

$Button1.Add_Click(

   {
   $Script:Clicks++
   If ( $Clicks -eq 1 ) { $Label1.Text = "There has been 1 click" }
   Else                 { $Label1.Text = "There have been $Clicks clicks" }
   } )

$Form1 = New-Object System.Windows.Forms.Form $Form1.Controls.AddRange( @( $Label1, $Button1 ) )

$Clicks = 0

$Result = $Form1.ShowDialog() </lang>

WPF

<lang PowerShell> [xml]$Xaml = @" <Window

   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   x:Name = "Window1"
   Width  = "200"
   Height = "120"
   ShowInTaskbar = "True">
   <StackPanel>
       <Label
           x:Name  = "Label1"
           Height  = "40"
           Width   = "200"
           Content = "There have been no clicks"/>
       <Button
           x:Name  = "Button1"
           Height  = "25"
           Width   = "60"
           Content = "Click me"/>
   </StackPanel>

</Window> "@

$Window1 = [Windows.Markup.XamlReader]::Load( [System.Xml.XmlNodeReader]$Xaml )

$Label1 = $Window1.FindName( "Label1" ) $Button1 = $Window1.FindName( "Button1" )

$Button1.Add_Click(

   {
   $Script:Clicks++
   If ( $Clicks -eq 1 ) { $Label1.Content = "There has been 1 click" }
   Else                 { $Label1.Content = "There have been $Clicks clicks" }
   } )

$Clicks = 0

$Result = $Window1.ShowDialog() </lang>

Prolog

Works with SWI-Prolog and XPCE. <lang Prolog>:- dynamic click/1.

dialog('Simple windowed application',

      [ object        :=

Simple_windowed_application, parts := [ Simple_windowed_application := dialog('Simple windowed application'), Name := label(name, 'There have been no clicks yet'), BtnClick := button(button) ], modifications := [ BtnClick := [ label := 'Click me !' ] ], layout := [ area(Name, area(40, 20, 200, 18)), area(BtnClick, area(90, 60, 80, 24)) ], behaviour := [ BtnClick := [message := message(@prolog, btnclick, Name)] ]

]).

btnclick(Label) :- retract(click(V)), V1 is V+1, assert(click(V1)), sformat(A, '~w click(s)', [V1]), send(Label, selection, A).

simple_windowed :- retractall(click(_)), assert(click(0)), make_dialog(D, 'Simple windowed application'), send(D, open).

</lang>

PureBasic

<lang PureBasic>Define window_0 Define window_0_Text_0, window_0_Button_1 Define clicks, txt$, flags

flags = #PB_Window_SystemMenu | #PB_Window_SizeGadget | #PB_Window_ScreenCentered window_0 = OpenWindow(#PB_Any, 408, 104, 280, 45, "Simple windowed application", flags) If window_0

 SmartWindowRefresh(window_0, #True)
 window_0_Text_0 = TextGadget(#PB_Any, 5, 5, 165, 20, "There have been no clicks yet")
 window_0_Button_1 = ButtonGadget(#PB_Any, 190, 10, 85, 30, "Click me")

 Repeat
   Select WaitWindowEvent()
     Case #PB_Event_Gadget
       Select EventGadget()
         Case window_0_Text_0
         Case window_0_Button_1
           clicks + 1
           txt$ = "You Clicked " + Str(clicks) + " time"
           If clicks > 1: txt$ + "s": EndIf
           SetGadgetText(window_0_Text_0, txt$)
       EndSelect
     Case #PB_Event_CloseWindow
       End
   EndSelect
 ForEver

EndIf</lang>

Python

Library: Tkinter

<lang python>from Tkinter import Tk, Label, Button

def update_label():

   global n
   n += 1
   l["text"] = "Number of clicks: %d" % n

w = Tk() n = 0 l = Label(w, text="There have been no clicks yet") l.pack() Button(w, text="click me", command=update_label).pack() w.mainloop()</lang>

The same in OO manner

<lang python>#!/usr/bin/env python from Tkinter import Button, Frame, Label, Pack

class ClickCounter(Frame):

   def click(self):
       self.count += 1
       self.label['text'] = 'Number of clicks: %d' % self.count
       
   def createWidgets(self):
       self.label = Label(self, text='here have been no clicks yet')
       self.label.pack()
       self.button = Button(self, text='click me', command=self.click)
       self.button.pack()
       
   def __init__(self, master=None):
       Frame.__init__(self, master)
       Pack.config(self)
       self.createWidgets()
       self.count = 0

if __name__=="__main__":

   ClickCounter().mainloop()</lang>

Library: PyQt

<lang python>import sys from qt import *

def update_label():

   global i
   i += 1
   lbl.setText("Number of clicks: %i" % i)

i = 0 app = QApplication(sys.argv) win = QWidget() win.resize(200, 100) lbl = QLabel("There have been no clicks yet", win) lbl.setGeometry(0, 15, 200, 25) btn = QPushButton("click me", win) btn.setGeometry(50, 50, 100, 25) btn.connect(btn, SIGNAL("clicked()"), update_label) win.show() app.connect(app, SIGNAL("lastWindowClosed()"), app, SLOT("quit()")) app.exec_loop()</lang>

Library: wxPython

<lang python>import wx

class MyApp(wx.App):

 def click(self, event):
   self.count += 1
   self.label.SetLabel("Count: %d" % self.count)

 def OnInit(self):
   frame = wx.Frame(None, wx.ID_ANY, "Hello from wxPython")
   self.count = 0
   self.button = wx.Button(frame, wx.ID_ANY, "Click me!")
   self.label = wx.StaticText(frame, wx.ID_ANY, "Count: 0")
   self.Bind(wx.EVT_BUTTON, self.click, self.button)
   
   self.sizer = wx.BoxSizer(wx.VERTICAL)
   self.sizer.Add(self.button, True, wx.EXPAND)
   self.sizer.Add(self.label, True, wx.EXPAND)
   frame.SetSizer(self.sizer)
   frame.SetAutoLayout(True)
   self.sizer.Fit(frame)
   
   frame.Show(True)
   
   self.SetTopWindow(frame)
   return True

app = MyApp(0) app.MainLoop()</lang>

R

Library: gWidgets

Library: gWidgetstcltk

gWidgetsRGtk2 or gWidgetsrJava can be used as an alternative to gWidgetstcltk. <lang r>library(gWidgets) library(gWidgetstcltk) win <- gwindow() lab <- glabel("There have been no clicks yet", container=win) btn <- gbutton("click me", container=win, handle=function(h, ...)

  {
     val <- as.numeric(svalue(lab))
     svalue(lab) <- ifelse(is.na(val) ,"1", as.character(val + 1))
  }

)</lang>

Racket

lang racket/gui

(define frame (new frame% [label "There have been no clicks yet"]))

(define num-clicks 0) (define (cb obj me)

 (set! num-clicks (add1 num-clicks))
 (send frame set-label (format "~a" num-clicks)))

(new button% [parent frame] [label "Click me"] [callback cb]) (send frame show #t) </lang>

RapidQ

RapidQ has form designer that produces RapidQ Basic source code. You can get the same result by writing the code yourself with a text editor. Then compile it either from within IDE or by using the command line compiler.

<lang rapidq>DECLARE SUB buttonClick

CREATE form AS QForm

   Center
   Height = 120
   Width = 300

   CREATE text AS QLabel
       Caption = "There have been no clicks yet."
       Left = 30: Top = 20
   END CREATE

   CREATE button1 AS QButton
       Caption = "Click me"
       Left = 100: Top = 50: Height = 25: Width = 100
       OnClick = buttonClick
   END CREATE

END CREATE

SUB buttonClick

   STATIC count AS Integer
   count = count+1
   text.Caption = "Clicked " + STR$(count) + " times."

END SUB

form.ShowModal</lang>

REBOL

<lang REBOL>REBOL [ Title: "Simple Windowed Application" Author: oofoe Date: 2009-12-07 URL: http://rosettacode.org/wiki/Simple_Windowed_Application ]

clicks: 0

Simple GUI's in REBOL can be defined with 'layout', a
special-purpose language (dialect, in REBOL-speak) for specifying
interfaces. In the example below, I describe a gradient background
with a text label and a button. The block in the button section
details what should happen when it's clicked on -- increment the
number of clicks and update the label text.

The 'view' function paints the layout on the screen and listens for
events.

view layout [ backdrop effect [gradient 0x1 black coal]

label: vtext "There have been no clicks yet."

button maroon "click me" [ clicks: clicks + 1 set-face label reform ["clicks:" clicks] ] ]</lang>

Ring

<lang ring> Load "guilib.ring"

MyApp = New qApp {

       num = 0
       win1 = new qWidget() {
              setwindowtitle("Hello World")
              setGeometry(100,100,370,250)

              btn1 = new qpushbutton(win1) {
                   setGeometry(150,200,100,30)
                   settext("click me")
                   setclickevent("clickme()")}

                   Lineedit1 = new qlineedit(win1) {
                               setGeometry(10,100,350,30)}
       show()}
       Exec()}

func clickme

    num += 1
    lineedit1.settext( "you clicked me " + num + " times")

</lang> Output:

Ruby

Library: Ruby/Tk

<lang ruby>require 'tk' str = TkVariable.new("no clicks yet") count = 0 root = TkRoot.new TkLabel.new(root, "textvariable" => str).pack TkButton.new(root) do

 text "click me"
 command {str.value = count += 1}
 pack

end Tk.mainloop</lang>

Library: Shoes

<lang ruby>Shoes.app do

 stack do
   @count = 0
   @label = para "no clicks yet"
   button "click me" do 
     @count += 1
     @label.text = "click: #@count"
   end
 end

end</lang>

Run BASIC

<lang runbasic>msg$ = "There have been no clicks yet" [loop] cls ' clear screen print msg$ button #c, "Click Me", [clickMe] 'create a button with handle and goto [tag] wait

[clickMe] clicks = clicks + 1 msg$ = "Button has been clicked ";clicks;" times" goto [loop]</lang>

Scala

Library: Scala

<lang Scala>import scala.swing.{ BorderPanel, Button, Label, MainFrame, SimpleSwingApplication } import scala.swing.event.ButtonClicked

object SimpleApp extends SimpleSwingApplication {

 def top = new MainFrame {
   contents = new BorderPanel {
     var nClicks = 0

     val (button, label) = (new Button { text = "click me" },
       new Label { text = "There have been no clicks yet" })

     layout(button) = BorderPanel.Position.South
     layout(label) = BorderPanel.Position.Center
     listenTo(button)
     reactions += {
       case ButtonClicked(_) =>
         nClicks += 1
         label.text = s"There have been ${nClicks} clicks"
     }
   }
 }

}</lang>

Sidef

<lang ruby>require('Gtk2') -> init

Window.

var window = %s<Gtk2::Window>.new window.signal_connect('destroy' => { %s<Gtk2>.main_quit })

VBox.

var vbox = %s<Gtk2::VBox>.new(0, 0) window.add(vbox)

Label.

var label = %s<Gtk2::Label>.new('There have been no clicks yet.') vbox.add(label)

Button.

var count = 0 var button = %s<Gtk2::Button>.new(' Click Me ') vbox.add(button) button.signal_connect('clicked' => {

   label.set_text(++count)

})

Show.

window.show_all

Main loop.

%s<Gtk2>.main</lang>

Smalltalk

Works with: Smalltalk/X

<lang smalltalk>|top clickCount lh button|

clickCount := 0. lh := ValueHolder with:'There have been no clicks yet'.

top := StandardSystemView label:'Rosetta Simple Window'. top extent:300@100. top add:((Label new labelChannel:lh) origin: 0 @ 10 corner: 1.0 @ 40). top add:((button := Button label:'Eat Me') origin: 10 @ 50 corner: 100 @ 80).

button action:[

       clickCount := clickCount + 1.
       lh value: ('number of clicks: %1' bindWith:clickCount) 
      ].

top open</lang>

Tcl

Library: Tk

<lang tcl>package require Tk pack [label .l -text "There have been no clicks yet"] set count 0 pack [button .b -text "click me" -command upd] proc upd {} {

   .l configure -text "Number of clicks: [incr ::count]"

}</lang>

TI-89 BASIC

The Ti-89 does not have general onscreen buttons; this program uses the OK/Cancel choice of a dialog box to implement the UI.

<lang ti89b>Prgm

 Local clicks
 0 → clicks
 1 → ok    © System variable also set by Dialog statement
 While ok = 1
   Dialog
     Title "Rosetta Code"
     Text "There have been " & string(clicks) & " OKs"
   EndDlog
   clicks + 1 → clicks
 EndWhile

EndPrgm</lang>

Unicon

<lang unicon> import gui $include "guih.icn"

class SimpleApp : Dialog (label)

 # -- automatically called when the dialog is created
 method component_setup()
   # create and add the label
   label := Label("label=There have been no clicks yet","pos=50%,33%", "align=c,c")
   add (label)

   # create and add the button
   button := TextButton("label=Click me", "pos=50%,66%", "align=c,c")
   button.connect(self, "clicked", ACTION_EVENT)
   add (button)

   # some cosmetic settings for the window
   attrib("size=180,70", "bg=light gray")
 end

 method clicked ()
   static count := 0
   count +:= 1
   label.set_label ("Clicked " || count || " times")
 end

end

procedure main()

 local d := SimpleApp ()
 d.show_modal()

end </lang>

Vedit macro language

<lang vedit>Reg_Set(10, "There have been no clicks yet")

1 = 0

repeat (ALL) {

   #2 = Dialog_Input_1(3, "`Simple Windowed Application`,
                       `|@(10)`,
                       `[&Click me]`,`[&Exit]`",
                       APP+CENTER, 0, 0) 
   if (#2 != 1) { break }    // ESC or Exit
   #1++
   Num_Str(#1, 10)
   Reg_Set(10, "Clicked", INSERT)
   Reg_Set(10, " times", APPEND)

}</lang>

Visual Basic

In VB, windows are usually created in the IDE. The generated code is hidden from the user unless viewed outside of VB. For the sake of this task, I have included that code, but normally it is hidden from the programmer.

<lang vb>VERSION 5.00 Begin VB.Form Form2

  Caption         =   "There have been no clicks yet"
  ClientHeight    =   2940
  ClientLeft      =   60
  ClientTop       =   600
  ClientWidth     =   8340
  LinkTopic       =   "Form1"
  ScaleHeight     =   2940
  ScaleWidth      =   8340
  StartUpPosition =   3  'Windows Default
  Begin VB.CommandButton Command1 
     Caption         =   "Click me!"
     Height          =   495
     Left            =   3600
     TabIndex        =   0
     Top             =   1200
     Width           =   1215
  End

End Attribute VB_Name = "Form1" Attribute VB_GlobalNameSpace = False Attribute VB_Creatable = False Attribute VB_PredeclaredId = True Attribute VB_Exposed = False '-----user-written code begins here; everything above this line is hidden in the GUI----- Private clicked As Long

Private Sub Command1_Click()

   clicked = clicked + 1
   Me.Caption = clicked & " clicks."

End Sub </lang>

Web 68

<lang web68>@1Introduction. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public Licence as published by the Free Software Foundation, either version 3 of the Licence, or (at your option) any later version.

@m cvs simpleapp = "$Id: $"

@a@<Prelude@> BEGIN @<Included declarations@> @<Plain values in the outer reach@> @<Names in the outer reach@> @<Procedures in the outer reach@> @<Logic in the outer reach@> END @<Postlude@>

@ The local compiler requires a special prelude.@^system dependencies@>

@<Prel...@>= PROGRAM simpleapp CONTEXT VOID USE @<Library preludes@>

@ And a special postlude.@^system dependencies@>

@<Post...@>= FINISH

@ The program requires the predefined forms and the standard prelude.

@<Library...@>= simpleapp fd,standard

@ This Web 68 file provides the Xforms prelude.

@iforms.w@>

@1Initialisation. The initial processing consists of initialising the Xforms library.

@<Logic...@>= open(argf,"",arg channel); fl initialize(argc,argv,"simpleapp",NIL,0);

@ Declare the !REF FILE!.

@<Names...@>= FILE @!argf;

@1Main processing. The form is created in !simpleapp fd! the source code of which is 108 lines long. Firstly, define the callback for the button.

@<Proc...@>= button cb:=(REF FLOBJECT obj,INT data)VOID: ( clicks +:= 1; fl set object label(text box OF click form,whole(clicks,0)+" click"+ (clicks=1|""|"s")+" on the button") );

@ Declare !clicks!.

@<Plain...@>= INT clicks:=0;

@ Create the form, show it and hand control to the Xforms library.

@<Logic...@>= click form:=create form click; fl show form(click OF click form,fl place center,fl full border,"SimpleApp"); fl do forms

@ Declare the form.

@<Names...@>= REF FDCLICK click form;

@1Macro declarations. All the macros used in the program are declared here.

@<Include...@>= macro fl do forms; macro fl initialize; macro fl set object label; macro fl show form;

@ To compile the program, use this command:

   ca -l mod -l forms simpleapp.w68

The predefined form will have been compiled with this command:

   ca -m mod simpleappfd.w68

The predefined form was created by the fdesign program for the Xforms library, and the resulting form definition file was converted to Web 68 by the program fdtow68.</lang>

XPL0

<lang XPL0>include c:\cxpl\stdlib; \standard library provides mouse routines, etc. def Ww=40, Wh=12, Wx=(80-Ww)/2, Wy=(25-Wh)/2; \window width, etc. def Bw=11, Bh=4, Bx=Wx+(Ww-Bw)/2, By=Wy+3*(Wh-Bh)/4; \button size & position int Clicks, Mx, My; \number of clicks and mouse coordinates

[ShowCursor(false); \turn off flashing cursor Attrib($1F); \bright white characters on blue SetWind(Wx, Wy, Wx+Ww, Wy+Wh, 2, true); \blue window with no scroll DrawBox(Wx, Wy, Wx+Ww, Wy+Wh, 3); \draw borders Cursor(Wx+5, Wy+3); Text(6, "There have been no clicks yet."); DrawBox(Bx, By, Bx+Bw, By+Bh, 0); \draw button Cursor(Bx+2, By+2); Text(6, "Click me");

OpenMouse; ShowMouse(true); Clicks:= 0; repeat if GetMouseButton(0) then \left button down

               [while GetMouseButton(0) do []; \wait for release
               Mx:= GetMousePosition(0) / 8;   \character coordinates
               My:= GetMousePosition(1) / 8;
               if Mx>=Bx & Mx<=Bx+Bw & My>=By & My<=By+Bh then
                       [Clicks:= Clicks+1;     \mouse pointer is on the button
                       Cursor(Wx+4, Wy+3);
                       Text(6, "Times button has been clicked: ");
                       IntOut(6, Clicks);
                       ];
               ];

until ChkKey; \keystroke terminates program SetVid(3); \turn off mouse and turn on flashing cursor ]</lang>

Yorick

Yorick does not include a GUI toolkit. However, it does provide a plotting system that can emulate some basic GUI features, such as buttons and labels. The above sample uses a built-in library "button.i", which is itself written in Yorick.

<lang yorick>#include "button.i"

window, 0; btn_click = Button(text="click me", x=.395, y=.65, dx=0.04368, dy=0.0091); btn_quit = Button(text="quit", x=.395, y=.6, dx=0.02184, dy=0.0091); count = 0; msg = "There have been no clicks yet"; finished = 0; do {

   fma;
   plt, msg, .395, .7, justify="CH";
   button_plot, btn_click;
   button_plot, btn_quit;
   xy = mouse(0, 0, "");
   if(button_test(btn_click, xy(1), xy(2))) {
       count++;
       msg = swrite(format="Number of clicks: %d", count);
   } else if(button_test(btn_quit, xy(1), xy(2))) {
       finished = 1;
       winkill, 0;
   }

} while(!finished);</lang>

Revision as of 09:56, 3 October 2016

clickcounter.h

clickcounter.cpp

main.cpp

DFL

Hybrid

EuWinGUI

The same with Theseus

Icon and Unicon

Library: Perl/Tk

Library: GTK Works with: Perl/Gtk

Library: XUL::GuiGui

Windows Forms

WPF

Library: Tkinter

The same in OO manner

Library: wxPython

Library: GTK

Works with: Perl/Gtk

Library: XUL::Gui Gui