Simple windowed application: Difference between revisions
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script? [IF] main [THEN] |
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=={{header|Groovy}}== |
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import groovy.swing.SwingBuilder |
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def countLabel, count = 0, swing = new SwingBuilder() |
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def frame = swing.frame(title:'Click frame') { |
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flowLayout() |
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countLabel = label(text:"There have been no clicks yet." ) |
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button(text:'Click Me', actionPerformed: {count++; countLabel.text = "Clicked ${count} time(s)."}) |
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} |
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frame.pack() |
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frame.show() |
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=={{header|J}}== |
=={{header|J}}== |
Revision as of 08:07, 25 February 2008
You are encouraged to solve this task according to the task description, using any language you may know.
This task asks to create a window with a label that says "There have been no clicks yet" and 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.
Delphi
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.
-- 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
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() }
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
The same with Theseus
#! 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
Groovy
import groovy.swing.SwingBuilder def countLabel, count = 0, swing = new SwingBuilder() def frame = swing.frame(title:'Click frame') { flowLayout() countLabel = label(text:"There have been no clicks yet." ) button(text:'Click Me', actionPerformed: {count++; countLabel.text = "Clicked ${count} time(s)."}) } frame.pack() frame.show()
J
SIMPLEAPP=: 0 : 0 pc simpleApp; xywh 136 8 44 12;cc inc button;cn "Click me"; xywh 136 23 44 12;cc cancel button;cn "Cancel"; xywh 7 10 115 11;cc shownText static;cn "There have been no clicks yet."; pas 6 6;pcenter; rem form end; ) simpleApp_run=: 3 : 0 wd SIMPLEAPP simpleApp_accum=: 0 NB. initialize accumulator wd 'pshow;' ) simpleApp_close=: 3 : 0 wd'pclose' ) simpleApp_cancel_button=: 3 : 0 simpleApp_close'' ) simpleApp_inc_button=: 3 : 0 wd 'set shownText *','Button-use count: ',": simpleApp_accum=: >: simpleApp_accum ) simpleApp_run''
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
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
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();
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;
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()
The same in OO manner
#!/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()
Tcl
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]."}