1. #1
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    Default get Screen size to center Windows Login

    get Screen size to center Windows Login


    hi!

    i'm developing a chat for Software Engineering homework. we're learning GWT and we're using GXT to develop.

    first part of homework is "develop a chat login". I'm using "Windows form" and I almost finished the login windows. but I want to get screen size to situate this windows on center of any screen size. I know I should get browser screen, but I dont know how, least situate the windows on center.

    here my code source:

    Code:
    package com.mycompany.project.client;
    
    import com.extjs.gxt.ui.client.widget.MessageBox;
    
    
    public class LoginWindows extends Window {
        private LabelField lblfldUsername;
        private LabelField lblfldPassword;
        
        public LoginWindows() {
    
    
            setResizable(false);
            setHeading("Ventana de Login");
            CenterLayout centerLayout = new CenterLayout();
            centerLayout.setExtraStyle("centered.DialogLogin");
            setLayout(centerLayout);
            
            FlexTable flexTable = new FlexTable();
            add(flexTable);
            flexTable.setSize("321px", "110px");
            
            final TextField cajaUse = new TextField();
            cajaUse.setMinLength(4);
            cajaUse.getMessages().setMinLengthText("Debe Ser Mayor de 3 Caracter");
            
            lblfldUsername = new LabelField("Nombre de Usuario:");
            flexTable.setWidget(0, 0, lblfldUsername);
            lblfldUsername.setSize("150", "22");
            cajaUse.setEmptyText("Usuario");
            flexTable.setWidget(0, 2, cajaUse);
            
            final TextField cajaPas = new TextField();
            cajaPas.setMinLength(5);
            cajaPas.getMessages().setMinLengthText("Debe Ser Mayor de 5 Caracteres");
            
            lblfldPassword = new LabelField("Contrase\u00F1a:");
            flexTable.setWidget(1, 0, lblfldPassword);
            cajaPas.setPassword(true);
            flexTable.setWidget(1, 2, cajaPas);
            
            CheckBox checkBox = new CheckBox();
            flexTable.setWidget(2, 1, checkBox);
            checkBox.setSize("17px", "16px");
            checkBox.setBoxLabel("");
            checkBox.setHideLabel(true);
            
            Text txtRecordarEnEste = new Text("Recordar En Este PC");
            flexTable.setWidget(2, 2, txtRecordarEnEste);
            flexTable.getCellFormatter().setHorizontalAlignment(2, 1, HasHorizontalAlignment.ALIGN_CENTER);
            flexTable.getRowFormatter().setVerticalAlign(2, HasVerticalAlignment.ALIGN_MIDDLE);
            flexTable.getCellFormatter().setHorizontalAlignment(0, 2, HasHorizontalAlignment.ALIGN_CENTER);
            flexTable.getCellFormatter().setVerticalAlignment(0, 2, HasVerticalAlignment.ALIGN_MIDDLE);
            flexTable.getCellFormatter().setHorizontalAlignment(3, 2, HasHorizontalAlignment.ALIGN_CENTER);
            flexTable.getCellFormatter().setVerticalAlignment(3, 2, HasVerticalAlignment.ALIGN_MIDDLE);
            flexTable.getCellFormatter().setHorizontalAlignment(0, 1, HasHorizontalAlignment.ALIGN_CENTER);
            flexTable.getCellFormatter().setHorizontalAlignment(1, 1, HasHorizontalAlignment.ALIGN_CENTER);
            flexTable.getCellFormatter().setHorizontalAlignment(3, 1, HasHorizontalAlignment.ALIGN_CENTER);
            flexTable.getCellFormatter().setHorizontalAlignment(3, 0, HasHorizontalAlignment.ALIGN_CENTER);
            flexTable.getCellFormatter().setVerticalAlignment(1, 2, HasVerticalAlignment.ALIGN_MIDDLE);
            flexTable.getCellFormatter().setHorizontalAlignment(1, 2, HasHorizontalAlignment.ALIGN_CENTER);
            flexTable.getCellFormatter().setVerticalAlignment(0, 0, HasVerticalAlignment.ALIGN_MIDDLE);
            flexTable.getCellFormatter().setHorizontalAlignment(0, 0, HasHorizontalAlignment.ALIGN_CENTER);
            flexTable.getCellFormatter().setVerticalAlignment(1, 0, HasVerticalAlignment.ALIGN_MIDDLE);
            flexTable.getCellFormatter().setHorizontalAlignment(1, 0, HasHorizontalAlignment.ALIGN_CENTER);
            
            final Button btnReset = new Button("Reset");
            btnReset.addListener(Events.Select, new Listener<ButtonEvent>() {
                public void handleEvent(ButtonEvent e) {
                    cajaUse.clear();
                    cajaPas.clear();
                }
            });
            flexTable.setWidget(3, 0, btnReset);
            btnReset.setSize("93px", "null");
            
            Button btnIngresa = new Button("Ingresa");
            btnIngresa.setWidth("93px");
            btnIngresa.addListener(Events.Select, new Listener<ButtonEvent>() {
                public void handleEvent(ButtonEvent e) {
                    cajaUse.selectAll();
                    cajaPas.selectAll();
                    
                    if((cajaUse.getSelectionLength()==0) && (cajaPas.getSelectionLength()==0)) {
                        MessageBox.alert("Error", "Inserte Username & Password!", null);
                    }
                    else if (cajaUse.getSelectionLength()==0) {
                        MessageBox.alert("Error", "Inserte Username", null);
                    }
                    else if (cajaPas.getSelectionLength()==0){
                        MessageBox.alert("Error", "Inserte Password!", null);
                    }
                    else if (!(cajaUse.getSelectionLength()>=1 && cajaUse.getSelectionLength()<4) 
                            && !(cajaPas.getSelectionLength()>=1 && cajaPas.getSelectionLength()<5)){
                        final MessageBox menAct = MessageBox.progress("Espere...", "Estamos Comprobando Acceso, Espere Un Momento...", "Cargando...");
                        final ProgressBar barraAct = menAct.getProgressBar();
                        barraAct.setStyleName("ProgressBar");
                        Timer t = new Timer() {
                            float i;
                            @Override
                            public void run() {
                                 barraAct.updateProgress(i / 100, (int) i + "% Completado");
                                 i += 5;
                                 if (i > 100) {
                                     cancel();
                                     menAct.close();
                                     MessageBox.info("Bienvenido!", "Ingreso Correcto!", null); 
                                 }
                               
                            }
                        };
                        t.scheduleRepeating(300);
                    }
                    
                }    
            });
            flexTable.setWidget(3, 2, btnIngresa);
            btnIngresa.setWidth("93px");
            btnIngresa.setWidth("93px");
        }
        
    
    
    }
    any help is welcome! regards!

    (sorry for my english )

  2. #2
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