Cadastro de produtos no Java com interface

package cadastro;

/**

 *

 * @author Aluno

 */

import javafx.animation.FadeTransition;

import javafx.application.Application;

import javafx.collections.FXCollections;

import javafx.collections.ObservableList;

import javafx.event.ActionEvent;

import javafx.event.Event;

import javafx.event.EventHandler;

import javafx.geometry.Insets;

import javafx.geometry.Pos;

import javafx.scene.Scene;

import javafx.scene.control.*;

import javafx.scene.control.cell.ChoiceBoxTableCell;

import javafx.scene.control.cell.PropertyValueFactory;

import javafx.scene.control.cell.TextFieldTableCell;

import javafx.scene.image.Image;

import javafx.scene.image.ImageView;

import javafx.scene.input.*;

import javafx.scene.layout.BorderPane;

import javafx.scene.layout.GridPane;

import javafx.scene.layout.HBox;

import javafx.scene.paint.Color;

import javafx.stage.FileChooser;

import javafx.stage.Stage;

import javafx.util.Duration;

import java.io.File;

import java.math.BigDecimal;

import java.util.Optional;

import java.util.regex.Pattern;

import javafx.scene.control.Alert.AlertType;

import javafx.scene.control.TableColumn.CellEditEvent;

import javafx.stage.FileChooser.ExtensionFilter;

public class TabForm extends Application {

 BorderPane bdp;

 //Área Superior do BorderPane

 Label lblOption, lblKeyword;

 TextField txtKeyword;

 ChoiceBox chbOption; //para escolher por qual campo pesquisar

 HBox pnlSearch;

 FadeTransition ft; //para animar os componentes de busca

 //Área Central do BorderPane

 TabPane tbp; //componente de abas

 Tab tabSearch, tabEdit; //aba de busca e aba de edição

 //Conteúdo da aba de busca

 TableView tbl;

 ContextMenu ctxMenu; //permite ativar menu com botão direito

 MenuItem mnuEdit, mnuDelete; //3 opções de menu do botão direito

 //Conteúdo da Aba de Edição

 GridPane gridEdit; //o formulário será organizado em um Grid (matriz)

 Label lblName, lblQtty, lblPrice, lblType, lblQttyError;

 TextField txtName, txtQtty, txtPrice;

 ChoiceBox chbType;

 final FileChooser fc = new FileChooser(); //para escolher o arquivo da imagem

 Button btnSelectPicture;

 final ImageView imgProduct = new ImageView(); //para exibir a imagem escolhida

 //Área Inferior do BorderPane

 HBox pnlBottom;

 Button btnNew, btnConfirm, btnEdit, btnCancel, btnDelete;

 @SuppressWarnings("unchecked")

 @Override

 public void start(Stage primaryStage) {

   primaryStage.setTitle("Tab Form");

   bdp = new BorderPane();

   Scene scene = new Scene(bdp, 500, 400);

   //Construindo a área superior

   lblKeyword = new Label("Keyword:");

   lblKeyword.setOpacity(0);

   txtKeyword = new TextField();

   txtKeyword.setOpacity(0);

   txtKeyword.setTooltip(new Tooltip("Press ENTER to Search!")); //dica

   txtKeyword.setPromptText("Type what to search here");

   txtKeyword.setPrefColumnCount(13);

   txtKeyword.setStyle(Style.BUTTON);

   txtKeyword.setOnKeyPressed(e -> { txtKeyword_onKeyPressed(e); });

   lblOption= new Label("Option:");

   lblOption.setOpacity(0);

   chbOption = new ChoiceBox();

   chbOption.setOpacity(0);

   chbOption.setOnAction(e -> { chbOption_onAction((ActionEvent) e); });

   chbOption.getItems().addAll("Name", "Type");

   chbOption.getSelectionModel().selectFirst();

   pnlSearch = new HBox(5); //Espaço de 5 px

   pnlSearch.setAlignment(Pos.CENTER);

   pnlSearch.getChildren().addAll(lblKeyword, txtKeyword, lblOption, chbOption);

   pnlSearch.setPadding(new Insets(5));

   ft = new FadeTransition(Duration.millis(700));

   ft.setFromValue(0.0);

   ft.setToValue(1.0);

   ft.setNode(lblKeyword);

   ft.setOnFinished(e->{ ft_onFinished(e); });   

   //Construindo a área inferior

   btnNew = new Button("New");

   btnNew.setStyle(Style.BUTTON);

   btnNew.setOnAction(e -> { btnNew_onAction(e); });

   btnConfirm = new Button("Confirm");

   btnConfirm.setStyle(Style.BUTTON);

   btnConfirm.setOnAction(e -> { btnConfirm_onAction(e); });

   btnEdit = new Button("Edit");

   btnEdit.setTooltip(new Tooltip("Shortcut: CMD+E"));

   btnEdit.setStyle(Style.BUTTON);

   btnEdit.setOnAction(e -> { btnEdit_onAction(e); });

   btnCancel = new Button("Cancel");

   btnCancel.setStyle(Style.BUTTON);

   btnCancel.setOnAction(e -> { btnCancel_onAction(e); });

   btnDelete = new Button("Delete");

   btnDelete.setTooltip(new Tooltip("Shortcut: CMD+D"));

   btnDelete.setStyle(Style.BUTTON);

   btnDelete.setOnAction(e -> { btnDelete_onAction(e); });        

   //Tecla de atalho para realizar busca (CTRL + S)

   scene.getAccelerators().put(

     new KeyCodeCombination(KeyCode.S, KeyCombination.SHORTCUT_DOWN), 

       new Runnable() {

         @Override public void run() {

           txtKeyword.requestFocus();

         }

       }

   );

   //Tecla de atalho para seleção da tabela (CTRL + T)

   scene.getAccelerators().put(

   new KeyCodeCombination(KeyCode.T, KeyCombination.SHORTCUT_DOWN), 

     new Runnable() {

       @Override public void run() {

         tbl.requestFocus();

       }

     }

   );

   //Tecla de atalho para exclusão (CTRL + D)

   scene.getAccelerators().put(

     new KeyCodeCombination(KeyCode.D, KeyCombination.SHORTCUT_DOWN), 

       new Runnable() {

         @Override public void run() {

           btnDelete.fire();

         }

       }

   );

   //Tecla de atalho para edição (CTRL + E)

   scene.getAccelerators().put(

     new KeyCodeCombination(KeyCode.E, KeyCombination.SHORTCUT_DOWN), 

       new Runnable() {

         @Override public void run() {

           btnEdit.fire();

         }

       }

   );

   //botões da parte inferior da interface

   pnlBottom = new HBox(5);

   pnlBottom.setAlignment(Pos.CENTER);

   pnlBottom.getChildren().addAll(btnNew, btnConfirm, btnEdit, btnCancel, btnDelete);

   pnlBottom.setPadding(new Insets(5));

   //Construindo a Aba Busca

   //Lista de produtos que serão exibidos na tabela

   final ObservableList produtos = FXCollections.observableArrayList(

     new Product("Wine",ProductType.BEVERAGE,new BigDecimal(40),10),

     new Product("Soap",ProductType.CLEAN,new BigDecimal(8),5),

     new Product("Cristal Clean",ProductType.CLEAN,new BigDecimal(5),25),

     new Product("Soda",ProductType.BEVERAGE,new BigDecimal(3),43)

   );

   //Configurando a coluna nome do produto

   TableColumn tbcName = new TableColumn<>("Name");

   tbcName.setCellValueFactory(new PropertyValueFactory("name"));

   //permitindo que as células da coluna nome sejam editáveis

   tbcName.setCellFactory(TextFieldTableCell.forTableColumn());

   tbcName.setOnEditCommit(

     new EventHandler<CellEditEvent<Product, String>>() {

       @Override

       public void handle(CellEditEvent<Product, String> t) {

         ((Product) t.getTableView().getItems().get(

           t.getTablePosition().getRow())

         ).setName(t.getNewValue());

       }

     }

   );        

   //Configurando a coluna tipo do produto

   TableColumn tbcType = new TableColumn<>("Type");

   tbcType.setCellValueFactory(new PropertyValueFactory("type"));

   //permitindo que as células da coluna tipo sejam editáveis

 tbcType.setCellFactory(ChoiceBoxTableCell.forTableColumn(ProductType.values()));

   tbcType.setOnEditCommit(new EventHandler<TableColumn.CellEditEvent<Product,ProductType>>() {

     @Override

     public void handle(CellEditEvent<Product, ProductType> t) {

       ((Product) t.getTableView().getItems().get(

         t.getTablePosition().getRow())

       ).setType(t.getNewValue());    

     }

   });                

   //Configurando a coluna preço do produto

   TableColumn tbcPrice = new TableColumn<>("Price");

   tbcPrice.setCellValueFactory(new PropertyValueFactory("price"));

   //Configurando a coluna qtde do produto

   TableColumn tbcQtty = new TableColumn<>("Qtty");

   tbcQtty.setCellValueFactory(new PropertyValueFactory("qtty"));

   //Configurando a coluna para mostrar a imagem do produto

   TableColumn tbcImg = new TableColumn<>("Image");

   tbcImg.setCellValueFactory(new PropertyValueFactory("img"));

   //Criando a tabela

   tbl = new TableView();

   //Definindo uma dica sobre a possibilidade de usar o botão direito do mouse

   tbl.setTooltip(new Tooltip("Press the right button of the mouse for more options!"));

   tbl.setPrefHeight(300);

   tbl.setItems(produtos); //de onde obterá a lista de produtos

   //adicionando as colunas previamente configuradas

   tbl.getColumns().addAll(tbcName, tbcType, tbcPrice, tbcQtty, tbcImg);

   //não permite o redimensionamento das colunas pelo usuário

   tbl.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);

   //Estilo visual da tabela

   tbl.setStyle(Style.TABLE);

   tbl.setOnMouseClicked(e -> { tbl_onMouseClicked(e); });

   tbl.setOnKeyPressed(e -> { tbl_onKeyPressed(e); });

   tbl.setEditable(true); //tabela permite edição

   //Configurando o menu do botão direito do mouse sobre a tabela

   ctxMenu = new ContextMenu();

   mnuEdit = new MenuItem("Edit");

   mnuEdit.setOnAction(e -> { mnuEdit_onAction(e); });

   mnuDelete = new MenuItem("Delete");

   mnuDelete.setOnAction(e -> { mnuDelete_onAction(e); });

   ctxMenu.getItems().addAll(mnuEdit, mnuDelete);

   tbl.setContextMenu(ctxMenu);        

   //Construindo a aba de edição

   lblName = new Label("Name:");

   lblName.setMinWidth(70);

   lblType = new Label("Type:");

   lblQtty = new Label("Qtty:");

   lblQttyError = new Label("");lblQttyError.setTextFill(Color.RED);

   lblQttyError.setStyle("-fx-font-size: 11px;");

   lblPrice = new Label("Price:");

   txtName = new TextField();

   txtName.setPromptText("Product description");

   txtName.setMinWidth(200);

   txtName.setPrefWidth(300);

   chbType = new ChoiceBox<>();

   for (ProductType pt : ProductType.values())

     chbType.getItems().add(pt);

   txtQtty = new TextField();

   txtQtty.setMinWidth(30);

   txtQtty.setPrefWidth(50);

   txtQtty.setMaxWidth(70);

   txtPrice = new TextField();

   txtPrice.setMinWidth(30);

   txtPrice.setPrefWidth(50);

   txtPrice.setMaxWidth(100);

   btnSelectPicture = new Button("Select Picture");

   btnSelectPicture.setOnAction(e -> {

     btnSelect_onPicture(e, primaryStage);

   });

   //Configurando o componente de seleção de imagem

   fc.setTitle("Select Product Image");

   //Somente serão aceitas extensões PNG, JPG e GIF

   fc.getExtensionFilters().addAll(

     new ExtensionFilter("Image Files", "*.png", "*.jpg", "*.gif")

   );

   imgProduct.setFitWidth(100);

   imgProduct.setFitHeight(100);

   imgProduct.setPreserveRatio(true); //deve preservar a proporção da imagem

   //Configurando a matriz aonde ficarão os elementos da aba edição

   gridEdit = new GridPane();

   gridEdit.setAlignment(Pos.CENTER);

   gridEdit.setHgap(10); gridEdit.setVgap(10);     

   gridEdit.setPadding(new Insets(25, 25, 25, 25));

   gridEdit.add(lblName, 0, 0); //coluna 0, linha 0

   gridEdit.add(txtName, 1, 0); //coluna 1, linha 0

   gridEdit.add(lblType, 0, 1); //coluna 0, linha 1

   gridEdit.add(chbType, 1, 1); //coluna 1, linha 1

   gridEdit.add(lblQtty, 0, 2); //...

   gridEdit.add(txtQtty, 1, 2);

   gridEdit.add(lblQttyError, 2, 2);

   gridEdit.add(lblPrice, 0, 3);

   gridEdit.add(txtPrice, 1, 3);

   gridEdit.add(btnSelectPicture, 0, 4);

   gridEdit.add(imgProduct, 1, 4);

   //Juntando tudo

   tabSearch = new Tab("Products");

   tabSearch.setOnSelectionChanged(e -> {tabSearch_onSelectionChange(e); });

   tabSearch.setClosable(false);  //aba não permite ser fechada

   tabSearch.setContent(tbl); //conteúdo dessa aba é uma tabela

   tabEdit = new Tab("Edit");

   tabEdit.setOnSelectionChanged(e -> {tabEdit_onSelectionChange(e); });

   tabEdit.setClosable(false); //aba não permite ser fechada

   tabEdit.setContent(gridEdit); //conteúdo dessa aba é um painel

   tbp = new TabPane();

   tbp.getTabs().addAll(tabSearch, tabEdit); //somente duas abas

   bdp.setTop(pnlSearch); //no topo da interface o painel de busca

   bdp.setCenter(tbp);    //no centro o painel com 2 abas

   bdp.setBottom(pnlBottom); //na parte inferior o painel com os botões

   primaryStage.setScene(scene);

   primaryStage.show();

   tbl.requestFocus();

   setEditable(false); //formulário não pode ser editado inicialmente

   ft.play(); //fazendo aparecer gradualmente os componentes de busca

 }

 private void btnSelect_onPicture(ActionEvent e, Stage stage) {

   File f = fc.showOpenDialog(stage);

   if (f != null){

     imgProduct.setImage(new Image(f.toURI().toString()));

   }

 }

 

 //se pressionar ENTER na tabela é como clicar no botão editar

 private void tbl_onKeyPressed(KeyEvent e) {

   if (e.getCode()==KeyCode.ENTER)

     btnEdit.fire();

 }

 //algoritmo da animação do painel de busca (parte superior)

 private void ft_onFinished(ActionEvent e) {

   if (ft.getNode()==lblKeyword) {

     ft.setNode(txtKeyword);

     ft.play();

   }else if (ft.getNode()==txtKeyword) {

     ft.setNode(lblOption);

     ft.play();

   }else if (ft.getNode()==lblOption) {

     ft.setNode(chbOption);

     ft.play();

   }else if(ft.getNode()==chbOption){

     txtKeyword.requestFocus();

   }

 }

 //Verifica se a aba pode ser mudada (em edição não pode)

 private void tabSearch_onSelectionChange(Event e) {

   if (tabSearch.isSelected() && btnNew.isDisabled()) {

     tbp.getSelectionModel().select(tabEdit);

     Alert alert = new Alert(AlertType.INFORMATION);

     alert.setTitle("Information Dialog");

     alert.setHeaderText("Search not Allowed!");

     alert.setContentText("You are editing a register. You have to CONFIRM or CANCEL your operation.");

     alert.showAndWait();

   }

 }

 //quando muda para a aba de edição os campos são preenchidos

 private void tabEdit_onSelectionChange(Event e) {

   if (tabEdit.isSelected()) {

     fillForm();

   }

 }

 

 //Se der um duplo clique na tabela vai para a aba de edição

 private void tbl_onMouseClicked(MouseEvent e) {

   if (e.getClickCount()>=2) {

     tbp.getSelectionModel().select(1);

   }

 }

 private void mnuDelete_onAction(ActionEvent e) {

   btnDelete_onAction(e);

 }

 private void mnuEdit_onAction(ActionEvent e) {

   btnEdit_onAction(e);

 }

 //Se mudar o choice da busca vai para a aba de busca

 private void chbOption_onAction(ActionEvent e) {

   if (tbp!=null) tbp.getSelectionModel().select(0);

 }

 //Se pressionar ENTER na caixa de texto de busca vai para a aba de busca

 private void txtKeyword_onKeyPressed(KeyEvent e) {

   if (e.getCode() == KeyCode.ENTER) {

     tbp.getSelectionModel().select(0);

   }

 }

 private void btnDelete_onAction(ActionEvent e) {

   Alert alert;

   Product p = (Product) tbl.getSelectionModel().getSelectedItem();

   if (p != null) {

     alert = new Alert(AlertType.CONFIRMATION);

     alert.setTitle("Confirmation Dialog");

     alert.setHeaderText("DELETE Dialog");

     alert.setContentText("Are you sure you want to delete it?");

     Optional result = alert.showAndWait();

     if (result.get() == ButtonType.OK){

       tbl.getItems().remove(p);

       clearForm();

     }

   } else {

     alert = new Alert(AlertType.INFORMATION);

     alert.setTitle("Information Dialog");

     alert.setHeaderText("Product not selected!");

     alert.setContentText("You must select a product in the table in order to delete.");

     alert.showAndWait();   

   }

 }

 private void btnCancel_onAction(ActionEvent e) {

   setEditable(false);

   clearForm();

   fillForm();

 }

 private void btnEdit_onAction(ActionEvent e) {

   Alert alert;

   Product p = (Product) tbl.getSelectionModel().getSelectedItem();

   if (p!=null) {

     setEditable(true);

     tbp.getSelectionModel().select(1);

     txtName.requestFocus();

   } else {

     alert = new Alert(AlertType.INFORMATION);

     alert.setTitle("Information Dialog");

     alert.setHeaderText("Product not selected!");

     alert.setContentText("You must select a product in the table in order to edit it.");

     alert.showAndWait();      

   }

 }

 private void btnConfirm_onAction(ActionEvent e) {

  boolean error = false;

  if (!Pattern.matches("[0-9]*\\.?[0-9]*", txtQtty.getText())){

   txtQtty.setStyle(Style.ERROR);

   lblQttyError.setText("Value must be a number >= 0");

   error=true;

   txtQtty.requestFocus();

  }

  if (!error) {

    Product p = (Product) tbl.getSelectionModel().getSelectedItem();

    if (p == null) {

      p = new Product();

      tbl.getItems().add(p);

    }

    p.setName(txtName.getText());

    p.setPrice(new BigDecimal(txtPrice.getText()));

    p.setQtty(new Float(txtPrice.getText()));

    p.setType((ProductType) chbType.getSelectionModel().getSelectedItem());

    ImageView iv = new ImageView(imgProduct.getImage());

    iv.setFitWidth(100);

    iv.setFitHeight(100);

    iv.setPreserveRatio(true);

    p.setImg(iv);

    clearForm();

    setEditable(false);

    tbl.refresh();

    tbp.getSelectionModel().select(0);

    tbl.requestFocus();

    tbl.getSelectionModel().select(p);

  }

 }

 private void btnNew_onAction(ActionEvent e) {

   setEditable(true);

   tbp.getSelectionModel().select(1);

   clearForm();

   txtName.requestFocus();

   tbl.getSelectionModel().select(null);

 }

 public void setEditable(boolean edit) {

   btnNew.setDisable(edit);

   btnConfirm.setDisable(!edit);

   btnEdit.setDisable(edit);

   btnCancel.setDisable(!edit);

   btnDelete.setDisable(edit);

   gridEdit.setDisable(!edit);

 }

 public void clearForm() {

   txtName.setText("");

   txtQtty.setText("");

   txtPrice.setText("");

   chbType.getSelectionModel().select(-1);

   txtName.setStyle("");

   txtQtty.setStyle("");

   txtPrice.setStyle("");

   //imgProduct.setImage(null); it doesn't work properly

   lblQttyError.setText("");

 }

 public void fillForm() {

  Product p = (Product) tbl.getSelectionModel().getSelectedItem();

  if (p!=null) {

   txtName.setText(p.getName());

   txtQtty.setText(p.getQtty()+"");

   txtPrice.setText(p.getPrice().toString());

   chbType.getSelectionModel().select(p.getType());

   imgProduct.setImage(p.getImg().getImage());

  }

 }

    public static void main(String[] args) {

        Application.launch(args);

    }

 public static class Product {

     private String name;

     private ProductType type;

     private BigDecimal price;

     private float qtty;

     private ImageView img = new ImageView(new Image(getClass().getResourceAsStream("search.png")));

     public Product() {}

     public Product(String name, ProductType type, BigDecimal price, float qtty) {

      this.name = name;

      this.type = type;

      this.price = price;

      this.qtty = qtty;

     }

  public String getName() {

   return name;

  }

  public void setName(String name) {

   this.name = name;

  }

  public ProductType getType() {

   return type;

  }

  public void setType(ProductType type) {

   this.type = type;

  }

  public BigDecimal getPrice() {

   return price;

  }

  public void setPrice(BigDecimal price) {

   this.price = price;

  }

  public float getQtty() {

   return qtty;

  }

  public void setQtty(float qtty) {

   this.qtty = qtty;

  }

  @Override

  public int hashCode() {

   final int prime = 31;

   int result = 1;

   result = prime * result + ((name == null) ? 0 : name.hashCode());

   result = prime * result + ((type == null) ? 0 : type.hashCode());

   return result;

  }

  @Override

  public boolean equals(Object obj) {

   if (this == obj)

    return true;

   if (obj == null)

    return false;

   if (getClass() != obj.getClass())

    return false;

   Product other = (Product) obj;

   if (name == null) {

    if (other.name != null)

     return false;

   } else if (!name.equals(other.name))

    return false;

   if (type != other.type)

    return false;

   return true;

  }

  public String toString() {

      return "Product: " + name;

  }

  public ImageView getImg() {

   return img;

  }

  public void setImg(ImageView img) {

   this.img = img;

  }

}

public static enum ProductType {

  BEVERAGE, CLEAN, FOOD

}

public static class Style {

  public static final String BUTTON = "-fx-background-color: linear-gradient(#ffd65b, #e68400), linear-gradient(#ffef84, #f2ba44), linear-gradient(#ffea6a, #efaa22), linear-gradient(#ffe657 0%, #f8c202 50%, #eea10b 100%), linear-gradient(from 0% 0% to 15% 50%, rgba(255,255,255,0.9), rgba(255,255,255,0)); -fx-background-radius: 10;   -fx-background-insets: 0,1,2,3,0;  -fx-text-fill: #654b00;     -fx-font-weight: bold;     -fx-font-size: 12px;     -fx-padding: 10 10 10 10;";

  public static final String ERROR = "-fx-background-color: red,linear-gradient(to bottom, derive(red,60%) 5%,derive(red,90%) 40%);";

  public static final String TABLE = "-fx-selection-bar: orange; -fx-selection-bar-non-focused: moccasin;";

 }

    

}