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Add resources for ch 16 + new solutions for chap 16
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‎ch_16/Exercise16_12.java‎

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package ch_16;
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import javafx.application.Application;
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import javafx.geometry.Pos;
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import javafx.scene.Scene;
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import javafx.scene.control.CheckBox;
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import javafx.scene.control.ScrollPane;
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import javafx.scene.control.TextArea;
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import javafx.scene.layout.BorderPane;
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import javafx.scene.layout.HBox;
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import javafx.stage.Stage;
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/**
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* *16.12 (Demonstrate TextArea properties) Write a program that demonstrates the
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* properties of a text area. The program uses a checkbox to indicate whether the
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* text is wrapped onto next line, as shown in Figure 16.41a.
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*/
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public class Exercise16_12 extends Application {
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private final double PANE_WIDTH = 600;
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private final double PANE_HEIGHT = 250;
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@Override
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public void start(Stage primaryStage) {
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BorderPane pane = new BorderPane();
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TextArea ta = new TextArea();
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pane.setCenter(new ScrollPane(ta));
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HBox hBox = new HBox(10);
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CheckBox editableCheckBox = new CheckBox("Editable");
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editableCheckBox.setSelected(true);
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ta.setEditable(true);
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CheckBox wrapCheckBox = new CheckBox("Wrap");
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hBox.getChildren().addAll(editableCheckBox, wrapCheckBox);
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wrapCheckBox.setSelected(true);
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ta.setWrapText(true);
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hBox.setAlignment(Pos.CENTER);
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pane.setBottom(hBox);
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Scene scene = new Scene(pane, PANE_WIDTH, PANE_HEIGHT);
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primaryStage.setTitle(getClass().getName());
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primaryStage.setScene(scene);
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primaryStage.show();
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editableCheckBox.setOnAction(e -> {
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ta.setEditable(editableCheckBox.isSelected());
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});
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wrapCheckBox.setOnAction(e -> {
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ta.setWrapText(wrapCheckBox.isSelected());
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});
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}
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}

‎ch_16/Exercise16_14.java‎

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package ch_16;
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import java.util.List;
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import javafx.application.Application;
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import javafx.geometry.Pos;
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import javafx.scene.Scene;
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import javafx.scene.control.CheckBox;
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import javafx.scene.control.ComboBox;
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import javafx.scene.control.Label;
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import javafx.scene.layout.BorderPane;
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import javafx.scene.layout.HBox;
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import javafx.scene.text.Font;
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import javafx.scene.text.FontPosture;
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import javafx.scene.text.FontWeight;
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import javafx.stage.Stage;
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/**
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* **16.14 (Select a font) Write a program that can dynamically change the font of a text
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* in a label displayed on a stack pane. The text can be displayed in bold and
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* italic at the same time. You can select the font name or font size from combo
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* boxes, as shown in Figure 16.42a. The available font names can be obtained
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* using Font.getFamilies(). The combo box for the font size is initialized
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* with numbers from 1 to 100.
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*/
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public class Exercise16_14 extends Application {
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private double paneWidth = 680;
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private double paneHeight = 250;
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private Label label = new Label("Programming is fun");
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private ComboBox<String> cboFontName = new ComboBox<>();
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private ComboBox<Integer> cboFontSize = new ComboBox<>();
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private CheckBox chkBold = new CheckBox("Bold");
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private CheckBox chkItalic = new CheckBox("Italic");
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@Override
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public void start(Stage primaryStage) {
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BorderPane pane = new BorderPane();
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pane.setCenter(label);
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List<String> fontNames = Font.getFontNames();
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cboFontName.getItems().addAll(fontNames);
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cboFontName.setValue(fontNames.get(0));
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for (int i = 1; i <= 100; i++) {
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cboFontSize.getItems().add(i);
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}
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cboFontSize.setValue(20);
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HBox hBox = new HBox(10);
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hBox.getChildren().addAll(new Label("Font Name"),
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cboFontName, new Label("Font Size"), cboFontSize);
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hBox.setAlignment(Pos.CENTER);
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pane.setTop(hBox);
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HBox hBox2 = new HBox(10);
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hBox2.getChildren().addAll(chkBold, chkItalic);
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hBox2.setAlignment(Pos.CENTER);
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pane.setBottom(hBox2);
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Scene scene = new Scene(pane, paneWidth, paneHeight);
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primaryStage.setTitle(getClass().getName());
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primaryStage.setScene(scene);
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primaryStage.show();
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cboFontName.setOnAction(e -> {
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setFont();
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});
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cboFontSize.setOnAction(e -> {
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setFont();
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});
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chkBold.setOnAction(e -> {
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setFont();
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});
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chkItalic.setOnAction(e -> {
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setFont();
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});
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}
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private void setFont() {
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FontWeight weight;
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if (chkBold.isSelected()) {
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weight = FontWeight.BOLD;
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} else {
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weight = FontWeight.NORMAL;
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}
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FontPosture posture;
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if (chkItalic.isSelected()) {
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posture = FontPosture.ITALIC;
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} else {
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posture = FontPosture.REGULAR;
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}
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label.setFont(Font.font(cboFontName.getValue(), weight, posture,
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cboFontSize.getValue()));
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}
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}

‎ch_16/Exercise16_16.java‎

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package ch_16;
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import javafx.application.Application;
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import javafx.geometry.Pos;
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import javafx.scene.Scene;
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import javafx.scene.control.ComboBox;
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import javafx.scene.control.Label;
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import javafx.scene.control.ListView;
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import javafx.scene.control.ScrollPane;
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import javafx.scene.control.SelectionMode;
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import javafx.scene.layout.BorderPane;
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import javafx.scene.layout.HBox;
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import javafx.stage.Stage;
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/**
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* 16.16 (Use ComboBox and ListView) Write a program that demonstrates selecting
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* items in a list. The program uses a combo box to specify a selection mode, as
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* shown in Figure 16.43a. When you select items, they are displayed in a label
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* below the list.
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*/
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public class Exercise16_16 extends Application {
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private final double PANE_WIDTH = 280;
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private final double PANE_HEIGHT = 250;
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private Label label = new Label("No items selected");
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private ComboBox<String> cboSelectionMode = new ComboBox<>();
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private ListView<String> lv = new ListView();
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@Override
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public void start(Stage primaryStage) {
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BorderPane pane = new BorderPane();
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lv.getItems().addAll("China", "Japan", "Korea", "India",
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"Malaysia", "Vietnam");
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cboSelectionMode.getItems().addAll("SINGLE", "MULTIPLE");
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cboSelectionMode.setValue("SINGLE");
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HBox hBox = new HBox(10);
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hBox.getChildren().addAll(new Label("Choose Selection Mode:"),
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cboSelectionMode);
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hBox.setAlignment(Pos.CENTER);
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pane.setTop(hBox);
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pane.setCenter(new ScrollPane(lv));
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pane.setBottom(label);
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Scene scene = new Scene(pane, PANE_WIDTH, PANE_HEIGHT);
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primaryStage.setTitle(getClass().getName());
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primaryStage.setScene(scene);
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primaryStage.show();
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cboSelectionMode.setOnAction(e -> {
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if (cboSelectionMode.getValue().equals("SINGLE")) {
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lv.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
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} else {
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lv.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
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}
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});
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lv.getSelectionModel().selectedItemProperty().addListener(ov -> {
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StringBuilder items = new StringBuilder();
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for (String s : lv.getSelectionModel().getSelectedItems()) {
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items.append(s).append(" ");
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}
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label.setText("Selected items are " + items);
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});
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}
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}

‎ch_16/Exercise16_18.java‎

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package ch_16;
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import javafx.animation.KeyFrame;
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import javafx.animation.Timeline;
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import javafx.application.Application;
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import javafx.geometry.Pos;
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import javafx.scene.Scene;
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import javafx.scene.control.Button;
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import javafx.scene.control.Slider;
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import javafx.scene.layout.BorderPane;
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import javafx.scene.layout.HBox;
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import javafx.scene.layout.Pane;
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import javafx.scene.paint.Color;
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import javafx.scene.shape.Arc;
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import javafx.scene.shape.ArcType;
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import javafx.scene.shape.Circle;
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import javafx.stage.Stage;
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import javafx.util.Duration;
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/**
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* **16.18 (Simulation: a running fan) Rewrite Programming Exercise 15.28 to add a slider
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* to control the speed of the fan, as shown in Figure 16.43c.
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*/
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public class Exercise16_18 extends Application {
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@Override
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public void start(Stage primaryStage) {
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CustomFanPane fan = new CustomFanPane();
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HBox hBox = new HBox(8);
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Button btPause = new Button("Pause");
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Button btResume = new Button("Resume");
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Button btReverse = new Button("Reverse");
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hBox.setAlignment(Pos.CENTER);
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hBox.getChildren().addAll(btPause, btResume, btReverse);
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BorderPane pane = new BorderPane();
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pane.setCenter(fan);
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pane.setTop(hBox);
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Slider slSpeed = new Slider();
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slSpeed.setValue(10);
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pane.setBottom(slSpeed);
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Scene scene = new Scene(pane, 260, 260);
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primaryStage.setTitle(getClass().getName());
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primaryStage.setScene(scene);
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primaryStage.show();
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Timeline animation = new Timeline(
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new KeyFrame(Duration.millis(100), e -> fan.move()));
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animation.setCycleCount(Timeline.INDEFINITE);
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animation.play();
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scene.widthProperty().addListener(e -> fan.setW(fan.getWidth()));
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scene.heightProperty().addListener(e -> fan.setH(fan.getHeight()));
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btPause.setOnAction(e -> animation.pause());
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btResume.setOnAction(e -> animation.play());
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btReverse.setOnAction(e -> fan.reverse());
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slSpeed.setMax(20);
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animation.rateProperty().bind(slSpeed.valueProperty());
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}
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static class CustomFanPane extends Pane {
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private double w = 200;
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private double h = 200;
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private double radius = Math.min(w, h) * 0.45;
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private Arc arc[] = new Arc[4];
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private double startAngle = 30;
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private Circle circle = new Circle(w / 2, h / 2, radius);
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public CustomFanPane() {
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circle.setStroke(Color.BLACK);
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circle.setFill(Color.WHITE);
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getChildren().add(circle);
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for (int i = 0; i < 4; i++) {
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arc[i] = new Arc(w / 2, h / 2, radius * 0.9,
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radius * 0.9, startAngle + i * 90, 35);
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arc[i].setFill(Color.RED);
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arc[i].setType(ArcType.ROUND);
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getChildren().addAll(arc[i]);
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}
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}
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private double increment = 5;
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public void reverse() {
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increment = -increment;
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}
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public void move() {
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setStartAngle(startAngle + increment);
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}
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public void setStartAngle(double angle) {
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startAngle = angle;
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setValues();
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}
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public void setValues() {
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radius = Math.min(w, h) * 0.45;
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circle.setRadius(radius);
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circle.setCenterX(w / 2);
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circle.setCenterY(h / 2);
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for (int i = 0; i < 4; i++) {
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arc[i].setRadiusX(radius * 0.9);
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arc[i].setRadiusY(radius * 0.9);
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arc[i].setCenterX(w / 2);
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arc[i].setCenterY(h / 2);
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arc[i].setStartAngle(startAngle + i * 90);
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}
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}
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public void setW(double w) {
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this.w = w;
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setValues();
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}
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public void setH(double h) {
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this.h = h;
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setValues();
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}
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}
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}
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