Lab03

.gitignore

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+/.idea
+*/.idea
+*/out

lab-03/src/by/waitingsolong/paint/PaintApplication.java

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+package by.waitingsolong.paint;
+
+import javafx.application.Application;
+import javafx.embed.swing.SwingFXUtils;
+import javafx.scene.Scene;
+import javafx.scene.canvas.Canvas;
+import javafx.scene.canvas.GraphicsContext;
+import javafx.scene.control.*;
+import javafx.scene.image.Image;
+import javafx.scene.image.WritableImage;
+import javafx.scene.layout.VBox;
+import javafx.scene.layout.BorderPane;
+import javafx.stage.FileChooser;
+import javafx.stage.Stage;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.awt.image.RenderedImage;
+import java.io.*;
+
+public class PaintApplication extends Application {
+
+    private GraphicsContext graphicsContext;
+    private ColorPicker colorPicker;
+    private Slider brushSize;
+    private ToggleGroup shapeGroup;
+    private FileChooser fileChooser;
+
+    @Override
+    public void start(Stage primaryStage) {
+        Canvas canvas = new Canvas(800, 600);
+        graphicsContext = canvas.getGraphicsContext2D();
+
+        colorPicker = new ColorPicker();
+        colorPicker.setMinHeight(30);
+        brushSize = new Slider(0.1, 50, 10);
+
+        RadioButton[] buttons = {
+                new RadioButton("Brush"),
+                new RadioButton("Circle"),
+                new RadioButton("Rectangle"),
+                new RadioButton("Line")
+        };
+
+        shapeGroup = new ToggleGroup();
+        for (RadioButton button : buttons) {
+            button.setToggleGroup(shapeGroup);
+        }
+
+        buttons[0].setSelected(true);
+
+        fileChooser = new FileChooser();
+        fileChooser.getExtensionFilters().addAll(
+                new FileChooser.ExtensionFilter("PNG", "*.png"),
+                new FileChooser.ExtensionFilter("JPG", "*.jpg")
+        );
+
+        Button saveButton = new Button("Save");
+        saveButton.setOnAction(e -> saveToFile(canvas, fileChooser.showSaveDialog(primaryStage)));
+
+        Button openButton = new Button("Open");
+        openButton.setOnAction(e -> openFromFile(fileChooser.showOpenDialog(primaryStage)));
+
+        VBox leftLayout = new VBox();
+        leftLayout.getChildren().addAll(colorPicker, brushSize);
+        leftLayout.getChildren().addAll(buttons);
+        leftLayout.getChildren().addAll(saveButton, openButton);
+
+        BorderPane layout = new BorderPane();
+        layout.setLeft(leftLayout);
+        layout.setCenter(canvas);
+
+        double[] start = new double[2];
+
+        canvas.setOnMouseDragged(e -> {
+            double endX = e.getX();
+            double endY = e.getY();
+
+            graphicsContext.setStroke(colorPicker.getValue());
+            graphicsContext.setLineWidth(brushSize.getValue());
+
+            RadioButton selectedButton = (RadioButton) shapeGroup.getSelectedToggle();
+            if (selectedButton.getText().equals("Brush")) {
+                double radius = brushSize.getValue() / 2;
+                double distance = Math.sqrt(Math.pow(endX - start[0], 2) + Math.pow(endY - start[1], 2));
+                double angle = Math.atan2(endY - start[1], endX - start[0]);
+                for (double i = 0; i < distance; i += radius * 2) {
+                    double x = start[0] + Math.cos(angle) * i;
+                    double y = start[1] + Math.sin(angle) * i;
+                    graphicsContext.strokeOval(x - radius, y - radius, radius * 2, radius * 2);
+                }
+                start[0] = endX;
+                start[1] = endY;
+            }
+        });
+
+        canvas.setOnMousePressed(e -> {
+            start[0] = e.getX();
+            start[1] = e.getY();
+        });
+
+        canvas.setOnMouseReleased(e -> {
+            double endX = e.getX();
+            double endY = e.getY();
+
+            graphicsContext.setStroke(colorPicker.getValue());
+            graphicsContext.setLineWidth(brushSize.getValue());
+
+            RadioButton selectedButton = (RadioButton) shapeGroup.getSelectedToggle();
+            switch (selectedButton.getText()) {
+                case "Circle" -> graphicsContext.strokeOval(start[0], start[1], endX - start[0], endY - start[1]);
+                case "Rectangle" -> graphicsContext.strokeRect(start[0], start[1], endX - start[0], endY - start[1]);
+                case "Line" -> graphicsContext.strokeLine(start[0], start[1], endX, endY);
+            }
+        });
+
+        canvas.setStyle("-fx-background-color: #ffffff;");
+        leftLayout.setStyle("-fx-background-color: #f4d6ff;");
+
+        primaryStage.setScene(new Scene(layout));
+        primaryStage.setTitle(".");
+        primaryStage.show();
+    }
+
+
+    private void saveToFile(Canvas canvas, File file) {
+        if (file != null) {
+            try {
+                WritableImage writableImage = new WritableImage((int) canvas.getWidth(), (int) canvas.getHeight());
+                canvas.snapshot(null, writableImage);
+                RenderedImage renderedImage = SwingFXUtils.fromFXImage(writableImage, null);
+                ImageIO.write(renderedImage, "png", file);
+            } catch (IOException ex) {
+                System.out.println(ex.getMessage());
+            }
+        }
+    }
+
+    private void openFromFile(File file) {
+        if (file != null) {
+            try {
+                BufferedImage bufferedImage = ImageIO.read(file);
+                Image image = SwingFXUtils.toFXImage(bufferedImage, null);
+                graphicsContext.drawImage(image, 0, 0);
+            } catch (IOException ex) {
+                System.out.println(ex.getMessage());
+            }
+        }
+    }
+
+    public static void main(String[] args) {
+        launch(args);
+    }
+}