feat(newCanvas): possibilité de créer un nouveau canvas de taille spécifiée

graphical-app/src/main/java/fr/emiko/graphicalapp/NewCanvasController.java

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+package fr.emiko.graphicalapp;
+
+import javafx.event.ActionEvent;
+import javafx.fxml.Initializable;
+import javafx.scene.control.Button;
+import javafx.scene.control.TextField;
+import javafx.stage.Stage;
+import net.synedra.validatorfx.Check;
+import net.synedra.validatorfx.Validator;
+
+import java.net.URL;
+import java.util.ResourceBundle;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class NewCanvasController implements Initializable {
+    public TextField heightTextField;
+    public TextField widthTextField;
+    public Button createButton;
+    public Button cancelButton;
+    private double canvasWidth;
+    private double canvasHeight;
+    private boolean ok = false;
+    private Validator validator = new Validator();
+    @Override
+    public void initialize(URL url, ResourceBundle resourceBundle) {
+        createButton.setOnAction(this::create);
+        createButton.disableProperty().bind(validator.containsErrorsProperty());
+        cancelButton.setOnAction(this::close);
+
+        validator.createCheck()
+                .decorates(createButton)
+                .dependsOn("width", heightTextField.textProperty())
+                .dependsOn("height", widthTextField.textProperty())
+                .withMethod(this::checkWidthHeight)
+                .immediate();
+    }
+
+    private void checkWidthHeight(Check.Context context) {
+        Pattern pattern = Pattern.compile("\\d+");
+        Matcher widthMatcher = pattern.matcher(widthTextField.getText());
+        Matcher heightMatcher = pattern.matcher(heightTextField.getText());
+        if (!widthMatcher.matches() || !heightMatcher.matches()) {
+            context.error("Width and height fields must contain only numbers.");
+        }
+    }
+
+    public double getCanvasWidth() {
+        return canvasWidth;
+    }
+
+    public double getCanvasHeight() {
+        return canvasHeight;
+    }
+
+    public boolean isOk() {
+        return ok;
+    }
+
+    private void close(ActionEvent actionEvent) {
+        ((Stage) createButton.getScene().getWindow()).close();
+    }
+
+    private void create(ActionEvent actionEvent) {
+        this.ok = true;
+        this.canvasWidth = Double.parseDouble(widthTextField.getText());
+        this.canvasHeight = Double.parseDouble(heightTextField.getText());
+        ((Stage) createButton.getScene().getWindow()).close();
+    }
+}