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How to convert color from ColorPicker to String value in javaFX


By : Nicolas Ganci
Date : August 02 2020, 02:00 AM
fixed the issue. Will look into that further Converting Color to Hex String
You can use the following to create a hex string from a Color:
code :
private static String toHexString(Color color) {
  int r = ((int) Math.round(color.getRed()     * 255)) << 24;
  int g = ((int) Math.round(color.getGreen()   * 255)) << 16;
  int b = ((int) Math.round(color.getBlue()    * 255)) << 8;
  int a = ((int) Math.round(color.getOpacity() * 255));
  return String.format("#%08X", (r + g + b + a));
}
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.ColorPicker;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class App extends Application {

  @Override
  public void start(Stage primaryStage) {
    StackPane root = new StackPane();

    ColorPicker picker = new ColorPicker();
    root.getChildren().add(picker);
    picker.setOnAction(
        event -> {
          event.consume();

          Color value = picker.getValue();
          if (value == null) {
            root.setStyle(null);
          } else {
            String style = String.format("-fx-background-color: %s;", toHexString(value));
            root.setStyle(style);
          }
        });

    primaryStage.setScene(new Scene(root, 500, 300));
    primaryStage.setTitle("Color to Hexadecimal Example");
    primaryStage.show();
  }

  private static String toHexString(Color color) {
    int r = ((int) Math.round(color.getRed()     * 255)) << 24;
    int g = ((int) Math.round(color.getGreen()   * 255)) << 16;
    int b = ((int) Math.round(color.getBlue()    * 255)) << 8;
    int a = ((int) Math.round(color.getOpacity() * 255));

    return String.format("#%08X", (r + g + b + a));
  }
}
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.ColorPicker;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class App extends Application {

  @Override
  public void start(Stage primaryStage) {
    StackPane root = new StackPane();

    ColorPicker picker = new ColorPicker();
    root.getChildren().add(picker);
    picker.setOnAction(
        event -> {
          event.consume();

          Color value = picker.getValue();
          if (value == null) {
            root.setBackground(null);
          } else {
            root.setBackground(new Background(new BackgroundFill(value, null, null)));
          }
        });

    primaryStage.setScene(new Scene(root, 500, 300));
    primaryStage.setTitle("Programmatically Set Background Color Example");
    primaryStage.show();
  }
}


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How to get hex web String from JavaFX ColorPicker color?


By : Dave McEnnerney
Date : March 29 2020, 07:55 AM
hop of those help? I have Color chosen in JavaFX ColorPicker. Now I need to save it as hex string. I found this method, but for JavaFX it is not applicable. JavaFX has its own Color class without getRGB() method, that could be used as mediatory convertion. , This does the trick:
code :
// 8 symbols.
String hex1 = Integer.toHexString(myColorPicker.getValue().hashCode()); 

// With # prefix.
String hex2 = "#" + Integer.toHexString(myColorPicker.getValue().hashCode()); 

// 6 symbols in capital letters.
String hex3 = Integer.toHexString(myColorPicker.getValue().hashCode()).substring(0, 6).toUpperCase();

Changing Text Area string colors in javaFX using the ColorPicker


By : Jerry
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Set the value of the text area using setStyle on value change of the ColorPicker.
code :
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

public class TextAreaDemo extends Application {
    @Override
    public void start(Stage stage) {
        final TextArea textArea = new TextArea("Text Sample");
        textArea.setStyle("-fx-text-fill: black;");
        textArea.setPrefSize(200, 40);

        final ColorPicker colorPicker = new ColorPicker(Color.BLACK);
        colorPicker.valueProperty().addListener((observable, oldColor, newColor) ->
            textArea.setStyle(
              "-fx-text-fill: " + toRgbString(newColor) + ";"
            )
        );

        stage.setScene(
            new Scene(new VBox(textArea, colorPicker), 300, 250)
        );
        stage.show();
    }

    private String toRgbString(Color c) {
        return "rgb("
                          + to255Int(c.getRed())
                    + "," + to255Int(c.getGreen())
                    + "," + to255Int(c.getBlue())
             + ")";
    }

    private int to255Int(double d) {
        return (int) (d * 255);
    }

    public static void main(String[] args) {
        launch(args);
    }
}

Is it possible to get the 'new color' in JavaFx ColorPicker?


By : riri riski
Date : March 29 2020, 07:55 AM
hope this fix your issue Yes, the valueProperty() from the ColorPicker control is updated every time you modify the selection in the dialog. Only if you cancel the change, it is backed out.
So you just need to add a listener to that property or bind it as required.
code :
@Override
public void start(Stage primaryStage) {
    ColorPicker picker = new ColorPicker(Color.ALICEBLUE);
    Text text = new Text("Color Picker");
    VBox root = new VBox(10, text, picker);
    root.setAlignment(Pos.CENTER);

    text.fillProperty().bind(picker.valueProperty());

    Scene scene = new Scene(root, 300, 250);

    primaryStage.setTitle("Hello World!");
    primaryStage.setScene(scene);
    primaryStage.show();
}

ColorPicker without color square in Javafx?


By : Saranga Amarasinghe
Date : March 29 2020, 07:55 AM
help you fix your problem You could remove the preview color box from ColorPicker using the CSS below :
code :
.color-picker > .color-picker-label > .picker-color > .picker-color-rect {
    -fx-stroke: null;
    -fx-fill : null;   
}
Rectangle rec = (Rectangle) colorPicker.lookup("Rectangle");
rec.setVisible(false);

Display custom color dialog directly- JavaFX ColorPicker


By : Nate
Date : March 29 2020, 07:55 AM
will be helpful for those in need For starters, com.sun.javafx.scene.control.skin.CustomColorDialog is private API, and it's not advisable to use it, as it may change in the future without notice.
Besides, it is a Dialog, what means you can't embed it into a ContextMenu, it has its own window and it's modal.
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