删除JavaFX按钮填充？

Question

我正在构建一个非常简单的计算器，我无法弄清楚这些按钮周围的填充来自何处。以下是我如何构建流程窗格：

private FlowPane addFlowPaneRightSide() {

    FlowPane flow = new FlowPane();
    //flow.setPadding(new Insets(0, 0, 0, 0));
    flow.setVgap(0);
    flow.setHgap(0);
    flow.setPrefWrapLength(WIDTH_OF_CENTER / 3); // width of function buttons
    flow.setStyle("-fx-background-color: 978c87;");

    // setup arrays to hold the buttons and images for the right column
    Button operatorButtons[] = new Button[NUM_OP_BUTTONS];
    ImageView operatorImages[] = new ImageView[NUM_OP_BUTTONS];

    for (int i=0; i < NUM_OP_BUTTONS; i++) {
        operatorImages[i] = new ImageView(
                new Image(Calculator.class.getResourceAsStream(
                "images/orange-"+(i)+".png")));
        operatorButtons[i] = new Button();
        operatorButtons[i].setGraphic(operatorImages[i]);
        operatorButtons[i].setId("orange-"+(i));
        flow.getChildren().add(operatorButtons[i]);
    }

    return flow;
}

当我只是将图像放在流程窗格中时它运行正常但是当我开始在循环中创建按钮时它给了我这个：

我的CSS：

/* 
    Document   : stylesheet.css
    for Calculator project in JavaFX
*/

.root{
    -fx-font-size: 14pt;
    -fx-font-family: "Tahoma";
}

.button{
    -fx-text-fill: #006464;
    -fx-skin: "com.sun.javafx.scene.control.skin.ButtonSkin";
    /*-fx-background-color: -fx-shadow-highlight-color, -fx-outer-border, -fx-inner-border, -fx-body-color;*/
    -fx-background-color: transparent;
    -fx-background-insets: 0 0 0 0, 0, 0, 0;
    -fx-background-radius: 0 0 0 0, 0, 0, 0;
    -fx-border-width: 0 0 0 0, 0, 0, 0;
}

.button:focused {
    -fx-color: -fx-focused-base;
    /*-fx-background-color: -fx-focus-color, -fx-outer-border, -fx-inner-border, -fx-body-color;*/
    -fx-background-color: transparent;
    -fx-background-insets: 0 0 0 0, 0, 0, 0;
    -fx-background-radius: 0 0 0 0, 0, 0, 0;
    -fx-border-width: 0 0 0 0, 0, 0, 0;
}

最后是整个计划：

package calculator;


import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.geometry.VPos;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.scene.text.Text; 

/**
 *
 * @author Jim Lohse
 */
public class Calculator extends Application {

    public final int CALC_WIDTH = 500;
    public final int CALC_HEIGHT = 642;
    public final int NUM_BUTTONS = 15;
    public final int NUM_OP_BUTTONS = 5;
    public final int WIDTH_OF_CENTER = 354;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }

        @Override
    public void start(Stage stage) {

// Use a border pane as the root for scene
        BorderPane border = new BorderPane();

        HBox hbox = addHBox();
        border.setTop(hbox);

        border.setRight(addFlowPaneRightSide());

        border.setCenter(addFlowPaneCenter());

        Scene scene = new Scene(border, CALC_WIDTH, CALC_HEIGHT);
        scene.getStylesheets().add("calculator/stylesheet.css");
        stage.setScene(scene);
        stage.setTitle("Calculator");
        stage.setResizable(false);
        stage.show();
    }

/*
 * Creates an HBox with two buttons for the top region
 */

    private HBox addHBox() {

        HBox hbox = new HBox();
        hbox.setPadding(new Insets(15, 12, 15, 12));
        hbox.setSpacing(10);   // Gap between nodes
        hbox.setStyle("-fx-background-color: #336699;");

        Button buttonCurrent = new Button("Current");
        buttonCurrent.setPrefSize(100, 20);

        Button buttonProjected = new Button("Projected");
        buttonProjected.setPrefSize(100, 20);

        hbox.getChildren().addAll(buttonCurrent, buttonProjected);

        return hbox;
    }

/*
 * Creates a horizontal flow pane with the orange operations buttons
 */
    private FlowPane addFlowPaneRightSide() {

        FlowPane flow = new FlowPane();
        //flow.setPadding(new Insets(0, 0, 0, 0));
        flow.setVgap(0);
        flow.setHgap(0);
        flow.setPrefWrapLength(WIDTH_OF_CENTER / 3); // width of function buttons

        // setup arrays to hold the buttons and images for the right column
        Button operatorButtons[] = new Button[NUM_OP_BUTTONS];
        ImageView operatorImages[] = new ImageView[NUM_OP_BUTTONS];

        for (int i=0; i < NUM_OP_BUTTONS; i++) {
            operatorImages[i] = new ImageView(
                    new Image(Calculator.class.getResourceAsStream(
                    "images/orange-"+(i)+".png")));
            operatorButtons[i] = new Button();
            operatorButtons[i].setGraphic(operatorImages[i]);
            operatorButtons[i].setId("orange-"+(i));
            flow.getChildren().add(operatorButtons[i]);
        }

        return flow;
    }

    /*
 * Creates a horizontal flow pane with the orange operations buttons
 */
    private FlowPane addFlowPaneCenter() {

        FlowPane flow = new FlowPane();
        //flow.setPadding(new Insets(0, 0, 0, 0));
        flow.setVgap(0);
        flow.setHgap(0);
        flow.setPrefWrapLength(WIDTH_OF_CENTER); // width of function buttons

        Button centerButtons[] = new Button[NUM_BUTTONS];
        ImageView centerImages[] = new ImageView[NUM_BUTTONS];
        for (int i=0; i < NUM_BUTTONS; i++) {
            centerImages[i] = new ImageView(
                    new Image(Calculator.class.getResourceAsStream(
                    "images/button-"+(i)+".png")));
            centerButtons[i] = new Button();
            centerButtons[i].setGraphic(centerImages[i]);
            centerButtons[i].setId("button-"+(i));
            flow.getChildren().add(centerButtons[i]);
        }

        return flow;
    }
}

Answer 1

我没有你正在使用的图像的副本，所以我看不出它应该是什么样子。但我会试着拍一张正方形的图片。

这让我：

现在，按照我的描述，按钮之间没有实际的填充。我想你可能会说的是标签区域本身有一些填充物会导致问题。这很容易解决。

我如何解决这个问题，方法是在制作每个按钮时添加一行代码（ blah [i] .setPadding（Insets.EMPTY））。

for (int i=0; i < NUM_OP_BUTTONS; i++) {
    operatorImages[i] = new ImageView(
            new Image(Java.class.getResourceAsStream(
                    "art" + File.separator + "Square.png")));
    operatorButtons[i] = new Button();
    operatorButtons[i].setGraphic(operatorImages[i]);
    operatorButtons[i].setPadding(Insets.EMPTY);
    operatorButtons[i].setId("orange-"+(i));
    flow.getChildren().add(operatorButtons[i]);
}

和

for (int i=0; i < NUM_BUTTONS; i++) {
    centerImages[i] = new ImageView(
            new Image(Java.class.getResourceAsStream(
                    "art" + File.separator + "Square.png")));
    centerButtons[i] = new Button();
    centerButtons[i].setGraphic(centerImages[i]);
    centerButtons[i].setPadding(Insets.EMPTY);
    centerButtons[i].setId("button-"+(i));
    flow.getChildren().add(centerButtons[i]);
}

这可以解决你的小问题。

编辑：只是想提一下，你看到的一点点空白是图像本身的一部分，而不是填充。