Question

注意：JavaFX新手

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Buttton.setPadding

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所以每个人都知道填充是什么，但here是Android澄清的一个例子。

问题：

设置（和更改）javafx button上的填充会增加按钮的大小，但不会增加＆＃34;空间＆＃34;在它自己和它（邻近）邻居之间。

更多信息：

我想在退出和重置按钮之间留一个空格。

假设：

Button btnExit = new Button("Exit");

填充通常只需设置：

btnExit.setPadding(new Insets(10))   //10 px "buffer" around button

或

btnExit.setPadding(new Insets(0, 10, 0, 0))   //10 px "buffer" on right only

我这样做是全面的填充，但不是创建这个缓冲区，而是放大按钮大小。

无填充（btnExit.setPadding(new Insets(0));）

PADDING_LARGE=10

使用填充（btnReset.setPadding(new Insets(PADDING_LARGE));）

代码：

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.Border;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
import javafx.scene.control.Button;

public class SOS extends Application{

    private int GRID_SIZE = 5;
    private int PADDING_MEDIUM = 5;
    private int PADDING_LARGE = 10;
    private int PADDING_XLARGE = 20;

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

    @Override
    public void start(Stage primaryStage) throws Exception {
        //create display boxes
        VBox vbRoot = new VBox(),
                vbGrid = new VBox(),
                vbFooter = new VBox(),
                vbPlayers = new VBox(),
                vbGridInfo = new VBox(),
                vbHeader = new VBox();
        HBox hbOptions = new HBox(),
                hbDone = new HBox(),
                hbGameDetails = new HBox(),
                hbGameTitle = new HBox();

        //=====================HEADER=================================
        Label title = new Label("SOS Game");
        title.setFont(new Font(16));
        hbGameTitle.getChildren().add(title);
        hbGameTitle.setAlignment(Pos.CENTER);

        Label player1 = new Label("Player 1 = ");
        Label player2 = new Label("Player 2 = ");
        vbPlayers.getChildren().addAll(player1,player2);
        vbPlayers.setAlignment(Pos.CENTER);

        Label lblGridPosOpen = new Label("Places Open = ");
        vbGridInfo.getChildren().add(lblGridPosOpen);
        vbGridInfo.setAlignment(Pos.CENTER);

        //add player and grid info boxes to game details box
        hbGameDetails.getChildren().addAll(vbGridInfo, vbPlayers);

        //add game title and game info boxes to header
        vbHeader.getChildren().addAll(hbGameTitle, hbGameDetails);


        //=====================GRID====================================
        GridPane grid = getGrid(GRID_SIZE);

        //add grid object to grid pane
        vbGrid.getChildren().addAll(grid);
        vbGrid.setPadding(new Insets(PADDING_XLARGE));
        vbGrid.setAlignment(Pos.CENTER);

        //======================FOOTER================================
        //set DONE button with padding and callback
        Button btnDone = new Button("DONE");

        btnDone.setMinWidth(130);
        btnDone.setMinHeight(50);
        btnDone.setOnAction(event -> checkSOS());
        btnDone.setPadding(new Insets(PADDING_MEDIUM));

        //add button done to box
        hbDone.getChildren().add(btnDone);
        hbDone.setPadding(new Insets(PADDING_MEDIUM));
        hbDone.setAlignment(Pos.CENTER);

        //set Exit and Reset buttons with padding and callbacks
        Button btnExit = new Button("Exit");
        Button btnReset = new Button("Reset");

        btnExit.setMinWidth(60);
        btnExit.setMinHeight(25);
        btnExit.setPadding(new Insets(PADDING_LARGE));
        btnExit.setOnAction(event -> System.exit(0));

        btnReset.setMinWidth(60);
        btnReset.setMinHeight(25);
        btnReset.setPadding(new Insets(PADDING_LARGE));
        btnReset.setOnAction(event -> reset());

        //add exit and reset buttons to options box
        hbOptions.getChildren().addAll(btnExit, btnReset);
        hbOptions.setPadding(new Insets(PADDING_MEDIUM));
        hbOptions.setAlignment(Pos.CENTER);

        //add done and options boxes to footer
        vbFooter.getChildren().addAll(hbDone, hbOptions);

        //=====================COMBINE ALL======================

        //combine all sections with padding
        vbRoot.getChildren().addAll(vbHeader, vbGrid, vbFooter);
        hbOptions.setPadding(new Insets(PADDING_MEDIUM));

        //=====================SET STAGE===========================
        primaryStage.setTitle("SOS by :)");
        primaryStage.setScene(new Scene(vbRoot));
        primaryStage.setResizable(false);
        primaryStage.show();
    }

    /**
     * Returns a new grid with buttons
     * @param size  Size of grid
     * @return  new grid
     */
    private GridPane getGrid(int size) {
        GridPane grid = new GridPane();
        for (int i = 0; i < size; i++) {
            for (int j = 0; j < size; j++) {
                grid.add(getSOSButton(), i, j);
            }
        }
        return grid;
    }

    /**
     * Returns a button with callback to change text
     * @return
     */
    private Button getSOSButton(){
        //create button
        Button b = new Button();
        b.setMinHeight(50);
        b.setMaxHeight(50);
        b.setMinWidth(50);
        b.setMaxWidth(50);

        //set callback
        b.setOnAction(event -> b.setText((b.getText().equals("O") || b.getText().isEmpty()) ? "S" : "O"));
        return b;
    }

    private void reset(){

    }

    private void checkSOS(){

    }
}

Answer 1

JavaFX中的填充应该增加按钮大小，但它不会影响按钮外的区域。填充是指按钮内部的区域，但在文本周围，因此，文本的“填充”。如果要在按钮外部填充，则必须在构造函数中更改包含节点（在本例中为hbOptions），如下所示：

HBox hbOptions = new HBox(numberValueInPointsByWhichYouWantToSeparateYourButtons);

或致电

hbOptions.setSpacing(numberValueInPointsByWhichYouWantToSeparateYourButtons);

此setSpacing（双倍间距）方法指的是HBox的子节点的间距，在本例中是两个按钮。

（此答案的帮助来自Adding space between buttons in VBox和the HBox documentation）。

JavaFX按钮填充更改按钮大小

1 个答案: