Question

我尝试创建取消按钮，如下所示：

我正在使用字母＆＃39; x＆＃39;。

现在我试图减少按钮中的空白区域，但我无法找到摆脱垂直空间的方法。

目前我有这样的事情：

package test;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Priority;
import javafx.scene.layout.Region;
import javafx.stage.Stage;

public class CancelButtonTestApplication extends Application {

    @Override
    public void start(Stage primaryStage) {
        GridPane gridPane = new GridPane();

        Label someLabel = new Label("Some Label:");
        Button cancelButton = new Button("x");
        cancelButton.setStyle("-fx-padding: 0.083333em 0.083333em 0.083333em 0.083333em;"); /* 1 1 1 1 */
        cancelButton.setMaxHeight(Region.USE_PREF_SIZE);
        someLabel.setLabelFor(cancelButton);
        gridPane.add(someLabel, 0, 0);
        gridPane.add(cancelButton, 1, 0);
        gridPane.setHgap(5.0d);
        GridPane.setVgrow(cancelButton, Priority.NEVER);
        GridPane.setHgrow(cancelButton, Priority.NEVER);

        Scene scene = new Scene(gridPane, 200, 50);

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

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

}

看起来像这样：

Answer 1

不确定你为什么不使用Insets？

我做了cancelButton.setPadding(new Insets(-5,0,-2,0));然后我能够移除顶部/底部空间（可用于Captial X）。使用大写X，我的意思是如果你使用X而不是x，你将不需要任何特殊的填充，但只需要Insets.EMPTY。

要保持动态，您甚至可以尝试FontMetrics

 FontMetrics metrics = Toolkit.getToolkit().getFontLoader().getFontMetrics(cancelButton.getFont());
cancelButton.setPadding(new Insets(-metrics.getDescent()*1.8, 0, -metrics.getDescent(), 0));

此代码应在scene.show()之后得到正确的矩阵。

完整代码：

package test;

import com.sun.javafx.tk.FontMetrics;
import com.sun.javafx.tk.Toolkit;
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Priority;
import javafx.scene.layout.Region;
import javafx.stage.Stage;

public class CloseButtonTestApplication extends Application {

    @Override
    public void start(Stage primaryStage) {
        GridPane gridPane = new GridPane();

        Label someLabel = new Label("Some Label:");


        Button cancelButton = new Button("x");

         //cancelButton.setStyle("-fx-padding: 0.083333em 0.083333em 0.083333em 0.083333em;"); /* 1 1 1 1 */
        cancelButton.setMaxHeight(Region.USE_PREF_SIZE);
        //cancelButton.setPadding(new Insets(0,0,0,0));
        someLabel.setLabelFor(cancelButton);

        Button cancelButton2 = new Button("X");

         //cancelButton.setStyle("-fx-padding: 0.083333em 0.083333em 0.083333em 0.083333em;"); /* 1 1 1 1 */
        cancelButton2.setMaxHeight(Region.USE_PREF_SIZE);
        cancelButton2.setPadding(new Insets(0,0,0,0));
        someLabel.setLabelFor(cancelButton);
        gridPane.add(someLabel, 0, 0);
        gridPane.add(cancelButton, 1, 0);
        gridPane.add(cancelButton2, 2, 0);

        gridPane.setHgap(5.0d);
        GridPane.setVgrow(cancelButton, Priority.NEVER);
        GridPane.setHgrow(cancelButton, Priority.NEVER);

        Scene scene = new Scene(gridPane, 200, 50);

        primaryStage.setTitle("Hello World!");
        primaryStage.setScene(scene);
        primaryStage.show();
        FontMetrics metrics = Toolkit.getToolkit().getFontLoader().getFontMetrics(cancelButton.getFont());
        cancelButton.setPadding(new Insets(-metrics.getDescent()*1.8, 0, -metrics.getDescent(), 0));



    }

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

}

按钮：最小尺寸

1 个答案: