JavaFx：液体和固定网格窗格列宽

Question

我有 4 列的网格窗格（fixed1、liquid、fixed2、liquid）。每个液柱的宽度必须=（gridpane宽度-固定1-固定2）/2。换句话说，液体宽度的 50%。重要提示：所有宽度=液体宽度+固定宽度。为了设置列约束，我找到了以下代码：

GridPane gridpane = new GridPane();
ColumnConstraints col1 = new ColumnConstraints();
col1.setPercentWidth(25);
gridpane.getColumnConstraints().addAll(col1);

但是，此代码设置的不是液体宽度的百分比，而是所有宽度的百分比。怎么做？

Answer 1

尝试这个;

@Override
public void start( final Stage primaryStage )
{

    ColumnConstraints col1 = new ColumnConstraints();
    col1.setHgrow( Priority.ALWAYS );

    ColumnConstraints col2 = new ColumnConstraints();
    col2.setHgrow( Priority.ALWAYS );

    GridPane gridPane = new GridPane();
    gridPane.setGridLinesVisible( true );
    gridPane.getColumnConstraints().addAll( new ColumnConstraints( 60 ), col1, new ColumnConstraints( 100 ), col2 );

    gridPane.addColumn( 0, new Button( "col 1" ) );
    gridPane.addColumn( 1, new Button( "col 2" ) );
    gridPane.addColumn( 2, new Button( "col 3" ) );
    gridPane.addColumn( 3, new Button( "col 4" ) );

    final Scene scene = new Scene( new VBox( gridPane ), 400, 300 );
    primaryStage.setScene( scene );
    primaryStage.show();
}

通过调整窗口大小来测试占用的宽度。空闲空间在增长的列之间平均共享Priority.ALWAYS。有 2 个，所以每个 50%。结果它的分布如下：

col-1: fixed 60px
col-2: floated 50%
col-3: fixed 100px
col-4: floated 50%