java 可以决定 GridPane (JavaFX) 中的行数和列数
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时间：2020-11-02 15:35:48 来源:igfitidea点击:
Possible to decide number of rows and columns in GridPane (JavaFX)
提问by Johan Rovala
I was wondering if it is at all possible to decide the number of rows and columns a gridpane should have.
我想知道是否有可能决定网格面板应该具有的行数和列数。
回答by James_D
You can add the required number of ColumnConstraintsand RowConstraintsto the GridPane. For example:
您可以将所需数量的ColumnConstraints和添加RowConstraints到GridPane. 例如：
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.RowConstraints;
import javafx.stage.Stage;
public class GridPaneForceColsAndRows extends Application {
@Override
public void start(Stage primaryStage) {
GridPane root = new GridPane();
root.setGridLinesVisible(true);
final int numCols = 50 ;
final int numRows = 50 ;
for (int i = 0; i < numCols; i++) {
ColumnConstraints colConst = new ColumnConstraints();
colConst.setPercentWidth(100.0 / numCols);
root.getColumnConstraints().add(colConst);
}
for (int i = 0; i < numRows; i++) {
RowConstraints rowConst = new RowConstraints();
rowConst.setPercentHeight(100.0 / numRows);
root.getRowConstraints().add(rowConst);
}
primaryStage.setScene(new Scene(root, 800, 600));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
