我正在尝试构建一个简单的Java项目,其中包含6个窗格(作为父级添加到GridPane Layout中)。我必须在开始时设置窗口大小,然后通过参考根目录布局的宽度和高度来设法将它们平均分配。
{
"status": "ok",
"sets": {
"caseStudies": [
{
"_id": "1",
"title": "Case Study Item One",
"_title": "Case Study Item One",
"date": "2018-06-01"
}
]
}
}
但是我希望它们在更改窗口大小时进行调整大小(使用鼠标,现在它们的大小已固定)。
所以我的问题是,如何在JavaFX中完成此操作?
>在调整窗口大小时,如何使元素拉伸并填充布局/布局的一部分,然后更改大小?这是我的代码:
pane.setMinSize(root.getWidth()/3, root.getHeight()/2);
答案 0 :(得分:1)
使用ColumnConstraints
和RowConstraints
来实现所需的调整大小行为:
import javafx.application.Application;
import javafx.collections.ObservableList;
import javafx.geometry.HPos;
import javafx.geometry.Insets;
import javafx.geometry.VPos;
import javafx.scene.Scene;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.CornerRadii;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Priority;
import javafx.scene.layout.RowConstraints;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class Main6 extends Application {
private static final int ROWS = 2, COLS = 3;
private static final Color[][] colors = new Color[][] {
{Color.GREEN, Color.WHITE, Color.GRAY},
{Color.BLUE, Color.RED, Color.YELLOW}
};
@Override
public void start(Stage primaryStage) throws Exception {
GridPane root = new GridPane();
root.setMaxSize(Double.MAX_VALUE, Double.MAX_VALUE);
//add panels
for(int row = 0; row < ROWS; row++){
for(int col = 0; col < COLS; col++){
root.getChildren().add( getPane(row, col));
}
}
//Construct column constraints to resize horizontaly
ObservableList<ColumnConstraints> colCconstraints = root.getColumnConstraints();
colCconstraints.clear();
for(int col = 0; col < COLS; col++){
ColumnConstraints c = new ColumnConstraints();
c.setHalignment(HPos.CENTER);
c.setHgrow(Priority.ALWAYS);
colCconstraints.add(c);
}
//Construct row constraints to resize vertically
ObservableList<RowConstraints> rowCconstraints = root.getRowConstraints();
rowCconstraints.clear();
for(int row = 0; row < ROWS; row++){
RowConstraints c = new RowConstraints();
c.setValignment(VPos.CENTER);
c.setVgrow(Priority.ALWAYS);
rowCconstraints.add(c);
}
Scene scene = new Scene(root);
primaryStage.setTitle("Learning JavaFX");
primaryStage.setScene(scene);
primaryStage.sizeToScene();
primaryStage.show();
}
/**
*
*/
private Pane getPane(int row, int col) {
Pane pane = new Pane();
pane.setBackground(new Background(new BackgroundFill(colors[row][col], CornerRadii.EMPTY, Insets.EMPTY)));
pane.setPrefSize(300, 300);
GridPane.setRowIndex(pane, row);
GridPane.setColumnIndex(pane, col);
return pane;
}
public static void main(String[] args) {
launch(args);
}
}
答案 1 :(得分:0)
好的,我找到了部分解决方案。我添加了我的代码:
ColumnConstraints column1 = new ColumnConstraints();
column1.setPercentWidth(33.333333);
ColumnConstraints column2 = new ColumnConstraints();
column2.setPercentWidth(33.333333);
ColumnConstraints column3 = new ColumnConstraints();
column3.setPercentWidth(33.333333);
root.getColumnConstraints().addAll(column1, column2, column3);
RowConstraints row1 = new RowConstraints();
row1.setPercentHeight(50);
RowConstraints row2 = new RowConstraints();
row2.setPercentHeight(50);
root.getRowConstraints().addAll(row1, row2);
并删除了设置窗格大小的所有行,并允许调整内容的大小。
但是
当我将百分比宽度指定为(100/3)而不是33.3333时,它在窗口的右侧留下了一个奇怪的空白。有人可以向我解释为什么会这样吗?
看看: