我想在JavaFX中显示包含各种矩形的网格。重要的是此网格无法调整大小。
我选择了GridPane
布局。我动态添加javafx.scene.shape.Rectangle
。这是我的网格在2行和4列中的样子。
调整大小后,我希望它保持相同的整体形状,也就是说每个Rectangle
具有相同的大小,并在Rectangle
s之间保持水平和垂直间隙。
然而,这是我用4x4网格得到的:
问题是:
这是我负责刷新显示的代码:
Rectangle
使用public void refreshConstraints() {
getRowConstraints().clear();
getColumnConstraints().clear();
for (int i = 0; i < nbRow; i++) {
RowConstraints rConstraint = new RowConstraints();
// ((nbRow - 1) * 10 / nbRow) = takes gap into account (10% of height)
rConstraint.setPercentHeight(100 / nbRow - ((nbRow - 1) * 10 / nbRow));
getRowConstraints().add(rConstraint);
}
for (int i = 0; i < nbColumn; i++) {
ColumnConstraints cConstraint = new ColumnConstraints();
cConstraint.setPercentWidth(100 / nbColumn - ((nbColumn - 1) * 10 / nbColumn));
getColumnConstraints().add(cConstraint);
}
}
和setFillWidth
也没有产生任何结果,差距保持在我的setHgrow
之间,但Rectangle
s未调整大小,重叠其余的GUI元素。
编辑:MCVE代码:
Rectangle
答案 0 :(得分:10)
似乎TilePane比GridPane更适合此用例。
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.TilePane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
// java 8 code
public class DynamicTiles extends Application {
//Class containing grid (see below)
private GridDisplay gridDisplay;
//Class responsible for displaying the grid containing the Rectangles
public class GridDisplay {
private static final double ELEMENT_SIZE = 100;
private static final double GAP = ELEMENT_SIZE / 10;
private TilePane tilePane = new TilePane();
private Group display = new Group(tilePane);
private int nRows;
private int nCols;
public GridDisplay(int nRows, int nCols) {
tilePane.setStyle("-fx-background-color: rgba(255, 215, 0, 0.1);");
tilePane.setHgap(GAP);
tilePane.setVgap(GAP);
setColumns(nCols);
setRows(nRows);
}
public void setColumns(int newColumns) {
nCols = newColumns;
tilePane.setPrefColumns(nCols);
createElements();
}
public void setRows(int newRows) {
nRows = newRows;
tilePane.setPrefRows(nRows);
createElements();
}
public Group getDisplay() {
return display;
}
private void createElements() {
tilePane.getChildren().clear();
for (int i = 0; i < nCols; i++) {
for (int j = 0; j < nRows; j++) {
tilePane.getChildren().add(createElement());
}
}
}
private Rectangle createElement() {
Rectangle rectangle = new Rectangle(ELEMENT_SIZE, ELEMENT_SIZE);
rectangle.setStroke(Color.ORANGE);
rectangle.setFill(Color.STEELBLUE);
return rectangle;
}
}
@Override
public void start(Stage primaryStage) {
//Represents the grid with Rectangles
gridDisplay = new GridDisplay(2, 4);
//Fields to specify number of rows/columns
TextField rowField = new TextField("2");
TextField columnField = new TextField("4");
//Function to set an action when text field loses focus
buildTextFieldActions(rowField, columnField);
HBox fields = new HBox(10);
fields.getChildren().add(rowField);
fields.getChildren().add(new Label("x"));
fields.getChildren().add(columnField);
BorderPane mainPanel = new BorderPane();
mainPanel.setCenter(gridDisplay.getDisplay());
mainPanel.setTop(fields);
Scene scene = new Scene(mainPanel, 1000, 800);
primaryStage.setTitle("Test grid display");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
private void buildTextFieldActions(final TextField rowField, final TextField columnField) {
rowField.focusedProperty().addListener((ov, t, t1) -> {
if (!t1) {
if (!rowField.getText().equals("")) {
try {
int nbRow = Integer.parseInt(rowField.getText());
gridDisplay.setRows(nbRow);
} catch (NumberFormatException nfe) {
System.out.println("Please enter a valid number.");
}
}
}
});
columnField.focusedProperty().addListener((ov, t, t1) -> {
if (!t1) {
if (!columnField.getText().equals("")) {
try {
int nbColumn = Integer.parseInt(columnField.getText());
gridDisplay.setColumns(nbColumn);
} catch (NumberFormatException nfe) {
System.out.println("Please enter a valid number.");
}
}
}
});
}
}
答案 1 :(得分:3)
非常感谢您的回答。 TilePane
确实更容易使用,虽然你所写的并不能完全回答我的问题。
我希望有一个窗格,其中孩子会调整大小,而不是窗格本身。似乎设置maxSize
和prefSize
没有任何效果。
编辑:我设法在我的Property
类中使用两个JavaFX GridDisplay
,对应于网格的固定高度和宽度:
public class GridDisplay {
private ReadOnlyDoubleProperty heightProperty;
private ReadOnlyDoubleProperty widthProperty;
...
}
然后我将这些成员分配给构造函数中所需固定大小的值。网格内部子项的大小对应于网格高度和宽度的一小部分,具体取决于行数和列数。这是我updateDisplay()
的样子:
public void updateDisplay() {
gridPane.getChildren().clear();
for (int i = 0; i < nbColumn; i++) {
for (int j = 0; j < nbRow; j++) {
Rectangle rectangle = new Rectangle(100, 100);
//Binding the fraction of the grid size to the width
//and heightProperty of the child
rectangle.widthProperty().bind(widthProperty.divide(nbColumn));
rectangle.heightProperty().bind(heightProperty.divide(nbRow));
gridPane.add(rectangle, i, j);
}
}
}