javafx gridpane居中对齐并对齐所有标签
我们的想法是创建一个提交表单,该表单有许多标签居中且对齐,例如:javafx gridpane居中对齐并对齐所有标签,java,javafx,alignment,label,gridpane,Java,Javafx,Alignment,Label,Gridpane,我们的想法是创建一个提交表单,该表单有许多标签居中且对齐,例如: 标签1是客户名称,标签2是产品名称我要做的是将所有标签水平居中对齐,这很容易,但同时我希望它们对齐。简而言之,P应正好位于网格窗格第二行的C下方。请注意,每列中最宽的节点负责确定起始x坐标。如果节点居中,则需要将所有节点移动到左侧最大宽度,移动幅度为节点宽度差的一半,这可以通过使用translateX属性实现: 示例 @Override public void start(Stage primaryStage) { Gri
标签1是客户名称,标签2是产品名称我要做的是将所有标签水平居中对齐,这很容易,但同时我希望它们对齐。简而言之,P应正好位于网格窗格第二行的C下方。
请注意,每列中最宽的节点负责确定起始x坐标。如果节点居中,则需要将所有节点移动到左侧最大宽度,移动幅度为节点宽度差的一半,这可以通过使用
translateX
属性实现:
示例
@Override
public void start(Stage primaryStage) {
GridPane gp = new GridPane();
ColumnConstraints constraints = new ColumnConstraints();
constraints.setHalignment(HPos.CENTER);
constraints.setPercentWidth(50);
gp.getColumnConstraints().addAll(constraints, constraints);
Random random = new Random();
Node[][] elements = new Node[2][10];
for (int x = 0; x < elements.length; x++) {
final Node[] column = elements[x];
InvalidationListener sizeListener = o -> {
// determine max width
double maxSize = 0;
for (Node n : column) {
double width = n.getLayoutBounds().getWidth();
if (width > maxSize) {
maxSize = width;
}
}
// adjust translate
for (Node n : column) {
n.setTranslateX((n.getLayoutBounds().getWidth() - maxSize) / 2);
}
};
// fill column with strings of random lenght
for (int y = 0; y < 10; y++) {
int charCount = random.nextInt(30);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < charCount; i++) {
sb.append('a');
}
Label text = new Label(sb.toString());
text.layoutBoundsProperty().addListener(sizeListener);
column[y] = text;
}
gp.addColumn(x, column);
sizeListener.invalidated(null);
}
Scene scene = new Scene(gp);
primaryStage.setScene(scene);
primaryStage.show();
}
如果我用scene builder创建了UI,那么需要对上述内容进行哪些更改code@Takasur由于这不是受支持的标准对齐方式,因此不能简单地在SceneBuilder中设置。您可以使用静态方法将此类行为添加到GridPane
,请参见我的编辑。
public final class WeirdAlign {
private WeirdAlign() {
}
public static final Predicate<Node> ALL_PREDICATE = n -> true;
public static void setCombinedCenterJustify(GridPane gridPane, Predicate<Node> predicate) {
InvalidationListener listener = o -> {
Node n = (Node) ((ReadOnlyProperty) o).getBean();
updateGridPaneColumn(gridPane, getGridPaneColumn(n), predicate);
};
ObservableList<Node> children = gridPane.getChildren();
for (Node n : children) {
if (predicate.test(n)) {
n.layoutBoundsProperty().addListener(listener);
}
}
int[] columns = children.stream().filter(predicate).mapToInt(WeirdAlign::getGridPaneColumn).distinct().toArray();
for (int i : columns) {
updateGridPaneColumn(gridPane, i, predicate);
}
children.addListener((ListChangeListener.Change<? extends Node> c) -> {
Set<Integer> columnsToUpdate = new HashSet<>();
while (c.next()) {
if (c.wasRemoved()) {
for (Node n : c.getRemoved()) {
if (predicate.test(n)) {
n.layoutBoundsProperty().removeListener(listener);
columnsToUpdate.add(getGridPaneColumn(n));
}
}
}
if (c.wasAdded()) {
for (Node n : c.getAddedSubList()) {
if (predicate.test(n)) {
n.layoutBoundsProperty().addListener(listener);
columnsToUpdate.add(getGridPaneColumn(n));
}
}
}
}
for (Integer i : columnsToUpdate) {
updateGridPaneColumn(gridPane, i, predicate);
}
});
}
/**
* This method is only here for FXMLLoader.
*/
public static Predicate<Node> getCombinedCenterJustify(GridPane node) {
throw new UnsupportedOperationException();
}
public static void updateGridPaneColumn(GridPane gridPane, int column, Predicate<Node> predicate) {
double maxSize = 0;
for (Node child : gridPane.getChildren()) {
if (column == getGridPaneColumn(child) && predicate.test(child)) {
double width = child.getLayoutBounds().getWidth();
if (width > maxSize) {
maxSize = width;
}
}
}
for (Node child : gridPane.getChildren()) {
if (column == getGridPaneColumn(child) && predicate.test(child)) {
child.setTranslateX((child.getLayoutBounds().getWidth() - maxSize) / 2);
}
}
}
public static int getGridPaneColumn(Node node) {
Integer c = GridPane.getColumnIndex(node);
return c == null ? 0 : c;
}
}