Java GridPane.getRowIndex方法代碼示例

import javafx.scene.layout.GridPane; //導入方法依賴的package包/類
private GridPane removeRowFromGridPane(int row, GridPane gridPane ) {
    Set<Node> deleteNodes = new HashSet<>();
    for (Node child : gridPane.getChildren()) {
        // get index from child
        Integer rowIndex = GridPane.getRowIndex(child);

        // handle null values for index=0
        int r = rowIndex == null ? 0 : rowIndex;

        if (r == row) {
            // collect matching rows for deletion
            deleteNodes.add(child);
        }
    }
    gridPane.getChildren().removeAll(deleteNodes);
    return gridPane;
}
 

import javafx.scene.layout.GridPane; //導入方法依賴的package包/類
private void render(TimeLine timeLine) {
    int columnsNumber = getCellNumber(width, SPACING, sideSize);
    int rowsNumber = getCellNumber(height, SPACING, sideSize);

    int centerColumn = columnsNumber / 2;
    int centerRow = rowsNumber / 2;

    for (Node node : scene.getChildren()) {
        int x = GridPane.getColumnIndex(node);
        int y = GridPane.getRowIndex(node);

        Rectangle square = (Rectangle) node;
        if (timeLine.isAlive(new Point(x - centerColumn, y - centerRow))) {
            square.setFill(ALIVE_COLOR);
        } else {
            square.setFill(DEAD_COLOR);
        }
    }
}
 

import javafx.scene.layout.GridPane; //導入方法依賴的package包/類
private javafx.scene.Node getNodeByRowColumnIndex(final int row, final int column, GridPane gridPane) {
    javafx.scene.Node result = null;
    ObservableList<javafx.scene.Node> children = gridPane.getChildren();

    for (javafx.scene.Node node : children) {
        if(GridPane.getRowIndex(node) == row && GridPane.getColumnIndex(node) == column) {
            result = node;
            break;
        }
    }

    return result;
}
 

import javafx.scene.layout.GridPane; //導入方法依賴的package包/類
/**
 * Checks if a tile with the given width and height would overlap a pre-existing tile at the point {@code (col, row)},
 * ignoring some nodes when calculating collisions. Note that this method does <i>not</i> perform bounds checking;
 * use {@link #isOpen(int, int, int, int, Predicate) isOpen} to check if a widget can be placed at that point.
 *
 * @param col        the column index of the point to check
 * @param row        the row index of the point to check
 * @param tileWidth  the width of the tile
 * @param tileHeight the height of the tile
 * @param ignore     a predicate to use to ignore nodes when calculating collisions
 */
public boolean isOverlapping(int col, int row, int tileWidth, int tileHeight, Predicate<Node> ignore) {
  for (Node child : getChildren()) {
    if (ignore.test(child)) {
      continue;
    }
    // All "real" children have a column index, row index, and column and row spans
    // Other children (like the grid lines) don't have these properties and will throw null pointers
    // when trying to access these properties
    if (GridPane.getColumnIndex(child) != null) {
      int x = GridPane.getColumnIndex(child);
      int y = GridPane.getRowIndex(child);
      int width = GridPane.getColumnSpan(child);
      int height = GridPane.getRowSpan(child);
      if (x + width > col && y + height > row
          && x - tileWidth < col && y - tileHeight < row) {
        // There's an intersection
        return true;
      }
    }
  }
  return false;
}
 

import javafx.scene.layout.GridPane; //導入方法依賴的package包/類
private int getRowCount(GridPane pane) {
    int numRows = pane.getRowConstraints().size();
    for (int i = 0; i < pane.getChildren().size(); i++) {
        Node child = pane.getChildren().get(i);
        if (child.isManaged()) {
            Integer rowIndex = GridPane.getRowIndex(child);
            if (rowIndex != null) {
                numRows = Math.max(numRows, rowIndex + 1);
            }
        }
    }
    return numRows;
}
 

import javafx.scene.layout.GridPane; //導入方法依賴的package包/類
private int getColCount(GridPane pane) {
    int numCols = pane.getRowConstraints().size();
    for (int i = 0; i < pane.getChildren().size(); i++) {
        Node child = pane.getChildren().get(i);
        if (child.isManaged()) {
            Integer colIndex = GridPane.getRowIndex(child);
            if (colIndex != null) {
                numCols = Math.max(numCols, colIndex + 1);
            }
        }
    }
    return numCols;
}
 

import javafx.scene.layout.GridPane; //導入方法依賴的package包/類
private double getY(javafx.scene.Node node) {
    int row = GridPane.getRowIndex(node);
    return (projection.getSideSize() + TwoDimensionalProjection.SPACING) * row;
}