JavaFX table individual row height, cannot set low values - javafx

Question

Using the code below I wanted to set low values for the row height of a JavaFx table. But to me there seems to be a limit of about 25, higher values will show up correctly, but not below about 25.
I could use setFixedCellSize(10) to set all rows of a table. I would be interested in doing it for individual rows, so I think this should be done in TableCell, right?
Is there a way to get like a row height of 15?
import java.util.stream.IntStream;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.stage.Stage;
public class TableCellTest extends Application {
public static void main(String[] args) {
launch(args);
}
#Override public void start(Stage stage) throws Exception {
int numCols = 20;
int numRows = 20;
ObservableList<Integer> rows = FXCollections.observableList(IntStream.rangeClosed(1, numRows).boxed().toList());
TableView<Integer> tv = new TableView<>(rows);
for (int i = 0; i < numCols; i++) {
TableColumn<Integer, String> col = new TableColumn<>();
col.setCellFactory(ts -> new TableCell<>() {
{
setPrefHeight(10); //does not apply values below about 25
}
});
tv.getColumns().add(col);
}
Scene scene = new Scene(tv, 900, 600);
stage.setScene(scene);
stage.show();
}
}
Version 2:
Here I tried to use set prefHeight of a TableRow for selected rows, this sort of is the answer to my original question, but side effect is there is now empty space below the table, and those empty rows below the actual TableView even change their height if I drag columns to reorder them. I cannot access those rows as they are outside the range of the TableView. Not a satisfying situation.
import java.util.stream.IntStream;
import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.stage.Stage;
public class TableCellTest3 extends Application {
public static void main(String[] args) {
launch(args);
}
#Override public void start(Stage stage) throws Exception {
int numCols = 20;
int numRows = 20;
ObservableList<Integer> rows = FXCollections.observableList(IntStream.rangeClosed(1, numRows).boxed().toList());
TableView<Integer> tv = new TableView<>(rows);
for (int i = 0; i < numCols; i++) {
TableColumn<Integer, String> col = new TableColumn<>();
int ii = i;
col.setCellValueFactory(cdf -> new SimpleStringProperty(String.valueOf(ii)));
col.setCellFactory(ts -> new TableCell<>() {
#Override public void updateItem(String item, boolean empty) {
super.updateItem(item, empty);
if (item == null || empty) {
setText(null);
} else {
TableRow<Integer> row = getTableRow();
if (row != null) {
if (row.getItem() != null && row.getItem().intValue() < 10) {
row.setPrefHeight(15); //prefHeight of a row can be set low enough
} else {
row.setPrefHeight(25);
};
}
setText(item);
}
}
});
tv.getColumns().add(col);
}
Scene scene = new Scene(tv, 900, 600);
stage.setScene(scene);
stage.show();
}
}
Version 3
moving height setting code into TableRow's updateItem function instead of TableCell's updateItem function also produces empty space below the table, although this time those rows do not change their height when columns are dragged around.
Seems that whatever way, setting the prefHeight of a TableRow screws up the evaluation of how many filler rows are needed at the bottom of a table? Should this value really be dealt with at 'user level' ?
import java.util.stream.IntStream;
import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.stage.Stage;
public class TableCellTest4 extends Application {
public static void main(String[] args) {
launch(args);
}
#Override public void start(Stage stage) throws Exception {
int numCols = 20;
int numRows = 20;
ObservableList<Integer> rows = FXCollections.observableList(IntStream.rangeClosed(1, numRows).boxed().toList());
TableView<Integer> tv = new TableView<>(rows);
for (int i = 0; i < numCols; i++) {
TableColumn<Integer, String> col = new TableColumn<>();
int ii = i;
col.setCellValueFactory(cdf -> new SimpleStringProperty(String.valueOf(ii)));
tv.getColumns().add(col);
}
tv.setRowFactory(tview -> new TableRow<Integer>() {
#Override public void updateItem(Integer item, boolean empty) {
super.updateItem(item, empty);
if (item != null && item < 10) {
setPrefHeight(15);
} else {
setPrefHeight(25);
}
}
});
Scene scene = new Scene(tv, 900, 600);
stage.setScene(scene);
stage.show();
}
}