我认为选择编辑器的各个部分的最佳方法是检查编辑器中的
caretPosition
并根据需要递增/递减相应的部分。您还可以在编辑器上设置
TextFormatter
以控制允许的输入等。
以下是一个快速尝试:不旨在生产质量,但应该是一个良好的起点:
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.scene.control.Spinner;
import javafx.scene.control.SpinnerValueFactory;
import javafx.scene.control.TextFormatter;
import javafx.scene.input.InputEvent;
import javafx.util.StringConverter;
public class TimeSpinner extends Spinner<LocalTime> {
enum Mode {
HOURS {
@Override
LocalTime increment(LocalTime time, int steps) {
return time.plusHours(steps);
}
@Override
void select(TimeSpinner spinner) {
int index = spinner.getEditor().getText().indexOf(':');
spinner.getEditor().selectRange(0, index);
}
},
MINUTES {
@Override
LocalTime increment(LocalTime time, int steps) {
return time.plusMinutes(steps);
}
@Override
void select(TimeSpinner spinner) {
int hrIndex = spinner.getEditor().getText().indexOf(':');
int minIndex = spinner.getEditor().getText().indexOf(':', hrIndex + 1);
spinner.getEditor().selectRange(hrIndex+1, minIndex);
}
},
SECONDS {
@Override
LocalTime increment(LocalTime time, int steps) {
return time.plusSeconds(steps);
}
@Override
void select(TimeSpinner spinner) {
int index = spinner.getEditor().getText().lastIndexOf(':');
spinner.getEditor().selectRange(index+1, spinner.getEditor().getText().length());
}
};
abstract LocalTime increment(LocalTime time, int steps);
abstract void select(TimeSpinner spinner);
LocalTime decrement(LocalTime time, int steps) {
return increment(time, -steps);
}
}
private final ObjectProperty<Mode> mode = new SimpleObjectProperty<>(Mode.HOURS) ;
public ObjectProperty<Mode> modeProperty() {
return mode;
}
public final Mode getMode() {
return modeProperty().get();
}
public final void setMode(Mode mode) {
modeProperty().set(mode);
}
public TimeSpinner(LocalTime time) {
setEditable(true);
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss");
StringConverter<LocalTime> localTimeConverter = new StringConverter<LocalTime>() {
@Override
public String toString(LocalTime time) {
return formatter.format(time);
}
@Override
public LocalTime fromString(String string) {
String[] tokens = string.split(":");
int hours = getIntField(tokens, 0);
int minutes = getIntField(tokens, 1) ;
int seconds = getIntField(tokens, 2);
int totalSeconds = (hours * 60 + minutes) * 60 + seconds ;
return LocalTime.of((totalSeconds / 3600) % 24, (totalSeconds / 60) % 60, seconds % 60);
}
private int getIntField(String[] tokens, int index) {
if (tokens.length <= index || tokens[index].isEmpty()) {
return 0 ;
}
return Integer.parseInt(tokens[index]);
}
};
TextFormatter<LocalTime> textFormatter = new TextFormatter<LocalTime>(localTimeConverter, LocalTime.now(), c -> {
String newText = c.getControlNewText();
if (newText.matches("[0-9]{0,2}:[0-9]{0,2}:[0-9]{0,2}")) {
return c ;
}
return null ;
});
SpinnerValueFactory<LocalTime> valueFactory = new SpinnerValueFactory<LocalTime>() {
{
setConverter(localTimeConverter);
setValue(time);
}
@Override
public void decrement(int steps) {
setValue(mode.get().decrement(getValue(), steps));
mode.get().select(TimeSpinner.this);
}
@Override
public void increment(int steps) {
setValue(mode.get().increment(getValue(), steps));
mode.get().select(TimeSpinner.this);
}
};
this.setValueFactory(valueFactory);
this.getEditor().setTextFormatter(textFormatter);
this.getEditor().addEventHandler(InputEvent.ANY, e -> {
int caretPos = this.getEditor().getCaretPosition();
int hrIndex = this.getEditor().getText().indexOf(':');
int minIndex = this.getEditor().getText().indexOf(':', hrIndex + 1);
if (caretPos <= hrIndex) {
mode.set( Mode.HOURS );
} else if (caretPos <= minIndex) {
mode.set( Mode.MINUTES );
} else {
mode.set( Mode.SECONDS );
}
});
mode.addListener((obs, oldMode, newMode) -> newMode.select(this));
}
public TimeSpinner() {
this(LocalTime.now());
}
}
这里是使用它的快速示例:
import java.time.format.DateTimeFormatter;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class TimeSpinnerExample extends Application {
@Override
public void start(Stage primaryStage) {
TimeSpinner spinner = new TimeSpinner();
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("hh:mm:ss a");
spinner.valueProperty().addListener((obs, oldTime, newTime) ->
System.out.println(formatter.format(newTime)));
StackPane root = new StackPane(spinner);
Scene scene = new Scene(root, 350, 120);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
SpinnerValueFactory
创建一个Spinner<LocalTime>
。 - James_Dspinner.getEditor().getCaretPosition()
,然后将其与分隔符(即:
)的位置进行比较,以确定要增加/减少哪个单位。 - James_D