我该如何更改这个场景的背景颜色?我错过了什么吗?我尝试了以下方法:
这个命令实际上是没有错误的,但它不会改变颜色。
scene.setFill(Color.GRAY);
这个命令也是没有错误的,但它也不会改变颜色。
Scene scene = new Scene(pane, 250, 250, Color.GRAY);
感谢您的回复。
代码:===================================================...
这个命令实际上是没有错误的,但它不会改变颜色。
scene.setFill(Color.GRAY);
这个命令也是没有错误的,但它也不会改变颜色。
Scene scene = new Scene(pane, 250, 250, Color.GRAY);
感谢您的回复。
代码:===================================================...
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Group;
import javafx.scene.transform.Rotate;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.BorderPane;
import javafx.scene.paint.Color;
import java.util.Calendar;
import java.util.GregorianCalendar;
import javafx.scene.layout.Pane;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Line;
import javafx.scene.text.Text;
public class DisplayResizableClock extends Application {
@Override // Override the start method in the Application class
public void start(Stage primaryStage) {
// Create a clock and a label
ClockPane2 clock = new ClockPane2();
//clock.setF;
String timeString = clock.getHour() + ":" + clock.getMinute()
+ ":" + clock.getSecond();
Label lblCurrentTime = new Label(timeString);
// Place clock and label in border pane
BorderPane pane = new BorderPane();
pane.setCenter(clock);
pane.setBottom(lblCurrentTime);
BorderPane.setAlignment(lblCurrentTime, Pos.TOP_CENTER);
// Create a scene and place the pane in the stage
Scene scene = new Scene(pane, 250, 250);
scene.setFill(Color.GRAY);
primaryStage.setTitle("Display Resizable Clock"); // Set the stage title===========
primaryStage.setScene(scene); // Place the scene in the stage
primaryStage.show(); // Display the stage
pane.widthProperty().addListener(ov ->
clock.setWidth(pane.getWidth())
);
pane.heightProperty().addListener(ov ->
clock.setHeight(pane.getHeight())
);
}
/**
* The main method is only needed for the IDE with limited
* JavaFX support. Not needed for running from the command line.
*/
public static void main(String[] args) {
launch(args);
}
}
//=====================
class ClockPane2 extends Pane {
private int hour;
private int minute;
private int second;
/** Construct a default clock with the current time*/
public ClockPane2() {
setCurrentTime();
}
/** Construct a clock with specified hour, minute, and second */
public ClockPane2(int hour, int minute, int second) {
this.hour = hour;
this.minute = minute;
this.second = second;
}
/** Return hour */
public int getHour() {
return hour;
}
/** Set a new hour */
public void setHour(int hour) {
this.hour = hour;
paintClock();
}
/** Return minute */
public int getMinute() {
return minute;
}
/** Set a new minute */
public void setMinute(int minute) {
this.minute = minute;
paintClock();
}
/** Return second */
public int getSecond() {
return second;
}
/** Set a new second */
public void setSecond(int second) {
this.second = second;
paintClock();
}
/* Set the current time for the clock */
public void setCurrentTime() {
// Construct a calendar for the current date and time
Calendar calendar = new GregorianCalendar();
// Set current hour, minute and second
this.hour = calendar.get(Calendar.HOUR_OF_DAY);
this.minute = calendar.get(Calendar.MINUTE);
this.second = calendar.get(Calendar.SECOND);
paintClock(); // Repaint the clock
}
/** Paint the clock */
private void paintClock() {
// Initialize clock parameters
double clockRadius =
Math.min(getWidth(), getHeight()) * 0.8 * 0.5;
double centerX = getWidth() / 2;
double centerY = getHeight() / 2;
// Draw circle
Circle circle = new Circle(centerX, centerY, clockRadius);
circle.setFill(Color.YELLOW); //=====changed color==============
circle.setStroke(Color.BLACK);
Text t1 = new Text(centerX - 5, centerY - clockRadius + 12, "12");
Text t2 = new Text(centerX - clockRadius + 3, centerY + 5, "9");
Text t3 = new Text(centerX + clockRadius - 10, centerY + 3, "3");
Text t4 = new Text(centerX - 3, centerY + clockRadius - 3, "6");
// Draw second hand
double sLength = clockRadius * 0.8;
double secondX = centerX + sLength *
Math.sin(second * (2 * Math.PI / 60));
double secondY = centerY - sLength *
Math.cos(second * (2 * Math.PI / 60));
Line sLine = new Line(centerX, centerY, secondX, secondY);
sLine.setStroke(Color.RED);
// Draw minute hand
double mLength = clockRadius * 0.65;
double xMinute = centerX + mLength *
Math.sin(minute * (2 * Math.PI / 60));
double minuteY = centerY - mLength *
Math.cos(minute * (2 * Math.PI / 60));
Line mLine = new Line(centerX, centerY, xMinute, minuteY);
mLine.setStroke(Color.BROWN); //changed color to brown======================
// Draw hour hand
double hLength = clockRadius * 0.5;
double hourX = centerX + hLength *
Math.sin((hour % 12 + minute / 60.0) * (2 * Math.PI / 12));
double hourY = centerY - hLength *
Math.cos((hour % 12 + minute / 60.0) * (2 * Math.PI / 12));
Line hLine = new Line(centerX, centerY, hourX, hourY);
hLine.setStroke(Color.GREEN);
getChildren().clear(); // Clear the pane
getChildren().addAll(circle, t1, t2, t3, t4, sLine, mLine, hLine);
Group ticks = new Group();//create tick hands============================
Group numbers = new Group(); //create numbers==========================
// creating the big ticks (12)===============================
for (int i = 0; i < 12; i++) {
/*creating a line with a width of 10 and placing at 'clockRadius'
distance away from center*/
Line tick = new Line(0, clockRadius, 0, clockRadius - 10);
tick.setTranslateX(centerX);
tick.setTranslateY(centerY);
//applying proper rotation to rotate the tick
tick.getTransforms().add(new Rotate(i * (360 / 12)));
//adding to ticks group
ticks.getChildren().add(tick);
}
// creating the small ticks=========================================
for (int i = 0; i < 60; i++) {
//lines will have a width of 5
Line tick = new Line(0, clockRadius, 0, clockRadius - 5);
tick.setTranslateX(centerX);
tick.setTranslateY(centerY);
tick.getTransforms().add(new Rotate(i * (360 / 60)));
ticks.getChildren().add(tick);
}
// creating the numbers==================================================
int num = 12; // starting with 12
for (int i = 0; i < 12; i++) {
//finding proper position x and y by applying the equation
double x = centerX + (clockRadius - 20) * Math.sin((i % 12) * (2 * Math.PI / 12));
double y = centerY - (clockRadius - 20) * Math.cos((i % 12) * (2 * Math.PI / 12));
//defining a text with hour label, (x-5 and y+5 are used to align text
//in proper position, considering font height & width)
Text t = new Text(x - 5, y + 5, "" + num);
numbers.getChildren().add(t);
num++;
if (num > 12) {
num = 1;
}
}
// adding ticks and numbers======================
getChildren().add(ticks);
getChildren().add(numbers);
}
@Override
public void setWidth(double width) {
super.setWidth(width);
paintClock();
}
@Override
public void setHeight(double height) {
super.setHeight(height);
paintClock();
}
}
...