JavaFX:如何在调整大小后强制重新呈现可写图像?
这个问题和下面的代码有一段历史,比较一下JavaFX:如何在调整大小后强制重新呈现可写图像?,javafx,window-resize,Javafx,Window Resize,这个问题和下面的代码有一段历史,比较一下 导入javafx.application.application; 导入javafx.beans.Observable; 导入javafx.beans.property.SimpleDoubleProperty; 导入javafx.beans.property.SimpleIntegerProperty; 导入javafx.beans.value.ChangeListener; 导入javafx.beans.value.observeValue; 导入j
导入javafx.application.application;
导入javafx.beans.Observable;
导入javafx.beans.property.SimpleDoubleProperty;
导入javafx.beans.property.SimpleIntegerProperty;
导入javafx.beans.value.ChangeListener;
导入javafx.beans.value.observeValue;
导入javafx.event.EventHandler;
导入javafx.geometry.Rectangle2D;
导入javafx.scene.Parent;
导入javafx.scene.scene;
导入javafx.scene.image.ImageView;
导入javafx.scene.image.PixelWriter;
导入javafx.scene.image.WritableImage;
导入javafx.scene.input.KeyCode;
导入javafx.scene.input.KeyEvent;
导入javafx.scene.layout.StackPane;
导入javafx.scene.paint.Color;
导入javafx.stage.Screen;
导入javafx.stage.stage;
公共类ImageOperationApp扩展了应用程序
{
私有SimpleDoubleProperty gridSize=新SimpleDoubleProperty(3.0);
私有SimpleDoubleProperty hueFactor=新的SimpleDoubleProperty(12.0);
私有SimpleDoubleProperty hueOffset=新SimpleDoubleProperty(240.0);
Rectangle2D scr=Screen.getPrimary().getVisualBounds();
int size1=(int)(scr.getWidth()*0.62);
intsize2=(int)(scr.getHeight()*0.62);
SimpleIntegerProperty sip1=新的SimpleIntegerProperty(888);
SimpleIntegerProperty sip2=新的SimpleIntegerProperty(888);
私有void渲染(可写图像img、双网格大小、双hueFactor、双hueOffset)
{
PixelWriter pw=img.getPixelWriter();
double w=sip1.doubleValue();
双h=sip2.doubleValue();
系统输出打印项次(“w”+w+“h”+h);
双X比值=0.0;
双yRatio=0.0;
双色调=0.0;
对于(int y=0;y{
renderImage(img、gridSize.doubleValue()、hueFactor.doubleValue()、hueOffset.doubleValue());
});
hueFactor.addListener((可观察)->{
renderImage(img、gridSize.doubleValue()、hueFactor.doubleValue()、hueOffset.doubleValue());
});
hueOffset.addListener((可观察)->{
renderImage(img、gridSize.doubleValue()、hueFactor.doubleValue()、hueOffset.doubleValue());
});
sip1.addListener((可观察)->{
renderImage(img、gridSize.doubleValue()、hueFactor.doubleValue()、hueOffset.doubleValue());
});
sip2.addListener((可观察)->{
renderImage(img、gridSize.doubleValue()、hueFactor.doubleValue()、hueOffset.doubleValue());
});
渲染(img,3.0,12.0,240.0);
ImageView=新的ImageView(img);
root.getChildren().add(视图);
返回根;
}
@凌驾
public void start(Stage primaryStage)引发异常
{
场景=新场景(createContent());
scene.setOnKeyPressed(新的EventHandler()
{
@凌驾
公共无效句柄(KeyEvent事件)
{
if(event.getCode()==KeyCode.X)
gridSize.set(gridSize.get()+0.5);
if(event.getCode()==KeyCode.Y)
{
double t=gridSize.get();
t-=0.5;
if(t<0)
t=0;
gridSize.set(t);
}
if(event.getCode()==KeyCode.V)
hueFactor.set(hueFactor.get()+0.5);
if(event.getCode()==KeyCode.C)
{
double t=hueFactor.get();
t-=0.5;
if(t<0)
t=0;
hueFactor.set(t);
}
if(event.getCode()==KeyCode.N)
hueOffset.set(hueOffset.get()+10);
if(event.getCode()==KeyCode.B)
{
double t=hueOffset.get();
t-=10;
if(t<0)
t=0;
霍夫特集(t);
}
}
});
scene.widthProperty().addListener(新的ChangeListener()){
@Override public void changed(observeValue我对您的代码做了一些更改:
1) 新实例变量(包括writeableimage
):
2) 在第一行的renderImage
中实例化一个新的writeableimage
并将其设置为view
private void renderImage(double gridSize, double hueFactor, double hueOffset) {
img = new WritableImage(sip1.intValue(), sip2.intValue());
view.setImage(img);
.....
}
3) 在createContent
public Parent createContent() {
StackPane root = new StackPane();
img = new WritableImage(sip1.intValue(), sip2.intValue());
view = new ImageView(img);
....
}
4) 在start
中修复异常:
scene.widthProperty().addListener((observableValue, oldSceneWidth, newSceneWidth) -> {
System.out.println("Width: " + newSceneWidth);
int newValue = newSceneWidth.intValue();
if (newValue < IMAGE_MAX_WIDTH) {
sip1.set(newValue);
}
});
scene.heightProperty().addListener((observableValue, oldSceneHeight, newSceneHeight) -> {
System.out.println("Height: " + newSceneHeight);
int newValue = newSceneHeight.intValue();
if (newValue < IMAGE_MAX_HEIGHT) {
sip2.set(newValue);
}
});
scene.widthProperty().addListener((observeValue,oldSceneWidth,newSceneWidth)->{
System.out.println(“宽度:“+newSceneWidth”);
int newValue=newSceneWidth.intValue();
if(新值<图像最大宽度){
sip1.设置(新值);
}
});
scene.heightProperty().addListener((ObservalEvalue、OldScenehHeight、NewScenehHeight)->{
System.out.println(“高度:+newscenehHeight”);
int newValue=newSceneHeight.intValue();
if(新值<图像最大高度){
sip2.设置(新值);
}
});
如果我正确理解了您的问题,这些更改应该可以解决它
全班:
import javafx.application.Application;
import javafx.beans.Observable;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.event.EventHandler;
import javafx.geometry.Rectangle2D;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.image.ImageView;
import javafx.scene.image.PixelWriter;
import javafx.scene.image.WritableImage;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Screen;
import javafx.stage.Stage;
public class ImageOperationApp extends Application {
private SimpleDoubleProperty gridSize = new SimpleDoubleProperty(3.0);
private SimpleDoubleProperty hueFactor = new SimpleDoubleProperty(12.0);
private SimpleDoubleProperty hueOffset = new SimpleDoubleProperty(240.0);
Rectangle2D scr = Screen.getPrimary().getVisualBounds();
int size1 = (int) (scr.getWidth() * 0.62);
int size2 = (int) (scr.getHeight() * 0.62);
private static final int IMAGE_MAX_WIDTH = 888;
private static final int IMAGE_MAX_HEIGHT = 888;
private final SimpleIntegerProperty sip1 = new SimpleIntegerProperty(IMAGE_MAX_WIDTH);
private final SimpleIntegerProperty sip2 = new SimpleIntegerProperty(IMAGE_MAX_HEIGHT);
private WritableImage img = new WritableImage(sip1.get(), sip2.get());
private ImageView view;
private void renderImage(double gridSize, double hueFactor, double hueOffset) {
img = new WritableImage(sip1.get(), sip2.get());
view.setImage(img);
PixelWriter pw = img.getPixelWriter();
double w = sip1.doubleValue();
double h = sip2.doubleValue();
System.out.println("w " + w + " h " + h);
double xRatio = 0.0;
double yRatio = 0.0;
double hue = 0.0;
for (int y = 0; y < h; y++)
for (int x = 0; x < w; x++) {
xRatio = x / w;
yRatio = y / h;
hue = Math.sin(yRatio * (gridSize * Math.PI)) * Math.sin(xRatio * (gridSize * Math.PI))
* Math.tan(hueFactor / 20.0) * 360.0 + hueOffset;
Color c = Color.hsb(hue, 1.0, 1.0);
pw.setColor(x, y, c);
}
}
public Parent createContent() {
StackPane root = new StackPane();
img = new WritableImage(sip1.intValue(), sip2.intValue());
view = new ImageView(img);
gridSize.addListener((Observable observable) -> {
renderImage(gridSize.doubleValue(), hueFactor.doubleValue(), hueOffset.doubleValue());
});
hueFactor.addListener((Observable observable) -> {
renderImage(gridSize.doubleValue(), hueFactor.doubleValue(), hueOffset.doubleValue());
});
hueOffset.addListener((Observable observable) -> {
renderImage(gridSize.doubleValue(), hueFactor.doubleValue(), hueOffset.doubleValue());
});
sip1.addListener((Observable observable) -> {
renderImage(gridSize.doubleValue(), hueFactor.doubleValue(), hueOffset.doubleValue());
});
sip2.addListener((Observable observable) -> {
renderImage(gridSize.doubleValue(), hueFactor.doubleValue(), hueOffset.doubleValue());
});
renderImage(3.0, 12.0, 240.0);
root.getChildren().add(view);
return root;
}
@Override
public void start(Stage primaryStage) throws Exception {
Scene scene = new Scene(createContent());
scene.setOnKeyPressed(new EventHandler<KeyEvent>() {
@Override
public void handle(KeyEvent event) {
if (event.getCode() == KeyCode.X)
gridSize.set(gridSize.get() + 0.5);
if (event.getCode() == KeyCode.Y) {
double t = gridSize.get();
t -= .5;
if (t < 0)
t = 0;
gridSize.set(t);
}
if (event.getCode() == KeyCode.V)
hueFactor.set(hueFactor.get() + 0.5);
if (event.getCode() == KeyCode.C) {
double t = hueFactor.get();
t -= .5;
if (t < 0)
t = 0;
hueFactor.set(t);
}
if (event.getCode() == KeyCode.N)
hueOffset.set(hueOffset.get() + 10);
if (event.getCode() == KeyCode.B) {
double t = hueOffset.get();
t -= 10;
if (t < 0)
t = 0;
hueOffset.set(t);
}
}
});
scene.widthProperty().addListener((observableValue, oldSceneWidth, newSceneWidth) -> {
System.out.println("Width: " + newSceneWidth);
int newValue = newSceneWidth.intValue();
if (newValue < IMAGE_MAX_WIDTH) {
sip1.set(newValue);
}
});
scene.heightProperty().addListener((observableValue, oldSceneHeight, newSceneHeight) -> {
System.out.println("Height: " + newSceneHeight);
int newValue = newSceneHeight.intValue();
if (newValue < IMAGE_MAX_HEIGHT) {
sip2.set(newValue);
}
});
primaryStage.setTitle("JavaFX Demo");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
导入javafx.application.application;
导入javafx.beans.Observable;
导入javafx.beans.property.SimpleDoubleProperty;
导入javafx.beans.property.SimpleIntegerProperty;
导入javafx.event.EventHandler;
导入javafx.geometry.Rectangle2D;
导入javafx.scene.Parent;
导入javafx.scene.scene;
导入javafx.scene.image.ImageView;
导入javafx.scene.image.PixelWriter;
导入javafx.scene.image.WritableImage;
导入javafx.scene.input.KeyCode;
导入javafx
scene.widthProperty().addListener((observableValue, oldSceneWidth, newSceneWidth) -> {
System.out.println("Width: " + newSceneWidth);
int newValue = newSceneWidth.intValue();
if (newValue < IMAGE_MAX_WIDTH) {
sip1.set(newValue);
}
});
scene.heightProperty().addListener((observableValue, oldSceneHeight, newSceneHeight) -> {
System.out.println("Height: " + newSceneHeight);
int newValue = newSceneHeight.intValue();
if (newValue < IMAGE_MAX_HEIGHT) {
sip2.set(newValue);
}
});
import javafx.application.Application;
import javafx.beans.Observable;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.event.EventHandler;
import javafx.geometry.Rectangle2D;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.image.ImageView;
import javafx.scene.image.PixelWriter;
import javafx.scene.image.WritableImage;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Screen;
import javafx.stage.Stage;
public class ImageOperationApp extends Application {
private SimpleDoubleProperty gridSize = new SimpleDoubleProperty(3.0);
private SimpleDoubleProperty hueFactor = new SimpleDoubleProperty(12.0);
private SimpleDoubleProperty hueOffset = new SimpleDoubleProperty(240.0);
Rectangle2D scr = Screen.getPrimary().getVisualBounds();
int size1 = (int) (scr.getWidth() * 0.62);
int size2 = (int) (scr.getHeight() * 0.62);
private static final int IMAGE_MAX_WIDTH = 888;
private static final int IMAGE_MAX_HEIGHT = 888;
private final SimpleIntegerProperty sip1 = new SimpleIntegerProperty(IMAGE_MAX_WIDTH);
private final SimpleIntegerProperty sip2 = new SimpleIntegerProperty(IMAGE_MAX_HEIGHT);
private WritableImage img = new WritableImage(sip1.get(), sip2.get());
private ImageView view;
private void renderImage(double gridSize, double hueFactor, double hueOffset) {
img = new WritableImage(sip1.get(), sip2.get());
view.setImage(img);
PixelWriter pw = img.getPixelWriter();
double w = sip1.doubleValue();
double h = sip2.doubleValue();
System.out.println("w " + w + " h " + h);
double xRatio = 0.0;
double yRatio = 0.0;
double hue = 0.0;
for (int y = 0; y < h; y++)
for (int x = 0; x < w; x++) {
xRatio = x / w;
yRatio = y / h;
hue = Math.sin(yRatio * (gridSize * Math.PI)) * Math.sin(xRatio * (gridSize * Math.PI))
* Math.tan(hueFactor / 20.0) * 360.0 + hueOffset;
Color c = Color.hsb(hue, 1.0, 1.0);
pw.setColor(x, y, c);
}
}
public Parent createContent() {
StackPane root = new StackPane();
img = new WritableImage(sip1.intValue(), sip2.intValue());
view = new ImageView(img);
gridSize.addListener((Observable observable) -> {
renderImage(gridSize.doubleValue(), hueFactor.doubleValue(), hueOffset.doubleValue());
});
hueFactor.addListener((Observable observable) -> {
renderImage(gridSize.doubleValue(), hueFactor.doubleValue(), hueOffset.doubleValue());
});
hueOffset.addListener((Observable observable) -> {
renderImage(gridSize.doubleValue(), hueFactor.doubleValue(), hueOffset.doubleValue());
});
sip1.addListener((Observable observable) -> {
renderImage(gridSize.doubleValue(), hueFactor.doubleValue(), hueOffset.doubleValue());
});
sip2.addListener((Observable observable) -> {
renderImage(gridSize.doubleValue(), hueFactor.doubleValue(), hueOffset.doubleValue());
});
renderImage(3.0, 12.0, 240.0);
root.getChildren().add(view);
return root;
}
@Override
public void start(Stage primaryStage) throws Exception {
Scene scene = new Scene(createContent());
scene.setOnKeyPressed(new EventHandler<KeyEvent>() {
@Override
public void handle(KeyEvent event) {
if (event.getCode() == KeyCode.X)
gridSize.set(gridSize.get() + 0.5);
if (event.getCode() == KeyCode.Y) {
double t = gridSize.get();
t -= .5;
if (t < 0)
t = 0;
gridSize.set(t);
}
if (event.getCode() == KeyCode.V)
hueFactor.set(hueFactor.get() + 0.5);
if (event.getCode() == KeyCode.C) {
double t = hueFactor.get();
t -= .5;
if (t < 0)
t = 0;
hueFactor.set(t);
}
if (event.getCode() == KeyCode.N)
hueOffset.set(hueOffset.get() + 10);
if (event.getCode() == KeyCode.B) {
double t = hueOffset.get();
t -= 10;
if (t < 0)
t = 0;
hueOffset.set(t);
}
}
});
scene.widthProperty().addListener((observableValue, oldSceneWidth, newSceneWidth) -> {
System.out.println("Width: " + newSceneWidth);
int newValue = newSceneWidth.intValue();
if (newValue < IMAGE_MAX_WIDTH) {
sip1.set(newValue);
}
});
scene.heightProperty().addListener((observableValue, oldSceneHeight, newSceneHeight) -> {
System.out.println("Height: " + newSceneHeight);
int newValue = newSceneHeight.intValue();
if (newValue < IMAGE_MAX_HEIGHT) {
sip2.set(newValue);
}
});
primaryStage.setTitle("JavaFX Demo");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}