JavaFX的2.X; 上图+变焦静止问题战平(JavaFX 2.x; Still proble

2019-09-22 09:42发布

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我仍然是具有这种硬问题我解决不了挣扎：下面的代码执行放大（放大）通过点击鼠标左键并拖动图表上（从上左到下右）和恢复背面形成向下从右到左向上。

用鼠标右键单击并拖动进行免费的手绘：问题是，如果我画再放大，什么绘制位移，这是不是我以前绘制的。

如何解决这一问题？

谢谢

下面的代码： 

public class Zoom extends Application {

    Path path;//Add path for freehand
    BorderPane pane;
    Rectangle rect;
    SimpleDoubleProperty rectinitX = new SimpleDoubleProperty();
    SimpleDoubleProperty rectinitY = new SimpleDoubleProperty();
    SimpleDoubleProperty rectX = new SimpleDoubleProperty();
    SimpleDoubleProperty rectY = new SimpleDoubleProperty();

    double initXLowerBound = 0, initXUpperBound = 0, initYLowerBound = 0, initYUpperBound = 0;

    @Override
    public void start(Stage stage) {

        stage.setTitle("Lines plot");

        //final CategoryAxis xAxis = new CategoryAxis();
        final NumberAxis xAxis = new NumberAxis(1, 12, 1);
        final NumberAxis yAxis = new NumberAxis(0.53000, 0.53910, 0.0005);

        yAxis.setTickLabelFormatter(new NumberAxis.DefaultFormatter(yAxis) {

            @Override
            public String toString(Number object) {
                return String.format("%7.5f", object);
            }
        });

        final LineChart<Number, Number> lineChart = new LineChart<Number, Number>(xAxis, yAxis);

        lineChart.setCreateSymbols(false);
        lineChart.setAlternativeRowFillVisible(false);
        lineChart.setAnimated(true);

        XYChart.Series series1 = new XYChart.Series();

        series1.getData().add(new XYChart.Data(1, 0.53185));
        series1.getData().add(new XYChart.Data(2, 0.532235));
        series1.getData().add(new XYChart.Data(3, 0.53234));
        series1.getData().add(new XYChart.Data(4, 0.538765));
        series1.getData().add(new XYChart.Data(5, 0.53442));
        series1.getData().add(new XYChart.Data(6, 0.534658));
        series1.getData().add(new XYChart.Data(7, 0.53023));
        series1.getData().add(new XYChart.Data(8, 0.53001));
        series1.getData().add(new XYChart.Data(9, 0.53589));
        series1.getData().add(new XYChart.Data(10, 0.53476));
        series1.getData().add(new XYChart.Data(11, 0.530123));
        series1.getData().add(new XYChart.Data(12, 0.53035));

        pane = new BorderPane();
        pane.setCenter(lineChart);
    //  Scene scene = new Scene(lineChart, 800, 600);
        Scene scene = new Scene(pane, 800, 600);
        lineChart.getData().addAll(series1);

        initXLowerBound = ((NumberAxis) lineChart.getXAxis()).getLowerBound();
        initXUpperBound = ((NumberAxis) lineChart.getXAxis()).getUpperBound();
        initYLowerBound = ((NumberAxis) lineChart.getYAxis()).getLowerBound();
        initYUpperBound = ((NumberAxis) lineChart.getYAxis()).getUpperBound();

        stage.setScene(scene);        

        path = new Path();
        path.setStrokeWidth(1);
        path.setStroke(Color.BLACK);

        scene.setOnMouseClicked(mouseHandler);
        scene.setOnMouseDragged(mouseHandler);
        scene.setOnMouseEntered(mouseHandler);
        scene.setOnMouseExited(mouseHandler);
        scene.setOnMouseMoved(mouseHandler);
        scene.setOnMousePressed(mouseHandler);
        scene.setOnMouseReleased(mouseHandler);

        //root.getChildren().add(lineChart);
        pane.getChildren().add(path);

        rect = new Rectangle();
        rect.setFill(Color.web("blue", 0.1));
        rect.setStroke(Color.BLUE);
        rect.setStrokeDashOffset(50);

        rect.widthProperty().bind(rectX.subtract(rectinitX));
        rect.heightProperty().bind(rectY.subtract(rectinitY));
        pane.getChildren().add(rect);

        stage.show();
    }
    // sum layout shift against parent until we ascend to scene


    EventHandler<MouseEvent> mouseHandler = new EventHandler<MouseEvent>() {

    @Override
    public void handle(MouseEvent mouseEvent) {
        if (mouseEvent.getButton() == MouseButton.PRIMARY) {
            if (mouseEvent.getEventType() == MouseEvent.MOUSE_PRESSED) {
                rect.setX(mouseEvent.getX());
                rect.setY(mouseEvent.getY());
                rectinitX.set(mouseEvent.getX());
                rectinitY.set(mouseEvent.getY());
            } else if (mouseEvent.getEventType() == MouseEvent.MOUSE_DRAGGED) {
                rectX.set(mouseEvent.getX());
                rectY.set(mouseEvent.getY());
            } else if (mouseEvent.getEventType() == MouseEvent.MOUSE_RELEASED) {

                if ((rectinitX.get() >= rectX.get()) && (rectinitY.get() >= rectY.get())) {
                    //Condizioni Iniziali
                    LineChart<Number, Number> lineChart = (LineChart<Number, Number>) pane.getCenter();

                    ((NumberAxis) lineChart.getXAxis()).setLowerBound(initXLowerBound);
                    ((NumberAxis) lineChart.getXAxis()).setUpperBound(initXUpperBound);

                    ((NumberAxis) lineChart.getYAxis()).setLowerBound(initYLowerBound);
                    ((NumberAxis) lineChart.getYAxis()).setUpperBound(initYUpperBound);

                    ZoomFreeHand(path, 1.0, 1.0, 0, 0);

                } else {
                    //Zoom In

                    double Tgap = 0;
                    double newLowerBound, newUpperBound, axisShift;
                    double xScaleFactor, yScaleFactor;
                    double xaxisShift, yaxisShift;
//                  System.out.println("Zoom bounds : [" + rectinitX.get() + ", " +rectinitY.get()
//                                     + "] ["+ rectX.get()+", "+rectY.get()+"]");
//                  System.out.println("TODO: Determine bound ranges according these zoom coordinates.\n");

                    // TODO: Determine bound ranges according this zoom coordinates.
                    //LineChart<String, Number> lineChart = (LineChart<String, Number>) pane.getCenter();
                    LineChart<Number, Number> lineChart = (LineChart<Number, Number>) pane.getCenter();

                    // Zoom in Y-axis by changing bound range.            
                    NumberAxis yAxis = (NumberAxis) lineChart.getYAxis();
                    Tgap = yAxis.getHeight()/(yAxis.getUpperBound() - yAxis.getLowerBound());
                    axisShift = getSceneShiftY(yAxis);
                    yaxisShift = axisShift;

                    newUpperBound = yAxis.getUpperBound() - ((rectinitY.get() - axisShift) / Tgap);
                    newLowerBound = yAxis.getUpperBound() - (( rectY.get() - axisShift) / Tgap);


//                  System.out.println("(a) rectinitY.get() "+rectinitY.get()+" rectY.get() "+rectY.get());
//                  System.out.println("(a) Tgap "+Tgap+" axisShift "+axisShift+" yAxis.getLowerBound() "
//                                     + yAxis.getLowerBound()+ " " + yAxis.getUpperBound());

                    if (newUpperBound > yAxis.getUpperBound())
                        newUpperBound = yAxis.getUpperBound();

                    yScaleFactor = (yAxis.getUpperBound() - yAxis.getLowerBound())/(newUpperBound - newLowerBound);
                    yAxis.setLowerBound(newLowerBound);
                    yAxis.setUpperBound(newUpperBound);

//                  System.out.println("(b) yAxis.getLowerBound() " + yAxis.getLowerBound()+ " "
//                                     + yAxis.getUpperBound());

                    // Zoom in X-axis by removing first and last data values.
                    // Note: Maybe better if categoryaxis is replaced by numberaxis then setting the
                    // LowerBound and UpperBound will be avaliable.
/*
                    XYChart.Series series1 = lineChart.getData().get(0);
                    if (!series1.getData().isEmpty()) {
                        series1.getData().remove(0);
                        series1.getData().remove(series1.getData().size() - 1);
                    }
 */

                    NumberAxis xAxis = (NumberAxis) lineChart.getXAxis();

//                  System.out.println("(a) xAxis.getLowerBound() " + xAxis.getLowerBound()+ " "
//                                     + xAxis.getUpperBound());            

                    Tgap = xAxis.getWidth()/(xAxis.getUpperBound() - xAxis.getLowerBound());            
//                  newXlower = (rectinitX.get()/Tgap) + xAxis.getLowerBound();
//                  newXupper = (rectX.get()/Tgap)+xAxis.getLowerBound();

                    axisShift = getSceneShiftX(xAxis);                        
                    xaxisShift = axisShift;

                    newLowerBound = ((rectinitX.get() - axisShift) / Tgap) + xAxis.getLowerBound();
                    newUpperBound = ((rectX.get() - axisShift) / Tgap) + xAxis.getLowerBound();                

                    if (newUpperBound > xAxis.getUpperBound())
                        newUpperBound = xAxis.getUpperBound();

                    xScaleFactor = (xAxis.getUpperBound() - xAxis.getLowerBound())/(newUpperBound - newLowerBound);
                    xAxis.setLowerBound( newLowerBound );
                    xAxis.setUpperBound( newUpperBound );



//                  System.out.println("(b) xAxis.getLowerBound() "+xAxis.getLowerBound()+" "+xAxis.getUpperBound());

                    ZoomFreeHand(path, xScaleFactor, yScaleFactor, xaxisShift, yaxisShift);
                }
                // Hide the rectangle
                rectX.set(0);
                rectY.set(0);
            }
        }// end if (mouseEvent.getButton() == MouseButton.PRIMARY)
        else if (mouseEvent.getButton() == MouseButton.SECONDARY) //free hand graphics
        {
            if (mouseEvent.getEventType() == MouseEvent.MOUSE_PRESSED) {
                path.getElements().clear();
                path.getElements().add(new MoveTo(mouseEvent.getX(), mouseEvent.getY()));
            } else if (mouseEvent.getEventType()==MouseEvent.MOUSE_DRAGGED) {
                path.getElements().add(new LineTo(mouseEvent.getX(), mouseEvent.getY()));
            }
        } //end if (mouseEvent.getButton() == MouseButton.SECONDARY)
    }
};

    private static double getSceneShiftX(Node node) {
        double shift = 0;
        do { 
            shift += node.getLayoutX(); 
            node = node.getParent();
        } while (node != null);
        return shift;
    }

    private static double getSceneShiftY(Node node) {
        double shift = 0;
        do { 
            shift += node.getLayoutY(); 
            node = node.getParent();
        } while (node != null);
        return shift;
    }

    private static void ZoomFreeHand(Path path, double xScaleFactor, double yScaleFactor,
            double xaxisShift, double yaxisShift) {
/*
        ObservableList<PathElement> ListPath = path.getElements();

        if (ListPath.size() != 0) {
            MoveTo moveto;
            ((MoveTo)(ListPath.get(0))).setX(0-axisShiftX);    
            ((MoveTo)(ListPath.get(0))).setY(0-axisShiftY);
        }
*/

        path.setScaleX(xScaleFactor);
        path.setScaleY(yScaleFactor);
        path.setTranslateX(xaxisShift);
        path.setTranslateY(yaxisShift);
    }

    public static void main(String[] args) {
        launch(args);
    }

}

编辑：我有过这样的建议，

尝试使用画布上图表之上的覆盖。 然后，你可以缩放画布。

但没有有关如何使用画布这个问题线索

EDIT2：另一项建议

看来你坐标基于错误的锚。 你需要找到其中包含图形本身和工作只与该节点的坐标，而不是轴或场景的节点。 我甚至会建议所有的鼠标事件添加到该节点，而不是现场，以避免过多的坐标转换。 另外的建议是使用ScenicView工具来调查你的应用程序，看看哪些节点有什么坐标和验证你的数学。

编辑3：这些照片可以帮助更好地解释我的问题

Answer 1:

你正在谈论的地方，当变焦时，图纸是不是你希望它是一个问题，是吗？

在代码ZoomFreeHand ，于轴线移位的代码被注释。

我会认为，要解决这个问题，你将不得不适当地移轴。 即使注释掉的代码是不是为你工作，一些需要有正确计算和移动轴，使你所绘制，你希望它停留。



Answer 2:

我现在明白这个问题有点。 下面可能没有帮助。 但是反正...

我不知道确切的要求，但可能是下面会给你一些想法。

画出你需要放大父的一切信息。 

Pane root = new Pane();
root.getChildren().add( new Line( 10, 10, 100, 100 ) );

而让Java的处理变焦上里面的一切。 像下面这样会放大对鼠标滚轮的内容。 

root.setOnScroll( new ScrollHandler() );

private class ScrollHandler implements EventHandler< ScrollEvent > {
    @Override
    public void handle( ScrollEvent event ) {
        root.setScaleX( root.getScaleX() + event.getDeltaY() * .005 );
        root.setScaleY( root.getScaleY() + event.getDeltaY() * .005 );
    }
}


Answer 3:

我通过解决这个问题， 

   yAxis.setLowerBound(10);
    yAxis.setUpperBound(100);
    yAxis.setTickUnit(5);


文章来源: JavaFX 2.x; Still problems with draw on chart + zoom
标签： charts javafx-2 zoom draw
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