java setviewport_Java ImageView.setViewport方法代码示例

import javafx.scene.image.ImageView; //导入方法依赖的package包/类

public ImagePropertiesSample() {

//we can set image properties directly during creation

ImageView sample1 = new ImageView(new Image(url, 30, 70, false, true));

ImageView sample2 = new ImageView(new Image(url));

//image can be resized to preferred width

sample2.setFitWidth(200);

sample2.setPreserveRatio(true);

ImageView sample3 = new ImageView(new Image(url));

//image can be resized to preferred height

sample3.setFitHeight(20);

sample3.setPreserveRatio(true);

ImageView sample4 = new ImageView(new Image(url));

//one can resize image without preserving ratio between height and width

sample4.setFitWidth(40);

sample4.setFitHeight(80);

sample4.setPreserveRatio(false);

sample4.setSmooth(true); //the usage of the better filter

ImageView sample5 = new ImageView(new Image(url));

sample5.setFitHeight(60);

sample5.setPreserveRatio(true);

//viewport is used for displaying the part of image

Rectangle2D rectangle2D = new Rectangle2D(50, 200, 120, 60);

sample5.setViewport(rectangle2D);

//add the imageviews to layout

HBox hBox = new HBox();

hBox.setSpacing(10);

hBox.getChildren().addAll(sample1, sample3, sample4, sample5);

//show the layout

VBox vb = new VBox(10);

vb.getChildren().addAll(hBox, sample2);

getChildren().add(vb);

}

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