在JavaFX2中的图片顶部绘制矩形
我试图使用JavaFX2中的鼠标事件在图片上绘制矩形 现在,我在StackPane中有一个ImageView,我在上面添加了矩形。问题是,即使我将矩形的X和Y设置为MouseEvent X和Y,矩形也会在堆栈窗格中居中 我猜默认情况下是StackPane将每个孩子放在中心位置,但我找不到一个合适的解决方案。你们能给我指一下正确的方向吗 这是我的密码:在JavaFX2中的图片顶部绘制矩形,java,javafx-2,javafx,fxml,scenebuilder,Java,Javafx 2,Javafx,Fxml,Scenebuilder,我试图使用JavaFX2中的鼠标事件在图片上绘制矩形 现在,我在StackPane中有一个ImageView,我在上面添加了矩形。问题是,即使我将矩形的X和Y设置为MouseEvent X和Y,矩形也会在堆栈窗格中居中 我猜默认情况下是StackPane将每个孩子放在中心位置,但我找不到一个合适的解决方案。你们能给我指一下正确的方向吗 这是我的密码: @FXML private StackPane stack_pane; private final ImageView image_view =
@FXML
private StackPane stack_pane;
private final ImageView image_view = new ImageView();
private final Set<Rectangle> rectangles = new HashSet<Rectangle>();
private final SimpleDoubleProperty selectionRectInitialX = new SimpleDoubleProperty();
private final SimpleDoubleProperty selectionRectInitialY = new SimpleDoubleProperty();
private final SimpleDoubleProperty selectionRectCurrentX = new SimpleDoubleProperty();
private final SimpleDoubleProperty selectionRectCurrentY = new SimpleDoubleProperty();
private Rectangle selectionRect;
@Override
public void initialize(final URL fxmlFileLocation, final ResourceBundle resources)
{
this.stack_pane.getChildren().add(this.image_view);
this.selectionRect = this.getRectangle();
this.selectionRect.widthProperty().bind(this.selectionRectCurrentX.subtract(this.selectionRectInitialX));
this.selectionRect.heightProperty().bind(this.selectionRectCurrentY.subtract(this.selectionRectInitialY));
this.stack_pane.setOnMousePressed(new EventHandler<MouseEvent>()
{
@Override
public void handle(final MouseEvent event)
{
MainWindowController.this.selectionRect.xProperty().set(event.getX());
MainWindowController.this.selectionRect.yProperty().set(event.getY());
MainWindowController.this.selectionRectInitialX.set(event.getX());
MainWindowController.this.selectionRectInitialY.set(event.getY());
}
});
this.stack_pane.setOnMouseDragged(new EventHandler<MouseEvent>()
{
@Override
public void handle(final MouseEvent event)
{
MainWindowController.this.selectionRectCurrentX.set(event.getX());
MainWindowController.this.selectionRectCurrentY.set(event.getY());
MainWindowController.this.repaint();
}
});
this.stack_pane.setOnMouseReleased(new EventHandler<MouseEvent>()
{
@Override
public void handle(final MouseEvent event)
{
final Rectangle newRect = MainWindowController.this.getRectangle();
newRect.setWidth(MainWindowController.this.selectionRect.getWidth());
newRect.setHeight(MainWindowController.this.selectionRect.getHeight());
newRect.setX(MainWindowController.this.selectionRect.getX());
newRect.setY(MainWindowController.this.selectionRect.getY());
MainWindowController.this.selectionRectCurrentX.set(0);
MainWindowController.this.selectionRectCurrentY.set(0);
MainWindowController.this.rectangles.add(newRect);
MainWindowController.this.repaint();
}
});
}
public Rectangle getRectangle()
{
final Rectangle rect = new Rectangle();
rect.setFill(Color.web("firebrick", 0.4));
rect.setStroke(Color.web("firebrick", 0.4));
return rect;
}
public void repaint()
{
this.stack_pane.getChildren().clear();
this.stack_pane.getChildren().add(this.image_view);
this.stack_pane.getChildren().add(this.selectionRect);
for (final Rectangle rect : this.rectangles)
{
this.stack_pane.getChildren().add(rect);
}
}
@FXML
专用堆栈窗格堆栈_窗格;
私有最终ImageView image_view=新ImageView();
私有最终集矩形=新HashSet();
私有最终SimpleDoubleProperty selectionRectInitialX=新SimpleDoubleProperty();
private final SimpleDoubleProperty selectionRectInitialY=新SimpleDoubleProperty();
私有最终SimpleDoubleProperty selectionRectCurrentX=新SimpleDoubleProperty();
private final SimpleDoubleProperty SelectionRecCurrenty=新SimpleDoubleProperty();
私有矩形选择矩形;
@凌驾
public void initialize(最终URL fxmlFileLocation,最终ResourceBundle资源)
{
this.stack_pane.getChildren().add(this.image_视图);
this.selectionRect=this.getRectangle();
this.selectionRect.widthProperty().bind(this.selectionRectCurrentX.subtract(this.selectionRectInitialX));
this.selectionRect.heightProperty().bind(this.selectionRectCurrentY.subtract(this.selectionRectInitialY));
this.stack_pane.setOnMousePressed(新的EventHandler()
{
@凌驾
公共无效句柄(最终MouseeEvent事件)
{
MainWindowController.this.selectionRect.xProperty().set(event.getX());
MainWindowController.this.selectionRect.yProperty().set(event.getY());
MainWindowController.this.selectionRectInitialX.set(event.getX());
MainWindowController.this.selectionRectInitialY.set(event.getY());
}
});
this.stack_pane.setOnMouseDrawed(新的EventHandler()
{
@凌驾
公共无效句柄(最终MouseeEvent事件)
{
MainWindowController.this.selectionRectCurrentX.set(event.getX());
MainWindowController.this.selectionRectCurrentY.set(event.getY());
MainWindowController.this.repaint();
}
});
this.stack_pane.setOnMouseReleased(新的EventHandler()
{
@凌驾
公共无效句柄(最终MouseeEvent事件)
{
最终矩形newRect=MainWindowController.this.getRectangle();
newRect.setWidth(MainWindowController.this.selectionRect.getWidth());
newRect.setHeight(MainWindowController.this.selectionRect.getHeight());
newRect.setX(MainWindowController.this.selectionRect.getX());
newRect.setY(MainWindowController.this.selectionRect.getY());
MainWindowController.this.selectionRectCurrentX.set(0);
MainWindowController.this.selectionRectCurrentY.set(0);
MainWindowController.this.rectangles.add(newRect);
MainWindowController.this.repaint();
}
});
}
公共矩形getRectangle()
{
最终矩形rect=新矩形();
矩形设置填充(Color.web(“firebrick”,0.4));
直接设置行程(颜色web(“firebrick”,0.4));
返回矩形;
}
公共无效重绘()
{
这个.stack_pane.getChildren().clear()文件;
this.stack_pane.getChildren().add(this.image_视图);
this.stack_pane.getChildren().add(this.selectionRect);
for(最终矩形:this.rectanges)
{
这个.stack_pane.getChildren().add(rect);
}
}
将StackPane更改为AnchorPane。AnchorPane允许您设置每个子级相对于窗格的X、Y 尝试设置StackPane的对齐方式:
StackPane.setAlignment(选择直线,位置居中左)
请参阅Pos类的值参考。哇,太简单了!谢谢!