javaFX,一次两个mouseevent
我正试图在我的程序中编写一个用鼠标画线的窗口。到目前为止,我已经提供了这个解决方案:javaFX,一次两个mouseevent,javafx,mouseevent,Javafx,Mouseevent,我正试图在我的程序中编写一个用鼠标画线的窗口。到目前为止,我已经提供了这个解决方案: public class TrackEditor extends Stage { TrackDescription editedTrackDescription; double startX, startY; LineTo line; MoveTo move; boolean pressed; public TrackEditor() {
public class TrackEditor extends Stage
{
TrackDescription editedTrackDescription;
double startX, startY;
LineTo line;
MoveTo move;
boolean pressed;
public TrackEditor()
{
Path path = new Path();
this.setTitle("New Game");
this.setResizable(false);
StackPane stackPane = new StackPane();
SquareGrid squareGrid = new SquareGrid();
Pane drawingPane = new Pane();
Pane activePane = new Pane();
stackPane.getChildren().addAll(squareGrid,drawingPane, activePane);
drawingPane.getChildren().add(path);
activePane.setOnMousePressed((MouseEvent me) -> {
pressed = true;
startX = me.getX();
startY = me.getY();
move = new MoveTo(me.getX(), me.getY());
path.getElements().add(move);
});
activePane.setOnMouseReleased((MouseEvent me) -> {
pressed = false;
line = new LineTo(me.getX(), me.getY());
path.getElements().add(line);
});
activePane.setOnMouseMoved((MouseEvent me) -> {
if(pressed)
{
activePane.getChildren().clear();
Line temporaryLine = new Line(startX, startY, me.getX(), me.getY());
activePane.getChildren().add(temporaryLine);
}
});
Scene scene = new Scene(stackPane);
this.setScene(scene);
this.initModality(Modality.APPLICATION_MODAL);
this.sizeToScene();
this.show();
}
}
但是,正如我所观察到的,当按下鼠标按钮时,不会绘制临时线。事件
鼠标按下
和鼠标释放
之间是否存在某种冲突,或者问题出在其他地方?我想您正在尝试检测鼠标何时被拖动(即按下按钮时移动鼠标)。您不需要自己跟踪按下的
标记,底层事件系统将为您执行此操作
activePane.setOnMousePressed((MouseEvent me) -> {
startX = me.getX();
startY = me.getY();
move = new MoveTo(me.getX(), me.getY());
path.getElements().add(move);
});
activePane.setOnMouseReleased((MouseEvent me) -> {
line = new LineTo(me.getX(), me.getY());
path.getElements().add(line);
});
activePane.setOnMouseDragged((MouseEvent me) -> {
activePane.getChildren().clear();
Line temporaryLine = new Line(startX, startY, me.getX(), me.getY());
activePane.getChildren().add(temporaryLine);
});
非常感谢,我根本不知道这件事