Snippets
Created by
Terah
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import javafx.application.Platform;
import javafx.event.EventHandler;
import javafx.geometry.Point2D;
import javafx.scene.Cursor;
import javafx.scene.Node;
import javafx.scene.effect.DropShadow;
import javafx.scene.input.DragEvent;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Region;
public class Utitlities {
/**
* This code section is for making a node resizeable only when moouse is coming from the outside
*/
private final static Object resizableFeatureKey = new Object();
private static class NodeResizableHandlersHolder {
EventHandler<MouseEvent> mouseClickedDownHandler, mouseClickedUpHandler, mouseMovedHandler, mouseEnteredHandler,
mouseExitedHandler, mouseDraggedHandler;
private boolean enteredState = false;
private boolean dragState = false;
private Region nodeInQuestion = null;
private final double resizeBorderThickness = 20.0;
private Point2D lastKnownPointerValue = null;
private final DropShadow dropShadow = new DropShadow();
public NodeResizableHandlersHolder() {
this(null);
}
public NodeResizableHandlersHolder(Region n) {
initializeEventHandlers();
if (n != null) {
installHandlersOnNode(n);
}
}
private final void initializeEventHandlers() {
mouseClickedDownHandler = new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent arg0) {
Node n = nodeInQuestion;
dragState = (n.getCursor() == Cursor.E_RESIZE || n.getCursor() == Cursor.H_RESIZE
|| n.getCursor() == Cursor.N_RESIZE || n.getCursor() == Cursor.NE_RESIZE
|| n.getCursor() == Cursor.NW_RESIZE || n.getCursor() == Cursor.S_RESIZE
|| n.getCursor() == Cursor.SE_RESIZE || n.getCursor() == Cursor.SW_RESIZE
|| n.getCursor() == Cursor.V_RESIZE || n.getCursor() == Cursor.W_RESIZE)
/* && arg0.isPrimaryButtonDown() */;
if (dragState) {
// System.out.println("is drag state activated");
}
}
};
mouseClickedUpHandler = new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent arg0) {
// if(dragState){
dragState = false;
// System.out.println("drag state de-activated");
// }
//since we need it to be later. as mouseMoved events are still being propagated
//Platform.runLater(() -> enteredState = false);
}
};
mouseEnteredHandler = new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent arg0) {
nodeInQuestion.setCursor(getCursorFromPoint(arg0.getSceneX(), arg0.getSceneY()));
nodeInQuestion.setEffect(dropShadow);
//since we need it to be later. as mouseMoved events are still being propagated
Platform.runLater(() -> enteredState = true);
}
};
mouseExitedHandler = new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent arg0) {
enteredState = false;
nodeInQuestion.setEffect(null);
}
};
mouseMovedHandler = new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent arg0) {
if (enteredState) {
boolean changeCursor = (lastKnownPointerValue.getX() > 0
&& Math.abs(lastKnownPointerValue.getX() - arg0.getSceneX()) > resizeBorderThickness)
|| (lastKnownPointerValue.getY() > 0 && Math
.abs(lastKnownPointerValue.getY() - arg0.getSceneY()) > resizeBorderThickness);
if (changeCursor) {
nodeInQuestion.setCursor(Cursor.DEFAULT);
enteredState = false;
lastKnownPointerValue = null;
}
}
}
};
mouseDraggedHandler = new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent arg0) {
if (dragState) {
/*
* System.out.println("Moving in dragstate ");
* System.out.println("screen x " +
* String.valueOf(arg0.getScreenX()) +" screen y " +
* arg0.getScreenY()); System.out.println("sceen x " +
* String.valueOf(arg0.getSceneX()) +" sceen y " +
* arg0.getSceneY());
*/
nodeInQuestion.setEffect(null);
double width = nodeInQuestion.getBoundsInLocal().getMinX() + arg0.getSceneX();
double height = nodeInQuestion.getBoundsInLocal().getMinY() + arg0.getSceneY();
if (nodeInQuestion.getCursor() == Cursor.H_RESIZE) { // only horizontal
nodeInQuestion.setPrefWidth(width);
} else if (nodeInQuestion.getCursor() == Cursor.V_RESIZE) { // only vertical
nodeInQuestion.setPrefHeight(height);
} else {
nodeInQuestion.setPrefSize(width, height);
}
}
}
};
}
public final void installHandlersOnNode(Region n) {
n.setMinSize(Region.USE_COMPUTED_SIZE, Region.USE_COMPUTED_SIZE);
n.setOnMouseMoved(mouseMovedHandler);
n.setOnDragDetected(mouseClickedDownHandler);
n.setOnMouseReleased(mouseClickedUpHandler);
n.setOnMouseEntered(mouseEnteredHandler);
n.setOnMouseExited(mouseExitedHandler);
n.setOnMouseDragged(mouseDraggedHandler);
n.getProperties().put(resizableFeatureKey, this);
nodeInQuestion = n;
}
private final Cursor getCursorFromPoint(double x, double y) {
Cursor cursor = Cursor.NONE;
lastKnownPointerValue = new Point2D(x, y);
boolean isRightWidthPref = nodeInQuestion.getBoundsInLocal().getMaxX() <= x
&& nodeInQuestion.getBoundsInLocal().getMinX() < x;
boolean isLeftWidthPref = nodeInQuestion.getBoundsInLocal().getMinX() >= x
&& nodeInQuestion.getBoundsInLocal().getMaxX() > x;
boolean isTopHeightPref = nodeInQuestion.getBoundsInLocal().getMinY() >= y
&& nodeInQuestion.getBoundsInLocal().getMaxY() > y;
boolean isBottomHeightPref = nodeInQuestion.getBoundsInLocal().getMaxY() <= y
&& nodeInQuestion.getBoundsInLocal().getMinY() < y;
if (isRightWidthPref && isBottomHeightPref) {
cursor = Cursor.SE_RESIZE;
} else if (isRightWidthPref && isTopHeightPref) {
cursor = Cursor.NE_RESIZE;
} else if (isLeftWidthPref && isBottomHeightPref) {
cursor = Cursor.SW_RESIZE;
} else if (isLeftWidthPref && isTopHeightPref) {
cursor = Cursor.NW_RESIZE;
} else if (isLeftWidthPref || isRightWidthPref) {
cursor = Cursor.H_RESIZE;
lastKnownPointerValue = new Point2D(x, 0);
} else if (isBottomHeightPref || isTopHeightPref) {
cursor = Cursor.V_RESIZE;
lastKnownPointerValue = new Point2D(0, y);
}
System.out.println(cursor.toString());
return cursor;
}
}
public static void addResizableFeatureToNode(Region node) {
if (!node.getProperties().containsKey(resizableFeatureKey)) {
NodeResizableHandlersHolder handlersHolder = new NodeResizableHandlersHolder(node);
}
}
/**
* Node resizeable code flow ends here
*/
}
|
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