package poe.resizer;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.event.EventType;
import javafx.scene.Cursor;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.stage.Stage;
public class ResizeHelper {
public static void addResizeListener(Stage stage) {
ResizeListener resizeListener = new ResizeListener(stage);
stage.getScene().addEventHandler(MouseEvent.MOUSE_MOVED, resizeListener);
stage.getScene().addEventHandler(MouseEvent.MOUSE_PRESSED, resizeListener);
stage.getScene().addEventHandler(MouseEvent.MOUSE_DRAGGED, resizeListener);
stage.getScene().addEventHandler(MouseEvent.MOUSE_EXITED, resizeListener);
stage.getScene().addEventHandler(MouseEvent.MOUSE_EXITED_TARGET, resizeListener);
ObservableList<Node> children = stage.getScene().getRoot().getChildrenUnmodifiable();
for (Node child : children) {
addListenerDeeply(child, resizeListener);
}
}
private static void addListenerDeeply(Node node, EventHandler<MouseEvent> listener) {
node.addEventHandler(MouseEvent.MOUSE_MOVED, listener);
node.addEventHandler(MouseEvent.MOUSE_PRESSED, listener);
node.addEventHandler(MouseEvent.MOUSE_DRAGGED, listener);
node.addEventHandler(MouseEvent.MOUSE_EXITED, listener);
node.addEventHandler(MouseEvent.MOUSE_EXITED_TARGET, listener);
if (node instanceof Parent) {
Parent parent = (Parent) node;
ObservableList<Node> children = parent.getChildrenUnmodifiable();
for (Node child : children) {
addListenerDeeply(child, listener);
}
}
}
private static class ResizeListener implements EventHandler<MouseEvent> {
private Stage stage;
private Cursor cursorEvent = Cursor.DEFAULT;
private int border = 4;
private double startX = 0;
private double startY = 0;
private double startScreenX = 0;
private double startScreenY = 0;
public ResizeListener(Stage stage) {
this.stage = stage;
}
@Override
public void handle(MouseEvent mouseEvent) {
EventType<? extends MouseEvent> mouseEventType = mouseEvent.getEventType();
Scene scene = stage.getScene();
double mouseEventX = mouseEvent.getSceneX();
double mouseEventY = mouseEvent.getSceneY();
double sceneWidth = scene.getWidth();
double sceneHeight = scene.getHeight();
if (MouseEvent.MOUSE_MOVED.equals(mouseEventType)) {
if (mouseEventX < border && mouseEventY < border) {
cursorEvent = Cursor.NW_RESIZE;
} else if (mouseEventX < border && mouseEventY > sceneHeight - border) {
cursorEvent = Cursor.SW_RESIZE;
} else if (mouseEventX > sceneWidth - border && mouseEventY < border) {
cursorEvent = Cursor.NE_RESIZE;
} else if (mouseEventX > sceneWidth - border && mouseEventY > sceneHeight - border) {
cursorEvent = Cursor.SE_RESIZE;
} else if (mouseEventX < border) {
cursorEvent = Cursor.W_RESIZE;
} else if (mouseEventX > sceneWidth - border) {
cursorEvent = Cursor.E_RESIZE;
} else if (mouseEventY < border) {
cursorEvent = Cursor.N_RESIZE;
} else if (mouseEventY > sceneHeight - border) {
cursorEvent = Cursor.S_RESIZE;
} else {
cursorEvent = Cursor.DEFAULT;
}
scene.setCursor(cursorEvent);
} else if (MouseEvent.MOUSE_EXITED.equals(mouseEventType) || MouseEvent.MOUSE_EXITED_TARGET.equals(mouseEventType)) {
scene.setCursor(Cursor.DEFAULT);
} else if (MouseEvent.MOUSE_PRESSED.equals(mouseEventType)) {
startX = stage.getWidth() - mouseEventX;
startY = stage.getHeight() - mouseEventY;
} else if (MouseEvent.MOUSE_DRAGGED.equals(mouseEventType)) {
if (!Cursor.DEFAULT.equals(cursorEvent)) {
if (!Cursor.W_RESIZE.equals(cursorEvent) && !Cursor.E_RESIZE.equals(cursorEvent)) {
double minHeight = stage.getMinHeight() > (border * 2) ? stage.getMinHeight() : (border * 2);
double maxHeight = stage.getMaxHeight();
if (Cursor.NW_RESIZE.equals(cursorEvent) || Cursor.N_RESIZE.equals(cursorEvent) || Cursor.NE_RESIZE.equals(cursorEvent)) {
double newHeight = stage.getHeight() - (mouseEvent.getScreenY() - stage.getY());
if (newHeight >= minHeight && newHeight <= maxHeight) {
stage.setHeight(newHeight);
stage.setY(mouseEvent.getScreenY());
} else {
newHeight = Math.min(Math.max(newHeight, minHeight), maxHeight);
// y1 + h1 = y2 + h2
// y1 = y2 + h2 - h1
stage.setY(stage.getY() + stage.getHeight() - newHeight);
stage.setHeight(newHeight);
}
} else {
stage.setHeight(Math.min(Math.max(mouseEventY + startY, minHeight), maxHeight));
}
}
if (!Cursor.N_RESIZE.equals(cursorEvent) && !Cursor.S_RESIZE.equals(cursorEvent)) {
double minWidth = stage.getMinWidth() > (border * 2) ? stage.getMinWidth() : (border * 2);
double maxWidth = stage.getMaxWidth();
if (Cursor.NW_RESIZE.equals(cursorEvent) || Cursor.W_RESIZE.equals(cursorEvent) || Cursor.SW_RESIZE.equals(cursorEvent)) {
double newWidth = stage.getWidth() - (mouseEvent.getScreenX() - stage.getX());
if (newWidth >= minWidth && newWidth <= maxWidth) {
stage.setWidth(newWidth);
stage.setX(mouseEvent.getScreenX());
} else {
newWidth = Math.min(Math.max(newWidth, minWidth), maxWidth);
// x1 + w1 = x2 + w2
// x1 = x2 + w2 - w1
stage.setX(stage.getX() + stage.getWidth() - newWidth);
stage.setWidth(newWidth);
}
} else {
stage.setWidth(Math.min(Math.max(mouseEventX + startX, minWidth), maxWidth));
}
}
}
}
if (MouseEvent.MOUSE_PRESSED.equals(mouseEventType)) {
startScreenX = mouseEvent.getScreenX();
startScreenY = mouseEvent.getScreenY();
} else if (MouseEvent.MOUSE_DRAGGED.equals(mouseEventType)) {
if (Cursor.DEFAULT.equals(cursorEvent) && !stage.isMaximized()) {
stage.setX(stage.getX() + mouseEvent.getScreenX() - startScreenX);
startScreenX = mouseEvent.getScreenX();
stage.setY(stage.getY() + mouseEvent.getScreenY() - startScreenY);
startScreenY = mouseEvent.getScreenY();
}
}
}
}
}
