我很感兴趣如何使用鼠标拖动来调整此组件的大小：
VBox stackedTitledPanes = createStackedTitledPanes();
ScrollPane scroll = makeScrollable(stackedTitledPanes);
TabPane tabPane = new TabPane();
BorderPane mainPane = new BorderPane();
tabPane.setStyle("-fx-font-size: 12pt;"); // Set global size for the font
// Create Tabs
Tab tabA = new Tab();
tabA.setText("Main Component");
tabA.setStyle("-fx-font-size: 12pt;"); // Set size of the tab name
// Add something in Tab
StackPane tabA_stack = new StackPane();
tabA_stack.setAlignment(Pos.CENTER);
tabA_stack.getChildren().add(scroll);
tabA.setContent(tabA_stack);
tabPane.getTabs().add(tabA);
Tab tabB = new Tab();
tabB.setText("Second Component");
tabB.setStyle("-fx-font-size: 12pt;"); // Set size of the tab name
// Add something in Tab
StackPane tabB_stack = new StackPane();
tabB_stack.setAlignment(Pos.CENTER);
tabB_stack.getChildren().add(new Label("Label@Tab B"));
tabB.setContent(tabB_stack);
tabPane.getTabs().add(tabB);
Tab tabC = new Tab();
tabC.setText("Last Component");
tabC.setStyle("-fx-font-size: 12pt;"); // Set size of the tab name
// Add something in Tab
StackPane tabC_vBox = new StackPane();
tabC_vBox.setAlignment(Pos.CENTER);
tabC_vBox.getChildren().add(new Label("Label@Tab C"));
tabC.setContent(tabC_vBox);
tabPane.getTabs().add(tabC);
mainPane.setCenter(tabPane);
mainPane.setPrefSize(395, 580);
mainPane.setLayoutX(850);
mainPane.setLayoutY(32);
scroll.setPrefSize(395, 580);
scroll.setLayoutX(850);
scroll.setLayoutY(32);
root.getChildren().add(mainPane);
问题在于我在主舞台上放置了几个组件。当我调整一个组件的大小时，例如增加组件的高度，我必须减小下一个组件的大小而不跨越组件。我怎么能这样做？
答案 0 :(得分：5)
我认为它是导致问题的堆栈窗格，它不支持像VBox或HBox那样的调整大小行为。我正在拖动我自己的程序来调整TextArea或List组件的大小，以便在必要时使它们更大。看看这里的代码：
和用法：
编辑我已经取消了EstiMate，但是这个要点中的阻力调整器仍然是开源的。
https://gist.github.com/andytill/4369729
或完整代码。
import javafx.event.EventHandler;
import javafx.scene.Cursor;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Region;
/**
* {@link DragResizer} can be used to add mouse listeners to a {@link Region}
* and make it resizable by the user by clicking and dragging the border in the
* same way as a window.
* <p>
* Only height resizing is currently implemented. Usage: <pre>DragResizer.makeResizable(myAnchorPane);</pre>
*
* @author atill
*
*/
public class DragResizer {
/**
* The margin around the control that a user can click in to start resizing
* the region.
*/
private static final int RESIZE_MARGIN = 5;
private final Region region;
private double y;
private boolean initMinHeight;
private boolean dragging;
private DragResizer(Region aRegion) {
region = aRegion;
}
public static void makeResizable(Region region) {
final DragResizer resizer = new DragResizer(region);
region.setOnMousePressed(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
resizer.mousePressed(event);
}});
region.setOnMouseDragged(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
resizer.mouseDragged(event);
}});
region.setOnMouseMoved(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
resizer.mouseOver(event);
}});
region.setOnMouseReleased(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
resizer.mouseReleased(event);
}});
}
protected void mouseReleased(MouseEvent event) {
dragging = false;
region.setCursor(Cursor.DEFAULT);
}
protected void mouseOver(MouseEvent event) {
if(isInDraggableZone(event) || dragging) {
region.setCursor(Cursor.S_RESIZE);
}
else {
region.setCursor(Cursor.DEFAULT);
}
}
protected boolean isInDraggableZone(MouseEvent event) {
return event.getY() > (region.getHeight() - RESIZE_MARGIN);
}
protected void mouseDragged(MouseEvent event) {
if(!dragging) {
return;
}
double mousey = event.getY();
double newHeight = region.getMinHeight() + (mousey - y);
region.setMinHeight(newHeight);
y = mousey;
}
protected void mousePressed(MouseEvent event) {
// ignore clicks outside of the draggable margin
if(!isInDraggableZone(event)) {
return;
}
dragging = true;
// make sure that the minimum height is set to the current height once,
// setting a min height that is smaller than the current height will
// have no effect
if (!initMinHeight) {
region.setMinHeight(region.getHeight());
initMinHeight = true;
}
y = event.getY();
}
}
答案 1 :(得分：0)
这是上部和下部区域的修改版本。如果一个区域增长，则另一个区域变小。
public class DragResizer {
/**
* The margin around the control that a user can click in to start resizing
* the region.
*/
private static final int RESIZE_MARGIN = 5;
private final Region top, bottom;
private double y;
private boolean initMinHeight;
private boolean dragging;
private double ySum;
private DragResizer(Region top, Region bottom) {
this.top = top;
this.bottom = bottom;
ySum = top.getPrefHeight() + bottom.getPrefHeight();
}
public static void makeResizable(Region top, Region bottom) {
final DragResizer resizer = new DragResizer(top, bottom);
top.setOnMousePressed(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
resizer.mousePressed(event);
}});
top.setOnMouseDragged(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
resizer.mouseDragged(event);
}});
top.setOnMouseMoved(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
resizer.mouseOver(event);
}});
top.setOnMouseReleased(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
resizer.mouseReleased(event);
}});
}
protected void mouseReleased(MouseEvent event) {
dragging = false;
top.setCursor(Cursor.DEFAULT);
}
protected void mouseOver(MouseEvent event) {
if(isInDraggableZone(event) || dragging) {
top.setCursor(Cursor.S_RESIZE);
}
else {
top.setCursor(Cursor.DEFAULT);
}
}
protected boolean isInDraggableZone(MouseEvent event) {
return event.getY() > (top.getHeight() - RESIZE_MARGIN);
}
protected void mouseDragged(MouseEvent event) {
if(!dragging) {
return;
}
double mousey = event.getY();
double dy = (mousey - y);
if(top.getMinHeight() + dy >= ySum || bottom.getPrefHeight() - dy >= ySum)
return;
top.setMinHeight(top.getMinHeight() + dy);
top.setPrefHeight(top.getPrefHeight() + dy);
bottom.setMinHeight(bottom.getMinHeight() - dy);
bottom.setPrefHeight(bottom.getPrefHeight() - dy);
y = mousey;
}
protected void mousePressed(MouseEvent event) {
// ignore clicks outside of the draggable margin
if(!isInDraggableZone(event)) {
return;
}
dragging = true;
// make sure that the minimum height is set to the current height once,
// setting a min height that is smaller than the current height will
// have no effect
if (!initMinHeight) {
top.setMinHeight(top.getHeight());
initMinHeight = true;
}
y = event.getY();
}
}