ジョン：
ビデオの問題の。
問題1：左から任意JToolBarのドラッグに関係なく遠い右側Iのにドロップ位置に挿入されます。
問題2：映像に示すように変更なしで右最もJToolBarののどこにでも結果をドラッグします。
望ましい行動：私はJToolBarのは、私はにドロップしています2つの構成要素の間に挿入されますし、ドラッグされているしたいです。ビデオでは、私が最初に挿入した後、グリーンレッドブルーを期待しているだろう。私は、EclipseやVisual Studioがそのツールバーコンポーネントのために使用するのと同じ動作を実現しようとしています。私はこれをどのように達成することができますか？
ありがとうございました
package sudoku;
import java.awt.Color;
import javax.swing.BoxLayout;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JToolBar;
public class UIToolbar extends JPanel {
private static final long serialVersionUID = -5279534877002998610L;
private static JToolBar CreateToolBar(String name, Color color) {
JToolBar toolbar = new JToolBar();
toolbar.setBackground(color);
toolbar.setFloatable(true);
toolbar.add(new JLabel(name));
return toolbar;
}
public UIToolbar() {
super();
this.setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
this.add(CreateToolBar("label1", Color.red));
this.add(CreateToolBar("label2", Color.green));
this.add(CreateToolBar("label3", Color.blue));
}
}
編集：私は、Javaが単純にこの機能をサポートしていない可能性があります考えている、と私はおそらくちょうどそれを自分自身を実装する必要があります。
ジョン：
解決しよう！私は、既存のMouseListenerとJToolBarのののMouseMotionListenerをオーバーライドするUIToolBarContainerを実施しました。私も成分でのゴーストは、コンポーネントが挿入されようとしている場所の挿入バープレビューとともに、ドラッグ実装しました。ここにあるビデオのアクションで、それのは。私がこの動作を実現する必要がある他の誰に重宝願っています。乾杯。
package sudoku;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Component;
import java.awt.Composite;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.image.BufferedImage;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JToolBar;
import javax.swing.SwingUtilities;
public class UIToolBarContainer extends JPanel implements MouseListener, MouseMotionListener {
private static final long serialVersionUID = -5279534877002998610L;
private Point mouse;
private Point mouseClickOffset;
private Component dragged;
private BufferedImage draggedImage;
public UIToolBarContainer() {
super();
mouse = new Point(0, 0);
mouseClickOffset = new Point(0, 0);
dragged = null;
draggedImage = null;
this.setLayout(new FlowLayout(FlowLayout.LEFT));
this.add(createToolBar("label1", Color.red));
this.add(createToolBar("label2", Color.green));
this.add(createToolBar("label3", Color.cyan));
this.add(createToolBar("label4", Color.yellow));
}
private JToolBar createToolBar(String name, Color color) {
JToolBar toolbar = new JToolBar();
for (MouseListener listener : toolbar.getMouseListeners()) {
toolbar.removeMouseListener(listener);
}
for (MouseMotionListener listener : toolbar.getMouseMotionListeners()) {
toolbar.removeMouseMotionListener(listener);
}
toolbar.setLayout(new FlowLayout(FlowLayout.LEFT));
toolbar.setBackground(color);
toolbar.setFloatable(true);
toolbar.add(new JLabel(name));
toolbar.addMouseListener(this);
toolbar.addMouseMotionListener(this);
return toolbar;
}
/**
* Get the insertion index based on the closest mouse x position.
* @return positive index on success, negative index on failure.
*/
private int getInsertionIndex() {
if (getComponentCount() <= 1) {
return -1;
}
Component lastComponent = getComponent(getComponentCount() - 1);
Point last = SwingUtilities.convertPoint(lastComponent, 0, 0, this);
if (mouse.x > (last.x + lastComponent.getWidth() / 2)) {
return getComponentCount();
}
for (int i = 0; i < getComponentCount(); i++) {
Component component = getComponent(i);
Point position = SwingUtilities.convertPoint(component, 0, 0, this);
if (mouse.x < (position.x + component.getWidth() / 2)) {
return i;
}
}
return -2;
}
/**
* Get the position of the insertion for the preview.
* @param index the component index we will be inserting at.
* @return returns the location of the insertion preview, null if index is invalid.
*/
private Point getInsertionIndexLocation(int index, int offset) {
if (index < 0 || index > getComponentCount()) {
return null;
}
if (index == getComponentCount()) {
Component lastComponent = getComponent(getComponentCount() - 1);
Point position = SwingUtilities.convertPoint(lastComponent, 0, 0, this);
position.x += lastComponent.getWidth() + offset;
return position;
}
Component component = getComponent(index);
Point position = SwingUtilities.convertPoint(component, 0, 0, this);
position.x -= offset;
return position;
}
/**
* Generate an image of a given component with a given alpha, used for ghost effect when dragging.
* @param c the component to create an image of
* @param alpha the alpha amount to apply on the image
* @return an image of a given component
*/
public static BufferedImage GetComponentAsImage(Component c, float alpha) {
BufferedImage buffer = new BufferedImage(c.getWidth(), c.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = buffer.createGraphics();
int rule = AlphaComposite.SRC_OVER;
Composite comp = AlphaComposite.getInstance(rule, alpha);
g2d.setComposite(comp);
c.paintAll(g2d);
g2d.dispose();
return buffer;
}
@Override
protected void paintChildren(Graphics g) {
super.paintChildren(g);
if (dragged != null && draggedImage != null) {
int insertionIndex = getInsertionIndex();
Point insertionLocation = getInsertionIndexLocation(insertionIndex, 3);
if (insertionLocation != null) {
g.setColor(Color.black);
g.drawLine(
insertionLocation.x,
insertionLocation.y,
insertionLocation.x,
insertionLocation.y + getComponent(0).getHeight()
);
}
int x = mouse.x - mouseClickOffset.x;
int y = mouse.y - mouseClickOffset.y;
g.drawImage(draggedImage, x, y, null);
g.setColor(Color.gray);
g.drawRect(x, y, dragged.getWidth(), dragged.getHeight());
}
}
/**
* converts the mouse position from the relative child to the parent coordinate.
* @param e
*/
private void updateMouseLocation(MouseEvent e) {
mouse = SwingUtilities.convertPoint(e.getComponent(), e.getPoint(), this);
}
/**
* find the index of the component
* @param c the component we are trying to get the index
* @return returns the index, -1 if not found.
*/
private int getComponentIndex(Component c) {
for (int i = 0; i < getComponentCount(); i++) {
if (c == getComponent(i)) {
return i;
}
}
return -1;
}
@Override
public void mouseDragged(MouseEvent e) {
dragged = e.getComponent();
updateMouseLocation(e);
repaint();
}
@Override
public void mouseMoved(MouseEvent e) {
updateMouseLocation(e);
}
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
@Override
public void mousePressed(MouseEvent e) {
dragged = e.getComponent();
draggedImage = GetComponentAsImage(dragged, 0.5f);
updateMouseLocation(e);
mouseClickOffset = e.getPoint();
repaint();
}
@Override
public void mouseReleased(MouseEvent e) {
if (dragged != null && draggedImage != null) {
int insertionIndex = getInsertionIndex();
if (insertionIndex == getComponentCount()) {
remove(dragged);
add(dragged);
} else if (insertionIndex >= 0 && insertionIndex < getComponentCount()) {
int dragIndex = getComponentIndex(dragged);
if (dragIndex != insertionIndex) {
if (dragIndex > insertionIndex) {
// right to left
remove(dragged);
add(dragged, insertionIndex);
} else {
// left to right
remove(dragged);
add(dragged, insertionIndex - 1);
}
}
}
}
dragged = null;
draggedImage = null;
revalidate();
repaint();
}
}