Niedawno zbudowałem mój własny prototyp tego . Może okaże się to przydatne.
Wykorzystuje 2 różne komponenty jeden na drugim. W przeciwieństwie do Rob Camick's ComponentResizer, na której jest to zainspirowane, detektory myszy ustawione na komponenty w ramce JFrame będą działać. Nie dostaniesz JFrame do przechwytywania wszystkich zdarzeń myszy, co czyni bezużytecznym dołączanie słuchaczy do komponentów JFrame. Przechwytuje zdarzenia myszy tylko wtedy, gdy musi być wyświetlona podwójna strzałka.
Kluczem jest to metoda w górnym komponentu:
@Override
public boolean contains(int x, int y) {
return x < insets.left || y < insets.top
|| getHeight() - y < insets.bottom
|| getWidth() - x < insets.right;
}
Oto kod:
import java.awt.Component;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
public class BackgroundComponentDragger implements MouseMotionListener {
private Component controlledComponent;
/*
* Point where cursor was last clicked.
*/
private Point originPoint;
public BackgroundComponentDragger(Component component) {
this.controlledComponent = component;
}
@Override
public void mouseDragged(MouseEvent e) {
Point currentFramePosition = controlledComponent.getLocation();
Point newFramePosition = new Point(currentFramePosition.x + e.getX()
- originPoint.x, currentFramePosition.y + e.getY() - originPoint.y);
controlledComponent.setLocation(newFramePosition);
}
@Override
public void mouseMoved(MouseEvent e) {
originPoint = e.getPoint();
}
}
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.util.HashMap;
import java.util.Map;
public class ComponentBorderDragger implements MouseMotionListener {
private Component controlledComponent;
private byte direction;
protected static final byte NORTH = 1;
protected static final byte WEST = 2;
protected static final byte SOUTH = 4;
protected static final byte EAST = 8;
private Cursor sourceCursor;
private static Map<Byte, Integer> cursors = new HashMap<Byte, Integer>();
{
cursors.put((byte) 1, Cursor.N_RESIZE_CURSOR);
cursors.put((byte) 2, Cursor.W_RESIZE_CURSOR);
cursors.put((byte) 4, Cursor.S_RESIZE_CURSOR);
cursors.put((byte) 8, Cursor.E_RESIZE_CURSOR);
cursors.put((byte) 3, Cursor.NW_RESIZE_CURSOR);
cursors.put((byte) 9, Cursor.NE_RESIZE_CURSOR);
cursors.put((byte) 6, Cursor.SW_RESIZE_CURSOR);
cursors.put((byte) 12, Cursor.SE_RESIZE_CURSOR);
}
private Insets dragInsets;
private Dimension minSize;
private Point basePoint;
public ComponentBorderDragger(Component controlledComponent, Insets dragInsets,
Dimension minSize) {
super();
this.controlledComponent = controlledComponent;
this.dragInsets = dragInsets;
this.minSize = minSize;
}
@Override
public void mouseDragged(MouseEvent e) {
if (direction == 0) {
return;
}
Point newPoint = e.getPoint();
int x, y, width, height, newBasePointX, newBasePointY;
x = controlledComponent.getX();
y = controlledComponent.getY();
width = controlledComponent.getWidth();
height = controlledComponent.getHeight();
newBasePointX = newPoint.x;
newBasePointY = newPoint.y;
if ((direction & EAST) == EAST) {
int newWidth;
newWidth = Math.max(minSize.width, width + newPoint.x
- basePoint.x);
width = newWidth;
}
if ((direction & SOUTH) == SOUTH) {
int novoAlto;
novoAlto = Math.max(minSize.height, height + newPoint.y
- basePoint.y);
height = novoAlto;
}
if ((direction & WEST) == WEST) {
int newWidth, newX;
newWidth = Math.max(minSize.width, width - newPoint.x
+ basePoint.x);
newX = Math.min(x + width - minSize.width, x + newPoint.x
- basePoint.x);
// Changing coordenates of new base point to refer to the new component position
newBasePointX -= newX - x;
x = newX;
width = newWidth;
}
if ((direction & NORTH) == NORTH) {
int newHeigth, newY;
newHeigth = Math.max(minSize.height, height - newPoint.y
+ basePoint.y);
newY = Math.min(y + height - minSize.height, y + newPoint.y
- basePoint.y);
// Changing coordenates of new base point to refer to the new component position
newBasePointY -= newY - y;
y = newY;
height = newHeigth;
}
controlledComponent.setBounds(x, y, width, height);
basePoint = new Point(newBasePointX, newBasePointY);
}
@Override
public void mouseMoved(MouseEvent e) {
Component originator = e.getComponent();
if (direction == 0) {
sourceCursor = originator.getCursor();
}
calculateDirection(e.getPoint(), e.getComponent().getSize());
setCursor(e.getComponent());
basePoint = e.getPoint();
}
private void setCursor(Component component) {
if (direction == 0) {
component.setCursor(sourceCursor);
} else {
int cursorType = cursors.get(direction);
Cursor cursor = Cursor.getPredefinedCursor(cursorType);
component.setCursor(cursor);
}
}
private void calculateDirection(Point point, Dimension componentSize) {
direction = 0;
if (point.x < dragInsets.left) {
direction |= WEST;
}
if (point.y < dragInsets.top) {
direction |= NORTH;
}
if (point.x > componentSize.width - dragInsets.right) {
direction |= EAST;
}
if (point.y > componentSize.height - dragInsets.bottom) {
direction |= SOUTH;
}
}
}
import java.awt.Insets;
import javax.swing.JComponent;
public class FrameComponent extends JComponent {
private static final long serialVersionUID = 3383070502274306213L;
private Insets insets;
@Override
public boolean contains(int x, int y) {
return x < insets.left || y < insets.top || getHeight() - y < insets.bottom || getWidth() - x < insets.right;
}
public FrameComponent(Insets insets) {
this.insets = insets;
}
}
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class GUI {
private JFrame compoundFrame;
private JPanel backgroundPanel;
Dimension gUISize = new Dimension(400, 400);
public GUI() {
buildResizeableFrame();
}
public void activate() {
compoundFrame.setVisible(true);
}
private void buildResizeableFrame() {
compoundFrame = new JFrame();
FrameComponent frame = new FrameComponent(new Insets(5, 5, 5, 5));
backgroundPanel = new JPanel();
compoundFrame.setLayout(null);
compoundFrame.add(frame);
compoundFrame.add(backgroundPanel);
setFrameSizeController(frame, backgroundPanel);
setFrameController(frame);
setBackgroundPanelController(backgroundPanel);
Dimension dimPant = Toolkit.getDefaultToolkit().getScreenSize();
compoundFrame.setBounds(dimPant.width/4, dimPant.height/4, dimPant.width/2, dimPant.height/2);
compoundFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
compoundFrame.setUndecorated(true);
}
private void setFrameSizeController(FrameComponent frame, JPanel panel) {
compoundFrame.addComponentListener(new ComponentAdapter() {
@Override
public void componentResized(ComponentEvent e) {
Dimension sizeIn = ((JFrame) e.getComponent()).getContentPane().getSize();
frame.setSize(sizeIn);
panel.setSize(sizeIn);
}
});
}
private void setFrameController(FrameComponent frame) {
ComponentBorderDragger controller = new ComponentBorderDragger(compoundFrame,
new Insets(5, 5, 5, 5), new Dimension(10, 10));
frame.addMouseMotionListener(controller);
}
private void setBackgroundPanelController(JPanel panel) {
panel.addMouseMotionListener(new BackgroundComponentDragger(compoundFrame));
}
public static void main(String[] args) {
new GUI().activate();
}
}
Uwaga: Ten kod ustawia null LayoutManager i słuchacza do pojemnika, aby zmienić rozmiar komponent wewnętrzny w razie potrzeby. Ta praktyka jest odradzana. Ta logika powinna zostać przeniesiona do niestandardowego menedżera układu.
Dziękuję bardzo. Spróbuję tego i oznaczę jako ans po testowaniu, gdy czas pozwoli (rozwijając inne części progu teraz). – user3635998
Świetne, awt i swing to o wiele więcej niż myślę. – Gearon
Dziękuję bardzo za pomoc, przetestowałem ją i działa bardzo dobrze. – user3635998