Adding another movable image in Swing - swing

I have stumpled upon a problem. What I'm trying to do is to add another movable image in JPanel, movable as in that one could drag it with the mouse. This program only can view one image at the time and drag it arround. So how could I do to have more than one picture in my program?
=)
Here is my code:
import java.awt.*;
import javax.swing.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseAdapter;
public class test2 {
public static void main(String[] args) {
new test2();
}
public test2() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame();
Bild bild = new Bild();
frame.add(new DragMyIcon("katt.gif"));
frame.setSize(640,460);
frame.setVisible(true);
}
});
}
protected class DragMyIcon extends JPanel {
public static final long serialVersionUID = 172L;
private JLabel label;
public DragMyIcon(String path) {
setLayout(null);
ImageIcon icon = null;
icon = new ImageIcon(path);
label = new JLabel(icon);
label.setBounds(0,0,icon.getIconWidth(), icon.getIconHeight());
setBounds(0,0,icon.getIconWidth(), icon.getIconHeight());
label.setHorizontalAlignment(JLabel.CENTER);
label.setVerticalAlignment(JLabel.CENTER);
add(label);
MouseHandler handler = new MouseHandler();
label.addMouseListener(handler);
label.addMouseMotionListener(handler);
}
}
protected class MouseHandler extends MouseAdapter {
private boolean active = false;
private int xDisp;
private int yDisp;
#Override
public void mousePressed(MouseEvent e) {
active = true;
JLabel label = (JLabel) e.getComponent();
xDisp = e.getPoint().x - label.getLocation().x;
yDisp = e.getPoint().y - label.getLocation().y;
label.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
}
#Override
public void mouseReleased(MouseEvent e) {
active = false;
JLabel label = (JLabel) e.getComponent();
label.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
}
#Override
public void mouseDragged(MouseEvent e) {
if (active) {
JLabel label = (JLabel) e.getComponent();
Point point = e.getPoint();
label.setLocation(point.x - xDisp, point.y - yDisp);
label.invalidate();
label.repaint();
}
}
#Override
public void mouseMoved(MouseEvent e) {
}
}}

What I'm trying to do is to add another movable image in JPanel,
Where? I don't see any code?
You only add a single label to the panel. If you want to drag more than one then you need to add more than one label to the panel.
This program only can view one image at the time and drag it arround.
Well maybe you need a method like addImage(Image image, int x, int y). Then when you invoke this method you:
create a JLabel using the image for the Icon
set the bounds of the label using the x/y and the image size
add the listeners to the label
add the label to the panel

Related

Moving JavaFX Nodes Between Stages

I'm rewriting a Swing application in JavaFX, where I allow users to present multiple workspaces as either windows or tabs. However, my FX code will not display the contents moved from more than one tab into a new stage; only the contents of the currently-selected tab appear in my new stages. I've distilled my code into a small example below. Can anyone clue me in as to what's gone wrong?
package scenes;
import java.util.ArrayList;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
public class StageSwapper extends Application {
static public void main(String[] args) {
launch(args);
}
private TabPane tabs = new TabPane();
public void start(Stage stage) {
stage.setTitle("Stage Swapper");
BorderPane p = new BorderPane();
p.setCenter(tabs);
tabs.getTabs().addAll(new Swapee("First").createTab(), new Swapee("Second").createTab());
Scene s = new Scene(p);
stage.setScene(s);
stage.show();
launchSwap();
}
private void launchSwap() {
new Thread() {
public void run() {
try {
sleep(10000);
} catch (Exception e) {
e.printStackTrace();
}
Platform.runLater(new Runnable() {
public void run() {
for (Swapee s : Swapee.list) {
createWindow(s);
}
}
});
}
}.start();
}
public void createWindow(Swapee s) {
Stage window = new Stage();
window.setTitle("New Window");
window.setY(200);
window.setX(200);
BorderPane p = new BorderPane();
p.setCenter(s);
window.setScene(new Scene(p));
window.show();
}
}
class Swapee extends Label {
static private int count;
static ArrayList<Swapee> list = new ArrayList<>();
String name;
Swapee(String name) {
super("Swappable Item " + ++count);
this.name = name;
list.add(this);
}
Tab createTab() {
Tab t = new Tab(name);
t.setContent(this);
return t;
}
}
You haven't specified the size of the windows that you're creating. Right now they have width and length equal to 0. You may use the following approach:
BorderPane p = new BorderPane();
p.setPrefSize(Region.USE_COMPUTED_SIZE, Region.USE_COMPUTED_SIZE);
p.setCenter(s);
BorderPane will be resized according to its content and the window will be resized as well.

How to run a javaFX MediaPlayer in swing?

I've made a simple Media Player for an application I'm working on, the problem is that I thought that you could simply integrate JavaFX into Swing. Which is not the case. I have been searching for a solution to this problem and tried to use this website: http://docs.oracle.com/javafx/2/swing/jfxpub-swing.htm
The problem is that even though I have the website that explains how to put the code together, I still don't understand how. Here is the mediaplayer and I plan to integrate it into my Swing code, so that I can call the media player when a button is clicked. Here is all my code for the media player and if anyone can share some light on how to integrate it into my Swing code i.e my GUI, I would probably have to kiss you through the computer.
public class Player extends Application{
private boolean atEndOfMedia = false;
private final boolean repeat = false;
private boolean stopRequested = false;
private Duration duration;
private Label playTime;
private Slider volumeSlider;
#Override
public void start(final Stage stage) throws Exception {
stage.setTitle("Movie Player");//set title
Group root = new Group();//Group for buttons etc
final Media media = new Media("file:///Users/Paul/Downloads/InBruges.mp4");
final MediaPlayer playa = new MediaPlayer(media);
MediaView view = new MediaView(playa);
//Slide in and out and what causes that.
final Timeline slideIn = new Timeline();
final Timeline slideOut = new Timeline();
root.setOnMouseEntered(new javafx.event.EventHandler<javafx.scene.input.MouseEvent>() {
#Override
public void handle(MouseEvent t) {
slideIn.play();
}
});
root.setOnMouseExited(new javafx.event.EventHandler<javafx.scene.input.MouseEvent>() {
#Override
public void handle(MouseEvent t) {
slideOut.play();
}
});
final VBox vbox = new VBox();
final Slider slider = new Slider();
final Button playButton = new Button("|>");
root.getChildren().add(view);
root.getChildren().add(vbox);
vbox.getChildren().add(slider);
vbox.getChildren().add(playButton);
vbox.setAlignment(Pos.CENTER);
Scene scene = new Scene(root, 400, 400, Color.BLACK);
stage.setScene(scene);
stage.show();
// Play/Pause Button
playButton.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent e) {
Status status = playa.getStatus();
if (status == Status.UNKNOWN || status == Status.HALTED)
{
// don't do anything in these states
return;
}
if ( status == Status.PAUSED
|| status == Status.READY
|| status == Status.STOPPED)
{
// rewind the movie if we're sitting at the end
if (atEndOfMedia) {
playa.seek(playa.getStartTime());
atEndOfMedia = false;
}
playa.play();
} else {
playa.pause();
}
}
});
//Listeners and Shit for Play Button
playa.setOnPlaying(new Runnable() {
#Override
public void run() {
if (stopRequested) {
playa.pause();
stopRequested = false;
} else {
playButton.setText("||");
}
}
});
playa.setOnPaused(new Runnable() {
#Override
public void run() {
playButton.setText(">");
}
});
playa.play();
playa.setOnReady(new Runnable() {
#Override
public void run(){
int v = playa.getMedia().getWidth();
int h = playa.getMedia().getHeight();
stage.setMinWidth(v);
stage.setMinHeight(h);
vbox.setMinSize(v, 100);
vbox.setTranslateY(h-50);
//slider and graphical slide in/out
slider.setMin(0.0);
slider.setValue(0.0);
slider.setMax(playa.getTotalDuration().toSeconds());
slideOut.getKeyFrames().addAll(
new KeyFrame(new Duration(0),
new KeyValue(vbox.translateYProperty(), h-100),
new KeyValue(vbox.opacityProperty(), 0.9)
),
new KeyFrame(new Duration(300),
new KeyValue(vbox.translateYProperty(), h),
new KeyValue(vbox.opacityProperty(), 0.0)
)
);
slideIn.getKeyFrames().addAll(
new KeyFrame(new Duration(0),
new KeyValue(vbox.translateYProperty(), h),
new KeyValue(vbox.opacityProperty(), 0.0)
),
new KeyFrame(new Duration(300),
new KeyValue(vbox.translateYProperty(), h-100),
new KeyValue(vbox.opacityProperty(), 0.9)
)
);
}
});
//Slider being current and ability to click on slider.
playa.currentTimeProperty().addListener(new ChangeListener<Duration>(){
#Override
public void changed(ObservableValue<? extends Duration> observableValue, Duration duration, Duration current){
slider.setValue(current.toSeconds());
}
});
slider.setOnMouseClicked(new javafx.event.EventHandler<javafx.scene.input.MouseEvent>() {
#Override
public void handle(javafx.scene.input.MouseEvent t) {
playa.seek(Duration.seconds(slider.getValue()));
}
});
}
Use JFXPanel:
public class Test {
private static void initAndShowGUI() {
// This method is invoked on Swing thread
JFrame frame = new JFrame("FX");
final JFXPanel fxPanel = new JFXPanel();
frame.add(fxPanel);
frame.setVisible(true);
Platform.runLater(new Runnable() {
#Override
public void run() {
initFX(fxPanel);
}
});
}
private static void initFX(JFXPanel fxPanel) {
// This method is invoked on JavaFX thread
Scene scene = createScene();
fxPanel.setScene(scene);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
initAndShowGUI();
}
});
}
}
where method createScene() is start(final Stage stage) from your code.
Just instead of putting scene to stage you return it.

Highlight Text In JTextArea In Presence of Duplicate Lines

I have a JTextArea which consists of lines (some of them possibly duplicates of one another). I've a requirement where I've to highlight the selected line upon right-click. The code that I'm using to highlight is as follows:
String highlightedText = textArea.getSelectedText();
if(highlightedText != null)
{
try{
int index = textArea.getText().indexOf(highlightedText, textArea.getCaretPosition());
textArea.getHighlighter().addHighlight(index - 1, index + highlightedText.length(),
new DefaultHighlighter.DefaultHighlightPainter(Color.ORANGE));
}catch (BadLocationException ex) {
}
}
While the highlight upon right-click works, the problem is I cannot get the index of the selected line in the presence of duplicates. So if there're lines like
AAAA
BBBB
AAAA
CCCC
DDDD
AAAA
I cannot get the index of the second "AAAA" when the user tries to highlight this particular line. Can someone help me out with an idea/suggestion to work this this? Thanks!
You had it almost all by yourself there were few issues though.
You should use getSelectionStart() rather than getCaretPosition().
Highlight should start from index not from index-1.
Please see the example below. Select what you want to highlight right click on the textArea or press the button to highlight your selection:
public class HighlightingTextArea {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
final JTextArea textArea = new JTextArea(10, 44);
textArea.append("AAAA\nBBBB\nAAAA\nCCCC\nDDDD\nAAAA");
JButton b = new JButton(new AbstractAction("highlight") {
#Override
public void actionPerformed(ActionEvent e) {
highlightTextAreaSelection(textArea);
}
});
textArea.addMouseListener(new MouseAdapter() {
#Override
public void mousePressed(MouseEvent e) {
super.mousePressed(e);
if (e.getButton() == MouseEvent.BUTTON3) {
highlightTextAreaSelection(textArea);
}
}
});
JPanel panel = new JPanel(new BorderLayout());
panel.add(textArea);
panel.add(b, BorderLayout.SOUTH);
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setContentPane(panel);
f.pack();
f.setVisible(true);
}
});
}
private static void highlightTextAreaSelection(JTextArea textArea) {
String highlightedText = textArea.getSelectedText();
if (highlightedText != null) {
try {
int index = textArea.getText().indexOf(highlightedText, textArea.getSelectionStart());
textArea.getHighlighter().addHighlight(index, index + highlightedText.length(),
new DefaultHighlighter.DefaultHighlightPainter(Color.ORANGE));
} catch (BadLocationException ex) {
}
}
}
}

Draw custom stuff on top of opaque components in a JPanel

I have an JPanel populated with several opaque custom components. Now I would like to draw something on top of these components by overriding the paintComponent() method. My problem is that the painted stuff is placed behind the embedded components and, as they are opaque, is covered by them.
Is there any way to let the painting appear on top of the components?
Here's a short example of what I'm trying to do:
public class DrawOnTop {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
JFrame f = new JFrame("Draw on top");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new MyPanel());
f.pack();
f.setVisible(true);
}
});
}
}
class MyPanel extends JPanel {
public MyPanel() {
setLayout(new BorderLayout(3, 3));
add(new JButton("Button 1"), BorderLayout.NORTH);
add(new JButton("Button 2"), BorderLayout.CENTER);
}
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(Color.red);
g.drawLine(0, 0, getVisibleRect().width, getVisibleRect().height);
}
}
You were thinking along the right lines.
Only problem was that you should have Overridden the paintChildren() method like in the code below. This is because the paintComponent() method is called as first and does the background etc painting of the component itself (the MyPanel), then is called paintBorders() and lastly the paintChildren() which paints all that is inside of the component calling it.
public class DrawOnTop {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
JFrame f = new JFrame("Draw on top");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new MyPanel());
f.pack();
f.setVisible(true);
}
});
}
}
class MyPanel extends JPanel {
public MyPanel() {
setLayout(new BorderLayout(3, 3));
JButton b1 = new JButton("Button 1");
MouseListener ml = new MouseAdapter() {
#Override
public void mouseExited(MouseEvent e) {
super.mouseExited(e);
MyPanel.this.repaint();
}
};
b1.addMouseListener(ml);
JButton b2 = new JButton("Button 2");
b2.addMouseListener(ml);
add(b1, BorderLayout.NORTH);
add(b2, BorderLayout.CENTER);
}
#Override
protected void paintChildren(Graphics g) {
super.paintChildren(g);
g.setColor(Color.red);
g.drawLine(0, 0, getVisibleRect().width, getVisibleRect().height);
}
}
Important to notice, in the code sample, that I added also a MouseListener to repaint the panel when a mouse exits a button, otherwise the buttons would always stay over the line once mouse enters over one of them.
But if you want to have a custom painting that is always on top of your components then I would suggest to use a glass pane. Examples of a glass pane use are provided here:
Simple one.
A more complex one.

JPopupMenu doesn't dissapear/move when minimising/moving the JFrame it is in

I am making an mp3 player, with several JLists in my JFrame. When I right click on a JList item, a popup with some options for that song appears. But when this popup is visible, and I minimise my JFrame, this popup stays visible! Also, when the popup is visible, and I drag my JFrame to somewhere else on the screen, the popup stays on it's original position (so it does not stay on the same position relative to the JFrame)... Can someone please help me out with this? I tried to strip down this class as much as possible :)
I would be really grateful if someone could help me out !!
Joe
public class playListPanel extends JPanel implements MouseListener {
private DefaultListModel model;
private Interface interFace;
private JList list;
private boolean emptyPlaylist;
private ArrayList<Song> currentPlayList;
private Song rightClickedSong;
private JPopupMenu popup;
private Point panelLocation;
public playListPanel(Interface interFace) // Interface extends JFrame,
// playListPanel is a part of
// this JFrame.
{
this.interFace = interFace;
this.panelLocation = new Point(559, 146);
setBackground(SystemColor.controlHighlight);
setBorder(new TitledBorder(null, "", TitledBorder.LEADING,
TitledBorder.TOP, null, null));
setBounds((int) panelLocation.getX(), (int) panelLocation.getY(), 698,
368);
setLayout(null);
currentPlayList = new ArrayList<Song>();
model = new DefaultListModel();
list = new JList(model);
list.setVisible(true);
list.addMouseListener(this);
JScrollPane scrollPane = new JScrollPane(list);
scrollPane.setBounds(5, 5, 688, 357);
add(scrollPane);
emptyPlaylist = true;
}
private void openMenuPopup(Point point)
{
removePopup();
popup = new JPopupMenu();
int x = (int) point.getX();
int y = (int) point.getY();
popup.setLocation((int) (x+panelLocation.getX()),(int) (y+panelLocation.getY()));
//popup.setLabel("popup voor playlist");
JMenuItem removeSong;
popup.add(removeSong = new JMenuItem("Remove Song from Playlist", new ImageIcon("image.jpg")));
ActionListener menuListener = new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
if(event.getActionCommand().equals("Remove Song from Playlist"))
{
System.out.println("Remove Song from Playlist");
interFace.getPlaylistManager().removeOneSong(rightClickedSong);
removePopup();
}
};
//ADD THE LISTENERS TO THE MENU ITEMS
removeSong.addActionListener(menuListener);
popup.setVisible(true);
}
public void removePopup()
{
if(popup!==null)
{
popup.setVisible(false);
System.out.println("popup removed");
}
}
private int getRow(Point point) {
return list.locationToIndex(point);
}
public void refreshPlayList(ArrayList<Song> playlist) {
this.currentPlayList = playlist;
model.clear();
for (Song song : playlist) {
model.add(model.getSize(), song.getPlaylistString());
}
list.setVisible(true);
}
public void highlightSong(int index) {
list.setSelectedIndex(index);
}
public int getRowOfList(Point point) {
return list.locationToIndex(point);
}
#Override
public void mouseClicked(MouseEvent e) {
interFace.getPlaylistManager().doubleClickOnPlaylist(e);
}
#Override
public void mouseEntered(MouseEvent arg0) {
}
#Override
public void mouseExited(MouseEvent arg0) {
}
#Override
public void mousePressed(MouseEvent e) {
if (SwingUtilities.isRightMouseButton(e)) {
rightClickedSong = currentPlayList.get(getRow(e.getPoint()));
openMenuPopup(e.getPoint());
System.out.println("should open popup at "
+ e.getPoint().toString());
}
}
#Override
public void mouseReleased(MouseEvent arg0) {
}
}
There are some basic flaws in the way you are handling click for showing popup.
It is not advisable to call popup.setVisible in simple scenarios like this. Instead, you may rely on its default behavior. Also, better to use e.isPopupTrigger() than to check SwingUtilities.isRightMouseButton(e) to show popup.
You may do something like the following :
//at classlevel,
private JPopupMenu popup = new JPopupMenu();
//create a Popuplistener
PopupListener pl = new PopupListener();
list.addMouseListener(pl);
//Implementation of your popuplistener
class PopupListener extends MouseAdapter {
public void mousePressed(MouseEvent e) {
maybeShowPopup(e);
}
public void mouseReleased(MouseEvent e) {
maybeShowPopup(e);
}
private void maybeShowPopup(MouseEvent e) {
if (e.isPopupTrigger())
//e.getSource - and construct your popup as required.
//and then.
popup.show(((JApplet) e.getComponent()).getContentPane(), e
.getX(), e.getY());
}
}