motress zlting

Rob Camick wrote:Custom Painting Approaches shows a couple of different ways. It draws a Rectangle but you can change it to paint a dot. It draws on a JPanel but you can change it to draw on a JLabel with an ImageIcon.

But, for first time i clicked on image, it get coordinate and draw a red dot, for the second times after i clicked, the first dot should remain at there...
I don't don know where should i place those coding......
After i moved my mouse, that dot dissapear....
Help me take a look at my coding....Thanks...

import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.awt.event.MouseMotionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.awt.image.BufferedImage; import java.io.*; import java.util.ArrayList; import contour.FileRead; import javax.imageio.ImageIO; import javax.swing.*; import org.eclipse.swt.graphics.GC; public class ImageBuffer extends JPanel implements MouseListener, MouseMotionListener{ int mouse_x, mouse_y, x,y; String modifierKeys = ""; BufferedImage image; Dimension size = new Dimension(); // @jve:decl-index=0: String imgFile; private String dir = null; int amt_input=0; int radius =20; public ImageBuffer (BufferedImage image) { this.image = image; size.setSize(image.getWidth(), image.getHeight()); this.addMouseListener(this); this.addMouseMotionListener(this); } protected void paintComponent(Graphics g){ super.paintComponent(g); int x = (getWidth() - size.width)/2; int y = (getHeight() - size.height)/2; g.drawImage(image, x, y, this); g.setColor(Color.black); g.drawString("ID : 00:24:c3:31:2b:e0", 730, 175); g.setColor(Color.red); g.drawString("User at coordinate : (" + mouse_x + "," + mouse_y + ")", mouse_x, mouse_y); g.setColor(Color.blue); g.fillOval(mouse_x, mouse_y, 10, 10); g.drawOval(mouse_x, mouse_y, 10, 10); } public static void main(String[] args) throws IOException { SwingUtilities.invokeLater(new Runnable() { public void run() { new ImageBuffer(); } }); } public ImageBuffer () { try{ Init(); } catch(Exception e){ e.printStackTrace(); } } private void Init() throws Exception { JFrame frame = new JFrame(); frame.setTitle("Picture"); frame.setSize(200, 200); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setResizable(false); MenuBar menuBar = new MenuBar(); Menu menu = new Menu("File"); menu.add("Image"); menu.add("Quit"); menuBar.add(menu); menu.addActionListener(new axnListener()); frame.setMenuBar(menuBar); frame.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e) { System.exit(0); } }); frame.setVisible(true); }//end init public void loadImage() { JFrame choose = new JFrame(); FileDialog dlg = new FileDialog(choose, "Choose Image", FileDialog.LOAD); //set current directory if(dir != null){ dlg.setDirectory(dir); } dlg.setVisible(true); //get image name and path imgFile = dlg.getDirectory()+dlg.getFile(); dir = dlg.getDirectory(); //create image using filename try { image = ImageIO.read(new File(imgFile)); } catch (IOException e) { e.printStackTrace(); } ImageBuffer test = new ImageBuffer(image); JFrame f = new JFrame(); f.setTitle("Viewer"); f.add(new JScrollPane(test)); f.setVisible(true); Insets insets = f.getInsets(); f.setSize(image.getWidth()+insets.left+insets.right+1, image.getHeight()+insets.top+insets.bottom+1); f.setResizable(false); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }//end load image class axnListener implements ActionListener{ public void actionPerformed(ActionEvent e){ if(e.getActionCommand().equalsIgnoreCase("Image")){ loadImage(); } else System.exit(0); } }//end of inner class axnListener void setInfo(MouseEvent e) { // set up the information about event for display mouse_x = e.getX(); mouse_y = e.getY(); modifierKeys = ""; if (e.isShiftDown()) modifierKeys += "Shift "; if (e.isControlDown()) modifierKeys += "Control "; if (e.isMetaDown()) modifierKeys += "Meta "; if (e.isAltDown()) modifierKeys += "Alt"; this.repaint(); } private void printtextfile(){ PrintWriter pw = null; try { // created as a separate variable to emphasize that I'm appending to this file boolean append = true; pw = new PrintWriter(new FileWriter(new File("C:\\Documents and Settings\\Administrator\\My Documents\\lll.txt"), append)); // a print writer gives you many more methods to write with pw.println(mouse_x); pw.println(mouse_y); } catch (IOException e) { e.printStackTrace(); // deal with the exception } finally { pw.close(); } } public void drawCircle(int x, int y) { Graphics g = getGraphics(); g.drawOval(x - radius , y - radius, 2 * radius, 2 * radius); g.setColor(Color.BLACK); g.fillOval(x - radius, y - radius, 2 * radius, 2 * radius); } @Override public void mouseClicked(MouseEvent e ) { int radius = 20; amt_input++; mouse_x = e.getX(); mouse_y = e.getY(); System.out.println("mouse clicked "+amt_input); System.out.println( mouse_x + "," + mouse_y ); printtextfile(); FileChooserDemo.createAndShowGUI(); } @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mousePressed(MouseEvent e) { x = e.getX(); y = e.getY(); drawCircle(e.getX()-(radius/2), e.getY()-(radius/2)); } @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseDragged(MouseEvent e) { // TODO Auto-generated method stub } @Override public void mouseMoved(MouseEvent e) { setInfo(e); } }

Michael Dunn wrote:in your mousePressed/Clicked code:
you update some variables with the coordinates from the mouseEvent
call repaint()

in paintComponent:
draw the red dot using the info from the (above) variables

> I also need to save and show the coordinate where i clicked.
save where? in a file - you should be able to do that
show where? a JLabel? - just update the label's text with the coords (can be done from mousePressed/Clicked)

I still cannot draw a red dot on image after i clicked .... Can tell me where i supposed to add the coding and what coding suppose to add ?

The bottom is my coordinate text file, how can i split them and store using variables x1=194,y1=272 ,x2=318,y2=270 and so on.....

(194,272)
(318,270)
(321,349)
(144,206)
(411,339)
(209,384)

How can i save each coordinate everytime i clicked ?

Maybe i need to start with easier part.
I want to start with this simple part.
How can i click on an buffered image and print out the coordinate ?

Ulf Dittmer wrote:

but cannot work .....

Why not? How did you do it, and what happened?

i have combine 2 file, but the label keeps printing the coordinate on that image when mouse moved.
I don't want the label to print coordinate on image, i just want to print it in console.....How can i do this ? Help me take a look.

import java.awt.*; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import java.awt.geom.*; import java.awt.image.BufferedImage; import java.io.*; import javax.imageio.ImageIO; import javax.swing.*; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Frame; import java.awt.Graphics; import java.awt.Image; import java.awt.Insets; import java.awt.Label; import java.awt.Menu; import java.awt.MenuBar; import java.awt.MenuItem; import java.awt.MenuShortcut; import java.awt.MouseInfo; import java.awt.PointerInfo; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.JLabel; public class ImageCapture extends JPanel { BufferedImage image; Rectangle rect; Ellipse2D.Double circle; // @jve:decl-index=0: Dimension size = new Dimension(); // @jve:decl-index=0: ImageCapture(BufferedImage image) { this.image = image; rect = new Rectangle(image.getWidth(), image.getHeight()); } /* public void showMousePos(MouseEvent e) { JLabel src = (JLabel)e.getComponent(); PointerInfo pointerInfo = MouseInfo.getPointerInfo(); java.awt.Point point = pointerInfo.getLocation(); src.setText(point.toString()); }*/ protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2 = (Graphics2D)g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); if(circle == null) initCircle(); // Draw image centered. rect.x = (size.width - rect.width)/2; rect.y = (size.height - rect.height)/2; g2.drawImage(image, rect.x, rect.y, this); // Draw circle. g2.setPaint(Color.green); g2.draw(circle); String strX, strY, coord; strX = Integer.toString(this.getMousePosition().x); strY = Integer.toString(this.getMousePosition().y); strY = Integer.toString(MouseInfo.getPointerInfo().getLocation().y); coord = strX + "," + strY; System.out.println(coord); JLabel label = new JLabel(coord); label.setSize(800,500); //label.setHorizontalAlignment(JLabel.CENTER); MouseMotionListener mouseMotionListener = new MouseMotionListener() { public void mouseDragged(MouseEvent e) { showMousePos(e); } public void mouseMoved(MouseEvent e) { showMousePos(e); } private void showMousePos(MouseEvent e) { JLabel src = (JLabel)e.getComponent(); PointerInfo pointerInfo = MouseInfo.getPointerInfo(); java.awt.Point point = pointerInfo.getLocation(); src.setText(point.toString()); // System.out.println(point); } }; //Label label = new Label(coord); //this.add(label, BorderLayout.SOUTH); label.addMouseMotionListener(mouseMotionListener); this.add(label, BorderLayout.CENTER); } private void initCircle() { double cx = rect.getCenterX(); double cy = rect.getCenterY(); double radius = Point2D.distance(cx, cy, 200, 200); circle = new Ellipse2D.Double(0, 0, 2*radius, 2*radius); int diameter = (int)(2*radius)+1; size.setSize(diameter, diameter); } public Dimension getPreferredSize() { return size; } public static void main(String[] args) throws IOException { String path = "D:\\Entert\\mage\\mix\\map_seattle_big.png"; BufferedImage image = ImageIO.read(new File(path)); ImageCapture test = new ImageCapture(image); JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(new JScrollPane(test)); f.setSize(800,500); f.setLocation(500,200); f.setVisible(true); } }

Ulf Dittmer wrote:What stops you from adding the same MouseMotionListener to the ImageCapture object?

i have try to add mouselistener into imagecapture , but cannot work .....sobs...

Ulf Dittmer wrote:Can you describe in words what you mean by "the coordinate on a buffered image"? What are the inputs, and what are the outputs? The code you posted is very thinly commented, and doesn't make clear what the end result should be.

In the imagebrowse file, when mouse move over the image, wherever the mouse move on that image, the system will print the current coordinate. But i want to make use of this function to the buffer image....

How can i have the coordinate on a buffered image ?
i have these two coding, one is buffered image and the other is coordinate part.
How can i combine the coordinate part with the buffer image coding ?
The imageBrowser is coordinate part, the imagecapture is buffer image part. Kindly take a look on it.

import java.awt.BorderLayout; import java.awt.Color; import java.awt.FileDialog; import java.awt.Frame; import java.awt.Graphics; import java.awt.Image; import java.awt.Insets; import java.awt.Menu; import java.awt.MenuBar; import java.awt.MenuItem; import java.awt.MenuShortcut; import java.awt.MouseInfo; import java.awt.PointerInfo; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.JLabel; public class ImageBrowser extends Frame { //private variables to hold image and current directory name. private Image m = null; private String dir = null; //contants for Control-B and Control-X keys private static final int kControlB = 66; private static final int kControlX = 88; public static void main(String[] arg){ ImageBrowser browser = new ImageBrowser(); browser.setVisible(true); }; public void showMousePos(MouseEvent e) { JLabel src = (JLabel)e.getComponent(); PointerInfo pointerInfo = MouseInfo.getPointerInfo(); java.awt.Point point = pointerInfo.getLocation(); src.setText(point.toString()); } public ImageBrowser() { try { Init(); } catch(Exception e) { e.printStackTrace(); } } private void Init() throws Exception { //set title, background color and size of frame this.setTitle("Image Viewer"); this.setBackground(Color.white); this.setSize(200,200); //create menubar for this frame MenuBar menuBar = new MenuBar(); //attach image menu with menubar Menu menu = new Menu("Image"); //include options in image menu menu.add(new MenuItem("Image", new MenuShortcut(kControlB))); menu.add(new MenuItem("Quit", new MenuShortcut(kControlX))); menuBar.add(menu); //listen to the actions user performs on menu menu.addActionListener(new axnListener()); this.setMenuBar(menuBar); //listen to window actions with anonymous inner class this.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e) { System.exit(0); } }); } //opens a file dialog in LOAD mode and retrieves image file name public void loadImage() { FileDialog dlg = new FileDialog(this, "Choose Image", FileDialog.LOAD); //set current directory if(dir != null){ dlg.setDirectory(dir); } dlg.setVisible(true); //get image name and path String imgFile = dlg.getDirectory()+dlg.getFile(); dir = dlg.getDirectory(); //create image using filename Toolkit tk = Toolkit.getDefaultToolkit(); m = tk.getImage(imgFile); //call repaint to draw image repaint(); } public void paint(Graphics g){ //The size of the frame includes any area designated for the border. //The dimensions of the border area can be obtained //using the getInsets method Insets insets = this.getInsets(); g.drawImage(m, insets.left, insets.top, this); this.setSize(m.getWidth(this)+insets.left, m.getHeight(this)+insets.top); String strX, strY, coord; strX = Integer.toString(this.getMousePosition().x); strY = Integer.toString(this.getMousePosition().y); //strY = Integer.toString(MouseInfo.getPointerInfo().getLocation().y); coord = strX + "," + strY; System.out.println(coord); JLabel label = new JLabel(coord); label.setHorizontalAlignment(JLabel.CENTER); MouseMotionListener mouseMotionListener = new MouseMotionListener() { public void mouseDragged(MouseEvent e) { showMousePos(e); } public void mouseMoved(MouseEvent e) { showMousePos(e); } private void showMousePos(MouseEvent e) { JLabel src = (JLabel)e.getComponent(); PointerInfo pointerInfo = MouseInfo.getPointerInfo(); java.awt.Point point = pointerInfo.getLocation(); src.setText(point.toString()); } }; //Label label = new Label(coord); //this.add(label, BorderLayout.SOUTH); label.addMouseMotionListener(mouseMotionListener); this.add(label, BorderLayout.CENTER); } //inner class to listen menu actions class axnListener implements ActionListener{ public void actionPerformed(ActionEvent e){ if(e.getActionCommand().equalsIgnoreCase("Image")){ loadImage(); } else System.exit(0); } }//end of inner class axnListener }//end of ImageBrowser


import java.awt.*; import java.awt.geom.*; import java.awt.image.BufferedImage; import java.io.*; import javax.imageio.ImageIO; import javax.swing.*; public class ImageCapture extends JPanel { BufferedImage image; Rectangle rect; Ellipse2D.Double circle; // @jve:decl-index=0: Dimension size = new Dimension(); // @jve:decl-index=0: ImageCapture(BufferedImage image) { this.image = image; rect = new Rectangle(image.getWidth(), image.getHeight()); } protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2 = (Graphics2D)g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); if(circle == null) initCircle(); // Draw image centered. rect.x = (size.width - rect.width)/2; rect.y = (size.height - rect.height)/2; g2.drawImage(image, rect.x, rect.y, this); // Draw circle. g2.setPaint(Color.green); g2.draw(circle); } private void initCircle() { double cx = rect.getCenterX(); double cy = rect.getCenterY(); double radius = Point2D.distance(cx, cy, 200, 200); circle = new Ellipse2D.Double(0, 0, 2*radius, 2*radius); int diameter = (int)(2*radius)+1; size.setSize(diameter, diameter); } public Dimension getPreferredSize() { return size; } public static void main(String[] args) throws IOException { String path = "D:\\Entert\\mage\\mix\\map_seattle_big.png"; BufferedImage image = ImageIO.read(new File(path)); ImageCapture test = new ImageCapture(image); JFrame f = new JFrame(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(new JScrollPane(test)); f.setSize(400,400); f.setLocation(500,200); f.setVisible(true); } }

How can i use mouse to click on an image and draw a point(example a red dot) after i clicked ?
I also need to save and show the coordinate where i clicked.

salvin francis wrote:As suggested in the other posts by me, have you looked at the java2d api ?

You can use Canvas/JFrame/Frame to draw the points. though Frame is a part of awt and you are better off with JFrame/Canvas for your requirement.
Please do go through basic code for java2d/awt/swing before trying out complex examples.

i have go through it, but i cannot find any info that can let me draw something on an image.....T.T Urgent ...

Can anyone tell me how to draw something(example: circle,lines ) on an image ?

1.Browse an image in local laptop,
2.Display it,
3.Draw something on that image.....

what should i use so that i can draw on image ?
Canvas ? JFrame ? Frame ?

David Newton wrote:If you only have one data point, you're not going to be drawing any lines.

Then 3 data will do ?

David Newton wrote:You're going to have to be more specific about the actual problem you're having.

So far it looks like you don't know how to draw a smooth line given a limited set of data points. There are an arbitrary number of ways to do that--which works best for you can only be decided by you. If this is the problem, search the web for various line-drawing algorithms and pick which one you think works best.

Let say i just want to draw the first line,
how can i set a point (access point) on an image ?
if i have only one data which is at distance=12m, signal strength=-68dbm, how am i going to plot for the first line ?

Does anyone can help me combine these two file ?
I have no idea how to do it.....i have tried many times ...
I just want coordinate show when mouse move over image ....

I have one file is browse image (image browser) and display it, another is coordinate (pos) .....


package contour; import java.awt.*; import java.io.*; import java.awt.event.*; import java.awt.MouseInfo; import javax.swing.JButton; import javax.swing.JLabel; import java.awt.BorderLayout; public class ImageBrowser extends Frame { //private variables to hold image and current directory name. private Image m = null; private String dir = null; //contants for Control-B and Control-X keys private static final int kControlB = 66; private static final int kControlX = 88; public static void main(String[] arg){ ImageBrowser browser = new ImageBrowser(); browser.setVisible(true); }; public ImageBrowser() { try { Init(); } catch(Exception e) { e.printStackTrace(); } } private void Init() throws Exception { //set title, background color and size of frame this.setTitle("Image Viewer"); this.setBackground(Color.white); this.setSize(200,200); //create menubar for this frame MenuBar menuBar = new MenuBar(); //attach image menu with menubar Menu menu = new Menu("Image"); //include options in image menu menu.add(new MenuItem("Image", new MenuShortcut(kControlB))); menu.add(new MenuItem("Quit", new MenuShortcut(kControlX))); menuBar.add(menu); //listen to the actions user performs on menu menu.addActionListener(new axnListener()); this.setMenuBar(menuBar); //listen to window actions with anonymous inner class this.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e) { System.exit(0); } }); } //opens a file dialog in LOAD mode and retrieves image file name public void loadImage() { FileDialog dlg = new FileDialog(this, "Choose Image", FileDialog.LOAD); //set current directory if(dir != null){ dlg.setDirectory(dir); } dlg.setVisible(true); //get image name and path String imgFile = dlg.getDirectory()+dlg.getFile(); dir = dlg.getDirectory(); //create image using filename Toolkit tk = Toolkit.getDefaultToolkit(); m = tk.getImage(imgFile); //call repaint to draw image repaint(); } public void paint(Graphics g){ //The size of the frame includes any area designated for the border. //The dimensions of the border area can be obtained //using the getInsets method Insets insets = this.getInsets(); g.drawImage(m, insets.left, insets.top, this); this.setSize(m.getWidth(this)+insets.left, m.getHeight(this)+insets.top); String strX, strY, coord; strX = Integer.toString(this.getMousePosition().x); strY = Integer.toString(this.getMousePosition().y); //strY = Integer.toString(MouseInfo.getPointerInfo().getLocation().y); coord = strX + "," + strY; System.out.println(coord); Label label = new Label(coord); this.add(label, BorderLayout.SOUTH); } //inner class to listen menu actions class axnListener implements ActionListener{ public void actionPerformed(ActionEvent e){ if(e.getActionCommand().equalsIgnoreCase("Image")){ loadImage(); } else System.exit(0); } }//end of inner class axnListener }//end of ImageBrowser [code] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ [code]package contour; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Pos { public static void main(String args[]) { Runnable runnable = new Runnable() { public void run() { JFrame frame = new JFrame("Mouse Position"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JLabel label = new JLabel(); label.setHorizontalAlignment(JLabel.CENTER); MouseMotionListener mouseMotionListener = new MouseMotionListener() { public void mouseDragged(MouseEvent e) { showMousePos(e); } public void mouseMoved(MouseEvent e) { showMousePos(e); } private void showMousePos(MouseEvent e) { JLabel src = (JLabel)e.getComponent(); PointerInfo pointerInfo = MouseInfo.getPointerInfo(); java.awt.Point point = pointerInfo.getLocation(); src.setText(point.toString()); } }; label.addMouseMotionListener(mouseMotionListener); frame.add(label, BorderLayout.CENTER); frame.setSize(300, 300); frame.setVisible(true); } }; EventQueue.invokeLater(runnable); } }