Need Mouse Coordinates While Zooming
I want to annotate the current coordinates of the mouse pointer while the user is rubberbanding to do a zoom. MouseMove would work if I could figure out how to convert the OLE_XPOS_PIXELS coordinates to the Axes coordinates.
Why doesn't mousemove give Axes coordinates? What is the conversion to Axes coordinates?
As you can see, the graph does not support this particular request. In this case, when you are zooming, there is no way you can calculate the coordinates in relation to the axes. You have seen we simply get the pixel points. With this method, you could use the MouseMove command to calibrate your pixels, or in other words, see how many pixels high and long the actual graph window is, and then do scaling calculations in accordance with the min and max values of the x and y axes. This however will not be all that precise, as it is limited by the size of a pixel, and the scaling settings of the graph.
A better way is to change the graph track mode to cwGTrackAllEvents from the zoom mode you were in. cwGTrackAllEvents mode allows you to use the PlotAreaMouseDown and Pl
otAreaMouseUp. These two report back the XPos and YPos in terms of the axes coordinates. Then you can output these to display for the user. At the MouseDown event, you can set the Xmin and Ymax values, and at the MouseUp, set the Xmax and YMin values. This of course means you always do the zooming from upper left to lower right. The only drawback to this method is that you never view the "rubber band", as this is a zoom feature, and is immediately lost in the cwGTrackAllEvents. Hope this solves it for you.
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Hi All,
I've been attempting to write a program that includes a simple modeler. However, I've been having some trouble with being able to select components when attempting to implement zoom functionality - when I "zoom" (which is done via scroll wheel) using the scale Graphics2D method, while it zooms correctly, the mouse location of components do not seem scale.
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I've attached a SSCCE that reproduces the problem below - it implements a JScrollPane with a JPane with a few selectable shapes set as the Viewport. The zoom is done using the mouse scroll wheel (with wheel up being zoom in and wheel down being zoom out)
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import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
public class Tester extends JScrollPane
public Tester() {
this.setViewportView(new Model());
public static void main (String[] args) {
JFrame main = new JFrame();
main.add(new Tester());
main.setSize(500,300);
main.setResizable(false);
main.setVisible(true);
class Model extends JPanel implements MouseListener, MouseWheelListener
private GfxClass selection = null;
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// zoom methods
public void setZoom(double zoom) {
if( zoom < 0 && zoomLevel > 1.0)
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if( zoom > 0 && zoomLevel < 5.0)
zoomLevel += zoom;
public static double getZoom() { return zoomLevel; }
public void resetZoom() { zoomLevel = 1; }
public Model() {
super(null);
addMouseListener(this);
addMouseWheelListener(this);
MyEventQueue meq = new MyEventQueue();
Toolkit.getDefaultToolkit().getSystemEventQueue().push(meq);
for(int i = 0; i <7; i++) {
double angle = Math.toRadians(i * 360 / 7);
GfxClass oc_tmp = new GfxClass((int)(200 + 150 * Math.cos(angle)), (int)(125 + 100 * Math.sin(angle)), "Element"+i);
add(oc_tmp);
repaint();
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Graphics2D g2 = (Graphics2D) g.create();
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super.paint(g2);
g2.setTransform(oldTr);
setBackground (Color.white);
super.paintBorder(g2);
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protected void dispatchEvent(AWTEvent event) {
AWTEvent event2=event;
if ( !(event instanceof MouseWheelEvent) && (event instanceof MouseEvent) ) {
if ( event.getSource() instanceof Component && event instanceof MouseEvent) {
MouseEvent me=(MouseEvent)event2;
Component c=(Component)event.getSource();
Component cursorComponent=SwingUtilities.getDeepestComponentAt(c, me.getX(), me.getY());
JPanel zContainer= getZoomedPanel(cursorComponent);
if (zContainer!=null) {
int x=me.getX();
Point p=SwingUtilities.convertPoint(zContainer,0,0,(Component)event.getSource());
int cX=me.getX()-p.x;
x=x-cX+(int)(cX/getZoom());
int y=me.getY();
int cY=me.getY()-p.y;
y=y-cY+(int)(cY/getZoom());
MouseEvent ze = new MouseEvent(me.getComponent(), me.getID(), me.getWhen(), me.getModifiers(), x, y, me.getClickCount(), me.isPopupTrigger());
event2=ze;
super.dispatchEvent(event2);
public static JPanel getZoomedPanel(Component c) {
if (c == null)
return null;
else if (c instanceof Model)
return (Model)c;
else
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private void deselectAll() {
if(selection != null)
selection.setSelected(false);
selection = null;
public void mouseClicked(MouseEvent arg0) { }
public void mouseEntered(MouseEvent arg0) { }
public void mouseExited(MouseEvent arg0) { }
public void mouseReleased(MouseEvent arg0) { }
public void mousePressed(MouseEvent me) {
Component c1 = findComponentAt(me.getX(),me.getY());
if(c1 instanceof GfxClass)
if(selection != null)
selection.setSelected(false);
selection = (GfxClass)c1;
selection.setSelected(true);
else
deselectAll();
repaint();
return;
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if (notches < 0)
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else
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class GfxClass extends Component { // simple graphical component
private boolean isSelected = false;
private String name;
public GfxClass(int xPos, int yPos, String name) {
this.name = name;
this.setLocation(xPos,yPos);
this.setSize(100,35);
public void setSelected(boolean b) {
if( b == isSelected )
return;
isSelected = b;
repaint();
public boolean isSelected() {
return isSelected;
public void paint(Graphics g2) {
Graphics2D g = (Graphics2D)g2;
if( isSelected )
g.setColor(Color.RED);
else
g.setColor(Color.BLUE);
g.fill(new Ellipse2D.Double(0,0,100,35));
g.setColor(Color.BLACK);
g.drawString(name, getSize().width/2 - 25, getSize().height/2);
}Edited by: Kys99 on Feb 22, 2010 9:09 AM
Edited by: Kys99 on Feb 22, 2010 9:10 AMDelete your EventQueue class. Change one line of code in your mouse pressed method.
public void mousePressed(MouseEvent me) {
Component c1 = findComponentAt((int) (me.getX()/getZoom()),
(int) (me.getY()/getZoom()));
} -
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import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.awt.geom.*;
import javax.swing.*;
import javax.imageio.*;
import java.io.*;
import java.util.ArrayList;
import java.io.IOException;
import java.net.URL;
import java.awt.image.*;
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private Map map;
public void init() {
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validate();
map.validate();
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private Image image;
private ArrayList<Point2D> points;
private ArrayList<Line2D> lineSegment;
private Point2D startingPoint;
private int mouseX;
private int mouseY;
private BufferedImage bimg;
private AffineTransform xform;
private AffineTransform inverse;
private double zoomFactor = 1;
public Map(String url)
super();
//this.image = image;
try
image = ImageIO.read(new URL(url));
catch(Exception e)
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xform.scale(zoomFactor,zoomFactor);
try {
inverse = xform.createInverse();
} catch (NoninvertibleTransformException e) {
System.out.println(e);
points = new ArrayList();
startingPoint = new Point();
bimg = new BufferedImage(this.image.getWidth(this), this.image.getHeight(this), BufferedImage.TYPE_INT_ARGB);
repaintBImg();
addMouseListener(this);
addMouseMotionListener(this);
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Graphics2D g2d = (Graphics2D)g;
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g2d.addRenderingHints(new RenderingHints(RenderingHints.KEY_RENDERING , RenderingHints.VALUE_RENDER_QUALITY ));
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g2d.drawRenderedImage(bimg, xform);
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for(int i=0; i<points.size(); i++)
if(i > 0)
drawLineSegment(g2d,points.get(i-1),points.get(i));
drawPoint(g2d, points.get(i));
if(startingPoint != null)
drawTempLine(startingPoint, g2d);
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mouseX = 0;
mouseY = 0;
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bimg.flush();
Graphics2D g2d = bimg.createGraphics();
g2d.addRenderingHints(new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON));
g2d.addRenderingHints(new RenderingHints(RenderingHints.KEY_RENDERING , RenderingHints.VALUE_RENDER_QUALITY ));
g2d.drawRenderedImage(bimg, xform);
g2d.dispose();
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int x = (int)(p.getX() * zoomFactor);
int y = (int)(p.getY() * zoomFactor);
int w = (int)(13 * zoomFactor);
int h = (int)(13 * zoomFactor);
g2d.setColor(Color.ORANGE);
g2d.setStroke(new BasicStroke(1.0F));
g2d.fillOval(x - w / 2, y - h / 2, w, h);
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g2d.drawOval(x - w / 2, y - h / 2, w - 1, h - 1);
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double x1 = p1.getX() * zoomFactor;
double y1 = p1.getY() * zoomFactor;
double x2 = p2.getX() * zoomFactor;
double y2 = p2.getY() * zoomFactor;
g2d.setColor(Color.RED);
g2d.setStroke(new BasicStroke(3.0F));
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int startX = (int)(p.getX() * zoomFactor);
int startY = (int)(p.getY() * zoomFactor);
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g2d.setStroke(new BasicStroke(2.0F));
g2d.drawLine(startX, startY, mouseX, mouseY);
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mouseX = (int)(e.getX()*zoomFactor);
mouseY = (int)(e.getY()*zoomFactor);
repaint();
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if(e.getButton() == 1)
points.add(inverse.transform(e.getPoint(), null));
if(points.size() > 0)
startingPoint = points.get(points.size()-1);
mouseX = mouseY = 0;
repaint();
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zoomFactor = zoomFactor + .05;
repaintBImg();
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zoomFactor = zoomFactor - .05;
repaintBImg();
public void mouseReleased(MouseEvent e)
if(e.getButton() == 1)
points.add(inverse.transform(e.getPoint(), null));
repaint();
public void mouseEntered(MouseEvent mouseevent)
public void mouseExited(MouseEvent mouseevent)
public void mouseMoved(MouseEvent mouseevent)
}Message was edited by:
hardc0d3rimport java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.awt.geom.*;
import java.io.*;
import java.net.URL;
import java.util.*;
import javax.imageio.*;
import javax.swing.*;
public class ZoomTesting extends JApplet {
public void init() {
//String dir = "file:/" + System.getProperty("user.dir");
//System.out.printf("dir = %s%n", dir);
String url = "http://localhost/image.gif";
//dir + "/images/cougar.jpg";
MapPanel map = new MapPanel(url);
getContentPane().add(map, "Center");
public static void main(String[] args) {
JApplet applet = new ZoomTesting();
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(applet);
f.setSize(400,400);
f.setLocation(200,200);
applet.init();
f.setVisible(true);
class MapPanel extends JPanel implements MouseListener, MouseMotionListener {
private BufferedImage image;
private ArrayList<Point2D> points;
private Point2D startingPoint;
private int mouseX;
private int mouseY;
private AffineTransform xform;
private AffineTransform inverse;
RenderingHints hints;
private double zoomFactor = 1;
public MapPanel(String url) {
super();
try {
image = ImageIO.read(new URL(url));
} catch(Exception e) {
System.out.println(e.getClass().getName() +
" = " + e.getMessage());
Map<RenderingHints.Key, Object> map =
new HashMap<RenderingHints.Key, Object>();
map.put(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
map.put(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_QUALITY);
hints = new RenderingHints(map);
setTransforms();
points = new ArrayList<Point2D>();
startingPoint = new Point();
addMouseListener(this);
addMouseMotionListener(this);
private void setTransforms() {
Insets insets = getInsets();
xform = AffineTransform.getTranslateInstance(insets.left, insets.top);
xform.scale(zoomFactor,zoomFactor);
try {
inverse = xform.createInverse();
} catch (NoninvertibleTransformException e) {
System.out.println(e);
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D)g;
g2d.setRenderingHints(hints);
g2d.drawRenderedImage(image, xform);
if(!points.isEmpty()) {
for(int i=0; i<points.size(); i++) {
if(i > 0)
drawLineSegment(g2d,points.get(i-1),points.get(i));
drawPoint(g2d, points.get(i));
if(startingPoint != null) {
drawTempLine(startingPoint, g2d);
} else {
mouseX = 0;
mouseY = 0;
private void drawPoint(Graphics2D g2d, Point2D p) {
int x = (int)(p.getX() * zoomFactor);
int y = (int)(p.getY() * zoomFactor);
int w = (int)(13 * zoomFactor);
int h = (int)(13 * zoomFactor);
g2d.setColor(Color.ORANGE);
g2d.setStroke(new BasicStroke(1.0F));
g2d.fillOval(x - w / 2, y - h / 2, w, h);
g2d.setColor(Color.BLACK);
g2d.drawOval(x - w / 2, y - h / 2, w - 1, h - 1);
private void drawLineSegment(Graphics2D g2d, Point2D p1, Point2D p2) {
double x1 = p1.getX() * zoomFactor;
double y1 = p1.getY() * zoomFactor;
double x2 = p2.getX() * zoomFactor;
double y2 = p2.getY() * zoomFactor;
g2d.setColor(Color.RED);
g2d.setStroke(new BasicStroke(3.0F));
g2d.draw(new java.awt.geom.Line2D.Double(x1, y1, x2, y2));
private void drawTempLine(Point2D p, Graphics2D g2d) {
int startX = (int)(p.getX() * zoomFactor);
int startY = (int)(p.getY() * zoomFactor);
if(mouseX != 0 && mouseY != 0) {
g2d.setColor(Color.RED);
g2d.setStroke(new BasicStroke(2.0F));
g2d.drawLine(startX, startY, mouseX, mouseY);
public void mouseClicked(MouseEvent e) {}
public void mouseDragged(MouseEvent e) {
mouseX = (int)(e.getX()*zoomFactor);
mouseY = (int)(e.getY()*zoomFactor);
repaint();
public void mousePressed(MouseEvent e) {
if(e.getButton() == 1) {
points.add(inverse.transform(e.getPoint(), null));
if(points.size() > 0) {
startingPoint = points.get(points.size()-1);
mouseX = mouseY = 0;
} else if(e.getButton() == 2) {
zoomFactor = zoomFactor + .05;
setTransforms();
} else if(e.getButton() == 3) {
zoomFactor = zoomFactor - .05;
setTransforms();
repaint();
public void mouseReleased(MouseEvent e) {
if(e.getButton() == 1) {
points.add(inverse.transform(e.getPoint(), null));
repaint();
public void mouseEntered(MouseEvent mouseevent) {}
public void mouseExited(MouseEvent mouseevent) {}
public void mouseMoved(MouseEvent mouseevent) {}
} -
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I am looking into plotting Mouse coordinates on XY Graph continuously based on where i move. My computer's resolution is 1200x800 and i would like it to plot based on where i move.,
Attached is my progress so far.
Attachments:
progress.png 74 KBThe XY Graph has a method which converts coordinates to XY values. You can call it by right clicking the graph and selecting Create>>Invoke Node>>Map Coordinates to XY.
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Forgive me if I've misunderstood your question. -
Mouse movment while clicking not detected
I have a Java Swing program that was built using the Netbeans IDE. I notice that the bottons all work is I hold the mouse still while I click but if the mouse is moving while the click happens my software never sees the click event. User complain that it is sometimes hard to hold the mouse exactly stationary when they click.
I figure there is either some proberty I'm not setting right or I need to look for some other kind of event. I can't seem to find this in the docs. Mybe I don't even know what search term to use.I have a Java Swing program that was built using the Netbeans IDE.Yuck.
the bottons all work is I hold the mouse still while I click but if the mouse is moving while the click happens my software never sees the click event.Use an ActionListener, not a MouseListener.
[http://java.sun.com/docs/books/tutorial/uiswing/index.html]
[http://java.sun.com/docs/books/tutorial/uiswing/components/button.html]
db -
Mouse Coordinates and Timer Resolution
First - I am not a Flash or ActionScript programmer. I have
been asked by someone if I could port my ActiveX code (private) to
the Flash client. In researching all of the Flash, Flex and
ActionScript documentation, it appears that almost everything I
need is present... Almost....
A. My program relies on Mouse Coordinates being fed to it in
twips. The only possible references I get to this issue have come
from searching this forum.
- Is it true that the X and Y coordinates are returned to
ActionScript as floating point values that represent fractional
pixel values that I can translate to twips?
B. My program also relies on good timer resolution. The
Windows GetTicks() API is not sufficient, because it is returned
via the Windows message queue and can be off enormously at a
MouseMove event. Therefore, in my ActiveX code, I call the
QueryPerformanceCounter(), which gives me the resolution I need.
- Can anyone tell me what timer API the Flash client engine
is using for the values it returns?
Thank you,
GrantI still don't understand your problem and apparently nobody else does either since there are no responses. Why don't you write a simple program (like I did for you on your last post) that demonstrates the problem.
"A picture is worth a thousand words". -
Alt + Scroll will not zoom in until finished scrolling; lags while zooms in (Mac)
I'm using Illustrator and the newest mac pro running the most updated version of os x mavericks, with a bluetooth trackpad as a mouse.
I try to alt + scroll to zoom in but illustrator won't start zooming until I finish scrolling. It is extremely jerky while zooming in.
This makes it impossible to use this feature and is disrupting my work flow quite a bit. Any help would be appreciated. Thanks!anybody?
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Mouse coordinates on the screen
is it possible to get mouse coordinates on the screen? i want to make a program which makes screenshots of areas on the screen and i want use the mouse to mark them.
how could i do that? is it possible to get mousecoordinates even if the mouse is outside the java JFrame?
there must be a way! i searched in the forum but i found no answer.
please don't tell me i have to use jni, the app should be platform independent.Yeah, basically there's no way to do this. This should be requested if it hasn't already (too lazy to check). It's not hard for sun to add, they just need to add it. Ok, anyway, I looked into it and see if there was a way to do this even somewhat reasonably in Java. I was very disappointed. I pretty much had no luck, but I did get a lame way of implementing this :P After some thought, this is what I ended up with:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MousePosition extends JFrame implements MouseMotionListener
private int x = 0;
private int y = 0;
private boolean isAP = true;
public MousePosition()
setSize(300, 300);
setLocation(200, 200);
addMouseMotionListener(this);
addMouseListener(new MouseAdapter()
public void mousePressed(MouseEvent e)
isAP = false;
setVisible(true);
try
Robot r = new Robot();
r.mouseMove(getLocation().x + 50, getLocation().y + 50);
r.mousePress(InputEvent.BUTTON1_MASK);
} catch(AWTException e) {}
public void mouseDragged(MouseEvent e)
System.out.println(e.getX() + getLocation().x + ", " + (e.getY() + getLocation().y));
public void mouseMoved(MouseEvent e) {}
public static void main(String[] args)
new MousePosition();
}So it'll "lock" the program getting the absolute coordinates until you press the mouse, then you're free to do what you want. You could also do this with keyPressed or anything else you want. JNI would be the real solution as of now, until then I think sun should address the problem.
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