Draw Line With Arrow between containers in flex

I need to connect multiple containers by drawing arrow . can any one provide me the idea how to do?
Thanks in Advance,
senthil
[email protected]

If your containers are within a spark container them self then you could use fxg to draw arrows based on the containers boundaries
eg this code will draw a red arrow:
<Graphic xmlns="http://ns.adobe.com/fxg/2008" version="2">  <Path data=" M 20 0 C 50 0 50 35 20 35 L 15 35 L 15 45 L 0 32 L 15 19 L 15 29 L 20 29 C 44 29 44 6 20 6">  <stroke> <SolidColorStroke color="#888888"/> </stroke>  <fill> <LinearGradient rotation="90"> <GradientEntry color="#000000" alpha="0.8"/> <GradientEntry color="#FFFFFF" alpha="0.8"/> </LinearGradient> </fill> </Path> </Graphic>
you will have to scale the arrow according to your needs

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Hi,
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Shall i use svg or j2me has solution.
Thanks and regards,
Rakesh.

not possible
graphics.drawLine(float,float,float,float);...there's no such method in MIDP API: [click here for javadoc of Graphics class methods|http://java.sun.com/javame/reference/apis/jsr118/javax/microedition/lcdui/Graphics.html#drawLine(int,%20int,%20int,%20int)]

Draw line with float values possible

Hi,
Using Canvas drawing is possible to draw line with float values.
graphics.drawLine(int,int,int,int);
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Rakesh.

not possible
graphics.drawLine(float,float,float,float);...there's no such method in MIDP API: [click here for javadoc of Graphics class methods|http://java.sun.com/javame/reference/apis/jsr118/javax/microedition/lcdui/Graphics.html#drawLine(int,%20int,%20int,%20int)]

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Perhaps you mean something more like this
similar technique you create the arrow as a straight stroke path with an arrowhead and make it a symbol
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you than make a vertical rectangle and use the 3D Revolve Effect to make a cylinder
then you go to map art
then you choose in the map art to make the geomtery invisible
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If you need a video to follow I'll do one later.

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Hi,
I'm trying to make a map for an underground system in a PC game and I want something similar to the one Transport for London has:
http://www.tfl.gov.uk/assets/downloads/standard-tube-map.gif
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Martin,
In addition to what Kurt said, you may draw paths with straight segments and then round the corners afterwards, using Effect>Stylise>Round Corners (you may Object>Expand Appearance to obtain actual roundings).

How to draw line with width at my will

Dear frineds:
I have following code to draw lines, but I was required:
[1]. draw this line with some required width such as 0.2 or 0.9 or any width at my will
[2]. each line after I draw, when I use mouse to click on it, it will be selected and then I can delete it,
Please advice how to do it or any good example??
Thanks
sunny
package com.draw;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class DrawingArea extends JPanel
     Vector angledLines;
     Point startPoint = null;
     Point endPoint = null;
     Graphics g;
     public DrawingArea()
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          setPreferredSize(new Dimension(500,500));
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          addMouseMotionListener(ml);
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          // automatically called when repaint
          super.paintComponent(g);
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          if (startPoint != null && endPoint != null)
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                    startPoint = e.getPoint();
          public void mouseReleased(MouseEvent e)
               if (SwingUtilities.isLeftMouseButton(e))
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                         AngledLine line = new AngledLine(startPoint, e.getPoint(), true);
                         angledLines.add(line);
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               xPoints = new int[n];
               yPoints = new int[n];
               xPoints[0] = startPoint.x;
               xPoints[1] = endPoint.x;
               yPoints[0] = startPoint.y;
               yPoints[1] = endPoint.y;
               /*if (left)
                    xPoints[1] = startPoint.x;
                    yPoints[1] = endPoint.y;
               else
                    xPoints[1] = endPoint.x;
                    yPoints[1] = startPoint.y;
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          JFrame frame = new JFrame("Test angled lines");
          frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
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          frame.setVisible(true);
}Message was edited by:
sunnymanman

sonudevgan wrote:
dear piz tell me how i can read integer from user my email id is [email protected]
foolish, foolish question

Draw line with Gradient

Hi,
I am trying to implement drawing on canvas with two colors, red and blue.
For example, to draw with the mouse "with two colors".
I do not need a filled rectangle.
I am looking into gradient but without any success.
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devboris wrote:
..For example, to draw with the mouse "with two colors".
import java.awt.*;
import javax.swing.*;
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        JOptionPane.showMessageDialog(null, gp);
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        // cast the Graphics objkect to a Graphics2D object
        // (G2D includes setPaint() method)
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            0,
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            0,
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Hi,
I have an application where i need to connect different
components by line. I am able to connect the components by line but
i dont know how i can add arrow to the line head or one end of
line. When i drag line from a souce component to destination the
line end at destination must have a pointed head i.e arrow.
If any one have solution please reply..
Thank you.

Hi,
I have an application where i need to connect different
components by line. I am able to connect the components by line but
i dont know how i can add arrow to the line head or one end of
line. When i drag line from a souce component to destination the
line end at destination must have a pointed head i.e arrow.
If any one have solution please reply..
Thank you.

Moving a line with arrow keys/can't adjust distance

In Illustrator CS6 I can't adjust how far a line moves when I move it using the arrow keys. I've gone to Preferences>General>Keyboard Increment and changed the amount, but the line moves the same distance no matter what I put in. Neither Snap to Grid nor Snap to Point are turned on.

Thank you Mike! It was driving me crazy. I just started to use CS6 and hadn't messed with any adjustments. How would someone know to check such a seemingly obscure--except to come to the forum?

Drawing line with button??

Hi all.
Why won't this class draw a line when i click the mouse button. Nothing happens when i click on the panel.
import java.util.*;
import java.awt.*;
import javax.swing.JPanel;
import javax.swing.*;
import javax.swing.Action.*;
import java.awt.event.*;
import java.awt.event.MouseAdapter;
public class DrawingPanel extends JPanel implements Observer
private ViewableEtch etch;
private ClearPanel clear;
public DrawingPanel(ViewableEtch etch, ClearPanel clear)
    this.etch = etch;
    this.clear = clear;
   etch.addView(this);
    clear.addView(this);
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        DrawingControl dc = new DrawingControl();
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     Views v = (Views)obs;
     if (v.getSource() == etch)
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       getGraphics().drawLine(etch.getStartX(), etch.getStartY(), etch.getEndX(), etch.getEndY());
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       v.getSource().equals(clear);
public void mouseClicked(MouseEvent e)
//etch.setLine(new etch(getStartX(), getStartY(), e.getEndX(), e.getEndY()));
getGraphics().drawLine(etch.getStartX(), etch.getStartY(), etch.getEndX(), etch.getEndY());
}thanx

This should work
public class MyPanel extends JPanel implements MouseListener {
   public MyPanel() {
      addMouseListener(this);
   public void mouseClicked(MouseEvent e) {
      // Add code here
   public void mouseEntered(MouseEvent e) {}
   public void mouseExited(MouseEvent e) {}
   public void mousePressed(MouseEvent e) {}
   public void mouseReleased(MouseEvent e) {}

Draw lines with a specfic width and color

how to do it?
if given x arrays and y arrays, then connect points.
public void drawLine(int x1, int y1, int x2, int y2)This function doesn't have width and color.

thanks.
I met a problem that the color is obtained by
calculating RGB.
color=a*R+b*G+c*B;
a+b+c=1;
How to get it?huh?

How to implement container with dividers between elements?

What is the correct way to implement custom container with dividers between element in Flex 4 Spark architecture? In Flex 3 I would add dividers in rawChildren array and in updateDisplayList function I would arrange position of dividers and children. I can't do this now because there is no rawChildren and I can't add dividers as elements, because dividers are internal details of control and they should not be available to user. I thought to add second group with dividers, but the layout of splitters depends on the layout of actual content. With new model of separated layouts for Groups I don't know how do this correctly.
Thanks, Aleksey

What is the correct way to implement custom container with dividers between element in Flex 4 Spark architecture? In Flex 3 I would add dividers in rawChildren array and in updateDisplayList function I would arrange position of dividers and children. I can't do this now because there is no rawChildren and I can't add dividers as elements, because dividers are internal details of control and they should not be available to user. I thought to add second group with dividers, but the layout of splitters depends on the layout of actual content. With new model of separated layouts for Groups I don't know how do this correctly.
Thanks, Aleksey

Drawing an arrow between two rectangle shapes

i am trying to draw an arrow between two rectangle shapes. the arrow will start from the center of one rectangle and end with the arrow tip at the edge of the other rectangle. i actually draw the arrow first, and draw the rectangles last so the effect of where the arrow starts will seem to come from the edge and not the center.
i have code using some trigonmetry that works for squares, but as soon as the shape becomes a rectangle (i.e. width and height are not the same), the drawing breaks.
can i detect where a line intersects with a shape through clipping and use that point location to draw my arrow head? if so, how?

Here's one way to do this using the rule of similar triangles.
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class Pointers extends JPanel {
    Rectangle r1 = new Rectangle(40,60,100,150);
    Rectangle r2 = new Rectangle(200,250,175,100);
    int barb = 20;
    double phi = Math.toRadians(20);
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setPaint(Color.blue);
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        g2.draw(r2);
        g2.setPaint(Color.red);
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        double x1 = r1.getCenterX();
        double y1 = r1.getCenterY();
        double x2 = r2.getCenterX();
        double y2 = r2.getCenterY();
        double theta = Math.atan2(y2 - y1, x2 - x1);
        Point2D.Double p1 = getPoint(theta, r1);
        Point2D.Double p2 = getPoint(theta+Math.PI, r2);
        GeneralPath path = new GeneralPath(new Line2D.Float(p1, p2));
        // Add an arrow head at p2.
        double x = p2.x + barb*Math.cos(theta+Math.PI-phi);
        double y = p2.y + barb*Math.sin(theta+Math.PI-phi);
        path.moveTo((float)x, (float)y);
        path.lineTo((float)p2.x, (float)p2.y);
        x = p2.x + barb*Math.cos(theta+Math.PI+phi);
        y = p2.y + barb*Math.sin(theta+Math.PI+phi);
        path.lineTo((float)x, (float)y);
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    private Point2D.Double getPoint(double theta, Rectangle r) {
        double cx = r.getCenterX();
        double cy = r.getCenterY();
        double w = r.width/2;
        double h = r.height/2;
        double d = Point2D.distance(cx, cy, cx+w, cy+h);
        double x = cx + d*Math.cos(theta);
        double y = cy + d*Math.sin(theta);
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                p.x = cx - h*((x-cx)/(y-cy));
                p.y = cy - h;
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        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new Pointers());
        f.setSize(400,400);
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        f.setVisible(true);
}

Line with a arrow

Hi All,
I want to draw multiple line with a arrow. Please guide me how can i do it by code dynamically. exactly as below.
Regards,
Kameshwaran A.

create an empty symbol
put this code in it.
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onClipEvent (load) {
//Make original line invisible
_root.line._visible = 0;
//Initiate some variables
number_lines = 0;
line_active = 0;
//***** Every time the mouse button is released...
onClipEvent (mouseUp) {
//Get the position of the mouse
origin_x = _xmouse;
origin_y = _ymouse;
//Increase the number of lines by one
number_lines++;
//Generate a new line name
name = "line"+number_lines;
//Duplicate a new line
_root.line.duplicateMovieClip(name, number_lines);
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_root[name]._x = origin_x;
_root[name]._y = origin_y;
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_root[name]._xscale = _root._xmouse-origin_x;
_root[name]._yscale = _root._ymouse-origin_y;
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line_active = 1;
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start_x = origin_x;
start_y = origin_y;
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updateAfterEvent();
//***** When a key is pressed
onClipEvent (enterFrame) {
//If it's the Enter key
if (Key.isDown(Key.ENTER))
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_root[name]._yscale = "";
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line_active = 0;
draw a line convert it to a symbol and give it an instance name of line.
and there you can draw lines.
detach the lines by pressing enter.
and thats it.
your welcome in advance (:
INPORTANT to leave all your symbols in the scene not in the libery are it will not work
Message was edited by: xFARRELLx

Using a keyListener to draw with arrow keys

Hi!
I am trying to create an interactive game where the user can
draw a line using the arrow keys (similar to an etch-a-sketch). I
have a start point acting on keyListeners that will move around the
screen using the arrow keys, but I can't seem to figure out how to
get the listeners to draw a line. Here is the correct code that
moves the start point:
information_txt.text = "USE YOUR ARROW KEYS TO DRAW";
var speed:Number = 4;
start_mc.onEnterFrame = function() {
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this._x = this._x+speed;
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this._x = this._x-speed;
if (Key.isDown(Key.UP)) {
this._y = this._y-speed;
} else if (Key.isDown(Key.DOWN)) {
this._y = this._y+speed;
How can I modify Action Script to get the keyListeners to
draw on the arrow keys?
Any help would be MUCH appreciated!!!
Thanks!

Thanks for your reply! That's awesome. you were right, my
script is in AS 2.0... I guess I posted to the wrong section. But I
could easily switch to AS 3.0. I am really just interested in
drawing with the arrow keys and using that action script to draw
onto my own stage/ image. I have tried messing with the script, but
can't seem to get the "drawing" portions of the script to work.
Any suggestions??
Thanks again for the help!!!

Draw Line With Arrow between containers in flex

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