Passing Data to a Paint Method
Total newbie here just learning the basics of Java on my own. Working a little application that will display a filled polygon which shows the correct heading of ship based on previously input Ship Heading, length and width. I have the application working fine to generate the 5 points, and then it will display correctly when I enter the points in the paint method by hand. Thing is I want to have the coords passed to the paint method. and am having some trouble doing this. All the examples I have seen show the points to be displayed already being declared in the paint method. Here is the Paint Method I have come up with based on examples I have seen. Still pretty new and trying to read through the APIs and other books, but haven't broken the code on understanding them.
import java.awt.*;
import javax.swing.*;
public class DrawShip5
public static void main(String[] a)
JFrame f = new JFrame();
f.setTitle("Ship Heading");
f.setSize(700,700);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setContentPane(new DrawShip2());
f.setVisible(true);
static class DrawShip2 extends JComponent
static public void paintData(int [] finalCoordsArray )
int finalBowACoordX = finalCoordsArray[0];
int finalBowACoordY = finalCoordsArray[1];
int finalPortMidACoordX = finalCoordsArray[2];
int finalPortMidACoordY = finalCoordsArray[3];
int finalPortSternACoordX = finalCoordsArray[4];
int finalPortSternACoordY = finalCoordsArray[5];
int finalStarSternACoordX = finalCoordsArray[6];
int finalStarSternACoordY = finalCoordsArray[7];
int finalStarMidACoordX = finalCoordsArray[8];
int finalStarMidACoordY = finalCoordsArray[9];
public void paint(Graphics g )
// Am sure my problem lies in here
int finalBowACoordX = paintData.finalBowACoordX;
int finalBowACoordY = paintData.finalBowACoordY;
int finalPortMidACoordX = paintData.finalPortMidACoordX;
int finalPortMidACoordY = paintData.finalPortMidACoordY;
int finalPortSternACoordX = paintData.finalPortSternACoordX;
int finalPortSternACoordY = paintData.finalPortSternACoordY;
int finalStarSternACoordX = paintData.finalStarSternACoordX;
int finalStarSternACoordY = paintData.finalStarSternACoordY;
int finalStarMidACoordX = paintData.finalStarMidACoordX;
int finalStarMidACoordY = paintData.finalStarMidACoordY;
g.setColor(Color.black);
g.drawLine(350, 0, 350, 700);
g.drawLine(0, 350, 700, 350);
g.setColor(Color.blue);
Polygon shipPic = new Polygon();
shipPic.addPoint( finalBowACoordX, finalBowACoordY ); // Bow Coords
shipPic.addPoint( finalPortMidACoordX, finalPortMidACoordY ); // Port Midship Coords
shipPic.addPoint( finalPortSternACoordX, finalPortSternACoordY ); // Port Aft Coords
shipPic.addPoint( finalStarSternACoordX, finalStarSternACoordY ); // Starboard Aft Coords
shipPic.addPoint( finalStarMidACoordX, finalStarMidACoordY ); // Starboard Midship Coords
g.fillPolygon( shipPic );
} Thanks for any help
Looks like I was typing as Malcom was responding....where would I add that bit of code?
import java.awt.*;
import javax.swing.*;
public class DrawShip5
public static void main(String[] a)
JFrame f = new JFrame();
f.setTitle("Ship Heading");
f.setSize(700,700);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setContentPane(new DrawShip2());
f.setVisible(true);
// Place the code here? Get an error for the finalCoordsArray not recognized
static class DrawShip2 extends JComponent
private int finalBowACoordX;
private int finalBowACoordY;
private int finalPortMidACoordX;
private int finalPortMidACoordY;
private int finalPortSternACoordX;
private int finalPortSternACoordY;
private int finalStarSternACoordX;
private int finalStarSternACoordY;
private int finalStarMidACoordX;
private int finalStarMidACoordY;
static public void setCoords(int [] finalCoordsArray)
int finalBowACoordX = finalCoordsArray[0];
int finalBowACoordY = finalCoordsArray[1];
int finalPortMidACoordX = finalCoordsArray[2];
int finalPortMidACoordY = finalCoordsArray[3];
int finalPortSternACoordX = finalCoordsArray[4];
int finalPortSternACoordY = finalCoordsArray[5];
int finalStarSternACoordX = finalCoordsArray[6];
int finalStarSternACoordY = finalCoordsArray[7];
int finalStarMidACoordX = finalCoordsArray[8];
int finalStarMidACoordY = finalCoordsArray[9];
// Print final coords after array passed and parsed
System.out.println("Paint Final Bow Coords: (" + finalBowACoordX + ", " + finalBowACoordY + ")");
System.out.println("Paint Final Port Midship Coords: (" + finalPortMidACoordX + ", " + finalPortMidACoordY + ")");
System.out.println("Paint Final Port Stern Coords: (" + finalPortSternACoordX + ", " + finalPortSternACoordY + ")");
System.out.println("Paint Final Starboard Stern Coords: (" + finalStarSternACoordX + ", " + finalStarSternACoordY + ")");
System.out.println("Paint Final Starboard Midship Coords: (" + finalStarMidACoordX + ", " + finalStarMidACoordY + ")");
public void paintComponent(Graphics g )
g.setColor(Color.black);
g.drawLine(350, 0, 350, 700);
g.drawLine(0, 350, 700, 350);
g.setColor(Color.blue);
Polygon shipPic = new Polygon();
shipPic.addPoint( finalBowACoordX, finalBowACoordY ); // Bow Coords
shipPic.addPoint( finalPortMidACoordX, finalPortMidACoordY ); // Port Midship Coords
shipPic.addPoint( finalPortSternACoordX, finalPortSternACoordY ); // Port Aft Coords
shipPic.addPoint( finalStarSternACoordX, finalStarSternACoordY ); // Starboard Aft Coords
shipPic.addPoint( finalStarMidACoordX, finalStarMidACoordY ); // Starboard Midship Coords
g.fillPolygon( shipPic );
}Tried placing that code in a few spots and got errors.
Appreciate the help, These are my first attempts at actually getting away from a single method program. Am getting it ...slowly, but I am getting it.
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Thanks
TanveerDear Poster
Your thread has had no response since it's creation over
2 weeks ago, therefore, I recommend that you either:
- Rephrase the question.
- Provide additional Information to prompt a response.
- Close the thread if the answer is already known.
Thank you for your compliance in this regard.
Jason Boggans
SAP SRM SDN Moderator -
Passing date parameters to a custom folder
Is there any simple way to pass date parmeters to a custom folder?
I think I recognize a question very similar to this recently.
And it's the same situation, in that - what do you mean by passing a date?
I understand it to mean that you want a user - at run time - to enter a date or date range that will then return only that data from a custom folder.
1. You could have all data returned (ie: no date conditions applied to the SQL) and then filter using the Disco tool (ie: plus, viewer, desktop).
2. If you want to 'pass' those date parameters into the actual folder in the EUL, then there is a method that you can use using functions you write.
3. Or you could code the actual database SQL view with some kind of hard-coded date parameters (ie: SYSDATE - 30), etc.
Russ -
How to pass data between views using Flex for mobile?
Hi,
In my 1st view, I have set of images. Each image represents a product category. When I click on an image, it has to show my 2nd view which is a list. This should show all the products linked to this category.
I saw few examples where the 1st view is a list. Select an item in a list shows the details in the next view.
But what I need is, I need to know which image is clicked in my 1st view (ie) Home page. This id needs to be passed to my 2nd view to retrieve the data for the clicked image (clicked product category).
Can anyone help me in this?Chellaa2011,
If I understand you correctly, you can pass data to the next view by passing the second parameter to the pushView method.
check out: http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/spark/components/ViewNa vigator.html#pushView()
I've written similar apps in the past and found that a singleton class alleviates some of these issues. If you use a singleton to track currently selections all your views can access the same data without having to pass and return data from each other.
Hope this helps,
KLee
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