Author Topic: Using the mouse when using OpenGL  (Read 4080 times)

Offline Melssj5

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Using the mouse when using OpenGL
« on: September 04, 2005, 08:11:21 am »
Well, I have a pair of questions:

First is about using the openGL rendering, it opens a new Frame, how can I change the properties of that frame created when enabling the openGL render, for example, changing the title or things like that?

Second: KeyMapper is used to manage key events, but what about the mouse events?
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Offline MFJ

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Using the mouse when using OpenGL
« Reply #1 on: September 04, 2005, 11:49:19 am »
Don't know about OpenGl, sorry. But for mouse events you want to register an AWT mouselistener on your drawing frame. Eg:

Code: [Select]

//Get the graphics context from the applet
Graphics g =mainPanel.getGraphics();

//Setup the mouse listenage
mainPanel.addMouseListener(this);
mainPanel.addMouseMotionListener(this);


Assuming that your program is implementing those two listeners, you can then listen to events from them, see


http://java.sun.com/j2se/1.5.0/docs/api/java/awt/event/package-summary.html


For more details.

Offline EgonOlsen

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Re: Using the mouse when using OpenGL
« Reply #2 on: September 04, 2005, 12:40:07 pm »
Quote from: "Melssj5"

First is about using the openGL rendering, it opens a new Frame, how can I change the properties of that frame created when enabling the openGL render, for example, changing the title or things like that?

Second: KeyMapper is used to manage key events, but what about the mouse events?

Some properties (like the title) can be configured in Config. Have a look at glWindowName for example.
There is no MouseMapper in the package. I've written a very simple one for Paradroidz. I can post the code on monday, when i'm back home.

Offline EgonOlsen

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Using the mouse when using OpenGL
« Reply #3 on: September 05, 2005, 06:08:07 pm »
Here it is. It may contain some Paradroidz specific stuff, but it should help to get you started.

Code: [Select]
package naroth.util;

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;

import org.lwjgl.input.*;
import com.threed.jpct.*;

import naroth.config.*;

public class MouseMapper extends MouseMotionAdapter implements MouseListener {

   public final static int BUTTON1=0;
   public final static int BUTTON2=1;

   private boolean lwjgl;
   private Frame frame=null;
   private java.awt.Cursor oldCursor=null;
   Robot robot=null;
   private int mouseX=0;
   private int mouseY=0;
   private boolean button1=false;
   private boolean button2=false;
   private boolean button3=false;
   private boolean hidden=false;


   public MouseMapper() {
      init(null);
   }

   public MouseMapper(Frame comp) {
      try {
         robot=new Robot();
      } catch (Exception e) {
          Logger.log("Error initializing awt.Robot: "+e.getMessage(), Logger.ERROR);
      }
      init(comp);
   }

   public void mouseMoved(MouseEvent e) {
     mouseX=e.getX()-frame.getInsets().left;
     mouseY=e.getY()-frame.getInsets().top;
   }

   public void mouseDragged(MouseEvent e) {
      mouseX=e.getX()-frame.getInsets().left;
      mouseY=e.getY()-frame.getInsets().top;
   }

   public void mouseClicked(MouseEvent e) {}

   public void mousePressed(MouseEvent e) {
      if (e.getButton()==MouseEvent.BUTTON1) {
         button1=true;
      }
      if (e.getButton()==MouseEvent.BUTTON2) {
         button2=true;
      }
      if (e.getButton()==MouseEvent.BUTTON3) {
         button3=true;
      }
   }

   public void mouseReleased(MouseEvent e) {
     if (e.getButton()==MouseEvent.BUTTON1) {
        button1=false;
     }
     if (e.getButton()==MouseEvent.BUTTON2) {
        button2=false;
     }
     if (e.getButton()==MouseEvent.BUTTON3) {
       button3=false;
    }

  }

  public void mouseEntered(MouseEvent e) {}

  public void mouseExited(MouseEvent e) {}



   public void center() {
      if (frame!=null) {
         int x=frame.getX();
         int y=frame.getY();
         int width=frame.getWidth();
         int height=frame.getHeight();
         width=width>>1;
         height=height>>1;
         x+=width;
         y+=height;
         robot.mouseMove(x,y);
      } else {
         // Tu nix...dies ist schon automatisch durch das Mouse.setGrabbed() erledigt.
      }
   }

   public void hide() {
     if (frame!=null) {
        oldCursor=frame.getCursor();
        int[] pixels=new int[16*16];
        Image image=Toolkit.getDefaultToolkit().createImage(new MemoryImageSource(16, 16, pixels, 0, 16));
        java.awt.Cursor transparentCursor=Toolkit.getDefaultToolkit().createCustomCursor(image, new Point(0, 0),"hidden");
        frame.setCursor(transparentCursor);
      } else {
         Mouse.setGrabbed(true);
      }
      hidden=true;
   }

   public void show() {
      if (frame!=null) {
         if (oldCursor!=null) {
            frame.setCursor(oldCursor);
            oldCursor=null;
         }
      } else {
         Mouse.setGrabbed(false);
      }
      hidden=false;
   }

   public boolean isVisible() {
      return !hidden;
   }

   public void destroy() {
      if (frame!=null) {
         frame.removeMouseMotionListener(this);
         frame.removeMouseListener(this);
      } else {
         if (Mouse.isCreated()) {
            Mouse.destroy();
         }
      }
      show();
   }

   public boolean buttonDown(int button) {
      if (!lwjgl) {
         if (button==BUTTON1) return button1;
         if (button==BUTTON2) return button2|button3;
      }
      return Mouse.isButtonDown(button);
   }

   public int getMouseX() {
      if (!lwjgl) {
         return mouseX;
      } else {
         return Mouse.getX();
      }
   }

   public int getMouseY() {
      if (!lwjgl) {
         return mouseY;
      } else {
         return Configuration.height-Mouse.getY();
      }
   }

   public int getDeltaX() {
      if (!lwjgl) {
         int mouseXCenter=(frame.getWidth()>>1)-frame.getInsets().left; // Korrektur, da mouseMoved und mouseDragged dies auch abziehen
         return mouseX-mouseXCenter;
      } else {
         if (Mouse.isGrabbed()) {
            return Mouse.getDX();
         } else {
            return 0;
         }
      }
   }

   public int getDeltaY() {
      if (!lwjgl) {
         int mouseYCenter=(frame.getHeight()>>1)-frame.getInsets().top; // Korrektur, da mouseMoved und mouseDragged dies auch abziehen
         return mouseY-mouseYCenter;
      } else {
         if (Mouse.isGrabbed()) {
            return Mouse.getDY();
         } else {
            return 0;
         }
      }
   }

   private void init(Frame comp) {
      if (comp!=null) {
         this.frame=comp;
         comp.addMouseMotionListener(this);
         comp.addMouseListener(this);
         lwjgl=false;
         center();
      } else {
         lwjgl=true;
         try {
            if (!Mouse.isCreated()) {
               Mouse.create();
            }
         } catch (Exception e) {
            //e.printStackTrace();
            Logger.log("Couldn't create LWJGL-mouse - initialize the OpenGL renderer first!", Logger.WARNING);
         }
      }
   }
}

Offline Melssj5

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Using the mouse when using OpenGL
« Reply #4 on: September 06, 2005, 09:27:34 am »
:cry:

 :cry:

 :cry:

I see that it seems to be a class that implements a MouseListener and have some methods to handle the events but I cant find where it is set to be used with the OpenGl frame opened, I see that in the constructor it calls to init (null) and it just set the value of a boolean and checks if Mouse is created, if not, it creates it, but I dont see the joint with OpenGl feature. Maybe in the Mouse class that is not posted, because I could find any variable called Mouse.

I tried to use standard MouseListener in the main class, but it doesnt work.

Please can you post the other class to have things a clearlier?  :P
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Offline EgonOlsen

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Using the mouse when using OpenGL
« Reply #5 on: September 06, 2005, 10:47:07 am »
Mouse is provided by LWJGL. It is "automagically" associated with the OpenGL frame. You simply create the OpenGL frame, then the Mouse and it should work fine.

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Using the mouse when using OpenGL
« Reply #6 on: September 06, 2005, 08:37:19 pm »
Nice, thaks a lot.  :idea: