Re: Trying to draw my overlay
Thomas DeWeese wrote: Using an overlay is pretty trivial, your problems seem to mostly be with the Java language. This is not an appropriate forum to learn Java. There are _lots_ of resources for that. I feared this would come up :) Yes, I thinks this is the core of my problem; I'm learning OOP, Java and Batik all at the same time, programming my first GUI app. I apologise If I've been too annoying with my questions. But I hope to return with more, once I get my Java straight. But in order to get that, I'd like to know if anyone has knowledge of projects that use Batik to do something similar to what I'm trying to do; using and overlay to draw (and perhaps move) some graphics over an SVG-image. I'd like to study some source code. I think that would help me a lot. Doing all sorts of boring classes using Java tutorials will not help me getting this GUI done :) Lasse Riis - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Trying to draw my overlay
Thomas DeWeese wrote: Using an overlay is pretty trivial, your problems seem to mostly be with the Java language. This is not an appropriate forum to learn Java. There are _lots_ of resources for that. I feared this would come up :) Yes, I thinks this is the core of my problem; I'm learning OOP, Java and Batik all at the same time, programming my first GUI app. I apologize If I've been too annoying with my questions. But I hope to return with more, once I get my Java straight. But in order to get that, I'd like to know if anyone has knowledge of projects that use Batik to do something similar to what I'm trying to do; using and overlay to draw (and perhaps move) some graphics over an SVG-image. I'd like to study some source code. I think that would help me a lot. Doing all sorts of boring classes using Java tutorials will not help me getting this GUI done :) Lasse Riis P.S. Our mailserver went down, and it seems this message didn't reach the mailinglist. So if this is a duplicate, I apologize. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Trying to draw my overlay
Lasse: Could you detail what it is you want to do with the overlays. I can think of two uses for them: 1. Related to the SVG content. to draw Scale-unaware selection objects (such as a bounding box, a resize or reshape indicator, etc.) or elements that are not part of the drawing, such as guides. Or you want to annotate your SVG with Graphics2D objects, for some specific reason. 2. Not related to the SVG. That is, your SVG will be simply the background image, for your Java 2D Graphics canvas. With a little more information as to what it is you want to accomplish with the overlays, we may be able to help you better. I have done selection objects both as an overlay and as part of the SVG document, so, although the overlay seems like a simpler solution, event handling makes the option of having the selection elements as part of the SVG a better solution (but you have to make these objects scale and pan aware so they remain the same size regardless of your SVG scale factor.) Andres. On Feb 28, 2005, at 6:04 AM, Lasse Riis wrote: Thomas DeWeese wrote: Using an overlay is pretty trivial, your problems seem to mostly be with the Java language. This is not an appropriate forum to learn Java. There are _lots_ of resources for that. I feared this would come up :) Yes, I thinks this is the core of my problem; I'm learning OOP, Java and Batik all at the same time, programming my first GUI app. I apologize If I've been too annoying with my questions. But I hope to return with more, once I get my Java straight. But in order to get that, I'd like to know if anyone has knowledge of projects that use Batik to do something similar to what I'm trying to do; using and overlay to draw (and perhaps move) some graphics over an SVG-image. I'd like to study some source code. I think that would help me a lot. Doing all sorts of boring classes using Java tutorials will not help me getting this GUI done :) Lasse Riis P.S. Our mailserver went down, and it seems this message didn't reach the mailinglist. So if this is a duplicate, I apologize. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Trying to draw my overlay
Andres Toussaint wrote: Lasse: Could you detail what it is you want to do with the overlays. I can think of two uses for them: 2. Not related to the SVG. That is, your SVG will be simply the background image, for your Java 2D Graphics canvas. This is exactly what it's for. The SVG will be a map of the building, we use SVG because it scales so well on different window/monitor-sizes. So I'll just be using the overlay to draw some form of position-indicator, an arrow, or a dot something like that. And then, as new positions are calculated, probably move it and draw a trail from the previous position. I think an overlay is the best option for this. But I need to read up on Java as a whole. So I'd like to see some source code. Preferrably something that is very similar to what I'm doing. Lasse Riis - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Trying to draw my overlay
Do you want to keep track (i.e. store it) of your overlay information? or will it be volatile, on a per session basis? You want to have the position-indicator to remain the same size (on screen), regardless of the zoom level of your map, right? You want to indicate access routes, elevator position, etc. Right? How are the new positions will be calculated? By moving the indicators, or by modifing the Zoom-pan of the map? This is important to define the best approach. Andres. On Feb 28, 2005, at 10:38 AM, Lasse Riis wrote: Andres Toussaint wrote: Lasse: Could you detail what it is you want to do with the overlays. I can think of two uses for them: 2. Not related to the SVG. That is, your SVG will be simply the background image, for your Java 2D Graphics canvas. This is exactly what it's for. The SVG will be a map of the building, we use SVG because it scales so well on different window/monitor-sizes. So I'll just be using the overlay to draw some form of position-indicator, an arrow, or a dot something like that. And then, as new positions are calculated, probably move it and draw a trail from the previous position. I think an overlay is the best option for this. But I need to read up on Java as a whole. So I'd like to see some source code. Preferrably something that is very similar to what I'm doing. Lasse Riis - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Trying to draw my overlay
Andres Toussaint wrote: Do you want to keep track (i.e. store it) of your overlay information? or will it be volatile, on a per session basis? Volatile, I Don't see any reason to embed them in the SVG and/or let it be saveable. But if the option can be kept open relatively easy, it would of course be better. But primarily I want to be able to update the display often without any slow renders. You want to have the position-indicator to remain the same size (on screen), regardless of the zoom level of your map, right? Undecided. I'd like the coordinate-mapping between the overlay and the map to stay the same if possible. But I guess a constant-sized indicator will look better. The problem is, we might have to indicate areas of the map, if our positioning engine is not precise enough, in that case, the tranparent circle, rectangle, whatever, will have to scale with the map You want to indicate access routes, elevator position, etc. Right? Not sure I know what you mean by this. But I could imagine indicating exits, stairs and such with a highlighted area. But I guess that could be done in the SVG, but having it in the overlay would of course allow for switching it on and off. And that would be a nice feature. How are the new positions will be calculated? By moving the indicators, or by modifing the Zoom-pan of the map? Not sure what you mean here either. The new positions will arrive as UDP datagrams from the positioning backend/engine and when they do, the indicator should move. When it gets closer to the edge of the zoom, the map should pan. So both I guess. But if one option is terribly complex, then the simpler might have to do. Lasse Riis - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Trying to draw my overlay
Hi, But in order to get that, I'd like to know if anyone has knowledge of projects that use Batik to do something similar to what I'm trying to do; using and overlay to draw (and perhaps move) some graphics over an SVG-image. I'd like to study some source code. I think that would help me a lot. Try to look at the source code for Batik Squigle/SVGBrowser especially the Scale/Zoom function, it draw dash-ed rectangle as overlay when you drag the mouse with ctrl key pressed. Regards Tonny Kohar -- Sketsa SVG Graphics Editor http://www.kiyut.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Trying to draw my overlay
Thomas DeWeese wrote:
You are close, basically you want to make your class implement
the Overlay interface from Batik, and associate your mapIt instance
with the canvas as an overlay
Well I guess I'm getting there, but I need more help. Perhaps a good
restructure of my app is in order?
I got this now, and of course it still doesn't work. (I didn't quite
understand James' ideas):
import java.awt.*;
import java.awt.Graphics2D;
import javax.swing.*;
import org.apache.batik.swing.JSVGCanvas;
import org.apache.batik.swing.gvt.GVTTreeRendererAdapter;
import org.apache.batik.swing.gvt.GVTTreeRendererEvent;
import org.apache.batik.swing.gvt.Overlay;
public class mapIt implements Overlay{
public static void main(String[] args) {
JFrame frame = buildGUI();
frame.setSize(200, 600);
frame.setVisible(true);
}
public static JSVGCanvas buildCanvas(){
final JSVGCanvas canvas = new JSVGCanvas();
canvas.setBackground(Color.green);
canvas.setURI(file:/home/riis/P2/maps/gangen.svg);
canvas.addGVTTreeRendererListener(new GVTTreeRendererAdapter() {
public void gvtRenderingCompleted(GVTTreeRendererEvent e) {
System.out.print(Rendering done);
Graphics box = canvas.getGraphics();
paint(box);
}
});
canvas.getOverlays().add(new mapIt());
return canvas;
}
public static JFrame buildGUI(){
JFrame f = new JFrame(PANTS - MapIt);
JSVGCanvas svgCanvas = buildCanvas();
JSlider slider = new JSlider();
JPanel panel = new JPanel(new BorderLayout());
panel.add(North, slider);
panel.add(Center, svgCanvas);
f.getContentPane().add(panel);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
return f;
}
public static void paint(Graphics g) {
g.setColor(java.awt.Color.RED);
g.fillRect(10,10,100,100);
}
}
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Re: Trying to draw my overlay
Lasse Riis wrote:
Thomas DeWeese wrote:
You are close, basically you want to make your class implement
the Overlay interface from Batik, and associate your mapIt instance
with the canvas as an overlay
Well I guess I'm getting there, but I need more help. Perhaps a good
restructure of my app is in order?
I got this now, and of course it still doesn't work. (I didn't quite
understand James' ideas):
public static void paint(Graphics g) {
^^ This wasn't here last time. It won't compile
with this.
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Re: Trying to draw my overlay
Thomas DeWeese wrote:
public static void paint(Graphics g) {
^^ This wasn't here last time. It won't compile
with this.
No, but It won't compile without it either. At least not here. My IDE
tells me to make it static, but i don't understand why.
Someone should do a thorough howto on using an overlay in a jsvgcanvas
and put it in the wiki. At least I think so :)
Lasse
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Re: Trying to draw my overlay
Lasse Riis wrote:
No, but It won't compile without it either. At least not here. My IDE
tells me to make it static, but i don't understand why.
But the problem was that you were using 'java.awt.Color.RED'
not 'java.awt.Color.red'. What is below works.
Someone should do a thorough howto on using an overlay in a jsvgcanvas
and put it in the wiki. At least I think so :)
Using an overlay is pretty trivial, your problems seem to mostly be
with the Java language. This is not an appropriate forum to learn
Java. There are _lots_ of resources for that.
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import java.awt.*;
import java.awt.Graphics2D;
import javax.swing.*;
import org.apache.batik.swing.JSVGCanvas;
import org.apache.batik.swing.gvt.GVTTreeRendererAdapter;
import org.apache.batik.swing.gvt.GVTTreeRendererEvent;
import org.apache.batik.swing.gvt.Overlay;
public class MapIt implements Overlay {
public static void main(String[] args) {
JFrame frame = buildGUI();
frame.setSize(200, 600);
frame.setVisible(true);
}
public static JSVGCanvas buildCanvas(){
final JSVGCanvas canvas = new JSVGCanvas();
canvas.setBackground(Color.green);
canvas.setURI(file:/C:/Apps/cygwin/home/l449433/dev/batik/xml-batik/samples/anne.svg);
canvas.getOverlays().add(new MapIt());
return canvas;
}
public static JFrame buildGUI(){
JFrame f = new JFrame(PANTS - MapIt);
JSVGCanvas svgCanvas = buildCanvas();
JSlider slider = new JSlider();
JPanel panel = new JPanel(new BorderLayout());
panel.add(North, slider);
panel.add(Center, svgCanvas);
f.getContentPane().add(panel);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
return f;
}
public void paint(Graphics g) {
g.setColor(java.awt.Color.red);
g.fillRect(10,10,100,100);
}
}
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Re: Trying to draw my overlay
Lasse Riis wrote: Hi I've been looking in to your answers and trying to build my app. But I'm stuck now. I restructured it to use some methods to build the app, as oppose to a huge main(). It should be very clear to anyone that I am not very familiar with Java. So sometimes I have no idea what I'm doing. And usually just follow my IDE's (eclipse) reccommendations (hence the 'static' methods). So I hope you don't spill your coffee laughing when looking at my code :). But bare in mind, this is the first thing I've ever written. Lasse, you're completely mad! :-P One problem I see with your code is manually creating a Graphics object and trying to paint to it. I think you should try doing Component.getGraphics(), but I'm not sure which component you should choose to paint to. Personally, I would create the image in the SVG DOM, and use event handlers to move it around. Hope that helps, at least a little bit! James Shaw - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Trying to draw my overlay
Lasse Riis wrote:
I've been looking in to your answers and trying to build my app. But I'm
stuck now. I restructured it to use some methods to build the app, as
oppose to a huge main(). [...] Here we go:
You are close, basically you want to make your class implement
the Overlay interface from Batik, and associate your mapIt instance
with the canvas as an overlay
import org.apache.batik.swing.gvt.Overlay; // Interface
public class mapIt implements Overlay { // Note Overlay
public static JSVGCanvas buildCanvas(){
JSVGCanvas canvas = new JSVGCanvas();
canvas.setBackground(Color.green);
canvas.setURI(file:/home/riis/P2/maps/gangen.svg);
// It will now call your paint method whenever it
// update the canvas!
canvas.getOverlays().add(new mapIt());
return canvas;
}
public static JFrame buildGUI(){
JFrame f = new JFrame(PANTS - MapIt);
JSVGCanvas svgCanvas = buildCanvas();
JSlider slider = new JSlider();
JPanel panel = new JPanel(new BorderLayout());
panel.add(North, slider);
panel.add(Center, svgCanvas);
f.getContentPane().add(panel);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
return f;
}
public void paint(java.awt.Graphics g) {
g.setColor(java.awt.Color.RED);
g.fillRect(10,10,100,100);
}
}
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