Zoom interaction, Text background color, and the effect of transparency
import java.awt.*;
import javax.swing.*;
import no.geosoft.cc.graphics.*;
/**
* G demo program. Demonstrates:
*
* <ul>
* <li> Custom world extent
* <li> Zoom interaction
* <li> Text background color
* <li> The effect of transparency
* <li> Annotation layout algorithm
* </ul>
*
* @author <a href="mailto:jacob.dreyer@geosoft.no">Jacob Dreyer</a>
*/
public class Demo5 extends JFrame
{
/**
* Class for creating the demo canvas and hande Swing events.
*/
public Demo5()
{
super ("G Graphics Library - Demo 5");
setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
// Create the GUI
JPanel topLevel = new JPanel();
topLevel.setLayout (new BorderLayout());
getContentPane().add (topLevel);
JPanel buttonPanel = new JPanel();
buttonPanel.add (new JLabel ("Zoom with rubberband and mouse buttons"));
topLevel.add (buttonPanel, BorderLayout.NORTH);
// Create the graphic canvas
GWindow window = new GWindow (new Color (240, 230, 230));
topLevel.add (window.getCanvas(), BorderLayout.CENTER);
// Create scene with default viewport and world extent settings
GScene scene = new GScene (window, "Scene");
scene.setWorldExtent (0.0, -Math.PI / 2.0, 5.0 * Math.PI, 1.0 * Math.PI);
// Create curve object
GObject curve = new Curve();
scene.add (curve);
pack();
setSize (new Dimension (500, 500));
setVisible (true);
window.startInteraction (new ZoomInteraction (scene));
}
/**
* Defines the geometry and presentation for the sample
* graphics object.
*/
public class Curve extends GObject
{
private GSegment curve_;
public Curve()
{
curve_ = new GSegment();
addSegment (curve_);
GStyle curveStyle = new GStyle();
curveStyle.setForegroundColor (new Color (255, 0, 0));
curveStyle.setLineWidth (12);
setStyle (curveStyle);
GStyle textStyle = new GStyle();
textStyle.setForegroundColor (new Color (255, 255, 255));
textStyle.setBackgroundColor (new Color (0.0f, 0.0f, 0.0f, 0.3f));
textStyle.setFont (new Font ("Dialog", Font.BOLD, 14));
for (int i = 0; i < 10; i++) {
GText text = new GText ("Text " + i, GPosition.LEFT | GPosition.EAST);
text.setStyle (textStyle);
curve_.addText (text);
}
}
public void draw()
{
int nPoints = 500;
double[] x = new double[nPoints];
double[] y = new double[nPoints];
double step = Math.PI * 10.0 / nPoints;
for (int i = 0; i < nPoints; i++) {
x[i] = i * step;
y[i] = Math.sin (x[i]);
}
curve_.setGeometry (x, y);
}
}
public static void main (String[] args)
{
new Demo5();
}
}
G-DrawCurve.zip( 204 k)Related examples in the same category
