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/*******************************************************************************
* Copyright (c) 2006 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - Jeff Briggs, Henry Hughes, Ryan Morse
*******************************************************************************/
package org.eclipse.linuxtools.systemtap.ui.graphingapi.ui.widgets;
import org.eclipse.linuxtools.systemtap.ui.graphingapi.ui.internal.Localization;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
/**
* A legend primitive for the Graphing system. Used to display a list of
* all the series that are on this graph, and to change the current axis on a
* normalized multi-series graph.
* @author Jeff Briggs
* @author Ryan Morse
*/
public class GraphLegend implements IGraphPrimitive {
public GraphLegend(GraphCanvas graph, String[] keysPassed, Color[] colorsPassed) {
this.graph = graph;
colors = colorsPassed;
keys = keysPassed;
bounds = new Rectangle[keys.length];
width = 0;
height = 0;
}
public boolean isVisible() {
return true;
}
public void calculateBounds() {
x = graph.getSize().x - width;
y = 0;
}
private void getSize(GC gc) {
textHeight = gc.getFontMetrics().getHeight();
height = textHeight * (keys.length + 1) + (BORDER<<1);
for (int i=0; i<TITLE.length(); i++)
width += gc.getCharWidth(TITLE.charAt(i));
int currWidth;
for(int i=0; i<keys.length; i++) {
currWidth = 0;
for (int j=0; j<keys[i].length(); j++)
currWidth += gc.getCharWidth(keys[i].charAt(j));
if (currWidth > width)
width = currWidth;
}
width += BOX_SIZE + 3*BORDER;
}
public boolean isUnder(Point loc) {
if(loc.x >=x && loc.y >= y && loc.x <= x+width && loc.y <= y+height)
return true;
return false;
}
public void paint(GC gc) {
if(width == 0 || height ==0)
getSize(gc);
calculateBounds();
Color temp = gc.getForeground();
gc.setForeground(graph.axisColor);
gc.drawRectangle(x, y, width, height);
gc.fillRectangle(x+1, y+1, width-1, height-1);
gc.drawText(TITLE, x+BORDER, y+BORDER);
for (int i=0; i<keys.length; i++) {
gc.setForeground(colors[i]);
bounds[i] = new Rectangle(x+BORDER, y+BORDER+((i+1)*textHeight), BOX_SIZE, BOX_SIZE);
gc.fillGradientRectangle(bounds[i].x, bounds[i].y, BOX_SIZE, BOX_SIZE, true);
gc.setForeground(graph.axisColor);
gc.drawText(keys[i], x+(BORDER<<1)+BOX_SIZE, bounds[i].y);
}
gc.setForeground(temp);
}
private final GraphCanvas graph;
private int x, y, width, height, textHeight;
private String[] keys;
private Color[] colors;
private Rectangle[] bounds;
private static final int BORDER = 5;
private static final int BOX_SIZE = 15;
private static final String TITLE = Localization.getString("GraphLegend.Legend");
}
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