Examples of org.graphstream.ui.graphicGraph.StyleGroup

org.graphstream.ui.graphicGraph.StyleGroup
A group of graph elements that share the same style.
The purpose of a style group is to allow retrieving all elements with the same style easily. Most of the time, with graphic engines, pushing the graphic state (the style, colors, line width, textures, gradients) is a costly operation. Doing it once for several elements can speed up things a lot. This is the purpose of the style group.

The action of drawing elements in group (first push style, then draw all elements) are called bulk drawing. All elements that can be drawn at once this way are called bulk elements.

In a style group it is not always possible do draw elements in a such a "bulk" operation. If the style contains "dynamic values" for example, that is value that depend on the value of an attribute stored on the element, or if the element is modified by an event (clicked, selected), the element will not be drawn the same as others.

The style group provides iterators on each of these categories of elements :
- {@link #elements()} allows to browse all elements contained in the groupwithout exception.
- {@link #dynamicElements()} allows to browse the subset of elements havinga attribute that modify their style.
- {@link #elementsEvents()} allows to browse the subset of elementsmodified by an event.
- {@link #bulkElements()} allows to browse all remaining elements that haveno dynamic attribute or event.
The calling the three last iterators would yield the same elements as calling the first one. When drawing you can optimise the drawing by first pushing the graphic state and then drawing at once all bulk elements. If the dynamic and event subsets are not empty you then must draw such elements modifying the graphic state for each one.

   * @return The length from the node centre along the edge to position the
   *         arrow.
   */
  protected double evalTargetRadius(GraphicEdge edge, GraphMetrics metrics) {
    GraphicNode target = edge.to;
    StyleGroup group = target.getStyle();
    double w = metrics.lengthToGu(group.getSize(), 0);
    double h = group.getSize().size() > 1 ? metrics.lengthToGu(
        group.getSize(), 1) : w;


    if (w == h) {
      double b = group.getStrokeMode() != StrokeMode.NONE ? metrics
          .lengthToGu(group.getStrokeWidth()) : 0;
      return ((w / 2) + b);
    } else {
      return evalEllipseRadius(edge, w, h);
    }
  }

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  }


  // Rendering


  protected void renderGraph(Graphics2D g) {
    StyleGroup style = graph.getStyle();


    setupGraphics(g);
    renderGraphBackground(g);
    renderBackLayer(g);
    camera.pushView(graph, g);
    renderGraphElements(g);


    if (style.getStrokeMode() != StyleConstants.StrokeMode.NONE
        && style.getStrokeWidth().value != 0) {
      GraphMetrics metrics = camera.getMetrics();
      Rectangle2D rect = new Rectangle2D.Double();
      double px1 = metrics.px1;
      Value stroke = style.getShadowWidth();


      rect.setFrame(metrics.lo.x, metrics.lo.y + px1,
          metrics.size.data[0] - px1, metrics.size.data[1] - px1);
      g.setStroke(new BasicStroke((float) metrics.lengthToGu(stroke)));
      g.setColor(graph.getStyle().getStrokeColor(0));

View Full Code Here

   * 
   * @param g
   *            The Swing graphics.
   */
  protected void renderGraphBackground(Graphics2D g) {
    StyleGroup group = graph.getStyle();


    if (group.getFillMode() != FillMode.NONE) {
      g.setColor(group.getFillColor(0));
      g.fillRect(0, 0, (int) camera.getMetrics().viewport[2],
          (int) camera.getMetrics().viewport[3]);
    }
  }

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  public void testStyleEvents() {
    StyleGroupSet sgs = new StyleGroupSet(stylesheet);


    populateGroupSet(sgs);


    StyleGroup sA = sgs.getStyleForElement(A);
    StyleGroup sB = sgs.getStyleForElement(B);
    StyleGroup sC = sgs.getStyleForElement(C);
    StyleGroup sD = sgs.getStyleForElement(D);


    assertEquals(1, sA.getStrokeWidth().value, 0);
    assertEquals(1, sB.getStrokeWidth().value, 0);
    assertEquals(1, sC.getStrokeWidth().value, 0);
    assertEquals(1, sD.getStrokeWidth().value, 0);


    // Test global events (events that apply to a whole group or groups).


    sgs.pushEvent("clicked"); // This is normally done automatically by the
                  // GraphicElement


    sA = sgs.getStyleForElement(A);
    sB = sgs.getStyleForElement(B);
    sC = sgs.getStyleForElement(C);
    sD = sgs.getStyleForElement(D);


    assertEquals(2, sA.getStrokeWidth().value, 0);
    assertEquals(3, sB.getStrokeWidth().value, 0);
    assertEquals(3, sC.getStrokeWidth().value, 0);
    assertEquals(3, sD.getStrokeWidth().value, 0);


    sgs.popEvent("clicked"); // This is normally done automatically by the
                  // GraphicElement


    sA = sgs.getStyleForElement(A);
    sB = sgs.getStyleForElement(B);
    sC = sgs.getStyleForElement(C);
    sD = sgs.getStyleForElement(D);


    assertEquals(1, sA.getStrokeWidth().value, 0);
    assertEquals(1, sB.getStrokeWidth().value, 0);
    assertEquals(1, sC.getStrokeWidth().value, 0);
    assertEquals(1, sD.getStrokeWidth().value, 0);


    sgs.pushEvent("clicked"); // Both events at a time.
    sgs.pushEvent("selected"); // They should cascade.


    sA = sgs.getStyleForElement(A);
    sB = sgs.getStyleForElement(B);
    sC = sgs.getStyleForElement(C);
    sD = sgs.getStyleForElement(D);


    assertEquals(4, sA.getStrokeWidth().value, 0);
    assertEquals(3, sB.getStrokeWidth().value, 0);
    assertEquals(3, sC.getStrokeWidth().value, 0);
    assertEquals(3, sD.getStrokeWidth().value, 0);


    sgs.popEvent("clicked"); // This is normally done automatically by the
                  // GraphicElement
    sgs.popEvent("selected"); // This is normally done automatically by the
                  // GraphicElement


    // Now test individual events, that is events that apply to
    // an individual element only.


    sA = sgs.getStyleForElement(A);


    assertFalse(sA.hasEventElements());


    sgs.pushEventFor(A, "clicked"); // This is normally done automatically
                    // by the GraphicElement
    sgs.pushEventFor(B, "clicked"); // This is normally done automatically
                    // by the GraphicElement


    sA = sgs.getStyleForElement(A);
    sB = sgs.getStyleForElement(B);
    sC = sgs.getStyleForElement(C);
    sD = sgs.getStyleForElement(D);


    assertTrue(sA.hasEventElements());


    assertEquals(1, sA.getStrokeWidth().value, 0); // Individual events must be
                          // activated
    assertEquals(1, sB.getStrokeWidth().value, 0); // to work, so just pushing
                          // them is not
    assertEquals(1, sC.getStrokeWidth().value, 0); // sufficient.
    assertEquals(1, sD.getStrokeWidth().value, 0);


    sA.activateEventsFor(A);
    assertEquals(2, sA.getStrokeWidth().value, 0); // Only A should change.
    assertEquals(1, sB.getStrokeWidth().value, 0);
    assertEquals(1, sC.getStrokeWidth().value, 0);
    assertEquals(1, sD.getStrokeWidth().value, 0);
    sA.deactivateEvents();
    sB.activateEventsFor(B);
    assertEquals(1, sA.getStrokeWidth().value, 0);
    assertEquals(3, sB.getStrokeWidth().value, 0); // B and all its group
                          // change.
    assertEquals(3, sC.getStrokeWidth().value, 0); // Therefore C also changes.
    assertEquals(1, sD.getStrokeWidth().value, 0);
    sB.deactivateEvents();


    sgs.popEventFor(A, "clicked"); // This is normally done automatically by
                    // the GraphicElement
    sgs.popEventFor(B, "clicked"); // This is normally done automatically by
                    // the GraphicElement


    // Now two individual events at a time.


    sgs.pushEventFor(A, "clicked"); // This is normally done automatically
                    // by the GraphicElement
    sgs.pushEventFor(A, "selected"); // This is normally done automatically
                      // by the GraphicElement


    sA = sgs.getStyleForElement(A);
    sB = sgs.getStyleForElement(B);
    sC = sgs.getStyleForElement(C);
    sD = sgs.getStyleForElement(D);


    assertEquals(1, sA.getStrokeWidth().value, 0); // Individual events must be
                          // activated
    assertEquals(1, sB.getStrokeWidth().value, 0); // to work, so just pushing
                          // them is not
    assertEquals(1, sC.getStrokeWidth().value, 0); // sufficient.
    assertEquals(1, sD.getStrokeWidth().value, 0);


    sA.activateEventsFor(A);
    assertEquals(4, sA.getStrokeWidth().value, 0); // Only A should change,
                          // "selected" has
    assertEquals(1, sB.getStrokeWidth().value, 0); // precedence over "clicked"
                          // since added
    assertEquals(1, sC.getStrokeWidth().value, 0); // after.
    assertEquals(1, sD.getStrokeWidth().value, 0);
    sA.deactivateEvents();


    sgs.popEventFor(A, "clicked"); // This is normally done automatically by
                    // the GraphicElement
    sgs.popEventFor(A, "selected"); // This is normally done automatically

View Full Code Here


    shadow = sgs.getShadowIterator();
    count = 0;


    while (shadow.hasNext()) {
      StyleGroup g = shadow.next();
      assertTrue(groups.contains(g.getId()));
      count++;
    }


    assertTrue(count == 3); // There are three node groups.


    // Then we add a style that adds shadows to a specific edge.


    stylesheet.parseFromString(styleSheet9);
    assertTrue(sgs.getGroupCount() == 6);
    groups.add("e_AB");


    shadow = sgs.getShadowIterator();
    count = 0;


    while (shadow.hasNext()) {
      StyleGroup g = shadow.next();
      assertTrue(groups.contains(g.getId()));
      count++;
    }


    assertTrue(count == 4); // Three node groups, plus one edge group (e_AB)
  }

View Full Code Here


    StyleGroupSet sgs = new StyleGroupSet(stylesheet);


    populateGroupSet(sgs);


    StyleGroup sA = sgs.getStyleForElement(A);
    StyleGroup sB = sgs.getStyleForElement(B);
    StyleGroup sC = sgs.getStyleForElement(C);
    StyleGroup sD = sgs.getStyleForElement(D);


    // First test the basic iterator. B and C should be in the same group.


    assertTrue(sB == sC); // B and C are in the same group.
    assertFalse(sA == sB);

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org.graphstream.ui.graphicGraph.stylesheet.Style

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org.graphstream.ui.swingViewer.basicRenderer.SwingBasicGraphRenderer

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