annis.visualizers.component.tree.GraphicsBackend Maven / Gradle / Ivy
/*
* Copyright 2009-2011 Collaborative Research Centre SFB 632
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package annis.visualizers.component.tree;
import java.awt.Color;
import java.awt.Stroke;
import java.awt.geom.CubicCurve2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.util.Collection;
public interface GraphicsBackend {
class Alignment {
public static final Alignment NONE = new Alignment(0, 0);
public static final Alignment CENTERED = new Alignment(0.5, 0.5);
private final double x;
private final double y;
public Alignment(double x, double y) {
super();
this.x = x;
this.y = y;
}
public double getXAlign() {
return x;
}
public double getYAlign() {
return y;
}
}
interface Font {
Rectangle2D extents(String string);
double getLineHeight();
public double getAscent();
}
/**
* Returns a backend font object.
*
* @param family The font family
* @param pointSize The point size
* @param style The style constant, as given by the constants in {@link java.awt.Font}.
* @return a backend font object.
*/
Font getFont(String family, int pointSize, int style);
/**
* Creates a new grouping item. Grouping items do not have any content and are just used to
* bundle together other items.
*
* @return a new grouping item.
*/
T group();
/**
* Creates a new label item.
*
* @param label The label string.
* @param pos The label position.
* @param font Font to be used for rendering.
* @param color The text color.
* @param alignment Alignment of the label string with regard to pos.
* @param shape The shape surrounding the label string (border, background color)
* @return a new label item
*/
T makeLabel(String label, Point2D pos, Font font, Color color, Alignment alignment, Shape shape);
T makeLines(Collection lines, Color color, Stroke strokeStyle);
/**
* Creates a new item that draws a cubic curve.
*
* @param curveData The curve data.
* @param strokeStyle The stroking style for the curve.
* @param color The stroke color.
* @return a new graphics item.
*/
T cubicCurve(CubicCurve2D curveData, Stroke strokeStyle, Color color);
/**
* Creates a new arrow item.
*
* @param tip The point of the arrow's tip.
* @param fromDirection The point that specifies the direction from which the arrow is pointing.
* @param dimensions The dimensions (width, height) of the arrow.
* @param fillColor The fill color.
*
* @return a new graphics item.
*/
T arrow(Point2D tip, Point2D fromDirection, Rectangle2D dimensions, Color fillColor);
}