com.github.fritaly.graphml4j.GroupStyle.java Source code

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Here is the source code for com.github.fritaly.graphml4j.GroupStyle.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 com.github.fritaly.graphml4j;

import java.awt.Color;

import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;

import org.apache.commons.lang.Validate;

import com.github.fritaly.graphml4j.yed.Alignment;
import com.github.fritaly.graphml4j.yed.FontStyle;
import com.github.fritaly.graphml4j.yed.LineType;
import com.github.fritaly.graphml4j.yed.Placement;
import com.github.fritaly.graphml4j.yed.Position;
import com.github.fritaly.graphml4j.yed.Shape;
import com.github.fritaly.graphml4j.yed.SizePolicy;

public class GroupStyle extends NodeStyle {

    private float insets = 15.0f;

    public GroupStyle() {
        // Apply the default values here
        setHeight(80.0f);
        setWidth(140.0f);
        setFillColor(Utils.decode("#F5F5F5"));
        setTransparentFill(false);
        setBorderColor(Color.BLACK);
        setBorderType(LineType.LINE);
        setBorderWidth(2.0f);
        setShape(Shape.ROUNDED_RECTANGLE);
        setFontFamily("Dialog");
        setFontSize(15);
        setFontStyle(FontStyle.BOLD);
        setBackgroundColor(null);
        setLineColor(null);
        setTextAlignment(Alignment.CENTER);
        setTextColor(Color.BLACK);
        setVisible(true);
        setSizePolicy(SizePolicy.NODE_WIDTH);
        setBackgroundColor(Utils.decode("#99CCFF"));
        setPlacement(Placement.INTERNAL);
        setPosition(Position.TOP);
        setUnderlinedText(false);

        // This distance is necessary because the group has rounded corners
        setBorderDistance(1.0f);
    }

    public GroupStyle(GroupStyle style) {
        apply(style);
    }

    void apply(GroupStyle style) {
        Validate.notNull(style, "The given style is null");

        // Apply the node-specific attributes
        super.apply(style);

        // Apply the group-specific attributes
        this.insets = style.insets;
    }

    public float getInsets() {
        return insets;
    }

    public void setInsets(float value) {
        Validate.isTrue(value >= 0, String.format("The given insets (%f) must be positive or zero", value));

        this.insets = value;
    }

    private void writeInsets(XMLStreamWriter writer) throws XMLStreamException {
        Validate.notNull(writer, "The given stream writer is null");

        writer.writeEmptyElement("y:BorderInsets");
        writer.writeAttribute("bottom", String.format("%.0f", insets));
        writer.writeAttribute("bottomF", String.format("%.1f", insets));
        writer.writeAttribute("left", String.format("%.0f", insets));
        writer.writeAttribute("leftF", String.format("%.1f", insets));
        writer.writeAttribute("right", String.format("%.0f", insets));
        writer.writeAttribute("rightF", String.format("%.1f", insets));
        writer.writeAttribute("top", String.format("%.0f", insets));
        writer.writeAttribute("topF", String.format("%.1f", insets));
    }

    private void writeState(XMLStreamWriter writer, boolean closed) throws XMLStreamException {
        Validate.notNull(writer, "The given stream writer is null");

        writer.writeEmptyElement("y:State");
        writer.writeAttribute("closed", Boolean.toString(closed));
        writer.writeAttribute("closedHeight", String.format("%.1f", 50.0f)); // TODO Create property for closedHeight
        writer.writeAttribute("closedWidth", String.format("%.1f", 50.0f)); // TODO Create property for closedWidth

        // Infer the property innerGraphDisplayEnabled from the closed flag
        writer.writeAttribute("innerGraphDisplayEnabled", Boolean.toString(!closed));
    }

    void writeTo(XMLStreamWriter writer, String label, boolean closed, float x, float y) throws XMLStreamException {
        Validate.notNull(writer, "The given stream writer is null");

        // Write the node elements
        writeTo(writer, label, x, y);

        // ... and the group-specific ones
        writeState(writer, closed);
        writeInsets(writer);
    }
}