convert Rectangle from on Component to Another Component - Java java.awt

Java examples for java.awt:Component

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Description

convert Rectangle from on Component to Another Component

Demo Code

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//package com.java2s;

public class Main {
    public static java.awt.Rectangle convertRectangle(
            java.awt.Component src, java.awt.Rectangle srcRect,
            java.awt.Component dst) {
        java.awt.Point pt = convertPoint(src, srcRect.x, srcRect.y, dst);
        return new java.awt.Rectangle(pt.x, pt.y, srcRect.width,
                srcRect.height);
    }

    public static java.awt.Point convertPoint(java.awt.Component src,
            int srcX, int srcY, java.awt.Component dst) {
        java.awt.Component srcRoot = javax.swing.SwingUtilities
                .getRoot(src);
        java.awt.Component dstRoot = javax.swing.SwingUtilities
                .getRoot(dst);
        //avoid tree lock, if possible
        if ((srcRoot != null) && (srcRoot == dstRoot)) {
            java.awt.Point srcPt = getLocation(src, srcRoot);
            java.awt.Point dstPt = getLocation(dst, dstRoot);
            java.awt.Point rv = srcPt;
            rv.x -= dstPt.x;
            rv.y -= dstPt.y;
            rv.x += srcX;
            rv.y += srcY;
            return rv;
        } else {
            return javax.swing.SwingUtilities.convertPoint(src, srcX, srcY,
                    dst);
        }
    }

    public static java.awt.Point convertPoint(java.awt.Component src,
            java.awt.Point srcPt, java.awt.Component dst) {
        return convertPoint(src, srcPt.x, srcPt.y, dst);
    }

    private static java.awt.Point getLocation(java.awt.Point rv,
            java.awt.Component c, java.awt.Component ancestor) {
        assert c != null;
        if (c == ancestor) {
            return rv;
        } else {
            rv.x += c.getX();
            rv.y += c.getY();
            return getLocation(rv, c.getParent(), ancestor);
        }
    }

    private static java.awt.Point getLocation(java.awt.Component c,
            java.awt.Component ancestor) {
        return getLocation(new java.awt.Point(), c, ancestor);
    }
}

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