2 files changed, 319 insertions, 0 deletions
diff --git a/src/graphui/classes/com/jogamp/graph/ui/layout/BoxLayout.java b/src/graphui/classes/com/jogamp/graph/ui/layout/BoxLayout.java
new file mode 100644
index 000000000..6f6e610f6
--- /dev/null
+++ b/src/graphui/classes/com/jogamp/graph/ui/layout/BoxLayout.java
@@ -0,0 +1,122 @@
+/**
+ * Copyright 2023 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package com.jogamp.graph.ui.layout;
+
+import java.util.List;
+
+import com.jogamp.graph.ui.Group;
+import com.jogamp.graph.ui.Shape;
+import com.jogamp.opengl.math.FloatUtil;
+import com.jogamp.opengl.math.geom.AABBox;
+import com.jogamp.opengl.util.PMVMatrix;
+
+/**
+ * GraphUI Stack {@link Group.Layout}.
+ * <p>
+ * A stack of {@link Shape}s
+ * - size kept unscaled
+ * - position depends on {@Link Padding} and {@link Margin}
+ * - *cell* size can be set
+ * </p>
+ */
+public class BoxLayout implements Group.Layout {
+    private final float cellWidth, cellHeight;
+    private final Margin margin;
+    private final Padding padding;
+    private final float borderThickness;
+
+    public BoxLayout(final Padding padding) {
+        this(0f, 0f, new Margin(), padding);
+    }
+    public BoxLayout(final float width, final float height, final Margin margin) {
+        this(width, height, margin, new Padding());
+    }
+    public BoxLayout(final float width, final float height, final Margin margin, final Padding padding) {
+        this.cellWidth = Math.max(0f, width);
+        this.cellHeight = Math.max(0f, height);
+        this.margin = margin;
+        this.padding = padding;
+        this.borderThickness = 0f;
+    }
+
+    public Padding getPadding() { return padding; }
+    public Margin getMargin() { return margin; }
+
+    @Override
+    public void layout(final Group g, final AABBox box, final PMVMatrix pmv) {
+        final boolean hasCellWidth = !FloatUtil.isZero(cellWidth);
+        final boolean hasCellHeight = !FloatUtil.isZero(cellHeight);
+        final List<Shape> shapes = g.getShapes();
+        final AABBox sbox = new AABBox();
+        for(int i=0; i < shapes.size(); ++i) {
+            final Shape s = shapes.get(i);
+            pmv.glPushMatrix();
+            s.setTransform(pmv);
+            s.getBounds().transformMv(pmv, sbox);
+            pmv.glPopMatrix();
+
+            // adjust size and position (centered)
+            final float paddedWidth = sbox.getWidth() + padding.width();
+            final float paddedHeight = sbox.getHeight() + padding.height();
+            final float marginedWidth = paddedWidth + margin.width();
+            final float marginedHeight = paddedHeight + margin.height();
+            final float cellWidth2 = hasCellWidth ? cellWidth : marginedWidth;
+            final float cellHeight2 = hasCellHeight ? cellHeight : marginedHeight;
+            final float x, y;
+            if( margin.isCenteredHoriz() || hasCellWidth && sbox.getWidth() + padding.width() + margin.width() > cellWidth2 ) {
+                x = 0;
+            } else {
+                x = margin.left + padding.left;
+            }
+            if( margin.isCenteredVert() || hasCellHeight && sbox.getHeight() + padding.height() + margin.height() > cellHeight2 ) {
+                y = 0;
+            } else {
+                y = margin.bottom + padding.bottom;
+            }
+            float dxh = 0, dyh = 0;
+            if( margin.isCenteredHoriz() ) {
+                dxh += 0.5f * ( cellWidth2 - paddedWidth ); // actual horiz-centered
+            }
+            if( margin.isCenteredVert() ) {
+                dyh += 0.5f * ( cellHeight2 - paddedHeight ); // actual vert-centered
+            }
+            System.err.println("["+i+"].m: "+x+" / "+y+" + "+dxh+" / "+dyh+", p "+paddedWidth+" x "+paddedHeight+", sz "+cellWidth2+" x "+cellHeight2+", box "+box.getWidth()+" x "+box.getHeight());
+            s.moveTo( x + dxh, y + dyh, 0f ); // center the scaled artifact
+            s.move( sbox.getLow().mul(-1f) ); // remove the bottom-left delta
+            box.resize( x + cellWidth2 + padding.right, y + cellHeight2 + padding.top,    0);
+            box.resize( x              - padding.left,  y -               padding.bottom, 0);
+            System.err.println("["+i+"].x: "+x+" / "+y+" + "+dxh+" / "+dyh+" -> "+s.getPosition()+", p "+paddedWidth+" x "+paddedHeight+", sz "+cellWidth2+" x "+cellHeight2+", box "+box.getWidth()+" x "+box.getHeight());
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "Box[cell["+cellWidth+" x "+cellHeight+"], "+margin+", "+padding+"]";
+    }
+}
+
diff --git a/src/graphui/classes/com/jogamp/graph/ui/layout/Margin.java b/src/graphui/classes/com/jogamp/graph/ui/layout/Margin.java
new file mode 100644
index 000000000..f78c9dea9
--- /dev/null
+++ b/src/graphui/classes/com/jogamp/graph/ui/layout/Margin.java
@@ -0,0 +1,197 @@
+/**
+ * Copyright 2023 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package com.jogamp.graph.ui.layout;
+
+import com.jogamp.opengl.math.FloatUtil;
+
+/**
+ * GraphUI CSS property Margin, space between or around elements.
+ *
+ * The CSS margin properties are used to create space around elements, outside of any defined borders.
+ *
+ * {@link Margin#CENTER} is mapped to `zero` while earmarking {@link #isCenteredHoriz()} and {@link #isCenteredVert()}.
+ * The container must be sized via its layout horizontally and/or vertically matching the centered axis, similar to CSS.
+ */
+public class Margin {
+    /** Auto margin value to horizontally and/or vertically center an element within its sized-layout container, value if {@link Float#NaN}. */
+    public static final float CENTER = Float.NaN;
+
+    /** Top value */
+    public final float top;
+    /** Right value */
+    public final float right;
+    /** Bottom value */
+    public final float bottom;
+    /** Left value */
+    public final float left;
+
+    private final int bits;
+    static private final int CENTER_HORIZ = 1 << 0;
+    static private final int CENTER_VERT  = 1 << 1;
+    static private int getBits(final float top, final float right, final float bottom, final float left) {
+        int b = 0;
+        if( FloatUtil.isEqual(CENTER, left) && FloatUtil.isEqual(CENTER, right) ) {
+            b |= CENTER_HORIZ;
+        }
+        if( FloatUtil.isEqual(CENTER, top) && FloatUtil.isEqual(CENTER, bottom) ) {
+            b |= CENTER_VERT;
+        }
+        return b;
+    }
+
+    /**
+     * Ctor w/ zero values
+     */
+    public Margin() {
+        top = 0f; right = 0f; bottom = 0f; left = 0f; bits = 0;
+    }
+
+    /**
+     * Ctor
+     * @param top top value
+     * @param right right value
+     * @param bottom bottom value
+     * @param left left value
+     */
+    public Margin(final float top, final float right, final float bottom, final float left) {
+        this.bits = getBits(top, right, bottom, left);
+        if( isCenteredVert() ) {
+            this.top = 0;
+            this.bottom = 0;
+        } else {
+            this.top = top;
+            this.bottom = bottom;
+        }
+        if( isCenteredHoriz() ) {
+            this.right = 0;
+            this.left = 0;
+        } else {
+            this.right = right;
+            this.left = left;
+        }
+    }
+
+    /**
+     * Ctor
+     * @param top top value
+     * @param rl right and left value, use {@link #CENTER} to horizontally center the element in its container
+     * @param bottom bottom value
+     */
+    public Margin(final float top, final float rl, final float bottom) {
+        this.bits = getBits(top, rl, bottom, rl);
+        if( isCenteredVert() ) {
+            this.top = 0;
+            this.bottom = 0;
+        } else {
+            this.top = top;
+            this.bottom = bottom;
+        }
+        if( isCenteredHoriz() ) {
+            this.right = 0;
+            this.left = 0;
+        } else {
+            this.right = rl;
+            this.left = rl;
+        }
+    }
+
+    /**
+     * Ctor
+     * @param tb top and bottom value, use {@link #CENTER} to vertically center the element in its container
+     * @param rl right and left value, use {@link #CENTER} to horizontally center the element in its container
+     */
+    public Margin(final float tb, final float rl) {
+        this.bits = getBits(tb, rl, tb, rl);
+        if( isCenteredVert() ) {
+            this.top = 0;
+            this.bottom = 0;
+        } else {
+            this.top = tb;
+            this.bottom = tb;
+        }
+        if( isCenteredHoriz() ) {
+            this.right = 0;
+            this.left = 0;
+        } else {
+            this.right = rl;
+            this.left = rl;
+        }
+    }
+
+    /**
+     * Ctor
+     * @param trbl top, right, bottom and left value, use {@link #CENTER} to horizontally and vertically center the element in its container.
+     */
+    public Margin(final float trbl) {
+        this.bits = getBits(trbl, trbl, trbl, trbl);
+        if( isCenteredVert() ) {
+            this.top = 0;
+            this.bottom = 0;
+        } else {
+            this.top = trbl;
+            this.bottom = trbl;
+        }
+        if( isCenteredHoriz() ) {
+            this.right = 0;
+            this.left = 0;
+        } else {
+            this.right = trbl;
+            this.left = trbl;
+        }
+    }
+
+    /** Returns true if {@link #left} and {@link #right} is {@link #CENTER}. */
+    public boolean isCenteredHoriz() {
+        return 0 != ( CENTER_HORIZ & bits );
+    }
+
+    /** Returns true if {@link #top} and {@link #bottom} is {@link #CENTER}. */
+    public boolean isCenteredVert() {
+        return 0 != ( CENTER_VERT & bits );
+    }
+
+    /** Returns true if {@link #isCenteredHoriz()} and {@link #isCenteredVert()} is true, i.e. for horizontal and vertical center. */
+    public boolean isCentered() {
+        return 0 != ( ( CENTER_VERT | CENTER_HORIZ ) & bits );
+    }
+
+    /** Return width of horizontal values top + right. Zero if {@link #isCenteredHoriz()}. */
+    public float width() { return left + right; }
+
+    /** Return height of vertical values bottom + top. Zero if {@link #isCenteredVert()}. */
+    public float height() { return bottom + top; }
+
+    public boolean zeroSumWidth() { return FloatUtil.isZero( width() ); };
+
+    public boolean zeroSumHeight() { return FloatUtil.isZero( height() ); };
+
+    public boolean zeroSumSize() { return zeroSumWidth() && zeroSumHeight(); }
+
+    @Override
+    public String toString() { return "Margin[t "+top+", r "+right+", b "+bottom+", l "+left+", ctr[h "+isCenteredHoriz()+", v "+isCenteredVert()+"]]"; }
+}