Some skeleton code for anchor layouts. Do not touch this please until it works or i am completely awayhandi/anchor-layout

1 files changed, 108 insertions, 0 deletions

diff --git a/src/main/java/io/github/cottonmc/cotton/gui/widget/WAnchorLayout.java b/src/main/java/io/github/cottonmc/cotton/gui/widget/WAnchorLayout.java
new file mode 100644
index 0000000..bd72836
--- /dev/null
+++ b/src/main/java/io/github/cottonmc/cotton/gui/widget/WAnchorLayout.java
@@ -0,0 +1,108 @@
+package io.github.cottonmc.cotton.gui.widget;
+
+import java.util.concurrent.ConcurrentHashMap;
+
+public class WAnchorLayout {
+  public class AnchorException extends Exception {
+    private static final long serialVersionUID = -4344321727684528775L;
+
+    public AnchorException(AnchorSide side1, String what1, AnchorSide side2, String what2, String why) {
+      super("Unable to link " + side1.toString() + " of " + what1 + " to " + side2.toString() + " of " + what2 + ": " + why);
+    }
+  }
+
+  public enum AnchorSide {
+    TOP,
+    RIGHT,
+    BOTTOM,
+    LEFT,
+  }
+
+  public class Anchor {
+    protected final String anchorName;
+    protected final AnchorSide anchorSide;
+    protected String anchorTarget = null;
+    protected AnchorSide anchorTargetSide = null;
+    protected AnchoredWidget linkedAnchorTarget = null;
+
+    public Anchor(String _anchorName, AnchorSide _anchorSide) {
+      anchorName = _anchorName;
+      anchorSide = _anchorSide;
+    }
+
+    public void bind(String _anchorTarget, AnchorSide _anchorTargetSide) {
+      anchorTarget = _anchorTarget;
+      anchorTargetSide = _anchorTargetSide;
+    }
+
+    public void link(WAnchorLayout layout) throws AnchorException {
+      if (anchorTarget == null) {
+        return;
+      }
+      AnchoredWidget w = layout.getWidgetByName(anchorTarget);
+      if (w == null) {
+        throw new AnchorException(anchorSide, anchorName, anchorTargetSide, anchorTarget, "No such anchor: " + anchorTarget);
+      }
+      linkedAnchorTarget = w;
+    }
+  }
+  
+  public class AnchoredWidget {
+    protected WWidget widget;
+    protected final String name;
+    protected Anchor top, right, bottom, left;
+
+    public AnchoredWidget(String _name, WWidget _widget) {
+      widget = _widget;
+      name = _name;
+      top = new Anchor(name, AnchorSide.TOP);
+      right = new Anchor(name, AnchorSide.RIGHT);
+      bottom = new Anchor(name, AnchorSide.BOTTOM);
+      left = new Anchor(name, AnchorSide.LEFT);
+    }
+
+    public void link(WAnchorLayout layout) throws AnchorException {
+      if (top    != null) top.link(layout);
+      if (right  != null) right.link(layout);
+      if (bottom != null) bottom.link(layout);
+      if (left   != null) left.link(layout);
+    }
+
+    public AnchoredWidget bind(AnchorSide side, AnchorSide toSide, String ofWhat) {
+      Anchor a = null;
+      if (side == null) {
+        return this;
+      } else if (side == AnchorSide.TOP) {
+        a = top;
+      } else if (side == AnchorSide.RIGHT) {
+        a = right;
+      } else if (side == AnchorSide.BOTTOM) {
+        a = bottom;
+      } else if (side == AnchorSide.LEFT) {
+        a = left;
+      }
+      // a.anchorSide
+      return this;
+    }
+  }
+
+  protected ConcurrentHashMap<String, AnchoredWidget> children;
+
+  void add(String name, AnchoredWidget widget) {
+    children.put(name, widget);
+  }
+
+  AnchoredWidget getWidgetByName(String name) {
+    return children.get(name);
+  }
+
+  void link() {
+    children.forEach((k, w) -> {
+      try {
+        w.link(this);
+      } catch (AnchorException e) {
+        e.printStackTrace();
+      }
+    });
+  }
+}
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