UI : add drag(...) to Touchable, Element and Assembly

3 files changed, 20 insertions, 1 deletions

diff --git a/core/src/ch/asynk/gdx/boardgame/Touchable.java b/core/src/ch/asynk/gdx/boardgame/Touchable.java
index 0fd99d0..fab7ab9 100644
--- a/core/src/ch/asynk/gdx/boardgame/Touchable.java
+++ b/core/src/ch/asynk/gdx/boardgame/Touchable.java
@@ -3,4 +3,5 @@ package ch.asynk.gdx.boardgame;
 public interface Touchable
 {
     public boolean touch(float x, float y);
+    public boolean drag(float x, float y, int dx, int dy);
 }
diff --git a/core/src/ch/asynk/gdx/boardgame/ui/Assembly.java b/core/src/ch/asynk/gdx/boardgame/ui/Assembly.java
index 6754518..866c3dd 100644
--- a/core/src/ch/asynk/gdx/boardgame/ui/Assembly.java
+++ b/core/src/ch/asynk/gdx/boardgame/ui/Assembly.java
@@ -41,15 +41,27 @@ public abstract class Assembly extends Element
 
     @Override public boolean touch(float x, float y)
     {
-        for (Element e : children)
+        for (Element e : children) {
             if (e.touch(x, y)) {
                 touched = e;
                 return true;
             }
+
+        }
         touched = null;
         return false;
     }
 
+    @Override public boolean drag(float x, float y, int dx, int dy)
+    {
+        if (touched != null) {
+            if (touched.drag(x, y, dx, dy))
+                return true;
+            touched = null;
+        }
+        return false;
+    }
+
     @Override public void draw(Batch batch)
     {
         if (tainted) computeGeometry();
diff --git a/core/src/ch/asynk/gdx/boardgame/ui/Element.java b/core/src/ch/asynk/gdx/boardgame/ui/Element.java
index 3368f3c..dec0cc7 100644
--- a/core/src/ch/asynk/gdx/boardgame/ui/Element.java
+++ b/core/src/ch/asynk/gdx/boardgame/ui/Element.java
@@ -83,6 +83,12 @@ public abstract class Element implements Drawable, Paddable, Positionable, Touch
         return rect.contains(x, y);
     }
 
+    @Override public boolean drag(float x, float y, int dx, int dy)
+    {
+        if (blocked || !visible) return false;
+        return rect.contains(x, y);
+    }
+
     public void taint()
     {
         this.tainted = true;