issue position and zoom

sticker/src/main/java/com/xiaopo/flying/sticker/DrawableSticker.java

@@ -1,58 +1,97 @@
 package com.xiaopo.flying.sticker;
 
+/**
+ * Mofified by M.Refaat on 3/25/2018.
+ */
+
+import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.support.annotation.IntRange;
 import android.support.annotation.NonNull;
+import android.support.v4.content.ContextCompat;
+
+import com.netaq.schoolvoice.R;
+import com.xiaopo.flying.sticker.Sticker;
 
 /**
  * @author wupanjie
  */
 public class DrawableSticker extends Sticker {
 
-  private Drawable drawable;
-  private Rect realBounds;
-
-  public DrawableSticker(Drawable drawable) {
-    this.drawable = drawable;
-    realBounds = new Rect(0, 0, getWidth(), getHeight());
-  }
-
-  @NonNull @Override public Drawable getDrawable() {
-    return drawable;
-  }
-
-  @Override public DrawableSticker setDrawable(@NonNull Drawable drawable) {
-    this.drawable = drawable;
-    return this;
-  }
-
-  @Override public void draw(@NonNull Canvas canvas) {
-    canvas.save();
-    canvas.concat(getMatrix());
-    drawable.setBounds(realBounds);
-    drawable.draw(canvas);
-    canvas.restore();
-  }
-
-  @NonNull @Override public DrawableSticker setAlpha(@IntRange(from = 0, to = 255) int alpha) {
-    drawable.setAlpha(alpha);
-    return this;
-  }
-
-  @Override public int getWidth() {
-    return drawable.getIntrinsicWidth();
-  }
-
-  @Override public int getHeight() {
-    return drawable.getIntrinsicHeight();
-  }
-
-  @Override public void release() {
-    super.release();
-    if (drawable != null) {
-      drawable = null;
-    }
-  }
+    private Drawable drawable;
+    public Rect realBounds;
+    private Drawable allocationDrawable;
+    private Rect allocationBounds;
+
+    public DrawableSticker(Drawable drawable, Context context) {
+        this.allocationDrawable = drawable;
+        this.drawable = ContextCompat.getDrawable(context, R.drawable.empty_sticker); // an invisble/empty view to be considered as the mainn drawable
+        realBounds = new Rect(300, 300, getAllocationWidth(), getAllocationHeight());
+        int startX = (getAllocationWidth() / 2) - (getWidth() / 2);
+        int startY = (getAllocationHeight() / 2) - (getHeight() / 2);
+        allocationBounds = new Rect(startX - 300, startY - 300,
+                startX + getWidth() + 300, startY + getHeight() + 300);
+    }
+
+    @NonNull
+    @Override
+    public Drawable getDrawable() {
+        return drawable;
+    }
+
+    @Override
+    public DrawableSticker setDrawable(@NonNull Drawable drawable) {
+        this.drawable = drawable;
+        return this;
+    }
+
+    @Override
+    public void draw(@NonNull Canvas canvas) {
+        canvas.save();
+        canvas.concat(getMatrix());
+        drawable.setBounds(allocationBounds);
+        drawable.draw(canvas);
+        canvas.restore();
+
+        canvas.save();
+        canvas.concat(getMatrix());
+        allocationDrawable.setBounds(realBounds);
+        allocationDrawable.draw(canvas);
+        canvas.restore();
+    }
+
+    @NonNull
+    @Override
+    public DrawableSticker setAlpha(@IntRange(from = 0, to = 255) int alpha) {
+        drawable.setAlpha(alpha);
+        return this;
+    }
+
+    @Override
+    public int getWidth() {
+        return drawable.getIntrinsicWidth();
+    }
+
+    @Override
+    public int getHeight() {
+        return drawable.getIntrinsicHeight();
+    }
+
+    public int getAllocationWidth() {
+        return allocationDrawable.getIntrinsicWidth();
+    }
+
+    public int getAllocationHeight() {
+        return allocationDrawable.getIntrinsicHeight();
+    }
+
+    @Override
+    public void release() {
+        super.release();
+        if (drawable != null) {
+            drawable = null;
+        }
+    }
 }