裁剪框跟随画布控件同步缩放

- 添加containerScale属性跟踪缩放比例
- setContainerScale()同步缩放比例到裁剪框
- onDraw()中使用canvas.scale()缩放裁剪框绘制
- 角标半径按比例调整

gallery/src/main/java/cc/winboll/studio/gallery/ZoomContainerView.java

@@ -100,6 +100,13 @@ public class ZoomContainerView extends FrameLayout {
     
     public void setScaleFactor(float scale) {
         scaleFactor = Math.max(minScale, Math.min(scale, maxScale));
+        int childCount = getChildCount();
+        if (childCount > 0) {
+            View child = getChildAt(0);
+            if (child instanceof CropCanvasView) {
+                ((CropCanvasView) child).setContainerScale(scaleFactor);
+            }
+        }
         requestLayout();
         invalidate();
     }