1 files changed, 65 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/ui/MeasureHelper.java b/src/com/android/gallery3d/ui/MeasureHelper.java
new file mode 100644
index 000000000..f65dc10b3
--- /dev/null
+++ b/src/com/android/gallery3d/ui/MeasureHelper.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.gallery3d.ui;
+
+import android.graphics.Rect;
+import android.view.View.MeasureSpec;
+
+class MeasureHelper {
+
+    private static MeasureHelper sInstance = new MeasureHelper(null);
+
+    private GLView mComponent;
+    private int mPreferredWidth;
+    private int mPreferredHeight;
+
+    private MeasureHelper(GLView component) {
+        mComponent = component;
+    }
+
+    public static MeasureHelper getInstance(GLView component) {
+        sInstance.mComponent = component;
+        return sInstance;
+    }
+
+    public MeasureHelper setPreferredContentSize(int width, int height) {
+        mPreferredWidth = width;
+        mPreferredHeight = height;
+        return this;
+    }
+
+    public void measure(int widthSpec, int heightSpec) {
+        Rect p = mComponent.getPaddings();
+        setMeasuredSize(
+                getLength(widthSpec, mPreferredWidth + p.left + p.right),
+                getLength(heightSpec, mPreferredHeight + p.top + p.bottom));
+    }
+
+    private static int getLength(int measureSpec, int prefered) {
+        int specLength = MeasureSpec.getSize(measureSpec);
+        switch(MeasureSpec.getMode(measureSpec)) {
+            case MeasureSpec.EXACTLY: return specLength;
+            case MeasureSpec.AT_MOST: return Math.min(prefered, specLength);
+            default: return prefered;
+        }
+    }
+
+    protected void setMeasuredSize(int width, int height) {
+        mComponent.setMeasuredSize(width, height);
+    }
+
+}