1 files changed, 50 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ProgressScaler.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ProgressScaler.java
new file mode 100644
index 000000000..23961c05f
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/ProgressScaler.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.util;
+
+/** This is a simple class that wraps a ProgressDialogUpdater, scaling the progress
+ * values into a specified range.
+ */
+public class ProgressScaler implements ProgressDialogUpdater {
+
+    final ProgressDialogUpdater mWrapped;
+    final int mFrom, mTo, mMax;
+
+    public ProgressScaler(ProgressDialogUpdater wrapped, int from, int to, int max) {
+        this.mWrapped = wrapped;
+        this.mFrom = from;
+        this.mTo = to;
+        this.mMax = max;
+    }
+
+    /**
+     * Set progressDialogUpdater of ProgressDialog by sending message to handler on UI thread
+     */
+    public void setProgress(String message, int progress, int max) {
+        mWrapped.setProgress(message, mFrom + progress * (mTo - mFrom) / max, mMax);
+    }
+
+    public void setProgress(int resourceId, int progress, int max) {
+        mWrapped.setProgress(resourceId, progress, mMax);
+    }
+
+    public void setProgress(int progress, int max) {
+        mWrapped.setProgress(progress, max);
+    }
+
+}