From 96998e27a38534626e7bca6054aa8ddb2f8ca4e2 Mon Sep 17 00:00:00 2001
From: John Reck <jreck@google.com>
Date: Tue, 20 Mar 2012 15:59:57 -0700
Subject: Prevent flicker while dragging contrast slider

Change-Id: Ia7b99d4674d4013451477981f89de93b6b28b0ae
---
 src/com/android/browser/preferences/FontSizePreview.java         | 2 +-
 src/com/android/browser/preferences/InvertedContrastPreview.java | 6 ++++--
 src/com/android/browser/preferences/WebViewPreview.java          | 6 +++---
 3 files changed, 8 insertions(+), 6 deletions(-)

(limited to 'src/com/android/browser/preferences')

diff --git a/src/com/android/browser/preferences/FontSizePreview.java b/src/com/android/browser/preferences/FontSizePreview.java
index 91ecb0010..8825f3d85 100644
--- a/src/com/android/browser/preferences/FontSizePreview.java
+++ b/src/com/android/browser/preferences/FontSizePreview.java
@@ -54,7 +54,7 @@ public class FontSizePreview extends WebViewPreview {
     }
 
     @Override
-    protected void updatePreview() {
+    protected void updatePreview(boolean forceReload) {
         if (mWebView == null) return;
 
         WebSettings ws = mWebView.getSettings();
diff --git a/src/com/android/browser/preferences/InvertedContrastPreview.java b/src/com/android/browser/preferences/InvertedContrastPreview.java
index ba004213b..ed6eadf3c 100644
--- a/src/com/android/browser/preferences/InvertedContrastPreview.java
+++ b/src/com/android/browser/preferences/InvertedContrastPreview.java
@@ -74,7 +74,7 @@ public class InvertedContrastPreview extends WebViewPreview {
     }
 
     @Override
-    protected void updatePreview() {
+    protected void updatePreview(boolean forceReload) {
         if (mWebView == null) return;
 
         WebSettingsClassic ws = WebViewClassic.fromWebView(mWebView).getSettings();
@@ -83,7 +83,9 @@ public class InvertedContrastPreview extends WebViewPreview {
                 bs.useInvertedRendering() ? "true" : "false");
         ws.setProperty(WebViewProperties.gfxInvertedScreenContrast,
                 Float.toString(bs.getInvertedContrast()));
-        mWebView.loadData(mHtml, "text/html", null);
+        if (forceReload) {
+            mWebView.loadData(mHtml, "text/html", null);
+        }
     }
 
 }
diff --git a/src/com/android/browser/preferences/WebViewPreview.java b/src/com/android/browser/preferences/WebViewPreview.java
index a3c19a45f..1f938f051 100644
--- a/src/com/android/browser/preferences/WebViewPreview.java
+++ b/src/com/android/browser/preferences/WebViewPreview.java
@@ -53,7 +53,7 @@ public abstract class WebViewPreview extends Preference
         setLayoutResource(R.layout.webview_preview);
     }
 
-    protected abstract void updatePreview();
+    protected abstract void updatePreview(boolean forceReload);
 
     protected void setupWebView(WebView view) {}
 
@@ -77,7 +77,7 @@ public abstract class WebViewPreview extends Preference
     protected void onBindView(View view) {
         super.onBindView(view);
         mWebView = (WebView) view.findViewById(R.id.webview);
-        updatePreview();
+        updatePreview(true);
     }
 
     @Override
@@ -95,7 +95,7 @@ public abstract class WebViewPreview extends Preference
     @Override
     public void onSharedPreferenceChanged(
             SharedPreferences sharedPreferences, String key) {
-        updatePreview();
+        updatePreview(false);
     }
 
 }
-- 
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