Add setting for configuring zoom level on double-tap.

Added a seek bar in Accessibility settings to configure the zoom level
on double-tap. The range is 75-125% with the default of 100% equal to
the display density.

Bug: 5312461
Change-Id: Iaf1b9f6f6659146db4031c5f819ef9cb55695b5c

1 files changed, 12 insertions, 0 deletions

diff --git a/src/com/android/browser/preferences/AccessibilityPreferencesFragment.java b/src/com/android/browser/preferences/AccessibilityPreferencesFragment.java
index 6adfd23..c07c184 100644
--- a/src/com/android/browser/preferences/AccessibilityPreferencesFragment.java
+++ b/src/com/android/browser/preferences/AccessibilityPreferencesFragment.java
@@ -45,6 +45,9 @@ public class AccessibilityPreferencesFragment extends PreferenceFragment
         e = findPreference(PreferenceKeys.PREF_TEXT_ZOOM);
         e.setOnPreferenceChangeListener(this);
         updateTextZoomSummary(e, settings.getTextZoom());
+        e = findPreference(PreferenceKeys.PREF_DOUBLE_TAP_ZOOM);
+        e.setOnPreferenceChangeListener(this);
+        updateDoubleTapZoomSummary(e, settings.getDoubleTapZoom());
         e = findPreference(PreferenceKeys.PREF_INVERTED_CONTRAST);
         e.setOnPreferenceChangeListener(this);
         updateInvertedContrastSummary(e, (int) (settings.getInvertedContrast() * 100));
@@ -59,6 +62,10 @@ public class AccessibilityPreferencesFragment extends PreferenceFragment
         pref.setSummary(mFormat.format(textZoom / 100.0));
     }
 
+    void updateDoubleTapZoomSummary(Preference pref, int doubleTapZoom) {
+        pref.setSummary(mFormat.format(doubleTapZoom / 100.0));
+    }
+
     void updateInvertedContrastSummary(Preference pref, int contrast) {
         pref.setSummary(mFormat.format(contrast / 100.0));
     }
@@ -80,6 +87,11 @@ public class AccessibilityPreferencesFragment extends PreferenceFragment
             updateTextZoomSummary(pref, settings
                     .getAdjustedTextZoom((Integer) objValue));
         }
+        if (PreferenceKeys.PREF_DOUBLE_TAP_ZOOM.equals(pref.getKey())) {
+            BrowserSettings settings = BrowserSettings.getInstance();
+            updateDoubleTapZoomSummary(pref, settings
+                    .getAdjustedDoubleTapZoom((Integer) objValue));
+        }
         if (PreferenceKeys.PREF_INVERTED_CONTRAST.equals(pref.getKey())) {
             updateInvertedContrastSummary(pref,
                     (int) ((10 + (Integer) objValue) * 10));