Add option for transparent widget background

Closes #58

src/main/java/com/todoroo/astrid/widget/WidgetConfigActivity.java

@@ -45,6 +45,7 @@ public class WidgetConfigActivity extends InjectingListActivity {
     public static final String PREF_HIDE_CHECKBOXES = "widget-hide-checkboxes-";
     public static final String PREF_DARK_THEME = "widget-dark-theme-";
     public static final String PREF_HIDE_HEADER = "widget-hide-header-";
+    public static final String PREF_WIDGET_TRANSPARENT = "widget-transparent-";
 
     int mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
 
@@ -112,8 +113,10 @@ public class WidgetConfigActivity extends InjectingListActivity {
                 CheckBox darkTheme = (CheckBox) findViewById(R.id.darkTheme);
                 CheckBox hideCheckboxes = (CheckBox) findViewById(R.id.hideCheckboxes);
                 CheckBox hideHeader = (CheckBox) findViewById(R.id.hideHeader);
+                CheckBox transparent = (CheckBox) findViewById(R.id.transparentBackground);
                 saveConfiguration(adapter.getSelection(), !hideDueDate.isChecked(),
-                        darkTheme.isChecked(), hideCheckboxes.isChecked(), hideHeader.isChecked());
+                        darkTheme.isChecked(), hideCheckboxes.isChecked(), hideHeader.isChecked(),
+                        transparent.isChecked());
 
                 updateWidget();
 
@@ -147,7 +150,8 @@ public class WidgetConfigActivity extends InjectingListActivity {
     }
 
     private void saveConfiguration(FilterListItem filterListItem, boolean showDueDate,
-                                   boolean darkTheme, boolean hideCheckboxes, boolean hideHeader){
+                                   boolean darkTheme, boolean hideCheckboxes, boolean hideHeader,
+                                   boolean transparent){
         DisplayMetrics metrics = new DisplayMetrics();
         getWindowManager().getDefaultDisplay().getMetrics(metrics);
 
@@ -171,6 +175,7 @@ public class WidgetConfigActivity extends InjectingListActivity {
         preferences.setBoolean(WidgetConfigActivity.PREF_DARK_THEME + mAppWidgetId, darkTheme);
         preferences.setBoolean(WidgetConfigActivity.PREF_HIDE_CHECKBOXES + mAppWidgetId, hideCheckboxes);
         preferences.setBoolean(WidgetConfigActivity.PREF_HIDE_HEADER + mAppWidgetId, hideHeader);
+        preferences.setBoolean(WidgetConfigActivity.PREF_WIDGET_TRANSPARENT + mAppWidgetId, transparent);
 
         if(filterListItem instanceof FilterWithCustomIntent) {
             String flattenedName = ((FilterWithCustomIntent)filterListItem).customTaskList.flattenToString();

src/main/java/com/todoroo/astrid/widget/WidgetUpdateService.java

@@ -105,6 +105,10 @@ public class WidgetUpdateService extends InjectingService {
         if (preferences.getBoolean(WidgetConfigActivity.PREF_HIDE_HEADER + widgetId, false)) {
             views.setViewVisibility(R.id.widget_header, View.GONE);
         }
+        if (preferences.getBoolean(WidgetConfigActivity.PREF_WIDGET_TRANSPARENT + widgetId, false)) {
+            views.setInt(R.id.widget_header, "setBackgroundColor", android.R.color.transparent);
+            views.setInt(R.id.taskbody, "setBackgroundColor", android.R.color.transparent);
+        }
 
         int numberOfTasks = NUM_VISIBLE_TASKS;
 

src/main/java/org/tasks/widget/WidgetHelper.java

@@ -72,6 +72,11 @@ public class WidgetHelper {
         if (preferences.getBoolean(WidgetConfigActivity.PREF_HIDE_HEADER + id, false)) {
             remoteViews.setViewVisibility(R.id.widget_header, View.GONE);
         }
+        if (preferences.getBoolean(WidgetConfigActivity.PREF_WIDGET_TRANSPARENT + id, false)) {
+            remoteViews.setInt(R.id.widget_header, "setBackgroundColor", android.R.color.transparent);
+            remoteViews.setInt(R.id.list_view, "setBackgroundColor", android.R.color.transparent);
+            remoteViews.setInt(R.id.empty_view, "setBackgroundColor", android.R.color.transparent);
+        }
         remoteViews.setTextViewText(R.id.widget_title, filter.title);
         remoteViews.setRemoteAdapter(R.id.list_view, rvIntent);
         remoteViews.setEmptyView(R.id.list_view, R.id.empty_view);

src/main/res/layout/widget_config_activity.xml

@@ -37,6 +37,16 @@
         android:paddingTop="10dp"
         android:paddingBottom="10dp" />
 
+    <CheckBox
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:checked="false"
+        android:id="@+id/transparentBackground"
+        android:text="@string/widget_transparent_background"
+        android:textSize="18sp"
+        android:paddingTop="10dp"
+        android:paddingBottom="10dp" />
+
     <CheckBox
         android:layout_width="wrap_content"
         android:layout_height="match_parent"

src/main/res/values/strings.xml

@@ -116,6 +116,7 @@
     <string name="widget_hide_due_date">Hide due dates</string>
     <string name="widget_hide_checkboxes">Hide checkboxes</string>
     <string name="widget_hide_header">Hide header</string>
+    <string name="widget_transparent_background">Transparent background</string>
 
     <string-array name="sync_SPr_interval_entries">
         <!-- sync_SPr_interval_entries: Synchronization Intervals -->