Create palette preview for color correction.

Bug: 145968068 Test: make RunSettingsRoboTests ROBOTEST_FILTER=PaletteListViewTest Test: make RunSettingsRoboTests2 Change-Id: If624c8ab5b6c212b5a3ad97ceac57404d34b9deb
2019-12-31 15:51:21 +08:00
parent ae89ecf8d0
commit 556687661c
10 changed files with 589 additions and 20 deletions
--- a/src/com/android/settings/accessibility/PaletteListPreference.java
+++ b/src/com/android/settings/accessibility/PaletteListPreference.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2020 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.settings.accessibility;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewTreeObserver;
+import android.widget.FrameLayout;
+import android.widget.ListView;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceViewHolder;
+
+import com.android.settingslib.widget.R;
+
+/** Preference that easier preview by matching name to color. */
+public class PaletteListPreference extends Preference {
+
+    /**
+     * Constructs a new PaletteListPreference with the given context's theme and the supplied
+     * attribute set.
+     *
+     * @param context The Context this is associated with, through which it can access the current
+     *                theme, resources, etc.
+     * @param attrs The attributes of the XML tag that is inflating the view.
+     */
+    public PaletteListPreference(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    /**
+     * Constructs a new PaletteListPreference with the given context's theme, the supplied
+     * attribute set, and default style attribute.
+     *
+     * @param context The Context this is associated with, through which it can access the
+     *                current theme, resources, etc.
+     * @param attrs The attributes of the XML tag that is inflating the view.
+     * @param defStyleAttr An attribute in the current theme that contains a reference to a style
+     *                     resource that supplies default
+     *                     values for the view. Can be 0 to not look for
+     *                     defaults.
+     */
+    public PaletteListPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        setLayoutResource(R.layout.daltonizer_preview);
+    }
+
+    @Override
+    public void onBindViewHolder(PreferenceViewHolder holder) {
+        super.onBindViewHolder(holder);
+
+        final View rootView = holder.itemView;
+        final ListView listView = rootView.findViewById(R.id.palette_listView);
+        listView.getViewTreeObserver().addOnGlobalLayoutListener(
+                new ViewTreeObserver.OnGlobalLayoutListener() {
+                    @Override
+                    public void onGlobalLayout() {
+                        final int listViewHeight = listView.getMeasuredHeight();
+                        final int listViewWidth = listView.getMeasuredWidth();
+                        // Removes the callback after get result of measure view.
+                        listView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
+
+                        // Resets layout parameters to display whole items from listView.
+                        final FrameLayout.LayoutParams layoutParams =
+                                (FrameLayout.LayoutParams) listView.getLayoutParams();
+                        layoutParams.height = listViewHeight * listView.getAdapter().getCount();
+                        layoutParams.width = listViewWidth;
+                        listView.setLayoutParams(layoutParams);
+                        listView.invalidateViews();
+                    }
+                });
+    }
+}