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app/src/main/java/com/hippo/ehviewer/util/Theme.java

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+/*
+ * Copyright (C) 2014 Hippo Seven
+ *
+ * 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.hippo.ehviewer.util;
+
+import android.content.Context;
+import android.graphics.Color;
+import android.graphics.drawable.ColorDrawable;
+import android.graphics.drawable.GradientDrawable;
+import android.graphics.drawable.StateListDrawable;
+
+public final class Theme {
+
+    public static final int GREY_COLOR = 0xffaaaaaa;
+    public static final ColorDrawable GREY_DRAWABLE =
+            new ColorDrawable(0xffaaaaaa);
+
+    private static final int[] DARK_COLOR_TABLE = {
+        0xffe91e63, 0xff9c27b0, 0xff673ab7,
+        0xff3f51b5, 0xff5677fc, 0xff009688,
+        0xff259b24
+    };
+
+    /**
+     * get darker color of target color, alpha not change
+     * @param color
+     * @return
+     */
+    public static int getDarkerColor(int color) {
+        float[] hsv = new float[3];
+        Color.colorToHSV(color, hsv);
+        hsv[2] *= 0.9f;
+        return Color.HSVToColor(hsv);
+    }
+
+    public static StateListDrawable getClickDrawable(Context context, int color) {
+        StateListDrawable sld = new StateListDrawable();
+        ColorDrawable normal = new ColorDrawable(color);
+        ColorDrawable dark = new ColorDrawable(getDarkerColor(color));
+
+        sld.addState(new int[]{-android.R.attr.state_enabled}, GREY_DRAWABLE);
+        sld.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_selected}, dark);
+        sld.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_focused}, dark);
+        sld.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_pressed}, dark);
+        sld.addState(new int[]{}, normal);
+        return sld;
+    }
+
+    public static StateListDrawable getRadiiClickDrawable(Context context, int color) {
+        int corner = Ui.dp2pix(2);
+        float[] cornerRadii = new float[]{
+                corner, corner, corner, corner, corner, corner, corner, corner};
+
+        StateListDrawable sld = new StateListDrawable();
+        GradientDrawable normal = new GradientDrawable();
+        normal.setShape(GradientDrawable.RECTANGLE);
+        normal.setCornerRadii(cornerRadii);
+        normal.setColor(color);
+        GradientDrawable dark = new GradientDrawable();
+        dark.setShape(GradientDrawable.RECTANGLE);
+        dark.setCornerRadii(cornerRadii);
+        dark.setColor(getDarkerColor(color));
+
+        sld.addState(new int[]{-android.R.attr.state_enabled}, GREY_DRAWABLE);
+        sld.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_selected}, dark);
+        sld.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_focused}, dark);
+        sld.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_pressed}, dark);
+        sld.addState(new int[]{}, normal);
+        return sld;
+    }
+}