Merge pull request #1543 from rohands/issue_mouseover_hints

mouseover hints

1 files changed, 101 insertions, 0 deletions

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/ContentDescriptionHint.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/ContentDescriptionHint.java
new file mode 100644
index 000000000..8e45a20e9
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/util/ContentDescriptionHint.java
@@ -0,0 +1,101 @@
+package org.sufficientlysecure.keychain.ui.util;
+
+/**
+ * Created by rohan on 20/9/15.
+ */
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * 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.
+ */
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.text.TextUtils;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.Toast;
+public class ContentDescriptionHint {
+    private static final int ESTIMATED_TOAST_HEIGHT_DIPS = 48;
+    public static void setup(View view) {
+        view.setOnLongClickListener(new View.OnLongClickListener() {
+            @Override
+            public boolean onLongClick(View view) {
+                return showLongClickText(view, view.getContentDescription());
+            }
+        });
+    }
+
+    public static void setup(View view, final int textResId) {
+        view.setOnLongClickListener(new View.OnLongClickListener() {
+            @Override
+            public boolean onLongClick(View view) {
+                return showLongClickText(view, view.getContext().getString(textResId));
+            }
+        });
+    }
+
+    public static void setup(View view, final CharSequence text) {
+        view.setOnLongClickListener(new View.OnLongClickListener() {
+            @Override
+            public boolean onLongClick(View view) {
+                return showLongClickText(view, text);
+            }
+        });
+    }
+
+    public static void remove(final View view) {
+        view.setOnLongClickListener(null);
+    }
+
+    private static boolean showLongClickText(View view, CharSequence text) {
+        if (TextUtils.isEmpty(text)) {
+            return false;
+        }
+
+        final int[] screenPos = new int[2]; // origin is device display
+        final Rect displayFrame = new Rect(); // includes decorations (e.g. status bar)
+        view.getLocationOnScreen(screenPos);
+        view.getWindowVisibleDisplayFrame(displayFrame);
+
+        final Context context = view.getContext();
+        final int viewWidth = view.getWidth();
+        final int viewHeight = view.getHeight();
+        final int viewCenterX = screenPos[0] + viewWidth / 2;
+        final int screenWidth = context.getResources().getDisplayMetrics().widthPixels;
+        final int estimatedToastHeight = (int) (ESTIMATED_TOAST_HEIGHT_DIPS
+                * context.getResources().getDisplayMetrics().density);
+
+        Toast longClickText = Toast.makeText(context, text, Toast.LENGTH_SHORT);
+        boolean showBelow = screenPos[1] < estimatedToastHeight;
+        if (showBelow) {
+            // Show below
+            // Offsets are after decorations (e.g. status bar) are factored in
+            longClickText.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL,
+                    viewCenterX - screenWidth / 2,
+                    screenPos[1] - displayFrame.top + viewHeight);
+        } else {
+            // Show above
+            // Offsets are after decorations (e.g. status bar) are factored in
+            // NOTE: We can't use Gravity.BOTTOM because when the keyboard is up
+            // its height isn't factored in.
+            longClickText.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL,
+                    viewCenterX - screenWidth / 2,
+                    screenPos[1] - displayFrame.top - estimatedToastHeight);
+        }
+
+        longClickText.show();
+        return true;
+    }
+
+}