From f085e9481f9c6c8fe8ea04bf44285eaeb70d4607 Mon Sep 17 00:00:00 2001
From: Sergey Solovyev <se.solovyev@gmail.com>
Date: Wed, 21 Nov 2012 16:38:11 +0400
Subject: [PATCH] Calculator Overlay

---
 calculatorpp/res/layout/overlay_header.xml    | 50 +++++++-----
 .../overlay/CalculatorOverlayService.java     | 76 ++++++++++++++-----
 2 files changed, 90 insertions(+), 36 deletions(-)

diff --git a/calculatorpp/res/layout/overlay_header.xml b/calculatorpp/res/layout/overlay_header.xml
index 33eb693a..a74112e8 100644
--- a/calculatorpp/res/layout/overlay_header.xml
+++ b/calculatorpp/res/layout/overlay_header.xml
@@ -1,22 +1,36 @@
 <?xml version="1.0" encoding="utf-8"?>
 
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-			  a:orientation="horizontal"
+<RelativeLayout xmlns:a="http://schemas.android.com/apk/res/android"
+				a:layout_width="match_parent"
+				a:layout_height="30dp">
+
+	<LinearLayout a:id="@+id/overlay_header_buttons"
+				  a:layout_width="wrap_content"
+				  a:layout_height="match_parent"
+				  a:layout_alignParentRight="true">
+
+		<Button a:id="@+id/overlay_hide_button"
+				a:layout_width="wrap_content"
+				a:layout_height="match_parent"
+				a:layout_weight="0"
+				a:padding="6dp"
+				style="@style/widget_metro_control_button_style"
+				a:text="_"/>
+
+		<Button a:id="@+id/overlay_close_button"
+				a:layout_width="wrap_content"
+				a:layout_height="match_parent"
+				a:layout_weight="0"
+				a:padding="6dp"
+				style="@style/widget_metro_control_button_style"
+				a:text="x"/>
+
+	</LinearLayout>
+
+	<TextView a:id="@+id/overlay_title"
+			  a:text="@string/c_app_name"
 			  a:layout_width="match_parent"
-			  a:layout_height="wrap_content"
-			  a:gravity="right">
+			  a:layout_height="match_parent"
+			  a:layout_toLeftOf="@id/overlay_header_buttons"/>
 
-	<Button a:id="@+id/overlay_hide_button"
-			a:layout_width="wrap_content"
-			a:layout_height="wrap_content"
-			style="?cpp_operation_button_style"
-			a:text="_"/>
-
-
-	<Button a:id="@+id/overlay_close_button"
-			a:layout_width="wrap_content"
-			a:layout_height="wrap_content"
-			style="?cpp_operation_button_style"
-			a:text="x"/>
-
-</LinearLayout>
\ No newline at end of file
+</RelativeLayout>
\ No newline at end of file
diff --git a/calculatorpp/src/main/java/org/solovyev/android/calculator/overlay/CalculatorOverlayService.java b/calculatorpp/src/main/java/org/solovyev/android/calculator/overlay/CalculatorOverlayService.java
index 5d67bb6c..5ea34caf 100644
--- a/calculatorpp/src/main/java/org/solovyev/android/calculator/overlay/CalculatorOverlayService.java
+++ b/calculatorpp/src/main/java/org/solovyev/android/calculator/overlay/CalculatorOverlayService.java
@@ -7,6 +7,7 @@ import android.graphics.PixelFormat;
 import android.os.IBinder;
 import android.text.Html;
 import android.view.LayoutInflater;
+import android.view.MotionEvent;
 import android.view.View;
 import android.view.WindowManager;
 import android.widget.TextView;
@@ -29,7 +30,7 @@ import org.solovyev.android.calculator.widget.WidgetButton;
 public class CalculatorOverlayService extends Service implements ExternalCalculatorStateUpdater {
 
     @Nullable
-    private View view;
+    private View onscreenView;
 
     @NotNull
     private final ExternalCalculatorIntentHandler intentHandler = new DefaultExternalCalculatorIntentHandler(this);
@@ -45,19 +46,13 @@ public class CalculatorOverlayService extends Service implements ExternalCalcula
     @Override
     public void onCreate() {
         super.onCreate();
+		final WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
 
-        final LayoutInflater layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-        view = layoutInflater.inflate(R.layout.overlay_layout, null);
-
-        final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
-                300,
-                450,
-                WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
-                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL|WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
-                PixelFormat.TRANSLUCENT);
+		final LayoutInflater layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        onscreenView = layoutInflater.inflate(R.layout.overlay_layout, null);
 
         for (final WidgetButton widgetButton : WidgetButton.values()) {
-            final View button = view.findViewById(widgetButton.getButtonId());
+            final View button = onscreenView.findViewById(widgetButton.getButtonId());
             if (button != null) {
                 button.setOnClickListener(new View.OnClickListener() {
                     @Override
@@ -68,15 +63,60 @@ public class CalculatorOverlayService extends Service implements ExternalCalcula
             }
         }
 
-		view.findViewById(R.id.overlay_close_button).setOnClickListener(new View.OnClickListener() {
+		onscreenView.findViewById(R.id.overlay_close_button).setOnClickListener(new View.OnClickListener() {
 			@Override
 			public void onClick(View v) {
 				stopService(new Intent(getApplicationContext(), CalculatorOverlayService.class));
 			}
 		});
 
-        final WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
-        wm.addView(view, params);
+		final TextView overlayTitleTextView = (TextView) onscreenView.findViewById(R.id.overlay_title);
+		overlayTitleTextView.setOnTouchListener(new View.OnTouchListener() {
+
+			private volatile boolean move = false;
+
+			private volatile float startDragX;
+
+			private volatile float startDragY;
+
+			@Override
+			public boolean onTouch(View v, MotionEvent event) {
+				switch (event.getAction()) {
+					case MotionEvent.ACTION_DOWN:
+					case MotionEvent.ACTION_MOVE:
+						if (move) {
+							int x = (int) (onscreenView.getX() - startDragX + event.getX());
+							int y = (int) (onscreenView.getY() - startDragY + event.getY());
+							overlayTitleTextView.setText("Calculator++: (" + x + ", " + y + ")");
+							final WindowManager.LayoutParams params = (WindowManager.LayoutParams) onscreenView.getLayoutParams();
+							params.x = x;
+							params.y = y;
+							// todo serso: add small delay
+							wm.updateViewLayout(onscreenView, params);
+						} else {
+							startDragX = event.getX();
+							startDragY = event.getY();
+							move = true;
+						}
+						return true;
+				}
+
+				move = false;
+				startDragX = 0;
+				startDragY = 0;
+
+				return false;
+			}
+		});
+
+		final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
+				300,
+				450,
+				WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
+				WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL|WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
+				PixelFormat.TRANSLUCENT);
+
+        wm.addView(onscreenView, params);
 
         startCalculatorListening();
     }
@@ -98,9 +138,9 @@ public class CalculatorOverlayService extends Service implements ExternalCalcula
     public void onDestroy() {
         stopCalculatorListening();
 
-        if (view != null) {
-            ((WindowManager) getSystemService(WINDOW_SERVICE)).removeView(view);
-            view = null;
+        if (onscreenView != null) {
+            ((WindowManager) getSystemService(WINDOW_SERVICE)).removeView(onscreenView);
+            onscreenView = null;
         }
 
         super.onDestroy();
@@ -108,7 +148,7 @@ public class CalculatorOverlayService extends Service implements ExternalCalcula
 
     @Override
     public void updateState(@NotNull Context context, @NotNull CalculatorEditorViewState editorState, @NotNull CalculatorDisplayViewState displayState) {
-        final View root = this.view;
+        final View root = this.onscreenView;
         if (root != null) {
             updateDisplayState(context, root, displayState);
             updateEditorState(context, root, editorState);