Changes

calculatorpp/AndroidManifest.xml

@@ -9,8 +9,9 @@
     <!--TODO: REMOVE IN PRODUCTION-->
     <uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
 
-    <!-- for overlay -->
+    <!-- for onscreen -->
     <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
 
 
     <uses-sdk android:minSdkVersion="4" android:targetSdkVersion="8"/>
@@ -78,6 +79,7 @@
         <receiver android:name=".onscreen.CalculatorOnscreenBroadcastReceiver">
             <intent-filter>
 				<action android:name="org.solovyev.android.calculator.INIT"/>
+				<action android:name="android.intent.action.BOOT_COMPLETED"/>
 				<action android:name="org.solovyev.android.calculator.EDITOR_STATE_CHANGED"/>
                 <action android:name="org.solovyev.android.calculator.DISPLAY_STATE_CHANGED"/>
             </intent-filter>

calculatorpp/misc/other/prepare_avds.sh

@@ -1,25 +1,58 @@
 #!/bin/bash
 
 
-declare -a skins=("WVGA854" "WQVGA400" "HVGA" "WQVGA432" "WVGA800" "QVGA")
+declare -a densities=("160" "213" "240" "320")
+declare -a resolutions=("320x480" "480x640" "480x800" "480x854" "640x960" "1024x600" "1024x768" "1280x768" "1536x1152" "1920x1200")
 declare -a targets=("android-16")
 
 for target in ${targets[@]}
 do
-    for skin in ${skins[@]}
+    for density in ${densities[@]}
     do
-        $ANDROID_HOME/tools/android -s create avd -n AVD_$skin -t $target -b x86 -s $skin --force
+
+        for resolution in ${resolutions[@]}
+        do
+            name="AVD"
+            name="$name$density"
+            name="$name$resolution"
+            name="$name$target"
+
+            echo "Creating AVD $name"
+            echo "Density: $density"
+            echo "Resolution: $resolution"
+            echo "Target: $target"
+
+            $ANDROID_HOME/tools/android -s create avd -n $name -t $target -b x86 --force -s $resolution
+
+            # replace density in config.ini
+            sed -i "s/hw.lcd.density=240/hw.lcd.density=$density/g" $HOME/.android/avd/$name.avd/config.ini
+
+            arr=(${resolution//x/ })
+
+            echo "hw.lcd.width = ${arr[0]}" >> $HOME/.android/avd/$name.avd/config.ini
+            echo "hw.lcd.height = ${arr[1]}" >> $HOME/.android/avd/$name.avd/config.ini
+
+        done
     done
 done
 
 for target in ${targets[@]}
 do
-    for skin in ${skins[@]}
+    for density in ${densities[@]}
     do
-        avdDeviceName=AVD_$skin
+
-        $ANDROID_HOME/tools/emulator -avd $avdDeviceName &
+        for resolution in ${resolutions[@]}
+        do
+            name="AVD"
+            name="$name$density"
+            name="$name$resolution"
+            name="$name$target"
+
+            $ANDROID_HOME/tools/emulator -avd $name &
             $ANDROID_HOME/tools/monkeyrunner ./wait_device.py
             $ANDROID_HOME/platform-tools/adb -s emulator-5554 emu kill
+
+        done
     done
 done
 

calculatorpp/misc/other/remove_avds.sh

@@ -1,15 +1,24 @@
 #!/bin/bash
 
 
-declare -a skins=("WVGA854" "WQVGA400" "HVGA" "WQVGA432" "WVGA800" "QVGA")
+declare -a densities=("160" "213" "240" "320")
+declare -a resolutions=("320x480" "480x640" "480x800" "480x854" "640x960" "1024x600" "1024x768" "1280x768" "1536x1152" "1920x1200")
 declare -a targets=("android-16")
 
 for target in ${targets[@]}
 do
-    for skin in ${skins[@]}
+    for density in ${densities[@]}
     do
-        $ANDROID_HOME/tools/android -s delete avd -n AVD_$skin
+
+        for resolution in ${resolutions[@]}
+        do
+            name="AVD"
+            name="$name$density"
+            name="$name$resolution"
+            name="$name$target"
+
+            $ANDROID_HOME/tools/android -s delete avd -n $name
+
+        done
     done
 done
-
-

calculatorpp/misc/other/take_screenshots.py

@@ -9,7 +9,7 @@ outFilename = sys.argv[2]
 print ''
 print 'Screenshot will be located in ' + outFolder + ' with name ' + outFilename;
 
-apk = '/home/serso/projects/java/android/calculatorpp/calculatorpp/target/calculatorpp-1.5.2-SNAPSHOT.apk'
+apk = '/home/serso/projects/java/android/calculatorpp/calculatorpp/target/calculatorpp.apk'
 package = 'org.solovyev.android.calculator'
 activity = 'org.solovyev.android.calculator.CalculatorActivity'
 deviceName = 'emulator-5554'
@@ -20,7 +20,7 @@ def takeScreenshot (folder, filename):
     return
 
 print 'Waiting for device ' + deviceName + '...'
-device = MonkeyRunner.waitForConnection(30, deviceName)
+device = MonkeyRunner.waitForConnection(50, deviceName)
 
 if device:
     # unlock device
@@ -38,11 +38,8 @@ if device:
     print 'Starting activity ' + runComponent + '...'
     device.startActivity(component=runComponent)
 
-    # close all dialogs
-    device.shell('input keyevent 4')
-
     # sleep while application will be loaded
-    MonkeyRunner.sleep(2);
+    MonkeyRunner.sleep(10);
 
     print 'Taking screenshot...'
     takeScreenshot(outFolder, outFilename + '_' + str(time.time()) );

calculatorpp/misc/other/take_screenshots.sh

@@ -1,15 +1,25 @@
 #!/bin/bash
 
-declare -a skins=("WVGA854" "WQVGA400" "HVGA" "WQVGA432" "WVGA800" "QVGA")
+declare -a densities=("160" "213" "240" "320")
+declare -a resolutions=("320x480" "480x640" "480x800" "480x854" "640x960" "1024x600" "1024x768" "1280x768" "1536x1152" "1920x1200")
 declare -a targets=("android-16")
 
 for target in ${targets[@]}
 do
-    for skin in ${skins[@]}
+    for density in ${densities[@]}
     do
-        avdDeviceName=AVD_$skin
+
-        $ANDROID_HOME/tools/emulator -avd $avdDeviceName &
+        for resolution in ${resolutions[@]}
-        $ANDROID_HOME/tools/monkeyrunner ./take_screenshots.py ~/projects/java/android/calculatorpp/calculatorpp/misc/aux/tmp $avdDeviceName
+        do
+            name="AVD"
+            name="$name$density"
+            name="$name$resolution"
+            name="$name$target"
+
+            $ANDROID_HOME/tools/emulator -avd $name &
+            $ANDROID_HOME/tools/monkeyrunner ./take_screenshots.py ~/projects/java/android/calculatorpp/calculatorpp/misc/other/tmp $name
             $ANDROID_HOME/platform-tools/adb -s emulator-5554 emu kill
+
+        done
     done
 done

calculatorpp/res/values-ru/text_strings.xml

@@ -271,4 +271,8 @@
     <string name="c_app_widget_4x5_name">Калькулятор++ Виджет (4x5)</string>
     <string name="open_onscreen_calculator">Нажмите чтобы открыть калькулятор поверх всех приложений</string>
 
+    <string name="prefs_onscreen_title">Настройки плавающего калькулятора</string>
+    <string name="prefs_onscreen_start_on_boot_title">Запуск после загрузки устройства</string>
+    <string name="prefs_onscreen_start_on_boot_summary">Если включено кнопка плавающего калькулятора будет доступна в панели уведомлений полсе загрузки устройства</string>
+
 </resources>

calculatorpp/res/values/text_strings.xml

@@ -272,4 +272,8 @@
     <string name="c_app_widget_4x5_name">Calculator++ Widget (4x5)</string>
     <string name="open_onscreen_calculator">Click to open on-screen calculator</string>
 
+    <string name="prefs_onscreen_title">On-screen calculator settings</string>
+    <string name="prefs_onscreen_start_on_boot_title">Start on boot</string>
+    <string name="prefs_onscreen_start_on_boot_summary">If checked on-screen calculator will appear in notification bar after device boot</string>
+
 </resources>

calculatorpp/res/xml/preferences_onscreen.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<PreferenceScreen xmlns:a="http://schemas.android.com/apk/res/android">
+
+    <PreferenceScreen a:title="@string/prefs_onscreen_title">
+
+        <org.solovyev.android.ads.AdViewPreference a:layout="@layout/admob_pref"/>
+
+        <android.preference.CheckBoxPreference
+                a:key="onscreen_start_on_boot"
+                a:title="@string/prefs_onscreen_start_on_boot_title"
+                a:summary="@string/prefs_onscreen_start_on_boot_summary"/>
+
+    </PreferenceScreen>
+
+</PreferenceScreen>

calculatorpp/src/main/java/org/solovyev/android/calculator/AbstractCalculatorHelper.java

@@ -1,12 +1,9 @@
 package org.solovyev.android.calculator;
 
-import android.*;
-import android.Manifest;
 import android.app.Activity;
 import android.app.KeyguardManager;
 import android.content.Context;
 import android.content.SharedPreferences;
-import android.content.pm.PackageManager;
 import android.os.Vibrator;
 import android.preference.PreferenceManager;
 import android.util.Log;
@@ -67,9 +64,7 @@ public abstract class AbstractCalculatorHelper implements SharedPreferences.OnSh
         preferences.registerOnSharedPreferenceChangeListener(this);
 
         // let's disable locking of screen for monkeyrunner
-        // NOTE: this code is only for monkeyrunner
+        if (CalculatorApplication.isMonkeyRunner(activity)) {
-        final String permission = Manifest.permission.DISABLE_KEYGUARD;
-        if (activity.checkCallingOrSelfPermission(permission) == PackageManager.PERMISSION_GRANTED) {
             final KeyguardManager km = (KeyguardManager) activity.getSystemService(Context.KEYGUARD_SERVICE);
             km.newKeyguardLock(activity.getClass().getName()).disableKeyguard();
         }

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java

@@ -81,6 +81,12 @@ public class CalculatorActivity extends SherlockFragmentActivity implements Shar
         preferences.registerOnSharedPreferenceChangeListener(this);
 
         Locator.getInstance().getPreferenceService().checkPreferredPreferences(false);
+
+        if ( CalculatorApplication.isMonkeyRunner(this) ) {
+            Locator.getInstance().getKeyboard().buttonPressed("123");
+            Locator.getInstance().getKeyboard().buttonPressed("+");
+            Locator.getInstance().getKeyboard().buttonPressed("321");
+        }
     }
 
     @NotNull
@@ -100,6 +106,8 @@ public class CalculatorActivity extends SherlockFragmentActivity implements Shar
 
         CalculatorPreferences.appVersion.putPreference(preferences, appVersion);
 
+        if (!CalculatorApplication.isMonkeyRunner(context)) {
+
             boolean dialogShown = false;
             if (EqualsTool.areEqual(savedVersion, CalculatorPreferences.appVersion.getDefaultValue())) {
                 // new start
@@ -132,6 +140,7 @@ public class CalculatorActivity extends SherlockFragmentActivity implements Shar
                 }
             }
         }
+    }
 
     private static boolean showSpecialWindow(@NotNull SharedPreferences preferences, @NotNull Preference<Boolean> specialWindowShownPref, int layoutId, int textViewId, @NotNull Context context) {
         boolean result = false;

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorApplication.java

@@ -1,6 +1,8 @@
 package org.solovyev.android.calculator;
 
+import android.content.Context;
 import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
 import android.preference.PreferenceManager;
 import net.robotmedia.billing.BillingController;
 import net.robotmedia.billing.helper.DefaultBillingObserver;
@@ -13,7 +15,6 @@ import org.solovyev.android.ads.AdsController;
 import org.solovyev.android.calculator.external.AndroidExternalListenersContainer;
 import org.solovyev.android.calculator.history.AndroidCalculatorHistory;
 import org.solovyev.android.calculator.model.AndroidCalculatorEngine;
-import org.solovyev.android.calculator.widget.CalculatorWidgetHelper;
 
 /**
  * User: serso
@@ -60,6 +61,7 @@ public class CalculatorApplication extends android.app.Application {
         instance = this;
     }
 
+
     /*
     **********************************************************************
     *
@@ -160,4 +162,8 @@ public class CalculatorApplication extends android.app.Application {
         return instance;
     }
 
+    public static boolean isMonkeyRunner(@NotNull Context context) {
+        // NOTE: this code is only for monkeyrunner
+        return context.checkCallingOrSelfPermission(android.Manifest.permission.DISABLE_KEYGUARD) == PackageManager.PERMISSION_GRANTED;
+    }
 }

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorOnScreenStartActivity.java

@@ -1,21 +0,0 @@
-package org.solovyev.android.calculator;
-
-import android.app.Activity;
-import android.content.Intent;
-import android.os.Bundle;
-import org.solovyev.android.calculator.external.AndroidExternalListenersContainer;
-import org.solovyev.android.calculator.onscreen.CalculatorOnscreenService;
-
-public class CalculatorOnscreenStartActivity extends Activity {
-
-	@Override
-	protected void onCreate(Bundle savedInstanceState) {
-		super.onCreate(savedInstanceState);
-
-		final Intent intent = new Intent(AndroidExternalListenersContainer.INIT_ACTION);
-		intent.setClass(this, CalculatorOnscreenService.class);
-		startService(intent);
-
-		this.finish();
-	}
-}

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorOnscreenStartActivity.java

@@ -1,9 +1,7 @@
 package org.solovyev.android.calculator;
 
 import android.app.Activity;
-import android.content.Intent;
 import android.os.Bundle;
-import org.solovyev.android.calculator.external.AndroidExternalListenersContainer;
 import org.solovyev.android.calculator.onscreen.CalculatorOnscreenService;
 
 public class CalculatorOnscreenStartActivity extends Activity {
@@ -12,9 +10,7 @@ public class CalculatorOnscreenStartActivity extends Activity {
 	protected void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 
-		final Intent intent = new Intent(AndroidExternalListenersContainer.INIT_ACTION);
+        CalculatorOnscreenService.showOnscreenView(this);
-		intent.setClass(this, CalculatorOnscreenService.class);
-		startService(intent);
 
 		this.finish();
 	}

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorPreferences.java

@@ -28,6 +28,10 @@ public final class CalculatorPreferences {
     public static final Preference<Integer> appVersion = new IntegerPreference("application.version", -1);
     public static final Preference<Integer> appOpenedCounter = new IntegerPreference("app_opened_counter", 0);
 
+    public static class OnscreenCalculator {
+        public static final Preference<Boolean> startOnBoot = new BooleanPreference("onscreen_start_on_boot", false);
+    }
+
     public static class Calculations {
 
         public static final Preference<Boolean> calculateOnFly = new BooleanPreference("calculations_calculate_on_fly", true);

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorPreferencesActivity.java

@@ -42,10 +42,11 @@ public class CalculatorPreferencesActivity extends SherlockPreferenceActivity im
         //noinspection deprecation
         addPreferencesFromResource(R.xml.preferences);
         //noinspection deprecation
-        addPreferencesFromResource(R.xml.calculations_preferences);
+        addPreferencesFromResource(R.xml.preferences_calculations);
-        addPreferencesFromResource(R.xml.appearance_preferences);
+        addPreferencesFromResource(R.xml.preferences_appearance);
-        addPreferencesFromResource(R.xml.plot_preferences);
+        addPreferencesFromResource(R.xml.preferences_plot);
-        addPreferencesFromResource(R.xml.other_preferences);
+        addPreferencesFromResource(R.xml.preferences_other);
+        addPreferencesFromResource(R.xml.preferences_onscreen);
 
 		final Preference adFreePreference = findPreference(CalculatorApplication.AD_FREE_P_KEY);
 		adFreePreference.setEnabled(false);

calculatorpp/src/main/java/org/solovyev/android/calculator/external/AndroidExternalListenersContainer.java

@@ -41,6 +41,7 @@ public class AndroidExternalListenersContainer implements CalculatorExternalList
     public static final String EVENT_ID_EXTRA = "eventId";
 
 	public static final String INIT_ACTION = "org.solovyev.android.calculator.INIT";
+	public static final String INIT_ACTION_CREATE_VIEW_EXTRA = "createView";
 
 	public static final String EDITOR_STATE_CHANGED_ACTION = "org.solovyev.android.calculator.EDITOR_STATE_CHANGED";
     public static final String EDITOR_STATE_EXTRA = "editorState";

calculatorpp/src/main/java/org/solovyev/android/calculator/onscreen/CalculatorOnscreenBroadcastReceiver.java

@@ -3,7 +3,10 @@ package org.solovyev.android.calculator.onscreen;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
 import org.jetbrains.annotations.NotNull;
+import org.solovyev.android.calculator.CalculatorPreferences;
 
 /**
 * User: serso
@@ -18,8 +21,15 @@ public final class CalculatorOnscreenBroadcastReceiver extends BroadcastReceiver
     @Override
     public void onReceive(@NotNull Context context,
                           @NotNull Intent intent) {
+        if ( intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED) ) {
+            final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
+            if ( CalculatorPreferences.OnscreenCalculator.startOnBoot.getPreferenceNoError(preferences) ) {
+                CalculatorOnscreenService.showNotification(context);
+            }
+        } else {
             final Intent newIntent = new Intent(intent);
             newIntent.setClass(context, CalculatorOnscreenService.class);
             context.startService(newIntent);
         }
     }
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/onscreen/CalculatorOnscreenService.java

@@ -16,10 +16,7 @@ import org.solovyev.android.calculator.CalculatorDisplayViewState;
 import org.solovyev.android.calculator.CalculatorEditorViewState;
 import org.solovyev.android.calculator.Locator;
 import org.solovyev.android.calculator.R;
-import org.solovyev.android.calculator.external.AndroidExternalListenersContainer;
+import org.solovyev.android.calculator.external.*;
-import org.solovyev.android.calculator.external.DefaultExternalCalculatorIntentHandler;
-import org.solovyev.android.calculator.external.ExternalCalculatorIntentHandler;
-import org.solovyev.android.calculator.external.ExternalCalculatorStateUpdater;
 
 /**
  * User: serso
@@ -32,6 +29,7 @@ public class CalculatorOnscreenService extends Service implements ExternalCalcul
 
     @NotNull
     private final ExternalCalculatorIntentHandler intentHandler = new DefaultExternalCalculatorIntentHandler(this);
+    public static final Class<CalculatorOnscreenBroadcastReceiver> INTENT_LISTENER_CLASS = CalculatorOnscreenBroadcastReceiver.class;
 
     @Nullable
     private static String cursorColor;
@@ -41,6 +39,8 @@ public class CalculatorOnscreenService extends Service implements ExternalCalcul
 
 	private boolean compatibilityStart = true;
 
+    private boolean viewCreated = false;
+
     @Override
     public IBinder onBind(Intent intent) {
         return null;
@@ -49,7 +49,10 @@ public class CalculatorOnscreenService extends Service implements ExternalCalcul
     @Override
     public void onCreate() {
         super.onCreate();
+    }
 
+    private void createView() {
+        if (!viewCreated) {
             final WindowManager wm = ((WindowManager) this.getSystemService(Context.WINDOW_SERVICE));
 
             final DisplayMetrics dm = getResources().getDisplayMetrics();
@@ -71,6 +74,9 @@ public class CalculatorOnscreenService extends Service implements ExternalCalcul
             view.show();
 
             startCalculatorListening();
+
+            viewCreated = true;
+        }
     }
 
     private int getHeight(int width) {
@@ -82,8 +88,8 @@ public class CalculatorOnscreenService extends Service implements ExternalCalcul
     }
 
     @NotNull
-    private Class<?> getIntentListenerClass() {
+    private static Class<?> getIntentListenerClass() {
-        return CalculatorOnscreenBroadcastReceiver.class;
+        return INTENT_LISTENER_CLASS;
     }
 
     private void stopCalculatorListening() {
@@ -137,9 +143,27 @@ public class CalculatorOnscreenService extends Service implements ExternalCalcul
 
 	private void handleStart(@Nullable Intent intent) {
 		if ( intent != null ) {
+
+            if (isInitIntent(intent)) {
+
+                boolean createView = intent.getBooleanExtra(AndroidExternalListenersContainer.INIT_ACTION_CREATE_VIEW_EXTRA, false);
+                if (createView) {
+                    hideNotification();
+                    createView();
+                } else {
+                    showNotification();
+                }
+            }
+
+            if (viewCreated) {
                 intentHandler.onIntent(this, intent);
             }
-		hideNotification();
+
+        }
+	}
+
+    private boolean isInitIntent(@NotNull Intent intent) {
+        return intent.getAction().equals(AndroidExternalListenersContainer.INIT_ACTION);
     }
 
     private void hideNotification() {
@@ -164,12 +188,30 @@ public class CalculatorOnscreenService extends Service implements ExternalCalcul
         builder.setContentTitle(getText(R.string.c_app_name));
         builder.setContentText(getString(R.string.open_onscreen_calculator));
 
-        final Intent intent = new Intent(AndroidExternalListenersContainer.INIT_ACTION);
+        final Intent intent = createShowOnscreenViewIntent(this);
-        intent.setClass(this, getIntentListenerClass());
         builder.setContentIntent(PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT));
 
         final NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
         nm.notify(NOTIFICATION_ID, builder.getNotification());
     }
+
+    public static void showNotification(@NotNull Context context) {
+        final Intent intent = new Intent(AndroidExternalListenersContainer.INIT_ACTION);
+        intent.setClass(context, getIntentListenerClass());
+        context.sendBroadcast(intent);
+    }
+
+    public static void showOnscreenView(@NotNull Context context) {
+        final Intent intent = createShowOnscreenViewIntent(context);
+        context.sendBroadcast(intent);
+    }
+
+    @NotNull
+    private static Intent createShowOnscreenViewIntent(@NotNull Context context) {
+        final Intent intent = new Intent(AndroidExternalListenersContainer.INIT_ACTION);
+        intent.setClass(context, getIntentListenerClass());
+        intent.putExtra(AndroidExternalListenersContainer.INIT_ACTION_CREATE_VIEW_EXTRA, true);
+        return intent;
+    }
 }
 

calculatorpp/src/main/java/org/solovyev/android/calculator/onscreen/CalculatorOnscreenView.java

@@ -8,11 +8,7 @@ import android.view.WindowManager;
 import android.widget.ImageView;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.solovyev.android.calculator.AndroidCalculatorDisplayView;
+import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.AndroidCalculatorEditorView;
-import org.solovyev.android.calculator.CalculatorDisplayViewState;
-import org.solovyev.android.calculator.CalculatorEditorViewState;
-import org.solovyev.android.calculator.R;
 import org.solovyev.android.calculator.widget.WidgetButton;
 
 /**
@@ -333,15 +329,46 @@ public class CalculatorOnscreenView {
 
     private static class WindowDragTouchListener implements View.OnTouchListener {
 
+        /*
+        **********************************************************************
+        *
+        *                           CONSTANTS
+        *
+        **********************************************************************
+        */
+
+        private static final float DIST_EPS = 10f;
+        private static final float DIST_MAX = 100f;
+        private static final long TIME_EPS = 100L;
+
+        /*
+        **********************************************************************
+        *
+        *                           FIELDS
+        *
+        **********************************************************************
+        */
+
+        @NotNull
         private final WindowManager wm;
 
         private float x0;
 
         private float y0;
 
+        private long time = 0;
+
         @NotNull
         private final View view;
 
+        /*
+        **********************************************************************
+        *
+        *                           CONSTRUCTORS
+        *
+        **********************************************************************
+        */
+
         public WindowDragTouchListener(@NotNull WindowManager wm,
                                        @NotNull View view) {
             this.wm = wm;
@@ -364,25 +391,59 @@ public class CalculatorOnscreenView {
                     return true;
 
                 case MotionEvent.ACTION_MOVE:
-                    final float Δx = x1 - x0;
+                    final long currentTime = System.currentTimeMillis();
-                    final float Δy = y1 - y0;
 
-                    final WindowManager.LayoutParams params = (WindowManager.LayoutParams) view.getLayoutParams();
+                    if ( currentTime - time >= TIME_EPS ) {
-
+                        time = currentTime;
-                    //Log.d(TAG, "0:" + toString(x0, y0) + ", 1: " + toString(x1, y1) + ", Δ: " + toString(Δx, Δy) + ", params: " + toString(params.x, params.y));
+                        for (int i = 0; i < event.getHistorySize(); i++) {
-
+                            final float xi = event.getHistoricalX(i);
-                    params.x = (int) (params.x + Δx);
+                            final float yi = event.getHistoricalY(i);
-                    params.y = (int) (params.y + Δy);
+                            processMove(xi, yi);
-
+                        }
-                    wm.updateViewLayout(view, params);
+                        processMove(x1, y1);
-                    x0 = x1;
+                    }
-                    y0 = y1;
                     return true;
             }
 
             return false;
         }
 
+        private void processMove(float x1, float y1) {
+            final float Δx = x1 - x0;
+            final float Δy = y1 - y0;
+
+            final WindowManager.LayoutParams params = (WindowManager.LayoutParams) view.getLayoutParams();
+            //Log.d(TAG, "0:" + toString(x0, y0) + ", 1: " + toString(x1, y1) + ", Δ: " + toString(Δx, Δy) + ", params: " + toString(params.x, params.y));
+
+            boolean xInBounds = isDistanceInBounds(Δx);
+            boolean yInBounds = isDistanceInBounds(Δy);
+            if (xInBounds || yInBounds) {
+
+                if (xInBounds) {
+                    params.x = (int) (params.x + Δx);
+                }
+
+                if (yInBounds) {
+                    params.y = (int) (params.y + Δy);
+                }
+
+                wm.updateViewLayout(view, params);
+
+                if (xInBounds) {
+                    x0 = x1;
+                }
+
+                if (yInBounds) {
+                    y0 = y1;
+                }
+            }
+        }
+
+        private boolean isDistanceInBounds(float δx) {
+            δx = Math.abs(δx);
+            return δx >= DIST_EPS && δx < DIST_MAX;
+        }
+
         @NotNull
         private static String toString(float x, float y) {
             return "(" + formatFloat(x) + ", " + formatFloat(y) + ")";

calculatorpp/src/main/java/org/solovyev/android/calculator/plot/CalculatorPlotPreferenceActivity.java

@@ -16,6 +16,6 @@ public class CalculatorPlotPreferenceActivity extends SherlockPreferenceActivity
         super.onCreate(savedInstanceState);
 
         //noinspection deprecation
-        addPreferencesFromResource(R.xml.plot_preferences);
+        addPreferencesFromResource(R.xml.preferences_plot);
     }
 }