From 9a90f8db00e1c54c1f1f51083d0eabe184201d2c Mon Sep 17 00:00:00 2001
From: Lonami Exo <totufals@hotmail.com>
Date: Sun, 4 Dec 2016 15:57:33 +0100
Subject: [PATCH 1/3] Added clear color (implements and closes #6)

---
 .../com/simplemobiletools/draw/MyCanvas.java    | 17 ++++++++++++++++-
 .../draw/activities/MainActivity.java           | 14 +++++++++++++-
 2 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/app/src/main/java/com/simplemobiletools/draw/MyCanvas.java b/app/src/main/java/com/simplemobiletools/draw/MyCanvas.java
index 607712d..9072c21 100644
--- a/app/src/main/java/com/simplemobiletools/draw/MyCanvas.java
+++ b/app/src/main/java/com/simplemobiletools/draw/MyCanvas.java
@@ -14,6 +14,8 @@ import java.util.LinkedHashMap;
 import java.util.Map;
 
 public class MyCanvas extends View {
+    private Paint mBackgroundPaint;
+
     private Paint mPaint;
     private Path mPath;
     private Map<Path, Integer> mPaths;
@@ -28,6 +30,10 @@ public class MyCanvas extends View {
     public MyCanvas(Context context, AttributeSet attrs) {
         super(context, attrs);
 
+        mBackgroundPaint = new Paint();
+        mBackgroundPaint.setColor(Color.WHITE);
+        mBackgroundPaint.setStyle(Paint.Style.FILL);
+
         mPath = new Path();
         mPaint = new Paint();
         mPaint.setColor(Color.BLACK);
@@ -60,6 +66,10 @@ public class MyCanvas extends View {
         invalidate();
     }
 
+    public int getBackgroundColor() {
+        return mBackgroundPaint.getColor();
+    }
+
     public void setColor(int newColor) {
         mColor = newColor;
     }
@@ -76,6 +86,9 @@ public class MyCanvas extends View {
     protected void onDraw(Canvas canvas) {
         super.onDraw(canvas);
 
+        // Clear canvas background
+        canvas.drawRect(0, 0, canvas.getWidth(), canvas.getHeight(), mBackgroundPaint);
+
         for (Map.Entry<Path, Integer> entry : mPaths.entrySet()) {
             mPaint.setColor(entry.getValue());
             canvas.drawPath(entry.getKey(), mPaint);
@@ -85,7 +98,9 @@ public class MyCanvas extends View {
         canvas.drawPath(mPath, mPaint);
     }
 
-    public void clearCanvas(){
+    public void clearCanvas(int color) {
+        mBackgroundPaint.setColor(color);
+
         mPath.reset();
         mPaths.clear();
         pathsUpdated();
diff --git a/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java b/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java
index 63b9c00..b1ab380 100644
--- a/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java
+++ b/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java
@@ -85,7 +85,19 @@ public class MainActivity extends SimpleActivity implements MyCanvas.PathsChange
                 startActivity(new Intent(getApplicationContext(), SettingsActivity.class));
                 return true;
             case R.id.clear:
-                mMyCanvas.clearCanvas();
+                AmbilWarnaDialog dialog = new AmbilWarnaDialog(this, mMyCanvas.getBackgroundColor(),
+                        new AmbilWarnaDialog.OnAmbilWarnaListener() {
+                    @Override
+                    public void onCancel(AmbilWarnaDialog dialog) {
+                    }
+
+                    @Override
+                    public void onOk(AmbilWarnaDialog dialog, int pickedColor) {
+                        mMyCanvas.clearCanvas(pickedColor);
+                    }
+                });
+
+                dialog.show();
                 return true;
             case R.id.about:
                 startActivity(new Intent(getApplicationContext(), AboutActivity.class));

From f8bd541f9acf91b6a75d620bedcdb6bbe948cb5a Mon Sep 17 00:00:00 2001
From: Lonami Exo <totufals@hotmail.com>
Date: Sun, 4 Dec 2016 17:40:13 +0100
Subject: [PATCH 2/3] Separated background color functionality from Clear
 action

---
 .../com/simplemobiletools/draw/MyCanvas.java  | 17 +-------------
 .../draw/activities/MainActivity.java         | 23 +++++++++++--------
 app/src/main/res/menu/menu.xml                |  4 ++++
 app/src/main/res/values-es/strings.xml        |  1 +
 app/src/main/res/values/strings.xml           |  1 +
 5 files changed, 21 insertions(+), 25 deletions(-)

diff --git a/app/src/main/java/com/simplemobiletools/draw/MyCanvas.java b/app/src/main/java/com/simplemobiletools/draw/MyCanvas.java
index 9072c21..ab32d8a 100644
--- a/app/src/main/java/com/simplemobiletools/draw/MyCanvas.java
+++ b/app/src/main/java/com/simplemobiletools/draw/MyCanvas.java
@@ -14,8 +14,6 @@ import java.util.LinkedHashMap;
 import java.util.Map;
 
 public class MyCanvas extends View {
-    private Paint mBackgroundPaint;
-
     private Paint mPaint;
     private Path mPath;
     private Map<Path, Integer> mPaths;
@@ -30,10 +28,6 @@ public class MyCanvas extends View {
     public MyCanvas(Context context, AttributeSet attrs) {
         super(context, attrs);
 
-        mBackgroundPaint = new Paint();
-        mBackgroundPaint.setColor(Color.WHITE);
-        mBackgroundPaint.setStyle(Paint.Style.FILL);
-
         mPath = new Path();
         mPaint = new Paint();
         mPaint.setColor(Color.BLACK);
@@ -66,10 +60,6 @@ public class MyCanvas extends View {
         invalidate();
     }
 
-    public int getBackgroundColor() {
-        return mBackgroundPaint.getColor();
-    }
-
     public void setColor(int newColor) {
         mColor = newColor;
     }
@@ -86,9 +76,6 @@ public class MyCanvas extends View {
     protected void onDraw(Canvas canvas) {
         super.onDraw(canvas);
 
-        // Clear canvas background
-        canvas.drawRect(0, 0, canvas.getWidth(), canvas.getHeight(), mBackgroundPaint);
-
         for (Map.Entry<Path, Integer> entry : mPaths.entrySet()) {
             mPaint.setColor(entry.getValue());
             canvas.drawPath(entry.getKey(), mPaint);
@@ -98,9 +85,7 @@ public class MyCanvas extends View {
         canvas.drawPath(mPath, mPaint);
     }
 
-    public void clearCanvas(int color) {
-        mBackgroundPaint.setColor(color);
-
+    public void clearCanvas() {
         mPath.reset();
         mPaths.clear();
         pathsUpdated();
diff --git a/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java b/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java
index b1ab380..39dcb42 100644
--- a/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java
+++ b/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java
@@ -5,6 +5,7 @@ import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
 import android.graphics.Color;
+import android.graphics.drawable.ColorDrawable;
 import android.media.MediaScannerConnection;
 import android.net.Uri;
 import android.os.Bundle;
@@ -85,17 +86,21 @@ public class MainActivity extends SimpleActivity implements MyCanvas.PathsChange
                 startActivity(new Intent(getApplicationContext(), SettingsActivity.class));
                 return true;
             case R.id.clear:
-                AmbilWarnaDialog dialog = new AmbilWarnaDialog(this, mMyCanvas.getBackgroundColor(),
+                mMyCanvas.clearCanvas();
+                return true;
+            case R.id.change_background:
+                int oldColor = ((ColorDrawable)mMyCanvas.getBackground()).getColor();
+                AmbilWarnaDialog dialog = new AmbilWarnaDialog(this, oldColor,
                         new AmbilWarnaDialog.OnAmbilWarnaListener() {
-                    @Override
-                    public void onCancel(AmbilWarnaDialog dialog) {
-                    }
+                            @Override
+                            public void onCancel(AmbilWarnaDialog dialog) {
+                            }
 
-                    @Override
-                    public void onOk(AmbilWarnaDialog dialog, int pickedColor) {
-                        mMyCanvas.clearCanvas(pickedColor);
-                    }
-                });
+                            @Override
+                            public void onOk(AmbilWarnaDialog dialog, int pickedColor) {
+                                mMyCanvas.setBackgroundColor(pickedColor);
+                            }
+                        });
 
                 dialog.show();
                 return true;
diff --git a/app/src/main/res/menu/menu.xml b/app/src/main/res/menu/menu.xml
index 38445c6..51b0885 100644
--- a/app/src/main/res/menu/menu.xml
+++ b/app/src/main/res/menu/menu.xml
@@ -15,6 +15,10 @@
         android:id="@+id/clear"
         android:title="@string/clear"
         app:showAsAction="never"/>
+    <item
+        android:id="@+id/change_background"
+        android:title="@string/change_background"
+        app:showAsAction="never"/>
     <item
         android:id="@+id/settings"
         android:title="@string/settings"
diff --git a/app/src/main/res/values-es/strings.xml b/app/src/main/res/values-es/strings.xml
index 1b1fab6..2b43a4f 100644
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@@ -17,6 +17,7 @@
     <string name="settings">Ajustes</string>
     <string name="dark_theme">Tema oscuro</string>
     <string name="clear">Limpiar</string>
+    <string name="change_background">Cambiar fondo</string>
 
     <!-- About -->
     <string name="about">Acerca de</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 80ab415..eca8301 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -17,6 +17,7 @@
     <string name="settings">Settings</string>
     <string name="dark_theme">Dark theme</string>
     <string name="clear">Clear</string>
+    <string name="change_background">Change background</string>
 
     <!-- About -->
     <string name="about">About</string>

From e6a12682072070381f70013437f7a2144ce59e88 Mon Sep 17 00:00:00 2001
From: Lonami Exo <totufals@hotmail.com>
Date: Sun, 4 Dec 2016 18:00:50 +0100
Subject: [PATCH 3/3] Changed Undo arrow color based on the selected background

---
 .../com/simplemobiletools/draw/Utils.java     |  18 ++++++++++++++++++
 .../draw/activities/MainActivity.java         |   6 ++++++
 app/src/main/res/layout/activity_main.xml     |   2 +-
 .../mipmap-hdpi/{undo.png => undo_black.png}  | Bin
 app/src/main/res/mipmap-hdpi/undo_white.png   | Bin 0 -> 477 bytes
 .../mipmap-mdpi/{undo.png => undo_black.png}  | Bin
 app/src/main/res/mipmap-mdpi/undo_white.png   | Bin 0 -> 339 bytes
 .../mipmap-xhdpi/{undo.png => undo_black.png} | Bin
 app/src/main/res/mipmap-xhdpi/undo_white.png  | Bin 0 -> 606 bytes
 .../{undo.png => undo_black.png}              | Bin
 app/src/main/res/mipmap-xxhdpi/undo_white.png | Bin 0 -> 894 bytes
 .../{undo.png => undo_black.png}              | Bin
 .../main/res/mipmap-xxxhdpi/undo_white.png    | Bin 0 -> 1169 bytes
 13 files changed, 25 insertions(+), 1 deletion(-)
 rename app/src/main/res/mipmap-hdpi/{undo.png => undo_black.png} (100%)
 create mode 100644 app/src/main/res/mipmap-hdpi/undo_white.png
 rename app/src/main/res/mipmap-mdpi/{undo.png => undo_black.png} (100%)
 create mode 100644 app/src/main/res/mipmap-mdpi/undo_white.png
 rename app/src/main/res/mipmap-xhdpi/{undo.png => undo_black.png} (100%)
 create mode 100644 app/src/main/res/mipmap-xhdpi/undo_white.png
 rename app/src/main/res/mipmap-xxhdpi/{undo.png => undo_black.png} (100%)
 create mode 100644 app/src/main/res/mipmap-xxhdpi/undo_white.png
 rename app/src/main/res/mipmap-xxxhdpi/{undo.png => undo_black.png} (100%)
 create mode 100644 app/src/main/res/mipmap-xxxhdpi/undo_white.png

diff --git a/app/src/main/java/com/simplemobiletools/draw/Utils.java b/app/src/main/java/com/simplemobiletools/draw/Utils.java
index ecdea08..7115145 100644
--- a/app/src/main/java/com/simplemobiletools/draw/Utils.java
+++ b/app/src/main/java/com/simplemobiletools/draw/Utils.java
@@ -1,10 +1,28 @@
 package com.simplemobiletools.draw;
 
 import android.content.Context;
+import android.graphics.Color;
 import android.widget.Toast;
 
 public class Utils {
+    private final static double BRIGHTNESS_CUTOFF = 130.0;
+
     public static void showToast(Context cxt, int msgId) {
         Toast.makeText(cxt, cxt.getResources().getString(msgId), Toast.LENGTH_SHORT).show();
     }
+
+    // Used to determine the best foreground color (black or white) given a background color
+    public static boolean shouldUseWhite(int color) {
+        float r, g, b;
+        r = Color.red(color);
+        g = Color.green(color);
+        b = Color.blue(color);
+
+        double brightness = Math.sqrt(
+                r * r * .299 +
+                g * g * .587 +
+                b * b * .114);
+
+        return brightness < BRIGHTNESS_CUTOFF;
+    }
 }
diff --git a/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java b/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java
index 39dcb42..6a4aafb 100644
--- a/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java
+++ b/app/src/main/java/com/simplemobiletools/draw/activities/MainActivity.java
@@ -19,6 +19,7 @@ import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.EditText;
+import android.widget.ImageView;
 import android.widget.Toast;
 
 import com.simplemobiletools.draw.Config;
@@ -98,6 +99,11 @@ public class MainActivity extends SimpleActivity implements MyCanvas.PathsChange
 
                             @Override
                             public void onOk(AmbilWarnaDialog dialog, int pickedColor) {
+                                if (Utils.shouldUseWhite(pickedColor)) {
+                                    ((ImageView)mUndoBtn).setImageResource(R.mipmap.undo_white);
+                                } else {
+                                    ((ImageView)mUndoBtn).setImageResource(R.mipmap.undo_black);
+                                }
                                 mMyCanvas.setBackgroundColor(pickedColor);
                             }
                         });
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index e40ba7d..ab8c976 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -23,7 +23,7 @@
         android:layout_alignParentRight="true"
         android:layout_below="@id/color_picker"
         android:padding="@dimen/icon_padding"
-        android:src="@mipmap/undo"
+        android:src="@mipmap/undo_black"
         android:visibility="gone"/>
 
 </RelativeLayout>
diff --git a/app/src/main/res/mipmap-hdpi/undo.png b/app/src/main/res/mipmap-hdpi/undo_black.png
similarity index 100%
rename from app/src/main/res/mipmap-hdpi/undo.png
rename to app/src/main/res/mipmap-hdpi/undo_black.png
diff --git a/app/src/main/res/mipmap-hdpi/undo_white.png b/app/src/main/res/mipmap-hdpi/undo_white.png
new file mode 100644
index 0000000000000000000000000000000000000000..1e1e3d866125bbeceb283decc5ed3b9f0f696bbe
GIT binary patch
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diff --git a/app/src/main/res/mipmap-mdpi/undo.png b/app/src/main/res/mipmap-mdpi/undo_black.png
similarity index 100%
rename from app/src/main/res/mipmap-mdpi/undo.png
rename to app/src/main/res/mipmap-mdpi/undo_black.png
diff --git a/app/src/main/res/mipmap-mdpi/undo_white.png b/app/src/main/res/mipmap-mdpi/undo_white.png
new file mode 100644
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GIT binary patch
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diff --git a/app/src/main/res/mipmap-xhdpi/undo.png b/app/src/main/res/mipmap-xhdpi/undo_black.png
similarity index 100%
rename from app/src/main/res/mipmap-xhdpi/undo.png
rename to app/src/main/res/mipmap-xhdpi/undo_black.png
diff --git a/app/src/main/res/mipmap-xhdpi/undo_white.png b/app/src/main/res/mipmap-xhdpi/undo_white.png
new file mode 100644
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similarity index 100%
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diff --git a/app/src/main/res/mipmap-xxxhdpi/undo.png b/app/src/main/res/mipmap-xxxhdpi/undo_black.png
similarity index 100%
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diff --git a/app/src/main/res/mipmap-xxxhdpi/undo_white.png b/app/src/main/res/mipmap-xxxhdpi/undo_white.png
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