(Android) set opacity overlay

android/phoenix/res/layout/seek_dialog.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/seekbar_dialog"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical" >
+
+    <SeekBar
+        android:id="@+id/seekbar_bar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:max="100" />
+
+    <TextView
+        android:id="@+id/seekbar_text"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textAppearance="?android:attr/textAppearanceLarge"
+        android:layout_gravity="center" />
+
+</LinearLayout>

android/phoenix/res/xml/prefs.xml

@@ -188,6 +188,10 @@
                     android:targetClass="org.retroarch.browser.OverlayActivity"
                     android:targetPackage="org.retroarch" />
             </Preference>
+            <org.retroarch.browser.SeekbarPreference
+                android:summary="Set the opacity of the touch overlay."
+                android:title="Overlay opacity"
+                android:key="input_overlay_opacity" />
         </PreferenceCategory>
         <PreferenceCategory android:title="Custom Binds">
 	        <PreferenceScreen

android/phoenix/src/org/retroarch/browser/RetroArch.java

@@ -342,6 +342,7 @@ public class RetroArch extends Activity implements
 		if (useOverlay) {
 			String overlayPath = prefs.getString("input_overlay", getCacheDir() + "/Overlays/snes-landscape.cfg");
 			config.setString("input_overlay", overlayPath);
+			config.setDouble("input_overlay_opacity", prefs.getFloat("input_overlay_opacity", 1.0f));
 		} else {
 			config.setString("input_overlay", "");
 		}

android/phoenix/src/org/retroarch/browser/SeekbarPreference.java

@@ -0,0 +1,59 @@
+package org.retroarch.browser;
+
+import org.retroarch.R;
+
+import android.content.Context;
+import android.preference.DialogPreference;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.SeekBar;
+import android.widget.TextView;
+
+public class SeekbarPreference extends DialogPreference implements SeekBar.OnSeekBarChangeListener {
+	float seek_value;
+	SeekBar bar;
+	TextView text;
+	public SeekbarPreference(Context context, AttributeSet attrs) {
+		super(context, attrs);
+	}
+	
+
+	@Override
+	protected View onCreateDialogView()
+	{
+		LayoutInflater inflater = ((LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE));
+		View view = inflater.inflate(R.layout.seek_dialog, null);
+		bar = (SeekBar) view.findViewById(R.id.seekbar_bar);
+		text = (TextView) view.findViewById(R.id.seekbar_text);
+		seek_value = getPersistedFloat(1.0f);
+		int prog = (int) (seek_value * 100);
+		bar.setProgress(prog);
+		text.setText(String.valueOf(prog) + "%");
+		bar.setOnSeekBarChangeListener(this);
+		return view;
+	}
+	
+	@Override
+	protected void onDialogClosed(boolean positiveResult) {
+	   super.onDialogClosed(positiveResult);
+	
+	    if (positiveResult) {
+	    	persistFloat(seek_value);
+	    }
+	}
+
+	@Override
+	public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
+		seek_value = (float) progress / 100.0f;
+		text.setText(String.valueOf((int)(seek_value * 100)) + "%");
+	}
+
+	@Override
+	public void onStartTrackingTouch(SeekBar seekBar) {
+	}
+
+	@Override
+	public void onStopTrackingTouch(SeekBar seekBar) {	
+	}
+}

general.h

@@ -240,6 +240,7 @@ struct settings
       unsigned turbo_duty_cycle;
 
       char overlay[PATH_MAX];
+      float overlay_opacity;
    } input;
 
    char libretro[PATH_MAX];

input/overlay.c

@@ -285,7 +285,7 @@ input_overlay_t *input_overlay_new(const char *overlay)
    ol->iface->enable(ol->iface_data, true);
    ol->enable = true;
 
-   input_overlay_set_alpha_mod(ol, 1.0f);
+   input_overlay_set_alpha_mod(ol, g_settings.input.overlay_opacity);
 
    return ol;
 

settings.c

@@ -233,6 +233,7 @@ void config_set_defaults(void)
    g_settings.input.netplay_client_swap_input = netplay_client_swap_input;
    g_settings.input.turbo_period = turbo_period;
    g_settings.input.turbo_duty_cycle = turbo_duty_cycle;
+   g_settings.input.overlay_opacity = 1.0f;
    g_settings.input.debug_enable = input_debug_enable;
 #ifdef ANDROID
    g_settings.input.autodetect_enable = input_autodetect_enable;
@@ -688,6 +689,7 @@ bool config_load_file(const char *path)
    CONFIG_GET_INT(input.turbo_duty_cycle, "input_duty_cycle");
 
    CONFIG_GET_PATH(input.overlay, "input_overlay");
+   CONFIG_GET_FLOAT(input.overlay_opacity, "input_overlay_opacity");
    CONFIG_GET_BOOL(input.debug_enable, "input_debug_enable");
 #ifdef ANDROID
    CONFIG_GET_BOOL(input.autodetect_enable, "input_autodetect_enable");