diff --git a/README.md b/README.md
index 957fff9..909558b 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,8 @@ git clone https://github.com/kr15h/ofxPiMapper.git
 
 Dependencies
 ------------
-None so far.
+ofxUI
+ofxXmlSettings
 
 Compatibility
 ------------
diff --git a/src/ofxSourcesEditor.cpp b/src/ofxSourcesEditor.cpp
index 9a33c87..7ba604b 100644
--- a/src/ofxSourcesEditor.cpp
+++ b/src/ofxSourcesEditor.cpp
@@ -2,15 +2,124 @@
 
 ofxSourcesEditor::ofxSourcesEditor()
 {
-    
+    defImgDir = DEFAULT_IMAGES_DIR;
+    registerAppEvents();
 }
 
 ofxSourcesEditor::~ofxSourcesEditor()
 {
+    unregisterAppEvents();
+    delete gui;
+    while ( images.size() ) {
+        delete images.back();
+        images.pop_back();
+    }
+}
+
+void ofxSourcesEditor::registerAppEvents()
+{
+    ofAddListener(ofEvents().setup, this, &ofxSourcesEditor::setup);
+}
+
+void ofxSourcesEditor::unregisterAppEvents()
+{
+    ofRemoveListener(ofEvents().setup, this, &ofxSourcesEditor::setup);
+}
+
+void ofxSourcesEditor::setup(ofEventArgs& args)
+{
+    gui = new ofxUICanvas();
+    gui->disable();
+    gui->disableAppDrawCallback();
     
+    // read directory contents
+    ofDirectory imgDir;
+    imgDir.listDir(defImgDir);
+    imgDir.sort();
+    
+    vector<string> vnames;
+    
+    for(int i = 0; i < (int)imgDir.size(); i++){
+		//images[i].loadImage(imgDir.getPath(i));
+        vnames.push_back(imgDir.getName(i));
+	}
+    
+    gui->addLabel(defImgDir, OFX_UI_FONT_SMALL);
+    ofxUIRadio *radio = gui->addRadio("VR", vnames, OFX_UI_ORIENTATION_VERTICAL);
+    radio->activateToggle("image0.png");
+    
+    ofAddListener(gui->newGUIEvent,this,&ofxSourcesEditor::guiEvent);
 }
 
 void ofxSourcesEditor::draw()
 {
-    ofDrawBitmapString("Sources Editor", ofPoint(10, 20));
+    gui->draw();
+}
+
+void ofxSourcesEditor::loadImage( string name, string path )
+{
+    images.push_back(new ofImage());
+    images.back()->loadImage(path);
+    
+    imageNames.push_back(name);
+    
+    ofSendMessage("imageLoaded");
+}
+
+void ofxSourcesEditor::disable()
+{
+    gui->disable();
+}
+
+void ofxSourcesEditor::enable()
+{
+    gui->enable();
+}
+
+int ofxSourcesEditor::getLoadedTexCount()
+{
+    return images.size();
+}
+
+ofTexture* ofxSourcesEditor::getTexture(int index)
+{
+    if (index >= images.size()){
+        throw std::runtime_error("Texture index out of bounds.");
+    }
+    
+    return &images[index]->getTextureReference();
+}
+
+void ofxSourcesEditor::guiEvent(ofxUIEventArgs &e)
+{
+	string name = e.widget->getName();
+	int kind = e.widget->getKind();
+    
+    if(kind == OFX_UI_WIDGET_TOGGLE){
+        ofxUIToggle *toggle = (ofxUIToggle *) e.widget;
+        cout << name << "\t value: " << toggle->getValue() << endl;
+    }
+    
+    // search for matching loaded image name
+    for ( int i=0; i<images.size(); i++ ) {
+        cout << "loaded: " << imageNames[i] << endl;
+        if ( imageNames[i] == name ) {
+            // image already loaded
+            ofImage* img = images[i];
+            images.erase(images.begin()+i);
+            images.push_back(img);
+            
+            string imgName = imageNames[i];
+            imageNames.erase(imageNames.begin()+i);
+            imageNames.push_back(imgName);
+            
+            cout << "image already loaded" << endl;
+            ofSendMessage("imageLoaded");
+            return;
+        }
+    }
+    
+    stringstream ss;
+    ss << defImgDir << name;
+    loadImage(name, ss.str());
 }
\ No newline at end of file
diff --git a/src/ofxSourcesEditor.h b/src/ofxSourcesEditor.h
index 150ad1a..8a385bd 100644
--- a/src/ofxSourcesEditor.h
+++ b/src/ofxSourcesEditor.h
@@ -2,6 +2,10 @@
 #define H_OFX_SOURCES_EDITOR
 
 #include "ofGraphics.h"
+#include "ofEvents.h"
+#include "ofxUI.h"
+
+#define DEFAULT_IMAGES_DIR "sources/images/";
 
 class ofxSourcesEditor
 {
@@ -9,10 +13,27 @@ public:
     ofxSourcesEditor();
     ~ofxSourcesEditor();
     
+    void registerAppEvents();
+    void unregisterAppEvents();
+    
+    void setup(ofEventArgs& args);
     void draw();
+    void loadImage( string name, string path );
+    void disable();
+    void enable();
+    
+    int getLoadedTexCount();
+    ofTexture* getTexture(int index);
     
 private:
+    string defImgDir;
+    ofxUICanvas *gui;
+    void guiEvent(ofxUIEventArgs &e);
+    vector<ofImage*> images;
+    vector<string> imageNames;
+    //ofxPanel imgSrcPanel;
     
+    //void onSourceSelect(bool& value);
 };
 
 #endif
\ No newline at end of file
diff --git a/src/ofxSurfaceManager.h b/src/ofxSurfaceManager.h
index 5f14354..e5ebca3 100644
--- a/src/ofxSurfaceManager.h
+++ b/src/ofxSurfaceManager.h
@@ -4,6 +4,7 @@
 #include "ofxBaseSurface.h"
 #include "ofxTriangleSurface.h"
 #include "ofxSurfaceType.h"
+#include "ofEvents.h"
 
 using namespace std;
 
diff --git a/src/ofxSurfaceManagerGui.cpp b/src/ofxSurfaceManagerGui.cpp
index 81a6c3c..766f55b 100644
--- a/src/ofxSurfaceManagerGui.cpp
+++ b/src/ofxSurfaceManagerGui.cpp
@@ -6,11 +6,13 @@ ofxSurfaceManagerGui::ofxSurfaceManagerGui()
     guiMode = ofxGuiMode::NONE;
     bDrag = false;
     registerMouseEvents();
+    ofRegisterGetMessages(this);
 }
 
 ofxSurfaceManagerGui::~ofxSurfaceManagerGui()
 {
     unregisterMouseEvents();
+    ofUnregisterGetMessages(this);
     surfaceManager = NULL;
 }
 
@@ -68,6 +70,12 @@ void ofxSurfaceManagerGui::draw()
         projectionEditor.draw();
         
     } else if ( guiMode == ofxGuiMode::SOURCE_SELECTION ) {
+        // draw projection surfaces first
+        surfaceManager->draw();
+        
+        // highlight selected surface
+        drawSelectedSurfaceHighlight();
+        
         sourcesEditor.draw();
     }
 }
@@ -173,8 +181,16 @@ void ofxSurfaceManagerGui::setMode(int newGuiMode)
     
     guiMode = newGuiMode;
     
-    // refresh texture editor surface reference
-    textureEditor.setSurface(surfaceManager->getSelectedSurface());
+    if ( guiMode == ofxGuiMode::SOURCE_SELECTION ) {
+        sourcesEditor.enable();
+    } else {
+        sourcesEditor.disable();
+    }
+    
+    if ( guiMode == ofxGuiMode::TEXTURE_MAPPING ) {
+        // refresh texture editor surface reference
+        textureEditor.setSurface(surfaceManager->getSelectedSurface());
+    }
 }
 
 void ofxSurfaceManagerGui::drawSelectedSurfaceHighlight()
@@ -212,4 +228,17 @@ void ofxSurfaceManagerGui::startDrag()
 void ofxSurfaceManagerGui::stopDrag()
 {
     bDrag = false;
+}
+
+void ofxSurfaceManagerGui::gotMessage(ofMessage& msg)
+{
+    cout << msg.message << endl;
+    
+    if ( msg.message == "imageLoaded" ) {
+        // assign texture to selected source
+        if (surfaceManager->getSelectedSurface() == NULL){
+            return;
+        }
+        surfaceManager->getSelectedSurface()->setTexture( sourcesEditor.getTexture(sourcesEditor.getLoadedTexCount()-1) );
+    }
 }
\ No newline at end of file
diff --git a/src/ofxSurfaceManagerGui.h b/src/ofxSurfaceManagerGui.h
index 4b24f20..483255b 100644
--- a/src/ofxSurfaceManagerGui.h
+++ b/src/ofxSurfaceManagerGui.h
@@ -30,6 +30,7 @@ public:
     void drawSelectedSurfaceTextureHighlight();
     void startDrag();
     void stopDrag();
+    void gotMessage(ofMessage& msg);
     
 private:
     ofxSurfaceManager* surfaceManager;