Select and drag just one joint if they are overlaping

src/ofxBaseJoint.cpp

@@ -14,9 +14,9 @@ ofxBaseJoint::~ofxBaseJoint()
 void ofxBaseJoint::mousePressed(int x, int y, int button)
 {
     if ( hitTest(ofVec2f(x, y)) ) {
-        selected = true;
+        //selected = true;
         clickDistance = position - ofVec2f(x, y);
-        startDrag();
+        //startDrag();
     }
 }
 

src/ofxSurfaceGui.cpp

@@ -4,6 +4,8 @@ ofxSurfaceGui::ofxSurfaceGui()
 {
     surface = NULL;
     mode = NONE;
+    bProjectionMappingJointSelected = false;
+    bTextureMappingJointSelected = false;
 }
 
 ofxSurfaceGui::~ofxSurfaceGui()
@@ -56,14 +58,26 @@ void ofxSurfaceGui::mousePressed(int x, int y, int button)
     if (mode == NONE) return;
     
     if (mode == PROJECTION_MAPPING) {
+        bProjectionMappingJointSelected = false;
         for ( int i=0; i<projectionMappingJoints.size(); i++ ) {
             projectionMappingJoints[i].selected = false;
             projectionMappingJoints[i].mousePressed(x, y, button);
+            if ( !isProjectionMappingJointSelected() && projectionMappingJoints[i].hitTest(ofVec2f(x, y)) ) {
+                projectionMappingJoints[i].selected = true;
+                projectionMappingJoints[i].startDrag();
+                bProjectionMappingJointSelected = true;
+            }
         }
     } else if (mode == TEXTURE_MAPPING) {
+        bTextureMappingJointSelected = false;
         for ( int i=0; i<textureMappingJoints.size(); i++ ) {
             textureMappingJoints[i].selected = false;
             textureMappingJoints[i].mousePressed(x, y, button);
+            if ( !isTextureMappingJointSelected() && textureMappingJoints[i].hitTest(ofVec2f(x, y)) ) {
+                textureMappingJoints[i].selected = true;
+                textureMappingJoints[i].startDrag();
+                bTextureMappingJointSelected = true;
+            }
         }
     }
 }
@@ -149,3 +163,13 @@ void ofxSurfaceGui::addNumTextureMappingJoints(int num)
         addTextureMappingJoint();
     }
 }
+
+bool ofxSurfaceGui::isProjectionMappingJointSelected()
+{
+    return bProjectionMappingJointSelected;
+}
+
+bool ofxSurfaceGui::isTextureMappingJointSelected()
+{
+    return bTextureMappingJointSelected;
+}

src/ofxSurfaceGui.h

@@ -34,6 +34,11 @@ private:
     vector<ofxCircleJoint> projectionMappingJoints;
     vector<ofxCircleJoint> textureMappingJoints;
     
+    bool bTextureMappingJointSelected;
+    bool bProjectionMappingJointSelected;
+    bool isProjectionMappingJointSelected();
+    bool isTextureMappingJointSelected();
+    
     void addProjectionMappingJoint();
     void addNumProjectionMappingJoints(int num);
     void addTextureMappingJoint();