From 57596769eedd2f64b3b6f898ca230867fe866e11 Mon Sep 17 00:00:00 2001
From: Tao Gong <tao.gong@uconn.edu>
Date: Mon, 17 Nov 2014 16:28:09 -0500
Subject: [PATCH] Basic drawing, Vertex and Edge.

---
 drawing/Edge.pde          | 13 ++++++++
 drawing/Graph.pde         | 12 ++++++++
 drawing/Vertex.pde        | 29 +++++++++++++++++
 drawing/drawing.pde       | 65 +++++++++++++++++++++++++++++++++++++++
 drawing/sketch.properties |  2 ++
 5 files changed, 121 insertions(+)
 create mode 100644 drawing/Edge.pde
 create mode 100644 drawing/Graph.pde
 create mode 100644 drawing/Vertex.pde
 create mode 100644 drawing/drawing.pde
 create mode 100644 drawing/sketch.properties

diff --git a/drawing/Edge.pde b/drawing/Edge.pde
new file mode 100644
index 0000000..7aabc0e
--- /dev/null
+++ b/drawing/Edge.pde
@@ -0,0 +1,13 @@
+class Edge {
+  Vertex v1,v2;
+  Edge(Vertex _v1, Vertex _v2){
+    v1=_v1;v2=_v2;
+    v1.E.add(this);
+    v2.E.add(this);
+  }
+  void draw(){
+    strokeWeight(2);
+    stroke(0,0,255);
+    line(v1.x,v1.y,v2.x,v2.y);
+  }
+}
diff --git a/drawing/Graph.pde b/drawing/Graph.pde
new file mode 100644
index 0000000..ca9e76a
--- /dev/null
+++ b/drawing/Graph.pde
@@ -0,0 +1,12 @@
+class Graph{
+  ArrayList<Vertex> V=new ArrayList();
+  ArrayList<Edge> E=new ArrayList();
+  boolean ValidNewEdge(Vertex v1,Vertex v2){
+    if(v1==v2)return false;
+    for(Edge i:v1.E){
+      if((i.v1==v1)&&(i.v2==v2))return false;
+      if((i.v2==v1)&&(i.v1==v2))return false;
+    }
+    return true;
+  }
+}
diff --git a/drawing/Vertex.pde b/drawing/Vertex.pde
new file mode 100644
index 0000000..6be53a8
--- /dev/null
+++ b/drawing/Vertex.pde
@@ -0,0 +1,29 @@
+class Vertex{
+  int x,y;
+  boolean mouseover=false;
+  ArrayList<Edge> E=new ArrayList();
+  Vertex(int _x,int _y){
+    x=_x;y=_y;
+  }
+  Vertex(int _x,int _y,boolean _mo){
+    x=_x;y=_y;mouseover=_mo;
+    if(_mo)vertex_under_mouse=this;
+  }
+  void draw(){
+    noStroke();
+    if(mouseover){
+      fill(0,255,0);
+    }else{
+      fill(255,0,0);
+    }
+    ellipse(x,y,Vertex_Rad*2,Vertex_Rad*2);
+  }
+  void checkmouseover(){
+    if(sqrt((mouseX-x)*(mouseX-x)+(mouseY-y)*(mouseY-y))<=Vertex_Rad*2){
+      mouseover=true;
+      vertex_under_mouse=this;
+    }else{
+      mouseover=false;
+    }
+  }
+}
diff --git a/drawing/drawing.pde b/drawing/drawing.pde
new file mode 100644
index 0000000..da26bf0
--- /dev/null
+++ b/drawing/drawing.pde
@@ -0,0 +1,65 @@
+final int DRAW_NORMAL=1;
+final int DRAW_DRAG=2;
+final int Vertex_Rad=8;
+Vertex drag_start;
+Vertex vertex_under_mouse;
+void setup() {
+  size(640, 360);
+  noStroke();
+}
+Graph G=new Graph();
+int draw_state=DRAW_NORMAL;
+
+void draw() {
+  background(255);
+  //Draw everything else
+  //Draw Vertices
+  for(Vertex i:G.V){
+    i.draw();
+  }
+  //Draw Edges
+  strokeWeight(2);
+  for(Edge i:G.E){
+    i.draw();
+  }
+  if(draw_state==DRAW_DRAG){
+    strokeWeight(2);
+    stroke(0,0,255);
+    line(drag_start.x,drag_start.y,mouseX,mouseY);
+    //println("DRAW_DRAG:",drag_start.x,",",drag_start.y,",",mouseX,",",mouseY);
+    //Draw the dragged line;
+  }
+}
+void mouseMoved(){
+  vertex_under_mouse=null;
+  for(Vertex i:G.V){
+    i.checkmouseover();
+  }
+}
+void mouseDragged(){
+  mouseMoved();
+  if(draw_state!=DRAW_DRAG){//start dragging
+    drag_start=vertex_under_mouse;
+    draw_state=DRAW_DRAG;
+  }
+  
+}
+void mousePressed(){
+  if(vertex_under_mouse==null){
+    G.V.add(new Vertex(mouseX, mouseY,true));
+  }
+}
+
+void mouseReleased(){
+  if(draw_state==DRAW_DRAG){
+    draw_state=DRAW_NORMAL;
+    if(vertex_under_mouse!=null){
+      if(G.ValidNewEdge(drag_start,vertex_under_mouse)){
+        G.E.add(new Edge(drag_start,vertex_under_mouse));
+        println("Valid");
+      }else{
+        println("Invalid");
+      }
+    }
+  }
+}
diff --git a/drawing/sketch.properties b/drawing/sketch.properties
new file mode 100644
index 0000000..8630fa2
--- /dev/null
+++ b/drawing/sketch.properties
@@ -0,0 +1,2 @@
+mode.id=processing.mode.java.JavaMode
+mode=Java