997 lines
38 KiB
JavaScript
997 lines
38 KiB
JavaScript
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(function(window){
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// this serves as the end of an edge when creating a link
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function EdgeEnd(pos_x,pos_y){
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this.x = pos_x;
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this.y = pos_y;
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this.get_pos = function(){
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return new Vec2(this.x,this.y);
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}
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}
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// A close button,
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// if entity_type == "node":
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// GraphNode.destruction_callback(entity) is called where entity is a node.
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// If it returns true the node and all connected edges are destroyed.
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// if entity_type == "edge":
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// GraphEdge.destruction_callback(entity) is called where entity is an edge
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// If it returns true the edge is destroyed
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// pos_x,pos_y is the relative position of the close button to the entity position (entity.get_pos())
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function CloseButton(graph, entity, entity_type, pos_x,pos_y){
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var self = this;
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var visible = false;
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var close_button_radius = graph.style.close_button_radius || 8;
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var close_circle = graph.r.circle( entity.get_pos().x + pos_x,
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entity.get_pos().y + pos_y,
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close_button_radius );
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//the outer gray circle
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close_circle.attr({ 'opacity': 0,
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'fill': graph.style.close_button_color || "black",
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'cursor': 'pointer',
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'stroke': 'none' });
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close_circle.transform(graph.get_transform());
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graph.set_scrolling(close_circle);
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//the 'x' inside the circle
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var close_label = graph.r.text( entity.get_pos().x + pos_x, entity.get_pos().y + pos_y,"x");
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close_label.attr({ 'fill': graph.style.close_button_x_color || "white",
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'font-size': close_button_radius,
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'cursor': 'pointer' });
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close_label.transform(graph.get_transform());
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graph.set_scrolling(close_label);
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// the dummy_circle is used to catch events, and avoid hover in/out madness
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// between the 'x' and the button
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var dummy_circle = graph.r.circle( entity.get_pos().x + pos_x,
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entity.get_pos().y + pos_y,
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close_button_radius );
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dummy_circle.attr({'opacity':1, 'fill': 'transparent', 'stroke':'none', 'cursor':'pointer'});
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dummy_circle.transform(graph.get_transform());
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graph.set_scrolling(dummy_circle);
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this.get_pos = function(){
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return entity.get_pos().add_xy(pos_x,pos_y);
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};
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this.update_pos = function(){
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var pos = self.get_pos();
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close_circle.attr({'cx':pos.x, 'cy':pos.y});
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dummy_circle.attr({'cx':pos.x, 'cy':pos.y});
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close_label.attr({'x':pos.x, 'y':pos.y});
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};
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function hover_in(){
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if(!visible){ return; }
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close_circle.animate({'r': close_button_radius * 1.5}, 300, 'elastic');
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dummy_circle.animate({'r': close_button_radius * 1.5}, 300, 'elastic');
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}
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function hover_out(){
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if(!visible){ return; }
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close_circle.animate({'r': close_button_radius},400,'linear');
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dummy_circle.animate({'r': close_button_radius},400,'linear');
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}
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dummy_circle.hover(hover_in,hover_out);
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function click_action(){
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if(!visible){ return; }
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close_circle.attr({'r': close_button_radius * 2 });
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dummy_circle.attr({'r': close_button_radius * 2 });
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close_circle.animate({'r': close_button_radius }, 400, 'linear');
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dummy_circle.animate({'r': close_button_radius }, 400, 'linear');
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if(entity_type == "node"){
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$.when(GraphNode.destruction_callback(entity)).then(function () {
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//console.log("remove node",entity);
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entity.remove();
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});
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}else if(entity_type == "edge"){
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$.when(GraphEdge.destruction_callback(entity)).then(function () {
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//console.log("remove edge",entity);
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entity.remove();
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});
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}
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}
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dummy_circle.click(click_action);
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this.show = function(){
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if(!visible){
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close_circle.animate({'opacity':1}, 100, 'linear');
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close_label.animate({'opacity':1}, 100, 'linear');
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visible = true;
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}
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}
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this.hide = function(){
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if(visible){
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close_circle.animate({'opacity':0}, 100, 'linear');
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close_label.animate({'opacity':0}, 100, 'linear');
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visible = false;
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}
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}
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//destroy this object and remove it from the graph
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this.remove = function(){
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if(visible){
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visible = false;
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close_circle.animate({'opacity':0}, 100, 'linear');
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close_label.animate({'opacity':0}, 100, 'linear',self.remove);
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}else{
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close_circle.remove();
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close_label.remove();
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dummy_circle.remove();
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}
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}
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}
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// connectors are start and end point of edge creation drags.
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function Connector(graph,node,pos_x,pos_y){
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var visible = false;
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var conn_circle = graph.r.circle(node.get_pos().x + pos_x, node.get_pos().y + pos_y,4);
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conn_circle.attr({ 'opacity': 0,
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'fill': graph.style.node_outline_color,
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'stroke': 'none' });
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conn_circle.transform(graph.get_transform());
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graph.set_scrolling(conn_circle);
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var self = this;
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this.update_pos = function(){
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conn_circle.attr({'cx':node.get_pos().x + pos_x, 'cy':node.get_pos().y + pos_y});
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};
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this.get_pos = function(){
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return new node.get_pos().add_xy(pos_x,pos_y);
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};
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this.remove = function(){
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conn_circle.remove();
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}
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function hover_in(){
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if(!visible){ return;}
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conn_circle.animate({'r':8},300,'elastic');
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if(graph.creating_edge){
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graph.target_node = node;
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conn_circle.animate({ 'fill': graph.style.connector_active_color,
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'stroke': graph.style.node_outline_color,
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'stroke-width': graph.style.node_selected_width,
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},100,'linear');
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}
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}
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function hover_out(){
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if(!visible){ return;}
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conn_circle.animate({ 'r':graph.style.connector_radius,
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'fill':graph.style.node_outline_color,
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'stroke':'none'},400,'linear');
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graph.target_node = null;
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}
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conn_circle.hover(hover_in,hover_out);
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var drag_down = function(){
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if(!visible){ return; }
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self.ox = conn_circle.attr("cx");
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self.oy = conn_circle.attr("cy");
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self.edge_start = new EdgeEnd(self.ox,self.oy);
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self.edge_end = new EdgeEnd(self.ox, self.oy);
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self.edge_tmp = new GraphEdge(graph,'',self.edge_start,self.edge_end,true);
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graph.creating_edge = true;
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};
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var drag_move = function(dx,dy){
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if(!visible){ return; }
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self.edge_end.x = self.ox + dx;
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self.edge_end.y = self.oy + dy;
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self.edge_tmp.update();
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};
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var drag_up = function(){
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if(!visible){ return; }
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graph.creating_edge = false;
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self.edge_tmp.remove();
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if(graph.target_node){
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var edge_prop = GraphEdge.creation_callback(node,graph.target_node);
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if(edge_prop){
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var new_edge = new GraphEdge(graph,edge_prop.label, node,graph.target_node);
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GraphEdge.new_edge_callback(new_edge);
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}
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}
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};
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conn_circle.drag(drag_move,drag_down,drag_up);
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function show(){
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if(!visible){
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conn_circle.animate({'opacity':1}, 100, 'linear');
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visible = true;
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}
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}
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function hide(){
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if(visible){
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conn_circle.animate({'opacity':0}, 100, 'linear');
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visible = false;
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}
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}
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this.show = show;
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this.hide = hide;
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}
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//Creates a new graph on raphael document r.
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//style is a dictionary containing the style definitions
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//viewport (optional) is the dom element representing the viewport of the graph. It is used
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//to prevent scrolling to scroll the graph outside the viewport.
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function Graph(r,style,viewport){
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var self = this;
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var nodes = []; // list of all nodes in the graph
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var edges = []; // list of all edges in the graph
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var graph = {}; // graph[n1.uid][n2.uid] -> list of all edges from n1 to n2
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var links = {}; // links[n.uid] -> list of all edges from or to n
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var uid = 1; // all nodes and edges have an uid used to order their display when they are curved
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var selected_entity = null; //the selected entity (node or edge)
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self.creating_edge = false; // true if we are dragging a new edge onto a node
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self.target_node = null; // this holds the target node when creating an edge and hovering a connector
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self.r = r; // the raphael instance
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self.style = style; // definition of the colors, spacing, fonts, ... used by the elements
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var tr_x = 0, tr_y = 0; // global translation coordinate
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var background = r.rect(0,0,'100%','100%').attr({'fill':'white', 'stroke':'none', 'opacity':0, 'cursor':'move'});
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// return the global transform of the scene
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this.get_transform = function(){
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return "T"+tr_x+","+tr_y
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};
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// translate every element of the graph except the background.
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// elements inserted in the graph after a translate_all() must manually apply transformation
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// via get_transform()
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var translate_all = function(dx,dy){
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tr_x += dx;
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tr_y += dy;
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var tstr = self.get_transform();
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r.forEach(function(el){
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if(el != background){
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el.transform(tstr);
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}
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});
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};
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//returns {minx, miny, maxx, maxy}, the translated bounds containing all nodes
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var get_bounds = function(){
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var minx = Number.MAX_VALUE;
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var miny = Number.MAX_VALUE;
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var maxx = Number.MIN_VALUE;
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var maxy = Number.MIN_VALUE;
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for(var i = 0; i < nodes.length; i++){
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var pos = nodes[i].get_pos();
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minx = Math.min(minx,pos.x);
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miny = Math.min(miny,pos.y);
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maxx = Math.max(maxx,pos.x);
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maxy = Math.max(maxy,pos.y);
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}
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minx = minx - style.node_size_x / 2 + tr_x;
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miny = miny - style.node_size_y / 2 + tr_y;
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maxx = maxx + style.node_size_x / 2 + tr_x;
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maxy = maxy + style.node_size_y / 2 + tr_y;
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return { minx:minx, miny:miny, maxx:maxx, maxy:maxy };
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};
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// returns false if the translation dx,dy of the viewport
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// hides the graph (with optional margin)
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var translation_respects_viewport = function(dx,dy,margin){
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if(!viewport){
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return true;
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}
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margin = margin || 0;
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var b = get_bounds();
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var width = viewport.offsetWidth;
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var height = viewport.offsetHeight;
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if( ( dy < 0 && b.maxy + dy < margin ) ||
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( dy > 0 && b.miny + dy > height - margin ) ||
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( dx < 0 && b.maxx + dx < margin ) ||
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( dx > 0 && b.minx + dx > width - margin ) ){
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return false;
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}
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return true;
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}
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//Adds a mousewheel event callback to raph_element that scrolls the viewport
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this.set_scrolling = function(raph_element){
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$(raph_element.node).bind('mousewheel',function(event,delta){
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var dy = delta * 20;
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if( translation_respects_viewport(0,dy, style.viewport_margin) ){
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translate_all(0,dy);
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}
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});
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};
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var px, py;
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// Graph translation when background is dragged
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var bg_drag_down = function(){
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px = py = 0;
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};
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var bg_drag_move = function(x,y){
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var dx = x - px;
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var dy = y - py;
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px = x;
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py = y;
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if( translation_respects_viewport(dx,dy, style.viewport_margin) ){
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translate_all(dx,dy);
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}
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};
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var bg_drag_up = function(){};
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background.drag( bg_drag_move, bg_drag_down, bg_drag_up);
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this.set_scrolling(background);
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//adds a node to the graph and sets its uid.
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this.add_node = function (n){
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nodes.push(n);
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n.uid = uid++;
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};
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//return the list of all nodes in the graph
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this.get_node_list = function(){
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return nodes;
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};
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//adds an edge to the graph and sets its uid
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this.add_edge = function (n1,n2,e){
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edges.push(e);
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e.uid = uid++;
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if(!graph[n1.uid]) graph[n1.uid] = {};
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if(!graph[n1.uid][n2.uid]) graph[n1.uid][n2.uid] = [];
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if(!links[n1.uid]) links[n1.uid] = [];
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if(!links[n2.uid]) links[n2.uid] = [];
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graph[n1.uid][n2.uid].push(e);
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links[n1.uid].push(e);
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if(n1 != n2){
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links[n2.uid].push(e);
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}
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};
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//removes an edge from the graph
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this.remove_edge = function(edge){
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edges = _.without(edges,edge);
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var n1 = edge.get_start();
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var n2 = edge.get_end();
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links[n1.uid] = _.without(links[n1.uid],edge);
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links[n2.uid] = _.without(links[n2.uid],edge);
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graph[n1.uid][n2.uid] = _.without(graph[n1.uid][n2.uid],edge);
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if ( selected_entity == edge ){
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selected_entity = null;
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}
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};
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//removes a node and all connected edges from the graph
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this.remove_node = function(node){
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var linked_edges = self.get_linked_edge_list(node);
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for(var i = 0; i < linked_edges.length; i++){
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linked_edges[i].remove();
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}
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nodes = _.without(nodes,node);
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if ( selected_entity == node ){
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selected_entity = null;
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}
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}
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//return the list of edges from n1 to n2
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this.get_edge_list = function(n1,n2){
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var list = [];
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if(!graph[n1.uid]) return list;
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if(!graph[n1.uid][n2.uid]) return list;
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return graph[n1.uid][n2.uid];
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};
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//returns the list of all edge connected to n
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this.get_linked_edge_list = function(n){
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if(!links[n.uid]) return [];
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return links[n.uid];
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};
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//return a curvature index so that all edges connecting n1,n2 have different curvatures
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this.get_edge_curvature = function(n1,n2,e){
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var el_12 = this.get_edge_list(n1,n2);
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var c12 = el_12.length;
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var el_21 = this.get_edge_list(n2,n1);
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var c21 = el_21.length;
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if(c12 + c21 == 1){ // only one edge
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return 0;
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}else{
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var index = 0;
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for(var i = 0; i < c12; i++){
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if (el_12[i].uid < e.uid){
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index++;
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}
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}
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if(c21 == 0){ // all edges in the same direction
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return index - (c12-1)/2.0;
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}else{
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return index + 0.5;
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}
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}
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};
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// Returns the angle in degrees of the edge loop. We do not support more than 8 loops on one node
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this.get_loop_angle = function(n,e){
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var loop_list = this.get_edge_list(n,n);
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var slots = []; // the 8 angles where we can put the loops
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for(var angle = 0; angle < 360; angle += 45){
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slots.push(Vec2.new_polar_deg(1,angle));
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}
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//we assign to each slot a score. The higher the score, the closer it is to other edges.
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var links = this.get_linked_edge_list(n);
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for(var i = 0; i < links.length; i++){
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var edge = links[i];
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if(!edge.is_loop || edge.is_loop()){
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continue;
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}
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var end = edge.get_end();
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if (end == n){
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end = edge.get_start();
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}
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var dir = end.get_pos().sub(n.get_pos()).normalize();
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for(var s = 0; s < slots.length; s++){
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var score = slots[s].dot(dir);
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if(score < 0){
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score = -0.2*Math.pow(score,2);
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}else{
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score = Math.pow(score,2);
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}
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if(!slots[s].score){
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slots[s].score = score;
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}else{
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slots[s].score += score;
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}
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}
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}
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//we want the loops with lower uid to get the slots with the lower score
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slots.sort(function(a,b){ return a.score < b.score ? -1: 1; });
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var index = 0;
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for(var i = 0; i < links.length; i++){
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var edge = links[i];
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if(!edge.is_loop || !edge.is_loop()){
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continue;
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}
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if(edge.uid < e.uid){
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index++;
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}
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}
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index %= slots.length;
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return slots[index].angle_deg();
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}
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//selects a node or an edge and deselects everything else
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this.select = function(entity){
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if(selected_entity){
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if(selected_entity == entity){
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return;
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}else{
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if(selected_entity.set_not_selected){
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selected_entity.set_not_selected();
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}
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selected_entity = null;
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}
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}
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selected_entity = entity;
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if(entity && entity.set_selected){
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entity.set_selected();
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}
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};
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}
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// creates a new Graph Node on Raphael document r, centered on [pos_x,pos_y], with label 'label',
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// and of type 'circle' or 'rect', and of color 'color'
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function GraphNode(graph,pos_x, pos_y,label,type,color){
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var self = this;
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var r = graph.r;
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var sy = graph.style.node_size_y;
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var sx = graph.style.node_size_x;
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var node_fig = null;
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var selected = false;
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this.connectors = [];
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this.close_button = null;
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this.uid = 0;
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graph.add_node(this);
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if(type == 'circle'){
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node_fig = r.ellipse(pos_x,pos_y,sx/2,sy/2);
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}else{
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node_fig = r.rect(pos_x-sx/2,pos_y-sy/2,sx,sy);
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}
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node_fig.attr({ 'fill': color,
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'stroke': graph.style.node_outline_color,
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'stroke-width': graph.style.node_outline_width,
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'cursor':'pointer' });
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node_fig.transform(graph.get_transform());
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graph.set_scrolling(node_fig);
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var node_label = r.text(pos_x,pos_y,label);
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node_label.attr({ 'fill': graph.style.node_label_color,
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'font-size': graph.style.node_label_font_size,
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'cursor': 'pointer' });
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node_label.transform(graph.get_transform());
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graph.set_scrolling(node_label);
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// redraws all edges linked to this node
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var update_linked_edges = function(){
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var edges = graph.get_linked_edge_list(self);
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for(var i = 0; i < edges.length; i++){
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edges[i].update();
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}
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};
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// sets the center position of the node
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var set_pos = function(pos){
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if(type == 'circle'){
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node_fig.attr({'cx':pos.x,'cy':pos.y});
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}else{
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node_fig.attr({'x':pos.x-sx/2,'y':pos.y-sy/2});
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}
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node_label.attr({'x':pos.x,'y':pos.y});
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for(var i = 0; i < self.connectors.length; i++){
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self.connectors[i].update_pos();
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}
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if(self.close_button){
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self.close_button.update_pos();
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}
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update_linked_edges();
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};
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// returns the figure used to draw the node
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var get_fig = function(){
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return node_fig;
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};
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// returns the center coordinates
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var get_pos = function(){
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if(type == 'circle'){
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return new Vec2(node_fig.attr('cx'), node_fig.attr('cy'));
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}else{
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return new Vec2(node_fig.attr('x') + sx/2, node_fig.attr('y') + sy/2);
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}
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};
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// return the label string
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var get_label = function(){
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return node_label.attr("text");
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};
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// sets the label string
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var set_label = function(text){
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node_label.attr({'text':text});
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};
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var get_bound = function(){
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if(type == 'circle'){
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return new BEllipse(get_pos().x,get_pos().y,sx/2,sy/2);
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}else{
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return BRect.new_centered(get_pos().x,get_pos().y,sx,sy);
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}
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};
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// selects this node and deselects all other nodes
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var set_selected = function(){
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if(!selected){
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selected = true;
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node_fig.attr({ 'stroke': graph.style.node_selected_color,
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'stroke-width': graph.style.node_selected_width });
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if(!self.close_button){
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self.close_button = new CloseButton(graph,self, "node" ,sx/2 , - sy/2);
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self.close_button.show();
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}
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for(var i = 0; i < self.connectors.length; i++){
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self.connectors[i].show();
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|
}
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|
}
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|
};
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|
// deselect this node
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var set_not_selected = function(){
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|
if(selected){
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|
node_fig.animate({ 'stroke': graph.style.node_outline_color,
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'stroke-width': graph.style.node_outline_width },
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100,'linear');
|
|
if(self.close_button){
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|
self.close_button.remove();
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|
self.close_button = null;
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|
}
|
|
selected = false;
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|
}
|
|
for(var i = 0; i < self.connectors.length; i++){
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self.connectors[i].hide();
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|
}
|
|
};
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|
var remove = function(){
|
|
if(self.close_button){
|
|
self.close_button.remove();
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|
}
|
|
for(var i = 0; i < self.connectors.length; i++){
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|
self.connectors[i].remove();
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|
}
|
|
graph.remove_node(self);
|
|
node_fig.remove();
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|
node_label.remove();
|
|
}
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|
|
|
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this.set_pos = set_pos;
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this.get_pos = get_pos;
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|
this.set_label = set_label;
|
|
this.get_label = get_label;
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|
this.get_bound = get_bound;
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|
this.get_fig = get_fig;
|
|
this.set_selected = set_selected;
|
|
this.set_not_selected = set_not_selected;
|
|
this.update_linked_edges = update_linked_edges;
|
|
this.remove = remove;
|
|
|
|
|
|
//select the node and play an animation when clicked
|
|
var click_action = function(){
|
|
if(type == 'circle'){
|
|
node_fig.attr({'rx':sx/2 + 3, 'ry':sy/2+ 3});
|
|
node_fig.animate({'rx':sx/2, 'ry':sy/2},500,'elastic');
|
|
}else{
|
|
var cx = get_pos().x;
|
|
var cy = get_pos().y;
|
|
node_fig.attr({'x':cx - (sx/2) - 3, 'y':cy - (sy/2) - 3, 'ẃidth':sx+6, 'height':sy+6});
|
|
node_fig.animate({'x':cx - sx/2, 'y':cy - sy/2, 'ẃidth':sx, 'height':sy},500,'elastic');
|
|
}
|
|
graph.select(self);
|
|
};
|
|
node_fig.click(click_action);
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|
node_label.click(click_action);
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|
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|
//move the node when dragged
|
|
var drag_down = function(){
|
|
this.opos = get_pos();
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|
};
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|
var drag_move = function(dx,dy){
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|
// we disable labels when moving for performance reasons,
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|
// updating the label position is quite expensive
|
|
// we put this here because drag_down is also called on simple clicks ... and this causes unwanted flicker
|
|
var edges = graph.get_linked_edge_list(self);
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|
for(var i = 0; i < edges.length; i++){
|
|
edges[i].label_disable();
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|
}
|
|
if(self.close_button){
|
|
self.close_button.hide();
|
|
}
|
|
set_pos(this.opos.add_xy(dx,dy));
|
|
};
|
|
var drag_up = function(){
|
|
//we re-enable the
|
|
var edges = graph.get_linked_edge_list(self);
|
|
for(var i = 0; i < edges.length; i++){
|
|
edges[i].label_enable();
|
|
}
|
|
if(self.close_button){
|
|
self.close_button.show();
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|
}
|
|
};
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|
node_fig.drag(drag_move,drag_down,drag_up);
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|
node_label.drag(drag_move,drag_down,drag_up);
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|
|
|
//allow the user to create edges by dragging onto the node
|
|
function hover_in(){
|
|
if(graph.creating_edge){
|
|
graph.target_node = self;
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|
}
|
|
}
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|
function hover_out(){
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|
graph.target_node = null;
|
|
}
|
|
node_fig.hover(hover_in,hover_out);
|
|
node_label.hover(hover_in,hover_out);
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|
|
|
function double_click(){
|
|
GraphNode.double_click_callback(self);
|
|
}
|
|
node_fig.dblclick(double_click);
|
|
node_label.dblclick(double_click);
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|
|
|
this.connectors.push(new Connector(graph,this,-sx/2,0));
|
|
this.connectors.push(new Connector(graph,this,sx/2,0));
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|
this.connectors.push(new Connector(graph,this,0,-sy/2));
|
|
this.connectors.push(new Connector(graph,this,0,sy/2));
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|
|
|
this.close_button = new CloseButton(graph,this,"node",sx/2 , - sy/2 );
|
|
}
|
|
|
|
GraphNode.double_click_callback = function(node){
|
|
console.log("double click from node:",node);
|
|
};
|
|
|
|
// this is the default node destruction callback. It is called before the node is removed from the graph
|
|
// and before the connected edges are destroyed
|
|
GraphNode.destruction_callback = function(node){ return true; };
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|
|
|
// creates a new edge with label 'label' from start to end. start and end must implement get_pos_*,
|
|
// if tmp is true, the edge is not added to the graph, used for drag edges.
|
|
// replace tmp == false by graph == null
|
|
function GraphEdge(graph,label,start,end,tmp){
|
|
var self = this;
|
|
var r = graph.r;
|
|
var curvature = 0; // 0 = straight, != 0 curved
|
|
var s,e; // positions of the start and end point of the line between start and end
|
|
var mc; // position of the middle of the curve (bezier control point)
|
|
var mc1,mc2; // control points of the cubic bezier for the loop edges
|
|
var elfs = graph.style.edge_label_font_size || 10 ;
|
|
var label_enabled = true;
|
|
this.uid = 0; // unique id used to order the curved edges
|
|
var edge_path = ""; // svg definition of the edge vector path
|
|
var selected = false;
|
|
|
|
if(!tmp){
|
|
graph.add_edge(start,end,this);
|
|
}
|
|
|
|
//Return the position of the label
|
|
function get_label_pos(path){
|
|
var cpos = path.getTotalLength() * 0.5;
|
|
var cindex = Math.abs(Math.floor(curvature));
|
|
var mod = ((cindex % 3)) * (elfs * 3.1) - (elfs * 0.5);
|
|
var verticality = Math.abs(end.get_pos().sub(start.get_pos()).normalize().dot_xy(0,1));
|
|
verticality = Math.max(verticality-0.5,0)*2;
|
|
|
|
var lpos = path.getPointAtLength(cpos + mod * verticality);
|
|
return new Vec2(lpos.x,lpos.y - elfs *(1-verticality));
|
|
}
|
|
|
|
//used by close_button
|
|
this.get_pos = function(){
|
|
if(!edge){
|
|
return start.get_pos().lerp(end.get_pos(),0.5);
|
|
}
|
|
return get_label_pos(edge);
|
|
/*
|
|
var bbox = edge_label.getBBox(); Does not work... :(
|
|
return new Vec2(bbox.x + bbox.width, bbox.y);*/
|
|
}
|
|
|
|
//Straight line from s to e
|
|
function make_line(){
|
|
return "M" + s.x + "," + s.y + "L" + e.x + "," + e.y ;
|
|
}
|
|
//Curved line from s to e by mc
|
|
function make_curve(){
|
|
return "M" + s.x + "," + s.y + "Q" + mc.x + "," + mc.y + " " + e.x + "," + e.y;
|
|
}
|
|
//Curved line from s to e by mc1 mc2
|
|
function make_loop(){
|
|
return "M" + s.x + " " + s.y +
|
|
"C" + mc1.x + " " + mc1.y + " " + mc2.x + " " + mc2.y + " " + e.x + " " + e.y;
|
|
}
|
|
|
|
//computes new start and end line coordinates
|
|
function update_curve(){
|
|
if(start != end){
|
|
if(!tmp){
|
|
curvature = graph.get_edge_curvature(start,end,self);
|
|
}else{
|
|
curvature = 0;
|
|
}
|
|
s = start.get_pos();
|
|
e = end.get_pos();
|
|
|
|
mc = s.lerp(e,0.5); //middle of the line s->e
|
|
var se = e.sub(s);
|
|
se = se.normalize();
|
|
se = se.rotate_deg(-90);
|
|
se = se.scale(curvature * graph.style.edge_spacing);
|
|
mc = mc.add(se);
|
|
|
|
if(start.get_bound){
|
|
var col = start.get_bound().collide_segment(s,mc);
|
|
if(col.length > 0){
|
|
s = col[0];
|
|
}
|
|
}
|
|
if(end.get_bound){
|
|
var col = end.get_bound().collide_segment(mc,e);
|
|
if(col.length > 0){
|
|
e = col[0];
|
|
}
|
|
}
|
|
|
|
if(curvature != 0){
|
|
edge_path = make_curve();
|
|
}else{
|
|
edge_path = make_line();
|
|
}
|
|
}else{ // start == end
|
|
var rad = graph.style.edge_loop_radius || 100;
|
|
s = start.get_pos();
|
|
e = end.get_pos();
|
|
|
|
var r = Vec2.new_polar_deg(rad,graph.get_loop_angle(start,self));
|
|
mc = s.add(r);
|
|
var p = r.rotate_deg(90);
|
|
mc1 = mc.add(p.set_len(rad*0.5));
|
|
mc2 = mc.add(p.set_len(-rad*0.5));
|
|
|
|
if(start.get_bound){
|
|
var col = start.get_bound().collide_segment(s,mc1);
|
|
if(col.length > 0){
|
|
s = col[0];
|
|
}
|
|
var col = start.get_bound().collide_segment(e,mc2);
|
|
if(col.length > 0){
|
|
e = col[0];
|
|
}
|
|
}
|
|
edge_path = make_loop();
|
|
}
|
|
}
|
|
|
|
update_curve();
|
|
var edge = r.path(edge_path).attr({ 'stroke': graph.style.edge_color,
|
|
'stroke-width': graph.style.edge_width,
|
|
'arrow-end': 'block-wide-long',
|
|
'cursor':'pointer' }).insertBefore(graph.get_node_list()[0].get_fig());
|
|
var labelpos = get_label_pos(edge);
|
|
var edge_label = r.text(labelpos.x, labelpos.y - elfs, label).attr({
|
|
'fill': graph.style.edge_label_color,
|
|
'cursor': 'pointer',
|
|
'font-size': elfs });
|
|
|
|
edge.transform(graph.get_transform());
|
|
graph.set_scrolling(edge);
|
|
|
|
edge_label.transform(graph.get_transform());
|
|
graph.set_scrolling(edge_label);
|
|
|
|
|
|
//since we create an edge we need to recompute the edges that have the same start and end positions as this one
|
|
if(!tmp){
|
|
var edges_start = graph.get_linked_edge_list(start);
|
|
var edges_end = graph.get_linked_edge_list(end);
|
|
var edges = edges_start.length < edges_end.length ? edges_start : edges_end;
|
|
for(var i = 0; i < edges.length; i ++){
|
|
if(edges[i] != self){
|
|
edges[i].update();
|
|
}
|
|
}
|
|
}
|
|
function label_enable(){
|
|
if(!label_enabled){
|
|
label_enabled = true;
|
|
edge_label.animate({'opacity':1},100,'linear');
|
|
if(self.close_button){
|
|
self.close_button.show();
|
|
}
|
|
self.update();
|
|
}
|
|
}
|
|
function label_disable(){
|
|
if(label_enabled){
|
|
label_enabled = false;
|
|
edge_label.animate({'opacity':0},100,'linear');
|
|
if(self.close_button){
|
|
self.close_button.hide();
|
|
}
|
|
}
|
|
}
|
|
//update the positions
|
|
function update(){
|
|
update_curve();
|
|
edge.attr({'path':edge_path});
|
|
if(label_enabled){
|
|
var labelpos = get_label_pos(edge);
|
|
edge_label.attr({'x':labelpos.x, 'y':labelpos.y - 14});
|
|
}
|
|
}
|
|
// removes the edge from the scene, disconnects it from linked
|
|
// nodes, destroy its drawable elements.
|
|
function remove(){
|
|
edge.remove();
|
|
edge_label.remove();
|
|
if(!tmp){
|
|
graph.remove_edge(self);
|
|
}
|
|
if(start.update_linked_edges){
|
|
start.update_linked_edges();
|
|
}
|
|
if(start != end && end.update_linked_edges){
|
|
end.update_linked_edges();
|
|
}
|
|
if(self.close_button){
|
|
self.close_button.remove();
|
|
}
|
|
}
|
|
|
|
this.set_selected = function(){
|
|
if(!selected){
|
|
selected = true;
|
|
edge.attr({ 'stroke': graph.style.node_selected_color,
|
|
'stroke-width': graph.style.node_selected_width });
|
|
edge_label.attr({ 'fill': graph.style.node_selected_color });
|
|
if(!self.close_button){
|
|
self.close_button = new CloseButton(graph,self,"edge",0,30);
|
|
self.close_button.show();
|
|
}
|
|
}
|
|
};
|
|
|
|
this.set_not_selected = function(){
|
|
if(selected){
|
|
selected = false;
|
|
edge.animate({ 'stroke': graph.style.edge_color,
|
|
'stroke-width': graph.style.edge_width }, 100,'linear');
|
|
edge_label.animate({ 'fill': graph.style.edge_label_color}, 100, 'linear');
|
|
if(self.close_button){
|
|
self.close_button.remove();
|
|
self.close_button = null;
|
|
}
|
|
}
|
|
};
|
|
function click_action(){
|
|
graph.select(self);
|
|
}
|
|
edge.click(click_action);
|
|
edge_label.click(click_action);
|
|
|
|
function double_click_action(){
|
|
GraphEdge.double_click_callback(self);
|
|
}
|
|
|
|
edge.dblclick(double_click_action);
|
|
edge_label.dblclick(double_click_action);
|
|
|
|
|
|
this.label_enable = label_enable;
|
|
this.label_disable = label_disable;
|
|
this.update = update;
|
|
this.remove = remove;
|
|
this.is_loop = function(){ return start == end; };
|
|
this.get_start = function(){ return start; };
|
|
this.get_end = function(){ return end; };
|
|
}
|
|
|
|
GraphEdge.double_click_callback = function(edge){
|
|
console.log("double click from edge:",edge);
|
|
};
|
|
|
|
// this is the default edge creation callback. It is called before an edge is created
|
|
// It returns an object containing the properties of the edge.
|
|
// If it returns null, the edge is not created.
|
|
GraphEdge.creation_callback = function(start,end){
|
|
var edge_prop = {};
|
|
edge_prop.label = 'new edge!';
|
|
return edge_prop;
|
|
};
|
|
// This is is called after a new edge is created, with the new edge
|
|
// as parameter
|
|
GraphEdge.new_edge_callback = function(new_edge){};
|
|
|
|
// this is the default edge destruction callback. It is called before
|
|
// an edge is removed from the graph.
|
|
GraphEdge.destruction_callback = function(edge){ return true; };
|
|
|
|
|
|
|
|
// returns a new string with the same content as str, but with lines of maximum 'width' characters.
|
|
// lines are broken on words, or into words if a word is longer than 'width'
|
|
function wordwrap( str, width) {
|
|
// http://james.padolsey.com/javascript/wordwrap-for-javascript/
|
|
width = width || 32;
|
|
var cut = true;
|
|
var brk = '\n';
|
|
if (!str) { return str; }
|
|
var regex = '.{1,' +width+ '}(\\s|$)' + (cut ? '|.{' +width+ '}|.+$' : '|\\S+?(\\s|$)');
|
|
return str.match(new RegExp(regex, 'g') ).join( brk );
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}
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|
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window.CuteGraph = Graph;
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|
window.CuteNode = GraphNode;
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|
window.CuteEdge = GraphEdge;
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|
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|
window.CuteGraph.wordwrap = wordwrap;
|
|
|
|
|
|
})(window);
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|
|