Changeset 1440:3d2e3cfb2a6c in lemon-0.x for gui/graph_displayer_canvas.cc

Timestamp:

05/27/05 12:34:20 (19 years ago)

Author:

Hegyi Péter

Branch:

default

Phase:

public

Convert:

svn:c9d7d8f5-90d6-0310-b91f-818b3a526b0e/lemon/trunk@1915

Message:

Small documentation is added to GUI

File:

• gui/graph_displayer_canvas.cc (modified) (14 diffs)

gui/graph_displayer_canvas.cc

@@ -1 +1 @@
 #include <graph_displayer_canvas.h>
+#include <math.h>
 
 GraphDisplayerCanvas::GraphDisplayerCanvas(Graph & gr, CoordinatesMap & cm, MapStorage & ms):g(gr),nodesmap(g),edgesmap(g),edgetextmap(g),displayed_graph(*(root()), 0, 0),mapstorage(ms),isbutton(false),active_item(NULL)
 {
 
+  //first edges are drawn, to hide joining with nodes later
+
   for (EdgeIt i(g); i!=INVALID; ++i)
   {
+
+    //drawing green lines, coordinates are from cm
+
     Gnome::Canvas::Points coos;
     coos.push_back(Gnome::Art::Point(cm[g.source(i)].x,cm[g.source(i)].y));
@@ -12 +18 @@
     edgesmap[i]=new Gnome::Canvas::Line(displayed_graph, coos);
     *(edgesmap[i]) << Gnome::Canvas::Properties::fill_color("green");
-    edgesmap[i]->property_width_pixels().set_value(10);
+    edgesmap[i]->property_width_pixels().set_value(10);    
     
-    
+    //initializing edge-text as well, to empty string
+
     double x1, x2, y1, y2;
     edgesmap[i]->get_bounds(x1, y1, x2, y2);
@@ -22 +29 @@
   }
 
+  //afterwards nodes come to be drawn
+
   NodeIt i(g);
   int maxx=0, maxy=0, minx=(int)cm[i].x, miny=(int)cm[i].y;
@@ -27 +36 @@
   for (; i!=INVALID; ++i)
   {
+    //minimum and maximum is gathered to be able to zoom to the graph correctly (whole figure should be seen)
+
     if(cm[i].x>maxx)maxx=(int)cm[i].x;
     if(cm[i].y>maxy)maxy=(int)cm[i].y;
@@ -32 +43 @@
     if(cm[i].y<miny)miny=(int)cm[i].y;
 
+    //drawing bule nodes, with black line around them
+
     nodesmap[i]=new Gnome::Canvas::Ellipse(displayed_graph, cm[i].x-20, cm[i].y-20, cm[i].x+20, cm[i].y+20);
     *(nodesmap[i]) << Gnome::Canvas::Properties::fill_color("blue");
@@ -38 +51 @@
   }
 
+  //setting zoom to be able to see the whole graph on the canvas
+
   double biggest_x=(abs(maxx)>abs(minx))?(abs(maxx)+80):(abs(minx)+80);
   double biggest_y=(abs(maxy)>abs(miny))?(abs(maxy)+80):(abs(miny)+80);
@@ -50 +65 @@
 GraphDisplayerCanvas::~GraphDisplayerCanvas()
 {
-    Graph::NodeMap <int> id(g);
-    Graph::NodeMap <double> xc(g);
-    Graph::NodeMap <double> yc(g);
-
-    int j=1;
-
-    for (NodeIt i(g); i!=INVALID; ++i)
-    {
-        double x1,y1,x2,y2;
-        nodesmap[i]->get_bounds(x1, y1, x2, y2);
-
-        id[i]=j++;
-        xc[i]=(x1+x2)/2;
-        yc[i]=(y1+y2)/2;
-    }
-
-    GraphWriter<Graph> writer(std::cout,g);
-
-    writer.writeNodeMap("id", id);
-    writer.writeNodeMap("coordinates_x", xc);
-    writer.writeNodeMap("coordinates_y", yc);
-    writer.run();
+
+  //writing out the end state of the graph
+  //\todo all the maps has to be write out!
+
+  Graph::NodeMap <int> id(g);
+  Graph::NodeMap <double> xc(g);
+  Graph::NodeMap <double> yc(g);
+  
+  int j=1;
+  
+  for (NodeIt i(g); i!=INVALID; ++i)
+  {
+    double x1,y1,x2,y2;
+    nodesmap[i]->get_bounds(x1, y1, x2, y2);
+    
+    id[i]=j++;
+    xc[i]=(x1+x2)/2;
+    yc[i]=(y1+y2)/2;
+  }
+
+  GraphWriter<Graph> writer(std::cout,g);
+  
+  writer.writeNodeMap("id", id);
+  writer.writeNodeMap("coordinates_x", xc);
+  writer.writeNodeMap("coordinates_y", yc);
+  writer.run();
 }
 
@@ -86 +105 @@
 int GraphDisplayerCanvas::changeColor (std::string mapname)
 {  
+
+  //function maps the range of the maximum and
+  //the minimum of the nodemap to the range of
+  //green in RGB
+
   for (EdgeIt i(g); i!=INVALID; ++i)
   {
@@ -110 +134 @@
 int GraphDisplayerCanvas::changeText (std::string mapname)
 {
+
+  //the number in the map will be written on the edge
+  //EXCEPT when the name of the map is Text, because
+  //in that case empty string will be written, because
+  //that is the deleter map
+  //\todo isn't it a bit woodcutter?
+
   for (EdgeIt i(g); i!=INVALID; ++i)
   {
@@ -146 +177 @@
 int GraphDisplayerCanvas::rezoom ()
 {
+
+  //searches for the minimum and the maximum
+  //value of the coordinates of the nodes to
+  //set the pixel rpo unit to a value to be 
+  //able to see the whole graph in the canvas
+  //\todo does not work properly
+
   double x1, x2, y1, y2;
   int x,y;
@@ -178 +216 @@
 
 
-///This function moves only one node of displayed_graph,
-///but recalculate the location of weight point,
-///and also redraw the sides of the planefigure.
 bool GraphDisplayerCanvas::event_handler(GdkEvent* e, Node n)
 {
@@ -186 +221 @@
   {
     case GDK_BUTTON_PRESS:
+      //we mark the location of the event to be able to calculate parameters of dragging
       clicked_x=e->button.x;
       clicked_y=e->button.y;
@@ -196 +232 @@
       break;
     case GDK_MOTION_NOTIFY:
+      //we only have to do sg. if the mouse button is pressed
       if(isbutton)
       {
+        //new coordinates will be the old values,
+        //because the item will be moved to the
+        //new coordinate therefore the new movement
+        //has to be calculated from here
+
         double dx=e->motion.x-clicked_x;
         double dy=e->motion.y-clicked_y;
@@ -204 +246 @@
         clicked_y=e->motion.y;
 
+        //all the edges connected to the moved point has to be redrawn
+
         EdgeIt e;
-
         g.firstOut(e,n);
         for(;e!=INVALID;g.nextOut(e))