From 4a35f4247fb2fa7746e3040f6efb1faff3c21174 Mon Sep 17 00:00:00 2001
From: Nikita Zlobin <nick87720z@gmail.com>
Date: Sun, 15 May 2011 17:49:13 +0600
Subject: [PATCH] Begining of wire implementation

---
 src/gtkgraph-demo.c | 89 +++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 76 insertions(+), 13 deletions(-)

diff --git a/src/gtkgraph-demo.c b/src/gtkgraph-demo.c
index e9eb97d..27c22d2 100644
--- a/src/gtkgraph-demo.c
+++ b/src/gtkgraph-demo.c
@@ -17,11 +17,14 @@
  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define _GNU_SOURCE
+
 #include <goocanvas.h>
 #include <math.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdio.h>
 
 static gboolean on_root_buttonPress_event   (GooCanvasItem * item, GooCanvasItem * target, GdkEventButton * event, gpointer data);
 static gboolean on_root_buttonRelease_event (GooCanvasItem * item, GooCanvasItem * target, GdkEventButton * event, gpointer data);
@@ -43,7 +46,6 @@ static gboolean on_port_text_notify   (GooCanvasItem * item, GParamSpec * event,
 static gboolean wire_entered (GooCanvasItem * item, GooCanvasItem * target, GdkEventCrossing * event, gpointer data);
 static gboolean wire_left    (GooCanvasItem * item, GooCanvasItem * target, GdkEventCrossing * event, gpointer data);
 
-GooCanvasItem * wire;
 double border_threshold = 1.0;
 
 #define drag_button 1
@@ -121,6 +123,23 @@ struct {
 
 #define G_MODULAR_GRAPH_PORT(p) ((GModularGraph_Port *) (p))
 
+typedef
+struct {
+    GooCanvasItem * path_b;
+    GooCanvasItem * path_t;
+
+    //char ** cmd_v;
+    //unsigned * cmd_len;
+    
+    double x1, y1, cx1, cy1;
+    double x2, y2, cx2, cy2;
+
+    double angle1, angle2; /* In degreens */
+    unsigned color;
+} GModularGraph_Wire;
+
+#define G_MODULAR_GRAPH_WIRE(p) ((GModularGraph_Wire *) (p))
+
 /* Canvas data */
 GtkWidget * canvas;
 GooCanvasItem * root_item;
@@ -336,6 +355,58 @@ void g_modular_graph_module_add_port (GModularGraph_Port ** ret,
   if (ret) *ret = port;
 }
 
+typedef
+union {
+    struct {
+      uint8_t alpha;
+      uint8_t blue;
+      uint8_t green;
+      uint8_t red;
+    };
+    uint32_t value;
+} Color;
+
+GModularGraph_Wire * g_modular_graph_wire_new (double x1, double y1, double angle1, double x2, double y2, double angle2, char * tooltip, unsigned color)
+{
+  char * wire_data;
+  GModularGraph_Wire * wire;
+  wire = calloc (1, sizeof (GModularGraph_Wire));
+  wire->x1 = x1, wire->y1 = y1;
+  wire->x2 = x2, wire->y2 = y2;
+  wire->angle1 = angle1;
+  wire->angle2 = angle2;
+
+  wire->cx1 = wire->x1 + cos (wire->angle1 * G_PI / 180) * 50;
+  wire->cy1 = wire->y1 + sin (wire->angle1 * G_PI / 180) * 50;
+  wire->cx2 = wire->x2 + cos (wire->angle2 * G_PI / 180) * 50;
+  wire->cy2 = wire->y2 + sin (wire->angle2 * G_PI / 180) * 50;
+  asprintf (& wire_data, "M%i,%i C%i,%i %i,%i %i,%i",
+            (int) wire->x1, (int) wire->y1,
+            (int) wire->cx1, (int) wire->cy1,
+            (int) wire->cx2, (int) wire->cy2,
+            (int) wire->x2, (int) wire->y2);
+
+  wire->path_b = goo_canvas_path_new (root_item,
+                                      wire_data,
+                                      "line-width", 2.0,
+                                      "stroke-color-rgba", color, NULL);
+
+  Color color_t = {.value = 0xff0000f0};
+  color_t.red   = color_t.red + (0xff - color_t.red) * 0.8;
+  color_t.green = color_t.green + (0xff - color_t.green) * 0.8;
+  color_t.blue  = color_t.blue + (0xff - color_t.blue) * 0.8;
+  wire->path_t = goo_canvas_path_new (root_item,
+                                      wire_data,
+                                      "line-width", 1.0,
+                                      "stroke-color-rgba", color_t.value, NULL);
+
+  g_signal_connect (G_OBJECT (wire->path_t), "enter-notify-event", G_CALLBACK (wire_entered), NULL);
+  g_signal_connect (G_OBJECT (wire->path_t), "leave-notify-event", G_CALLBACK (wire_left),    NULL);
+  g_object_set (wire->path_t, "tooltip", tooltip, NULL);
+
+  return wire;
+}
+
 int main( int argc, char ** argv )
 {
   GtkWidget * win;
@@ -377,20 +448,12 @@ int main( int argc, char ** argv )
   g_modular_graph_module_add_port (NULL, module[1], G_MODULAR_GRAPH_PORT_DIRECTION_OUT, "out-2", "Out 2 tip");
 
   /* 2. Connection */
-  char * wire_data = "M50,100 C100,100 50,200 100,200";
-  wire = goo_canvas_path_new (root_item,
-                              wire_data,
-                              "line-width", 3.0,
-                              "stroke-color", "black", NULL);
-  wire = goo_canvas_path_new (root_item,
-                              wire_data,
-                              "line-width", 2.0,
-                              "stroke-color", "violet", NULL);
-  g_signal_connect (G_OBJECT (wire), "enter-notify-event", G_CALLBACK (wire_entered), NULL);
-  g_signal_connect (G_OBJECT (wire), "leave-notify-event", G_CALLBACK (wire_left),    NULL);
+  g_modular_graph_wire_new (50, 100, 0.0, 300, 300, 180, "Test wire", 0x5f0000ff);
+  g_modular_graph_wire_new (50, 300, 0.0, 300, 100, 180, "Test wire", 0x5f0000ff);
+
+  /* * * * */
 
   gtk_widget_set_has_tooltip (canvas, TRUE);
-  g_object_set (wire, "tooltip", "Wire Test", NULL);
 
   gtk_widget_show_all (win);
   gtk_main ();
-- 
2.11.4.GIT