From f81202d509bebf98a986113c1b7a087cd32c43d8 Mon Sep 17 00:00:00 2001
From: Daniel Jones <admin@danieljon.es>
Date: Wed, 24 Jun 2020 13:00:30 +0930
Subject: logic: now recursively updates gates when a change is made by keeping
 track of all connected gates

---
 Gate.cpp       | 16 +++++++++++++++-
 Gate.h         |  5 +++++
 MainWindow.cpp | 31 ++++++++++++++++++++++++++++---
 MainWindow.h   |  1 +
 4 files changed, 49 insertions(+), 4 deletions(-)

diff --git a/Gate.cpp b/Gate.cpp
index 9ffa50d..a0ac6ea 100644
--- a/Gate.cpp
+++ b/Gate.cpp
@@ -32,6 +32,20 @@ Gate::Gate(GATE_TYPE type, int x, int y, int width, int height)
 
 Gate::~Gate() {}
 
+void
+Gate::remove_output_gate_id(int id)
+{
+	int pos = 0;
+	for(auto g = output_gate_ids.begin(); g != output_gate_ids.end(); ++g)
+	{
+		if (id == (*g))
+		{
+			output_gate_ids.erase(output_gate_ids.begin() + pos);
+		}
+		pos++;
+	}
+}
+
 void Gate::update_state()
 {
 	switch (this->gate_type)
@@ -116,6 +130,7 @@ void Gate::update_state()
 			break;
 	}
 }
+
 std::string
 Gate::get_output_type_text()
 {
@@ -176,7 +191,6 @@ Gate::get_output_type_text()
 		default:
 		return "?";
 	}
-
 }
 
 
diff --git a/Gate.h b/Gate.h
index 655c473..68afab0 100644
--- a/Gate.h
+++ b/Gate.h
@@ -17,6 +17,7 @@
 #define GATE_H
 
 #include <string>
+#include <vector>
 
 class Gate
 {
@@ -44,6 +45,7 @@ class Gate
 		int get_width() { return this->w; };
 		int get_height() { return this->h; };
 		bool get_output_state() { return this->output_state; };
+		std::vector<int> *get_output_gates() { return &this->output_gate_ids; };
 		GATE_TYPE get_gate_type() { return this->gate_type; };
 		Gate *get_input_gate1() { return this->input_gate1; };
 		Gate *get_input_gate2() { return this->input_gate2; };
@@ -55,6 +57,8 @@ class Gate
 		void set_input_gate1(Gate *gate) { this->input_gate1 = gate; };
 		void set_input_gate2(Gate *gate) { this->input_gate2 = gate; };
 		//void set_output_gate(Gate *gate) { this->output_gate = gate; };
+		void add_output_gate_id(int id) { this->output_gate_ids.push_back(id); };
+		void remove_output_gate_id(int id);
 		void update_state();
 
 	private:
@@ -70,6 +74,7 @@ class Gate
 		Gate *input_gate1;
 		Gate *input_gate2;
 		//Gate *output_gate;
+		std::vector<int> output_gate_ids;
 
 		/* states */
 		bool output_state = false;
diff --git a/MainWindow.cpp b/MainWindow.cpp
index 91fd4a4..3a5f359 100644
--- a/MainWindow.cpp
+++ b/MainWindow.cpp
@@ -146,11 +146,13 @@ MainWindow::draw()
 	Gate *gate1;
 
 	/* update every gate */
+	/*
 	for(auto g1 = gates.begin(); g1 != gates.end(); ++g1)
 	{
 		gate1 = (*g1).get();
 		gate1->update_state();
 	}
+	*/
 
 	/* draw gates */
 	for(auto g1 = gates.begin(); g1 != gates.end(); ++g1)
@@ -357,6 +359,24 @@ Gate
 	return gate;
 }
 
+void
+MainWindow::update_gate_state(Gate *gate)
+{
+	gate->update_state();
+	/* update all gates that are using this gate as an input */
+	Gate *gate2;
+	printf("out gate size: %ld\n", gate->get_output_gates()->size());
+	for(auto g = gate->get_output_gates()->begin(); g != gate->get_output_gates()->end(); ++g)
+	{
+		 gate2 = find_gate_by_id((*g));
+		 if (gate2)
+		 {
+			 printf("updating gate %p from gate %p\n", gate2, gate);
+			 update_gate_state(gate2);
+		 }
+	}
+
+}
 
 long
 MainWindow::on_paint(FXObject*, FXSelector, void *ptr)
@@ -391,7 +411,8 @@ MainWindow::on_left_mouse_down(FXObject*, FXSelector, void *ptr)
 			{
 				dragging_link = true;
 			}
-			gate->update_state();
+			//gate->update_state();
+			update_gate_state(gate);
 		}
 		else
 		{
@@ -444,7 +465,10 @@ MainWindow::on_left_mouse_up(FXObject*, FXSelector, void *ptr)
 				}
 			}
 			//selected_gate->set_output_gate(gate);
-			gate->update_state();
+			selected_gate->add_output_gate_id(gate->get_id());
+			printf("adding output gate");
+			//gate->update_state();
+			update_gate_state(gate);
 		}
 		dragging_link = false;
 	}
@@ -465,7 +489,8 @@ MainWindow::on_right_mouse_down(FXObject*, FXSelector, void *ptr)
 			gate->set_state(!gate->get_output_state());
 		}
 	}
-		gate->update_state();
+		//gate->update_state();
+		update_gate_state(gate);
 	draw();
 
 	return 1;
diff --git a/MainWindow.h b/MainWindow.h
index d150325..ac3ff2e 100644
--- a/MainWindow.h
+++ b/MainWindow.h
@@ -83,6 +83,7 @@ class MainWindow : public FXMainWindow
 	private:
 		void create_ui();
 		void draw();
+		void update_gate_state(Gate *gate);
 		Gate *find_gate_at(int x, int y);
 		Gate *find_gate_by_id(int id);
 
-- 
cgit v1.2.3