From 91aff1783d364f3f2c814a90ec292cb89d5deb88 Mon Sep 17 00:00:00 2001
From: Daniel Jones <admin@danieljon.es>
Date: Wed, 24 Jun 2020 21:24:22 +0930
Subject: functionality: implemented deleting selected gate with the delete
 key.

---
 Gate.cpp       | 17 ++++++++++++++++-
 Gate.h         |  1 +
 MainWindow.cpp | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 69 insertions(+), 1 deletion(-)

diff --git a/Gate.cpp b/Gate.cpp
index 70e55fe..89a5daa 100644
--- a/Gate.cpp
+++ b/Gate.cpp
@@ -40,7 +40,6 @@ Gate::remove_output_gate_id(int id)
 	{
 		if (id == (*g))
 		{
-			printf("%id = %d\n", id, *g);
 			output_gate_ids.erase(output_gate_ids.begin() + pos);
 			break;
 		}
@@ -48,6 +47,22 @@ Gate::remove_output_gate_id(int id)
 	}
 }
 
+void
+Gate::remove_input_gate(int id)
+{
+	if (input_gate1)
+	{
+		if (input_gate1->get_id() == id)
+			input_gate1 = nullptr;
+	}
+
+	if (input_gate2)
+	{
+		if (input_gate2->get_id() == id)
+			input_gate2 = nullptr;
+	}
+}
+
 void Gate::update_state()
 {
 	switch (this->gate_type)
diff --git a/Gate.h b/Gate.h
index 68afab0..ad2f212 100644
--- a/Gate.h
+++ b/Gate.h
@@ -59,6 +59,7 @@ class 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 remove_input_gate(int id);
 		void update_state();
 
 	private:
diff --git a/MainWindow.cpp b/MainWindow.cpp
index 23ca61c..8b22243 100644
--- a/MainWindow.cpp
+++ b/MainWindow.cpp
@@ -604,6 +604,7 @@ MainWindow::on_key_release(FXObject *sender, FXSelector sel, void *ptr)
 		{
 			if (selected_input.gate != nullptr)
 			{
+				/* delete link */
 				switch (selected_input.input)
 				{
 					case 1:
@@ -622,8 +623,59 @@ MainWindow::on_key_release(FXObject *sender, FXSelector sel, void *ptr)
 				selected_input.input = -1;
 				draw();
 			}
+			else if (selected_gate)
+			{
+				/* delete gate and all associations */
+				/*
+				 * 2 inputs
+				 * x outputs
+				 *
+				 * inputs:
+				 * 	if input1/2 != null:
+				 * 		call their remove_gate_id with this gate id
+				 * 		update that gate
+				 * outputs:
+				 * 	iterate through ouputs
+				 *	call remove_input_gate with this gate id
+				 *	update that gate
+				 */
+				Gate *gate;
+				/* delete inputs */
+				if (selected_gate->get_input_gate1())
+				{
+					selected_gate->get_input_gate1()->remove_output_gate_id(selected_gate->get_id());
+					update_gate_state(selected_gate->get_input_gate1());
+				}
+				if (selected_gate->get_input_gate2())
+				{
+					selected_gate->get_input_gate2()->remove_output_gate_id(selected_gate->get_id());
+					update_gate_state(selected_gate->get_input_gate2());
+				}
+
+				/* delete outputs */
+				for(auto g = selected_gate->get_output_gates()->begin(); g != selected_gate->get_output_gates()->end(); ++g)
+				{
+					gate = find_gate_by_id((*g));
+					if (!gate)
+						continue;
+					gate->remove_input_gate(selected_gate->get_id());
+					update_gate_state(gate);
+				}
+				int pos = 0;
+				for (auto g = gates.begin(); g != gates.end(); ++g)
+				{
+					gate = (*g).get();
+					if (gate->get_id() == selected_gate->get_id())
+					{
+						gates.erase(gates.begin() + pos);
+						break;
+					}
+					pos++;
+				}
+			}
 			break;
 		}
+
 		default:
 			this->onKeyPress(sender, sel, ptr);
 			break;
-- 
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