From b65afde1420fcc10a623a1180c712c65fc86bcf5 Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Sat, 15 Jun 2019 14:17:06 +0200
Subject: [PATCH] MatrixEffect now uses dynamically allocated memory.

---
 include/effect_matrix.h |  4 +++-
 src/effect_matrix.cpp   | 12 ++++++++++--
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/include/effect_matrix.h b/include/effect_matrix.h
index 6ac7a59..7e00a8e 100644
--- a/include/effect_matrix.h
+++ b/include/effect_matrix.h
@@ -30,9 +30,11 @@ public:
 
 class MatrixEffect : public Effect {
 private:
-    MatrixEffectColumn columns[LED_WIDTH];
+    MatrixEffectColumn* _columns;
 public:
     boolean can_be_shown_with_clock();
+    void start();
+    void stop();
     MatrixEffect();
     void loop();
 };
diff --git a/src/effect_matrix.cpp b/src/effect_matrix.cpp
index d79023a..b977654 100644
--- a/src/effect_matrix.cpp
+++ b/src/effect_matrix.cpp
@@ -55,10 +55,18 @@ void MatrixEffectColumn::loop() {
 boolean MatrixEffect::can_be_shown_with_clock() { return true; };
 
 MatrixEffect::MatrixEffect() {
-    for (int i=0; i<LED_WIDTH; i++) columns[i] = MatrixEffectColumn(window, i);
+}
+
+void MatrixEffect::start() {
+	_columns = new MatrixEffectColumn[LED_WIDTH];
+	for (int i=0; i<LED_WIDTH; i++) _columns[i] = MatrixEffectColumn(window, i);
+}
+
+void MatrixEffect::stop() {
+	delete[] _columns;
 }
 
 void MatrixEffect::loop() {
     window->clear();
-    for (int i=0; i<window->width; i++) columns[i].loop();
+    for (int i=0; i<window->width; i++) _columns[i].loop();
 }