From db066968d2eda57a3aea3cf44f3718a6bda0c371 Mon Sep 17 00:00:00 2001
From: 0xFEEDC0DE64 <daniel@brunner.ninja>
Date: Tue, 2 Nov 2021 16:11:37 +0100
Subject: [PATCH] Added graphs

---
 CMakeLists.txt            |  4 ++
 src/graphdisplay.cpp      |  0
 src/graphdisplay.h        | 72 +++++++++++++++++++++++++++++++++
 src/splitgraphdisplay.cpp |  0
 src/splitgraphdisplay.h   | 83 +++++++++++++++++++++++++++++++++++++++
 src/widgets/graph.h       |  1 +
 6 files changed, 160 insertions(+)
 create mode 100644 src/graphdisplay.cpp
 create mode 100644 src/graphdisplay.h
 create mode 100644 src/splitgraphdisplay.cpp
 create mode 100644 src/splitgraphdisplay.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1c9177c..ebdb301 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,12 +10,14 @@ set(headers
     src/display.h
     src/displaywithtitle.h
     src/fontinterface.h
+    src/graphdisplay.h
     src/icon.h
     src/iconinterface.h
     src/menudisplay.h
     src/menuitem.h
     src/richtextrenderer.h
     src/screenmanager.h
+    src/splitgraphdisplay.h
     src/tftinstance.h
     src/textinterface.h
     src/actions/backproxyaction.h
@@ -41,8 +43,10 @@ set(sources
     src/changevaluedisplay_sntp_sync_mode_t.cpp
     src/display.cpp
     src/displaywithtitle.cpp
+    src/graphdisplay.cpp
     src/menudisplay.cpp
     src/screenmanager.cpp
+    src/splitgraphdisplay.cpp
     src/richtextrenderer.cpp
     src/tftinstance.cpp
     src/icons/back.cpp
diff --git a/src/graphdisplay.cpp b/src/graphdisplay.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/src/graphdisplay.h b/src/graphdisplay.h
new file mode 100644
index 0000000..c605688
--- /dev/null
+++ b/src/graphdisplay.h
@@ -0,0 +1,72 @@
+#pragma once
+
+// 3rdparty lib includes
+#include <ring-buffer.h>
+
+// local includes
+#include "displaywithtitle.h"
+#include "textinterface.h"
+#include "widgets/label.h"
+#include "widgets/graph.h"
+#include "tftinstance.h"
+
+namespace espgui {
+template<size_t COUNT>
+class GraphAccessorInterface
+{
+public:
+    virtual std::array<std::reference_wrapper<const ring_buffer<float, 200>>, COUNT> getBuffers() const = 0;
+};
+
+template<typename T>
+class SingleGraphAccessor : public virtual GraphAccessorInterface<1>
+{
+public:
+    Graph<200, 1>::Container getBuffers() const
+    {
+        return {T{}.getBuffer()};
+    }
+};
+
+template<typename T1, typename T2>
+class DualGraphAccessor : public virtual GraphAccessorInterface<2>
+{
+public:
+    Graph<200, 2>::Container getBuffers() const
+    {
+        return {T1{}.getBuffer(), T2{}.getBuffer()};
+    }
+};
+
+template<size_t COUNT>
+class GraphDisplay :
+    public DisplayWithTitle,
+    public virtual GraphAccessorInterface<COUNT>
+{
+    using Base = DisplayWithTitle;
+
+public:
+    void initScreen() override;
+    void redraw() override;
+
+private:
+    static constexpr int screenHeight = 320, topMargin = 40, bottomMargin = 10, labelOffset = -5;
+    static constexpr int graphHeight = screenHeight-topMargin-bottomMargin;
+
+    Graph<200, COUNT> m_graph{0, 40, 270};
+};
+
+template<size_t COUNT>
+void GraphDisplay<COUNT>::initScreen()
+{
+    Base::initScreen();
+
+    m_graph.start(static_cast<const GraphAccessorInterface<COUNT> &>(*this).getBuffers());
+}
+
+template<size_t COUNT>
+void GraphDisplay<COUNT>::redraw()
+{
+    m_graph.redraw(static_cast<const GraphAccessorInterface<COUNT> &>(*this).getBuffers());
+}
+}
diff --git a/src/splitgraphdisplay.cpp b/src/splitgraphdisplay.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/src/splitgraphdisplay.h b/src/splitgraphdisplay.h
new file mode 100644
index 0000000..cc42ed9
--- /dev/null
+++ b/src/splitgraphdisplay.h
@@ -0,0 +1,83 @@
+#pragma once
+
+#include "display.h"
+#include "textinterface.h"
+#include "widgets/label.h"
+#include "widgets/graph.h"
+
+namespace espgui {
+template<std::size_t COUNT>
+class TopGraphAccessorInterface
+{
+public:
+    virtual typename Graph<200, COUNT>::Container getTopBuffers() const = 0;
+};
+
+template<typename T>
+class SingleTopGraphAccessor : public virtual TopGraphAccessorInterface<1>
+{
+public:
+    typename Graph<200, 1>::Container getTopBuffers() const override
+    {
+        return {T{}.getBuffer()};
+    }
+};
+
+template<std::size_t COUNT>
+class BottomGraphAccessorInterface
+{
+public:
+    virtual typename Graph<200, COUNT>::Container getBottomBuffers() const = 0;
+};
+
+template<typename T>
+class SingleBottomGraphAccessor : public virtual BottomGraphAccessorInterface<1>
+{
+public:
+    typename Graph<200, 1>::Container getBottomBuffers() const override
+    {
+        return {T{}.getBuffer()};
+    }
+};
+
+template<std::size_t COUNT0, std::size_t COUNT1>
+class SplitGraphDisplay :
+        public Display,
+        public virtual TextInterface,
+        public virtual TopGraphAccessorInterface<COUNT0>,
+        public virtual BottomGraphAccessorInterface<COUNT1>
+{
+public:
+    void initScreen() override;
+    void redraw() override;
+
+private:
+    Label m_titleLabel{5, 5}; // 230, 25
+
+    Graph<200, COUNT0> m_graph0{0, 40, 133};
+    Graph<200, COUNT1> m_graph1{0, 179, 133};
+};
+
+template<std::size_t COUNT0, std::size_t COUNT1>
+void SplitGraphDisplay<COUNT0, COUNT1>::initScreen()
+{
+    tft.fillScreen(TFT_BLACK);
+
+    m_titleLabel.start();
+    tft.fillRect(0, 34, tft.width(), 3, TFT_WHITE);
+
+    m_graph0.start(static_cast<const TopGraphAccessorInterface<COUNT0>&>(*this).getTopBuffers());
+    m_graph1.start(static_cast<const BottomGraphAccessorInterface<COUNT1>&>(*this).getBottomBuffers());
+}
+
+template<std::size_t COUNT0, std::size_t COUNT1>
+void SplitGraphDisplay<COUNT0, COUNT1>::redraw()
+{
+    tft.setTextFont(4);
+    tft.setTextColor(TFT_YELLOW, TFT_BLACK);
+    m_titleLabel.redraw(text());
+
+    m_graph0.redraw(static_cast<const TopGraphAccessorInterface<COUNT0>&>(*this).getTopBuffers());
+    m_graph1.redraw(static_cast<const BottomGraphAccessorInterface<COUNT1>&>(*this).getBottomBuffers());
+}
+}
diff --git a/src/widgets/graph.h b/src/widgets/graph.h
index 117e11b..192c874 100644
--- a/src/widgets/graph.h
+++ b/src/widgets/graph.h
@@ -9,6 +9,7 @@
 
 // local includes
 #include "label.h"
+#include "tftinstance.h"
 
 namespace espgui {
 template<size_t LENGTH, size_t COUNT>