From 1cb5ed22d7772abe6f9893be90f26f46dbde39f7 Mon Sep 17 00:00:00 2001
From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Fri, 27 Dec 2013 18:32:55 +0100
Subject: [PATCH] simple dual gauge (vertical)

---
 src/ui/DualGauge.cpp | 32 +++++++++++++++++++++++++++++
 src/ui/DualGauge.h   | 48 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 80 insertions(+)
 create mode 100644 src/ui/DualGauge.cpp
 create mode 100644 src/ui/DualGauge.h

diff --git a/src/ui/DualGauge.cpp b/src/ui/DualGauge.cpp
new file mode 100644
index 0000000..55f9528
--- /dev/null
+++ b/src/ui/DualGauge.cpp
@@ -0,0 +1,32 @@
+#include "DualGauge.h"
+
+#include "../graphics/Canvas.h"
+
+#include <algorithm>
+#include <cmath>
+
+
+namespace space {
+
+void DualGauge::Render(Canvas &canv, float val) const {
+	canv.SetColor(borderCol);
+	canv.OutlineRect(pos, size);
+
+	canv.SetColor(bgCol);
+	canv.FillRect(bgPos, bgSize);
+
+	if (val == 0) return;
+
+	Vector<int> vSize(valSize.x, valSize.y * std::abs(val));
+
+	if (val > 0) {
+		Vector<int> vPos(valPos.x, valPos.y - vSize.y);
+		canv.SetColor(posCol);
+		canv.FillRect(vPos, vSize);
+	} else {
+		canv.SetColor(negCol);
+		canv.FillRect(valPos, vSize);
+	}
+}
+
+}
diff --git a/src/ui/DualGauge.h b/src/ui/DualGauge.h
new file mode 100644
index 0000000..9aa30e3
--- /dev/null
+++ b/src/ui/DualGauge.h
@@ -0,0 +1,48 @@
+#ifndef SPACE_DUALGAUGE_H_
+#define SPACE_DUALGAUGE_H_
+
+#include "../graphics/Color.h"
+#include "../graphics/Vector.h"
+
+
+namespace space {
+
+class Canvas;
+
+class DualGauge {
+
+public:
+	constexpr DualGauge(
+		Vector<int> size,
+		Vector<int> pos,
+		Color borderCol,
+		Color bgCol,
+		Color posCol,
+		Color negCol)
+	: pos(pos), size(size)
+	, bgPos(pos + Vector<int>(1, 1)), bgSize(size - Vector<int>(2, 2))
+	, valPos(pos.x + 2, pos.y + 2 + (size.y - 4) / 2)
+	, valSize(size.x - 4, (size.y - 4) / 2)
+	, borderCol(borderCol), bgCol(bgCol)
+	, posCol(posCol), negCol(negCol) { }
+
+public:
+	void Render(Canvas &, float value) const;
+
+private:
+	Vector<int> pos;
+	Vector<int> size;
+	Vector<int> bgPos;
+	Vector<int> bgSize;
+	Vector<int> valPos;
+	Vector<int> valSize;
+	Color borderCol;
+	Color bgCol;
+	Color posCol;
+	Color negCol;
+
+};
+
+}
+
+#endif
-- 
2.39.2