1 files changed, 35 insertions, 0 deletions

diff --git a/gui.h b/gui.h
new file mode 100644
index 0000000..9bd8545
--- /dev/null
+++ b/gui.h
@@ -0,0 +1,35 @@
+#pragma once
+
+#include <vector>
+#include "sequence.h"
+
+struct SDL_Renderer;
+
+class Knob {
+public:
+	Knob(int x, int y, float* valuePtr, float scaling = 1.f)
+		: m_x(x), m_y(y), value(valuePtr), valueScaling(scaling) {}
+
+	void Draw(SDL_Renderer*);
+	bool InBounds(int x, int y);
+
+	float* value;
+	float valueScaling;
+private:
+	int m_x, m_y;
+};
+
+class GUI {
+public:
+	GUI(Sequence&);
+
+	void OnMouseDown(int x, int y);
+	void OnMouseUp();
+	void OnMouseMove(int x, int y);
+
+	void Repaint(SDL_Renderer*, int currentStep);
+private:
+	std::vector<Knob> m_knobs;
+	Knob* m_activeKnob{ nullptr };
+	int m_dragStart{ 0 };
+};
\ No newline at end of file