1 files changed, 77 insertions, 0 deletions
diff --git a/src/gui.cpp b/src/gui.cpp
new file mode 100644
index 0000000..fcd4511
--- /dev/null
+++ b/src/gui.cpp
@@ -0,0 +1,77 @@
+#include "gui.h"
+
+#include "sequence.h"
+
+void Slider::Draw(SDL_Renderer* renderer)
+{
+	SDL_RenderDrawRect(renderer, &m_bounds);
+	SDL_RenderDrawLine(renderer, m_bounds.x, m_bounds.y + (*value * valueScaling), m_bounds.x + m_bounds.w, m_bounds.y + (*value * valueScaling));
+}
+
+bool Slider::InBounds(int x, int y)
+{
+	SDL_Point point = { x, y };
+	return SDL_PointInRect(&point, &m_bounds);
+}
+
+GUI::GUI(Sequence& seq)
+	: m_sequence(seq)
+{
+	int i = 0;
+	for (auto& step : seq.steps) {
+		m_sliders.emplace_back(i * 40 + 14, 60, &step.carrierFreq, 0.1f);
+		m_sliders.emplace_back(i * 40 + 14, 145, &step.modFreq);
+		m_sliders.emplace_back(i * 40 + 14, 230, &step.modDepth, 3.0f);
+		i++;
+	}
+}
+
+void GUI::OnMouseDown(int x, int y)
+{
+	for (Slider& slider : m_sliders) {
+		if (slider.InBounds(x, y)) {
+			m_activeSlider = &slider;
+			m_dragStart = y;
+			return;
+		}
+	}
+}
+
+void GUI::OnMouseUp()
+{
+	m_activeSlider = nullptr;
+	m_dragStart = 0;
+}
+
+void GUI::OnMouseMove(int x, int y)
+{
+	if (m_activeSlider) {
+		*m_activeSlider->value -= (m_dragStart - y) / m_activeSlider->valueScaling;
+		m_dragStart = y;
+
+		if (*m_activeSlider->value < 0)
+			*m_activeSlider->value = 0;
+	}
+}
+
+void GUI::Repaint(SDL_Renderer* renderer, int currentStep)
+{
+	SDL_Rect rect = { 10, 10, 32, 32 };
+
+	for (int i = 0; i < 8; i++) {
+		SDL_SetRenderDrawColor(renderer, m_sequence.steps[i].modDepth * 8, m_sequence.steps[i].modFreq * 2, m_sequence.steps[i].carrierFreq / 3, 255);
+
+		if (i == currentStep)
+			SDL_RenderFillRect(renderer, &rect);
+		else
+			SDL_RenderDrawRect(renderer, &rect);
+
+		rect.x += rect.w + 8;
+	}
+
+	SDL_SetRenderDrawColor(renderer, 127, 127, 255, 255);
+
+	for (Slider& slider : m_sliders) {
+		slider.Draw(renderer);
+	}
+}
+\ No newline at end of file