From b38f0927c7d1c055513d436d04b392113bd30781 Mon Sep 17 00:00:00 2001
From: Piotr Wasilewski <piwasilewski@interia.pl>
Date: Wed, 12 Jul 2023 21:21:04 +0200
Subject: [PATCH] wip: working on improved cursors

---
 src/Gui/Gui.cpp                         | 15 +++++++++------
 src/ScrollingBuffer/ScrollingBuffer.hpp | 13 +++++++++++++
 2 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/src/Gui/Gui.cpp b/src/Gui/Gui.cpp
index 4371b75a..06cfed99 100644
--- a/src/Gui/Gui.cpp
+++ b/src/Gui/Gui.cpp
@@ -525,12 +525,13 @@ void Gui::drawPlotCurveBar(Plot* plot, ScrollingBuffer<double>& time, std::map<s
 				double markerPos = plot->getMarkerValueX0();
 				if (markerPos == 0.0)
 				{
-					markerPos = plotLimits.X.Min * 1.1f;
+					markerPos = plotLimits.X.Min + ((std::abs(plotLimits.X.Max) - std::abs(plotLimits.X.Min)) / 3.0f);
 					plot->setMarkerValueX0(markerPos);
 				}
 				ImPlot::DragLineX(0, &markerPos, ImVec4(1, 0, 1, 1));
 				plot->setMarkerValueX0(markerPos);
-				ImPlot::Annotation(markerPos, 0, ImVec4(0, 0, 0, 0), ImVec2(-10, -100), true, "x0 %.5f", markerPos);
+
+				ImPlot::Annotation(markerPos, plotLimits.Y.Max, ImVec4(0, 0, 0, 0), ImVec2(-10, 0), true, "x0 %.5f", markerPos);
 			}
 			else
 				plot->setMarkerValueX0(0.0);
@@ -540,14 +541,14 @@ void Gui::drawPlotCurveBar(Plot* plot, ScrollingBuffer<double>& time, std::map<s
 				double markerPos = plot->getMarkerValueX1();
 				if (markerPos == 0.0)
 				{
-					markerPos = plotLimits.X.Max * 0.9f;
+					markerPos = plotLimits.X.Min + (2.0f * (std::abs(plotLimits.X.Max) - std::abs(plotLimits.X.Min)) / 3.0f);
 					plot->setMarkerValueX1(markerPos);
 				}
 				ImPlot::DragLineX(1, &markerPos, ImVec4(1, 1, 0, 1));
 				plot->setMarkerValueX1(markerPos);
-				ImPlot::Annotation(markerPos, 0, ImVec4(0, 0, 0, 0), ImVec2(10, -100), true, "x1 %.5f", markerPos);
+				ImPlot::Annotation(markerPos, plotLimits.Y.Max, ImVec4(0, 0, 0, 0), ImVec2(10, 0), true, "x1 %.5f", markerPos);
 				double dx = markerPos - plot->getMarkerValueX0();
-				ImPlot::Annotation(markerPos, 0, ImVec4(0, 0, 0, 0), ImVec2(10, 100), true, "x1-x0 %.5f", dx);
+				ImPlot::Annotation(markerPos, plotLimits.Y.Max, ImVec4(0, 0, 0, 0), ImVec2(10, 20), true, "x1-x0 %.5f", dx);
 			}
 			else
 				plot->setMarkerValueX1(0.0);
@@ -569,9 +570,11 @@ void Gui::drawPlotCurveBar(Plot* plot, ScrollingBuffer<double>& time, std::map<s
 			{
 				if (!serPtr->visible)
 					continue;
+				double value = *(serPtr->buffer->getFirstElementCopy() + time.getIndexFromvalue(plot->getMarkerValueX0()));
 				ImPlot::SetNextLineStyle(ImVec4(serPtr->var->getColor().r, serPtr->var->getColor().g, serPtr->var->getColor().b, 1.0f));
 				ImPlot::SetNextMarkerStyle(ImPlotMarker_Circle, 2.0f);
-				ImPlot::PlotLine(serPtr->var->getName().c_str(), time.getFirstElementCopy(), serPtr->buffer->getFirstElementCopy(), size, 0, offset, sizeof(double));
+				auto name = plot->getMarkerStateX0() ? (key + " = " + std::to_string(value)) : key;
+				ImPlot::PlotLine(name.c_str(), time.getFirstElementCopy(), serPtr->buffer->getFirstElementCopy(), size, 0, offset, sizeof(double));
 			}
 
 			ImPlot::EndPlot();
diff --git a/src/ScrollingBuffer/ScrollingBuffer.hpp b/src/ScrollingBuffer/ScrollingBuffer.hpp
index 6fea5cca..2acddaba 100644
--- a/src/ScrollingBuffer/ScrollingBuffer.hpp
+++ b/src/ScrollingBuffer/ScrollingBuffer.hpp
@@ -68,6 +68,19 @@ class ScrollingBuffer
 		maxSize = newMaxSize;
 	}
 
+	uint32_t getIndexFromvalue(double value)
+	{
+		for (uint32_t t = 0; t < getSize(); t++)
+		{
+			double first = dataCopy[t];
+			double second = dataCopy[t + 1];
+
+			if (value >= first && value <= second)
+				return t;
+		}
+		return 0;
+	}
+
    private:
 	mutable std::mutex mtx;
 	uint32_t maxSize = 10000;