Add context popup on vertical axis menu to autofit.

Author: Tom Verbeure

src/ngscopeclient/WaveformArea.cpp

@@ -2718,6 +2718,14 @@ void WaveformArea::RenderYAxis(ImVec2 size, map<float, float>& gridmap, float vb
 			OnMouseWheelYAxis(wheel);
 	}
 
+	if(ImGui::BeginPopupContextWindow())
+	{
+		if(ImGui::MenuItem("Autofit")){
+			AutofitVertical();
+		}
+		ImGui::EndPopup();
+	}
+
 	//Trigger level arrow(s)
 	RenderTriggerLevelArrows(origin, size);
 
@@ -2779,35 +2787,7 @@ void WaveformArea::RenderYAxis(ImVec2 size, map<float, float>& gridmap, float vb
 
 		if(ImGui::IsMouseClicked(ImGuiMouseButton_Middle))
 		{
-			//Find the min and max of all currently displayed analog channels
-			//TODO: do we want to not allow autoscale on instrument inputs?
-			float vmax = FLT_MIN;
-			float vmin = FLT_MAX;
-			bool found = false;
-			for(auto& c : m_displayedChannels)
-			{
-				auto data = c->GetStream().GetData();
-				data->PrepareForCpuAccess();
-				auto sdata = dynamic_cast<SparseAnalogWaveform*>(data);
-				auto udata = dynamic_cast<UniformAnalogWaveform*>(data);
-				if(!sdata && !udata)
-					continue;
-
-				found = true;
-				vmax = max(vmax, Filter::GetMaxVoltage(sdata, udata));
-				vmin = min(vmin, Filter::GetMinVoltage(sdata, udata));
-			}
-
-			if(found)
-			{
-				auto off = (vmax + vmin) / 2;
-				auto range = (vmax - vmin) * 1.05;
-				for(auto& c : m_displayedChannels)
-				{
-					c->GetStream().SetOffset(-off);
-					c->GetStream().SetVoltageRange(range);
-				}
-			}
+			AutofitVertical();
 		}
 	}
 }
@@ -4420,3 +4400,37 @@ bool WaveformArea::IsStreamBeingDisplayed(StreamDescriptor target)
 	}
 	return false;
 }
+
+void WaveformArea::AutofitVertical()
+{
+	//Find the min and max of all currently displayed analog channels
+	//TODO: do we want to not allow autoscale on instrument inputs?
+	float vmax = FLT_MIN;
+	float vmin = FLT_MAX;
+	bool found = false;
+	for(auto& c : m_displayedChannels)
+	{
+		auto data = c->GetStream().GetData();
+		data->PrepareForCpuAccess();
+		auto sdata = dynamic_cast<SparseAnalogWaveform*>(data);
+		auto udata = dynamic_cast<UniformAnalogWaveform*>(data);
+		if(!sdata && !udata)
+			continue;
+
+		found = true;
+		vmax = max(vmax, Filter::GetMaxVoltage(sdata, udata));
+		vmin = min(vmin, Filter::GetMinVoltage(sdata, udata));
+	}
+
+	if(found)
+	{
+		auto off = (vmax + vmin) / 2;
+		auto range = (vmax - vmin) * 1.05;
+		for(auto& c : m_displayedChannels)
+		{
+			c->GetStream().SetOffset(-off);
+			c->GetStream().SetVoltageRange(range);
+		}
+	}
+}
+

src/ngscopeclient/WaveformArea.h

@@ -496,6 +496,8 @@ class WaveformArea : public SerializableObject
 	bool IsChannelBeingDragged();
 	StreamDescriptor GetChannelBeingDragged();
 
+	void AutofitVertical();
+
 	/**
 		@brief Gets the WaveformGroup for this area
 	 */