From 9edde00fcf2c3eb2fa8c36ac2293da553298b5ac Mon Sep 17 00:00:00 2001
From: John Lewin <lewin76@gmail.com>
Date: Tue, 17 Oct 2017 12:55:58 -0700
Subject: [PATCH] Clear bed should invalidate GCode render data

- Disable 'File Not Found' messages on empty LoadedGCode
- Issue MatterHackers/MCCentral#2088
Clear bed should invalidate GCode render data
---
 ApplicationView/PrinterModels.cs    |  4 ++++
 PartPreviewWindow/PrinterTabPage.cs | 12 ++++++++++++
 PartPreviewWindow/ViewGcodeBasic.cs | 16 ++++++++--------
 3 files changed, 24 insertions(+), 8 deletions(-)

diff --git a/ApplicationView/PrinterModels.cs b/ApplicationView/PrinterModels.cs
index 8a6e4c1d5..9719a39d0 100644
--- a/ApplicationView/PrinterModels.cs
+++ b/ApplicationView/PrinterModels.cs
@@ -103,6 +103,10 @@ namespace MatterHackers.MatterControl
 
 			string mcxPath = Path.Combine(ApplicationDataStorage.Instance.PlatingDirectory, now + ".mcx");
 
+			// Clear existing
+			this.LoadedGCode = null;
+			this.GCodeRenderer = null;
+
 			this.printItem = new PrintItemWrapper(new PrintItem(now, mcxPath));
 
 			File.WriteAllText(mcxPath, new Object3D().ToJson());
diff --git a/PartPreviewWindow/PrinterTabPage.cs b/PartPreviewWindow/PrinterTabPage.cs
index f7483b266..d35d8c117 100644
--- a/PartPreviewWindow/PrinterTabPage.cs
+++ b/PartPreviewWindow/PrinterTabPage.cs
@@ -261,6 +261,18 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 		private void BedPlate_LoadedGCodeChanged(object sender, EventArgs e)
 		{
+			bool gcodeLoaded = sceneContext.LoadedGCode != null;
+
+			layerCountText.Visible = gcodeLoaded;
+			layerStartText.Visible = gcodeLoaded;
+			selectLayerSlider.Visible = gcodeLoaded;
+			layerRenderRatioSlider.Visible = gcodeLoaded;
+
+			if (!gcodeLoaded)
+			{
+				return;
+			}
+
 			var layerCount = sceneContext.LoadedGCode.LayerCount;
 			selectLayerSlider.Maximum = layerCount - 1;
 
diff --git a/PartPreviewWindow/ViewGcodeBasic.cs b/PartPreviewWindow/ViewGcodeBasic.cs
index 3c267976c..fac26f9d9 100644
--- a/PartPreviewWindow/ViewGcodeBasic.cs
+++ b/PartPreviewWindow/ViewGcodeBasic.cs
@@ -98,10 +98,10 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 				VAnchor = VAnchor.Stretch
 			};
 
-			if (!File.Exists(sceneContext.GCodePath))
-			{ 
-				SetProcessingMessage($"{fileNotFoundMessage}\n'{sceneContext.GCodePath}'");
-			}
+			//if (!File.Exists(sceneContext.GCodePath))
+			//{ 
+			//	SetProcessingMessage($"{fileNotFoundMessage}\n'{sceneContext.GCodePath}'");
+			//}
 
 			mainContainerTopToBottom.AddChild(gcodeDisplayWidget);
 
@@ -109,10 +109,10 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 			// *************** AddGCodeFileControls ***************
 			SetProcessingMessage("");
-			if (sceneContext.LoadedGCode == null)
-			{
-				SetProcessingMessage($"{fileNotFoundMessage}\n'{sceneContext.GCodePath}'");
-			}
+			//if (sceneContext.LoadedGCode == null)
+			//{
+			//	SetProcessingMessage($"{fileNotFoundMessage}\n'{sceneContext.GCodePath}'");
+			//}
 
 			if (sceneContext.LoadedGCode?.LineCount > 0)
 			{