From 66227ae7448cb6b9a2b11ffab0c9de00e0f372ff Mon Sep 17 00:00:00 2001
From: CrispyPin <crispin@tasa.se>
Date: Tue, 6 Jun 2023 14:05:43 +0200
Subject: [PATCH] add transparency toggle

---
 bindings/action_manifest.json |  6 ++++++
 src/app.cpp                   | 17 +++++++++++++++++
 src/app.h                     |  2 ++
 3 files changed, 25 insertions(+)

diff --git a/bindings/action_manifest.json b/bindings/action_manifest.json
index 0c9128e..e9f2b6d 100644
--- a/bindings/action_manifest.json
+++ b/bindings/action_manifest.json
@@ -56,6 +56,11 @@
 			"requirement": "suggested",
 			"type": "vector2"
 		},
+		{
+			"name": "/actions/cursor/in/toggle_transparent",
+			"requirement": "suggested",
+			"type": "boolean"
+		},
 		{
 			"name": "/actions/cursor/out/scroll_haptic",
 			"requirement": "suggested",
@@ -89,6 +94,7 @@
 			"/actions/cursor/in/mouse_right": "right mouse button",
 			"/actions/cursor/in/mouse_middle": "middle mouse button",
 			"/actions/cursor/in/scroll": "scroll",
+			"/actions/cursor/in/toggle_transparent": "toggle transparency",
 			"/actions/cursor/out/scroll_haptic": "scrolling haptic feedback"
 		}
 	]
diff --git a/src/app.cpp b/src/app.cpp
index 72ff00a..7bbc85d 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -10,6 +10,7 @@
 const VRMat root_start_pose = {{{1, 0, 0, 0}, {0, 1, 0, 0.8f}, {0, 0, 1, 0}}}; // 0.8m above origin
 
 const int FRAME_INTERVAL = 4; // number of update loops until the frame buffer is updated
+const float TRANSPARENCY = 0.6f;
 
 App::App()
 {
@@ -75,6 +76,8 @@ App::App()
 		assert(action_err == 0);
 		action_err = vr_input->GetActionHandle("/actions/cursor/in/scroll", &_input_handles.cursor.scroll);
 		assert(action_err == 0);
+		action_err = vr_input->GetActionHandle("/actions/cursor/in/toggle_transparent", &_input_handles.cursor.toggle_transparent);
+		assert(action_err == 0);
 		action_err = vr_input->GetActionHandle("/actions/cursor/out/scroll_haptic", &_input_handles.cursor.scroll_haptic);
 		assert(action_err == 0);
 		action_err = vr_input->GetActionSetHandle("/actions/main", &_input_handles.main_set);
@@ -193,6 +196,20 @@ void App::UpdateInput(float dtime)
 		}
 		UpdateUIVisibility();
 	}
+	if (IsInputJustPressed(_input_handles.cursor.toggle_transparent))
+	{
+		_transparent = !_transparent;
+		if (_transparent)
+		{
+			for (auto &panel : _panels)
+				panel.GetOverlay()->SetAlpha(TRANSPARENCY);
+		}
+		else
+		{
+			for (auto &panel : _panels)
+				panel.GetOverlay()->SetAlpha(1);
+		}
+	}
 	if (!_hidden)
 	{
 		if (IsInputJustPressed(_input_handles.main.reset))
diff --git a/src/app.h b/src/app.h
index fa721ce..ecbbd79 100644
--- a/src/app.h
+++ b/src/app.h
@@ -33,6 +33,7 @@ struct InputHandles
 		vr::VRActionHandle_t mouse_middle;
 		vr::VRActionHandle_t scroll;
 		vr::VRActionHandle_t scroll_haptic;
+		vr::VRActionHandle_t toggle_transparent;
 	} cursor;
 	vr::VRActionSetHandle_t cursor_set;
 	struct
@@ -87,6 +88,7 @@ class App
 	Overlay _root_overlay;
 	std::vector<Panel> _panels;
 	bool _hidden = false;
+	bool _transparent = false;
 	bool _edit_mode = false;
 	std::optional<Controller *> _active_cursor;