From c9bc807ce46361e6cf0953ecc30a599646e2947b Mon Sep 17 00:00:00 2001
From: Hugo Locurcio <hugo.locurcio@hugo.pro>
Date: Sun, 9 Jun 2019 22:33:50 +0200
Subject: [PATCH] Dim the project manager window while it's quitting

This makes it clearer that the project manager window is busy
while it's quitting (which can take a while on slower PCs).
This also makes it feel more responsive to user input.
---
 editor/project_manager.cpp | 19 +++++++++++++++++++
 editor/project_manager.h   |  1 +
 2 files changed, 20 insertions(+)

diff --git a/editor/project_manager.cpp b/editor/project_manager.cpp
index 7b521aba13f..3fd497ed7b7 100644
--- a/editor/project_manager.cpp
+++ b/editor/project_manager.cpp
@@ -961,9 +961,25 @@ void ProjectManager::_notification(int p_what) {
 
 			set_process_unhandled_input(is_visible_in_tree());
 		} break;
+		case NOTIFICATION_WM_QUIT_REQUEST: {
+
+			_dim_window();
+		} break;
 	}
 }
 
+void ProjectManager::_dim_window() {
+
+	// This method must be called before calling `get_tree()->quit()`.
+	// Otherwise, its effect won't be visible
+
+	// Dim the project manager window while it's quitting to make it clearer that it's busy.
+	// No transition is applied, as the effect needs to be visible immediately
+	float c = 1.0f - float(EDITOR_GET("interface/editor/dim_amount"));
+	Color dim_color = Color(c, c, c);
+	gui_base->set_modulate(dim_color);
+}
+
 void ProjectManager::_panel_draw(Node *p_hb) {
 
 	HBoxContainer *hb = Object::cast_to<HBoxContainer>(p_hb);
@@ -1514,6 +1530,7 @@ void ProjectManager::_open_selected_projects() {
 		ERR_FAIL_COND(err);
 	}
 
+	_dim_window();
 	get_tree()->quit();
 }
 
@@ -1780,11 +1797,13 @@ void ProjectManager::_restart_confirm() {
 	Error err = OS::get_singleton()->execute(exec, args, false, &pid);
 	ERR_FAIL_COND(err);
 
+	_dim_window();
 	get_tree()->quit();
 }
 
 void ProjectManager::_exit_dialog() {
 
+	_dim_window();
 	get_tree()->quit();
 }
 
diff --git a/editor/project_manager.h b/editor/project_manager.h
index fa878e75a6b..a7cc6549f5c 100644
--- a/editor/project_manager.h
+++ b/editor/project_manager.h
@@ -110,6 +110,7 @@ class ProjectManager : public Control {
 
 	void _install_project(const String &p_zip_path, const String &p_title);
 
+	void _dim_window();
 	void _panel_draw(Node *p_hb);
 	void _panel_input(const Ref<InputEvent> &p_ev, Node *p_hb);
 	void _unhandled_input(const Ref<InputEvent> &p_ev);