Editor: Dim UI when a WindowDialog is shown.

Darkens the editor on WindowDialog popup.

This adds the following new Editor settings:

- interface/dim_editor_on_dialog_popup (true) # Enable/Disable editor dimming
- interface/dim_amount (0.6) # Percentage of how much the editor will be darkened (0-1)
- interface/dim_transition_time # The duration (in seconds) of the color blending effect (0-1), 0 is instant.

Please test this thoroughly, I haven't yet seen a case where it fails to work properly but I'm sure I didn't test all
windows of the editor :P

editor/editor_node.cpp

@@ -4716,6 +4716,44 @@ void EditorNode::_open_imported() {
 	load_scene(open_import_request, true, false, true, true);
 }
 
+void EditorNode::dim_editor(bool p_dimming) {
+	static int dim_count = 0;
+	bool dim_ui = EditorSettings::get_singleton()->get("interface/dim_editor_on_dialog_popup");
+	if (p_dimming) {
+		if (dim_ui && dim_count == 0)
+			_start_dimming(true);
+		dim_count++;
+	} else {
+		dim_count--;
+		if (dim_count < 1)
+			_start_dimming(false);
+	}
+}
+
+void EditorNode::_start_dimming(bool p_dimming) {
+	_dimming = p_dimming;
+	_dim_time = 0.0f;
+	_dim_timer->start();
+}
+
+void EditorNode::_dim_timeout() {
+
+	_dim_time += _dim_timer->get_wait_time();
+	float wait_time = EditorSettings::get_singleton()->get("interface/dim_transition_time");
+
+	float c = 1.0f - (float)EditorSettings::get_singleton()->get("interface/dim_amount");
+
+	Color base = _dimming ? Color(1, 1, 1) : Color(c, c, c);
+	Color final = _dimming ? Color(c, c, c) : Color(1, 1, 1);
+
+	if (_dim_time + _dim_timer->get_wait_time() >= wait_time) {
+		gui_base->set_modulate(final);
+		_dim_timer->stop();
+	} else {
+		gui_base->set_modulate(base.linear_interpolate(final, _dim_time / wait_time));
+	}
+}
+
 void EditorNode::_bind_methods() {
 
 	ClassDB::bind_method("_menu_option", &EditorNode::_menu_option);
@@ -4792,6 +4830,7 @@ void EditorNode::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("_open_imported"), &EditorNode::_open_imported);
 	ClassDB::bind_method(D_METHOD("_inherit_imported"), &EditorNode::_inherit_imported);
+	ClassDB::bind_method(D_METHOD("_dim_timeout"), &EditorNode::_dim_timeout);
 
 	ADD_SIGNAL(MethodInfo("play_pressed"));
 	ADD_SIGNAL(MethodInfo("pause_pressed"));
@@ -6102,6 +6141,13 @@ EditorNode::EditorNode() {
 	FileAccess::set_file_close_fail_notify_callback(_file_access_close_error_notify);
 
 	waiting_for_first_scan = true;
+
+	_dimming = false;
+	_dim_time = 0.0f;
+	_dim_timer = memnew(Timer);
+	_dim_timer->set_wait_time(0.01666f);
+	_dim_timer->connect("timeout", this, "_dim_timeout");
+	add_child(_dim_timer);
 }
 
 EditorNode::~EditorNode() {

editor/editor_node.h

@@ -598,6 +598,13 @@ private:
 	void _tool_menu_insert_item(const ToolMenuItem &p_item);
 	void _rebuild_tool_menu() const;
 
+	bool _dimming;
+	float _dim_time;
+	Timer *_dim_timer;
+
+	void _start_dimming(bool p_dimming);
+	void _dim_timeout();
+
 protected:
 	void _notification(int p_what);
 	static void _bind_methods();
@@ -753,6 +760,8 @@ public:
 	void add_tool_submenu_item(const String &p_name, PopupMenu *p_submenu);
 	void remove_tool_menu_item(const String &p_name);
 
+	void dim_editor(bool p_dimming);
+
 	EditorNode();
 	~EditorNode();
 	void get_singleton(const char *arg1, bool arg2);

editor/editor_settings.cpp

@@ -502,6 +502,11 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 	hints["interface/custom_font"] = PropertyInfo(Variant::STRING, "interface/custom_font", PROPERTY_HINT_GLOBAL_FILE, "*.fnt", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED);
 	set("interface/custom_theme", "");
 	hints["interface/custom_theme"] = PropertyInfo(Variant::STRING, "interface/custom_theme", PROPERTY_HINT_GLOBAL_FILE, "*.res,*.tres,*.theme", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_RESTART_IF_CHANGED);
+	set("interface/dim_editor_on_dialog_popup", true);
+	set("interface/dim_amount", 0.6f);
+	hints["interface/dim_amount"] = PropertyInfo(Variant::REAL, "interface/dim_amount", PROPERTY_HINT_RANGE, "0,1,0.01", PROPERTY_USAGE_DEFAULT);
+	set("interface/dim_transition_time", 0.11f);
+	hints["interface/dim_transition_time"] = PropertyInfo(Variant::REAL, "interface/dim_transition_time", PROPERTY_HINT_RANGE, "0,1,0.001", PROPERTY_USAGE_DEFAULT);
 
 	set("filesystem/directories/autoscan_project_path", "");
 	hints["filesystem/directories/autoscan_project_path"] = PropertyInfo(Variant::STRING, "filesystem/directories/autoscan_project_path", PROPERTY_HINT_GLOBAL_DIR);

scene/gui/dialogs.cpp

@@ -31,6 +31,10 @@
 #include "print_string.h"
 #include "translation.h"
 
+#ifdef TOOLS_ENABLED
+#include "editor/editor_node.h"
+#endif
+
 void WindowDialog::_post_popup() {
 
 	drag_type = DRAG_NONE; // just in case
@@ -199,6 +203,16 @@ void WindowDialog::_notification(int p_what) {
 					set_default_cursor_shape(CURSOR_ARROW);
 			}
 		} break;
+#ifdef TOOLS_ENABLED
+		case NOTIFICATION_POST_POPUP: {
+			if (get_tree() && get_tree()->is_editor_hint())
+				EditorNode::get_singleton()->dim_editor(true);
+		} break;
+		case NOTIFICATION_POPUP_HIDE: {
+			if (get_tree() && get_tree()->is_editor_hint())
+				EditorNode::get_singleton()->dim_editor(false);
+		} break;
+#endif
 	}
 }