fix: don't always update metrics on redraw

This prevents the graphs values from updating overly fast if you hold down the preset cycle key bind or the 1, 2, 3, or 4 keys.

Closes: https://github.com/aristocratos/btop/issues/1497

src/btop_draw.cpp

@@ -1562,6 +1562,7 @@ namespace Proc {
 	int user_size, thread_size, prog_size, cmd_size, tree_size;
 	int dgraph_x, dgraph_width, d_width, d_x, d_y;
 	bool previous_proc_banner_state = false;
+	atomic<bool> resized (false);
 
 	string box;
 
@@ -2206,8 +2207,10 @@ namespace Draw {
 		Global::overlay.clear();
 		Runner::pause_output = false;
 		Runner::redraw = true;
-		Proc::p_counters.clear();
-		Proc::p_graphs.clear();
+		if (not (Proc::resized or Global::resized)) {
+			Proc::p_counters.clear();
+			Proc::p_graphs.clear();
+		}
 		if (Menu::active) Menu::redraw = true;
 
 		Input::mouse_mappings.clear();

src/btop_input.cpp

@@ -254,9 +254,11 @@ namespace Input {
 						return;
 					}
 					Config::current_preset = -1;
+					if (Proc::shown) Proc::resized = true;
 					Draw::calcSizes();
 					Draw::update_clock(true);
-					Runner::run("all", false, true);
+					Proc::resized = false;
+					Runner::run("all", true, true);
 					return;
 				}
 				else if (is_in(key, "p", "P") and Config::preset_list.size() > 1) {
@@ -273,9 +275,11 @@ namespace Input {
 						Config::current_preset = old_preset;
 						return;
 					}
+					if (Proc::shown) Proc::resized = true;
 					Draw::calcSizes();
 					Draw::update_clock(true);
-					Runner::run("all", false, true);
+					Proc::resized = false;
+					Runner::run("all", true, true);
 					return;
 				} else if (is_in(key, "ctrl_r")) {
 					kill(getpid(), SIGUSR2);

src/btop_shared.hpp

@@ -354,6 +354,7 @@ namespace Proc {
 	extern int selected_pid, start, selected, collapse, expand, filter_found, selected_depth, toggle_children;
 	extern int scroll_pos;
 	extern string selected_name;
+	extern atomic<bool> resized;
 
 	//? Contains the valid sorting options for processes
 	const vector<string> sort_vector = {