ProcessManager: Use a single timer for refreshing the view.

Also add a menu for changing the update frequency to some nice values.

Applications/ProcessManager/MemoryStatsWidget.cpp

@@ -37,7 +37,6 @@ MemoryStatsWidget::MemoryStatsWidget(GWidget* parent)
     m_kmalloc_label = build_widgets_for_label("Kernel heap:");
     m_kmalloc_count_label = build_widgets_for_label("Calls kmalloc/kfree:");
 
-    start_timer(1000);
     refresh();
 }
 

Applications/ProcessManager/ProcessTableView.cpp

@@ -8,15 +8,14 @@ ProcessTableView::ProcessTableView(GWidget* parent)
 {
     set_model(GSortingProxyModel::create(ProcessModel::create()));
     model()->set_key_column_and_sort_order(ProcessModel::Column::CPU, GSortOrder::Descending);
-    start_timer(1000);
-    model()->update();
+    refresh();
 }
 
 ProcessTableView::~ProcessTableView()
 {
 }
 
-void ProcessTableView::timer_event(CTimerEvent&)
+void ProcessTableView::refresh()
 {
     model()->update();
 }

Applications/ProcessManager/ProcessTableView.h

@@ -13,10 +13,9 @@ public:
 
     pid_t selected_pid() const;
 
-protected:
-    virtual void model_notification(const GModelNotification&) override;
+    void refresh();
 
 private:
-    virtual void timer_event(CTimerEvent&) override;
+    virtual void model_notification(const GModelNotification&) override;
 };
 

Applications/ProcessManager/main.cpp

@@ -1,3 +1,4 @@
+#include <LibCore/CTimer.h>
 #include <LibGUI/GWindow.h>
 #include <LibGUI/GWidget.h>
 #include <LibGUI/GBoxLayout.h>
@@ -20,8 +21,12 @@ int main(int argc, char** argv)
 
     auto* toolbar = new GToolBar(widget);
     auto* process_table_view = new ProcessTableView(widget);
+    auto* memory_stats_widget = new MemoryStatsWidget(widget);
 
-    new MemoryStatsWidget(widget);
+    auto* refresh_timer = new CTimer(1000, [&] {
+        process_table_view->refresh();
+        memory_stats_widget->refresh();
+    });
 
     auto kill_action = GAction::create("Kill process", GraphicsBitmap::load_from_file("/res/icons/kill16.png"), [process_table_view] (const GAction&) {
         pid_t pid = process_table_view->selected_pid();
@@ -59,6 +64,21 @@ int main(int argc, char** argv)
     process_menu->add_action(continue_action.copy_ref());
     menubar->add_menu(move(process_menu));
 
+    auto frequency_menu = make<GMenu>("Frequency");
+    frequency_menu->add_action(GAction::create("0.5 sec", [refresh_timer] (auto&) {
+        refresh_timer->restart(500);
+    }));
+    frequency_menu->add_action(GAction::create("1 sec", [refresh_timer] (auto&) {
+        refresh_timer->restart(1000);
+    }));
+    frequency_menu->add_action(GAction::create("3 sec", [refresh_timer] (auto&) {
+        refresh_timer->restart(3000);
+    }));
+    frequency_menu->add_action(GAction::create("5 sec", [refresh_timer] (auto&) {
+        refresh_timer->restart(5000);
+    }));
+    menubar->add_menu(move(frequency_menu));
+
     auto help_menu = make<GMenu>("Help");
     help_menu->add_action(GAction::create("About", [] (const GAction&) {
         dbgprintf("FIXME: Implement Help/About\n");