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Ayaan Tunio
2025-02-12 09:54:05 -05:00
commit 7118adc514
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userland/applications/activity_monitor/ViewController.h Normal file
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#pragma once
#include "GraphView.h"
#include <libfoundation/ProcessInfo.h>
#include <libui/App.h>
#include <libui/Button.h>
#include <libui/Label.h>
#include <libui/StackView.h>
#include <libui/View.h>
#include <libui/ViewController.h>
#include <libui/Window.h>
#include <memory>
#include <sys/types.h>
static char buf[256];
class ViewController : public UI::ViewController<UI::View> {
public:
ViewController(UI::View& view)
: UI::ViewController<UI::View>(view)
, m_cpu_count(LFoundation::ProcessInfo::the().processor_count())
{
}
virtual ~ViewController() = default;
inline int cpu_count() const { return m_cpu_count; }
void view_did_load() override
{
state.cpu_load.resize(cpu_count());
state.cpu_old_user_time.resize(cpu_count());
state.cpu_old_system_time.resize(cpu_count());
state.cpu_old_idle_time.resize(cpu_count());
view().set_background_color(LG::Color::LightSystemBackground);
auto& header = view().add_subview<UI::View>(LG::Rect(0, 0, 0, 0));
header.set_background_color(LG::Color(222, 232, 227));
auto& label = header.add_subview<UI::Label>(LG::Rect(0, 0, 16, 22));
label.set_text_color(LG::Color(14, 72, 19));
label.set_text("Monitor");
label.set_font(LG::Font::system_bold_font(LG::Font::SystemTitleSize));
label.set_width(label.preferred_width());
auto& switch_tab = view().add_subview<UI::StackView>(LG::Rect(0, 0, 102, 18));
switch_tab.set_spacing(8);
switch_tab.layer().set_corner_mask(LG::CornerMask(4));
switch_tab.layer().set_shading(LG::Shading(LG::Shading::Box));
switch_tab.set_spacing(4);
auto& cpu_tab = switch_tab.add_arranged_subview<UI::Button>();
cpu_tab.set_content_edge_insets(UI::EdgeInsets(4, 10, 4, 10));
cpu_tab.set_background_color(LG::Color(248, 250, 231));
cpu_tab.set_title("CPU");
cpu_tab.set_title_color(LG::Color::DarkSystemText);
auto& mem_tab = switch_tab.add_arranged_subview<UI::Button>();
mem_tab.set_content_edge_insets(UI::EdgeInsets(4, 10, 4, 10));
mem_tab.set_background_color(LG::Color::White);
mem_tab.set_title("Memory");
mem_tab.set_title_color(LG::Color::DarkSystemText);
auto& cpu_label = view().add_subview<UI::Label>(LG::Rect(0, 0, 180, 16));
auto& cpu_graphs_stackview = view().add_subview<UI::StackView>(LG::Rect(0, 0, 184, 100));
cpu_graphs_stackview.set_distribution(UI::StackView::Distribution::FillEqually);
cpu_graphs_stackview.set_spacing(10);
view().add_constraint(UI::Constraint(header, UI::Constraint::Attribute::Left, UI::Constraint::Relation::Equal, 0));
view().add_constraint(UI::Constraint(header, UI::Constraint::Attribute::Top, UI::Constraint::Relation::Equal, 0));
view().add_constraint(UI::Constraint(header, UI::Constraint::Attribute::Right, UI::Constraint::Relation::Equal, 0));
view().add_constraint(UI::Constraint(header, UI::Constraint::Attribute::Height, UI::Constraint::Relation::Equal, 60));
view().add_constraint(UI::Constraint(label, UI::Constraint::Attribute::Left, UI::Constraint::Relation::Equal, UI::SafeArea::Left));
view().add_constraint(UI::Constraint(label, UI::Constraint::Attribute::CenterY, UI::Constraint::Relation::Equal, header, UI::Constraint::Attribute::CenterY, 1, 0));
view().add_constraint(UI::Constraint(switch_tab, UI::Constraint::Attribute::Left, UI::Constraint::Relation::Equal, UI::SafeArea::Left));
view().add_constraint(UI::Constraint(switch_tab, UI::Constraint::Attribute::CenterY, UI::Constraint::Relation::Equal, header, UI::Constraint::Attribute::Bottom, 1, 0));
view().add_constraint(UI::Constraint(cpu_label, UI::Constraint::Attribute::Left, UI::Constraint::Relation::Equal, UI::SafeArea::Left));
view().add_constraint(UI::Constraint(cpu_label, UI::Constraint::Attribute::Bottom, UI::Constraint::Relation::Equal, UI::SafeArea::Bottom));
view().add_constraint(UI::Constraint(cpu_graphs_stackview, UI::Constraint::Attribute::Left, UI::Constraint::Relation::Equal, UI::SafeArea::Left));
view().add_constraint(UI::Constraint(cpu_graphs_stackview, UI::Constraint::Attribute::Right, UI::Constraint::Relation::Equal, UI::SafeArea::Right));
view().add_constraint(UI::Constraint(cpu_graphs_stackview, UI::Constraint::Attribute::Top, UI::Constraint::Relation::Equal, switch_tab, UI::Constraint::Attribute::Bottom, 1, 8));
view().add_constraint(UI::Constraint(cpu_graphs_stackview, UI::Constraint::Attribute::Bottom, UI::Constraint::Relation::Equal, cpu_label, UI::Constraint::Attribute::Top, 1, -8));
for (int i = 0; i < cpu_count(); i++) {
auto& graph = cpu_graphs_stackview.add_arranged_subview<GraphView>(200);
cpu_graphs_stackview.add_constraint(UI::Constraint(graph, UI::Constraint::Attribute::Height, UI::Constraint::Relation::Equal, cpu_graphs_stackview, UI::Constraint::Attribute::Height, 1, 0));
cpu_graphs.push_back(&graph);
}
view().set_needs_layout();
UI::App::the().event_loop().add(LFoundation::Timer([&] {
update_data();
cpu_label.set_text(std::string("Load ") + std::to_string(state.cpu_load[0]) + "%");
cpu_label.set_needs_display();
},
1000, LFoundation::Timer::Repeat));
}
int update_cpu_load()
{
int fd_proc_stat = open("/proc/stat", O_RDONLY);
int offset = 0;
read(fd_proc_stat, buf, sizeof(buf));
for (int i = 0; i < cpu_count(); i++) {
int user_time, system_time, idle_time;
int num;
offset += sscanf(buf + offset, "cpu%d %d 0 %d %d\n", &num, &user_time, &system_time, &idle_time);
int diff_user_time = user_time - state.cpu_old_user_time[i];
int diff_system_time = system_time - state.cpu_old_system_time[i];
int diff_idle_time = idle_time - state.cpu_old_idle_time[i];
state.cpu_old_user_time[i] = user_time;
state.cpu_old_system_time[i] = system_time;
state.cpu_old_idle_time[i] = idle_time;
if (diff_user_time + diff_system_time + diff_idle_time == 0) {
state.cpu_load[i] = 0;
} else {
state.cpu_load[i] = (diff_user_time + diff_system_time) * 100 / (diff_user_time + diff_system_time + diff_idle_time);
}
cpu_graphs[i]->add_new_value(state.cpu_load[i]);
}
close(fd_proc_stat);
return 0;
}
void update_data()
{
update_cpu_load();
}
private:
int m_cpu_count;
int fd_proc_stat;
std::vector<GraphView*> cpu_graphs;
struct State {
std::vector<int> cpu_load;
std::vector<int> cpu_old_user_time;
std::vector<int> cpu_old_system_time;
std::vector<int> cpu_old_idle_time;
};
State state;
};