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Copy pathAGraph.cpp
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302 lines (252 loc) · 10.1 KB
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#include "AGraph.hpp"
#include <cairomm/context.h>
#include <fmt/format.h>
#include <algorithm>
#include <cmath>
#include <fstream>
#include <iostream>
#include <util/command.hpp>
#include "config.hpp"
namespace waybar {
AGraph::AGraph(const Json::Value& config, const std::string& name, const std::string& id,
uint16_t interval, bool enable_click, bool enable_scroll)
: AModule(config, name, id,
config["format-alt"].isString() || config["menu"].isString() || enable_click,
enable_scroll),
interval_(
config_["interval"] == "once"
? std::chrono::milliseconds::max()
: std::chrono::milliseconds(
config_["interval"].isNumeric()
? std::max(1L, static_cast<long>(config_["interval"].asDouble() * 1000))
: 1000L * static_cast<long>(interval))) {
graph_.signal_draw().connect(sigc::mem_fun(*this, &AGraph::onDraw));
graph_.set_name(name);
if (!id.empty()) {
graph_.get_style_context()->add_class(id);
}
graph_.get_style_context()->add_class(MODULE_CLASS);
if (config_["width"].isUInt()) {
graph_.set_size_request(config_["width"].asUInt(), -1);
} else {
graph_.set_size_request(100, -1);
}
event_box_.add(graph_);
if (config_["datapoints"].isUInt() && config_["datapoints"].asUInt() > 0) {
datapoints_ = config_["datapoints"].asUInt();
}
if (config_["graph_type"].isString()) {
std::string type = config_["graph_type"].asString();
if (type == "line") {
graph_type_ = GraphType::LINE;
} else if (type == "bar") {
graph_type_ = GraphType::BAR;
} else if (type == "gauge") {
graph_type_ = GraphType::GAUGE;
}
}
// If a GTKMenu is requested in the config
if (config_["menu"].isString()) {
// Create the GTKMenu widget
try {
// Check that the file exists
std::string menuFile = config_["menu-file"].asString();
// there might be "~" or "$HOME" in original path, try to expand it.
auto result = Config::tryExpandPath(menuFile, "");
if (result.empty()) {
throw std::runtime_error("Failed to expand file: " + menuFile);
}
menuFile = result.front();
// Read the menu descriptor file
std::ifstream file(menuFile);
if (!file.is_open()) {
throw std::runtime_error("Failed to open file: " + menuFile);
}
std::stringstream fileContent;
fileContent << file.rdbuf();
GtkBuilder* builder = gtk_builder_new();
// Make the GtkBuilder and check for errors in his parsing
if (gtk_builder_add_from_string(builder, fileContent.str().c_str(), -1, nullptr) == 0U) {
throw std::runtime_error("Error found in the file " + menuFile);
}
menu_ = gtk_builder_get_object(builder, "menu");
if (menu_ == nullptr) {
throw std::runtime_error("Failed to get 'menu' object from GtkBuilder");
}
submenus_ = std::map<std::string, GtkMenuItem*>();
menuActionsMap_ = std::map<std::string, std::string>();
// Linking actions to the GTKMenu based on
for (Json::Value::const_iterator it = config_["menu-actions"].begin();
it != config_["menu-actions"].end(); ++it) {
std::string key = it.key().asString();
submenus_[key] = GTK_MENU_ITEM(gtk_builder_get_object(builder, key.c_str()));
menuActionsMap_[key] = it->asString();
g_signal_connect(submenus_[key], "activate", G_CALLBACK(handleGtkMenuEvent),
(gpointer)menuActionsMap_[key].c_str());
}
} catch (std::runtime_error& e) {
spdlog::warn("Error while creating the menu : {}. Menu popup not activated.", e.what());
}
}
}
auto AGraph::update() -> void {
graph_.queue_draw();
AModule::update();
}
void AGraph::handleGtkMenuEvent(GtkMenuItem* /*menuitem*/, gpointer data) {
waybar::util::command::res res = waybar::util::command::exec((char*)data, "GtkMenu");
}
void AGraph::addValue(const int n) {
if (datapoints_ > 0 && values_.size() >= datapoints_) {
values_.pop_front();
}
values_.push_back(n);
}
bool AGraph::onDraw(const Cairo::RefPtr<Cairo::Context>& cr) {
const int width = graph_.get_allocated_width();
const int height = graph_.get_allocated_height() - 1;
if (values_.empty() || width <= 0 || height <= 0) {
return false;
}
auto style_context = graph_.get_style_context();
Gdk::RGBA fg_color = style_context->get_color(Gtk::STATE_FLAG_NORMAL);
Gdk::RGBA bg_color = fg_color;
bg_color.set_alpha(0.3);
cr->set_line_width(1.0);
const double step_width = static_cast<double>(width) / datapoints_;
const int values_count = values_.size();
const int empty_space = datapoints_ - values_count;
std::vector<std::pair<double, double>> points;
points.reserve(values_count);
for (int i = empty_space; i < datapoints_; ++i) {
double x = i * step_width;
int value_index = i - empty_space;
int value = values_[value_index];
double y = height - (static_cast<double>(value) / 100.0 * height);
points.emplace_back(x, y);
}
if (!points.empty()) {
switch (graph_type_) {
case GraphType::LINE:
drawFilledArea(cr, points, height, bg_color);
drawLine(cr, points, fg_color);
break;
case GraphType::BAR:
drawBars(cr, width, height, values_.empty() ? 0 : values_.back(), fg_color);
break;
case GraphType::GAUGE:
drawGauge(cr, width, height, values_.empty() ? 0 : values_.back(), fg_color);
break;
}
}
return false;
}
void AGraph::drawFilledArea(const Cairo::RefPtr<Cairo::Context>& cr,
const std::vector<std::pair<double, double>>& points, double height,
const Gdk::RGBA& bg_color) {
if (points.empty()) return;
double first_x = points.front().first;
double last_x = points.back().first;
drawPath(cr, points);
cr->line_to(last_x, height);
cr->line_to(first_x, height);
cr->close_path();
cr->set_source_rgba(bg_color.get_red(), bg_color.get_green(), bg_color.get_blue(),
bg_color.get_alpha());
cr->fill();
}
void AGraph::drawLine(const Cairo::RefPtr<Cairo::Context>& cr,
const std::vector<std::pair<double, double>>& points,
const Gdk::RGBA& fg_color) {
if (points.empty()) return;
cr->begin_new_path();
drawPath(cr, points);
cr->set_source_rgba(fg_color.get_red(), fg_color.get_green(), fg_color.get_blue(),
fg_color.get_alpha());
cr->stroke();
}
void AGraph::drawPath(const Cairo::RefPtr<Cairo::Context>& cr,
const std::vector<std::pair<double, double>>& points) {
if (points.empty()) return;
bool first_point = true;
for (const auto& point : points) {
if (first_point) {
cr->move_to(point.first, point.second);
first_point = false;
} else {
cr->line_to(point.first, point.second);
}
}
}
void AGraph::drawBars(const Cairo::RefPtr<Cairo::Context>& cr, double width, double height,
int current_value, const Gdk::RGBA& fg_color) {
current_value = std::min(100, std::max(0, current_value));
double green_height = height * (std::min(current_value, 40) / 100.0);
cr->set_source_rgba(fg_color.get_red(), fg_color.get_green(), fg_color.get_blue(), 0.5);
cr->rectangle(0, height - green_height, width, green_height);
cr->fill();
if (current_value > 40) {
double yellow_height = height * (std::min(current_value, 75) - 40) / 100.0;
cr->set_source_rgba(fg_color.get_red(), fg_color.get_green(), fg_color.get_blue(), 0.7);
cr->rectangle(0, height - green_height - yellow_height, width, yellow_height);
cr->fill();
}
if (current_value > 75) {
double orange_height = height * (std::min(current_value, 85) - 75) / 100.0;
cr->set_source_rgba(fg_color.get_red(), fg_color.get_green(), fg_color.get_blue(), 0.85);
double yellow_height = height * (std::min(current_value, 75) - 40) / 100.0;
cr->rectangle(0, height - green_height - yellow_height - orange_height, width, orange_height);
cr->fill();
}
if (current_value > 85) {
double red_height = height * (current_value - 85) / 100.0;
cr->set_source_rgba(fg_color.get_red(), fg_color.get_green(), fg_color.get_blue(), 1.0);
double yellow_height = height * (std::min(current_value, 75) - 40) / 100.0;
double orange_height = height * (std::min(current_value, 85) - 75) / 100.0;
cr->rectangle(0, height - green_height - yellow_height - orange_height - red_height, width,
red_height);
cr->fill();
}
double value_height = height * (current_value / 100.0);
cr->set_source_rgba(0.2, 0.2, 0.2, 0.8);
cr->rectangle(0, height - value_height, width, 2);
cr->fill();
}
void AGraph::drawGauge(const Cairo::RefPtr<Cairo::Context>& cr, double width, double height,
int current_value, const Gdk::RGBA& fg_color) {
double center_x = width / 2.0;
double center_y = height;
double radius = height / 2.0;
cr->set_line_width(10.0);
double angle1 = M_PI;
double angle2 = angle1 + 0.3 * angle1;
// Green section (0-33%)
cr->set_source_rgba(fg_color.get_red(), fg_color.get_green(), fg_color.get_blue(), 0.5);
cr->arc(center_x, center_y, radius, angle1, angle2);
cr->stroke();
// Yellow section (33-66%)
angle1 = angle2;
angle2 = angle1 + 0.3 * angle1;
cr->set_source_rgba(fg_color.get_red(), fg_color.get_green(), fg_color.get_blue(), 0.75);
cr->arc(center_x, center_y, radius, angle1, angle2);
cr->stroke();
// Red section (66-100%)
angle1 = angle2;
angle2 = 0.0;
cr->set_source_rgba(fg_color.get_red(), fg_color.get_green(), fg_color.get_blue(), 1.0);
cr->arc(center_x, center_y, radius, angle1, angle2);
cr->stroke();
// Draw needle
double percentage = std::min(100, std::max(0, current_value)) / 100.0;
double needle_angle = M_PI * percentage;
double needle_length = radius;
double needle_x = center_x - needle_length * cos(needle_angle);
double needle_y = center_y - needle_length * sin(needle_angle);
cr->set_source_rgba(1.0, 1.0, 1.0, 1.0);
cr->set_line_width(2.0);
cr->begin_new_path();
cr->move_to(center_x, center_y);
cr->line_to(needle_x, needle_y);
cr->stroke();
}
} // namespace waybar
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