/
hello_world.cpp
136 lines (107 loc) · 3.76 KB
/
hello_world.cpp
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#include "hello_world.hpp"
#include <iostream>
using namespace std;
HelloWorld::HelloWorld()
// creates a new button with label "Hello World".
: btn_hello("Hello World"), btn_goodbye("Goodbye World"),
tgl_hello("Hello World (run)"),
tgl_goodbye("Goodbye World (run)"),
scl_rate(50, 2000, 50),
rate(500),
level(0.8) {
scl_rate.set_value(rate);
set_size_request(600, 600);
// Sets the border width of the window.
set_border_width(10);
// When the button receives the "clicked" signal, it will call the
// on_button_clicked() method defined below.
btn_hello.signal_clicked().connect(sigc::mem_fun(*this,
&HelloWorld::on_hello_clicked));
tgl_hello.signal_clicked().connect(sigc::mem_fun(*this,
&HelloWorld::on_toggle_hello_clicked));
btn_goodbye.signal_clicked().connect(sigc::mem_fun(*this,
&HelloWorld::on_goodbye_clicked));
tgl_goodbye.signal_clicked().connect(sigc::mem_fun(*this,
&HelloWorld::on_toggle_goodbye_clicked));
scl_rate.signal_value_changed().connect(sigc::mem_fun(*this,
&HelloWorld::on_rate_changed));
ara_canvas.signal_expose_event().connect(
sigc::mem_fun(*this, &HelloWorld::on_canvas_expose));
box_v.pack_start(box_h, false, false);
box_h.pack_start(btn_hello, false, false);
box_h.pack_start(btn_goodbye, false, false);
box_h.pack_start(tgl_hello, false, false);
box_h.pack_start(tgl_goodbye, false, false);
box_h.pack_start(scl_rate, true, true);
box_v.pack_start(ara_canvas);
add(box_v);
show_all_children();
}
HelloWorld::~HelloWorld() {}
void HelloWorld::on_rate_changed() {
rate = scl_rate.get_value();
}
void HelloWorld::on_hello_clicked() {
update_hello();
}
bool HelloWorld::on_toggle_hello_timeout() {
if(tgl_hello.get_active()) {
update_hello();
Glib::signal_timeout().connect(
sigc::mem_fun(*this, &HelloWorld::on_toggle_hello_timeout),
rate);
}
}
void HelloWorld::on_toggle_hello_clicked() {
tgl_goodbye.set_active(false);
on_toggle_hello_timeout();
}
void HelloWorld::update_hello() {
std::cout << "Hello World" << std::endl;
level /= 0.9;
update_canvas();
}
bool HelloWorld::on_toggle_goodbye_timeout() {
if(tgl_goodbye.get_active()) {
update_goodbye();
Glib::signal_timeout().connect(
sigc::mem_fun(*this, &HelloWorld::on_toggle_goodbye_timeout),
rate);
}
}
void HelloWorld::on_toggle_goodbye_clicked() {
tgl_hello.set_active(false);
on_toggle_goodbye_timeout();
}
void HelloWorld::on_goodbye_clicked() {
update_goodbye();
}
void HelloWorld::update_goodbye() {
std::cout << "Goodbye World" << std::endl;
level *= 0.9;
update_canvas();
}
bool HelloWorld::on_canvas_expose(GdkEventExpose* event) {
Cairo::RefPtr<Cairo::Context> context = ara_canvas.get_window()->create_cairo_context();
context->rectangle(event->area.x, event->area.y, event->area.width,
event->area.height);
context->clip();
update_canvas();
return true;
}
void HelloWorld::update_canvas() {
Cairo::RefPtr<Cairo::Context> context = ara_canvas.get_window()->create_cairo_context();
update_canvas(context);
}
void HelloWorld::update_canvas(Cairo::RefPtr<Cairo::Context> &context) {
alc_allocation = ara_canvas.get_allocation();
int width = alc_allocation.get_width();
int height = alc_allocation.get_height();
cout << "width: " << width << ", height: " << height << endl;
context->save();
context->set_source_rgba(0, level, 0, 1);
context->scale(width, height);
context->rectangle(0, 0, 1, 1);
context->fill();
context->restore();
}