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#include "check-visible.hpp"
#include "macros.hpp"
#include "timer.hpp"
#include "spinlock.hpp"
#include <QWidget>
#include <QDebug>
constexpr int visible_timeout = 1000;
constexpr int invisible_timeout = 250;
static Timer timer;
static std::atomic_flag lock = ATOMIC_FLAG_INIT;
static bool visible = true;
#if defined _WIN32
#include <windows.h>
void set_is_visible(const QWidget& w, bool force)
{
spinlock_guard l(lock);
HWND hwnd = (HWND)w.winId();
if (!force && timer.elapsed_ms() < (visible ? visible_timeout : invisible_timeout))
return;
timer.start();
if (RECT r; GetWindowRect(hwnd, &r))
{
const int x = r.left+1, y = r.top+1;
const int w = r.right - x - 1, h = r.bottom - y - 1;
const POINT xs[] {
{ x + w, y },
{ x, y + h },
{ x + w, h + y },
{ x, y },
{ x + w/2, y + h/2 },
};
visible = false;
for (const POINT& pt : xs)
if (WindowFromPoint(pt) == hwnd)
{
visible = true;
break;
}
}
else
{
eval_once(qDebug() << "check-visible: GetWindowRect failed");
visible = true;
}
}
#else
void set_is_visible(const QWidget&, bool)
{
}
void check_is_visible(bool)
{
}
#endif
bool check_is_visible()
{
spinlock_guard l(lock);
return visible;
}
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