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b0e3f73375
Userspace programs can now open /dev/gui_events and read a stream of GUI_Event structs one at a time. I was stuck on a stupid problem where we'd reenter Scheduler::yield() due to having one of the has_data_available_for_reading() implementations using locks.
84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
#include "Process.h"
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#include "MemoryManager.h"
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#include <LibC/errno_numbers.h>
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#include <Widgets/AbstractScreen.h>
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#include <Widgets/FrameBuffer.h>
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#include <Widgets/EventLoop.h>
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#include <Widgets/Font.h>
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#include <Widgets/Button.h>
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#include <Widgets/Label.h>
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#include <Widgets/Widget.h>
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#include <Widgets/Window.h>
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#include <Widgets/WindowManager.h>
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void Process::initialize_gui_statics()
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{
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Font::initialize();
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FrameBuffer::initialize();
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EventLoop::initialize();
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WindowManager::initialize();
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AbstractScreen::initialize();
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new EventLoop;
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}
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int Process::make_window_id()
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{
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int new_id = m_next_window_id++;
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while (!new_id || m_windows.contains(new_id))
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new_id = m_next_window_id++;
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return new_id;
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}
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static void wait_for_gui_server()
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{
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// FIXME: Time out after a while and return an error.
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while (!EventLoop::main().running())
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sleep(10);
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}
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int Process::gui$create_window(const GUI_CreateWindowParameters* user_params)
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{
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wait_for_gui_server();
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if (!validate_read_typed(user_params))
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return -EFAULT;
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auto params = *user_params;
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Rect rect = params.rect;
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if (rect.is_empty())
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return -EINVAL;
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ProcessPagingScope scope(EventLoop::main().server_process());
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int window_id = make_window_id();
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if (!window_id)
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return -ENOMEM;
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auto window = make<Window>(*this, window_id);
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if (!window)
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return -ENOMEM;
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window->setTitle(params.title);
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window->setRect(rect);
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m_windows.set(window_id, move(window));
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dbgprintf("%s<%u> gui$create_window: %d with rect {%d,%d %dx%d}\n", name().characters(), pid(), window_id, rect.x(), rect.y(), rect.width(), rect.height());
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return window_id;
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}
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int Process::gui$destroy_window(int window_id)
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{
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dbgprintf("%s<%u> gui$destroy_window (window_id=%d)\n", name().characters(), pid(), window_id);
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if (window_id < 0)
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return -EINVAL;
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if (window_id >= static_cast<int>(m_windows.size()))
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return -EBADWINDOW;
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auto it = m_windows.find(window_id);
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if (it == m_windows.end())
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return -EBADWINDOW;
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m_windows.remove(window_id);
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return 0;
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}
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