cb295ab644
This patch moves the magnifier rect computation over to the server side to ensure that the mouse cursor position and the screen image never get out of sync.
53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
/*
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* Copyright (c) 2021, Valtteri Koskivuori <vkoskiv@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "MagnifierWidget.h"
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#include <LibGUI/DisplayLink.h>
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#include <LibGUI/Painter.h>
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#include <LibGUI/Window.h>
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#include <LibGUI/WindowServerConnection.h>
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#include <LibGfx/Rect.h>
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MagnifierWidget::MagnifierWidget()
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{
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GUI::DisplayLink::register_callback([this](auto) { sync(); });
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}
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MagnifierWidget::~MagnifierWidget()
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{
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}
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void MagnifierWidget::track_cursor_globally()
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{
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VERIFY(window());
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auto window_id = window()->window_id();
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VERIFY(window_id >= 0);
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set_global_cursor_tracking(true);
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GUI::WindowServerConnection::the().set_global_cursor_tracking(window_id, true);
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}
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void MagnifierWidget::set_scale_factor(int scale_factor)
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{
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VERIFY(scale_factor == 2 || scale_factor == 4);
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m_scale_factor = scale_factor;
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update();
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}
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void MagnifierWidget::sync()
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{
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Gfx::IntSize grab_size { size().width() / m_scale_factor, size().height() / m_scale_factor };
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m_grabbed_bitmap = GUI::WindowServerConnection::the().get_screen_bitmap_around_cursor(grab_size).bitmap();
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update();
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}
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void MagnifierWidget::paint_event(GUI::PaintEvent&)
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{
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GUI::Painter painter(*this);
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if (m_grabbed_bitmap)
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painter.draw_scaled_bitmap(rect(), *m_grabbed_bitmap, m_grabbed_bitmap->rect());
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}
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