401ea85655
This adds an option for even more magnification, when you really need to count pixels, as well as pausing the capture by pressing Space and switching between magnification levels with keys 2, 4 & 8.
49 lines
1.2 KiB
C++
49 lines
1.2 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::set_scale_factor(int scale_factor)
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{
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VERIFY(scale_factor == 2 || scale_factor == 4 || scale_factor == 8);
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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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if (m_pause_capture)
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return;
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auto size = frame_inner_rect().size();
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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& event)
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{
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GUI::Frame::paint_event(event);
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GUI::Painter painter(*this);
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if (m_grabbed_bitmap)
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painter.draw_scaled_bitmap(frame_inner_rect(), *m_grabbed_bitmap, m_grabbed_bitmap->rect());
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}
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