4d01183f5c
This utility is useful for making sure those UI elements are pixel perfect. A simple 2x/4x magnification around the mouse cursor, shown in a window.
57 lines
1.4 KiB
C++
57 lines
1.4 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/Painter.h>
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#include <LibGUI/Window.h>
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#include <LibGUI/WindowServerConnection.h>
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#include <LibGfx/AffineTransform.h>
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#include <math.h>
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MagnifierWidget::MagnifierWidget()
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{
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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::timer_event(Core::TimerEvent&)
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{
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m_mouse_position = GUI::WindowServerConnection::the().get_global_cursor_position();
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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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int grab_frame_size = 200;
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grab_frame_size /= m_scale_factor;
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// Paint our screenshot
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Gfx::Rect region { m_mouse_position.x() - (grab_frame_size / 2), m_mouse_position.y() - (grab_frame_size / 2), grab_frame_size, grab_frame_size };
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auto map = GUI::WindowServerConnection::the().get_screen_bitmap(region);
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painter.draw_scaled_bitmap(rect(), *map.bitmap(), map.bitmap()->rect());
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}
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