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Magnifier: Add option to display grid over the image

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This commit is contained in:
FrHun 2022-12-04 21:25:34 +01:00 • committed by Sam Atkins
parent df30440117
commit 2b635b5330
3 changed files with 45 additions and 1 deletions
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37
Userland/Applications/Magnifier/MagnifierWidget.cpp
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@ -32,6 +32,14 @@ void MagnifierWidget::lock_location(bool lock)
m_locked_location = {};
}
void MagnifierWidget::show_grid(bool new_value)
{
if (m_show_grid == new_value)
return;
m_show_grid = new_value;
update();
}
void MagnifierWidget::set_color_filter(OwnPtr<Gfx::ColorBlindnessFilter> color_filter)
{
m_color_filter = move(color_filter);
@ -75,10 +83,37 @@ void MagnifierWidget::paint_event(GUI::PaintEvent& event)
{
GUI::Frame::paint_event(event);
if (!m_grabbed_bitmap)
return;
GUI::Painter painter(*this);
if (m_grabbed_bitmap)
painter.draw_scaled_bitmap(frame_inner_rect(), *m_grabbed_bitmap, m_grabbed_bitmap->rect());
painter.draw_scaled_bitmap(frame_inner_rect(), *m_grabbed_bitmap, m_grabbed_bitmap->rect(), 1.0, Gfx::Painter::ScalingMode::NearestFractional);
if (m_show_grid) {
auto line_color = Color(Color::NamedColor::Magenta);
line_color.set_alpha(100);
auto grid_rect = frame_inner_rect();
if (m_grabbed_bitmap)
grid_rect = frame_inner_rect().intersected({ 0,
0,
m_grabbed_bitmap->rect().width() * m_scale_factor,
m_grabbed_bitmap->rect().height() * m_scale_factor });
int start_y = grid_rect.top(),
start_x = grid_rect.left();
int end_y = grid_rect.bottom(),
end_x = grid_rect.right();
for (int current_y = start_y; current_y <= end_y; current_y += m_scale_factor)
painter.draw_line({ start_x, current_y }, { end_x, current_y }, line_color);
for (int current_x = start_y; current_x <= end_x; current_x += m_scale_factor)
painter.draw_line({ current_x, start_y }, { current_x, end_y }, line_color);
}
}
void MagnifierWidget::second_paint_event(GUI::PaintEvent&)