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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Mustafa Quraish <mustafa@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "EraseTool.h"
#include "../ImageEditor.h"
#include "../Layer.h"
#include <LibGUI/Action.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/CheckBox.h>
#include <LibGUI/Label.h>
#include <LibGUI/Menu.h>
#include <LibGUI/Painter.h>
#include <LibGUI/RadioButton.h>
#include <LibGUI/ValueSlider.h>
#include <LibGfx/Bitmap.h>
namespace PixelPaint {
Color EraseTool::color_for(GUI::MouseEvent const&)
{
if (m_use_secondary_color)
return m_editor->secondary_color();
return Color(255, 255, 255, 0);
}
void EraseTool::draw_point(Gfx::Bitmap& bitmap, Gfx::Color color, Gfx::IntPoint point)
{
if (m_draw_mode == DrawMode::Pencil) {
int radius = size() / 2;
Gfx::IntRect rect { point.x() - radius, point.y() - radius, size(), size() };
GUI::Painter painter(bitmap);
painter.clear_rect(rect, color);
} else {
for (int y = point.y() - size(); y < point.y() + size(); y++) {
for (int x = point.x() - size(); x < point.x() + size(); x++) {
auto distance = point.distance_from({ x, y });
if (x < 0 || x >= bitmap.width() || y < 0 || y >= bitmap.height())
continue;
if (distance >= size())
continue;
auto old_color = bitmap.get_pixel(x, y);
auto falloff = get_falloff(distance);
auto new_color = old_color.interpolate(color, falloff);
bitmap.set_pixel(x, y, new_color);
}
}
}
}
ErrorOr<GUI::Widget*> EraseTool::get_properties_widget()
{
if (!m_properties_widget) {
auto properties_widget = TRY(GUI::Widget::try_create());
(void)TRY(properties_widget->try_set_layout<GUI::VerticalBoxLayout>());
auto size_container = TRY(properties_widget->try_add<GUI::Widget>());
size_container->set_fixed_height(20);
(void)TRY(size_container->try_set_layout<GUI::HorizontalBoxLayout>());
auto size_label = TRY(size_container->try_add<GUI::Label>("Size:"_short_string));
size_label->set_text_alignment(Gfx::TextAlignment::CenterLeft);
size_label->set_fixed_size(80, 20);
auto size_slider = TRY(size_container->try_add<GUI::ValueSlider>(Orientation::Horizontal, "px"_short_string));
size_slider->set_range(1, 100);
size_slider->set_value(size());
size_slider->on_change = [this, size_slider](int value) {
set_size(value);
size_slider->set_override_cursor(cursor());
};
set_primary_slider(size_slider);
auto hardness_container = TRY(properties_widget->try_add<GUI::Widget>());
hardness_container->set_fixed_height(20);
(void)TRY(hardness_container->try_set_layout<GUI::HorizontalBoxLayout>());
auto hardness_label = TRY(hardness_container->try_add<GUI::Label>(TRY("Hardness:"_string)));
hardness_label->set_text_alignment(Gfx::TextAlignment::CenterLeft);
hardness_label->set_fixed_size(80, 20);
auto hardness_slider = TRY(hardness_container->try_add<GUI::ValueSlider>(Orientation::Horizontal, "%"_short_string));
hardness_slider->set_range(1, 100);
hardness_slider->set_value(hardness());
hardness_slider->on_change = [this](int value) {
set_hardness(value);
};
set_secondary_slider(hardness_slider);
auto secondary_color_container = TRY(properties_widget->try_add<GUI::Widget>());
secondary_color_container->set_fixed_height(20);
(void)TRY(secondary_color_container->try_set_layout<GUI::HorizontalBoxLayout>());
auto use_secondary_color_checkbox = TRY(secondary_color_container->try_add<GUI::CheckBox>());
use_secondary_color_checkbox->set_checked(m_use_secondary_color);
use_secondary_color_checkbox->set_text(TRY("Use secondary color"_string));
use_secondary_color_checkbox->on_checked = [this](bool checked) {
m_use_secondary_color = checked;
};
auto mode_container = TRY(properties_widget->try_add<GUI::Widget>());
mode_container->set_fixed_height(46);
(void)TRY(mode_container->try_set_layout<GUI::HorizontalBoxLayout>());
auto mode_label = TRY(mode_container->try_add<GUI::Label>(TRY("Draw Mode:"_string)));
mode_label->set_text_alignment(Gfx::TextAlignment::CenterLeft);
mode_label->set_fixed_size(80, 20);
auto mode_radio_container = TRY(mode_container->try_add<GUI::Widget>());
(void)TRY(mode_radio_container->try_set_layout<GUI::VerticalBoxLayout>());
auto pencil_mode_radio = TRY(mode_radio_container->try_add<GUI::RadioButton>("Pencil"_short_string));
auto brush_mode_radio = TRY(mode_radio_container->try_add<GUI::RadioButton>("Brush"_short_string));
pencil_mode_radio->on_checked = [this, hardness_slider, size_slider](bool) {
m_draw_mode = DrawMode::Pencil;
hardness_slider->set_enabled(false);
refresh_editor_cursor();
size_slider->set_override_cursor(cursor());
};
brush_mode_radio->on_checked = [this, hardness_slider, size_slider](bool) {
m_draw_mode = DrawMode::Brush;
hardness_slider->set_enabled(true);
refresh_editor_cursor();
size_slider->set_override_cursor(cursor());
};
pencil_mode_radio->set_checked(true);
m_properties_widget = properties_widget;
}
return m_properties_widget.ptr();
}
NonnullRefPtr<Gfx::Bitmap> EraseTool::build_cursor()
{
if (m_draw_mode == DrawMode::Brush)
return BrushTool::build_cursor();
m_scale_last_created_cursor = m_editor ? m_editor->scale() : 1;
int scaled_size = size() * m_scale_last_created_cursor;
NonnullRefPtr<Gfx::Bitmap> new_cursor = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, Gfx::IntSize(scaled_size, scaled_size)).release_value_but_fixme_should_propagate_errors();
Gfx::IntRect rect { 0, 0, scaled_size, scaled_size };
Gfx::Painter painter { new_cursor };
painter.draw_rect(rect, Color::LightGray);
painter.draw_line({ scaled_size / 2 - 5, scaled_size / 2 }, { scaled_size / 2 + 5, scaled_size / 2 }, Color::LightGray, 3);
painter.draw_line({ scaled_size / 2, scaled_size / 2 - 5 }, { scaled_size / 2, scaled_size / 2 + 5 }, Color::LightGray, 3);
painter.draw_line({ scaled_size / 2 - 5, scaled_size / 2 }, { scaled_size / 2 + 5, scaled_size / 2 }, Color::MidGray, 1);
painter.draw_line({ scaled_size / 2, scaled_size / 2 - 5 }, { scaled_size / 2, scaled_size / 2 + 5 }, Color::MidGray, 1);
return new_cursor;
}
}
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