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ladybird/Userland/Applications/PixelPaint/Tools/RectangleTool.cpp

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Mustafa Quraish <mustafa@serenityos.org>
* Copyright (c) 2022, MacDue <macdue@dueutil.tech>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "RectangleTool.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/TextBox.h>
#include <LibGUI/ValueSlider.h>
#include <LibGfx/AntiAliasingPainter.h>
#include <LibGfx/Rect.h>
namespace PixelPaint {
void RectangleTool::draw_using(GUI::Painter& painter, Gfx::IntPoint start_position, Gfx::IntPoint end_position, int thickness, int corner_radius)
{
Gfx::IntRect rect;
if (m_draw_mode == DrawMode::FromCenter) {
auto delta = end_position - start_position;
rect = Gfx::IntRect::from_two_points(start_position - delta, end_position);
} else {
rect = Gfx::IntRect::from_two_points(start_position, end_position);
}
switch (m_fill_mode) {
case FillMode::Fill:
painter.fill_rect(rect, m_editor->color_for(m_drawing_button));
break;
case FillMode::Outline:
painter.draw_rect_with_thickness(rect, m_editor->color_for(m_drawing_button), thickness);
break;
case FillMode::Gradient:
painter.fill_rect_with_gradient(rect, m_editor->primary_color(), m_editor->secondary_color());
break;
case FillMode::RoundedCorners: {
int min_dimension = corner_radius * 2;
if (rect.width() < min_dimension)
rect.set_width(min_dimension);
if (rect.height() < min_dimension)
rect.set_height(min_dimension);
if (m_antialias_enabled) {
Gfx::AntiAliasingPainter aa_painter { painter };
aa_painter.fill_rect_with_rounded_corners(rect, m_editor->color_for(m_drawing_button), corner_radius);
} else {
painter.fill_rect_with_rounded_corners(rect, m_editor->color_for(m_drawing_button), corner_radius);
}
break;
}
default:
VERIFY_NOT_REACHED();
}
}
void RectangleTool::on_mousedown(Layer* layer, MouseEvent& event)
{
if (!layer)
return;
auto& layer_event = event.layer_event();
if (layer_event.button() != GUI::MouseButton::Primary && layer_event.button() != GUI::MouseButton::Secondary)
return;
if (m_drawing_button != GUI::MouseButton::None)
return;
m_drawing_button = layer_event.button();
m_rectangle_start_position = layer_event.position();
m_rectangle_end_position = layer_event.position();
m_editor->update();
}
void RectangleTool::on_mouseup(Layer* layer, MouseEvent& event)
{
if (!layer)
return;
if (event.layer_event().button() == m_drawing_button) {
GUI::Painter painter(layer->get_scratch_edited_bitmap());
draw_using(painter, m_rectangle_start_position, m_rectangle_end_position, m_thickness, m_corner_radius);
m_drawing_button = GUI::MouseButton::None;
auto modified_rect = Gfx::IntRect::from_two_points(m_rectangle_start_position, m_rectangle_end_position).inflated(m_thickness * 2, m_thickness * 2);
layer->did_modify_bitmap(modified_rect);
m_editor->update();
m_editor->did_complete_action(tool_name());
}
}
void RectangleTool::on_mousemove(Layer* layer, MouseEvent& event)
{
if (!layer)
return;
if (m_drawing_button == GUI::MouseButton::None)
return;
m_draw_mode = event.layer_event().alt() ? DrawMode::FromCenter : DrawMode::FromCorner;
if (event.layer_event().shift())
m_rectangle_end_position = m_rectangle_start_position.end_point_for_aspect_ratio(event.layer_event().position(), 1.0);
else if (m_aspect_ratio.has_value())
m_rectangle_end_position = m_rectangle_start_position.end_point_for_aspect_ratio(event.layer_event().position(), m_aspect_ratio.value());
else
m_rectangle_end_position = event.layer_event().position();
m_editor->update();
}
void RectangleTool::on_second_paint(Layer const* layer, GUI::PaintEvent& event)
{
if (!layer || m_drawing_button == GUI::MouseButton::None)
return;
GUI::Painter painter(*m_editor);
painter.add_clip_rect(event.rect());
painter.translate(editor_layer_location(*layer));
auto start_position = editor_stroke_position(m_rectangle_start_position, m_thickness);
auto end_position = editor_stroke_position(m_rectangle_end_position, m_thickness);
draw_using(painter, start_position, end_position, AK::max(m_thickness * m_editor->scale(), 1), m_corner_radius * m_editor->scale());
}
bool RectangleTool::on_keydown(GUI::KeyEvent& event)
{
if (event.key() == Key_Escape && m_drawing_button != GUI::MouseButton::None) {
m_drawing_button = GUI::MouseButton::None;
m_editor->update();
return true;
}
return Tool::on_keydown(event);
}
ErrorOr<GUI::Widget*> RectangleTool::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 thickness_or_radius_container = TRY(properties_widget->try_add<GUI::Widget>());
thickness_or_radius_container->set_fixed_height(20);
(void)TRY(thickness_or_radius_container->try_set_layout<GUI::HorizontalBoxLayout>());
auto thickness_or_radius_label = TRY(thickness_or_radius_container->try_add<GUI::Label>());
thickness_or_radius_label->set_text_alignment(Gfx::TextAlignment::CenterLeft);
thickness_or_radius_label->set_fixed_size(80, 20);
auto thickness_or_radius_slider = TRY(thickness_or_radius_container->try_add<GUI::ValueSlider>(Orientation::Horizontal, "px"_short_string));
thickness_or_radius_slider->on_change = [&](int value) {
if (m_fill_mode == FillMode::RoundedCorners) {
m_corner_radius = value;
} else
m_thickness = value;
};
auto update_slider = [this, thickness_or_radius_label, thickness_or_radius_slider] {
auto update_values = [&](auto label, int value, int range_min, int range_max = 10) {
thickness_or_radius_label->set_text(label);
thickness_or_radius_slider->set_range(range_min, range_max);
thickness_or_radius_slider->set_value(value);
};
if (m_fill_mode == FillMode::RoundedCorners)
update_values("Radius:", m_corner_radius, 0, 50);
else
update_values("Thickness:", m_thickness, 1);
};
update_slider();
set_primary_slider(thickness_or_radius_slider);
auto mode_container = TRY(properties_widget->try_add<GUI::Widget>());
mode_container->set_fixed_height(90);
(void)TRY(mode_container->try_set_layout<GUI::HorizontalBoxLayout>());
auto mode_label = TRY(mode_container->try_add<GUI::Label>("Mode:"));
mode_label->set_text_alignment(Gfx::TextAlignment::CenterLeft);
mode_label->set_fixed_size(30, 20);
auto mode_radio_container = TRY(mode_container->try_add<GUI::Widget>());
(void)TRY(mode_radio_container->try_set_layout<GUI::VerticalBoxLayout>());
auto outline_mode_radio = TRY(mode_radio_container->try_add<GUI::RadioButton>("Outline"_short_string));
auto fill_mode_radio = TRY(mode_radio_container->try_add<GUI::RadioButton>("Fill"_short_string));
auto gradient_mode_radio = TRY(mode_radio_container->try_add<GUI::RadioButton>(TRY("Gradient"_string)));
mode_radio_container->set_fixed_width(70);
auto rounded_corners_mode_radio = TRY(mode_radio_container->try_add<GUI::RadioButton>("Rounded"_short_string));
outline_mode_radio->on_checked = [this, update_slider](bool) {
m_fill_mode = FillMode::Outline;
update_slider();
};
fill_mode_radio->on_checked = [this, update_slider](bool) {
m_fill_mode = FillMode::Fill;
update_slider();
};
gradient_mode_radio->on_checked = [this, update_slider](bool) {
m_fill_mode = FillMode::Gradient;
update_slider();
};
rounded_corners_mode_radio->on_checked = [this, update_slider](bool) {
m_fill_mode = FillMode::RoundedCorners;
update_slider();
};
outline_mode_radio->set_checked(true);
auto mode_extras_container = TRY(mode_container->try_add<GUI::Widget>());
(void)TRY(mode_extras_container->try_set_layout<GUI::VerticalBoxLayout>());
auto aa_enable_checkbox = TRY(mode_extras_container->try_add<GUI::CheckBox>(TRY("Anti-alias"_string)));
aa_enable_checkbox->on_checked = [this](bool checked) {
m_antialias_enabled = checked;
};
aa_enable_checkbox->set_checked(true);
auto aspect_container = TRY(mode_extras_container->try_add<GUI::Widget>());
(void)TRY(aspect_container->try_set_layout<GUI::VerticalBoxLayout>());
aspect_container->set_fixed_width(75);
auto aspect_label = TRY(aspect_container->try_add<GUI::Label>("Aspect Ratio:"));
aspect_label->set_text_alignment(Gfx::TextAlignment::CenterLeft);
aspect_label->set_fixed_size(75, 20);
auto aspect_fields_container = TRY(aspect_container->try_add<GUI::Widget>());
aspect_fields_container->set_fixed_width(75);
(void)TRY(aspect_fields_container->try_set_layout<GUI::HorizontalBoxLayout>());
m_aspect_w_textbox = TRY(aspect_fields_container->try_add<GUI::TextBox>());
m_aspect_w_textbox->set_fixed_height(20);
m_aspect_w_textbox->set_fixed_width(25);
m_aspect_w_textbox->on_change = [this] {
auto x = m_aspect_w_textbox->text().to_int().value_or(0);
auto y = m_aspect_h_textbox->text().to_int().value_or(0);
if (x > 0 && y > 0) {
m_aspect_ratio = (float)x / (float)y;
} else {
m_aspect_ratio = {};
}
};
auto multiply_label = TRY(aspect_fields_container->try_add<GUI::Label>("x"));
multiply_label->set_text_alignment(Gfx::TextAlignment::Center);
multiply_label->set_fixed_size(10, 20);
m_aspect_h_textbox = TRY(aspect_fields_container->try_add<GUI::TextBox>());
m_aspect_h_textbox->set_fixed_height(20);
m_aspect_h_textbox->set_fixed_width(25);
m_aspect_h_textbox->on_change = [this] { m_aspect_w_textbox->on_change(); };
m_properties_widget = properties_widget;
}
return m_properties_widget.ptr();
}
}
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