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

/*
 * Copyright (c) 2021-2023, the SerenityOS developers.
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include "ZoomTool.h"
#include "../ImageEditor.h"
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Label.h>
#include <LibGUI/ValueSlider.h>

namespace PixelPaint {

void ZoomTool::on_mousedown(Layer*, MouseEvent& event)
{
    auto& raw_event = event.raw_event();
    if (raw_event.button() != GUI::MouseButton::Primary && raw_event.button() != GUI::MouseButton::Secondary)
        return;

    auto scale_factor = (raw_event.button() == GUI::MouseButton::Primary) ? m_sensitivity : -m_sensitivity;
    auto new_scale = m_editor->scale() * AK::exp2(scale_factor);
    m_editor->scale_centered(new_scale, raw_event.position());
}

ErrorOr<GUI::Widget*> ZoomTool::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 sensitivity_container = TRY(properties_widget->try_add<GUI::Widget>());
        sensitivity_container->set_fixed_height(20);
        (void)TRY(sensitivity_container->try_set_layout<GUI::HorizontalBoxLayout>());

        auto sensitivity_label = TRY(sensitivity_container->try_add<GUI::Label>("Sensitivity:"));
        sensitivity_label->set_text_alignment(Gfx::TextAlignment::CenterLeft);
        sensitivity_label->set_fixed_size(80, 20);

        auto sensitivity_slider = TRY(sensitivity_container->try_add<GUI::ValueSlider>(Orientation::Horizontal, String::from_utf8_short_string("%"sv)));
        sensitivity_slider->set_range(1, 100);
        sensitivity_slider->set_value(100 * m_sensitivity);

        sensitivity_slider->on_change = [this](int value) {
            m_sensitivity = value / 100.0f;
        };
        set_primary_slider(sensitivity_slider);
        m_properties_widget = properties_widget;
    }

    return m_properties_widget.ptr();
}

}