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/*
* Copyright (c) 2021, Marcus Nilsson <brainbomb@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Painter.h>
#include <LibGUI/TextBox.h>
#include <LibGUI/ValueSlider.h>
#include <LibGfx/FontDatabase.h>
#include <LibGfx/Palette.h>
#include <LibGfx/StylePainter.h>
REGISTER_WIDGET(GUI, ValueSlider)
namespace GUI {
ValueSlider::ValueSlider(Gfx::Orientation orientation, String suffix)
: AbstractSlider(orientation)
, m_suffix(move(suffix))
{
//FIXME: Implement vertical mode
VERIFY(orientation == Orientation::Horizontal);
set_fixed_height(20);
m_textbox = add<GUI::TextBox>();
m_textbox->set_relative_rect({ 0, 0, 34, 20 });
m_textbox->set_font_fixed_width(true);
m_textbox->set_font_size(8);
m_textbox->on_change = [&]() {
String value = m_textbox->text();
if (value.ends_with(m_suffix, AK::CaseSensitivity::CaseInsensitive))
value = value.substring_view(0, value.length() - m_suffix.length());
auto integer_value = value.to_int();
if (integer_value.has_value())
AbstractSlider::set_value(integer_value.value());
};
m_textbox->on_return_pressed = [&]() {
m_textbox->on_change();
m_textbox->set_text(formatted_value());
};
m_textbox->on_up_pressed = [&]() {
if (value() < max())
AbstractSlider::set_value(value() + 1);
m_textbox->set_text(formatted_value());
};
m_textbox->on_down_pressed = [&]() {
if (value() > min())
AbstractSlider::set_value(value() - 1);
m_textbox->set_text(formatted_value());
};
m_textbox->on_focusout = [&]() {
m_textbox->on_return_pressed();
};
m_textbox->on_escape_pressed = [&]() {
m_textbox->clear_selection();
m_textbox->set_text(formatted_value());
parent_widget()->set_focus(true);
};
}
ValueSlider::~ValueSlider()
{
}
String ValueSlider::formatted_value() const
{
return String::formatted("{:2}{}", value(), m_suffix);
}
void ValueSlider::paint_event(PaintEvent& event)
{
GUI::Painter painter(*this);
painter.add_clip_rect(event.rect());
painter.fill_rect_with_gradient(m_orientation, bar_rect(), palette().active_window_border1(), palette().active_window_border2());
auto unfilled_rect = bar_rect();
unfilled_rect.set_left(knob_rect().right());
painter.fill_rect(unfilled_rect, palette().base());
Gfx::StylePainter::paint_frame(painter, bar_rect(), palette(), Gfx::FrameShape::Container, Gfx::FrameShadow::Sunken, 2);
Gfx::StylePainter::paint_button(painter, knob_rect(), palette(), Gfx::ButtonStyle::Normal, false, m_hovered);
auto paint_knurl = [&](int x, int y) {
painter.set_pixel(x, y, palette().threed_shadow1());
painter.set_pixel(x + 1, y, palette().threed_shadow1());
painter.set_pixel(x, y + 1, palette().threed_shadow1());
painter.set_pixel(x + 1, y + 1, palette().threed_highlight());
};
auto knurl_rect = knob_rect().shrunken(4, 8);
if (m_knob_style == KnobStyle::Wide) {
for (int i = 0; i < 4; ++i) {
paint_knurl(knurl_rect.x(), knurl_rect.y() + (i * 3));
paint_knurl(knurl_rect.x() + 3, knurl_rect.y() + (i * 3));
paint_knurl(knurl_rect.x() + 6, knurl_rect.y() + (i * 3));
}
} else {
for (int i = 0; i < 4; ++i)
paint_knurl(knurl_rect.x(), knurl_rect.y() + (i * 3));
}
}
Gfx::IntRect ValueSlider::bar_rect() const
{
auto bar_rect = rect();
bar_rect.set_width(rect().width() - m_textbox->width());
bar_rect.set_x(m_textbox->width());
return bar_rect;
}
Gfx::IntRect ValueSlider::knob_rect() const
{
int knob_thickness = m_knob_style == KnobStyle::Wide ? 13 : 7;
Gfx::IntRect knob_rect = bar_rect();
knob_rect.set_width(knob_thickness);
int knob_offset = (int)((float)bar_rect().left() + (float)(value() - min()) / (float)(max() - min()) * (float)(bar_rect().width() - knob_thickness));
knob_rect.set_left(knob_offset);
knob_rect.center_vertically_within(bar_rect());
return knob_rect;
}
int ValueSlider::value_at(const Gfx::IntPoint& position) const
{
if (position.x() < bar_rect().left())
return min();
if (position.x() > bar_rect().right())
return max();
float relative_offset = (float)(position.x() - bar_rect().left()) / (float)bar_rect().width();
return (int)(relative_offset * (float)max());
}
void ValueSlider::set_value(int value)
{
AbstractSlider::set_value(value);
m_textbox->set_text(formatted_value());
}
void ValueSlider::leave_event(Core::Event&)
{
if (!m_hovered)
return;
m_hovered = false;
update(knob_rect());
}
void ValueSlider::mousewheel_event(MouseEvent& event)
{
if (event.wheel_delta() < 0)
set_value(value() + 1);
else
set_value(value() - 1);
}
void ValueSlider::mousemove_event(MouseEvent& event)
{
bool is_hovered = knob_rect().contains(event.position());
if (is_hovered != m_hovered) {
m_hovered = is_hovered;
update(knob_rect());
}
if (!m_dragging)
return;
set_value(value_at(event.position()));
}
void ValueSlider::mousedown_event(MouseEvent& event)
{
if (event.button() != MouseButton::Left)
return;
m_textbox->set_focus(true);
if (bar_rect().contains(event.position())) {
m_dragging = true;
set_value(value_at(event.position()));
}
}
void ValueSlider::mouseup_event(MouseEvent& event)
{
if (event.button() != MouseButton::Left)
return;
m_dragging = false;
}
}
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