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#include <LibGUI/GTabWidget.h>
#include <LibGUI/GBoxLayout.h>
#include <LibGUI/GPainter.h>
#include <SharedGraphics/StylePainter.h>
GTabWidget::GTabWidget(GWidget* parent)
: GWidget(parent)
{
set_fill_with_background_color(true);
set_background_color(Color::LightGray);
}
GTabWidget::~GTabWidget()
{
}
void GTabWidget::add_widget(const String& title, GWidget* widget)
{
m_tabs.append({ title, widget });
add_child(*widget);
}
void GTabWidget::set_active_widget(GWidget* widget)
{
if (widget == m_active_widget)
return;
if (m_active_widget)
m_active_widget->set_visible(false);
m_active_widget = widget;
if (m_active_widget) {
m_active_widget->set_relative_rect(child_rect_for_size(size()));
m_active_widget->set_visible(true);
}
update_bar();
}
void GTabWidget::resize_event(GResizeEvent& event)
{
if (!m_active_widget)
return;
m_active_widget->set_relative_rect(child_rect_for_size(event.size()));
}
Rect GTabWidget::child_rect_for_size(const Size& size) const
{
return { { container_padding(), bar_height() + container_padding() }, { size.width() - container_padding() * 2, size.height() - bar_height() - container_padding() * 2 } };
}
void GTabWidget::child_event(CChildEvent& event)
{
if (!event.child() || !event.child()->is_widget())
return GWidget::child_event(event);
auto& child = static_cast<GWidget&>(*event.child());
if (event.type() == GEvent::ChildAdded) {
if (!m_active_widget)
set_active_widget(&child);
else if (m_active_widget != &child)
child.set_visible(false);
} else if (event.type() == GEvent::ChildRemoved) {
if (m_active_widget == &child) {
GWidget* new_active_widget = nullptr;
for (auto* new_child : children()) {
if (new_child->is_widget()) {
new_active_widget = static_cast<GWidget*>(new_child);
break;
}
}
set_active_widget(new_active_widget);
}
}
GWidget::child_event(event);
}
Rect GTabWidget::bar_rect() const
{
return { 0, 0, width(), bar_height() };
}
void GTabWidget::paint_event(GPaintEvent& event)
{
GPainter painter(*this);
painter.add_clip_rect(event.rect());
Rect container_rect { 0, bar_height(), width(), height() - bar_height() };
auto padding_rect = container_rect;
for (int i = 0; i < container_padding(); ++i) {
painter.draw_rect(padding_rect, background_color());
padding_rect.shrink(2, 2);
}
StylePainter::paint_frame(painter, container_rect, FrameShape::Container, FrameShadow::Raised, 2);
for (int i = 0; i < m_tabs.size(); ++i) {
if (m_tabs[i].widget == m_active_widget)
continue;
bool hovered = i == m_hovered_tab_index;
auto button_rect = this->button_rect(i);
StylePainter::paint_tab_button(painter, button_rect, false, hovered, m_tabs[i].widget->is_enabled());
painter.draw_text(button_rect.translated(0, 1), m_tabs[i].title, TextAlignment::Center);
}
for (int i = 0; i < m_tabs.size(); ++i) {
if (m_tabs[i].widget != m_active_widget)
continue;
bool hovered = i == m_hovered_tab_index;
auto button_rect = this->button_rect(i);
StylePainter::paint_tab_button(painter, button_rect, true, hovered, m_tabs[i].widget->is_enabled());
painter.draw_text(button_rect.translated(0, 1), m_tabs[i].title, TextAlignment::Center);
painter.draw_line(button_rect.bottom_left().translated(1, 1), button_rect.bottom_right().translated(-1, 1), background_color());
break;
}
}
Rect GTabWidget::button_rect(int index) const
{
int x_offset = 2;
for (int i = 0; i < index; ++i)
x_offset += m_tabs[i].width(font());
Rect rect { x_offset, 0, m_tabs[index].width(font()), bar_height() };
if (m_tabs[index].widget != m_active_widget) {
rect.move_by(0, 2);
rect.set_height(rect.height() - 2);
} else {
rect.move_by(-2, 0);
rect.set_width(rect.width() + 4);
}
return rect;
}
int GTabWidget::TabData::width(const Font& font) const
{
return 16 + font.width(title);
}
void GTabWidget::mousedown_event(GMouseEvent& event)
{
for (int i = 0; i < m_tabs.size(); ++i) {
auto button_rect = this->button_rect(i);
if (!button_rect.contains(event.position()))
continue;
set_active_widget(m_tabs[i].widget);
return;
}
}
void GTabWidget::mousemove_event(GMouseEvent& event)
{
int hovered_tab = -1;
for (int i = 0; i < m_tabs.size(); ++i) {
auto button_rect = this->button_rect(i);
if (!button_rect.contains(event.position()))
continue;
hovered_tab = i;
if (m_tabs[i].widget == m_active_widget)
break;
}
if (hovered_tab == m_hovered_tab_index)
return;
m_hovered_tab_index = hovered_tab;
update_bar();
}
void GTabWidget::leave_event(CEvent&)
{
if (m_hovered_tab_index != -1) {
m_hovered_tab_index = -1;
update_bar();
}
}
void GTabWidget::update_bar()
{
auto invalidation_rect = bar_rect();
invalidation_rect.set_height(invalidation_rect.height() + 1);
update(invalidation_rect);
}
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