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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)
{
}
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_rect());
}
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 { { 0, bar_height() }, { size.width(), size.height() - bar_height() } };
}
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());
painter.fill_rect(bar_rect(), Color::MidGray);
for (int i = 0; i < m_tabs.size(); ++i) {
auto button_rect = this->button_rect(i);
StylePainter::paint_button(painter, button_rect, ButtonStyle::Normal, m_tabs[i].widget == m_active_widget);
painter.draw_text(button_rect, m_tabs[i].title, TextAlignment::Center);
}
}
Rect GTabWidget::button_rect(int index) const
{
int x_offset = 0;
for (int i = 0; i < index; ++i)
x_offset += m_tabs[i].width(font());
return { x_offset, 0, m_tabs[index].width(font()), bar_height() };
}
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);
}
}
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