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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Breadcrumbbar.h>
#include <LibGUI/Button.h>
#include <LibGUI/Painter.h>
#include <LibGfx/Font/Font.h>
#include <LibGfx/Palette.h>
REGISTER_WIDGET(GUI, Breadcrumbbar)
namespace GUI {
class BreadcrumbButton : public Button {
C_OBJECT(BreadcrumbButton);
public:
virtual ~BreadcrumbButton() override = default;
virtual bool is_uncheckable() const override { return false; }
virtual void drop_event(DropEvent& event) override
{
if (on_drop)
on_drop(event);
}
virtual void drag_enter_event(DragEvent& event) override
{
update();
if (on_drag_enter)
on_drag_enter(event);
}
virtual void drag_leave_event(Event&) override
{
update();
}
virtual void paint_event(PaintEvent& event) override
{
Button::paint_event(event);
if (has_pending_drop()) {
Painter painter(*this);
painter.draw_rect(rect(), palette().selection(), true);
}
}
Function<void(DropEvent&)> on_drop;
Function<void(DragEvent&)> on_drag_enter;
private:
BreadcrumbButton() = default;
};
Breadcrumbbar::Breadcrumbbar()
{
auto& layout = set_layout<HorizontalBoxLayout>();
layout.set_spacing(0);
}
void Breadcrumbbar::clear_segments()
{
m_segments.clear();
remove_all_children();
m_selected_segment = {};
}
void Breadcrumbbar::append_segment(DeprecatedString text, Gfx::Bitmap const* icon, DeprecatedString data, DeprecatedString tooltip)
{
auto& button = add<BreadcrumbButton>();
button.set_button_style(Gfx::ButtonStyle::Coolbar);
button.set_text_deprecated(text);
button.set_icon(icon);
button.set_tooltip(move(tooltip));
button.set_focus_policy(FocusPolicy::TabFocus);
button.set_checkable(true);
button.set_exclusive(true);
button.on_click = [this, index = m_segments.size()](auto) {
if (on_segment_click)
on_segment_click(index);
if (on_segment_change && m_selected_segment != index)
on_segment_change(index);
};
button.on_focus_change = [this, index = m_segments.size()](auto has_focus, auto) {
if (has_focus && on_segment_change && m_selected_segment != index)
on_segment_change(index);
};
button.on_drop = [this, index = m_segments.size()](auto& drop_event) {
if (on_segment_drop)
on_segment_drop(index, drop_event);
};
button.on_drag_enter = [this, index = m_segments.size()](auto& event) {
if (on_segment_drag_enter)
on_segment_drag_enter(index, event);
};
m_segments.append(Segment {
.icon = icon,
.text = move(text),
.data = move(data),
.width = 0,
.shrunken_width = 0,
.button = button.make_weak_ptr<GUI::Button>(),
});
relayout();
}
void Breadcrumbbar::remove_end_segments(size_t start_segment_index)
{
while (segment_count() > start_segment_index) {
auto segment = m_segments.take_last();
remove_child(*segment.button);
}
if (m_selected_segment.has_value() && *m_selected_segment >= start_segment_index)
m_selected_segment = {};
}
Optional<size_t> Breadcrumbbar::find_segment_with_data(DeprecatedString const& data)
{
for (size_t i = 0; i < segment_count(); ++i) {
if (segment_data(i) == data)
return i;
}
return {};
}
void Breadcrumbbar::set_selected_segment(Optional<size_t> index)
{
if (m_selected_segment == index)
return;
m_selected_segment = index;
if (!index.has_value()) {
for_each_child_of_type<GUI::AbstractButton>([&](auto& button) {
button.set_checked(false);
return IterationDecision::Continue;
});
return;
}
auto& segment = m_segments[index.value()];
VERIFY(segment.button);
segment.button->set_checked(true);
if (on_segment_change)
on_segment_change(index);
relayout();
}
void Breadcrumbbar::doubleclick_event(MouseEvent& event)
{
if (on_doubleclick)
on_doubleclick(event);
}
void Breadcrumbbar::resize_event(ResizeEvent&)
{
relayout();
}
void Breadcrumbbar::did_change_font()
{
Widget::did_change_font();
relayout();
}
void Breadcrumbbar::relayout()
{
auto total_width = 0;
for (auto& segment : m_segments) {
VERIFY(segment.button);
auto& button = *segment.button;
// NOTE: We use our own font instead of the button's font here in case we're being notified about
// a system font change, and the button hasn't been notified yet.
auto button_text_width = font().width(segment.text);
auto icon_width = button.icon() ? button.icon()->width() : 0;
auto icon_padding = button.icon() ? 4 : 0;
int const max_button_width = 100;
segment.width = static_cast<int>(ceilf(min(button_text_width + icon_width + icon_padding + 16, max_button_width)));
segment.shrunken_width = icon_width + icon_padding + (button.icon() ? 4 : 16);
button.set_max_size(segment.width, 16 + 8);
button.set_min_size(segment.shrunken_width, 16 + 8);
total_width += segment.width;
}
auto remaining_width = total_width;
for (auto& segment : m_segments) {
if (remaining_width > width() && !segment.button->is_checked()) {
segment.button->set_preferred_width(segment.shrunken_width);
remaining_width -= (segment.width - segment.shrunken_width);
continue;
}
segment.button->set_preferred_width(segment.width);
}
}
}
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