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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGUI/Layout.h>
#include <LibGUI/ScrollableContainerWidget.h>
REGISTER_WIDGET(GUI, ScrollableContainerWidget)
namespace GUI {
ScrollableContainerWidget::ScrollableContainerWidget()
{
REGISTER_BOOL_PROPERTY("scrollbars_enabled", is_scrollbars_enabled, set_scrollbars_enabled);
REGISTER_BOOL_PROPERTY("should_hide_unnecessary_scrollbars", should_hide_unnecessary_scrollbars, set_should_hide_unnecessary_scrollbars);
}
ScrollableContainerWidget::~ScrollableContainerWidget()
{
}
void ScrollableContainerWidget::did_scroll()
{
AbstractScrollableWidget::did_scroll();
update_widget_position();
}
void ScrollableContainerWidget::update_widget_position()
{
if (!m_widget)
return;
m_widget->move_to(-horizontal_scrollbar().value() + content_margins().left(), -vertical_scrollbar().value() + content_margins().top());
}
void ScrollableContainerWidget::update_widget_size()
{
if (!m_widget)
return;
m_widget->do_layout();
if (m_widget->is_shrink_to_fit() && m_widget->layout()) {
auto new_size = Widget::content_size();
auto preferred_size = m_widget->layout()->preferred_size();
if (preferred_size.width() != -1)
new_size.set_width(preferred_size.width());
if (preferred_size.height() != -1)
new_size.set_height(preferred_size.height());
m_widget->resize(new_size);
set_content_size(new_size);
} else {
auto inner_size = Widget::content_size();
auto min_size = m_widget->min_size();
auto new_size = Gfx::Size {
max(inner_size.width(), min_size.width()),
max(inner_size.height(), min_size.height())
};
m_widget->resize(new_size);
set_content_size(new_size);
}
}
void ScrollableContainerWidget::resize_event(GUI::ResizeEvent& event)
{
AbstractScrollableWidget::resize_event(event);
update_widget_position();
update_widget_size();
}
void ScrollableContainerWidget::set_widget(GUI::Widget* widget)
{
if (m_widget == widget)
return;
if (m_widget)
remove_child(*m_widget);
m_widget = widget;
if (m_widget) {
add_child(*m_widget);
m_widget->move_to_back();
}
update_widget_size();
update_widget_position();
}
bool ScrollableContainerWidget::load_from_json(const JsonObject& json, RefPtr<Core::Object> (*unregistered_child_handler)(const String&))
{
json.for_each_member([&](auto& key, auto& value) {
set_property(key, value);
});
auto layout_value = json.get("layout");
if (!layout_value.is_null()) {
dbgln("Layout specified in ScrollableContainerWidget, this is not supported.");
return false;
}
auto content_widget_value = json.get("content_widget");
if (!content_widget_value.is_null() && !content_widget_value.is_object()) {
dbgln("content widget is not an object");
return false;
}
if (!json.get("children").is_null()) {
dbgln("children specified for ScrollableContainerWidget, but only 1 widget as content_widget is supported");
return false;
}
if (content_widget_value.is_object()) {
auto& content_widget = content_widget_value.as_object();
auto class_name = content_widget.get("class");
if (!class_name.is_string()) {
dbgln("Invalid content widget class name");
return false;
}
RefPtr<Core::Object> child;
if (auto* registration = Core::ObjectClassRegistration::find(class_name.as_string())) {
child = registration->construct();
} else {
child = unregistered_child_handler(class_name.as_string());
}
if (!child)
return false;
auto widget_ptr = verify_cast<GUI::Widget>(child.ptr());
set_widget(widget_ptr);
child->load_from_json(content_widget, unregistered_child_handler);
return true;
}
return true;
}
}
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