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