91 lines
2.2 KiB
C++
91 lines
2.2 KiB
C++
/*
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* \brief Widget that hosts a child widget in a visual frame
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* \author Norman Feske
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* \date 2009-09-11
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*/
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/*
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* Copyright (C) 2014-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _FRAME_WIDGET_H_
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#define _FRAME_WIDGET_H_
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/* local includes */
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#include "widget.h"
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namespace Menu_view { struct Frame_widget; }
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struct Menu_view::Frame_widget : Widget
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{
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Texture<Pixel_rgb888> const * texture = nullptr;
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Padding padding { 2, 2, 2, 2 };
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Area _space() const
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{
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return Area(margin.horizontal() + padding.horizontal(),
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margin.vertical() + padding.vertical());
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}
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Frame_widget(Widget_factory &factory, Xml_node node, Unique_id unique_id)
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:
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Widget(factory, node, unique_id)
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{
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margin = { 4, 4, 4, 4 };
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}
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void update(Xml_node node) override
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{
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texture = _factory.styles.texture(node, "background");
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_update_child(node);
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/*
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* layout
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*/
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if (Widget *child = _children.first())
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child->geometry = Rect(Point(margin.left + padding.left,
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margin.top + padding.top),
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child->min_size());
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}
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Area min_size() const override
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{
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/* determine minimum child size */
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Widget const * const child = _children.first();
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Area const child_min_size = child ? child->min_size() : Area(0, 0);
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/* don't get smaller than the background texture */
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Area const texture_size = texture ? texture->size() : Area(0, 0);
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return Area(max(_space().w() + child_min_size.w(), texture_size.w()),
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max(_space().h() + child_min_size.h(), texture_size.h()));
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}
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void draw(Surface<Pixel_rgb888> &pixel_surface,
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Surface<Pixel_alpha8> &alpha_surface,
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Point at) const
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{
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Icon_painter::paint(pixel_surface, Rect(at, geometry.area()),
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*texture, 255);
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Icon_painter::paint(alpha_surface, Rect(at, geometry.area()),
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*texture, 255);
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_draw_children(pixel_surface, alpha_surface, at);
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}
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void _layout() override
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{
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if (Widget *child = _children.first())
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child->size(Area(geometry.w() - _space().w(),
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geometry.h() - _space().h()));
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}
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};
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#endif /* _FRAME_WIDGET_H_ */
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