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1aba8182a4
This eliminates the need to distinguish enum values in the body of the handler, easing the forwarding of the selected value. Issue #5008 Issue #5053
140 lines
3.1 KiB
C++
140 lines
3.1 KiB
C++
/*
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* \brief Widget types
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* \author Norman Feske
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* \date 2023-03-24
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*/
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/*
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* Copyright (C) 2023 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 _INCLUDE__DIALOG__WIDGETS_H_
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#define _INCLUDE__DIALOG__WIDGETS_H_
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#include <dialog/sub_scopes.h>
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namespace Dialog {
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template <typename> struct Select_button;
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struct Toggle_button;
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struct Action_button;
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struct Deferred_action_button;
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}
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struct Dialog::Toggle_button : Widget<Button>
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{
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template <typename FN>
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void view(Scope<Button> &s, bool selected, FN const &fn) const
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{
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bool const hovered = (s.hovered() && (!s.dragged() || selected));
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if (selected) s.attribute("selected", "yes");
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if (hovered) s.attribute("hovered", "yes");
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fn(s);
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}
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void view(Scope<Button> &s, bool selected) const
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{
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view(s, selected, [&] (Scope<Button> &s) {
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s.sub_scope<Dialog::Label>(s.id.value); });
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}
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template <typename FN>
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void click(Clicked_at const &, FN const &toggle_fn) { toggle_fn(); }
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};
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template <typename ENUM>
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struct Dialog::Select_button : Widget<Button>
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{
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ENUM const _value;
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Select_button(ENUM value) : _value(value) { }
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void view(Scope<Button> &s, ENUM selected_value) const
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{
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bool const selected = (selected_value == _value),
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hovered = (s.hovered() && !s.dragged() && !selected);
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if (selected) s.attribute("selected", "yes");
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if (hovered) s.attribute("hovered", "yes");
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s.sub_scope<Dialog::Label>(s.id.value);
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}
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template <typename FN>
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void click(Clicked_at const &, FN const &select_fn) { select_fn(_value); }
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};
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struct Dialog::Action_button : Widget<Button>
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{
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Event::Seq_number _seq_number { };
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template <typename FN>
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void view(Scope<Button> &s, FN const &fn) const
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{
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bool const selected = _seq_number == s.hover.seq_number,
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hovered = (s.hovered() && (!s.dragged() || selected));
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if (selected) s.attribute("selected", "yes");
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if (hovered) s.attribute("hovered", "yes");
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fn(s);
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}
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void view(Scope<Button> &s) const
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{
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view(s, [&] (Scope<Button> &s) { s.sub_scope<Label>(s.id.value); });
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}
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template <typename FN>
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void click(Clicked_at const &at, FN const &activate_fn)
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{
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_seq_number = at.seq_number;
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activate_fn();
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}
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};
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struct Dialog::Deferred_action_button : Widget<Button>
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{
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Event::Seq_number _seq_number { }; /* remembered at proposal time */
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template <typename FN>
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void view(Scope<Button> &s, FN const &fn) const
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{
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bool const selected = s.hovered() && s.dragged() && s.hover.matches(_seq_number),
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hovered = s.hovered() && (!s.dragged() || selected);
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if (selected) s.attribute("selected", "yes");
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if (hovered) s.attribute("hovered", "yes");
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fn(s);
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}
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void view(Scope<Button> &s) const
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{
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view(s, [&] (Scope<Button> &s) { s.sub_scope<Label>(s.id.value); });
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}
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void click(Clicked_at const &at)
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{
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_seq_number = at.seq_number;
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}
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template <typename FN>
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void clack(Clacked_at const &at, FN const &activate_fn)
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{
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if (at.matches(_seq_number))
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activate_fn();
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}
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};
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#endif /* _INCLUDE__DIALOG__WIDGETS_H_ */
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