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LibGUI: Add a basic BreadcrumbBar widget! :^)

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This can be used to implement segmented path bars in FileManager and
wherever else wanted.
This commit is contained in:
Andreas Kling 2020-12-14 20:03:16 +01:00
parent b00a347ac5
commit 818f7777c8
3 changed files with 172 additions and 0 deletions
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107
Libraries/LibGUI/BreadcrumbBar.cpp Normal file
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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibGUI/BoxLayout.h>
#include <LibGUI/BreadcrumbBar.h>
#include <LibGUI/Button.h>
#include <LibGfx/Font.h>
namespace GUI {
// FIXME: Move this somewhere else
class UnuncheckableButton : public GUI::Button {
C_OBJECT(UnuncheckableButton);
public:
virtual ~UnuncheckableButton() override { }
virtual bool is_uncheckable() const override { return false; }
private:
UnuncheckableButton() { }
};
BreadcrumbBar::BreadcrumbBar()
{
auto& layout = set_layout<HorizontalBoxLayout>();
layout.set_spacing(0);
}
BreadcrumbBar::~BreadcrumbBar()
{
}
void BreadcrumbBar::clear_segments()
{
m_segments.clear();
// FIXME: Should Core::Object have something like "remove_all_children()" perhaps?
auto children = this->children();
for (auto& child : children)
child.remove_from_parent();
}
void BreadcrumbBar::append_segment(const String& text, const Gfx::Bitmap* icon, const String& data)
{
auto& button = add<UnuncheckableButton>();
button.set_button_style(Gfx::ButtonStyle::CoolBar);
button.set_text(text);
button.set_icon(icon);
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);
};
button.set_size_policy(SizePolicy::Fixed, SizePolicy::Fixed);
auto button_text_width = button.font().width(text);
auto icon_width = icon ? icon->width() : 0;
auto icon_padding = icon ? 4 : 0;
button.set_preferred_size(button_text_width + icon_width + icon_padding + 16, 16 + 8);
Segment segment { icon, text, data, button.make_weak_ptr<GUI::Button>() };
m_segments.append(move(segment));
}
void BreadcrumbBar::set_selected_segment(Optional<size_t> 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()];
ASSERT(segment.button);
segment.button->set_checked(true);
}
}