ladybird/Userland/Libraries/LibGUI/Label.cpp

/*
 * Copyright (c) 2018-2020, 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/Label.h>
#include <LibGUI/Painter.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Font.h>
#include <LibGfx/Palette.h>

REGISTER_WIDGET(GUI, Label)

namespace GUI {

Label::Label(String text)
    : m_text(move(text))
{
    REGISTER_TEXT_ALIGNMENT_PROPERTY("text_alignment", text_alignment, set_text_alignment);

    set_frame_thickness(0);
    set_frame_shadow(Gfx::FrameShadow::Plain);
    set_frame_shape(Gfx::FrameShape::NoFrame);

    set_foreground_role(Gfx::ColorRole::WindowText);

    REGISTER_STRING_PROPERTY("text", text, set_text);
    REGISTER_BOOL_PROPERTY("autosize", is_autosize, set_autosize);
}

Label::~Label()
{
}

void Label::set_autosize(bool autosize)
{
    if (m_autosize == autosize)
        return;
    m_autosize = autosize;
    if (m_autosize)
        size_to_fit();
}

void Label::set_icon(const Gfx::Bitmap* icon)
{
    if (m_icon == icon)
        return;
    m_icon = icon;
    update();
}

void Label::set_text(String text)
{
    if (text == m_text)
        return;
    m_text = move(text);
    if (m_autosize)
        size_to_fit();
    update();
    did_change_text();
}

Gfx::IntRect Label::text_rect() const
{
    int indent = 0;
    if (frame_thickness() > 0)
        indent = font().glyph_width('x') / 2;
    auto rect = frame_inner_rect();
    rect.move_by(indent, 0);
    rect.set_width(rect.width() - indent * 2);
    return rect;
}

void Label::paint_event(PaintEvent& event)
{
    Frame::paint_event(event);

    Painter painter(*this);
    painter.add_clip_rect(event.rect());

    if (m_icon) {
        if (m_should_stretch_icon) {
            painter.draw_scaled_bitmap(frame_inner_rect(), *m_icon, m_icon->rect());
        } else {
            auto icon_location = frame_inner_rect().center().translated(-(m_icon->width() / 2), -(m_icon->height() / 2));
            painter.blit(icon_location, *m_icon, m_icon->rect());
        }
    }
    if (text().is_empty())
        return;
    auto text_rect = this->text_rect();

    if (is_enabled()) {
        painter.draw_text(text_rect, text(), m_text_alignment, palette().color(foreground_role()), Gfx::TextElision::Right);
    } else {
        painter.draw_text(text_rect.translated(1, 1), text(), font(), text_alignment(), Color::White, Gfx::TextElision::Right);
        painter.draw_text(text_rect, text(), font(), text_alignment(), Color::from_rgb(0x808080), Gfx::TextElision::Right);
    }
}

void Label::size_to_fit()
{
    set_fixed_width(font().width(m_text));
}

}