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https://github.com/LadybirdBrowser/ladybird.git
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116cf92156
This fits nicer with FloatRect,FloatPoint,FloatSize and gives a much better visual clue about what type of metric is being used.
76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "GraphWidget.h"
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#include <LibGUI/Painter.h>
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#include <LibGfx/Font.h>
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GraphWidget::GraphWidget()
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{
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}
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GraphWidget::~GraphWidget()
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{
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}
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void GraphWidget::add_value(int value)
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{
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m_values.enqueue(value);
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update();
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}
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void GraphWidget::paint_event(GUI::PaintEvent& event)
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{
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GUI::Frame::paint_event(event);
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GUI::Painter painter(*this);
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painter.add_clip_rect(event.rect());
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painter.add_clip_rect(frame_inner_rect());
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painter.fill_rect(event.rect(), Color::Black);
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auto inner_rect = frame_inner_rect();
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float scale = (float)inner_rect.height() / (float)m_max;
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Gfx::IntPoint prev_point;
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for (size_t i = 0; i < m_values.size(); ++i) {
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int x = inner_rect.right() - (i * 2) + 1;
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if (x < 0)
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break;
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float scaled_value = (float)m_values.at(m_values.size() - i - 1) * scale;
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Gfx::IntPoint point = { x, inner_rect.bottom() - (int)scaled_value };
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if (i != 0)
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painter.draw_line(prev_point, point, m_graph_color);
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prev_point = point;
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}
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if (!m_values.is_empty() && text_formatter) {
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Gfx::IntRect text_rect = inner_rect.shrunken(8, 8);
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text_rect.set_height(font().glyph_height());
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auto text = text_formatter(m_values.last(), m_max);
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painter.draw_text(text_rect.translated(1, 1), text.characters(), Gfx::TextAlignment::CenterRight, Color::Black);
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painter.draw_text(text_rect, text.characters(), Gfx::TextAlignment::CenterRight, m_text_color);
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}
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}
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