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ProcessManager: Add CPU/memory usage graphs in a separate tab.

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Finally we get some real use for the new GTabWidget. :^)
This commit is contained in:
Andreas Kling 2019-05-06 03:21:23 +02:00
parent 6df3df62be
commit 25bb7a59ac
10 changed files with 140 additions and 19 deletions
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48
Applications/ProcessManager/GraphWidget.cpp Normal file
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#include "GraphWidget.h"
#include <LibGUI/GPainter.h>
GraphWidget::GraphWidget(GWidget* parent)
: GFrame(parent)
{
set_frame_thickness(2);
set_frame_shape(FrameShape::Container);
set_frame_shadow(FrameShadow::Sunken);
}
GraphWidget::~GraphWidget()
{
}
void GraphWidget::add_value(int value)
{
m_values.enqueue(value);
update();
}
void GraphWidget::paint_event(GPaintEvent& event)
{
GFrame::paint_event(event);
GPainter painter(*this);
painter.add_clip_rect(event.rect());
painter.add_clip_rect(frame_inner_rect());
painter.fill_rect(event.rect(), Color::Black);
auto inner_rect = frame_inner_rect();
float scale = (float)inner_rect.height() / (float)m_max;
for (int i = 0; i < m_values.size(); ++i) {
int x = inner_rect.right() - i + 1;
if (x < 0)
break;
float scaled_value = (float)m_values.at(m_values.size() - i) * scale;
painter.draw_line({ x, inner_rect.bottom() }, { x, inner_rect.bottom() - (int)scaled_value }, m_graph_color);
}
if (!m_values.is_empty() && text_formatter) {
Rect text_rect = inner_rect.shrunken(8, 8);
text_rect.set_height(font().glyph_height());
auto text = text_formatter(m_values.last(), m_max);
painter.draw_text(text_rect.translated(1, 1), text.characters(), TextAlignment::CenterRight, Color::Black);
painter.draw_text(text_rect, text.characters(), TextAlignment::CenterRight, m_text_color);
}
}