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Profiler: Display timing information in ProfileTimelineWidget

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Currently, there is no way to know when in a profile's duration a
sample was taken. This commit adds a basic timestamp to the timeline
widget, and a black bar to show where the cursor is hovering over.
This commit is contained in:
Sahan Fernando 2021-02-06 14:36:11 +11:00 committed by Andreas Kling
parent ff3ae331f7
commit 7e9122950e
Notes: sideshowbarker 2024-07-18 22:34:24 +09:00 
Author: https://github.com/ccapitalK
Commit: https://github.com/SerenityOS/serenity/commit/7e9122950e4
Pull-request: https://github.com/SerenityOS/serenity/pull/5242
2 changed files with 31 additions and 5 deletions
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35
Userland/DevTools/Profiler/ProfileTimelineWidget.cpp
View file

@ -27,12 +27,14 @@
#include "ProfileTimelineWidget.h"
#include "Profile.h"
#include <LibGUI/Painter.h>
#include <LibGfx/Font.h>
ProfileTimelineWidget::ProfileTimelineWidget(Profile& profile)
: m_profile(profile)
{
set_fill_with_background_color(true);
set_fixed_height(80);
m_hover_time = m_profile.first_timestamp();
}
ProfileTimelineWidget::~ProfileTimelineWidget()
@ -58,7 +60,7 @@ void ProfileTimelineWidget::paint_event(GUI::PaintEvent& event)
bool in_kernel = event.in_kernel;
Color color = in_kernel ? Color::from_rgb(0xc25e5a) : Color::from_rgb(0x5a65c2);
for (int i = 0; i < cw; ++i)
for (int i = 1; i <= cw; ++i)
painter.draw_line({ x + i, frame_thickness() + column_height }, { x + i, height() - frame_thickness() * 2 }, color);
}
@ -67,7 +69,28 @@ void ProfileTimelineWidget::paint_event(GUI::PaintEvent& event)
int select_start_x = (int)((float)(normalized_start_time - m_profile.first_timestamp()) * column_width);
int select_end_x = (int)((float)(normalized_end_time - m_profile.first_timestamp()) * column_width);
int select_hover_x = (int)((float)(m_hover_time - m_profile.first_timestamp()) * column_width);
painter.fill_rect({ select_start_x, frame_thickness(), select_end_x - select_start_x, height() - frame_thickness() * 2 }, Color(0, 0, 0, 60));
painter.fill_rect({ select_hover_x, frame_thickness(), 1, height() - frame_thickness() * 2 }, Color::NamedColor::Black);
{
StringBuilder timeline_desc_builder;
timeline_desc_builder.appendff("Time: {} ms", m_hover_time - m_profile.first_timestamp());
if (normalized_start_time != normalized_end_time) {
auto start = normalized_start_time - m_profile.first_timestamp();
auto end = normalized_end_time - m_profile.first_timestamp();
timeline_desc_builder.appendff(", Selection: {} - {} ms", start, end);
}
const auto text = timeline_desc_builder.build();
Gfx::IntRect rect {
frame_thickness() + 3,
frame_thickness() + 3,
font().width(text),
font().glyph_height()
};
painter.draw_text(rect, text, font());
}
}
u64 ProfileTimelineWidget::timestamp_at_x(int x) const
@ -91,11 +114,13 @@ void ProfileTimelineWidget::mousedown_event(GUI::MouseEvent& event)
void ProfileTimelineWidget::mousemove_event(GUI::MouseEvent& event)
{
if (!m_selecting)
return;
m_hover_time = timestamp_at_x(event.x());
if (m_selecting) {
m_select_end_time = m_hover_time;
m_profile.set_timestamp_filter_range(m_select_start_time, m_select_end_time);
}
m_select_end_time = timestamp_at_x(event.x());
m_profile.set_timestamp_filter_range(m_select_start_time, m_select_end_time);
update();
}

1
Userland/DevTools/Profiler/ProfileTimelineWidget.h
View file

@ -50,4 +50,5 @@ private:
bool m_selecting { false };
u64 m_select_start_time { 0 };
u64 m_select_end_time { 0 };
u64 m_hover_time { 0 };
};