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#include "timeaxiswidget.h"
#include "profiling.h"
#include <qmath.h>
#include <QPainter>
TimeAxisWidget::TimeAxisWidget(QWidget* parent) :
GraphAxisWidget(parent)
{
}
void TimeAxisWidget::paintEvent(QPaintEvent *)
{
/* TODO: Support selections? */
/* TODO: Vertical scrolling? */
QPainter painter(this);
painter.setPen(Qt::black);
painter.setBrush(Qt::lightGray);
painter.drawRect(0, 0, width() - 1, height() - 1);
if (m_orientation == GraphAxisWidget::Vertical) {
int axisHeight = height() - 1;
int fontHeight = painter.fontMetrics().height();
int ticks = axisHeight / (fontHeight * 2);
double range = m_valueMax - m_valueMin;
double step = range / (double)ticks;
double step10 = qPow(10.0, qFloor(qLn(step) / qLn(10.0)));
step = qFloor((step / step10) * 2) * (step10 / 2);
if (step <= 0) {
return;
}
painter.resetTransform();
for (double tick = 0; tick <= range; tick += step) {
int y = axisHeight - ((tick / range) * axisHeight);
painter.drawLine(width() - 8, y, width(), y);
painter.drawText(0,
qBound(0, y - fontHeight / 2, axisHeight - fontHeight),
width() - 10,
fontHeight,
Qt::AlignRight | Qt::AlignVCenter,
Profiling::getTimeString(tick, m_valueMax));
}
} else {
int axisWidth = width() - 1;
int fontWidth = painter.fontMetrics().width("0.000 ns");
int fontHeight= painter.fontMetrics().height();
int ticks = axisWidth / (fontWidth * 2);
double range = m_valueMax - m_valueMin;
double step = range / (double)ticks;
double step10 = qPow(10.0, qFloor(qLn(step) / qLn(10.0)));
step = qFloor((step / step10) * 2) * (step10 / 2);
if (step <= 0) {
return;
}
painter.resetTransform();
for (double tick = 0; tick <= range; tick += step) {
int x = (tick / range) * axisWidth;
painter.drawLine(x, 0, x, 8);
painter.drawText(qBound(0, x - fontWidth / 2, axisWidth - fontWidth),
8,
fontWidth,
fontHeight,
Qt::AlignHCenter | Qt::AlignTop,
Profiling::getTimeString(tick, m_valueMax));
}
}
}
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