this, SLOT(hover_point_changed()));
}
+QString Ruler::format_time(double t, unsigned int prefix,
+ unsigned int precision)
+{
+ const double multiplier = pow(10.0,
+ - prefix * 3 - FirstSIPrefixPower);
+
+ QString s;
+ QTextStream ts(&s);
+ ts.setRealNumberPrecision(precision);
+ ts << fixed << forcesign << (t * multiplier) <<
+ SIPrefixes[prefix] << "s";
+ return s;
+}
+
void Ruler::paintEvent(QPaintEvent*)
{
using namespace Qt;
+ const double SpacingIncrement = 32.0f;
+ const double MinValueSpacing = 32.0f;
+ const int ValueMargin = 3;
+
QPainter p(this);
p.setRenderHint(QPainter::Antialiasing);
- const double MinSpacing = 80;
+ double min_width = SpacingIncrement, typical_width;
+ double tick_period;
+ unsigned int prefix;
- const double min_period = _view.scale() * MinSpacing;
+ // Find tick spacing, and number formatting that does not cause
+ // value to collide.
+ do
+ {
+ const double min_period = _view.scale() * min_width;
- const int order = (int)floorf(log10f(min_period));
- const double order_decimal = pow(10, order);
+ const int order = (int)floorf(log10f(min_period));
+ const double order_decimal = pow(10, order);
- unsigned int unit = 0;
- double tick_period = 0.0f;
+ unsigned int unit = 0;
+
+ do
+ {
+ tick_period = order_decimal * ScaleUnits[unit++];
+ } while (tick_period < min_period && unit < countof(ScaleUnits));
+
+ prefix = (order - FirstSIPrefixPower) / 3;
+ assert(prefix < countof(SIPrefixes));
- do
- {
- tick_period = order_decimal * ScaleUnits[unit++];
- } while (tick_period < min_period && unit < countof(ScaleUnits));
- const unsigned int prefix = (order - FirstSIPrefixPower) / 3;
- assert(prefix < countof(SIPrefixes));
+ typical_width = p.boundingRect(0, 0, INT_MAX, INT_MAX,
+ AlignLeft | AlignTop, format_time(_view.offset(),
+ prefix)).width() + MinValueSpacing;
- const double multiplier = pow(10.0, - prefix * 3 - FirstSIPrefixPower);
+ min_width += SpacingIncrement;
+
+ } while(typical_width > tick_period / _view.scale());
const int text_height = p.boundingRect(0, 0, INT_MAX, INT_MAX,
AlignLeft | AlignTop, "8").height();
int division = (int)round(first_minor_division -
first_major_division * MinorTickSubdivision);
+
+ const int major_tick_y1 = text_height + ValueMargin * 2;
+ const int tick_y2 = height();
+ const int minor_tick_y1 = (major_tick_y1 + tick_y2) / 2;
+
while (1)
{
const double t = t0 + division * minor_tick_period;
if (division % MinorTickSubdivision == 0)
{
// Draw a major tick
- QString s;
- QTextStream ts(&s);
- ts << (t * multiplier) << SIPrefixes[prefix] << "s";
- p.drawText(x, 0, 0, text_height, AlignCenter |
- AlignTop | TextDontClip, s);
- p.drawLine(QPointF(x, text_height),
- QPointF(x, height()));
+ p.drawText(x, ValueMargin, 0, text_height,
+ AlignCenter | AlignTop | TextDontClip,
+ format_time(t, prefix));
+ p.drawLine(QPointF(x, major_tick_y1),
+ QPointF(x, tick_y2));
}
else
{
// Draw a minor tick
- p.drawLine(QPointF(x, (text_height + height()) / 2),
- QPointF(x, height()));
+ p.drawLine(QPointF(x, minor_tick_y1),
+ QPointF(x, tick_y2));
}
division++;
}
// Draw the cursors
- draw_cursors(p);
+ draw_cursors(p, prefix);
// Draw the hover mark
draw_hover_mark(p);
_grabbed_marker = NULL;
}
-void Ruler::draw_cursors(QPainter &p)
+void Ruler::draw_cursors(QPainter &p, unsigned int prefix)
{
if (!_view.cursors_shown())
return;
const QRect r = rect();
pair<Cursor, Cursor> &cursors = _view.cursors();
- cursors.first.paint_label(p, r);
- cursors.second.paint_label(p, r);
+ cursors.first.paint_label(p, r, prefix);
+ cursors.second.paint_label(p, r, prefix);
}
void Ruler::draw_hover_mark(QPainter &p)
return;
p.setPen(QPen(Qt::NoPen));
- p.setBrush(QBrush(QColor(Qt::black)));
+ p.setBrush(QBrush(palette().color(foregroundRole())));
const int b = height() - 1;
const QPointF points[] = {