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GPXSee/src/map/textpointitem.cpp

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#include <cmath>
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#include <QFont>
#include <QFontMetrics>
#include <QImage>
#include <QPainter>
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#include <QStaticText>
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#include "textpointitem.h"
#define FLAGS (Qt::AlignCenter | Qt::TextWordWrap | Qt::TextDontClip)
#define MAX_TEXT_WIDTH 8
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#define MIN_BOX_WIDTH 2
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static void expand(QRectF &rect, int width)
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{
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rect.adjust(-(width/2 - rect.width()/2), 0, width/2 - rect.width()/2, 0);
}
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TextPointItem::TextPointItem(const QPoint &point, const QString *text,
const QFont *font, const QImage *img, const QColor *color,
const QColor *haloColor, const QColor *bgColor, int padding, double rotate)
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: TextItem(font ? text : 0), _font(font), _img(img), _color(color),
_haloColor(haloColor), _bgColor(bgColor), _rotate(rotate)
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{
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if (_text) {
QFontMetrics fm(*_font);
int limit = _font->pixelSize() * MAX_TEXT_WIDTH;
_textRect = fm.boundingRect(QRect(0, 0, limit, 0), FLAGS, *_text);
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_textRect.adjust(0, 0, 1, 1);
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if (_bgColor && _textRect.width() < _font->pixelSize() * MIN_BOX_WIDTH)
expand(_textRect, _font->pixelSize() * MIN_BOX_WIDTH);
}
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setPos(point, padding);
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}
void TextPointItem::setPos(const QPoint &point, int padding)
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{
QPainterPath shape;
QRectF iconRect;
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if (_img && !_img->isNull()) {
QSizeF s(_img->size() / _img->devicePixelRatioF());
iconRect = QRectF(QPointF(point.x() - s.width() / 2,
point.y() - s.height()/2), s);
_textRect.moveTopLeft(QPointF(point.x() + s.width()/2 + padding,
point.y() - _textRect.height()/2));
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} else
_textRect.moveCenter(point);
_rect = _textRect | iconRect;
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shape.addRect(_rect);
_shape = shape;
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}
void TextPointItem::paint(QPainter *painter) const
{
if (_img && !_img->isNull()) {
QSizeF s(_img->size() / _img->devicePixelRatioF());
if (std::isnan(_rotate))
painter->drawImage(QPointF(_rect.left(), _rect.center().y()
- s.height()/2), *_img);
else {
painter->save();
painter->translate(QPointF(_rect.left() + s.width()/2,
_rect.center().y()));
painter->rotate(_rotate);
painter->drawImage(QPointF(-s.width()/2, -s.height()/2), *_img);
painter->restore();
}
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}
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if (_text) {
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if (_bgColor) {
painter->setPen(*_color);
painter->setBrush(*_bgColor);
painter->drawRect(_textRect);
painter->setBrush(Qt::NoBrush);
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painter->setFont(*_font);
painter->drawText(_textRect, FLAGS, *_text);
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} else if (_haloColor) {
QStaticText st(*_text);
st.setTextFormat(Qt::PlainText);
st.setTextWidth(_textRect.width());
st.setTextOption(QTextOption(Qt::AlignHCenter));
st.setPerformanceHint(QStaticText::AggressiveCaching);
painter->setPen(*_haloColor);
painter->setFont(*_font);
painter->drawStaticText(_textRect.topLeft() + QPointF(-1, -1), st);
painter->drawStaticText(_textRect.topLeft() + QPointF(+1, +1), st);
painter->drawStaticText(_textRect.topLeft() + QPointF(-1, +1), st);
painter->drawStaticText(_textRect.topLeft() + QPointF(+1, -1), st);
painter->drawStaticText(_textRect.topLeft() + QPointF(0, -1), st);
painter->drawStaticText(_textRect.topLeft() + QPointF(0, +1), st);
painter->drawStaticText(_textRect.topLeft() + QPointF(-1, 0), st);
painter->drawStaticText(_textRect.topLeft() + QPointF(+1, 0), st);
painter->setPen(*_color);
painter->drawStaticText(_textRect.topLeft(), st);
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} else {
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painter->setPen(*_color);
painter->setFont(*_font);
painter->drawText(_textRect, FLAGS, *_text);
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}
}
//painter->setPen(Qt::red);
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//painter.setBrush(Qt::NoBrush);
//painter->setRenderHint(QPainter::Antialiasing, false);
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//painter->drawRect(_rect);
}