?? extraeffectsplugin.cpp
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#include <QtGui>#include "extraeffectsplugin.h"QStringList ExtraEffectsPlugin::effects() const{ return QStringList() << "BigMiddle" << "BigEnds";}QPixmap ExtraEffectsPlugin::applyEffect(const QString &effect, const QString &text, const QFont &font, const QSize &size, const QPen &pen, const QBrush &brush){ QFont myFont = font; QFontMetrics metrics(myFont); while ((metrics.width(text) > size.width() || metrics.height() > size.height()) && myFont.pointSize() > 9) { myFont.setPointSize(myFont.pointSize() - 1); metrics = QFontMetrics(myFont); } QPixmap pixmap(size); QPainter painter(&pixmap); painter.setFont(myFont); painter.setPen(pen); painter.setBrush(brush); painter.setRenderHint(QPainter::Antialiasing, true); painter.setRenderHint(QPainter::TextAntialiasing, true); painter.setRenderHint(QPainter::SmoothPixmapTransform, true); painter.eraseRect(pixmap.rect()); int middle = text.length() / 2; qreal x = (size.width() - metrics.width(text)) / 2; qreal stepSize = ((myFont.pointSizeF() / 2) / middle) + 1; if (effect == "BigEnds") { myFont.setPointSizeF(myFont.pointSizeF() + stepSize); stepSize = -stepSize; } else { myFont.setPointSizeF(myFont.pointSizeF() / 2); } QPainterPath path; for (int i = 0; i < text.length(); ++i) { QString str(text[i]); myFont.setPointSizeF(myFont.pointSizeF() + stepSize); QFontMetrics metrics(myFont); qreal y = size.height() - metrics.descent() - ((size.height() - metrics.height()) / 2); path.addText(x, y, myFont, str); x += metrics.width(str) + 1; if (i == middle) stepSize = -stepSize; } painter.drawPath(path); return pixmap;}Q_EXPORT_PLUGIN2(extraeffectsplugin, ExtraEffectsPlugin)?? 快捷鍵說明
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