QPixmap shadowText(QString text, const QFont &font, QColor textColor, QColor shadowColor, QPoint offset, int radius)
{
//don't try to paint stuff on a future null pixmap because the text is empty
if (text.isEmpty()) {
return QPixmap();
}
// Draw text
QFontMetrics fm(font);
QRect textRect = fm.boundingRect(text);
QPixmap textPixmap(textRect.width(), fm.height());
textPixmap.fill(Qt::transparent);
QPainter p(&textPixmap);
p.setPen(textColor);
p.setFont(font);
// FIXME: the center alignment here is odd: the rect should be the size needed by
// the text, but for some fonts and configurations this is off by a pixel or so
// and "centering" the text painting 'fixes' that. Need to research why
// this is the case and determine if we should be painting it differently here,
// doing soething different with the boundingRect call or if it's a problem
// in Qt itself
p.drawText(textPixmap.rect(), Qt::AlignCenter, text);
p.end();
//Draw blurred shadow
QImage img(textRect.size() + QSize(radius * 2, radius * 2), QImage::Format_ARGB32_Premultiplied);
img.fill(0);
p.begin(&img);
p.drawImage(QPoint(radius, radius), textPixmap.toImage());
p.end();
shadowBlur(img, radius, shadowColor);
//Compose text and shadow
int addSizeX = qMax(0, qAbs(offset.x()) - radius);
int addSizeY = qMax(0, qAbs(offset.y()) - radius);
QPixmap finalPixmap(img.size() + QSize(addSizeX, addSizeY));
finalPixmap.fill(Qt::transparent);
p.begin(&finalPixmap);
p.drawImage(qMax(0, offset.x()), qMax(0, offset.y()), img);
p.drawPixmap(radius + qMax(0, -offset.x()), radius + qMax(0, -offset.y()), textPixmap);
p.end();
return finalPixmap;
}
TQImage *KFileIVIDesktop::buildShadow( TQPainter *p, const int align,
TQColor &shadowColor )
{
TQPainter pixPainter;
int spread = shadowThickness();
TQPixmap textPixmap(textRect( FALSE ).width() + spread * 2 + 2,
textRect( FALSE ).height() + spread * 2 + 2);
textPixmap.fill(TQColor(0,0,0));
textPixmap.setMask( textPixmap.createHeuristicMask(TRUE) );
pixPainter.begin(&textPixmap);
pixPainter.setPen(white); // get the pen from the root painter
pixPainter.setFont(p->font()); // get the font from the root painter
wordWrap()->drawText( &pixPainter, spread, spread, align | KWordWrap::Truncate );
pixPainter.end();
return new TQImage(m_shadow->makeShadow(textPixmap, shadowColor));
}
void Flags::drawLabel(QPainter& painter, const QString& layoutText, bool flagShown)
{
QFont font = painter.font();
QRect rect = painter.window();
// int fontSize = layoutText.length() == 2
// ? height * 7 / 10
// : height * 5 / 10;
int fontSize = rect.height();// * 7 /10;
font.setPixelSize(fontSize);
font.setWeight(QFont::DemiBold);
QFontMetrics fm = painter.fontMetrics();
int width = fm.width(layoutText);
if( width > rect.width() * 2 / 3 ) {
fontSize = round( (double)fontSize * ((double)rect.width()*2/3) / width );
}
int smallestReadableSize = KGlobalSettings::smallestReadableFont().pixelSize();
if( fontSize < smallestReadableSize ) {
fontSize = smallestReadableSize;
}
font.setPixelSize(fontSize);
#ifdef DONT_USE_PLASMA
painter.setFont(font);
painter.setPen(Qt::white);
painter.drawText(QRect(rect).adust(1,1,0,0), Qt::AlignCenter | Qt::AlignHCenter, layoutText);
painter.setPen(Qt::black);
painter.drawText(rect, Qt::AlignCenter | Qt::AlignHCenter, layoutText);
#else
// we init svg so that we get notification about theme change
getSvg();
Plasma::Theme theme;
QColor textColor = flagShown ? Qt::black : theme.color(Plasma::Theme::TextColor);
QPoint offset = QPoint(0, 0);
auto shadowText = [&font, &textColor, &offset](QString text) {
//don't try to paint stuff on a future null pixmap because the text is empty
if (text.isEmpty()) {
return QPixmap();
}
// Draw text
QFontMetrics fm(font);
QRect textRect = fm.boundingRect(text);
QPixmap textPixmap(textRect.width(), fm.height());
textPixmap.fill(Qt::transparent);
QPainter p(&textPixmap);
p.setPen(textColor);
p.setFont(font);
// FIXME: the center alignment here is odd: the rect should be the size needed by
// the text, but for some fonts and configurations this is off by a pixel or so
// and "centering" the text painting 'fixes' that. Need to research why
// this is the case and determine if we should be painting it differently here,
// doing soething different with the boundingRect call or if it's a problem
// in Qt itself
p.drawText(textPixmap.rect(), Qt::AlignCenter, text);
p.end();
return textPixmap;
};
// QPixmap pixmap = Plasma::PaintUtils::texturedText(layoutText, font, svg);
QPixmap labelPixmap = shadowText(layoutText);
int y = round((rect.height() - labelPixmap.height()) / 2.0);
int x = round((rect.width() - labelPixmap.width()) / 2.0);
painter.drawPixmap(QPoint(x, y), labelPixmap);
#endif
}
void PanelButton::drawButtonLabel(QPainter *p)
{
QPixmap icon = labelIcon();
bool active = isDown() || isOn();
if (active)
{
icon = icon.convertToImage().smoothScale(icon.width() - 2,
icon.height() - 2);
}
if (!m_buttonText.isEmpty() && orientation() == Horizontal)
{
int h = height();
int w = width();
int y = (h - icon.height())/2;
p->save();
QFont f = font();
double fontPercent = m_fontPercent;
if (active)
{
fontPercent *= .8;
}
f.setPixelSize(KMIN(h, KMAX(int(float(h) * m_fontPercent), 16)));
QFontMetrics fm(f);
p->setFont(f);
/* Draw shadowed text */
bool reverse = QApplication::reverseLayout();
QPainter::TextDirection rtl = reverse ? QPainter::RTL : QPainter::LTR;
if (!reverse && !icon.isNull())
{
/* Draw icon */
p->drawPixmap(3, y, icon);
}
int tX = reverse ? 3 : icon.width() + KMIN(25, KMAX(5, fm.width('m') / 2));
int tY = fm.ascent() + ((h - fm.height()) / 2);
QColor shadCol = KickerLib::shadowColor(m_textColor);
// get a transparent pixmap
QPainter pixPainter;
QPixmap textPixmap(w, h);
textPixmap.fill(QColor(0,0,0));
textPixmap.setMask(textPixmap.createHeuristicMask(true));
// draw text
pixPainter.begin(&textPixmap);
pixPainter.setPen(m_textColor);
pixPainter.setFont(p->font()); // get the font from the root painter
pixPainter.drawText(tX, tY, m_buttonText, -1, rtl);
pixPainter.end();
if (!s_textShadowEngine)
{
KShadowSettings* shadset = new KShadowSettings();
shadset->setOffsetX(0);
shadset->setOffsetY(0);
shadset->setThickness(1);
shadset->setMaxOpacity(96);
s_textShadowEngine = new KShadowEngine(shadset);
}
// draw shadow
QImage img = s_textShadowEngine->makeShadow(textPixmap, shadCol);
p->drawImage(0, 0, img);
p->save();
p->setPen(m_textColor);
p->drawText(tX, tY, m_buttonText, -1, rtl);
p->restore();
if (reverse && !icon.isNull())
{
p->drawPixmap(w - icon.width() - 3, y, icon);
}
p->restore();
}
else if (!icon.isNull())
{
int y = (height() - icon.height()) / 2;
int x = (width() - icon.width()) / 2;
p->drawPixmap(x, y, icon);
}
if (m_drawArrow && (m_highlight || active))
{
QStyle::PrimitiveElement e = QStyle::PE_ArrowUp;
int arrowSize = style().pixelMetric(QStyle::PM_MenuButtonIndicator);
QRect r((width() - arrowSize)/2, 0, arrowSize, arrowSize);
switch (m_arrowDirection)
{
case KPanelExtension::Top:
e = QStyle::PE_ArrowUp;
break;
case KPanelExtension::Bottom:
e = QStyle::PE_ArrowDown;
r.moveBy(0, height() - arrowSize);
break;
case KPanelExtension::Right:
e = QStyle::PE_ArrowRight;
r = QRect(width() - arrowSize, (height() - arrowSize)/2, arrowSize, arrowSize);
break;
case KPanelExtension::Left:
e = QStyle::PE_ArrowLeft;
r = QRect(0, (height() - arrowSize)/2, arrowSize, arrowSize);
break;
case KPanelExtension::Floating:
if (orientation() == Horizontal)
{
e = QStyle::PE_ArrowDown;
r.moveBy(0, height() - arrowSize);
}
else if (QApplication::reverseLayout())
{
e = QStyle::PE_ArrowLeft;
r = QRect(0, (height() - arrowSize)/2, arrowSize, arrowSize);
}
else
{
e = QStyle::PE_ArrowRight;
r = QRect(width() - arrowSize, (height() - arrowSize)/2, arrowSize, arrowSize);
}
break;
}
int flags = QStyle::Style_Enabled;
if (active)
{
flags |= QStyle::Style_Down;
}
style().drawPrimitive(e, p, r, colorGroup(), flags);
}
}
/**
Take data from image, draw text at x|y with specified parameters.
If destPainter is null, draw to image,
if destPainter is not null, draw directly using the painter.
Returns modified area of image.
*/
QRect InsertTextWidget::composeImage(DImg* const image, QPainter* const destPainter,
int x, int y,
QFont font, float pointSize, int textRotation, QColor textColor,
int textOpacity, int alignMode, const QString& textString,
bool transparentBackground, QColor backgroundColor,
BorderMode borderMode, int borderWidth, int spacing, float fontScale)
{
/*
The problem we have to solve is that we have no pixel access to font rendering,
we have to let Qt do the drawing. On the other hand we need to support 16 bit, which
cannot be done with QPixmap.
The current solution cuts out the text area, lets Qt do its drawing, converts back and blits to original.
*/
int maxWidth, maxHeight;
if (x == -1 && y == -1)
{
maxWidth = image->width();
maxHeight = image->height();
}
else
{
maxWidth = image->width() - x;
maxHeight = image->height() - y;
}
fontScale = qMax(0.01f, fontScale);
// find out size of the area that we are drawing to
font.setPointSizeF(pointSize);
QFontMetrics fontMt(font);
QRect fontRect = fontMt.boundingRect(0, 0,
qRound(maxWidth / fontScale),
qRound(maxHeight / fontScale),
alignMode, textString);
fontRect.setWidth(qRound(fontRect.width() * fontScale));
fontRect.setHeight(qRound(fontRect.height() * fontScale));
if (!fontRect.isValid())
{
return QRect();
}
int fontWidth, fontHeight;
switch (textRotation)
{
case ROTATION_NONE:
case ROTATION_180:
default:
fontWidth = fontRect.width();
fontHeight = fontRect.height();
break;
case ROTATION_90:
case ROTATION_270:
fontWidth = fontRect.height();
fontHeight = fontRect.width();
break;
}
// x, y == -1 means that we have to find a good initial position for the text here
if (x == -1 && y == -1)
{
int boxWidth = fontWidth + 2 * borderWidth + 2 * spacing;
int boxHeight = fontHeight + 2 * borderWidth + 2 * spacing;
// was a valid position hint stored from last use?
if (d->positionHint.isValid())
{
// We assume that people tend to orient text along the edges,
// so we do some guessing so that positions such as "in the lower right corner"
// will be remembered across different image sizes.
// get relative positions
float fromTop = (float)d->positionHint.top() / 10000.0;
float fromBottom = 1.0 - (float)d->positionHint.bottom() / 10000.0;
float fromLeft = (float)d->positionHint.left() / 10000.0;
float fromRight = 1.0 - (float)d->positionHint.right() / 10000.0;
// calculate horizontal position
if (fromLeft < fromRight)
{
x = qRound(fromLeft * maxWidth);
// we are placing from the smaller distance,
// so if now the larger distance is actually too small,
// fall back to standard placement, nothing to lose.
if (x + boxWidth > maxWidth)
{
x = qMax( (maxWidth - boxWidth) / 2, 0);
}
}
else
{
x = maxWidth - qRound(fromRight * maxWidth) - boxWidth;
if ( x < 0 )
{
x = qMax( (maxWidth - boxWidth) / 2, 0);
}
}
// calculate vertical position
if (fromTop < fromBottom)
{
y = qRound(fromTop * maxHeight);
if (y + boxHeight > maxHeight)
{
y = qMax( (maxHeight - boxHeight) / 2, 0);
}
}
else
{
y = maxHeight - qRound(fromBottom * maxHeight) - boxHeight;
if ( y < 0 )
{
y = qMax( (maxHeight - boxHeight) / 2, 0);
}
}
if (! QRect(x, y, boxWidth, boxHeight).
intersects(QRect(0, 0, maxWidth, maxHeight)) )
{
// emergency fallback - nothing is visible
x = qMax( (maxWidth - boxWidth) / 2, 0);
y = qMax( (maxHeight - boxHeight) / 2, 0);
}
// invalidate position hint, use only once
d->positionHint = QRect();
}
else
{
// use standard position
x = qMax( (maxWidth - boxWidth) / 2, 0);
y = qMax( (maxHeight - boxHeight) / 2, 0);
}
}
// create a rectangle relative to image
QRect drawRect( x, y, fontWidth + 2 * borderWidth + 2 * spacing, fontHeight + 2 * borderWidth + 2 * spacing);
// create a rectangle relative to textArea, excluding the border
QRect textAreaBackgroundRect( borderWidth, borderWidth, fontWidth + 2 * spacing, fontHeight + 2 * spacing);
// create a rectangle relative to textArea, excluding the border and spacing
QRect textAreaTextRect( borderWidth + spacing, borderWidth + spacing, fontWidth, fontHeight );
// create a rectangle relative to textArea, including the border,
// for drawing the rectangle, taking into account that the width of the QPen goes in and out in equal parts
QRect textAreaDrawRect( borderWidth / 2, borderWidth / 2, fontWidth + borderWidth + 2 * spacing,
fontHeight + borderWidth + 2 * spacing );
// cut out the text area
DImg textArea = image->copy(drawRect);
if (textArea.isNull())
{
return QRect();
}
// compose semi-transparent background over textArea
DColorComposer* composer = DColorComposer::getComposer(DColorComposer::PorterDuffNone);
if (transparentBackground)
{
DImg transparentLayer(textAreaBackgroundRect.width(), textAreaBackgroundRect.height(), textArea.sixteenBit(), true);
DColor transparent(backgroundColor);
transparent.setAlpha(d->transparency);
if (image->sixteenBit())
{
transparent.convertToSixteenBit();
}
transparentLayer.fill(transparent);
textArea.bitBlendImage(composer, &transparentLayer, 0, 0, transparentLayer.width(), transparentLayer.height(),
textAreaBackgroundRect.x(), textAreaBackgroundRect.y());
}
DImg textNotDrawn;
if (textArea.sixteenBit())
{
textNotDrawn = textArea.copy();
textNotDrawn.convertToEightBit();
}
else
{
textNotDrawn = textArea;
}
// We have no direct pixel access to font rendering, so now we need to use Qt/X11 for the drawing
// convert text area to pixmap
QPixmap pixmap;
if (destPainter)
{
// We working on tool preview, deal with CM as well
pixmap = d->iface->convertToPixmap(textNotDrawn);
}
else
{
// We working on target image. Do no apply double CM adjustment here.
pixmap = textNotDrawn.convertToPixmap();
}
int fontScaleWidth = qRound(fontWidth / fontScale);
int fontScaleHeight = qRound(fontHeight / fontScale);
QPixmap textPixmap(fontScaleWidth, fontScaleHeight);
textPixmap.fill(Qt::transparent);
QPainter tp(&textPixmap);
tp.setOpacity((qreal)textOpacity / 100.0);
tp.setPen(QPen(textColor, 1));
tp.setFont(font);
switch (textRotation)
{
case ROTATION_NONE:
tp.drawText(0, 0, fontScaleWidth, fontScaleHeight,
alignMode, textString);
break;
case ROTATION_90:
tp.translate(fontScaleWidth, 0);
tp.rotate(90.0);
tp.drawText(0, 0, fontScaleHeight, fontScaleWidth,
alignMode, textString);
break;
case ROTATION_180:
tp.translate(fontScaleWidth, fontScaleHeight);
tp.rotate(180.0);
tp.drawText(0, 0, fontScaleWidth, fontScaleHeight,
alignMode, textString);
break;
case ROTATION_270:
tp.translate(0, fontScaleHeight);
tp.rotate(270.0);
tp.drawText(0, 0, fontScaleHeight, fontScaleWidth,
alignMode, textString);
break;
}
tp.end();
// paint on pixmap
QPainter p(&pixmap);
p.drawPixmap(textAreaTextRect, textPixmap.scaled(fontWidth,
fontHeight,
Qt::IgnoreAspectRatio,
Qt::SmoothTransformation));
// Drawing rectangle around text.
if (borderMode == BORDER_NORMAL) // Decorative border using text color.
{
p.setPen( QPen(textColor, borderWidth, Qt::SolidLine,
Qt::SquareCap, Qt::RoundJoin) ) ;
p.drawRect(textAreaDrawRect);
}
else if (borderMode == BORDER_SUPPORT) // Make simple dot line border to help user.
{
p.setPen(QPen(Qt::white, 1, Qt::SolidLine));
p.drawRect(textAreaDrawRect);
p.setPen(QPen(Qt::red, 1, Qt::DotLine));
p.drawRect(textAreaDrawRect);
}
p.end();
if (!destPainter)
{
// convert to QImage, then to DImg
QImage pixmapImage = pixmap.toImage();
DImg textDrawn(pixmapImage.width(), pixmapImage.height(), false, true, pixmapImage.bits());
// This does not work: during the conversion, colors are altered significantly (diffs of 1 to 10 in each component),
// so we cannot find out which pixels have actually been touched.
/*
// Compare the result of drawing with the previous version.
// Set all unchanged pixels to transparent
DColor color, ncolor;
uchar *ptr, *nptr;
ptr = textDrawn.bits();
nptr = textNotDrawn.bits();
int bytesDepth = textDrawn.bytesDepth();
int numPixels = textDrawn.width() * textDrawn.height();
for (int i = 0; i < numPixels; ++i, ptr+= bytesDepth, nptr += bytesDepth)
{
color.setColor(ptr, false);
ncolor.setColor(nptr, false);
if ( color.red() == ncolor.red() &&
color.green() == ncolor.green() &&
color.blue() == ncolor.blue())
{
color.setAlpha(0);
color.setPixel(ptr);
}
}
// convert to 16 bit if needed
*/
textDrawn.convertToDepthOfImage(&textArea);
// now compose to original: only pixels affected by drawing text and border are changed, not whole area
textArea.bitBlendImage(composer, &textDrawn, 0, 0, textDrawn.width(), textDrawn.height(), 0, 0);
// copy result to original image
image->bitBltImage(&textArea, drawRect.x(), drawRect.y());
}
else
{
destPainter->drawPixmap(drawRect.x(), drawRect.y(), pixmap, 0, 0, pixmap.width(), pixmap.height());
}
delete composer;
return drawRect;
}
