C++ Painter::drawText方法代码示例

void RoundButton::Numbers::paint(Painter &p, int x, int y, int outerWidth) {
	auto digitsCount = _digits.size();
	if (!digitsCount) return;

	auto progress = anim::easeOutCirc(1., _a_ready.current(1.));
	auto width = anim::interpolate(_fromWidth, _toWidth, progress);

	QString singleChar('0');
	if (rtl()) x = outerWidth - x - width;
	x += width - _digits.size() * _digitWidth;
	auto fromTop = anim::interpolate(0, _st.font->height, progress) * (_growing ? 1 : -1);
	auto toTop = anim::interpolate(_st.font->height, 0, progress) * (_growing ? -1 : 1);
	for (auto i = 0; i != digitsCount; ++i) {
		auto &digit = _digits[i];
		auto from = digit.from;
		auto to = digit.to;
		if (from.unicode()) {
			p.setOpacity(1. - progress);
			singleChar[0] = from;
			p.drawText(x + (_digitWidth - digit.fromWidth) / 2, y + fromTop + _st.font->ascent, singleChar);
		}
		if (to.unicode()) {
			p.setOpacity(progress);
			singleChar[0] = to;
			p.drawText(x + (_digitWidth - digit.toWidth) / 2, y + toTop + _st.font->ascent, singleChar);
		}
		x += _digitWidth;
	}
	p.setOpacity(1.);
}

void CustomStyle::draw(Painter &p, const std::u16string &text, Style::TextElement elt,
                       const WidgetState& st, const Rect &r, const Style::Extra &extra) const {
  const Margin& m = extra.margin;


  p.setFont (font);
  p.translate(r.x,r.y);

  const Sprite& icon = iconSprite(extra.icon,st,r);
  int dX=0;

  if( !icon.size().isEmpty() && elt!=TE_CheckboxTitle ){
    p.setColor(Color(1.f));
    p.setTexture( icon );
    if( text.empty() ) {
      p.drawRect( (r.w-icon.w())/2, (r.h-icon.h())/2, icon.w(), icon.h() );
      } else {
      p.drawRect( m.left, (r.h-icon.h())/2, icon.w(), icon.h() );
      }
    }

  switch( elt ){
    case TE_LabelTitle:
    case TE_CheckboxTitle:
      p.setColor(Color(0,0,0,1));
      break;
    default:
      p.setColor(extra.fontColor);
    }

  const Size txtSz=extra.font.textSize(text);
  p.drawText( m.left+dX+(r.w-dX-m.xMargin()-txtSz.w)/2, (r.h-txtSz.h)/2, r.w-m.xMargin(), txtSz.h, text, AlignBottom );

  p.translate(-r.x,-r.y);
  }

void CalendarBox::Inner::paintRows(Painter &p, QRect clip) {
	p.setFont(st::calendarDaysFont);
	auto ms = getms();
	auto y = rowsTop();
	auto index = -_context->daysShift();
	auto highlightedIndex = _context->highlightedIndex();
	for (auto row = 0, rowsCount = _context->rowsCount(), daysCount = _context->daysCount()
		; row != rowsCount
		; ++row, y += st::calendarCellSize.height()) {
		auto x = rowsLeft();
		if (!myrtlrect(x, y, st::calendarCellSize.width() * kDaysInWeek, st::calendarCellSize.height()).intersects(clip)) {
			index += kDaysInWeek;
			continue;
		}
		for (auto col = 0; col != kDaysInWeek; ++col, ++index, x += st::calendarCellSize.width()) {
			auto rect = myrtlrect(x, y, st::calendarCellSize.width(), st::calendarCellSize.height());
			auto grayedOut = (index < 0 || index >= daysCount || !rect.intersects(clip));
			auto highlighted = (index == highlightedIndex);
			auto enabled = _context->isEnabled(index);
			auto innerLeft = x + (st::calendarCellSize.width() - st::calendarCellInner) / 2;
			auto innerTop = y + (st::calendarCellSize.height() - st::calendarCellInner) / 2;
			if (highlighted) {
				PainterHighQualityEnabler hq(p);
				p.setPen(Qt::NoPen);
				p.setBrush(grayedOut ? st::windowBgOver : st::dialogsBgActive);
				p.drawEllipse(myrtlrect(innerLeft, innerTop, st::calendarCellInner, st::calendarCellInner));
				p.setBrush(Qt::NoBrush);
			}
			auto it = _ripples.find(index);
			if (it != _ripples.cend()) {
				auto colorOverride = [highlighted, grayedOut] {
					if (highlighted) {
						return grayedOut ? st::windowBgRipple : st::dialogsRippleBgActive;
					}
					return st::windowBgOver;
				};
				it->second->paint(p, innerLeft, innerTop, width(), ms, &(colorOverride()->c));
				if (it->second->empty()) {
					_ripples.erase(it);
				}
			}
			if (highlighted) {
				p.setPen(grayedOut ? st::windowSubTextFg : st::dialogsNameFgActive);
			} else if (enabled) {
				p.setPen(grayedOut ? st::windowSubTextFg : st::boxTextFg);
			} else {
				p.setPen(st::windowSubTextFg);
			}
			p.drawText(rect, _context->labelFromIndex(index), style::al_center);
		}
	}
}

void CalendarBox::Inner::paintDayNames(Painter &p, QRect clip) {
	p.setFont(st::calendarDaysFont);
	p.setPen(st::calendarDaysFg);
	auto y = st::calendarPadding.top();
	auto x = rowsLeft();
	if (!myrtlrect(x, y, st::calendarCellSize.width() * kDaysInWeek, st::calendarDaysHeight).intersects(clip)) {
		return;
	}
	for (auto i = 0; i != kDaysInWeek; ++i, x += st::calendarCellSize.width()) {
		auto rect = myrtlrect(x, y, st::calendarCellSize.width(), st::calendarDaysHeight);
		if (!rect.intersects(clip)) {
			continue;
		}
		p.drawText(rect, langDayOfWeek(i + 1), style::al_top);
	}
}

void Inner::paintInlineItems(Painter &p, const QRect &r) {
	if (_restrictedLabel) {
		return;
	}
	if (_rows.isEmpty() && !_switchPmButton) {
		p.setFont(st::normalFont);
		p.setPen(st::noContactsColor);
		p.drawText(QRect(0, 0, width(), (height() / 3) * 2 + st::normalFont->height), lang(lng_inline_bot_no_results), style::al_center);
		return;
	}
	auto gifPaused = _controller->isGifPausedAtLeastFor(Window::GifPauseReason::InlineResults);
	InlineBots::Layout::PaintContext context(getms(), false, gifPaused, false);

	auto top = st::stickerPanPadding;
	if (_switchPmButton) {
		top += _switchPmButton->height() + st::inlineResultsSkip;
	}

	auto fromx = rtl() ? (width() - r.x() - r.width()) : r.x();
	auto tox = rtl() ? (width() - r.x()) : (r.x() + r.width());
	for (auto row = 0, rows = _rows.size(); row != rows; ++row) {
		auto &inlineRow = _rows[row];
		if (top >= r.top() + r.height()) break;
		if (top + inlineRow.height > r.top()) {
			auto left = st::inlineResultsLeft - st::buttonRadius;
			if (row == rows - 1) context.lastRow = true;
			for (int col = 0, cols = inlineRow.items.size(); col < cols; ++col) {
				if (left >= tox) break;

				auto item = inlineRow.items.at(col);
				auto w = item->width();
				if (left + w > fromx) {
					p.translate(left, top);
					item->paint(p, r.translated(-left, -top), &context);
					p.translate(-left, -top);
				}
				left += w;
				if (item->hasRightSkip()) {
					left += st::inlineResultsSkip;
				}
			}
		}
		top += inlineRow.height;
	}
}

void UnreadBar::paint(Painter &p, int y, int w) const {
	const auto bottom = y + height();
	y += marginTop();
	p.fillRect(
		0,
		y,
		w,
		height() - marginTop() - st::lineWidth,
		st::historyUnreadBarBg);
	p.fillRect(
		0,
		bottom - st::lineWidth,
		w,
		st::lineWidth,
		st::historyUnreadBarBorder);
	p.setFont(st::historyUnreadBarFont);
	p.setPen(st::historyUnreadBarFg);

	int left = st::msgServiceMargin.left();
	int maxwidth = w;
	if (Adaptive::ChatWide()) {
		maxwidth = qMin(
			maxwidth,
			st::msgMaxWidth
				+ 2 * st::msgPhotoSkip
				+ 2 * st::msgMargin.left());
	}
	w = maxwidth;

	const auto skip = st::historyUnreadBarHeight
		- 2 * st::lineWidth
		- st::historyUnreadBarFont->height;
	p.drawText(
		(w - width) / 2,
		y + (skip / 2) + st::historyUnreadBarFont->ascent,
		text);
}

void paintImportantSwitch(Painter &p, Mode current, int fullWidth, bool selected, bool onlyBackground) {
	p.fillRect(0, 0, fullWidth, st::dialogsImportantBarHeight, selected ? st::dialogsBgOver : st::dialogsBg);
	if (onlyBackground) {
		return;
	}

	p.setFont(st::semiboldFont);
	p.setPen(st::dialogsNameFg);

	int unreadTop = (st::dialogsImportantBarHeight - st::dialogsUnreadHeight) / 2;
	bool mutedHidden = (current == Dialogs::Mode::Important);
	QString text = lang(mutedHidden ? lng_dialogs_show_all_chats : lng_dialogs_hide_muted_chats);
	int textBaseline = unreadTop + (st::dialogsUnreadHeight - st::dialogsUnreadFont->height) / 2 + st::dialogsUnreadFont->ascent;
	p.drawText(st::dialogsPadding.x(), textBaseline, text);

	if (mutedHidden) {
		if (int32 unread = App::histories().unreadMutedCount()) {
			int unreadRight = fullWidth - st::dialogsPadding.x();
			UnreadBadgeStyle st;
			st.muted = true;
			paintUnreadCount(p, QString::number(unread), unreadRight, unreadTop, st, nullptr);
		}
	}
}

void paintUnreadCount(Painter &p, const QString &text, int x, int y, const UnreadBadgeStyle &st, int *outUnreadWidth) {
	int unreadWidth = st.font->width(text);
	int unreadRectWidth = unreadWidth + 2 * st.padding;
	int unreadRectHeight = st.size;
	accumulate_max(unreadRectWidth, unreadRectHeight);

	int unreadRectLeft = x;
	if ((st.align & Qt::AlignHorizontal_Mask) & style::al_center) {
		unreadRectLeft = (x - unreadRectWidth) / 2;
	} else if ((st.align & Qt::AlignHorizontal_Mask) & style::al_right) {
		unreadRectLeft = x - unreadRectWidth;
	}
	int unreadRectTop = y;
	if (outUnreadWidth) {
		*outUnreadWidth = unreadRectWidth;
	}

	paintUnreadBadge(p, QRect(unreadRectLeft, unreadRectTop, unreadRectWidth, unreadRectHeight), st);

	auto textTop = st.textTop ? st.textTop : (unreadRectHeight - st.font->height) / 2;
	p.setFont(st.font);
	p.setPen(st.active ? st::dialogsUnreadFgActive : (st.selected ? st::dialogsUnreadFgOver : st::dialogsUnreadFg));
	p.drawText(unreadRectLeft + (unreadRectWidth - unreadWidth) / 2, unreadRectTop + textTop + st.font->ascent, text);
}