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112 lines
3.4 KiB
112 lines
3.4 KiB
/*
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* Copyright (c) 2004-2007 André Wöbbeking <Woebbeking@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "tooltip.h"
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#include <tdeglobal.h>
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#include <tdeglobalsettings.h>
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#include <tqsimplerichtext.h>
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namespace Cervisia
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{
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static TQString truncateLines(const TQString&, const TQFontMetrics&, const TQSize&);
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static TQString truncateLines(const TQString&, const TQFont&, const TQPoint&, const TQRect&);
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ToolTip::ToolTip(TQWidget* widget)
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: TQObject(widget), TQToolTip(widget)
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{
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}
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void ToolTip::maybeTip(const TQPoint& pos)
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{
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TQRect rect;
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TQString text;
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emit queryToolTip(pos, rect, text);
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if (rect.isValid() && !text.isEmpty())
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{
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text = truncateLines(text,
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font(),
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parentWidget()->mapToGlobal(pos),
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TDEGlobalSettings::desktopGeometry(parentWidget()));
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tip(rect, text);
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}
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}
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// Primtive routine to truncate the text. size.width() is ignored, only
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// size.height() is used at the moment to keep it fast. It doesn't work
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// correct if text lines have different heights.
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TQString truncateLines(const TQString& text,
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const TQFontMetrics& fm,
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const TQSize& size)
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{
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const TQChar newLine('\n');
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const int lineSpacing(fm.lineSpacing());
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const int numberOfLines(text.contains(newLine) + 1);
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const int maxNumberOfLines(size.height() / lineSpacing);
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if (numberOfLines <= maxNumberOfLines)
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return text;
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const TQChar* unicode(text.unicode());
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for (int count(maxNumberOfLines); count; ++unicode)
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if (*unicode == newLine)
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--count;
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return text.left(unicode - text.unicode() - 1);
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}
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// Truncate the tooltip's text if necessary
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TQString truncateLines(const TQString& text,
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const TQFont& font,
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const TQPoint& globalPos,
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const TQRect& desktopGeometry)
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{
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// maximum size of the tooltip, - 10 just to be safe
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const int maxWidth(kMax(desktopGeometry.width() - globalPos.x(), globalPos.x())
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- desktopGeometry.left() - 10);
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const int maxHeight(kMax(desktopGeometry.height() - globalPos.y(), globalPos.y())
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- desktopGeometry.top() - 10);
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// calculate the tooltip's size
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const TQSimpleRichText layoutedText(text, font);
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// only if the tooltip's size is bigger in x- and y-direction the text must
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// be truncated otherwise the tip is moved to a position where it fits
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return ((layoutedText.widthUsed() > maxWidth)
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&& (layoutedText.height() > maxHeight))
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? truncateLines(text, TQFontMetrics(font), TQSize(maxWidth, maxHeight))
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: text;
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}
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} // namespace Cervisia
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#include "tooltip.moc"
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