AbaKus – a complex calculator
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/*
* dragsupport.cpp - part of abakus
* Copyright (C) 2004, 2005 Michael Pyne <michael.pyne@kdemail.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <tqstring.h>
#include <tqpixmap.h>
#include <tqimage.h>
#include <tqpainter.h>
#include <tqcolor.h>
#include <tqfont.h>
#include <tqbrush.h>
#include <tqfontmetrics.h>
#include "dragsupport.h"
namespace DragSupport
{
TQPixmap makePixmap(const TQString &text, const TQFont &font)
{
TQColor background(234, 178, 230);
TQFontMetrics fm(font);
int height = 2 * fm.height();
TQSize bonusSize (height, 0);
TQSize size(fm.width(text), height);
TQImage image(size + bonusSize, 32);
image.setAlphaBuffer(false);
image.fill(0); // All transparent pixels
image.setAlphaBuffer(true);
TQPixmap pix(size + bonusSize);
pix.fill(TQt::magenta); // Watch for incoming hacks
TQPainter painter(&pix);
painter.setFont(font);
// Outline black, background white
painter.setPen(TQt::black);
painter.setBrush(background);
// roundRect is annoying in that the four "pies" in each corner aren't
// circular, they're elliptical. Try to make the radii force it circular
// again.
painter.drawRoundRect(pix.rect(), 75 * pix.height() / pix.width(), 75);
// Alias better names for some constants.
int textLeft = height / 2;
// Draw text
painter.setPen(TQt::black);
painter.drawText(textLeft, height / 4, size.width(), size.height(), 0, text);
TQImage overlay(pix.convertToImage());
// The images should have the same size, copy pixels from overlay to the
// bottom unless the pixel is called magenta. The pixels we don't copy
// are transparent in the TQImage, and will remain transparent when
// converted to a TQPixmap.
for(int i = 0; i < image.width(); ++i)
for(int j = 0; j < image.height(); ++j) {
if(TQColor(overlay.pixel(i, j)) != TQt::magenta)
image.setPixel(i, j, overlay.pixel(i, j));
}
pix.convertFromImage(image);
return pix;
}
} // DragSupport