kexiarrowtip.cpp

/* This file is part of the KDE project
   Copyright (C) 2006 Jaroslaw Staniek <js@iidea.pl>
 
   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library 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
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this program; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
 
#include "kexiarrowtip.h"
 
#include <tqpixmap.h>
#include <tqbitmap.h>
#include <tqpainter.h>
#include <tqimage.h>
#include <tqtooltip.h>
#include <tqfont.h>
#include <tqfontmetrics.h>
#include <tqtimer.h>
 
#include <kexiutils/utils.h>
 
KexiArrowTip::KexiArrowTip(const TQString& text, TQWidget* parent)
 : KexiToolTip(text, parent)
 , m_opacity(0.0)
{
    TQPalette pal( palette() );
    TQColorGroup cg(pal.active());
    cg.setColor(TQColorGroup::Foreground, TQt::red);
    pal.setActive(cg);
    setPalette(pal);
 
    TQFontMetrics fm(font());
    TQSize sz(fm.boundingRect(m_value.toString()).size());
    sz += TQSize(14, 10); //+margins
    m_arrowHeight = sz.height()/2;
    sz += TQSize(0, m_arrowHeight); //+arrow height
    resize(sz);
 
    setAutoMask( false );
 
    //generate mask
    TQPixmap maskPm(size());
    maskPm.fill( black );
    TQPainter maskPainter(&maskPm);
    drawFrame(maskPainter);
    TQImage maskImg( maskPm.convertToImage() );
    TQBitmap bm;
    bm = maskImg.createHeuristicMask();
    setMask( bm );
}
 
KexiArrowTip::~KexiArrowTip()
{
}
 
void KexiArrowTip::show()
{
    if (isVisible())
        return;
 
    m_opacity = 0.0;
    setWindowOpacity(0.0);
    KexiToolTip::show();
    increaseOpacity();
}
 
void KexiArrowTip::hide()
{
    if (!isVisible())
        return;
 
    decreaseOpacity();
}
 
void KexiArrowTip::increaseOpacity()
{
    m_opacity += 0.10;
    setWindowOpacity(m_opacity);
    if (m_opacity < 1.0)
        TQTimer::singleShot(25, this, TQ_SLOT(increaseOpacity()));
}
 
void KexiArrowTip::decreaseOpacity()
{
    if (m_opacity<=0.0) {
        KexiToolTip::close();
        m_opacity = 0.0;
        return;
    }
    m_opacity -= 0.10;
    setWindowOpacity(m_opacity);
    TQTimer::singleShot(25, this, TQ_SLOT(decreaseOpacity()));
}
 
bool KexiArrowTip::close ( bool alsoDelete )
{
    if (!isVisible()) {
        return KexiToolTip::close(alsoDelete);
    }
    if (m_opacity>0.0)
        decreaseOpacity();
    else
        return KexiToolTip::close(alsoDelete);
    return m_opacity<=0.0;
}
 
void KexiArrowTip::drawContents(TQPainter& p)
{
    p.setPen( TQPen(palette().active().foreground(), 1) );
    p.drawText(TQRect(0,m_arrowHeight,width(),height()-m_arrowHeight), 
        TQt::AlignCenter, m_value.toString());
}
 
void KexiArrowTip::drawFrame(TQPainter& p)
{
    TQPen pen(palette().active().foreground(), 1, TQt::SolidLine, TQt::SquareCap, TQt::MiterJoin);
    p.setPen( pen );
    /*
       /\
     +-  -----+
     |  text  |
     +--------+
    */
    //1st line
    const int arrowOffset = 5; //5 pixels to right
    TQPointArray pa(8);
    pa.setPoint(0, 0, m_arrowHeight-1);
    pa.setPoint(1, 0, height()-1);
    pa.setPoint(2, width()-1, height()-1);
    pa.setPoint(3, width()-1, m_arrowHeight-1);
    pa.setPoint(4, arrowOffset+m_arrowHeight+m_arrowHeight-2, m_arrowHeight-1);
    pa.setPoint(5, arrowOffset+m_arrowHeight-1, 0);
    pa.setPoint(6, arrowOffset, m_arrowHeight-1);
    pa.setPoint(7, 0, m_arrowHeight-1);
    p.drawPolyline(pa);
    //-2nd, internal line
    pa.resize(12);
    pa.setPoint(0, 1, m_arrowHeight);
    pa.setPoint(1, 1, height()-2);
    pa.setPoint(2, width()-2, height()-2);
    pa.setPoint(3, width()-2, m_arrowHeight);
    pa.setPoint(4, arrowOffset+m_arrowHeight+m_arrowHeight-2, m_arrowHeight);
    pa.setPoint(5, arrowOffset+m_arrowHeight-1, 1);
    pa.setPoint(6, arrowOffset, m_arrowHeight);
    pa.setPoint(7, 0, m_arrowHeight);
    pa.setPoint(8, arrowOffset+1, m_arrowHeight);
    pa.setPoint(9, arrowOffset+m_arrowHeight-1, 2);
    pa.setPoint(10, arrowOffset+m_arrowHeight+m_arrowHeight-3, m_arrowHeight);
    pa.setPoint(11, width()-2, m_arrowHeight);
    p.drawPolyline(pa);
}
 
#include "kexiarrowtip.moc"