kexi

kexiarrowtip.cpp

00001 /* This file is part of the KDE project
00002    Copyright (C) 2006 Jaroslaw Staniek <js@iidea.pl>
00003 
00004    This program is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Library General Public
00006    License as published by the Free Software Foundation; either
00007    version 2 of the License, or (at your option) any later version.
00008 
00009    This program is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Library General Public License for more details.
00013 
00014    You should have received a copy of the GNU Library General Public License
00015    along with this program; see the file COPYING.  If not, write to
00016    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00017  * Boston, MA 02110-1301, USA.
00018 */
00019 
00020 #include "kexiarrowtip.h"
00021 
00022 #include <qpixmap.h>
00023 #include <qbitmap.h>
00024 #include <qpainter.h>
00025 #include <qimage.h>
00026 #include <qtooltip.h>
00027 #include <qfont.h>
00028 #include <qfontmetrics.h>
00029 #include <qtimer.h>
00030 
00031 #include <kexiutils/utils.h>
00032 
00033 KexiArrowTip::KexiArrowTip(const QString& text, QWidget* parent)
00034  : KexiToolTip(text, parent)
00035  , m_opacity(0.0)
00036 {
00037     QPalette pal( palette() );
00038     QColorGroup cg(pal.active());
00039     cg.setColor(QColorGroup::Foreground, Qt::red);
00040     pal.setActive(cg);
00041     setPalette(pal);
00042 
00043     QFontMetrics fm(font());
00044     QSize sz(fm.boundingRect(m_value.toString()).size());
00045     sz += QSize(14, 10); //+margins
00046     m_arrowHeight = sz.height()/2;
00047     sz += QSize(0, m_arrowHeight); //+arrow height
00048     resize(sz);
00049 
00050     setAutoMask( false );
00051 
00052     //generate mask
00053     QPixmap maskPm(size());
00054     maskPm.fill( black );
00055     QPainter maskPainter(&maskPm);
00056     drawFrame(maskPainter);
00057     QImage maskImg( maskPm.convertToImage() );
00058     QBitmap bm;
00059     bm = maskImg.createHeuristicMask();
00060     setMask( bm );
00061 }
00062 
00063 KexiArrowTip::~KexiArrowTip()
00064 {
00065 }
00066 
00067 void KexiArrowTip::show()
00068 {
00069     if (isVisible())
00070         return;
00071 
00072     m_opacity = 0.0;
00073     setWindowOpacity(0.0);
00074     KexiToolTip::show();
00075     increaseOpacity();
00076 }
00077 
00078 void KexiArrowTip::hide()
00079 {
00080     if (!isVisible())
00081         return;
00082 
00083     decreaseOpacity();
00084 }
00085 
00086 void KexiArrowTip::increaseOpacity()
00087 {
00088     m_opacity += 0.10;
00089     setWindowOpacity(m_opacity);
00090     if (m_opacity < 1.0)
00091         QTimer::singleShot(25, this, SLOT(increaseOpacity()));
00092 }
00093 
00094 void KexiArrowTip::decreaseOpacity()
00095 {
00096     if (m_opacity<=0.0) {
00097         KexiToolTip::close();
00098         m_opacity = 0.0;
00099         return;
00100     }
00101     m_opacity -= 0.10;
00102     setWindowOpacity(m_opacity);
00103     QTimer::singleShot(25, this, SLOT(decreaseOpacity()));
00104 }
00105 
00106 bool KexiArrowTip::close ( bool alsoDelete )
00107 {
00108     if (!isVisible()) {
00109         return KexiToolTip::close(alsoDelete);
00110     }
00111     if (m_opacity>0.0)
00112         decreaseOpacity();
00113     else
00114         return KexiToolTip::close(alsoDelete);
00115     return m_opacity<=0.0;
00116 }
00117 
00118 void KexiArrowTip::drawContents(QPainter& p)
00119 {
00120     p.setPen( QPen(palette().active().foreground(), 1) );
00121     p.drawText(QRect(0,m_arrowHeight,width(),height()-m_arrowHeight), 
00122         Qt::AlignCenter, m_value.toString());
00123 }
00124 
00125 void KexiArrowTip::drawFrame(QPainter& p)
00126 {
00127     QPen pen(palette().active().foreground(), 1, Qt::SolidLine, Qt::SquareCap, Qt::MiterJoin);
00128     p.setPen( pen );
00129     /*
00130        /\
00131      +-  -----+
00132      |  text  |
00133      +--------+
00134     */
00135     //1st line
00136     const int arrowOffset = 5; //5 pixels to right
00137     QPointArray pa(8);
00138     pa.setPoint(0, 0, m_arrowHeight-1);
00139     pa.setPoint(1, 0, height()-1);
00140     pa.setPoint(2, width()-1, height()-1);
00141     pa.setPoint(3, width()-1, m_arrowHeight-1);
00142     pa.setPoint(4, arrowOffset+m_arrowHeight+m_arrowHeight-2, m_arrowHeight-1);
00143     pa.setPoint(5, arrowOffset+m_arrowHeight-1, 0);
00144     pa.setPoint(6, arrowOffset, m_arrowHeight-1);
00145     pa.setPoint(7, 0, m_arrowHeight-1);
00146     p.drawPolyline(pa);
00147     //-2nd, internal line
00148     pa.resize(12);
00149     pa.setPoint(0, 1, m_arrowHeight);
00150     pa.setPoint(1, 1, height()-2);
00151     pa.setPoint(2, width()-2, height()-2);
00152     pa.setPoint(3, width()-2, m_arrowHeight);
00153     pa.setPoint(4, arrowOffset+m_arrowHeight+m_arrowHeight-2, m_arrowHeight);
00154     pa.setPoint(5, arrowOffset+m_arrowHeight-1, 1);
00155     pa.setPoint(6, arrowOffset, m_arrowHeight);
00156     pa.setPoint(7, 0, m_arrowHeight);
00157     pa.setPoint(8, arrowOffset+1, m_arrowHeight);
00158     pa.setPoint(9, arrowOffset+m_arrowHeight-1, 2);
00159     pa.setPoint(10, arrowOffset+m_arrowHeight+m_arrowHeight-3, m_arrowHeight);
00160     pa.setPoint(11, width()-2, m_arrowHeight);
00161     p.drawPolyline(pa);
00162 }
00163 
00164 #include "kexiarrowtip.moc"
KDE Home | KDE Accessibility Home | Description of Access Keys