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# ktabctl.cpp

    00001 /* This file is part of the KDE libraries
    00002     Copyright (C) 1997 Alexander Sanda (alex@darkstar.ping.at)
    00003
    00004     This library 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 library 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 library; see the file COPYING.LIB.  If not, write to
    00016     the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00017     Boston, MA 02111-1307, USA.
    00018 */
    00019
    00027 #include <qtabbar.h>
    00028 #include <qpushbutton.h>
    00029 #include <qpainter.h>
    00030 #include <qpixmap.h>
    00031
    00032 #include "ktabctl.h"
    00033
    00034 KTabCtl::KTabCtl(QWidget *parent, const char *name)
    00035     : QWidget(parent, name)
    00036 {
    00037     tabs = new QTabBar(this, "_tabbar");
    00038     connect(tabs, SIGNAL(selected(int)), this, SLOT(showTab(int)));
    00039     tabs->move(2, 1);
    00040
    00041     blBorder = true;
    00042
    00043 }
    00044
    00045 KTabCtl::~KTabCtl()
    00046 {
    00047     delete tabs;
    00048 }
    00049
    00050 void KTabCtl::resizeEvent(QResizeEvent *)
    00051 {
    00052     int i;
    00053     QRect r = getChildRect();
    00054
    00055     if (tabs) {
    00056         for (i=0; i<(int)pages.size(); i++) {
    00057             pages[i]->setGeometry(r);
    00058         }
    00059         if( ( tabs->shape() == QTabBar::RoundedBelow ) ||
    00060             ( tabs->shape() == QTabBar::TriangularBelow ) ) {
    00061             tabs->move( 0, height()-tabs->height()-4 );
    00062         }
    00063     }
    00064 }
    00065
    00066 void KTabCtl::setFont(const QFont & font)
    00067 {
    00068     QFont f(font);
    00069     f.setWeight(QFont::Light);
    00070     QWidget::setFont(f);
    00071
    00072     setSizes();
    00073 }
    00074
    00075 void KTabCtl::setTabFont(const QFont & font)
    00076 {
    00077     QFont f(font);
    00078 //    f.setWeight(QFont::Light);
    00079     tabs->setFont(f);
    00080
    00081     setSizes();
    00082 }
    00083
    00084 void KTabCtl::show()
    00085 {
    00086     unsigned int i;
    00087
    00088     if(isVisible())
    00089     return;
    00090
    00091     setSizes();
    00092
    00093     for(i = 0; i < pages.size(); i++)
    00094     pages[i]->hide();
    00095
    00096     QResizeEvent r(size(), size());
    00097     resizeEvent(&r);
    00098
    00099     QWidget::show();
    00100 }
    00101
    00102 bool KTabCtl::isTabEnabled(const QString& name)
    00103 {
    00104     unsigned int i;
    00105
    00106     for(i = 0; i < pages.size(); i++)
    00107     if (QString::fromLatin1(pages[i]->name()) == name)
    00108         return tabs->isTabEnabled(i);   /* return the enabled status */
    00109     return false;     /* tab does not exist */
    00110 }
    00111
    00112 void KTabCtl::setTabEnabled(const QString& name, bool state)
    00113 {
    00114     unsigned i;
    00115
    00116     if (name.isEmpty())
    00117         return;
    00118
    00119     for (i = 0; i < pages.size(); i++)
    00120     if (QString::fromLatin1(pages[i]->name()) == name)
    00121         tabs->setTabEnabled(i, state);
    00122 }
    00123
    00124 void KTabCtl::setSizes()
    00125 {
    00126     unsigned i;
    00127
    00128     QSize min(tabs->sizeHint());    /* the minimum required size for the tabbar */
    00129     tabs->resize(min);         /* make sure that the tabbar does not require more space than actually needed. */
    00130
    00131
    00132     QSize max(QCOORD_MAX,QCOORD_MAX);
    00133     //int th = min.height();          /* the height of the tabbar itself (without pages and stuff) */
    00134
    00135     for (i = 0; i < pages.size(); i++) {
    00136
    00137         /*
    00138          * check the actual minimum and maximum sizes
    00139          */
    00140
    00141     if (pages[i]->maximumSize().height() < max.height())
    00142         max.setHeight(pages[i]->maximumSize().height());
    00143     if (pages[i]->maximumSize().width() < max.width())
    00144         max.setWidth( pages[i]->maximumSize().width());
    00145     if ( pages[i]->minimumSize().height() > min.height())
    00146         min.setHeight( pages[i]->minimumSize().height());
    00147     if ( pages[i]->minimumSize().width() > min.width())
    00148         min.setWidth( pages[i]->minimumSize().width());
    00149     }
    00150
    00151     // BL: min and max are sizes of children, not tabcontrol
    00152     // min.setHeight(min.height() + th);
    00153
    00154     if (max.width() < min.width())
    00155     max.setWidth(min.width());
    00156     if (max.height() < min.height())
    00157     max.setHeight(min.height());
    00158
    00159     /*
    00160      * now, apply the calculated size values to all of the pages
    00161      */
    00162
    00163     for( i=0; i<(uint)pages.size(); i++ ) {
    00164     pages[i]->setMinimumSize(min);
    00165     pages[i]->setMaximumSize(max);
    00166     }
    00167
    00168
    00169     // BL: set minimum size of tabcontrol
    00170     setMinimumSize(min.width()+4, min.height()+tabs->height()+4);
    00171
    00172     /*
    00173      * generate a resizeEvent, if we're visible
    00174      */
    00175
    00176     if(isVisible()) {
    00177     QResizeEvent r(size(), size());
    00178     resizeEvent(&r);
    00179     }
    00180 }
    00181
    00182 void KTabCtl::setBorder( bool state )
    00183 {
    00184     blBorder = state;
    00185 }
    00186
    00187 void KTabCtl::setShape( QTabBar::Shape shape )
    00188 {
    00189     tabs->setShape( shape );
    00190 }
    00191
    00192 QSize
    00193 KTabCtl::sizeHint() const
    00194 {
    00195     /* desired size of the tabbar */
    00196     QSize hint(tabs->sizeHint());
    00197
    00198     /* overall desired size of all pages */
    00199     QSize pageHint;
    00200     for (unsigned int i = 0; i < pages.size(); i++)
    00201     {
    00202         QSize sizeI(pages[i]->sizeHint());
    00203
    00204         if (sizeI.isValid())
    00205         {
    00206             /* only pages with valid size are used */
    00207             if (sizeI.width() > pageHint.width())
    00208                 pageHint.setWidth(sizeI.width());
    00209
    00210             if (sizeI.height() > pageHint.height())
    00211                 pageHint.setHeight(sizeI.height());
    00212         }
    00213     }
    00214
    00215     if (pageHint.isValid())
    00216     {
    00217         /* use maximum of width of tabbar and pages */
    00218         if (pageHint.width() > hint.width())
    00219             hint.setWidth(pageHint.width());
    00220
    00221         /* heights must just be added */
    00222         hint.setHeight(hint.height() + pageHint.height());
    00223
    00224         /* 1999-09-18: Espen Sand
    00225            I cannot get the size to be correct unless the total
    00226            border size is included: ie 2*2 pixels.
    00227         */
    00228         return (hint + QSize(4,4));
    00229     }
    00230
    00231     /*
    00232      * If not at least a one page has a valid sizeHint we have to return
    00233      * an invalid size as well.
    00234      */
    00235     return (pageHint);
    00236 }
    00237
    00238 void KTabCtl::paintEvent(QPaintEvent *)
    00239 {
    00240     if (!tabs)
    00241     return;
    00242
    00243     if( !blBorder )
    00244         return;
    00245
    00246     QPainter p;
    00247     p.begin(this);
    00248
    00249     int y0 = getChildRect().top() - 1;
    00250     int y1 = getChildRect().bottom() + 2;
    00251     int x1 = getChildRect().right() + 2;
    00252     int x0 = getChildRect().left() - 1;
    00253
    00254     p.setPen(colorGroup().light());
    00255     p.drawLine(x0, y0 - 1, x1 - 1, y0 - 1);      /* 1st top line */
    00256     p.setPen(colorGroup().midlight());
    00257     p.drawLine(x0, y0, x1 - 1, y0);      /* 2nd top line */
    00258     p.setPen(colorGroup().light());
    00259     p.drawLine(x0, y0 + 1, x0, y1);      /* left line */
    00260     p.setPen(black);
    00261     p.drawLine(x1, y1, x0, y1);          /* bottom line */
    00262     p.drawLine(x1, y1 - 1, x1, y0);
    00263     p.setPen(colorGroup().dark());
    00264     p.drawLine(x0 + 1, y1 - 1, x1 - 1, y1 - 1);  /* bottom */
    00265     p.drawLine(x1 - 1, y1 - 2, x1 - 1, y0 + 1);
    00266     p.end();
    00267 }
    00268
    00269 /*
    00270  * return the client rect. This is the maximum size for any child
    00271  * widget (page).
    00272  */
    00273
    00274 QRect KTabCtl::getChildRect() const
    00275 {
    00276     if( ( tabs->shape() == QTabBar::RoundedBelow ) ||
    00277         ( tabs->shape() == QTabBar::TriangularBelow ) ) {
    00278         return QRect(2, 1, width() - 4,
    00279              height() - tabs->height() - 4);
    00280     } else {
    00281         return QRect(2, tabs->height() + 1, width() - 4,
    00282              height() - tabs->height() - 4);
    00283     }
    00284 }
    00285
    00286 /*
    00287  * show a single page, depending on the selected tab
    00288  * emit tabSelected(new_pagenumber) BEFORE the page is shown
    00289  */
    00290
    00291 void KTabCtl::showTab(int i)
    00292 {
    00293     unsigned int j;
    00294     for (j = 0; j < pages.size(); j++) {
    00295       if (j != (unsigned)i) {
    00296         pages[j]->hide();
    00297       }
    00298     }
    00299
    00300     if((unsigned)i < pages.size()) {
    00301         emit(tabSelected(i));
    00302         if( pages.size() >= 2 ) {
    00303             pages[i]->raise();
    00304         }
    00305         tabs->setCurrentTab(i);
    00306         pages[i]->setGeometry(getChildRect());
    00307         pages[i]->show();
    00308     }
    00309 }
    00310
    00311 /*
    00312  * add a tab to the control. This tab will manage the given Widget w.
    00313  * in most cases, w will be a QWidget and will only act as parent for the
    00314  * actual widgets on this page
    00315  * NOTE: w is not required to be of class QWidget, but expect strange results with
    00316  * other types of widgets
    00317  */
    00318
    00319 void KTabCtl::addTab(QWidget *w, const QString& name)
    00320 {
    00321     QTab *t = new QTab();
    00322     t->setText( name );
    00323     t->setEnabled( true );
    00324     int id = tabs->addTab(t);   /* add the tab itself to the tabbar */
    00325     if (id == (int)pages.size()) {
    00326     pages.resize(id + 1);
    00327         pages[id] = w;          /* remember the widget to manage by this tab */
    00328     }
    00329     // BL: compute sizes
    00330     setSizes();
    00331 }
    00332
    00333 void KTabCtl::virtual_hook( int, void* )
    00334 { /*BASE::virtual_hook( id, data );*/ }
    00335
    00336 #include "ktabctl.moc"

This file is part of the documentation for kdeui Library Version 3.4.1.
Documentation copyright © 1996-2004 the KDE developers.
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