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# treecombobox.cpp

    00001 /*
    00002  *  This file is part of the KDE libraries
    00003  *  Copyright (c) 2001 Michael Goffioul <kdeprint@swing.be>
    00004  *
    00005  *  This library is free software; you can redistribute it and/or
    00006  *  modify it under the terms of the GNU Library General Public
    00007  *  License version 2 as published by the Free Software Foundation.
    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
    00020 #include "treecombobox.h"
    00021
    00022 #include <qpainter.h>
    00023
    00024 TreeListBoxItem::TreeListBoxItem(QListBox *lb, const QPixmap& pix, const QString& txt, bool oneBlock)
    00025     : QListBoxPixmap(pix, txt)
    00026 {
    00027     if (oneBlock)
    00028         m_path = QStringList(txt);
    00029     else
    00030         m_path = QStringList::split('/', text(), false);
    00031     m_depth = m_path.count()-1;
    00032     m_child = m_next = m_parent = 0;
    00033
    00034     // insert into QListBox
    00035     if (m_depth == 0)
    00036     {
    00037         TreeListBoxItem *item = static_cast<TreeListBoxItem*>(lb->item(0));
    00038         while (item && item->m_next)
    00039             item = item->m_next;
    00040         lb->insertItem(this);
    00041         if (item)
    00042             item->m_next = this;
    00043     }
    00044     else
    00045     {
    00046         QString parentStr = txt.left(txt.length()-m_path[m_depth].length()-1);
    00047         TreeListBoxItem *parentItem = static_cast<TreeListBoxItem*>(lb->findItem(parentStr, Qt::ExactMatch));
    00048         if (!parentItem)
    00049         {
    00050             // parent not found, add parent first into QListBox
    00051             parentItem = new TreeListBoxItem(lb, QPixmap(), parentStr);
    00052         }
    00053         // search last "child" of the parent item, to put the new one
    00054         // at the end
    00055         TreeListBoxItem *childItem = static_cast<TreeListBoxItem*>(parentItem), *prevItem = 0;
    00056         while (childItem->next())
    00057         {
    00058             TreeListBoxItem *nextItem = static_cast<TreeListBoxItem*>(childItem->next());
    00059             if (nextItem->m_depth >= m_depth)
    00060             {
    00061                 childItem = nextItem;
    00062                 if (childItem->m_depth == m_depth)
    00063                     prevItem = childItem;
    00064             }
    00065             else
    00066                 break;
    00067         }
    00068         // eventually insert item
    00069         lb->insertItem(this, childItem);
    00070         m_parent = parentItem;
    00071         if (prevItem)
    00072             prevItem->m_next = this;
    00073         else
    00074             parentItem->m_child = this;
    00075     }
    00076 }
    00077
    00078 int TreeListBoxItem::width(const QListBox *lb) const
    00079 {
    00080     int w = m_depth * stepSize() + 2;
    00081     if (pixmap())
    00082         w += (pixmap()->width() + 2);
    00083     if (!m_path[m_depth].isEmpty())
    00084         w += (lb->fontMetrics().width(m_path[m_depth]) + 2);
    00085     return QMAX(w, QListBoxPixmap::width(lb));
    00086 }
    00087
    00088 void TreeListBoxItem::paint(QPainter *p)
    00089 {
    00090     if(!static_cast<TreeListBox*>(listBox())->m_painting)
    00091     {
    00092         QListBoxPixmap::paint(p);
    00093         return;
    00094     }
    00095
    00096     const QPixmap   *pix = pixmap();
    00097     QRect   r = p->viewport();
    00098     int h = height(listBox());
    00099     int xo = (m_depth * stepSize() + 2);
    00100     int yo = (pix ? (h-pix->height())/2 : 0);
    00101
    00102     if (m_depth > 0)
    00103     {
    00104         QPen    oldPen = p->pen();
    00105         p->setPen(listBox()->colorGroup().mid());
    00106
    00107         TreeListBoxItem *item = this;
    00108         int s = xo-stepSize()/2;
    00109         p->drawLine(s, r.top(), s, h/2);
    00110         p->drawLine(s, h/2, s+stepSize()/2-2, h/2);
    00111         while (item->m_parent)
    00112         {
    00113             if (item->m_next)
    00114                 p->drawLine(s, r.top(), s, h);
    00115             item = item->m_parent;
    00116             s -= stepSize();
    00117         }
    00118
    00119         p->setPen(oldPen);
    00120     }
    00121     if (pix)
    00122     {
    00123         p->drawPixmap(xo, yo, *pix);
    00124         xo += (pix->width() + 2);
    00125     }
    00126     p->drawText(xo, 0, r.width()-xo, height(listBox()), Qt::AlignLeft, m_path[m_depth]);
    00127 }
    00128
    00129 //-----------------------------------------------------------------------------------------
    00130
    00131 TreeListBox::TreeListBox(QWidget *parent, const char *name)
    00132     : QListBox(parent, name)
    00133 {
    00134     m_painting = false;
    00135 }
    00136
    00137 void TreeListBox::paintCell(QPainter *p, int row, int col)
    00138 {
    00139     m_painting = true;
    00140     QListBox::paintCell(p, row, col);
    00141     m_painting = false;
    00142 }
    00143
    00144 //-----------------------------------------------------------------------------------------
    00145
    00146 TreeComboBox::TreeComboBox(QWidget *parent, const char *name)
    00147     : QComboBox(parent, name)
    00148 {
    00149     m_listbox = new TreeListBox(this);
    00150     setListBox(m_listbox);
    00151 }
    00152
    00153 void TreeComboBox::insertItem(const QPixmap& pix, const QString& txt, bool oneBlock)
    00154 {
    00155     new TreeListBoxItem(m_listbox, pix, txt, oneBlock);
    00156 }

This file is part of the documentation for kdeprint Library Version 3.4.1.
Documentation copyright © 1996-2004 the KDE developers.
Generated on Sat Jun 11 20:31:06 2005 by doxygen 1.4.1 written by Dimitri van Heesch, © 1997-2003