treecombobox.cpp
/*
* This file is part of the KDE libraries
* Copyright (c) 2001 Michael Goffioul <kdeprint@swing.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License version 2 as published by the Free Software Foundation.
*
* This library 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 library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
**/
#include "treecombobox.h"
#include <qpainter.h>
TreeListBoxItem::TreeListBoxItem(QListBox *lb, const QPixmap& pix, const QString& txt, bool oneBlock)
: QListBoxPixmap(pix, txt)
{
if (oneBlock)
m_path = QStringList(txt);
else
m_path = QStringList::split('/', text(), false);
m_depth = m_path.count()-1;
m_child = m_next = m_parent = 0;
// insert into QListBox
if (m_depth == 0)
{
TreeListBoxItem *item = static_cast<TreeListBoxItem*>(lb->item(0));
while (item && item->m_next)
item = item->m_next;
lb->insertItem(this);
if (item)
item->m_next = this;
}
else
{
QString parentStr = txt.left(txt.length()-m_path[m_depth].length()-1);
TreeListBoxItem *parentItem = static_cast<TreeListBoxItem*>(lb->findItem(parentStr, Qt::ExactMatch));
if (!parentItem)
{
// parent not found, add parent first into QListBox
parentItem = new TreeListBoxItem(lb, QPixmap(), parentStr);
}
// search last "child" of the parent item, to put the new one
// at the end
TreeListBoxItem *childItem = static_cast<TreeListBoxItem*>(parentItem), *prevItem = 0;
while (childItem->next())
{
TreeListBoxItem *nextItem = static_cast<TreeListBoxItem*>(childItem->next());
if (nextItem->m_depth >= m_depth)
{
childItem = nextItem;
if (childItem->m_depth == m_depth)
prevItem = childItem;
}
else
break;
}
// eventually insert item
lb->insertItem(this, childItem);
m_parent = parentItem;
if (prevItem)
prevItem->m_next = this;
else
parentItem->m_child = this;
}
}
int TreeListBoxItem::width(const QListBox *lb) const
{
int w = m_depth * stepSize() + 2;
if (pixmap())
w += (pixmap()->width() + 2);
if (!m_path[m_depth].isEmpty())
w += (lb->fontMetrics().width(m_path[m_depth]) + 2);
return QMAX(w, QListBoxPixmap::width(lb));
}
void TreeListBoxItem::paint(QPainter *p)
{
if(!static_cast<TreeListBox*>(listBox())->m_painting)
{
QListBoxPixmap::paint(p);
return;
}
const QPixmap *pix = pixmap();
QRect r = p->viewport();
int h = height(listBox());
int xo = (m_depth * stepSize() + 2);
int yo = (pix ? (h-pix->height())/2 : 0);
if (m_depth > 0)
{
QPen oldPen = p->pen();
p->setPen(listBox()->colorGroup().mid());
TreeListBoxItem *item = this;
int s = xo-stepSize()/2;
p->drawLine(s, r.top(), s, h/2);
p->drawLine(s, h/2, s+stepSize()/2-2, h/2);
while (item->m_parent)
{
if (item->m_next)
p->drawLine(s, r.top(), s, h);
item = item->m_parent;
s -= stepSize();
}
p->setPen(oldPen);
}
if (pix)
{
p->drawPixmap(xo, yo, *pix);
xo += (pix->width() + 2);
}
p->drawText(xo, 0, r.width()-xo, height(listBox()), Qt::AlignLeft, m_path[m_depth]);
}
//-----------------------------------------------------------------------------------------
TreeListBox::TreeListBox(QWidget *parent, const char *name)
: QListBox(parent, name)
{
m_painting = false;
}
void TreeListBox::paintCell(QPainter *p, int row, int col)
{
m_painting = true;
QListBox::paintCell(p, row, col);
m_painting = false;
}
//-----------------------------------------------------------------------------------------
TreeComboBox::TreeComboBox(QWidget *parent, const char *name)
: QComboBox(parent, name)
{
m_listbox = new TreeListBox(this);
setListBox(m_listbox);
}
void TreeComboBox::insertItem(const QPixmap& pix, const QString& txt, bool oneBlock)
{
new TreeListBoxItem(m_listbox, pix, txt, oneBlock);
}
TreeListBoxItem
Class that represents a single object in the tree.
Definition: treecombobox.h:30
TreeListBox
Class for the listbox shown on popup.
Definition: treecombobox.h:50

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