kdeprint Library API Documentation

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 }
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This file is part of the documentation for kdeprint Library Version 3.3.0.
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