simplenodeselector.cpp
00001 /* 00002 This file is part of Akregator. 00003 00004 Copyright (C) 2005 Frank Osterfeld <frank.osterfeld at kdemail.net> 00005 00006 This program is free software; you can redistribute it and/or modify 00007 it under the terms of the GNU General Public License as published by 00008 the Free Software Foundation; either version 2 of the License, or 00009 (at your option) any later version. 00010 00011 This program is distributed in the hope that it will be useful, 00012 but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 GNU General Public License for more details. 00015 00016 You should have received a copy of the GNU General Public License 00017 along with this program; if not, write to the Free Software 00018 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 00019 00020 As a special exception, permission is given to link this program 00021 with any edition of TQt, and distribute the resulting executable, 00022 without including the source code for TQt in the source distribution. 00023 */ 00024 00025 #include "feedlist.h" 00026 #include "folder.h" 00027 #include "simplenodeselector.h" 00028 #include "treenode.h" 00029 #include "treenodevisitor.h" 00030 00031 #include <klistview.h> 00032 #include <klocale.h> 00033 00034 #include <tqlayout.h> 00035 #include <tqmap.h> 00036 #include <tqwidget.h> 00037 00038 namespace Akregator 00039 { 00040 00041 class SelectNodeDialog::SelectNodeDialogPrivate 00042 { 00043 public: 00044 SimpleNodeSelector* widget; 00045 }; 00046 00047 SelectNodeDialog::SelectNodeDialog(FeedList* feedList, TQWidget* parent, char* name) : 00048 KDialogBase(parent, name, true, i18n("Select Feed or Folder"), 00049 KDialogBase::Ok|KDialogBase::Cancel, KDialogBase::Ok, true), d(new SelectNodeDialogPrivate) 00050 { 00051 d->widget = new SimpleNodeSelector(feedList, this); 00052 00053 connect(d->widget, TQT_SIGNAL(signalNodeSelected(TreeNode*)), this, TQT_SLOT(slotNodeSelected(TreeNode*))); 00054 00055 setMainWidget(d->widget); 00056 enableButtonOK(false); 00057 } 00058 00059 SelectNodeDialog::~SelectNodeDialog() 00060 { 00061 delete d; 00062 d = 0; 00063 } 00064 00065 TreeNode* SelectNodeDialog::selectedNode() const 00066 { 00067 return d->widget->selectedNode(); 00068 } 00069 00070 void SelectNodeDialog::slotSelectNode(TreeNode* node) 00071 { 00072 d->widget->slotSelectNode(node); 00073 } 00074 00075 void SelectNodeDialog::slotNodeSelected(TreeNode* node) 00076 { 00077 enableButtonOK(node != 0); 00078 } 00079 00080 00081 class SimpleNodeSelector::SimpleNodeSelectorPrivate 00082 { 00083 public: 00084 KListView* view; 00085 FeedList* list; 00086 NodeVisitor* visitor; 00087 TQMap<TreeNode*,TQListViewItem*> nodeToItem; 00088 TQMap<TQListViewItem*, TreeNode*> itemToNode; 00089 }; 00090 00091 class SimpleNodeSelector::NodeVisitor : public TreeNodeVisitor 00092 { 00093 public: 00094 00095 NodeVisitor(SimpleNodeSelector* view) : TreeNodeVisitor(), m_view(view) {} 00096 00097 void createItems(TreeNode* node) 00098 { 00099 node->accept(this); 00100 } 00101 00102 virtual bool visitFolder(Folder* node) 00103 { 00104 visitTreeNode(node); 00105 TQValueList<TreeNode*> children = node->children(); 00106 m_view->d->nodeToItem[node]->setExpandable(true); 00107 for (TQValueList<TreeNode*>::ConstIterator it = children.begin(); it != children.end(); ++it) 00108 createItems(*it); 00109 return true; 00110 } 00111 00112 virtual bool visitTreeNode(TreeNode* node) 00113 { 00114 TQListViewItem* pi = node->parent() ? m_view->d->nodeToItem[node->parent()] : 0; 00115 00116 KListViewItem* item = 0; 00117 if (pi != 0) 00118 item = new KListViewItem(pi, node->title()); 00119 else 00120 item = new KListViewItem(m_view->d->view, node->title()); 00121 item->setExpandable(false); 00122 m_view->d->nodeToItem.insert(node, item); 00123 m_view->d->itemToNode.insert(item, node); 00124 connect(node, TQT_SIGNAL(signalDestroyed(TreeNode*)), m_view, TQT_SLOT(slotNodeDestroyed(TreeNode*))); 00125 return true; 00126 } 00127 00128 private: 00129 00130 SimpleNodeSelector* m_view; 00131 }; 00132 00133 00134 SimpleNodeSelector::SimpleNodeSelector(FeedList* feedList, TQWidget* parent, const char* name) : TQWidget(parent, name), d(new SimpleNodeSelectorPrivate) 00135 { 00136 d->list = feedList; 00137 connect(feedList, TQT_SIGNAL(signalDestroyed(FeedList*)), this, TQT_SLOT(slotFeedListDestroyed(FeedList*))); 00138 00139 d->view = new KListView(this); 00140 d->view->setRootIsDecorated(true); 00141 d->view->addColumn(i18n("Feeds")); 00142 00143 connect(d->view, TQT_SIGNAL(selectionChanged(TQListViewItem*)), this, TQT_SLOT(slotItemSelected(TQListViewItem*))); 00144 00145 TQGridLayout* layout = new TQGridLayout(this, 1, 1); 00146 layout->addWidget(d->view, 0, 0); 00147 00148 d->visitor = new NodeVisitor(this); 00149 00150 d->visitor->createItems(d->list->rootNode()); 00151 d->nodeToItem[d->list->rootNode()]->setOpen(true); 00152 d->view->ensureItemVisible(d->nodeToItem[d->list->rootNode()]); 00153 } 00154 00155 SimpleNodeSelector::~SimpleNodeSelector() 00156 { 00157 delete d->visitor; 00158 delete d; 00159 d = 0; 00160 } 00161 00162 TreeNode* SimpleNodeSelector::selectedNode() const 00163 { 00164 return d->itemToNode[d->view->selectedItem()]; 00165 } 00166 00167 void SimpleNodeSelector::slotSelectNode(TreeNode* node) 00168 { 00169 TQListViewItem* item = d->nodeToItem[node]; 00170 if (item != 0) 00171 d->view->setSelected(item, true); 00172 } 00173 00174 void SimpleNodeSelector::slotFeedListDestroyed(FeedList* /*list*/) 00175 { 00176 d->nodeToItem.clear(); 00177 d->itemToNode.clear(); 00178 d->view->clear(); 00179 } 00180 00181 void SimpleNodeSelector::slotItemSelected(TQListViewItem* item) 00182 { 00183 emit signalNodeSelected(d->itemToNode[item]); 00184 } 00185 00186 void SimpleNodeSelector::slotNodeDestroyed(TreeNode* node) 00187 { 00188 if (d->nodeToItem.contains(node)) 00189 { 00190 TQListViewItem* item = d->nodeToItem[node]; 00191 d->nodeToItem.remove(node); 00192 d->itemToNode.remove(item); 00193 delete item; 00194 } 00195 } 00196 00197 } // namespace Akregator 00198 00199 #include "simplenodeselector.moc" 00200