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 <tdelistview.h> 00032 #include <tdelocale.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 TDEListView* 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 virtual ~NodeVisitor() {} 00097 00098 void createItems(TreeNode* node) 00099 { 00100 node->accept(this); 00101 } 00102 00103 virtual bool visitFolder(Folder* node) 00104 { 00105 visitTreeNode(node); 00106 TQValueList<TreeNode*> children = node->children(); 00107 m_view->d->nodeToItem[node]->setExpandable(true); 00108 for (TQValueList<TreeNode*>::ConstIterator it = children.begin(); it != children.end(); ++it) 00109 createItems(*it); 00110 return true; 00111 } 00112 00113 virtual bool visitTreeNode(TreeNode* node) 00114 { 00115 TQListViewItem* pi = node->parent() ? m_view->d->nodeToItem[node->parent()] : 0; 00116 00117 TDEListViewItem* item = 0; 00118 if (pi != 0) 00119 item = new TDEListViewItem(pi, node->title()); 00120 else 00121 item = new TDEListViewItem(m_view->d->view, node->title()); 00122 item->setExpandable(false); 00123 m_view->d->nodeToItem.insert(node, item); 00124 m_view->d->itemToNode.insert(item, node); 00125 connect(node, TQT_SIGNAL(signalDestroyed(TreeNode*)), m_view, TQT_SLOT(slotNodeDestroyed(TreeNode*))); 00126 return true; 00127 } 00128 00129 private: 00130 00131 SimpleNodeSelector* m_view; 00132 }; 00133 00134 00135 SimpleNodeSelector::SimpleNodeSelector(FeedList* feedList, TQWidget* parent, const char* name) : TQWidget(parent, name), d(new SimpleNodeSelectorPrivate) 00136 { 00137 d->list = feedList; 00138 connect(feedList, TQT_SIGNAL(signalDestroyed(FeedList*)), this, TQT_SLOT(slotFeedListDestroyed(FeedList*))); 00139 00140 d->view = new TDEListView(this); 00141 d->view->setRootIsDecorated(true); 00142 d->view->addColumn(i18n("Feeds")); 00143 00144 connect(d->view, TQT_SIGNAL(selectionChanged(TQListViewItem*)), this, TQT_SLOT(slotItemSelected(TQListViewItem*))); 00145 00146 TQGridLayout* layout = new TQGridLayout(this, 1, 1); 00147 layout->addWidget(d->view, 0, 0); 00148 00149 d->visitor = new NodeVisitor(this); 00150 00151 d->visitor->createItems(d->list->rootNode()); 00152 d->nodeToItem[d->list->rootNode()]->setOpen(true); 00153 d->view->ensureItemVisible(d->nodeToItem[d->list->rootNode()]); 00154 } 00155 00156 SimpleNodeSelector::~SimpleNodeSelector() 00157 { 00158 delete d->visitor; 00159 delete d; 00160 d = 0; 00161 } 00162 00163 TreeNode* SimpleNodeSelector::selectedNode() const 00164 { 00165 return d->itemToNode[d->view->selectedItem()]; 00166 } 00167 00168 void SimpleNodeSelector::slotSelectNode(TreeNode* node) 00169 { 00170 TQListViewItem* item = d->nodeToItem[node]; 00171 if (item != 0) 00172 d->view->setSelected(item, true); 00173 } 00174 00175 void SimpleNodeSelector::slotFeedListDestroyed(FeedList* /*list*/) 00176 { 00177 d->nodeToItem.clear(); 00178 d->itemToNode.clear(); 00179 d->view->clear(); 00180 } 00181 00182 void SimpleNodeSelector::slotItemSelected(TQListViewItem* item) 00183 { 00184 emit signalNodeSelected(d->itemToNode[item]); 00185 } 00186 00187 void SimpleNodeSelector::slotNodeDestroyed(TreeNode* node) 00188 { 00189 if (d->nodeToItem.contains(node)) 00190 { 00191 TQListViewItem* item = d->nodeToItem[node]; 00192 d->nodeToItem.remove(node); 00193 d->itemToNode.remove(item); 00194 delete item; 00195 } 00196 } 00197 00198 } // namespace Akregator 00199 00200 #include "simplenodeselector.moc" 00201