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| 1 | +#include "qgslayertreegroup.h" |
| 2 | + |
| 3 | +#include "qgslayertree.h" |
| 4 | +#include "qgslayertreeutils.h" |
| 5 | + |
| 6 | +QgsLayerTreeGroup::QgsLayerTreeGroup(const QString& name, Qt::CheckState checked) |
| 7 | + : QgsLayerTreeNode(NodeGroup) |
| 8 | + , mName(name) |
| 9 | + , mChecked(checked) |
| 10 | + , mChangingChildVisibility(false) |
| 11 | +{ |
| 12 | +} |
| 13 | + |
| 14 | +QgsLayerTreeGroup::QgsLayerTreeGroup(const QgsLayerTreeGroup& other) |
| 15 | + : QgsLayerTreeNode(other) |
| 16 | + , mName(other.mName) |
| 17 | + , mChecked(other.mChecked) |
| 18 | + , mChangingChildVisibility(false) |
| 19 | +{ |
| 20 | +} |
| 21 | + |
| 22 | + |
| 23 | +QgsLayerTreeGroup* QgsLayerTreeGroup::addGroup(const QString &name) |
| 24 | +{ |
| 25 | + QgsLayerTreeGroup* grp = new QgsLayerTreeGroup(name); |
| 26 | + addChildNode( grp ); |
| 27 | + return grp; |
| 28 | +} |
| 29 | + |
| 30 | +QgsLayerTreeLayer*QgsLayerTreeGroup::insertLayer(int index, QgsMapLayer* layer) |
| 31 | +{ |
| 32 | + QgsLayerTreeLayer* ll = new QgsLayerTreeLayer(layer); |
| 33 | + insertChildNode( index, ll ); |
| 34 | + return ll; |
| 35 | +} |
| 36 | + |
| 37 | +QgsLayerTreeLayer* QgsLayerTreeGroup::addLayer(QgsMapLayer* layer) |
| 38 | +{ |
| 39 | + QgsLayerTreeLayer* ll = new QgsLayerTreeLayer(layer); |
| 40 | + addChildNode( ll ); |
| 41 | + return ll; |
| 42 | +} |
| 43 | + |
| 44 | +void QgsLayerTreeGroup::connectToChildNode(QgsLayerTreeNode* node) |
| 45 | +{ |
| 46 | + if (QgsLayerTree::isLayer(node)) |
| 47 | + { |
| 48 | + // TODO: this could be handled directly by LayerTreeLayer by listening to QgsMapLayerRegistry... |
| 49 | + //QgsLayerTreeLayer* nodeLayer = QgsLayerTree::toLayer(node); |
| 50 | + //connect(nodeLayer->layer(), SIGNAL(destroyed()), this, SLOT(layerDestroyed())); |
| 51 | + } |
| 52 | + |
| 53 | + connect(node, SIGNAL(visibilityChanged(Qt::CheckState)), this, SLOT(updateVisibilityFromChildren())); |
| 54 | + // forward the signal towards the root |
| 55 | + connect(node, SIGNAL(customPropertyChanged(QgsLayerTreeNode*,QString)), this, SIGNAL(customPropertyChanged(QgsLayerTreeNode*,QString))); |
| 56 | +} |
| 57 | + |
| 58 | +void QgsLayerTreeGroup::insertChildNode(int index, QgsLayerTreeNode* node) |
| 59 | +{ |
| 60 | + QList<QgsLayerTreeNode*> nodes; |
| 61 | + nodes << node; |
| 62 | + insertChildNodes(index, nodes); |
| 63 | +} |
| 64 | + |
| 65 | +void QgsLayerTreeGroup::insertChildNodes(int index, QList<QgsLayerTreeNode*> nodes) |
| 66 | +{ |
| 67 | + // low-level insert |
| 68 | + insertChildren(index, nodes); |
| 69 | + |
| 70 | + foreach (QgsLayerTreeNode* node, nodes) |
| 71 | + connectToChildNode(node); |
| 72 | + |
| 73 | + updateVisibilityFromChildren(); |
| 74 | +} |
| 75 | + |
| 76 | +void QgsLayerTreeGroup::addChildNode(QgsLayerTreeNode* node) |
| 77 | +{ |
| 78 | + insertChildNode(-1, node); |
| 79 | +} |
| 80 | + |
| 81 | +void QgsLayerTreeGroup::removeChildNode(QgsLayerTreeNode *node) |
| 82 | +{ |
| 83 | + int i = mChildren.indexOf(node); |
| 84 | + if (i >= 0) |
| 85 | + removeChildAt(i); |
| 86 | +} |
| 87 | + |
| 88 | +void QgsLayerTreeGroup::removeLayer(QgsMapLayer* layer) |
| 89 | +{ |
| 90 | + foreach (QgsLayerTreeNode* child, mChildren) |
| 91 | + { |
| 92 | + if (QgsLayerTree::isLayer(child)) |
| 93 | + { |
| 94 | + QgsLayerTreeLayer* childLayer = QgsLayerTree::toLayer(child); |
| 95 | + if (childLayer->layer() == layer) |
| 96 | + { |
| 97 | + removeChildAt(mChildren.indexOf(child)); |
| 98 | + break; |
| 99 | + } |
| 100 | + } |
| 101 | + } |
| 102 | +} |
| 103 | + |
| 104 | +void QgsLayerTreeGroup::removeChildren(int from, int count) |
| 105 | +{ |
| 106 | + removeChildrenRange(from, count); |
| 107 | + |
| 108 | + updateVisibilityFromChildren(); |
| 109 | +} |
| 110 | + |
| 111 | +void QgsLayerTreeGroup::removeAllChildren() |
| 112 | +{ |
| 113 | + removeChildren(0, mChildren.count()); |
| 114 | +} |
| 115 | + |
| 116 | +QgsLayerTreeLayer *QgsLayerTreeGroup::findLayer(const QString& layerId) |
| 117 | +{ |
| 118 | + foreach (QgsLayerTreeNode* child, mChildren) |
| 119 | + { |
| 120 | + if (QgsLayerTree::isLayer(child)) |
| 121 | + { |
| 122 | + QgsLayerTreeLayer* childLayer = QgsLayerTree::toLayer(child); |
| 123 | + if (childLayer->layerId() == layerId) |
| 124 | + return childLayer; |
| 125 | + } |
| 126 | + else if (QgsLayerTree::isGroup(child)) |
| 127 | + { |
| 128 | + QgsLayerTreeLayer* res = QgsLayerTree::toGroup(child)->findLayer(layerId); |
| 129 | + if (res) |
| 130 | + return res; |
| 131 | + } |
| 132 | + } |
| 133 | + return 0; |
| 134 | +} |
| 135 | + |
| 136 | +QList<QgsLayerTreeLayer*> QgsLayerTreeGroup::findLayers() const |
| 137 | +{ |
| 138 | + QList<QgsLayerTreeLayer*> list; |
| 139 | + foreach (QgsLayerTreeNode* child, mChildren) |
| 140 | + { |
| 141 | + if (QgsLayerTree::isLayer(child)) |
| 142 | + list << QgsLayerTree::toLayer(child); |
| 143 | + else if (QgsLayerTree::isGroup(child)) |
| 144 | + list << QgsLayerTree::toGroup(child)->findLayers(); |
| 145 | + } |
| 146 | + return list; |
| 147 | +} |
| 148 | + |
| 149 | +QgsLayerTreeGroup* QgsLayerTreeGroup::findGroup(const QString& name) |
| 150 | +{ |
| 151 | + foreach (QgsLayerTreeNode* child, mChildren) |
| 152 | + { |
| 153 | + if (QgsLayerTree::isGroup(child)) |
| 154 | + { |
| 155 | + QgsLayerTreeGroup* childGroup = QgsLayerTree::toGroup(child); |
| 156 | + if (childGroup->name() == name) |
| 157 | + return childGroup; |
| 158 | + else |
| 159 | + { |
| 160 | + QgsLayerTreeGroup* grp = childGroup->findGroup(name); |
| 161 | + if (grp) |
| 162 | + return grp; |
| 163 | + } |
| 164 | + } |
| 165 | + } |
| 166 | + return 0; |
| 167 | +} |
| 168 | + |
| 169 | +QgsLayerTreeGroup* QgsLayerTreeGroup::readXML(QDomElement& element) |
| 170 | +{ |
| 171 | + if (element.tagName() != "layer-tree-group") |
| 172 | + return 0; |
| 173 | + |
| 174 | + QString name = element.attribute("name"); |
| 175 | + bool isExpanded = (element.attribute("expanded", "1") == "1"); |
| 176 | + Qt::CheckState checked = QgsLayerTreeUtils::checkStateFromXml(element.attribute("checked")); |
| 177 | + |
| 178 | + QgsLayerTreeGroup* groupNode = new QgsLayerTreeGroup(name, checked); |
| 179 | + groupNode->setExpanded(isExpanded); |
| 180 | + |
| 181 | + groupNode->readCommonXML(element); |
| 182 | + |
| 183 | + groupNode->readChildrenFromXML(element); |
| 184 | + |
| 185 | + return groupNode; |
| 186 | +} |
| 187 | + |
| 188 | +void QgsLayerTreeGroup::writeXML(QDomElement& parentElement) |
| 189 | +{ |
| 190 | + QDomDocument doc = parentElement.ownerDocument(); |
| 191 | + QDomElement elem = doc.createElement("layer-tree-group"); |
| 192 | + elem.setAttribute("name", mName); |
| 193 | + elem.setAttribute("expanded", mExpanded ? "1" : "0"); |
| 194 | + elem.setAttribute("checked", QgsLayerTreeUtils::checkStateToXml(mChecked)); |
| 195 | + |
| 196 | + writeCommonXML(elem); |
| 197 | + |
| 198 | + foreach (QgsLayerTreeNode* node, mChildren) |
| 199 | + node->writeXML(elem); |
| 200 | + |
| 201 | + parentElement.appendChild(elem); |
| 202 | +} |
| 203 | + |
| 204 | +void QgsLayerTreeGroup::readChildrenFromXML(QDomElement& element) |
| 205 | +{ |
| 206 | + QDomElement childElem = element.firstChildElement(); |
| 207 | + while (!childElem.isNull()) |
| 208 | + { |
| 209 | + QgsLayerTreeNode* newNode = QgsLayerTreeNode::readXML(childElem); |
| 210 | + if (newNode) |
| 211 | + addChildNode(newNode); |
| 212 | + |
| 213 | + childElem = childElem.nextSiblingElement(); |
| 214 | + } |
| 215 | +} |
| 216 | + |
| 217 | +QString QgsLayerTreeGroup::dump() const |
| 218 | +{ |
| 219 | + QString header = QString( "GROUP: %1 visible=%2 expanded=%3\n" ).arg( name() ).arg( mChecked ).arg( mExpanded ); |
| 220 | + QStringList childrenDump; |
| 221 | + foreach (QgsLayerTreeNode* node, mChildren) |
| 222 | + childrenDump << node->dump().split( "\n" ); |
| 223 | + for (int i = 0; i < childrenDump.count(); ++i) |
| 224 | + childrenDump[i].prepend( " " ); |
| 225 | + return header + childrenDump.join( "\n" ); |
| 226 | +} |
| 227 | + |
| 228 | +QgsLayerTreeNode* QgsLayerTreeGroup::clone() const |
| 229 | +{ |
| 230 | + return new QgsLayerTreeGroup(*this); |
| 231 | +} |
| 232 | + |
| 233 | +void QgsLayerTreeGroup::setVisible(Qt::CheckState state) |
| 234 | +{ |
| 235 | + if (mChecked == state) |
| 236 | + return; |
| 237 | + |
| 238 | + mChecked = state; |
| 239 | + emit visibilityChanged(state); |
| 240 | + |
| 241 | + if (mChecked == Qt::Unchecked || mChecked == Qt::Checked) |
| 242 | + { |
| 243 | + mChangingChildVisibility = true; // guard against running again setVisible() triggered from children |
| 244 | + |
| 245 | + // update children to have the correct visibility |
| 246 | + foreach (QgsLayerTreeNode* child, mChildren) |
| 247 | + { |
| 248 | + if (QgsLayerTree::isGroup(child)) |
| 249 | + QgsLayerTree::toGroup(child)->setVisible(mChecked); |
| 250 | + else if (QgsLayerTree::isLayer(child)) |
| 251 | + QgsLayerTree::toLayer(child)->setVisible(mChecked == Qt::Checked); |
| 252 | + } |
| 253 | + |
| 254 | + mChangingChildVisibility = false; |
| 255 | + } |
| 256 | +} |
| 257 | + |
| 258 | +QStringList QgsLayerTreeGroup::childLayerIds() const |
| 259 | +{ |
| 260 | + QStringList lst; |
| 261 | + foreach (QgsLayerTreeNode* child, mChildren) |
| 262 | + { |
| 263 | + if (QgsLayerTree::isGroup(child)) |
| 264 | + lst << QgsLayerTree::toGroup(child)->childLayerIds(); |
| 265 | + else if (QgsLayerTree::isLayer(child)) |
| 266 | + lst << QgsLayerTree::toLayer(child)->layerId(); |
| 267 | + } |
| 268 | + return lst; |
| 269 | +} |
| 270 | + |
| 271 | + |
| 272 | +void QgsLayerTreeGroup::layerDestroyed() |
| 273 | +{ |
| 274 | + QgsMapLayer* layer = static_cast<QgsMapLayer*>(sender()); |
| 275 | + removeLayer(layer); |
| 276 | +} |
| 277 | + |
| 278 | +void QgsLayerTreeGroup::updateVisibilityFromChildren() |
| 279 | +{ |
| 280 | + if (mChangingChildVisibility) |
| 281 | + return; |
| 282 | + |
| 283 | + if (mChildren.count() == 0) |
| 284 | + return; |
| 285 | + |
| 286 | + bool hasVisible = false, hasHidden = false; |
| 287 | + |
| 288 | + foreach (QgsLayerTreeNode* child, mChildren) |
| 289 | + { |
| 290 | + if (QgsLayerTree::isLayer(child)) |
| 291 | + { |
| 292 | + bool layerVisible = QgsLayerTree::toLayer(child)->isVisible(); |
| 293 | + if (layerVisible) hasVisible = true; |
| 294 | + if (!layerVisible) hasHidden = true; |
| 295 | + } |
| 296 | + else if (QgsLayerTree::isGroup(child)) |
| 297 | + { |
| 298 | + Qt::CheckState state = QgsLayerTree::toGroup(child)->isVisible(); |
| 299 | + if (state == Qt::Checked || state == Qt::PartiallyChecked) hasVisible = true; |
| 300 | + if (state == Qt::Unchecked || state == Qt::PartiallyChecked) hasHidden = true; |
| 301 | + } |
| 302 | + } |
| 303 | + |
| 304 | + Qt::CheckState newState; |
| 305 | + if (hasVisible && !hasHidden) |
| 306 | + newState = Qt::Checked; |
| 307 | + else if (hasHidden && !hasVisible) |
| 308 | + newState = Qt::Unchecked; |
| 309 | + else |
| 310 | + newState = Qt::PartiallyChecked; |
| 311 | + |
| 312 | + setVisible(newState); |
| 313 | +} |
| 314 | + |
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