1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2015 The Qt Company Ltd. 4 ** Contact: http://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtGui module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see http://www.qt.io/terms-conditions. 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These rights are described in The Qt Company LGPL Exception 28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. 29 ** 30 ** GNU General Public License Usage 31 ** Alternatively, this file may be used under the terms of the GNU 32 ** General Public License version 3.0 as published by the Free Software 33 ** Foundation and appearing in the file LICENSE.GPL included in the 34 ** packaging of this file. Please review the following information to 35 ** ensure the GNU General Public License version 3.0 requirements will be 36 ** met: http://www.gnu.org/copyleft/gpl.html. 37 ** 38 ** $QT_END_LICENSE$ 39 ** 40 ****************************************************************************/ 41 42 #ifndef QHEADERVIEW_P_H 43 #define QHEADERVIEW_P_H 44 45 // 46 // W A R N I N G 47 // ------------- 48 // 49 // This file is not part of the Qt API. It exists purely as an 50 // implementation detail. This header file may change from version to 51 // version without notice, or even be removed. 52 // 53 // We mean it. 54 // 55 56 #include "private/qabstractitemview_p.h" 57 58 #ifndef QT_NO_ITEMVIEWS 59 60 #include "QtCore/qbitarray.h" 61 #include "QtGui/qapplication.h" 62 #include "QtGui/qlabel.h" 63 64 QT_BEGIN_NAMESPACE 65 66 class QHeaderViewPrivate: public QAbstractItemViewPrivate 67 { 68 Q_DECLARE_PUBLIC(QHeaderView) 69 70 public: 71 enum StateVersion { VersionMarker = 0xff }; 72 QHeaderViewPrivate()73 QHeaderViewPrivate() 74 : state(NoState), 75 offset(0), 76 sortIndicatorOrder(Qt::DescendingOrder), 77 sortIndicatorSection(0), 78 sortIndicatorShown(false), 79 lastPos(-1), 80 firstPos(-1), 81 originalSize(-1), 82 section(-1), 83 target(-1), 84 pressed(-1), 85 hover(-1), 86 length(0), 87 sectionCount(0), 88 movableSections(false), 89 clickableSections(false), 90 highlightSelected(false), 91 stretchLastSection(false), 92 cascadingResizing(false), 93 resizeRecursionBlock(false), 94 stretchSections(0), 95 contentsSections(0), 96 minimumSectionSize(-1), 97 lastSectionSize(0), 98 sectionIndicatorOffset(0), 99 sectionIndicator(0), 100 globalResizeMode(QHeaderView::Interactive) 101 {} 102 103 104 int lastVisibleVisualIndex() const; 105 int sectionHandleAt(int position); 106 void setupSectionIndicator(int section, int position); 107 void updateSectionIndicator(int section, int position); 108 void updateHiddenSections(int logicalFirst, int logicalLast); 109 void resizeSections(QHeaderView::ResizeMode globalMode, bool useGlobalMode = false); 110 void _q_sectionsRemoved(const QModelIndex &,int,int); 111 void _q_layoutAboutToBeChanged(); 112 void _q_layoutChanged(); 113 114 bool isSectionSelected(int section) const; 115 rowIntersectsSelection(int row)116 inline bool rowIntersectsSelection(int row) const { 117 return (selectionModel ? selectionModel->rowIntersectsSelection(row, root) : false); 118 } 119 columnIntersectsSelection(int column)120 inline bool columnIntersectsSelection(int column) const { 121 return (selectionModel ? selectionModel->columnIntersectsSelection(column, root) : false); 122 } 123 sectionIntersectsSelection(int logical)124 inline bool sectionIntersectsSelection(int logical) const { 125 return (orientation == Qt::Horizontal ? columnIntersectsSelection(logical) : rowIntersectsSelection(logical)); 126 } 127 isRowSelected(int row)128 inline bool isRowSelected(int row) const { 129 return (selectionModel ? selectionModel->isRowSelected(row, root) : false); 130 } 131 isColumnSelected(int column)132 inline bool isColumnSelected(int column) const { 133 return (selectionModel ? selectionModel->isColumnSelected(column, root) : false); 134 } 135 prepareSectionSelected()136 inline void prepareSectionSelected() { 137 if (!selectionModel || !selectionModel->hasSelection()) 138 sectionSelected.clear(); 139 else if (sectionSelected.count() != sectionCount * 2) 140 sectionSelected.fill(false, sectionCount * 2); 141 else sectionSelected.fill(false); 142 } 143 reverse()144 inline bool reverse() const { 145 return orientation == Qt::Horizontal && q_func()->isRightToLeft(); 146 } 147 logicalIndex(int visualIndex)148 inline int logicalIndex(int visualIndex) const { 149 return logicalIndices.isEmpty() ? visualIndex : logicalIndices.at(visualIndex); 150 } 151 visualIndex(int logicalIndex)152 inline int visualIndex(int logicalIndex) const { 153 return visualIndices.isEmpty() ? logicalIndex : visualIndices.at(logicalIndex); 154 } 155 setDefaultValues(Qt::Orientation o)156 inline void setDefaultValues(Qt::Orientation o) { 157 orientation = o; 158 defaultSectionSize = (o == Qt::Horizontal ? 100 159 : qMax(q_func()->minimumSectionSize(), 30)); 160 defaultAlignment = (o == Qt::Horizontal 161 ? Qt::Alignment(Qt::AlignCenter) 162 : Qt::AlignLeft|Qt::AlignVCenter); 163 } 164 isVisualIndexHidden(int visual)165 inline bool isVisualIndexHidden(int visual) const { 166 return !sectionHidden.isEmpty() && sectionHidden.at(visual); 167 } 168 setVisualIndexHidden(int visual,bool hidden)169 inline void setVisualIndexHidden(int visual, bool hidden) { 170 if (!sectionHidden.isEmpty()) sectionHidden.setBit(visual, hidden); 171 } 172 hasAutoResizeSections()173 inline bool hasAutoResizeSections() const { 174 return stretchSections || stretchLastSection || contentsSections; 175 } 176 177 QStyleOptionHeader getStyleOption() const; 178 invalidateCachedSizeHint()179 inline void invalidateCachedSizeHint() const { 180 cachedSizeHint = QSize(); 181 } 182 initializeIndexMapping()183 inline void initializeIndexMapping() const { 184 if (visualIndices.count() != sectionCount 185 || logicalIndices.count() != sectionCount) { 186 visualIndices.resize(sectionCount); 187 logicalIndices.resize(sectionCount); 188 for (int s = 0; s < sectionCount; ++s) { 189 visualIndices[s] = s; 190 logicalIndices[s] = s; 191 } 192 } 193 } 194 clearCascadingSections()195 inline void clearCascadingSections() { 196 firstCascadingSection = sectionCount; 197 lastCascadingSection = 0; 198 cascadingSectionSize.clear(); 199 } 200 saveCascadingSectionSize(int visual,int size)201 inline void saveCascadingSectionSize(int visual, int size) { 202 if (!cascadingSectionSize.contains(visual)) { 203 cascadingSectionSize.insert(visual, size); 204 firstCascadingSection = qMin(firstCascadingSection, visual); 205 lastCascadingSection = qMax(lastCascadingSection, visual); 206 } 207 } 208 sectionIsCascadable(int visual)209 inline bool sectionIsCascadable(int visual) const { 210 return headerSectionResizeMode(visual) == QHeaderView::Interactive; 211 } 212 modelSectionCount()213 inline int modelSectionCount() const { 214 return (orientation == Qt::Horizontal 215 ? model->columnCount(root) 216 : model->rowCount(root)); 217 } 218 modelIsEmpty()219 inline bool modelIsEmpty() const { 220 return (model->rowCount(root) == 0 || model->columnCount(root) == 0); 221 } 222 doDelayedResizeSections()223 inline void doDelayedResizeSections() { 224 if (!delayedResize.isActive()) 225 delayedResize.start(0, q_func()); 226 } 227 executePostedResize()228 inline void executePostedResize() const { 229 if (delayedResize.isActive() && state == NoState) { 230 const_cast<QHeaderView*>(q_func())->resizeSections(); 231 } 232 } 233 234 void clear(); 235 void flipSortIndicator(int section); 236 void cascadingResize(int visual, int newSize); 237 238 enum State { NoState, ResizeSection, MoveSection, SelectSections, NoClear } state; 239 240 int offset; 241 Qt::Orientation orientation; 242 Qt::SortOrder sortIndicatorOrder; 243 int sortIndicatorSection; 244 bool sortIndicatorShown; 245 246 mutable QVector<int> visualIndices; // visualIndex = visualIndices.at(logicalIndex) 247 mutable QVector<int> logicalIndices; // logicalIndex = row or column in the model 248 mutable QBitArray sectionSelected; // from logical index to bit 249 mutable QBitArray sectionHidden; // from visual index to bit 250 mutable QHash<int, int> hiddenSectionSize; // from logical index to section size 251 mutable QHash<int, int> cascadingSectionSize; // from visual index to section size 252 mutable QSize cachedSizeHint; 253 mutable QBasicTimer delayedResize; 254 255 int firstCascadingSection; 256 int lastCascadingSection; 257 258 int lastPos; 259 int firstPos; 260 int originalSize; 261 int section; // used for resizing and moving sections 262 int target; 263 int pressed; 264 int hover; 265 266 int length; 267 int sectionCount; 268 bool movableSections; 269 bool clickableSections; 270 bool highlightSelected; 271 bool stretchLastSection; 272 bool cascadingResizing; 273 bool resizeRecursionBlock; 274 int stretchSections; 275 int contentsSections; 276 int defaultSectionSize; 277 int minimumSectionSize; 278 int lastSectionSize; // $$$ 279 int sectionIndicatorOffset; 280 Qt::Alignment defaultAlignment; 281 QLabel *sectionIndicator; 282 QHeaderView::ResizeMode globalResizeMode; 283 QList<QPersistentModelIndex> persistentHiddenSections; 284 285 // header section spans 286 287 struct SectionSpan { 288 int size; 289 int count; 290 QHeaderView::ResizeMode resizeMode; SectionSpanSectionSpan291 inline SectionSpan() : size(0), count(0), resizeMode(QHeaderView::Interactive) {} SectionSpanSectionSpan292 inline SectionSpan(int length, int sections, QHeaderView::ResizeMode mode) 293 : size(length), count(sections), resizeMode(mode) {} sectionSizeSectionSpan294 inline int sectionSize() const { return (count > 0 ? size / count : 0); } 295 #ifndef QT_NO_DATASTREAM writeSectionSpan296 inline void write(QDataStream &out) const 297 { out << size; out << count; out << (int)resizeMode; } readSectionSpan298 inline void read(QDataStream &in) 299 { in >> size; in >> count; int m; in >> m; resizeMode = (QHeaderView::ResizeMode)m; } 300 #endif 301 }; 302 303 QVector<SectionSpan> sectionSpans; 304 305 void createSectionSpan(int start, int end, int size, QHeaderView::ResizeMode mode); 306 void removeSectionsFromSpans(int start, int end); 307 void resizeSectionSpan(int visualIndex, int oldSize, int newSize); 308 void setDefaultSectionSize(int size); 309 headerSectionCount()310 inline int headerSectionCount() const { // for debugging 311 int count = 0; 312 for (int i = 0; i < sectionSpans.count(); ++i) 313 count += sectionSpans.at(i).count; 314 return count; 315 } 316 headerLength()317 inline int headerLength() const { // for debugging 318 int len = 0; 319 for (int i = 0; i < sectionSpans.count(); ++i) 320 len += sectionSpans.at(i).size; 321 return len; 322 } 323 removeSpans(const QList<int> & spans)324 inline void removeSpans(const QList<int> &spans) { 325 for (int i = spans.count() - 1; i >= 0; --i) { 326 length -= sectionSpans.at(spans.at(i)).size; 327 sectionSpans.remove(spans.at(i)); 328 } 329 } 330 sectionSpanIndex(int visual)331 inline int sectionSpanIndex(int visual) const { 332 int section_start = 0; 333 for (int i = 0; i < sectionSpans.count(); ++i) { 334 int section_end = section_start + sectionSpans.at(i).count - 1; 335 if (visual >= section_start && visual <= section_end) 336 return i; 337 section_start = section_end + 1; 338 } 339 return -1; 340 } 341 342 int headerSectionSize(int visual) const; 343 int headerSectionPosition(int visual) const; 344 int headerVisualIndexAt(int position) const; 345 346 // resize mode 347 void setHeaderSectionResizeMode(int visual, QHeaderView::ResizeMode mode); 348 QHeaderView::ResizeMode headerSectionResizeMode(int visual) const; 349 void setGlobalHeaderResizeMode(QHeaderView::ResizeMode mode); 350 351 // other 352 int viewSectionSizeHint(int logical) const; 353 int adjustedVisualIndex(int visualIndex) const; 354 355 #ifndef QT_NO_DATASTREAM 356 void write(QDataStream &out) const; 357 bool read(QDataStream &in); 358 #endif 359 360 }; 361 362 QT_END_NAMESPACE 363 364 #endif // QT_NO_ITEMVIEWS 365 366 #endif // QHEADERVIEW_P_H 367