source: trunk/src/gui/itemviews/qheaderview_p.h@ 748

Last change on this file since 748 was 651, checked in by Dmitry A. Kuminov, 16 years ago

trunk: Merged in qt 4.6.2 sources.
File size: 12.3 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the QtGui module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at [email protected].
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
64QT_BEGIN_NAMESPACE
65
66class QHeaderViewPrivate: public QAbstractItemViewPrivate
67{
68 Q_DECLARE_PUBLIC(QHeaderView)
69
70public:
71 enum StateVersion { VersionMarker = 0xff };
72
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
116 inline bool rowIntersectsSelection(int row) const {
117 return (selectionModel ? selectionModel->rowIntersectsSelection(row, root) : false);
118 }
119
120 inline bool columnIntersectsSelection(int column) const {
121 return (selectionModel ? selectionModel->columnIntersectsSelection(column, root) : false);
122 }
123
124 inline bool sectionIntersectsSelection(int logical) const {
125 return (orientation == Qt::Horizontal ? columnIntersectsSelection(logical) : rowIntersectsSelection(logical));
126 }
127
128 inline bool isRowSelected(int row) const {
129 return (selectionModel ? selectionModel->isRowSelected(row, root) : false);
130 }
131
132 inline bool isColumnSelected(int column) const {
133 return (selectionModel ? selectionModel->isColumnSelected(column, root) : false);
134 }
135
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
144 inline bool reverse() const {
145 return orientation == Qt::Horizontal && q_func()->isRightToLeft();
146 }
147
148 inline int logicalIndex(int visualIndex) const {
149 return logicalIndices.isEmpty() ? visualIndex : logicalIndices.at(visualIndex);
150 }
151
152 inline int visualIndex(int logicalIndex) const {
153 return visualIndices.isEmpty() ? logicalIndex : visualIndices.at(logicalIndex);
154 }
155
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
165 inline bool isVisualIndexHidden(int visual) const {
166 return !sectionHidden.isEmpty() && sectionHidden.at(visual);
167 }
168
169 inline void setVisualIndexHidden(int visual, bool hidden) {
170 if (!sectionHidden.isEmpty()) sectionHidden.setBit(visual, hidden);
171 }
172
173 inline bool hasAutoResizeSections() const {
174 return stretchSections || stretchLastSection || contentsSections;
175 }
176
177 QStyleOptionHeader getStyleOption() const;
178
179 inline void invalidateCachedSizeHint() const {
180 cachedSizeHint = QSize();
181 }
182
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
195 inline void clearCascadingSections() {
196 firstCascadingSection = sectionCount;
197 lastCascadingSection = 0;
198 cascadingSectionSize.clear();
199 }
200
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
209 inline bool sectionIsCascadable(int visual) const {
210 return headerSectionResizeMode(visual) == QHeaderView::Interactive;
211 }
212
213 inline int modelSectionCount() const {
214 return (orientation == Qt::Horizontal
215 ? model->columnCount(root)
216 : model->rowCount(root));
217 }
218
219 inline bool modelIsEmpty() const {
220 return (model->rowCount(root) == 0 || model->columnCount(root) == 0);
221 }
222
223 inline void doDelayedResizeSections() {
224 if (!delayedResize.isActive())
225 delayedResize.start(0, q_func());
226 }
227
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;
291 inline SectionSpan() : size(0), count(0), resizeMode(QHeaderView::Interactive) {}
292 inline SectionSpan(int length, int sections, QHeaderView::ResizeMode mode)
293 : size(length), count(sections), resizeMode(mode) {}
294 inline int sectionSize() const { return (count > 0 ? size / count : 0); }
295#ifndef QT_NO_DATASTREAM
296 inline void write(QDataStream &out) const
297 { out << size; out << count; out << (int)resizeMode; }
298 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
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
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
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
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
362QT_END_NAMESPACE
363
364#endif // QT_NO_ITEMVIEWS
365
366#endif // QHEADERVIEW_P_H
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