qquickitemview_p

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qquickitemview_p_p.h

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/****************************************************************************

** Contact: https://www.qt.io/licensing/

** This file is part of the QtQuick module of the Qt Toolkit.

** $QT_BEGIN_LICENSE:LGPL$

** Commercial License Usage

** Licensees holding valid commercial Qt licenses may use this file in

** accordance with the commercial license agreement provided with the

** Software or, alternatively, in accordance with the terms contained in

** a written agreement between you and The Qt Company. For licensing terms

** and conditions see https://www.qt.io/terms-conditions. For further

** information use the contact form at https://www.qt.io/contact-us.

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 3 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL3 included in the

** packaging of this file. Please review the following information to

** ensure the GNU Lesser General Public License version 3 requirements

** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.

** GNU General Public License Usage

** Alternatively, this file may be used under the terms of the GNU

** General Public License version 2.0 or (at your option) the GNU General

** Public license version 3 or any later version approved by the KDE Free

** Qt Foundation. The licenses are as published by the Free Software

** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3

** included in the packaging of this file. Please review the following

** information to ensure the GNU General Public License requirements will

** be met: https://www.gnu.org/licenses/gpl-2.0.html and

** https://www.gnu.org/licenses/gpl-3.0.html.

** $QT_END_LICENSE$

****************************************************************************/

#ifndef QQUICKITEMVIEW_P_P_H

#define QQUICKITEMVIEW_P_P_H

// W A R N I N G

// -------------

// This file is not part of the Qt API. It exists purely as an

// implementation detail. This header file may change from version to

// version without notice, or even be removed.

// We mean it.

#include <QtQuick/private/qtquickglobal_p.h>

QT_REQUIRE_CONFIG(quick_itemview);

#include "qquickitemview_p.h"

#include "qquickitemviewfxitem_p_p.h"

#include "qquickitemviewtransition_p.h"

#include "qquickflickable_p_p.h"

#include <QtQml/private/qqmlobjectmodel_p.h>

#include <QtQml/private/qqmldelegatemodel_p.h>

#include <QtQml/private/qqmlchangeset_p.h>

QT_BEGIN_NAMESPACE

class Q_AUTOTEST_EXPORT FxViewItem : public QQuickItemViewFxItem

{

public:

FxViewItem(QQuickItem *, QQuickItemView *, bool own, QQuickItemViewAttached *attached);

QQuickItemView *view;

QQuickItemViewAttached *attached;

};

class QQuickItemViewChangeSet

{

public:

QQuickItemViewChangeSet();

bool hasPendingChanges() const;

void prepare(int currentIndex, int count);

void reset();

void applyChanges(const QQmlChangeSet &changeSet);

void applyBufferedChanges(const QQuickItemViewChangeSet &other);

int itemCount;

int newCurrentIndex;

QQmlChangeSet pendingChanges;

QHash<QQmlChangeSet::MoveKey, FxViewItem *> removedItems;

bool active : 1;

bool currentChanged : 1;

bool currentRemoved : 1;

};

class Q_AUTOTEST_EXPORT QQuickItemViewPrivate : public QQuickFlickablePrivate, public QQuickItemViewTransitionChangeListener, public QAnimationJobChangeListener

104

{

105

Q_DECLARE_PUBLIC(QQuickItemView)

106

public:

107

QQuickItemViewPrivate();

108

~QQuickItemViewPrivate();

109

110

static inline QQuickItemViewPrivate *get(QQuickItemView *o) { return o->d_func(); }

executed 88082 times by 11 tests: return o->d_func();

Executed by:

tst_examples
tst_qqmllistmodel
tst_qqmltypeloader
tst_qqmlvaluetypes
tst_qquickanimations
tst_qquickgridview
tst_qquickimage
tst_qquicklistview
tst_qquickmousearea
tst_qquickspringanimation
tst_qquickvisualdatamodel

88082

111

112

struct ChangeResult {

113

QQmlNullableValue<qreal> visiblePos;

114

bool changedFirstItem;

115

qreal sizeChangesBeforeVisiblePos;

116

qreal sizeChangesAfterVisiblePos;

117

int countChangeBeforeVisible;

118

int countChangeAfterVisibleItems;

119

120

ChangeResult()

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: visiblePos(0), changedFirstItem(false),

122

sizeChangesBeforeVisiblePos(0), sizeChangesAfterVisiblePos(0),

123

countChangeBeforeVisible(0), countChangeAfterVisibleItems(0) {}

executed 14770 times by 8 tests: end of block

Executed by:

tst_examples
tst_qqmltypeloader
tst_qquickgridview
tst_qquickimage
tst_qquicklistview
tst_qquickmousearea
tst_qquickspringanimation
tst_qquickvisualdatamodel

14770

124

125

ChangeResult(const QQmlNullableValue<qreal> &p)

126

: visiblePos(p), changedFirstItem(false),

127

sizeChangesBeforeVisiblePos(0), sizeChangesAfterVisiblePos(0),

128

countChangeBeforeVisible(0), countChangeAfterVisibleItems(0) {}

executed 7662 times by 4 tests: end of block

Executed by:

tst_examples
tst_qquickgridview
tst_qquicklistview
tst_qquickvisualdatamodel

7662

129

130

ChangeResult &operator+=(const ChangeResult &other) {

131

if (&other == this)

&other == this	Description
TRUE	never evaluated
FALSE	evaluated 6354 times by 4 tests Evaluated by: tst_examples tst_qquickgridview tst_qquicklistview tst_qquickvisualdatamodel

0-6354

132

return *this;

never executed: return *this;

133

changedFirstItem &= other.changedFirstItem;

134

sizeChangesBeforeVisiblePos += other.sizeChangesBeforeVisiblePos;

135

sizeChangesAfterVisiblePos += other.sizeChangesAfterVisiblePos;

136

countChangeBeforeVisible += other.countChangeBeforeVisible;

137

countChangeAfterVisibleItems += other.countChangeAfterVisibleItems;

138

return *this;

executed 6354 times by 4 tests: return *this;

Executed by:

tst_examples
tst_qquickgridview
tst_qquicklistview
tst_qquickvisualdatamodel

6354

}

void reset() {

changedFirstItem = false;

143

sizeChangesBeforeVisiblePos = 0.0;

144

sizeChangesAfterVisiblePos = 0.0;

145

countChangeBeforeVisible = 0;

146

countChangeAfterVisibleItems = 0;

147

}

executed 8894 times by 3 tests: end of block

Executed by:

tst_qquickgridview
tst_qquicklistview
tst_qquickvisualdatamodel

8894

148

};

149

150

enum BufferMode { NoBuffer = 0x00, BufferBefore = 0x01, BufferAfter = 0x02 };

151

enum MovementReason { Other, SetIndex, Mouse };

152

153

bool isValid() const;

154

qreal position() const;

155

qreal size() const;

156

qreal startPosition() const;

157

qreal endPosition() const;

158

qreal contentStartOffset() const;

159

int findLastVisibleIndex(int defaultValue = -1) const;

160

FxViewItem *visibleItem(int modelIndex) const;

161

FxViewItem *firstVisibleItem() const;

162

int findLastIndexInView() const;

163

int mapFromModel(int modelIndex) const;

164

165

virtual void init();

166

virtual void clear();

167

virtual void updateViewport();

168

169

void regenerate(bool orientationChanged=false);

170

void layout();

171

void animationFinished(QAbstractAnimationJob *) override;

172

void refill();

173

void refill(qreal from, qreal to);

174

void mirrorChange() override;

175

176

FxViewItem *createItem(int modelIndex,QQmlIncubator::IncubationMode incubationMode = QQmlIncubator::AsynchronousIfNested);

177

virtual bool releaseItem(FxViewItem *item);

178

179

QQuickItem *createHighlightItem() const;

180

QQuickItem *createComponentItem(QQmlComponent *component, qreal zValue, bool createDefault = false) const;

181

182

void updateCurrent(int modelIndex);

183

void updateTrackedItem();

184

void updateUnrequestedIndexes();

185

void updateUnrequestedPositions();

186

void updateVisibleIndex();

187

void positionViewAtIndex(int index, int mode);

188

189

qreal minExtentForAxis(const AxisData &axisData, bool forXAxis) const;

190

qreal maxExtentForAxis(const AxisData &axisData, bool forXAxis) const;

191

qreal calculatedMinExtent() const;

192

qreal calculatedMaxExtent() const;

193

194

void applyPendingChanges();

195

bool applyModelChanges(ChangeResult *insertionResult, ChangeResult *removalResult);

196

bool applyRemovalChange(const QQmlChangeSet::Change &removal, ChangeResult *changeResult, int *removedCount);

197

void removeItem(FxViewItem *item, const QQmlChangeSet::Change &removal, ChangeResult *removeResult);

198

virtual void updateSizeChangesBeforeVisiblePos(FxViewItem *item, ChangeResult *removeResult);

199

void repositionFirstItem(FxViewItem *prevVisibleItemsFirst, qreal prevVisibleItemsFirstPos,

200

FxViewItem *prevFirstVisible, ChangeResult *insertionResult, ChangeResult *removalResult);

201

202

void createTransitioner();

203

void prepareVisibleItemTransitions();

204

void prepareRemoveTransitions(QHash<QQmlChangeSet::MoveKey, FxViewItem *> *removedItems);

205

bool prepareNonVisibleItemTransition(FxViewItem *item, const QRectF &viewBounds);

206

void viewItemTransitionFinished(QQuickItemViewTransitionableItem *item) override;

207

208

int findMoveKeyIndex(QQmlChangeSet::MoveKey key, const QVector<QQmlChangeSet::Change> &changes) const;

209

210

void checkVisible() const;

211

void showVisibleItems() const;

212

213

void markExtentsDirty() {

214

if (layoutOrientation() == Qt::Vertical)

layoutOrientat...= Qt::Vertical	Description
TRUE	evaluated 28216 times by 12 tests Evaluated by: tst_examples tst_qqmlecmascript tst_qqmllistmodel tst_qqmltypeloader tst_qqmlvaluetypes tst_qquickanimations tst_qquickgridview tst_qquickimage tst_qquicklistview tst_qquickmousearea tst_qquickspringanimation tst_qquickvisualdatamodel
FALSE	evaluated 6528 times by 3 tests Evaluated by: tst_examples tst_qquickgridview tst_qquicklistview

6528-28216

215

vData.markExtentsDirty();

executed 28216 times by 12 tests: vData.markExtentsDirty();

Executed by:

tst_examples
tst_qqmlecmascript
tst_qqmllistmodel
tst_qqmltypeloader
tst_qqmlvaluetypes
tst_qquickanimations
tst_qquickgridview
tst_qquickimage
tst_qquicklistview
tst_qquickmousearea
tst_qquickspringanimation
tst_qquickvisualdatamodel

28216

216

else

217

hData.markExtentsDirty();

executed 6528 times by 3 tests: hData.markExtentsDirty();

Executed by:

tst_examples
tst_qquickgridview
tst_qquicklistview

6528

218

}

219

220

bool hasPendingChanges() const {

221

return currentChanges.hasPendingChanges()

executed 27099 times by 8 tests: return currentChanges.hasPendingChanges() || bufferedChanges.hasPendingChanges() ||runDelayedRemoveTransition;

Executed by:

tst_examples
tst_qqmltypeloader
tst_qquickgridview
tst_qquickimage
tst_qquicklistview
tst_qquickmousearea
tst_qquickspringanimation
tst_qquickvisualdatamodel

27099

222

|| bufferedChanges.hasPendingChanges()

executed 27099 times by 8 tests: return currentChanges.hasPendingChanges() || bufferedChanges.hasPendingChanges() ||runDelayedRemoveTransition;

Executed by:

tst_examples
tst_qqmltypeloader
tst_qquickgridview
tst_qquickimage
tst_qquicklistview
tst_qquickmousearea
tst_qquickspringanimation
tst_qquickvisualdatamodel

27099

223

||runDelayedRemoveTransition;

executed 27099 times by 8 tests: return currentChanges.hasPendingChanges() || bufferedChanges.hasPendingChanges() ||runDelayedRemoveTransition;

Executed by:

tst_examples
tst_qqmltypeloader
tst_qquickgridview
tst_qquickimage
tst_qquicklistview
tst_qquickmousearea
tst_qquickspringanimation
tst_qquickvisualdatamodel

27099

224

}

225

226

void refillOrLayout() {

227

if (hasPendingChanges())

hasPendingChanges()	Description
TRUE	evaluated 31 times by 2 tests Evaluated by: tst_qquickgridview tst_qquicklistview
FALSE	evaluated 16757 times by 5 tests Evaluated by: tst_examples tst_qquickgridview tst_qquicklistview tst_qquickmousearea tst_qquickvisualdatamodel

31-16757

228

layout();

executed 31 times by 2 tests: layout();

Executed by:

tst_qquickgridview
tst_qquicklistview

229

else

230

refill();

executed 16757 times by 5 tests: refill();

Executed by:

tst_examples
tst_qquickgridview
tst_qquicklistview
tst_qquickmousearea
tst_qquickvisualdatamodel

16757

231

}

232

233

void forceLayoutPolish() {

Q_Q(QQuickItemView);

forceLayout = true;

q->polish();

}

executed 7637 times by 11 tests: end of block

Executed by:

tst_examples
tst_qqmllistmodel
tst_qqmltypeloader
tst_qqmlvaluetypes
tst_qquickanimations
tst_qquickgridview
tst_qquickimage
tst_qquicklistview
tst_qquickmousearea
tst_qquickspringanimation
tst_qquickvisualdatamodel

7637

238

239

void releaseVisibleItems() {

240

// make a copy and clear the visibleItems first to avoid destroyed

241

// items being accessed during the loop (QTBUG-61294)

242

const QList<FxViewItem *> oldVisible = visibleItems;

243

visibleItems.clear();

244

for (FxViewItem *item : oldVisible)

245

releaseItem(item);

executed 61007 times by 10 tests: releaseItem(item);

Executed by:

tst_examples
tst_qqmllistmodel
tst_qqmltypeloader
tst_qqmlvaluetypes
tst_qquickgridview
tst_qquickimage
tst_qquicklistview
tst_qquickmousearea
tst_qquickspringanimation
tst_qquickvisualdatamodel

61007

246

}

executed 11450 times by 12 tests: end of block

Executed by:

tst_examples
tst_qqmlecmascript
tst_qqmllistmodel
tst_qqmltypeloader
tst_qqmlvaluetypes
tst_qquickanimations
tst_qquickgridview
tst_qquickimage
tst_qquicklistview
tst_qquickmousearea
tst_qquickspringanimation
tst_qquickvisualdatamodel

11450

247

248

QPointer<QQmlInstanceModel> model;

249

QVariant modelVariant;

int itemCount;

int buffer;

int bufferMode;

int displayMarginBeginning;

254

int displayMarginEnd;

255

Qt::LayoutDirection layoutDirection;

256

QQuickItemView::VerticalLayoutDirection verticalLayoutDirection;

257

258

MovementReason moveReason;

259

260

QList<FxViewItem *> visibleItems;

261

int visibleIndex;

262

int currentIndex;

263

FxViewItem *currentItem;

264

FxViewItem *trackedItem;

265

QHash<QQuickItem*,int> unrequestedItems;

266

int requestedIndex;

267

QQuickItemViewChangeSet currentChanges;

268

QQuickItemViewChangeSet bufferedChanges;

269

QPauseAnimationJob bufferPause;

270

271

QQmlComponent *highlightComponent;

272

FxViewItem *highlight;

273

int highlightRange; // enum value

274

qreal highlightRangeStart;

275

qreal highlightRangeEnd;

276

int highlightMoveDuration;

277

278

QQmlComponent *headerComponent;

279

FxViewItem *header;

280

QQmlComponent *footerComponent;

FxViewItem *footer;

struct MovedItem {

FxViewItem *item;

QQmlChangeSet::MoveKey moveKey;

286

MovedItem(FxViewItem *i, QQmlChangeSet::MoveKey k)

287

: item(i), moveKey(k) {}

executed 90 times by 2 tests: end of block

Executed by:

tst_qquickgridview
tst_qquicklistview

288

};

289

QQuickItemViewTransitioner *transitioner;

290

QList<FxViewItem *> releasePendingTransition;

291

292

mutable qreal minExtent;

293

mutable qreal maxExtent;

bool ownModel : 1;

bool wrap : 1;

bool keyNavigationEnabled : 1;

298

bool explicitKeyNavigationEnabled : 1;

299

bool inLayout : 1;

300

bool inViewportMoved : 1;

301

bool forceLayout : 1;

302

bool currentIndexCleared : 1;

303

bool haveHighlightRange : 1;

304

bool autoHighlight : 1;

305

bool highlightRangeStartValid : 1;

306

bool highlightRangeEndValid : 1;

307

bool fillCacheBuffer : 1;

308

bool inRequest : 1;

309

bool runDelayedRemoveTransition : 1;

310

bool delegateValidated : 1;

311

312

protected:

313

virtual Qt::Orientation layoutOrientation() const = 0;

314

virtual bool isContentFlowReversed() const = 0;

315

316

virtual qreal positionAt(int index) const = 0;

317

virtual qreal endPositionAt(int index) const = 0;

318

virtual qreal originPosition() const = 0;

319

virtual qreal lastPosition() const = 0;

320

321

virtual qreal headerSize() const = 0;

322

virtual qreal footerSize() const = 0;

323

virtual bool showHeaderForIndex(int index) const = 0;

324

virtual bool showFooterForIndex(int index) const = 0;

325

virtual void updateHeader() = 0;

326

virtual void updateFooter() = 0;

327

virtual bool hasStickyHeader() const { return false; }

executed 130 times by 1 test: return false;

Executed by:

tst_qquickgridview

130

328

virtual bool hasStickyFooter() const { return false; }

executed 130 times by 1 test: return false;

Executed by:

tst_qquickgridview

130

329

330

virtual void createHighlight() = 0;

331

virtual void updateHighlight() = 0;

332

virtual void resetHighlightPosition() = 0;

333

virtual bool movingFromHighlight() { return false; }

executed 3523 times by 4 tests: return false;

Executed by:

tst_examples
tst_qquickgridview
tst_qquickimage
tst_qquickvisualdatamodel

3523

334

335

virtual void setPosition(qreal pos) = 0;

336

virtual void fixupPosition() = 0;

337

338

virtual bool addVisibleItems(qreal fillFrom, qreal fillTo, qreal bufferFrom, qreal bufferTo, bool doBuffer) = 0;

339

virtual bool removeNonVisibleItems(qreal bufferFrom, qreal bufferTo) = 0;

340

virtual void visibleItemsChanged() {}

341

342

virtual FxViewItem *newViewItem(int index, QQuickItem *item) = 0;

343

virtual void repositionItemAt(FxViewItem *item, int index, qreal sizeBuffer) = 0;

344

virtual void repositionPackageItemAt(QQuickItem *item, int index) = 0;

345

virtual void resetFirstItemPosition(qreal pos = 0.0) = 0;

346

virtual void adjustFirstItem(qreal forwards, qreal backwards, int changeBeforeVisible) = 0;

347

348

virtual void layoutVisibleItems(int fromModelIndex = 0) = 0;

349

virtual void changedVisibleIndex(int newIndex) = 0;

350

351

virtual bool applyInsertionChange(const QQmlChangeSet::Change &insert, ChangeResult *changeResult,

352

QList<FxViewItem *> *newItems, QList<MovedItem> *movingIntoView) = 0;

353

354

virtual bool needsRefillForAddedOrRemovedIndex(int) const { return false; }

executed 79 times by 1 test: return false;

Executed by:

tst_qquicklistview

355

virtual void translateAndTransitionItemsAfter(int afterIndex, const ChangeResult &insertionResult, const ChangeResult &removalResult) = 0;

356

357

virtual void initializeViewItem(FxViewItem *) {}

358

virtual void initializeCurrentItem() {}

359

virtual void updateSectionCriteria() {}

360

virtual void updateSections() {}

361

362

void itemGeometryChanged(QQuickItem *item, QQuickGeometryChange change, const QRectF &) override;

};

QT_END_NAMESPACE

#endif // QQUICKITEMVIEW_P_P_H

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