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From e61200ff7222c31e73dbc779ba4a70073775cc0c Mon Sep 17 00:00:00 2001
From: Aleix Pol <aleixpol@kde.org>
Date: Thu, 23 Sep 2021 03:43:04 +0200
Subject: [PATCH 04/21] QQmlDelegateModel: Refresh the view when a column is
added at 0
It can happen that a model reports n>0 rows but columns=0 (See
QConcatenateTablesProxyModel). In those cases we would render glitchy
items until the elements are marked as dirty.
Change-Id: I615c9cacbb1b6f9dee3898b03476605e5ac39d0a
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
(cherry picked from commit ec9251efb918f37971aeefa1f687d137d037ff12)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
Signed-off-by: Aleix Pol <aleixpol@kde.org>
---
src/qmlmodels/qqmldelegatemodel.cpp | 44 +++++++++++++++++++
src/qmlmodels/qqmldelegatemodel_p.h | 3 ++
.../data/redrawUponColumnChange.qml | 11 +++++
.../tst_qqmldelegatemodel.cpp | 27 ++++++++++++
4 files changed, 85 insertions(+)
create mode 100644 tests/auto/qml/qqmldelegatemodel/data/redrawUponColumnChange.qml
diff --git a/src/qmlmodels/qqmldelegatemodel.cpp b/src/qmlmodels/qqmldelegatemodel.cpp
index 2079a8ed04..a577cb2351 100644
--- a/src/qmlmodels/qqmldelegatemodel.cpp
+++ b/src/qmlmodels/qqmldelegatemodel.cpp
@@ -389,6 +389,12 @@ void QQmlDelegateModelPrivate::connectToAbstractItemModel()
q, QQmlDelegateModel, SLOT(_q_rowsRemoved(QModelIndex,int,int)));
qmlobject_connect(aim, QAbstractItemModel, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
q, QQmlDelegateModel, SLOT(_q_rowsAboutToBeRemoved(QModelIndex,int,int)));
+ qmlobject_connect(aim, QAbstractItemModel, SIGNAL(columnsInserted(QModelIndex,int,int)),
+ q, QQmlDelegateModel, SLOT(_q_columnsInserted(QModelIndex,int,int)));
+ qmlobject_connect(aim, QAbstractItemModel, SIGNAL(columnsRemoved(QModelIndex,int,int)),
+ q, QQmlDelegateModel, SLOT(_q_columnsRemoved(QModelIndex,int,int)));
+ qmlobject_connect(aim, QAbstractItemModel, SIGNAL(columnsMoved(QModelIndex,int,int,QModelIndex,int)),
+ q, QQmlDelegateModel, SLOT(_q_columnsMoved(QModelIndex,int,int,QModelIndex,int)));
qmlobject_connect(aim, QAbstractItemModel, SIGNAL(dataChanged(QModelIndex,QModelIndex,QVector<int>)),
q, QQmlDelegateModel, SLOT(_q_dataChanged(QModelIndex,QModelIndex,QVector<int>)));
qmlobject_connect(aim, QAbstractItemModel, SIGNAL(rowsMoved(QModelIndex,int,int,QModelIndex,int)),
@@ -413,6 +419,12 @@ void QQmlDelegateModelPrivate::disconnectFromAbstractItemModel()
q, SLOT(_q_rowsAboutToBeRemoved(QModelIndex,int,int)));
QObject::disconnect(aim, SIGNAL(rowsRemoved(QModelIndex,int,int)),
q, SLOT(_q_rowsRemoved(QModelIndex,int,int)));
+ QObject::disconnect(aim, SIGNAL(columnsInserted(QModelIndex,int,int)), q,
+ SLOT(_q_columnsInserted(QModelIndex,int,int)));
+ QObject::disconnect(aim, SIGNAL(columnsRemoved(QModelIndex,int,int)), q,
+ SLOT(_q_columnsRemoved(QModelIndex,int,int)));
+ QObject::disconnect(aim, SIGNAL(columnsMoved(QModelIndex,int,int,QModelIndex,int)), q,
+ SLOT(_q_columnsMoved(QModelIndex,int,int,QModelIndex,int)));
QObject::disconnect(aim, SIGNAL(dataChanged(QModelIndex,QModelIndex,QVector<int>)),
q, SLOT(_q_dataChanged(QModelIndex,QModelIndex,QVector<int>)));
QObject::disconnect(aim, SIGNAL(rowsMoved(QModelIndex,int,int,QModelIndex,int)),
@@ -1973,6 +1985,38 @@ void QQmlDelegateModel::_q_rowsMoved(
}
}
+void QQmlDelegateModel::_q_columnsInserted(const QModelIndex &parent, int begin, int end)
+{
+ Q_D(QQmlDelegateModel);
+ Q_UNUSED(end);
+ if (parent == d->m_adaptorModel.rootIndex && begin == 0) {
+ // mark all items as changed
+ _q_itemsChanged(0, d->m_count, QVector<int>());
+ }
+}
+
+void QQmlDelegateModel::_q_columnsRemoved(const QModelIndex &parent, int begin, int end)
+{
+ Q_D(QQmlDelegateModel);
+ Q_UNUSED(end);
+ if (parent == d->m_adaptorModel.rootIndex && begin == 0) {
+ // mark all items as changed
+ _q_itemsChanged(0, d->m_count, QVector<int>());
+ }
+}
+
+void QQmlDelegateModel::_q_columnsMoved(const QModelIndex &parent, int start, int end,
+ const QModelIndex &destination, int column)
+{
+ Q_D(QQmlDelegateModel);
+ Q_UNUSED(end);
+ if ((parent == d->m_adaptorModel.rootIndex && start == 0)
+ || (destination == d->m_adaptorModel.rootIndex && column == 0)) {
+ // mark all items as changed
+ _q_itemsChanged(0, d->m_count, QVector<int>());
+ }
+}
+
void QQmlDelegateModel::_q_dataChanged(const QModelIndex &begin, const QModelIndex &end, const QVector<int> &roles)
{
Q_D(QQmlDelegateModel);
diff --git a/src/qmlmodels/qqmldelegatemodel_p.h b/src/qmlmodels/qqmldelegatemodel_p.h
index 8aab4badca..d140bfbaaf 100644
--- a/src/qmlmodels/qqmldelegatemodel_p.h
+++ b/src/qmlmodels/qqmldelegatemodel_p.h
@@ -152,6 +152,9 @@ private Q_SLOTS:
void _q_itemsMoved(int from, int to, int count);
void _q_modelReset();
void _q_rowsInserted(const QModelIndex &,int,int);
+ void _q_columnsInserted(const QModelIndex &, int, int);
+ void _q_columnsRemoved(const QModelIndex &, int, int);
+ void _q_columnsMoved(const QModelIndex &, int, int, const QModelIndex &, int);
void _q_rowsAboutToBeRemoved(const QModelIndex &parent, int begin, int end);
void _q_rowsRemoved(const QModelIndex &,int,int);
void _q_rowsMoved(const QModelIndex &, int, int, const QModelIndex &, int);
diff --git a/tests/auto/qml/qqmldelegatemodel/data/redrawUponColumnChange.qml b/tests/auto/qml/qqmldelegatemodel/data/redrawUponColumnChange.qml
new file mode 100644
index 0000000000..206133bb39
--- /dev/null
+++ b/tests/auto/qml/qqmldelegatemodel/data/redrawUponColumnChange.qml
@@ -0,0 +1,11 @@
+import QtQuick 2.8
+
+ListView {
+ id: root
+ width: 200
+ height: 200
+
+ delegate: Text {
+ text: display
+ }
+}
diff --git a/tests/auto/qml/qqmldelegatemodel/tst_qqmldelegatemodel.cpp b/tests/auto/qml/qqmldelegatemodel/tst_qqmldelegatemodel.cpp
index 35f1e2c94d..1722447830 100644
--- a/tests/auto/qml/qqmldelegatemodel/tst_qqmldelegatemodel.cpp
+++ b/tests/auto/qml/qqmldelegatemodel/tst_qqmldelegatemodel.cpp
@@ -27,6 +27,8 @@
****************************************************************************/
#include <QtTest/qtest.h>
+#include <QtCore/QConcatenateTablesProxyModel>
+#include <QtGui/QStandardItemModel>
#include <QtQml/qqmlcomponent.h>
#include <QtQmlModels/private/qqmldelegatemodel_p.h>
#include <QtQuick/qquickview.h>
@@ -47,6 +49,7 @@ private slots:
void filterOnGroup_removeWhenCompleted();
void qtbug_86017();
void contextAccessedByHandler();
+ void redrawUponColumnChange();
};
class AbstractItemModel : public QAbstractItemModel
@@ -186,6 +189,30 @@ void tst_QQmlDelegateModel::contextAccessedByHandler()
QVERIFY(root->property("works").toBool());
}
+void tst_QQmlDelegateModel::redrawUponColumnChange()
+{
+ QStandardItemModel m1;
+ m1.appendRow({
+ new QStandardItem("Banana"),
+ new QStandardItem("Coconut"),
+ });
+
+ QQuickView view(testFileUrl("redrawUponColumnChange.qml"));
+ QCOMPARE(view.status(), QQuickView::Ready);
+ view.show();
+ QQuickItem *root = view.rootObject();
+ root->setProperty("model", QVariant::fromValue<QObject *>(&m1));
+
+ QObject *item = root->property("currentItem").value<QObject *>();
+ QVERIFY(item);
+ QCOMPARE(item->property("text").toString(), "Banana");
+
+ QVERIFY(root);
+ m1.removeColumn(0);
+
+ QCOMPARE(item->property("text").toString(), "Coconut");
+}
+
QTEST_MAIN(tst_QQmlDelegateModel)
#include "tst_qqmldelegatemodel.moc"
--
2.39.0
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