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Merge pull request #14426 from ElderOrb/FB19400

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FB19400 during shutdown -- TypeError: Cannot read property 'buttons' of null
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Jeff Clinton 2018-12-06 11:18:39 -08:00 committed by GitHub
commit 43f84a9577
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 26 additions and 5 deletions
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4
interface/resources/qml/hifi/Desktop.qml
View file

@ -70,8 +70,8 @@ OriginalDesktop.Desktop {
anchors.horizontalCenter: settings.constrainToolbarToCenterX ? desktop.horizontalCenter : undefined;
// Literal 50 is overwritten by settings from previous session, and sysToolbar.x comes from settings when not constrained.
x: sysToolbar.x
buttonModel: tablet.buttons;
shown: tablet.toolbarMode;
buttonModel: tablet ? tablet.buttons : null;
shown: tablet ? tablet.toolbarMode : false;
}
Settings {

4
interface/resources/qml/hifi/tablet/TabletHome.qml
View file

@ -115,9 +115,9 @@ Item {
property int previousIndex: -1
Repeater {
id: pageRepeater
model: Math.ceil(tabletProxy.buttons.rowCount() / TabletEnums.ButtonsOnPage)
model: tabletProxy != null ? Math.ceil(tabletProxy.buttons.rowCount() / TabletEnums.ButtonsOnPage) : 0
onItemAdded: {
item.proxyModel.sourceModel = tabletProxy.buttons;
item.proxyModel.sourceModel = tabletProxy != null ? tabletProxy.buttons : null;
item.proxyModel.pageIndex = index;
}

4
libraries/qml/src/qml/OffscreenSurface.cpp
View file

@ -389,6 +389,10 @@ void OffscreenSurface::finishQmlLoad(QQmlComponent* qmlComponent,
}
// Allow child windows to be destroyed from JS
QQmlEngine::setObjectOwnership(newObject, QQmlEngine::JavaScriptOwnership);
// add object to the manual deletion list
_sharedObject->addToDeletionList(newObject);
newObject->setParent(parent);
newItem->setParentItem(parent);
} else {

15
libraries/qml/src/qml/impl/SharedObject.cpp
View file

@ -15,6 +15,7 @@
#include <QtQml/QQmlEngine>
#include <QtGui/QOpenGLContext>
#include <QPointer>
#include <NumericalConstants.h>
#include <shared/NsightHelpers.h>
@ -96,6 +97,15 @@ SharedObject::~SharedObject() {
}
#endif
// already deleted objects will be reset to null by QPointer so it should be safe just iterate here
for (auto qmlObject : _deletionList) {
if (qmlObject) {
// manually delete not-deleted-yet qml items
QQmlEngine::setObjectOwnership(qmlObject, QQmlEngine::CppOwnership);
delete qmlObject;
}
}
if (_rootItem) {
delete _rootItem;
_rootItem = nullptr;
@ -412,6 +422,11 @@ bool SharedObject::fetchTexture(TextureAndFence& textureAndFence) {
return true;
}
void hifi::qml::impl::SharedObject::addToDeletionList(QObject * object)
{
_deletionList.append(QPointer<QObject>(object));
}
void SharedObject::setProxyWindow(QWindow* window) {
#ifndef DISABLE_QML
_proxyWindow = window;

4
libraries/qml/src/qml/impl/SharedObject.h
View file

@ -66,7 +66,7 @@ public:
void resume();
bool isPaused() const;
bool fetchTexture(TextureAndFence& textureAndFence);
void addToDeletionList(QObject* object);
private:
bool event(QEvent* e) override;
@ -91,6 +91,8 @@ private:
void onAboutToQuit();
void updateTextureAndFence(const TextureAndFence& newTextureAndFence);
QList<QPointer<QObject>> _deletionList;
// Texture management
TextureAndFence _latestTextureAndFence{ 0, 0 };
QQuickItem* _item{ nullptr };