Re: [Interest] Updating a model re-add everything in QML. How can i prevent that?
Den 08-11-2012 01:33, Mark skrev: Hi, I have a models in C++ (a QStringList actually). In QML i'm displaying it using a repeater. Now when i remove some items from the end of the list (which happens quite a few times) then the entire list seems to go through the QML repeater again. What i want to do is put a QStringList in a QML Repeater (works), but when i remove items from the end i would like QML to be smart and also remove the items from the end and leave those that haven't changed. Thus not re-inserting all the items in the repeater when not needed. Is there some option to get that? To do this you need a better model than a QStringList in Repeater. Take a look at QStringListModel instead. But if you just call setStringList() you won't see any improvement. You have to use insertRows and removeRows instead. Bo Thorsen. Come by my DevDays talk in Berlin - Designing for testability. Learn how to build and run your unit tests with the Qt application. Fionia Software - Qt experts for hire. ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] QTreeView width with scroll bar
Sent: Thursday, 8 November 2012 6:40 PM
On 2012/11/08 09:23 AM, Alex Strickland wrote:
However, when the QTreeView gets long enough to automatically add a
scroll bar - my calculations don't work and one of the check box
columns is obscured by the scrollbar. How can I check if the scroll
bar is activated and, if so, obtain it's width to factor into my
calculation?
I should write the message and just not send it... :
class CrossTabTreeView : public QTreeView {
public:
CrossTabTreeView(QWidget* parent = 0) : QTreeView(parent) {}
void resizeEvent(QResizeEvent* /*event - suppress unused warning*/)
{
if (model()-columnCount() == CrossTabView::ColumnCount) {
int scrollBarWidth = 0;
QScrollBar* scrollBar = verticalScrollBar();
if (scrollBar) {
if (scrollBar-isVisible())
scrollBarWidth = scrollBar-width();
}
resizeColumnToContents(CrossTabView::RowColumn);
resizeColumnToContents(CrossTabView::ColumnColumn);
setColumnWidth(CrossTabView::QuestionColumn,
width() - columnWidth(CrossTabView::RowColumn)
- columnWidth(CrossTabView::ColumnColumn) -
scrollBarWidth);
}
}
};
--
Regards
Alex
Hi Alex,
The QAbstractScrollArea docs are a bit vague. Many of the standard event
handlers are overloaded to be called when the viewport (sub) widget gets the
events. The docs don't say what happens to the normal events for
QAbstractScrollArea. When a resize occurs, does resizeEvent only get called
once for the viewport, or twice? If twice, how do we know which widget the
event is for?
Instead of width() - scrollBarWidth, I suggest to use viewport()-width(),
which should already exclude the vertical scroll bar.
Tony.
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[Interest] Qt 4.8.3 MinGW 4.4.0 undefined reference to WinMain@16 with TEMPLATE = lib
Hi, I'm getting undefined references to WinMain@16 when building my libraries with Qt 4.8.3 using the provided MinGW 4.4.0 toolchain. I did some searching but all I could find was QTBUG-27227, which isn't very helpful since I don't want to build in the source tree. I don't mind hacking on the mkspecs if that's the issue, but I can't find any info on how to fix this issue locally. Is it a qmake issue? How can I fix it? Cheers, ~ andy.f ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] compiling qt with eglfs
On 11/08/2012 01:55 PM, pritam.ghang...@gmail.com wrote: I am still stuck with qt 4.8.3 with qpa. It always compiles, but I never got it to work. Now when i try the application its failing at load time itself # ./hellogl_es2 -qpa -platform egl Failed to load platform plugin egl. Available platforms are: Minimal if I try Minimal, I get a segfault. ./hellogl_es2 -qpa -platform Minimal Segmentation fault backtrace from gdb shows that it crashes in QGLContext::chooseContext(QGLContext const*) () The minimal plugin doesn't support OpenGL. I have no idea what to do next. why didn't I get eglfs plugin when I had specified -egl in configure. Try specifying -eglfs and -opengl es2 when running configure and see what the configure output says. -- Samuel ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] compiling qt with eglfs
On Thu, Nov 8, 2012 at 8:00 PM, Samuel Rødal samuel.ro...@digia.com wrote: On 11/08/2012 01:55 PM, pritam.ghang...@gmail.com wrote: I am still stuck with qt 4.8.3 with qpa. It always compiles, but I never got it to work. Now when i try the application its failing at load time itself # ./hellogl_es2 -qpa -platform egl Failed to load platform plugin egl. Available platforms are: Minimal if I try Minimal, I get a segfault. ./hellogl_es2 -qpa -platform Minimal Segmentation fault backtrace from gdb shows that it crashes in QGLContext::chooseContext(QGLContext const*) () The minimal plugin doesn't support OpenGL. I have no idea what to do next. why didn't I get eglfs plugin when I had specified -egl in configure. Try specifying -eglfs and -opengl es2 when running configure and see what the configure output says. I will try that tomorrow. I had tried specifying -qpa eglfs. But that didnt help. I compiled by actually going to src/plugins/platforms/eglfs. Surprisingly makefile was there. The build system ran qmake on it, but somehow never ran make. Right now I dont have board to test it. I will get board again tomorrow. I will test it and let you know. -- Samuel ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest -- cheers, pritam ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] debug QtService
From: Sergey sh0...@gmail.com
Hello, all
I'm developing windows web service using QtService.
To debug it, I launch program in VS2005 debugger with -e argument.
It starts in console mode and handles requests.
How can I emulate stopping the service, so that all code, which is
working usually when windows stops the service?
I want to make web service method, requesing which I would tell service
to stop.
void RequestMapper::service(HttpRequest request, HttpResponse response) {
QByteArray path=request.getPath();
#ifdef _DEBUG
if (path.startsWith(/stop)) {
//QCoreApplication::instance()-exit(); // this leads to error
in HttpConnectionHandler::run() in line:
moveToThread(QCoreApplication::instance()-thread());
How to emulate stopping the service here, so that program, running with
-e argument would stop normally, as it stops when running as windows
service?
}
#endif
}
You'll have to look up the Windows headers you'll need, but you want to use the
Debug() Win32 function.
It triggers the Debugger to run.
The best way to use it is to call it early in the life of the service so you
can connect the service with VS in a controlled manner, and then set the break
point where you want it and continue to run it.
Ben
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Re: [Interest] Updating a model re-add everything in QML. How can i prevent that?
Are you really using this?
qRegisterMetaTypePathModel*(PathModel*);(with the * in
the string)
I guess it should be
qRegisterMetaTypePathModel*(PathModel);
On Thu, Nov 8, 2012 at 10:36 AM, Mark mark...@gmail.com wrote:
On Thu, Nov 8, 2012 at 10:34 AM, Bo Thorsen b...@fioniasoftware.dk wrote:
Den 08-11-2012 01:33, Mark skrev:
Hi,
I have a models in C++ (a QStringList actually). In QML i'm displaying
it using a repeater. Now when i remove some items from the end of the
list (which happens quite a few times) then the entire list seems to
go through the QML repeater again.
What i want to do is put a QStringList in a QML Repeater (works), but
when i remove items from the end i would like QML to be smart and
also remove the items from the end and leave those that haven't
changed. Thus not re-inserting all the items in the repeater when not
needed.
Is there some option to get that?
To do this you need a better model than a QStringList in Repeater. Take
a look at QStringListModel instead. But if you just call setStringList()
you won't see any improvement. You have to use insertRows and removeRows
instead.
Bo Thorsen.
Come by my DevDays talk in Berlin - Designing for testability. Learn how
to build and run your unit tests with the Qt application.
Fionia Software - Qt experts for hire.
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Thanks a lot for that, that will probably work.
However, i'm hitting another issue when trying to make a custom
StringListModel (only due to setRoleNames...) This is how it looks:
// pathmodel.h
#ifndef PATHMODEL_H
#define PATHMODEL_H
#include QStringListModel
class PathModel : public QStringListModel
{
public:
PathModel();
};
Q_DECLARE_METATYPE(PathModel*)
#endif // PATHMODEL_H
// pathmodel.cpp
#include pathmodel.h
PathModel::PathModel()
{
QHashint,QByteArray roleNames;
roleNames.insert(Qt::DisplayRole, modelData);
setRoleNames(roleNames);
}
Now if i want to register the new meta type using:
qRegisterMetaTypePathModel*(PathModel*);
The app instantly crashes when i run it.. It must be something very
obvious that i'm missing, but i don't see it.
Any idea what i'm doing wrong?
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Re: [Interest] Updating a model re-add everything in QML. How can i prevent that?
On Thu, Nov 8, 2012 at 6:43 PM, Nicolás Ulrich nikola...@gmail.com wrote:
Are you really using this?
qRegisterMetaTypePathModel*(PathModel*);(with the * in
the string)
I guess it should be
qRegisterMetaTypePathModel*(PathModel);
On Thu, Nov 8, 2012 at 10:36 AM, Mark mark...@gmail.com wrote:
On Thu, Nov 8, 2012 at 10:34 AM, Bo Thorsen b...@fioniasoftware.dk wrote:
Den 08-11-2012 01:33, Mark skrev:
Hi,
I have a models in C++ (a QStringList actually). In QML i'm displaying
it using a repeater. Now when i remove some items from the end of the
list (which happens quite a few times) then the entire list seems to
go through the QML repeater again.
What i want to do is put a QStringList in a QML Repeater (works), but
when i remove items from the end i would like QML to be smart and
also remove the items from the end and leave those that haven't
changed. Thus not re-inserting all the items in the repeater when not
needed.
Is there some option to get that?
To do this you need a better model than a QStringList in Repeater. Take
a look at QStringListModel instead. But if you just call setStringList()
you won't see any improvement. You have to use insertRows and removeRows
instead.
Bo Thorsen.
Come by my DevDays talk in Berlin - Designing for testability. Learn how
to build and run your unit tests with the Qt application.
Fionia Software - Qt experts for hire.
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Thanks a lot for that, that will probably work.
However, i'm hitting another issue when trying to make a custom
StringListModel (only due to setRoleNames...) This is how it looks:
// pathmodel.h
#ifndef PATHMODEL_H
#define PATHMODEL_H
#include QStringListModel
class PathModel : public QStringListModel
{
public:
PathModel();
};
Q_DECLARE_METATYPE(PathModel*)
#endif // PATHMODEL_H
// pathmodel.cpp
#include pathmodel.h
PathModel::PathModel()
{
QHashint,QByteArray roleNames;
roleNames.insert(Qt::DisplayRole, modelData);
setRoleNames(roleNames);
}
Now if i want to register the new meta type using:
qRegisterMetaTypePathModel*(PathModel*);
The app instantly crashes when i run it.. It must be something very
obvious that i'm missing, but i don't see it.
Any idea what i'm doing wrong?
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Yes.
But even if i change it to your suggestion it doesn't work. It's all
in the private copy ctor...
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[Interest] How to force a repaint?
Hello All, I am sorry if this sounds like a dumb question, but right now my company has locked us out of getting to the Qt documentation via our ridiculous proxy. Anyway, can anyone tell me of a function or an easy way (other than resizing the widget) to force a Widget to repaint? Thank You, Eric Clark To be fond of something is better than merely to know it, and to find joy in it is better than merely to be fond of it. -- The Analects, Confucius ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] How to force a repaint?
Den 08-11-2012 20:59, Eric Clark skrev: Hello All, I am sorry if this sounds like a dumb question, but right now my company has locked us out of getting to the Qt documentation via our ridiculous proxy. Anyway, can anyone tell me of a function or an easy way (other than resizing the widget) to force a Widget to repaint? Thank You, Eric Clark widget-update(); // Repaint when the event system feels like it widget-repaint(); // Repaint right now 99.9% of the times, you want to use the first one. Bo Thorsen. Come by my DevDays talk in Berlin - Designing for testability. Learn how to build and run your unit tests with the Qt application. Fionia Software - Qt experts for hire. ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
[Interest] Dependency Injection
Hello. What is Dependency Injection Framework more used actually to Qt and C++ ? Any sample ? Thank -- Ing. Yunior Bauta Pentón Dpto: PostgreSQL/DATEC Universidad de las Ciencias Informáticas http://postgresql.uci.cu 10mo. ANIVERSARIO DE LA CREACION DE LA UNIVERSIDAD DE LAS CIENCIAS INFORMATICAS... CONECTADOS AL FUTURO, CONECTADOS A LA REVOLUCION http://www.uci.cu http://www.facebook.com/universidad.uci http://www.flickr.com/photos/universidad_uci ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] How to force a repaint?
Thank you Bo! From: interest-bounces+eclark=ara@qt-project.org [mailto:interest-bounces+eclark=ara@qt-project.org] On Behalf Of Bo Thorsen Sent: Thursday, November 08, 2012 2:09 PM To: interest@qt-project.org Subject: Re: [Interest] How to force a repaint? Den 08-11-2012 20:59, Eric Clark skrev: Hello All, I am sorry if this sounds like a dumb question, but right now my company has locked us out of getting to the Qt documentation via our ridiculous proxy. Anyway, can anyone tell me of a function or an easy way (other than resizing the widget) to force a Widget to repaint? Thank You, Eric Clark widget-update(); // Repaint when the event system feels like it widget-repaint(); // Repaint right now 99.9% of the times, you want to use the first one. Bo Thorsen. Come by my DevDays talk in Berlin - Designing for testability. Learn how to build and run your unit tests with the Qt application. Fionia Software - Qt experts for hire. ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] Updating a model re-add everything in QML. How can i prevent that?
I got this and it seems to work fine (Qt 4.8), but it's not a model. I
remember a similar problem with the constructor but I think it was
because I was using Q_DECLARE_METATYPE(MyClass) instead of
Q_DECLARE_METATYPE(MyClass*).
--
MyClass.h
--
#ifndef MYCLASS_H
#define MYCLASS_H
#include QObject
#include QVariant // needed for Q_DECLARE_METATYPE
class MyClass : public QObject
{
Q_OBJECT
public:
explicit MyClass(QObject *parent = 0);
~MyClass();
signals:
public slots:
private:
};
Q_DECLARE_METATYPE(MyClass*)
#endif // MYCLASS_H
main.cpp
#include QtDeclarative // needed for qmlRegisterType
int main(int argc, char** argv)
{
QApplication app(argc, argv);
qmlRegisterTypeMyClass(MyClass, 1, 0, MyClass);
...
-
QML
-
import MyClass 1.0
...
MyClass {}
On Thu, Nov 8, 2012 at 3:09 PM, Mark mark...@gmail.com wrote:
On Thu, Nov 8, 2012 at 6:43 PM, Nicolás Ulrich nikola...@gmail.com wrote:
Are you really using this?
qRegisterMetaTypePathModel*(PathModel*);(with the * in
the string)
I guess it should be
qRegisterMetaTypePathModel*(PathModel);
On Thu, Nov 8, 2012 at 10:36 AM, Mark mark...@gmail.com wrote:
On Thu, Nov 8, 2012 at 10:34 AM, Bo Thorsen b...@fioniasoftware.dk wrote:
Den 08-11-2012 01:33, Mark skrev:
Hi,
I have a models in C++ (a QStringList actually). In QML i'm displaying
it using a repeater. Now when i remove some items from the end of the
list (which happens quite a few times) then the entire list seems to
go through the QML repeater again.
What i want to do is put a QStringList in a QML Repeater (works), but
when i remove items from the end i would like QML to be smart and
also remove the items from the end and leave those that haven't
changed. Thus not re-inserting all the items in the repeater when not
needed.
Is there some option to get that?
To do this you need a better model than a QStringList in Repeater. Take
a look at QStringListModel instead. But if you just call setStringList()
you won't see any improvement. You have to use insertRows and removeRows
instead.
Bo Thorsen.
Come by my DevDays talk in Berlin - Designing for testability. Learn how
to build and run your unit tests with the Qt application.
Fionia Software - Qt experts for hire.
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Thanks a lot for that, that will probably work.
However, i'm hitting another issue when trying to make a custom
StringListModel (only due to setRoleNames...) This is how it looks:
// pathmodel.h
#ifndef PATHMODEL_H
#define PATHMODEL_H
#include QStringListModel
class PathModel : public QStringListModel
{
public:
PathModel();
};
Q_DECLARE_METATYPE(PathModel*)
#endif // PATHMODEL_H
// pathmodel.cpp
#include pathmodel.h
PathModel::PathModel()
{
QHashint,QByteArray roleNames;
roleNames.insert(Qt::DisplayRole, modelData);
setRoleNames(roleNames);
}
Now if i want to register the new meta type using:
qRegisterMetaTypePathModel*(PathModel*);
The app instantly crashes when i run it.. It must be something very
obvious that i'm missing, but i don't see it.
Any idea what i'm doing wrong?
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Yes.
But even if i change it to your suggestion it doesn't work. It's all
in the private copy ctor...
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Re: [Interest] Carbon/Cocoa - browserplugin
I am working on updating the qtbrowserplugin in order to make it running with current Qt versions. Regarding the MAC version that requires a Cocoa version besides the current Carbon solution. In order to get started: When trying to compile the current version I get these errors: ../src/qtbrowserplugin_mac.cpp: In constructor ‘QMacBrowserRoot::QMacBrowserRoot(OpaqueControlRef*)’: ../src/qtbrowserplugin_mac.cpp:55: error: ‘HIViewGetWindow’ was not declared in this scope You are using Cocoa Qt instead of Carbon. Of course I do and as mentioned previously I now want to get this example working for Cocoa, which obviously requires a number of changes. So - actually the questions is what are the Cocoa-equivalet calls ? Any idea ? Thanks Alex -- http://www.carot.de http://www.triologue.de Email : alexan...@carot.de Tel.: +49 (0)177 5719797 ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] Dependency Injection
http://en.wikipedia.org/wiki/Dependency_injection On Thu, Nov 8, 2012 at 12:44 PM, Yunior Bauta Pentón ypen...@uci.cu wrote: Hello. What is Dependency Injection Framework more used actually to Qt and C++ ? Any sample ? Thank -- Ing. Yunior Bauta Pentón Dpto: PostgreSQL/DATEC Universidad de las Ciencias Informáticas http://postgresql.uci.cu http://www.uci.cu/ ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] Why is this not working? Assign direct to QML (through setContextProperty) works, as function doesn't.
On Thu, Nov 8, 2012 at 1:19 PM, Mark mark...@gmail.com wrote: Note: i cannot do qRegisterMetaType on the PathModel since it's class that inherits from a class that forbids copying the data (copy constructor stuff). qmlRegisterType can register classes derived from QObject. Although you're actually going to register a pointer to that type, rather than the class itself. From http://qt-project.org/doc/qt-4.8/qml-extending.html Custom C++ types are registered using a template function: templatetypename T int qmlRegisterType http://qt-project.org/doc/qt-4.8/qdeclarativeengine.html#qmlRegisterType(const char *uri, int versionMajor, int versionMinor, const char *qmlName) Calling qmlRegisterTypehttp://qt-project.org/doc/qt-4.8/qdeclarativeengine.html#qmlRegisterType() registers the C++ type *T* with the QML system, and makes it available in QML under the name *qmlName* in library *uri* version * versionMajor.versionMinor*. The *qmlName* can be the same as the C++ type name. ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] Why is this not working? Assign direct to QML (through setContextProperty) works, as function doesn't.
On Fri, Nov 9, 2012 at 1:01 AM, Alan Ezust alan.ez...@gmail.com wrote: On Thu, Nov 8, 2012 at 1:19 PM, Mark mark...@gmail.com wrote: Note: i cannot do qRegisterMetaType on the PathModel since it's class that inherits from a class that forbids copying the data (copy constructor stuff). qmlRegisterType can register classes derived from QObject. Although you're actually going to register a pointer to that type, rather than the class itself. From http://qt-project.org/doc/qt-4.8/qml-extending.html Custom C++ types are registered using a template function: templatetypename T int qmlRegisterType(const char *uri, int versionMajor, int versionMinor, const char *qmlName) Calling qmlRegisterType() registers the C++ type T with the QML system, and makes it available in QML under the name qmlName in library uri version versionMajor.versionMinor. The qmlName can be the same as the C++ type name. Hi Alan, Thank you for your reply. I do wonder though, isn't qmlRegisterType for registering custom QML elements? Since that's not what i'm trying to do. I only try to make an object usable in QML. Something that works if i send it to QML directly using setContextProperty but doesn't work if i send a class and call a function with the object i want (the function pathModel() in the example from my first post. ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] Why is this not working? Assign direct to QML (through setContextProperty) works, as function doesn't.
Sent: Friday, 9 November 2012 8:19 AM
Hi,
Lets take this (pseudo code) as example.
I made a custom QStringListModel class and calles it PathModel:
pathmodel.h
class PathModel : public QStringListModel {
public:
explicit PathModel(QObject *parent = 0); };
Then i made a custom utils class where i just make some random
functionality available. Like so:
util.h
class Util : public QObject
{
Q_OBJECT
public:
Q_INVOKABLE PathModel* pathModel();
Q_INVOKABLE QString testString() { return some_test_text; }
};
Then i have the main file where i create the QML context and load a QML
file.
Just the default stuff when you make a QML application through QtCreator.
It looks like this:
Q_DECL_EXPORT int main(int argc, char *argv[]) {
QScopedPointerQApplication app(createApplication(argc, argv));
QmlApplicationViewer viewer;
viewer.setOrientation(QmlApplicationViewer::ScreenOrientationAuto);
viewer.setMainQmlFile(QLatin1String(qml/Porpoise/main.qml));
viewer.showExpanded();
return app-exec();
}
The above helps understanding the context. In the above you can already
see that i want to send the Util class to QML. I do that like
so:
Util util;
viewer.rootContext()-setContextProperty(Util, util);
Now in QML i call:
Util.testString()
Reply: some_test_text
That is es expected. Nothing wrong.
Now if i call:
Util.pathModel()
Reply: undefined
UNDEFINED..! Why?
If i do this:
viewer.rootContext()-setContextProperty(PathModel, Util.pathModel());
and then call it in QML like so:
PathModel
Reply: QStringListModel(0x2072430)
QStringListModel is OK since PathModel inherits from that. So assigning it
directly to QML works, but assigning it through some other class doesn't.
Can
anyone tell me why that's the case? And more importantly, how can i fix
this?
Note: i cannot do qRegisterMetaType on the PathModel since it's class that
inherits from a class that forbids copying the data (copy constructor
stuff).
Cheers,
Mark
Hi Mark,
Try adding Q_OBJECT to your PathModel - maybe the function doesn't work
because the returned value does not have its own moc object.
Tony.
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Re: [Interest] Why is this not working? Assign direct to QML (through setContextProperty) works, as function doesn't.
On Fri, Nov 9, 2012 at 3:36 AM, Tony Rietwyk t...@rightsoft.com.au wrote:
Sent: Friday, 9 November 2012 8:19 AM
Hi,
Lets take this (pseudo code) as example.
I made a custom QStringListModel class and calles it PathModel:
pathmodel.h
class PathModel : public QStringListModel {
public:
explicit PathModel(QObject *parent = 0); };
Then i made a custom utils class where i just make some random
functionality available. Like so:
util.h
class Util : public QObject
{
Q_OBJECT
public:
Q_INVOKABLE PathModel* pathModel();
Q_INVOKABLE QString testString() { return some_test_text; }
};
Then i have the main file where i create the QML context and load a QML
file.
Just the default stuff when you make a QML application through QtCreator.
It looks like this:
Q_DECL_EXPORT int main(int argc, char *argv[]) {
QScopedPointerQApplication app(createApplication(argc, argv));
QmlApplicationViewer viewer;
viewer.setOrientation(QmlApplicationViewer::ScreenOrientationAuto);
viewer.setMainQmlFile(QLatin1String(qml/Porpoise/main.qml));
viewer.showExpanded();
return app-exec();
}
The above helps understanding the context. In the above you can already
see that i want to send the Util class to QML. I do that like
so:
Util util;
viewer.rootContext()-setContextProperty(Util, util);
Now in QML i call:
Util.testString()
Reply: some_test_text
That is es expected. Nothing wrong.
Now if i call:
Util.pathModel()
Reply: undefined
UNDEFINED..! Why?
If i do this:
viewer.rootContext()-setContextProperty(PathModel, Util.pathModel());
and then call it in QML like so:
PathModel
Reply: QStringListModel(0x2072430)
QStringListModel is OK since PathModel inherits from that. So assigning it
directly to QML works, but assigning it through some other class doesn't.
Can
anyone tell me why that's the case? And more importantly, how can i fix
this?
Note: i cannot do qRegisterMetaType on the PathModel since it's class that
inherits from a class that forbids copying the data (copy constructor
stuff).
Cheers,
Mark
Hi Mark,
Try adding Q_OBJECT to your PathModel - maybe the function doesn't work
because the returned value does not have its own moc object.
Tony.
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Hi Tony,
Ahh, i was really hoping for that to work! Sadly i was welcomed with
this compiler error:
pathmodel.o: In function `PathModel::PathModel(QObject*)':
pathmodel.cpp:(.text+0x14): undefined reference to `vtable for PathModel'
class PathModel : public QStringListModel
Cheers,
Mark
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Re: [Interest] Why is this not working? Assign direct to QML (through setContextProperty) works, as function doesn't.
On 09/11/12 12:56, Mark wrote: Ahh, i was really hoping for that to work! Sadly i was welcomed with this compiler error: pathmodel.o: In function `PathModel::PathModel(QObject*)': pathmodel.cpp:(.text+0x14): undefined reference to `vtable for PathModel' You need to run qmake to regenerate the Makefile because moc didn't run (because the last time qmake ran, the Q_OBJECT macro wasn't there). -- Link ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
[Interest] Fwd: compiling qt with eglfs
sorry, missed the list in reply. On Thu, Nov 8, 2012 at 8:06 PM, pritam.ghang...@gmail.com pritam.ghang...@gmail.com wrote: On Thu, Nov 8, 2012 at 8:00 PM, Samuel Rødal samuel.ro...@digia.comwrote: On 11/08/2012 01:55 PM, pritam.ghang...@gmail.com wrote: I am still stuck with qt 4.8.3 with qpa. It always compiles, but I never got it to work. Now when i try the application its failing at load time itself # ./hellogl_es2 -qpa -platform egl Failed to load platform plugin egl. Available platforms are: Minimal if I try Minimal, I get a segfault. ./hellogl_es2 -qpa -platform Minimal Segmentation fault backtrace from gdb shows that it crashes in QGLContext::chooseContext(QGLContext const*) () The minimal plugin doesn't support OpenGL. I have no idea what to do next. why didn't I get eglfs plugin when I had specified -egl in configure. Try specifying -eglfs and -opengl es2 when running configure and see what the configure output says. -eglfs was not recognized by configure as a valid option. I will try that tomorrow. I had tried specifying -qpa eglfs. But that didnt help. I compiled by actually going to src/plugins/platforms/eglfs. Surprisingly makefile was there. The build system ran qmake on it, but somehow never ran make. Right now I dont have board to test it. I will get board again tomorrow. I will test it and let you know. I have the plugin manually compiled. It loads but fails to create surface. Could not create the egl surface: error = 0x300b I think I need to do some platform specific patching in plugin. I am looking into that now. -- Samuel ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest -- cheers, pritam -- pritam -- pritam ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
Re: [Interest] How to force a repaint?
Op 8-11-2012 20:59, Eric Clark schreef: Hello All, I am sorry if this sounds like a dumb question, but right now my company has locked us out of getting to the Qt documentation via our ridiculous proxy. I hate those companies, but did they even block hitting F1 in Creator? Usually, the documentation is installed with your Qt version too, so you should be able to read it that way if not online. André ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
