Re: [Qt-qml] How to simulate mouse event
We handle mouse release in our tests without any problem. Are you able to
provide a runable example?
BR,
Martin.
From: Wangbing Kevin (Nokia-MS/Beijing)
Sent: Tuesday, 14 December 2010 2:19 PM
To: Jones Martin (Nokia-MS-Qt/Brisbane); qt-qml@trolltech.com
Subject: RE: How to simulate mouse event
Hi Martin,
Thanks for your great suggestion!
The most mouse events can be simulated successfully except
GraphicsSceneMouseRelease event.
The onReleased handler still cannot be triggered.
What's the matter?
Hope you or others can help me again, thank you!
BR,
Kevin Wang
From: Jones Martin (Nokia-MS-Qt/Brisbane)
Sent: Tuesday, December 14, 2010 7:58 AM
To: Wangbing Kevin (Nokia-MS/Beijing); qt-qml@trolltech.com
Subject: RE: How to simulate mouse event
We do this in the MouseArea autotests:
QGraphicsScene *scene = canvas-scene();
QGraphicsSceneMouseEvent pressEvent(QEvent::GraphicsSceneMousePress);
pressEvent.setScenePos(QPointF(100, 100));
pressEvent.setButton(Qt::LeftButton);
pressEvent.setButtons(Qt::LeftButton);
QApplication::sendEvent(scene, pressEvent);
Keep in mind that the position set above is in scene coordinates.
BR,
Martin.
From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On
Behalf Of Wangbing Kevin (Nokia-MS/Beijing)
Sent: Monday, 13 December 2010 7:46 PM
To: qt-qml@trolltech.com
Subject: [Qt-qml] How to simulate mouse event
Hi,
I'm a freshman on qml plug-in development.
I want to simulate key and mouse events for testing my qml script automatically.
Now, I can simulate the key event successfully by
item-scene()-sendEvent(item, keyEvent);
But it cannot work when I call item-scene()-sendEvent(item, mouseEvent);
to simulate mouse event.
I've tried another way QApplication::sendEvent(view, mouseEvent);, but it
still cannot work.
The return value is always false.
My qml script is follow, it can output log when I click actual mouse key.
Rectangle {
id: container
..
MouseArea {
id: mouseArea
anchors.fill: parent
onClicked: {
mouse.accepted = true;
console.log(Mouse Clicked! key: + mouse.button + | keys: +
mouse.buttons);
}
}
Do you have any suggestion?
Best Regards,
Kevin Wang
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Re: [Qt-qml] How to simulate mouse event
Yes, that makes sense. QGraphicsView uses the press event to determine which
item will get subsequent mouse events.
BR,
Martin.
From: Wangbing Kevin (Nokia-MS/Beijing)
Sent: Tuesday, 14 December 2010 4:52 PM
To: Jones Martin (Nokia-MS-Qt/Brisbane); qt-qml@trolltech.com
Subject: RE: How to simulate mouse event
Hi Martin,
I've done some tests for the mouse event simulation and found a rule:
The mouse release event cannot be sent singly, it must be paired with a mouse
press event and a mouse click event will be send by system automatically.
So I cannot send a single mouse release event to any object, it's right?
BR,
Kevin Wang
From: Jones Martin (Nokia-MS-Qt/Brisbane)
Sent: Tuesday, December 14, 2010 1:26 PM
To: Wangbing Kevin (Nokia-MS/Beijing); qt-qml@trolltech.com
Subject: RE: How to simulate mouse event
We handle mouse release in our tests without any problem. Are you able to
provide a runable example?
BR,
Martin.
From: Wangbing Kevin (Nokia-MS/Beijing)
Sent: Tuesday, 14 December 2010 2:19 PM
To: Jones Martin (Nokia-MS-Qt/Brisbane); qt-qml@trolltech.com
Subject: RE: How to simulate mouse event
Hi Martin,
Thanks for your great suggestion!
The most mouse events can be simulated successfully except
GraphicsSceneMouseRelease event.
The onReleased handler still cannot be triggered.
What's the matter?
Hope you or others can help me again, thank you!
BR,
Kevin Wang
From: Jones Martin (Nokia-MS-Qt/Brisbane)
Sent: Tuesday, December 14, 2010 7:58 AM
To: Wangbing Kevin (Nokia-MS/Beijing); qt-qml@trolltech.com
Subject: RE: How to simulate mouse event
We do this in the MouseArea autotests:
QGraphicsScene *scene = canvas-scene();
QGraphicsSceneMouseEvent pressEvent(QEvent::GraphicsSceneMousePress);
pressEvent.setScenePos(QPointF(100, 100));
pressEvent.setButton(Qt::LeftButton);
pressEvent.setButtons(Qt::LeftButton);
QApplication::sendEvent(scene, pressEvent);
Keep in mind that the position set above is in scene coordinates.
BR,
Martin.
From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On
Behalf Of Wangbing Kevin (Nokia-MS/Beijing)
Sent: Monday, 13 December 2010 7:46 PM
To: qt-qml@trolltech.com
Subject: [Qt-qml] How to simulate mouse event
Hi,
I'm a freshman on qml plug-in development.
I want to simulate key and mouse events for testing my qml script automatically.
Now, I can simulate the key event successfully by
item-scene()-sendEvent(item, keyEvent);
But it cannot work when I call item-scene()-sendEvent(item, mouseEvent);
to simulate mouse event.
I've tried another way QApplication::sendEvent(view, mouseEvent);, but it
still cannot work.
The return value is always false.
My qml script is follow, it can output log when I click actual mouse key.
Rectangle {
id: container
..
MouseArea {
id: mouseArea
anchors.fill: parent
onClicked: {
mouse.accepted = true;
console.log(Mouse Clicked! key: + mouse.button + | keys: +
mouse.buttons);
}
}
Do you have any suggestion?
Best Regards,
Kevin Wang
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Re: [Qt-qml] How to ignore MouseArea signals
This behavior is inherited from QGraphicsView. I don't know why it is this way. Perhaps the QGraphicsView documentation has some hints. BR, Martin. -Original Message- From: ext Adriano Rezende [mailto:adriano.reze...@openbossa.org] Sent: Friday, 10 December 2010 12:02 AM To: Pasion Jerome (Nokia-MS-Qt/Oslo) Cc: halton@intel.com; Jones Martin (Nokia-MS-Qt/Brisbane); qt- q...@trolltech.com Subject: Re: [Qt-qml] How to ignore MouseArea signals On Thu, Dec 9, 2010 at 10:36 AM, jerome.pas...@nokia.com wrote: Hello, Is there a reason why accepted isn't handled in the other mouse events? I believe the reason is that after accepting mouse press event that item becomes the mouse grabber and mouse move/released events will be delivered directly to it. The grabber condition can be removed calling ungrabMouse() manually. Br, Adriano ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] PathView Delegates Not Always Displaying
This one I can reproduce. I've reopened the bug. http://bugreports.qt.nokia.com/browse/QTBUG-15926 Thanks, Martin. -Original Message- From: ext Michael Dippold [mailto:m...@dippold.com] Sent: Friday, 10 December 2010 2:30 AM To: Jones Martin (Nokia-MS-Qt/Brisbane) Cc: qt-qml@trolltech.com Subject: Re: [Qt-qml] PathView Delegates Not Always Displaying Sorry, I guess I had to upgrade my glib libraries to build the latest. I have now built the latest and it seems to fix part of my issue but I am still having some trouble. With the following example, line 19: carousel.currentIndex = 0; Does not appear to cause the path to redraw the delegates. Steps: 1) After loading click once (7 should now be in the center box.) 2) Click Home which should reload the model which will trigger the currentIndex to be set at 0. You should see that nothing happens when Home is clicked. The currentItem is currently set to 0 but the path is currently displaying a different state. If you click again nothing will happen (now the path is in the state it should be in). Click again and the path will start to move. At line 17 if I set highlightMoveDuration to 10 (maybe anything other than 0) the problem is not visible. Thanks, Mike On 12/7/10, martin.jo...@nokia.com martin.jo...@nokia.com wrote: This is not reproducible using the current Qt 4.7 branch. The 4.7 branch from http://qt.gitorious.org/qt should always build and run. BR, Martin. -Original Message- From: ext Michael Dippold [mailto:m...@dippold.com] Sent: Wednesday, 8 December 2010 2:55 AM To: Jones Martin (Nokia-MS-Qt/Brisbane) Cc: qt-qml@trolltech.com Subject: Re: [Qt-qml] PathView Delegates Not Always Displaying I am using Qt 4.7.1, I just tried compiling from the latest from Git but could not get it to run. I was able to create a simple example on how to duplicate it and created a bug (QTBUG-15926). Hopefully it is reproducible on other systems. Thanks, Mike On Mon, Dec 6, 2010 at 10:20 PM, martin.jo...@nokia.com wrote: Which version of Qt are you using? There have been some fixes in PathView which your bug may be related to. I suggest trying the latest qt/4.7 from git. If you still see the problem then file a bug with an example that can be used to reproduce it (an unreliable example is better than none). BR, Martin. -Original Message- From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On Behalf Of ext Michael Dippold Sent: Tuesday, 7 December 2010 10:52 AM To: qt-qml@trolltech.com Subject: [Qt-qml] PathView Delegates Not Always Displaying I currently have a PathView that is binded to a XmlListModel. I animate the entire path and move it off of the screen, change the query of the XmlListModel to get new data, and then animate the entire path back onto the screen once the XmlListModel status is set to READY. I am having a problem where randomly the PathView will come back into the main window with missing delegates. If I use the mouse to barely move the PathView the delegates immediately get displayed. I have not yet found a way to reliably reproduce the issue. ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] How to ignore MouseArea signals
Log a bug. It would be good if you could suggest where the docs are lacking -
i.e. where you started looking when this didn't work as expected. The
accepted behavior is documented in the MouseArea signal documentation.
BR,
Martin.
-Original Message-
From: ext Halton Huo [mailto:halton@intel.com]
Sent: Wednesday, 8 December 2010 11:56 AM
To: Jones Martin (Nokia-MS-Qt/Brisbane)
Cc: adriano.reze...@openbossa.org; qt-qml@trolltech.com
Subject: RE: [Qt-qml] How to ignore MouseArea signals
Woo, OnPressed works, thanks very much.
The document need to be improved. Any process to do that?
Cheers,
Halton.
On Wed, 2010-12-08 at 09:46 +0800, martin.jo...@nokia.com wrote:
You need to accept in onPressed. accepted is ignored for any other event.
BR,
Martin.
-Original Message-
From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com]
On
Behalf Of ext Halton Huo
Sent: Wednesday, 8 December 2010 11:42 AM
To: Adriano Rezende
Cc: qt-qml@trolltech.com
Subject: Re: [Qt-qml] How to ignore MouseArea signals
enabled does not match my case.
I need receive the MouseArea signals but as well as those below the top
item can receive the signals also.
Refer to MouseEvent element document, seems accepted can do that.
-
accepted : bool
Setting accepted to true prevents the mouse event from being propagated
to items below this item.
Generally, if the item acts on the mouse event then it should be
accepted so that items lower in the stacking order do not also respond
to the same event.
But following code does not work as I wish
MouseArea {
anchors.fill: parent
onClicked: {
console.log(mouse.accepted=+mouse.accepted)
mouse.accepted = false
console.log(mouse.accepted=+mouse.accepted)
}
}
Thanks,
Halton.
On Wed, 2010-12-08 at 02:55 +0800, Adriano Rezende wrote:
On Tue, Dec 7, 2010 at 4:31 AM, Halton Huo halton@intel.com wrote:
So my questions how to ignore the received signals to let other items
to
continue deal with those signals?
You can set enabled property to false or ignore the event on mouse
press.
MouseArea {
anchors.fill: parent
onClicked: console.log(background clicked);
}
MouseArea {
anchors.fill: parent
enabled: false
//onPressed: mouse.accepted = false;
onClicked: console.log(foreground clicked);
}
Br,
Adriano
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Re: [Qt-qml] PathView Delegates Not Always Displaying
Which version of Qt are you using? There have been some fixes in PathView which your bug may be related to. I suggest trying the latest qt/4.7 from git. If you still see the problem then file a bug with an example that can be used to reproduce it (an unreliable example is better than none). BR, Martin. -Original Message- From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On Behalf Of ext Michael Dippold Sent: Tuesday, 7 December 2010 10:52 AM To: qt-qml@trolltech.com Subject: [Qt-qml] PathView Delegates Not Always Displaying I currently have a PathView that is binded to a XmlListModel. I animate the entire path and move it off of the screen, change the query of the XmlListModel to get new data, and then animate the entire path back onto the screen once the XmlListModel status is set to READY. I am having a problem where randomly the PathView will come back into the main window with missing delegates. If I use the mouse to barely move the PathView the delegates immediately get displayed. I have not yet found a way to reliably reproduce the issue. ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] How to expose widget to QML
You may be able to do this via QGraphicsProxyWidget, but as the documentation states: This class is provided for convenience when bridging QWidgets and QGraphicsItems, it should not be used for high-performance scenarios. If you are able then it is better to port the widget's functionality to QDeclarativeItem. BR, Martin. From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On Behalf Of ext vuleetu Sent: Wednesday, 1 December 2010 2:03 PM To: qt-qml@trolltech.com Subject: [Qt-qml] How to expose widget to QML Hi, I can create custom extension which inherit QDeclarativeItem and it works. But i want to using existing widget like QLabel in Qt exposed to qml? Does anyone know how to do this? Best regards. ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] Accessing a QAbstractItemModel in QML outside a view
Right now if you want to access data in your model in script, you will need to
add methods to your model to allow that.
For the specific case of showing data from the currentItem, you can expose the
model data, e.g.
ListView {
Id: list
delegate: Text {
property variant data: model
text: name
}
}
Text { text: list.currentItem.data.name }
BR,
Martin.
-Original Message-
From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On
Behalf Of ext Jan Ekholm
Sent: Wednesday, 1 December 2010 4:55 PM
To: qt-qml@trolltech.com
Subject: [Qt-qml] Accessing a QAbstractItemModel in QML outside a view
Hi,
The subject says it all, apart from the context. Accessing a QAIM in a view
(such
as
a ListView) is all nicely documented and works as expected. However, how can I
access
the same exposed C++ model outside a view? In my case I want to show a list of
data and
next to the list have some Text/Image items with more information about the
selected item
in the view. Totally normal stuff.
Getting the index of the selected row is easy, the view gives me that.
Getting the
model
instance is also easy, it's in the root context. However, getting data out of
the
model seems
to be impossible. I've tried all kinds of ways to access the data but none
works.
However, if
I look here:
http://doc.trolltech.com/4.7/qdeclarativemodels.html#accessing-views-and-models-
from-delegates
it's seems that delegates can even write data to a model. This gives a
somewhat
perverse
situation where you can inside delegates read and write to models but outside
a
delegate
you can't even read data.
So, this can't possibly be the case and there's something my thick brain just
does
not grok?
I mean, models are one of the few ways you can get real data into a QML
document, and not
being able to actually access it makes it all feel somewhat silly. I can make
extra
methods
on my subclassed QAIM on the C++ side to get data, but the point is that I
should
not have
to do that, it ought to just work.
Someone please give me some RTFM resource.
Best regards,
Jan Ekholm
--
Jan Ekholm
jan.ekh...@smultron.net
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Re: [Qt-qml] work with folder property on FolderListModel
The documentation should be sufficient. If it is not then that is a bug. BR, Martin From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On Behalf Of ext Thomas PABST Sent: Friday, 26 November 2010 1:05 AM To: qt-qml@trolltech.com Subject: Re: [Qt-qml] work with folder property on FolderListModel Thanks, that is a good way. Is there a easy way to know all property available with an qml element ? I looked the documentation on http://doc.qt.nokia.com/4.7-snapshot/qml-folderlistmodel.html but it seems not up to date ! The parentFolder property does not appeared on the list. - Thomas PABST thomas.pa...@gmail.commailto:thomas.pa...@gmail.com 2010/11/25 martin.jo...@nokia.commailto:martin.jo...@nokia.com The parent folder is easy to get, since there is a parentFolder property. There is no way to get a directory in the current folder, short of using the model in a repeater, for example. FolderListModel is quite simple and really only designed to allow selecting a file from a list. You could add a suggestion for a more fully featured filesystem model, but for now you will have to extend FolderListModel to suit your needs. Martin. From: qt-qml-boun...@trolltech.commailto:qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.commailto:qt-qml-boun...@trolltech.com] On Behalf Of ext Thomas PABST Sent: Thursday, 25 November 2010 1:31 AM To: qt-qml@trolltech.commailto:qt-qml@trolltech.com Subject: [Qt-qml] work with folder property on FolderListModel Hi, I looking for a way to work with the folder property on a FolderListModel. The folder property is a string oriented in the path management. Is there an easy way to get the parent folder, or get a directory contained in this one ? I saw QUrl Class Reference, but that's only work with C++ ! Thanks - Thomas PABST thomas.pa...@gmail.commailto:thomas.pa...@gmail.com ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] Flickable visibleArea.widthRatio behavior change?
There was no deliberate change and the examples/declarative/ui-components/scrollbar example appears to behave correctly. Can you provide an example of the problem? BR, Martin. -Original Message- From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On Behalf Of Dietrich-De Gabriel (Nokia-MS/Oslo) Sent: Saturday, 27 November 2010 1:28 AM To: qt-qml@trolltech.com Subject: [Qt-qml] Flickable visibleArea.widthRatio behavior change? Hi, I have just noticed that for any Flickable 'visibleArea.widthRatio' only changes when 'width' or 'contentWidth' change. I mean that it remains constant even if the actual contents' visible area is smaller than the viewport area (like when flicking past the boundaries). I seem to remember this what not the case a couple of months ago, but I may be wrong, (Same behavior for 'heightRatio', of course). Can anyone confirm or infirm? Thanks in advance. Best regards, Gabriel de Dietrich ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] QML dynamic loading a memory string?
Unfortunately there is no easy way to add setData() to QDeclarativeView. You'll probably have to make your own QGraphicsView subclass, since QDeclarativeViewPrivate is not exported. You can create an object from a QML string using Qt.createQmlObject(string qml, object parent, string filepath) http://doc.qt.nokia.com/4.7-snapshot/qml-qt.html#dynamic-object-creation Martin. -Original Message- From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On Behalf Of ext Nathan Sent: Wednesday, 24 November 2010 12:59 AM To: qt-qml@trolltech.com Subject: [Qt-qml] QML dynamic loading a memory string? I'm very new to QT QML, so I'm looking for some guidance... After hunting around; I figured out that you can use QDeclarativeComponent, setData to dynamically load a string qml data... So the first question -- Any way to make the QDeclarativeView use setData? The only way I can think of off the top of my head is to somehow make a decendant class of both he QDeclarativeView and the QDeclarativeViewPrivate somehow? In QML is there a way to use the loader or some other component or method to talk to the QDeclarativeComponent to be able to use setData? Or do I need to somehow add setData to the loader class, and if so how? Nathan ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] work with folder property on FolderListModel
The parent folder is easy to get, since there is a parentFolder property. There is no way to get a directory in the current folder, short of using the model in a repeater, for example. FolderListModel is quite simple and really only designed to allow selecting a file from a list. You could add a suggestion for a more fully featured filesystem model, but for now you will have to extend FolderListModel to suit your needs. Martin. From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On Behalf Of ext Thomas PABST Sent: Thursday, 25 November 2010 1:31 AM To: qt-qml@trolltech.com Subject: [Qt-qml] work with folder property on FolderListModel Hi, I looking for a way to work with the folder property on a FolderListModel. The folder property is a string oriented in the path management. Is there an easy way to get the parent folder, or get a directory contained in this one ? I saw QUrl Class Reference, but that's only work with C++ ! Thanks - Thomas PABST thomas.pa...@gmail.commailto:thomas.pa...@gmail.com ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] FolderListModel
The ListView has no height so only one delegate is created. Add anchors.fill:
parent to the ListView.
BR,
Martin.
From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On
Behalf Of ext Thomas PABST
Sent: Tuesday, 23 November 2010 1:19 AM
To: qt-qml@trolltech.com
Subject: [Qt-qml] FolderListModel
Hi,
I'm currently developing a file manager with the new FolderListModel appeared
on Qt 4.7.1.
import QtQuick 1.0
import Qt.labs.folderlistmodel 1.0
Rectangle {
width: 300;
height: 400;
ListView {
FolderListModel {
id: foldermodel
nameFilters: [*]
}
Component {
id: filedelegate
Text { text: fileName }
}
model: foldermodel
delegate: filedelegate
}
However, this example show us only one file. I'm looking for the better way to
show all files.
How can we define the number of the file automatically. Can we do that only
with Qml or we should use both qml/c++ ?
I'm thinking about the Repeater element, ListView element or grid element, but
we must define the number of case each time !
-
Thomas PABST
thomas.pa...@gmail.commailto:thomas.pa...@gmail.com
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Re: [Qt-qml] C++ MyClass to detect child added/removed from QML
QGraphicsItem::itemChange() may do what you want:
http://doc.qt.nokia.com/4.7-snapshot/qgraphicsitem.html#itemChange
Martin.
From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On
Behalf Of ext Charley Bay
Sent: Tuesday, 23 November 2010 12:51 PM
To: qt-qml@trolltech.com
Subject: [Qt-qml] C++ MyClass to detect child added/removed from QML
I'm sure the answer is simple, but I can't find it: I want my C++ implemented
QML object to be notified when children are added:
//FILE: MyFile.qml
import Qt 4.7
import MyCppClass 1.0
Rectangle {
MyCppClass {
id: myCppClass
Text { text: some text } // CHILD NOT DETECTED AS ADDED
}
Text {
text: some other text
parent: myCppClass // CHILD NOT DETECTED AS ADDED
}
}
In both the cases above, I'm unable to find a slot/notification/virtual
function in the C++ implementation of MyCppClass that I can use to detect these
children that are added.
Since MyCppClass derives from QDeclarativeItem, I see that it is a
QGraphicsObject, mulitply-derived from from both QObject and QGraphicsItem. I
stumbled onto virtual QObject::childEvent(QChildEvent*) which looked ideal
(since QChildEvent has child add/remove info), but it's not called in either of
the cases above.
Then, digging into the Qt docs, I see that QGraphicsObject users should *NOT*
look to QObject for parent/children relationships, but rather, should look only
to QGraphicsItem. Seems reasonable. Unfortunately, I could not find anything
in QGraphicsItem that looked like a slot or virtual function I could override
to receive add/remove child notification events (I need both).
I'm sure this is a simple answer -- what notification does QML trigger that I
can catch on the C++ side for (re-)parenting?
Thanks!
--charley
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Re: [Qt-qml] ListView's childrenRect
This will not work, or worse, has undefined behavior. ListView does not
instantiate all of its elements - only those that are needed to fill the
visible area of the view. If you define the view's height to be the height of
its children, but the number of children needed depends upon the height of the
view, you're unlikely to get what you want. Why does it seem to work for
XmlListModel? Beats me.
I'd suggest doing something like:
ListView {
height: count * 50
}
If you don't want to scroll and you don't need e.g. the currentIndex
functionality of the ListView then I'd suggest using a Column with a Repeater.
This is more efficient than a ListView and automatically sizes to its content
size.
Martin.
-Original Message-
From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On
Behalf Of Pasion Jerome (Nokia-MS-Qt/Oslo)
Sent: Wednesday, 17 November 2010 8:13 AM
To: qt-qml@trolltech.com
Subject: [Qt-qml] ListView's childrenRect
Hello all,
Someone sent me his problem with ListView's childrenRect. Essentially, binding
the ListView's height to the childrenRect.height when using a regular
ListModel
(with strings) will only show the first element while using the XmlListModel
will fit all
the model's items.
Here is his code snippet:
ListView {
id: list
interactive: false
//height: contentHeight //If bound to contentHeight warning is given
that there
is a binding loop!
height: childrenRect.height //If bound to childrenRect.height then
only one
item is shown (unless you use an XMLListModel!)
//contentHeight: childrenRect.height //Not really necessary
width: parent.width
model: listModel
//model: xmlListModel //If the XMLListModel is used, then the
childrenrect
binding is fine
delegate: listItem
}
}
What would be the best way of fitting the contents of any/all types of models?
Cheers,
Jerome P.
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Re: [Qt-qml] ListView header and footer behavior
Definitely a bug. Please report at http://bugreports.qt.nokia.com
Martin.
-Original Message-
From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On
Behalf Of ext Johannes P
Sent: Thursday, 11 November 2010 11:18 PM
To: qt-qml@trolltech.com
Subject: [Qt-qml] ListView header and footer behavior
Hi,
I'm trying to build a listView with header and footer. When I enable
SnapToItem, the header is not shown anymore. It is there, but because the list
snaps to the first Item below the header, one can only flick downwards to see
the header. This is probably not the correct behavior, since a non-visible
header doesnt make much sense. When snapping is turned off, it works as
expected. Also, the behavior is correct with the footer. It snaps correctly,
regardless of SnapToItem.
The following example reproduces the behavior.
Thanks for any ideas or comments,
Johannes
//## Start Example ###
import Qt 4.7
// In the following example, the header is not shown, i.e. is not in the view.
// The view doesnt snap to the header. If snapping is switched of it works.
Rectangle {
width: 200
height: 200
ListView {
clip: true; spacing: 1
width: parent.width
height: parent.height
// It works without Snapping
snapMode: ListView.SnapToItem
model: listModel
delegate: listDelegate
footer: footerAndHeader
header: footerAndHeader
}
ListModel {
id: listModel
ListElement {name: Dogs}
ListElement {name: Cats}
ListElement {name: Birds}
ListElement {name: Snails}
ListElement {name: Horses}
ListElement {name: Bugs?}
}
Component {
id: listDelegate
Rectangle {
width: parent.width
height: 60
gradient: Gradient {
GradientStop {
position: 0.00;
color: #f9f9f9;
}
GradientStop {
position: 1.00;
color: #c4c4c4;
}
}
Text {
anchors.centerIn: parent
text: name
}
}
}
Component {
id: footerAndHeader
Rectangle {
width: parent.width
height: 40
gradient: Gradient {
GradientStop {
position: 0.00;
color: #6d6d6d;
}
GradientStop {
position: 1.00;
color: #22;
}
}
}
}
}
//## End Example##
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Re: [Qt-qml] MapPolyline
Hi Sampo, This sounds like a bug to me, so I suggest logging a bug on http://bugreports.qt.nokia.com You may get more help on the qt-mobility-feedb...@trolltech.com mailing list. Martin. -Original Message- From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On Behalf Of ext Sampo Juhani Savola Sent: Wednesday, 10 November 2010 11:33 PM To: qt-qml@trolltech.com Subject: [Qt-qml] MapPolyline Hello I would like to draw a route on the Map with QML by using MapPolyline in Qt Mobility 1.1. Should this MapPolyline work with this release? I can use the Map object fine but when i try to add MapPolyline the code stops working and i get error: MapPolyline is not a type Thanx Sampo ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] Change property of dynamically created component
There's nothing wrong with this in concept. Could you provide a small self-contained example of what you've tried? Martin. -Original Message- From: qt-qml-boun...@trolltech.com [mailto:qt-qml-boun...@trolltech.com] On Behalf Of Ji Shiping (Nokia-MS/Espoo) Sent: Tuesday, 9 November 2010 4:15 AM To: qt-qml@trolltech.com Subject: [Qt-qml] Change property of dynamically created component Hi, We have a QML with two states and one loader component. In state2, a new component yellowRectComponent is created by the loader. In state3, we'd like to modify this newly created component's properties, but it doesn't seem to work (the new component creation is successful though). Do you know whether this is supported scenario or there is alternative way of achieving this? Thanks. BR, Shiping ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
Re: [Qt-qml] emit data on a QAbstracListModel does not update the QML ListView.
It may be a combination of this change and others. There have been a number of
changes to this code since the rc was released.
If you still see QTBUG-13628 I'd suggest getting the qt 4.7 branch from
gitorious. If you have problems after that let me know and I'll reopen it.
Martin.
From: ext Bartosh Wroblevksy [bart...@live.com]
Sent: Saturday, 18 September 2010 3:57 PM
To: Jones Martin (Nokia-MS-Qt/Brisbane); qt-qml@trolltech.com
Cc: Stephen Kelly
Subject: RE: [Qt-qml] emit data on a QAbstracListModel does not update the QML
ListView.
Hi Guys,
I applied the patch to Qt 4.7.0 RC1 here on my computer and it does fix
http://bugreports.qt.nokia.com/browse/QTBUG-13664 but it does not seem to fix
the other bug that was closed namely
http://bugreports.qt.nokia.com/browse/QTBUG-13628. I'll check again to make
sure.
Thanks,
Bartosh
From: martin.jo...@nokia.com
To: qt-qml@trolltech.com
Date: Thu, 16 Sep 2010 11:21:20 +1000
CC: steve...@gmail.com
Subject: Re: [Qt-qml] emit data on a QAbstracListModel does not update the
QML ListView.
On Wed, 15 Sep 2010 04:32:37 am ext Stephen Kelly wrote:
Bartosh Wroblevksy wrote:
Hello Steve,
Thank you for filing the BR. I have a few questions.
1) What's the number of the bug?
http://bugreports.qt.nokia.com/browse/QTBUG-13628
This turned out to be another manifestation of the dataChanged() bug also:
http://bugreports.qt.nokia.com/browse/QTBUG-13664
Martin.
2) I have trouble seeing how in this case, moving rows and changing data
is not equivalent. In fact,unless my morning coffee was not caffeinated.
If I write
m_elements[1] =x; emit dataChanged(index(1,0), index(1,0));
Should I not expect to see the QML listview change?
Yes, you are right. Indeed that is another bug. What you are doing
WorksFromMe, but I don't have a plugin for the model like you do, but I
create the QDeclarativeMainView in an application and use
setContextProperty(myModel). Maybe if loaded through a plugin qml doesn't
handle that signal somehow?
It's worth another bug report.
3) beginResetModel() and endResetModel() is clearly not what I want. My
application flickers horribly. In fact I hadinitially tried an emit
modelReset() which also made my application flick horribly. I was hoping
to avoid the flickerwith an emit dataChanged. Until this bug gets fixed,
is there any better alternative?
I don't think so, sorry.
4) You mention *plus* updating
persistent indexes in between.Sorry, can you elaborate on this?
doMove()
{
layoutAboutToBeChanged();
// do the move
m_items.move(0, 1);
QModelIndexList pers = persistentIndexList();
foreach(const QModelIndex idx, pers) {
if ( idx.row() == 0 ) {
const QModelIndex newIdx = createIndex(1, 0);
changePersistentIndex(idx, newIdx);
}
if ( idx.row() == 1 ) {
const QModelIndex newIdx = createIndex(0, 0);
changePersistentIndex(idx, newIdx);
}
}
layoutChanged();
}
I hardcoded the 0 and 1 for clarity, but you can imagine that if you're
moving an arbitrary range of items an arbitrary distance the implementation
gets difficult. Avoid doing it yourself where possible and use
beginMoveRows etc instead.
If you want to see an implementation implementing a move in a tree using
just the layout change stuff see
ModelMoveLayoutChangeCommand::emitPreSignal and
ModelMoveLayoutChangeCommand::emitPostSignal here:
http://websvn.kde.org/trunk/KDE/kdelibs/kdeui/tests/proxymodeltestsuite/dyn
amictreemodel.cpp?view=markup
Compare to ModelMoveCommand::emitPreSignal and
ModelMoveCommand::emitPostSignal
Updating those is needed for selections, tree expansion proxy models etc to
work properly and not crash.
5) You
wrote
+ beginMoveRows(QModelIndex(), 0, 0, QModelIndex(), 2);
m_elements.move(0,1); + endMoveRows();
Since the destination child is 1, I would have expected to write
+ beginMoveRows(QModelIndex(), 0, 0, QModelIndex(), 1);
m_elements.move(0,1); + endMoveRows();
but then again, my coffee may be decaffeinated.
It's common for people to think that. I improved the docs with diagrams for
4.7:
http://doc.trolltech.com/main-snapshot/qabstractitemmodel.html#beginMoveRow
s
It's consistent with other model api where you identify the 'gap' you want
to move the item to. Item at position 0 can't be moved to gap 0 or 1
because it is already in between them. It can be moved to position 2
though. Unfortunately the QList::move API is not the same. It's also
easier to implement dropMimeData like this.
All the best,
Steve.
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Re: [Qt-qml] Avoid binding warnings on object creation
I'm planning to push it to 4.7 on Monday.
Martin.
From: qt-qml-boun...@trolltech.com [qt-qml-boun...@trolltech.com] On Behalf Of
Cunha Leo (Nokia-MS-Qt/Oslo)
Sent: Friday, 3 September 2010 8:13 PM
To: qt-qml@trolltech.com
Subject: Re: [Qt-qml] Avoid binding warnings on object creation
Any plans for when this fix will reach Qt? Any chance for 4.7.1?
In qt-components, we currently have 3 of those warnings and we are doing
workarounds to avoid getting more of them :-(
br,
// leo
-Original Message-
From: Jones Martin (Nokia-MS-Qt/Brisbane)
[mailto:martin.jo...@nokia.com]
Sent: Friday, September 03, 2010 12:14 AM
To: ext Adriano Rezende; Cunha Leo (Nokia-MS-Qt/Oslo)
Cc: qt-qml@trolltech.com
Subject: RE: [Qt-qml] Avoid binding warnings on object creation
This is a bug. The attached patch fixes it.
BR,
Martin.
-Original Message-
From: qt-qml-boun...@trolltech.com [mailto:qt-qml-
boun...@trolltech.com] On Behalf Of ext Adriano Rezende
Sent: Friday, 3 September 2010 3:01 AM
To: Cunha Leo (Nokia-MS-Qt/Oslo)
Cc: qt-qml@trolltech.com
Subject: Re: [Qt-qml] Avoid binding warnings on object creation
I am using the Component::createObject(parent) and inside the
component I have bindings to its parent, like:
Item {
id: page
// FIXME: the line below creates warnings when the page component
is instantiated
width: parent.width
}
I get these warnings when instantiating the page: Unable to assign
undefined value
Is there any workaround for avoiding these binding's warnings when
instantiating a dynamic object?
I think this is the same problem I was facing.
I created a suggestion in JIRA related to this behavior:
http://bugreports.qt.nokia.com/browse/QTBUG-13170
The problem is that when creating an object dynamically, the parent is
set after all properties have been initialized. So, the parent itself
does not exist at the initialization time.
Br,
Adriano
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Re: [Qt-qml] Antialiasing
smooth: true Martin. From: qt-qml-boun...@trolltech.com [qt-qml-boun...@trolltech.com] On Behalf Of ext Shady Zayat [sh...@zoogylabs.com] Sent: Wednesday, 4 August 2010 7:23 PM To: qt-qml@trolltech.com Subject: [Qt-qml] Antialiasing Is there a was to enable antialiasing. Text is barely readable when rotated. This is on Mac and Linux, I haven't tried Windows yet. -- Shady Zayat ___ Qt-qml mailing list Qt-qml@trolltech.com http://lists.trolltech.com/mailman/listinfo/qt-qml
