[Interest] QAbstractVideoSurface::present - videoframe start/endtime always -1 on windows

Hi, I've created a custom video player using QMultimedia, that plays back certain video files that are to be post-processed frame-by-frame. The post-process depends on each video frame's start time. I'm using the Qt 5.1 beta release (I use the new desktop QML features). I've created a video

Re: [Interest] Quick2 - animate sorting of listview, sorted with QSortFilerProxyModel

Hi again, thanks for all the replies! Nils, thanks for pointing out the beginMoveRows functions and the sample code. So the limitation isn't ListView at all, it's just the QSortFilterProxyModel. I can confirm that using this method the animations do work, as I've now implemented my own sorting

[Interest] Quick Controls Menu questions

Hi, I'm planning a Quick2-based application that will run on an embedded Linux device (similar to Raspberry PI) where the application is the only user of the framebuffer (no X11). The application will be controlled by keyboard cursor keys only. I have been doing some mockups on the desktop

Re: [Interest] Quick Controls Menu questions

-08-23 16:10, skrev deDietrich Gabriel: Hi, On Aug 23, 2013, at 9:49 AM, Ola Røer Thorsen o...@silentwings.no wrote: - Is it possible to do complete styling of the Menu? There is some things in the source code it seems, but it's not documented. Maybe more features are planned in Qt 5.2? We

[Interest] Generate key press events in c++ for a Quick2-application?

I need to generate key press events in c++ (based on packets received via udp), so that these behave like regular key presses in a Quick2-based application. The target platform has a rather specialized non-standard keyboard. I have found some examples on how to do this with widgets, but these

Re: [Interest] Generate key press events in c++ for a Quick2-application?

Brilliant, it works, thanks :-) Den 2013-08-30 14:24, skrev Tomasz Olszak: 2013/8/30 Ola Røer Thorsen o...@silentwings.no mailto:o...@silentwings.no I need to generate key press events in c++ (based on packets received via udp), so that these behave like regular key presses

[Interest] Keyboard navigation in QtQuick.Controls ScrollView?

Hi, I can't seem to get keyboard navigation working when I embed a ListView in a ScrollView ScrollView { ListView { ... } } just like in the documentation. I've tried enabling focus on both, or just one, and so on. Keyboard navigation works fine on the ListView when used without the

Re: [Interest] Keyboard navigation in QtQuick.Controls ScrollView?

Hi Jens, thanks for the explanation! Setting interactive to true solved for me (the target platform has no mouse or touch anyway). Best regards, Ola 2013/9/25 Bache-Wiig Jens jens.bache-w...@digia.com On Sep 24, 2013, at 9:53 AM, Ola Røer Thorsen o...@silentwings.no wrote: Hi, I

[Interest] Custom Quick view to visualize a List-model of points on a map

Hi, I have a c++ list model that inherits QAbstractListModel. It contains a list of waypoints that amongst other things have x,y screen coordinates. Points are added, removed and values are changed runtime. I want to visualize these in Quick2 on top of a map image. I need to create Quick Items

Re: [Interest] Custom Quick view to visualize a List-model of points on a map

Ah! Thank you, exactly what I was looking for! Best regards, Ola (Sendt fra mobiltelefon) Den 28. sep. 2013 kl. 16:47 skrev Дмитрий Козлов gni...@mail.ru: 27.09.2013 17:22, Ola Røer Thorsen пишет: Hi, I have a c++ list model that inherits QAbstractListModel. It contains a list

[Interest] Fwd: QT Quick Controls - Menu

I agree that the documentation is slightly misleading. There is private API to position the menu at any position, but for the moment it’s still… private. We may make it public in a way or another if we see demand for that. BTW, what is your exact use case? There is definitely a need for

[Interest] use custom fragment shader for Quick2 Image item

Hi all, I want to use a custom fragment shader when rendering a Image item. Is it possible to set the shader to use directly somehow? That is, I want to use a custom shader instead of the passthrough fragment shader used in the Image element. I have tried using the QtGraphicalEffects

Re: [Interest] use custom fragment shader for Quick2 Image item

cases such a feature would indeed be useful to avoid having to do this. Cheers, Sean On 22/10/2013 14:20, Ola Røer Thorsen wrote: Hi all, I want to use a custom fragment shader when rendering a Image item. Is it possible to set the shader to use directly somehow? That is, I want

[Interest] Quick2 ShaderEffect: source or provider missing when binding textures

Hi all, if I use a ShaderEffect on an image that is loaded asynchronously, I get the error/debug message on the console: ShaderEffect: source or provider missing when binding textures for every frame rendered until the image is completely loaded and the texture is complete. This means our

Re: [Interest] Quick2 ShaderEffect: source or provider missing when binding textures

... } Should keep it hidden and also remove the warning... cheers, Gunnar -- *Fra:* interest-bounces+gunnar.sletta=digia@qt-project.org[interest-bounces+gunnar.sletta= digia@qt-project.org] på vegne av Ola Røer Thorsen [o...@silentwings.no ] *Sendt:* 7

Re: [Interest] Tearing in Quick2 flickable-based items with clipping enabled

[interest-bounces+gunnar.sletta= digia@qt-project.org] på vegne av Ola Røer Thorsen [o...@silentwings.no ] *Sendt:* 13. november 2013 15:29 *To:* interest@qt-project.org *Emne:* [Interest] Tearing in Quick2 flickable-based items with clipping enabled Hi all, I'm seeing tearing-effects

Re: [Interest] Tearing in Quick2 flickable-based items with clipping enabled

30Hz instead of a 30-60 mix with the occasional tearing. Cheers, Ola 2013/11/13 Ola Røer Thorsen o...@silentwings.no Hi Gunnar, I'll see if I can create a small example that reproduces it. Cheers, Ola 2013/11/13 Sletta Gunnar gunnar.sle...@digia.com If this consistently

Re: [Interest] C++ enums undefined in QML

Did you remember to import your registered type in your qml code? If you register something like this, qmlRegisterTypeMyClass(MyClass,1,0,MyClass); where you have your enums then in qml you need to import that type on the top of your code, import MyClass 1.0 Cheers, Ola 2013/11/14 Guido

[Interest] Keyboard navigation issues in Quick2

Hi all, here is a case that I find rather limiting and time-consuming. It has to do with focus scopes and keyboard navigation. I'm looking for a best way to deal with the following situation: - I have a ColumnLayout of button-like items, like a popup-menu. - The first item has focus set to true.

Re: [Interest] Tearing in Quick2 flickable-based items with clipping enabled

on DM3730/BB-xM. - VStevenP On Wed, 11/20/13, Sletta Gunnar gunnar.sle...@digia.com wrote: Subject: SV: [Interest] Tearing in Quick2 flickable-based items with clipping enabled To: vstevenpa...@yahoo.com vstevenpa...@yahoo.com, Ola Røer Thorsen o

Re: [Interest] Keyboard navigation issues in Quick2

Hi Liang, thanks for the reply! I will create a bug report right away. Best regards, Ola 2013/11/22 Liang Qi cavendish...@gmail.com Hi, Ola, Just got notification about your question from others, and subscribed this mailing list.

Re: [Interest] Keyboard navigation issues in Quick2

And here it is: https://bugreports.qt-project.org/browse/QTBUG-35051 2013/11/22 Ola Røer Thorsen o...@silentwings.no Hi Liang, thanks for the reply! I will create a bug report right away. Best regards, Ola 2013/11/22 Liang Qi cavendish...@gmail.com Hi, Ola, Just got notification

[Interest] Not possible to connect QTcpSocket::error signal the Qt5-way?

Hi all, I've started using the new Qt5 way of connecting signals and slots, to get errors compile-time instead of runtime. Great stuff. Here is one I struggle to connect. If you have a QTcpSocket, and want to handle the error signal in a slot called tcpSocketError, a connect like this:

Re: [Interest] Not possible to connect QTcpSocket::error signal the Qt5-way?

, http://qt-project.org/doc/qt-5.1/qtcore/signalsandslots.html ? Cheers, Ola 2013/11/22 Thiago Macieira thiago.macie...@intel.com On sexta-feira, 22 de novembro de 2013 16:56:47, Ola Røer Thorsen wrote: Is this a bug in Qt, or did I not use the correct syntax? I recon this has to do

[Interest] Quick2 ListView - set current index to a new item when added

Hi all, I have a ListView showing a c++ model that changes runtime. Items are added and deleted. When an item is added, how do I set the ListView's current index to the new item? Cheers, Ola ___ Interest mailing list Interest@qt-project.org

[Interest] QuickControls Action shortcut property - more detailed description somewhere?

Hi all, the shortcut property on QuickControls Action uses a string. The documentation on this one is very short: Shortcut bound to the action. Defaults to the empty string. Is there a list somewhere describing the string names of all keys and how to write these as combinations of ctrl, shift,

Re: [Interest] Quick2 ListView - set current index to a new item when added

2013/12/9 Preet prismatic.proj...@gmail.com Have you tried connecting to the onAdd() signal and then calling positionViewAtIndex? http://doc-snapshot.qt-project.org/qdoc/qml-qtquick-listview.html#positionViewAtIndex-method I was a bit confused about that one, it has to be done like this,

Re: [Interest] Quick2 ListView - set current index to a new item when added

2013/12/9 Preet prismatic.proj...@gmail.com Have you tried connecting to the onAdd() signal and then calling positionViewAtIndex? http://doc-snapshot.qt-project.org/qdoc/qml-qtquick-listview.html#positionViewAtIndex-method I was a bit confused about that one, it has to be done like

Re: [Interest] Quick2 ListView - set current index to a new item when added

2013/12/11 Preet prismatic.proj...@gmail.com The index is exposed just as 'index' in the delegate itself. Ah. Thank you! Somehow missed that earlier. What's the difference between that one and Component.onCompleted? I think Component.onCompleted is run any time something creates the

[Interest] QOpenGLFramebufferObject, render to FBO using texture from another Image item?

I recently discovered the new way of doing render-to-FBO in Qt 5.2.0. It's a major improvement compared with what had to be done previously, I think! :-) However I have run into something tricky as I want to do something more advanced: I need to render some textured geometry into an FBO. The

Re: [Interest] QOpenGLFramebufferObject, render to FBO using texture from another Image item?

*Fra:* interest-bounces+gunnar.sletta=digia@qt-project.org [interest-bounces+gunnar.sletta=digia@qt-project.org] på vegne av Ola Røer Thorsen [o...@silentwings.no] *Sendt:* 12. desember 2013 15:34 *To:* interest@qt-project.org *Emne:* [Interest] QOpenGLFramebufferObject, render

[Interest] Set custom fragment shader on a QQuickFramebufferObject-based item?

Is it possible to set a custom fragment shader (for rendering on screen) on an item that is inheriting QQuickFramebufferObject? If so, how? Cheers, Ola ___ Interest mailing list Interest@qt-project.org

[Interest] Best practice for properties, QAbstractListModel with a QListQObject* and a Quick2 view

Hi, I have a list of objects at the core of a class inheriting QAbstractListModel, QListMyObject* m_list; MyObject inherits QObject and has many properties (20 or so). I need to access most of these properties in a Quick2 view delegate. To avoid creating roles for each of these properties, I

Re: [Interest] Best practice for properties, QAbstractListModel with a QListQObject* and a Quick2 view

Hi Jan! When working with the QAbstractItemModel, items can only be deleted via resetting the model, or when removing rows/columns. The row/column removal shall happen in three phases: 1) call beginRemoveRows 2) remove the internal representation, freeing the MyObject instances 3) call

Re: [Interest] Having an issue with a font

2013/12/20 Rogers Nate nate.rog...@raymondcorp.com I am having an issue where sometimes certain letters of one of the fonts I am using are getting corrupted. It is not always the same letter, each time I do a build it changes, one time it may be a W then next time it’s a c or an h,

Re: [Interest] QtQuick real-time meter widget question (QML Loader-related)

2014/1/3 VStevenP vstevenpa...@yahoo.com 1. Is there a way to run this meter so that it will not be blocked by any QML Loader activity? (I have some launcher icons on a sidebar which control what QML is loaded to appear in the common desktop client area of my display.) My hope is that the

[Interest] Question about reading glsl shader source from a QResource using compression

Hi all, I've been looking at the Scene Graph - Graph example application included with Qt5.2.0, to see how to create a custom shader material for Qt Quick. In linenode.cpp, there is a LineShader class, where the shaders are read like so: const char *vertexShader() const { QResource

Re: [Interest] Question about reading glsl shader source from a QResource using compression

I think the example is just doing it wrong, it should instead load the resource file contents using QFile into two QByteArrays into the ctor and then return the QByteArrays' contents there. Right. Thanks for the feedback! I'll use QFile to be sure, in case compression is enabled. Cheers!

[Interest] Caching of compiled/initialized qml code to disk possible?

Hi all, I have an application written with Qt 5.2 in C++ and QtQuick2, running on a low-end ARM device. I use the Loader item to select between various screens in the application (I've currently got 6 screens or so). This way I can limit the amount of active bindings at a given time, etc. The

Re: [Interest] QML and video

Not directly answering your question Jeff, but anyway, I recommend looking into using bc-cat on the SGX if possible. http://processors.wiki.ti.com/index.php/OpenGLES_Texture_Streaming_-_bc-cat_User_Guide You will have to write your own video render item for Qt Quick, because you need a special

[Interest] Qt Quick Scene Graph, texture questions, Qt 5.2.0

Hi, I've got 3 questions about texture use in the Qt Quick scene graph: 1. In general it's recommended in OpenGL to use power-of-two-sized textures whenever possible, for performance resons. Does the Qt Quick scenegraph deal with this in any way, or is it up to the user to use properly sized

[Interest] PVRTC textures in Qt Quick 2?

Is it possible to use PVRTC texture compression in Qt Quick 2 on PowerVR gpus? If not, what would it take to add such a feature? I searched through the Qt 5.2.0 source code, seems there was PVRTC support in the old QGL* classes, but nothing in the QOpenGL* classes. Cheers, Ola

Re: [Interest] PVRTC textures in Qt Quick 2?

2014/1/20 Gunnar Sletta gunnar.sle...@jolla.com You can install a custom image provider that provides the PowerVR texture directly as a QSGTexture. In the scenegraph playground repository there is already a plugin that does this for AMD compressed textures. You can use that as a basis for

Re: [Interest] Qt Quick Scene Graph, texture questions, Qt 5.2.0

Thanks Gunnar :-) ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest

[Interest] How do properly deal with items being disabled in a focus scope in Quick2 (5.2.0)?

I've got a custom menu item (ColumnLayout-based), where the items inside are some custom button items. Each item is set up with KeyNavigation so that active focus is moved up and down using the cursor keys. If a button item's enabled property is set to false while having active focus, it's not

Re: [Interest] How do properly deal with items being disabled in a focus scope in Quick2 (5.2.0)?

Onsdag 22. januar 2014 13.46.03 skrev Ola Røer Thorsen: I've got a custom menu item (ColumnLayout-based), where the items inside are some custom button items. Each item is set up with KeyNavigation so that active focus is moved up and down using the cursor keys. If a button item's enabled

[Interest] 64bit integer type in QML?

Hi all, is it possible to use 64bit integers in QML? Looking at the docs at http://doc.qt.io/qt-5/qml-int.html it seems like the integers are 32-bit signed only (by counting the zeros in 20...) Thanks, Ola ___ Interest mailing list

[Interest] Custom QtQuick Animator API?

Hi all, I would like to create a custom Animator class, or something similar that can manipulate a QQuickItem's x and y position from the render thread. The intended use is to move some label items on top of a 3d scene. The labels will follow certain entities in the 3d scene. I know it will

Re: [Interest] Qt Quick UI Forms item views: best practices

Den 2015-01-21 09:24, skrev Alexander Ivash: Yes, your are right, there was an error in my sample, but even fixing it doesn't change a lot: ui.qml files becomes not editable via QtCreator's QML designer due to presence onClicked: root.onClicked(root.model.get(index)); /// this line makes

Re: [Interest] QtQuick - How to move focus away from disabled Item?

this help somehow, Jerome On Wed, Jan 28, 2015 at 9:46 AM, Ola Røer Thorsen o...@silentwings.no wrote: Hi, I'm having some trouble making a robust QtQuick 5.4-based application where I only have 4 cursor keys and a return key available as the input method for the user. I have various gui

[Interest] QtQuick - How to move focus away from disabled Item?

Hi, I'm having some trouble making a robust QtQuick 5.4-based application where I only have 4 cursor keys and a return key available as the input method for the user. I have various gui buttons that I can move focus between. I've set this up using the KeyNavigation.onXXX etc. For a simple static

Re: [Interest] Custom QtQuick Animator API?

Hi Gunnar, thanks for the reply. 2015-01-25 16:42 GMT+01:00 Gunnar Sletta gun...@sletta.org: No such plan, no :) Doing custom animations on your nodes is easy using the QSGNode API though. For instance, like it is done in the “threadedanimation” example:

Re: [Interest] Pre-compile system

2015-02-24 8:51 GMT+01:00 Mathieu Slabbinck matty.slabbi...@gmail.com: So my question here: how can I make a qt project that compiles libx before starting on the app itself, disregarding multiple jobs. Hi, I think doing something like this in your subdir project file will help: TEMPLATE =

[Interest] Use of enum class, Q_ENUM and QML

Hi, I'm looking into using enum classes (c++11) and exposing them to QML as a part of planning a new project. It will use Qt 5.5 so I'm using Qt 5.5 alpha for now. I'd like to use enum classes for the enums, but I'm not sure if it is possible to use these in QML. Let's say I have two enums in a

[Interest] Qt3D 2 and Bullet physics

Hi all, just wondering if someone has tried using the Bullet physics engine with Qt3D 2.0? Wondering about the best/recommended way to combine these. I'd like to step Bullet's simulation loop and visualize the rigid bodies, basically. Best regards, Ola

[Interest] How to set absolute Qt3D::QCamera rotation/orientation

I need to set a Qt3D::QCamera orientation directly. I've got the position in a QVector3D and the rotation in a QQuaternion. I can't seem to find any API for this. The "rotate"-function just adds my quaternion to the existing orientation which is not what I'm looking for. Is there some better way

Re: [Interest] armv7a-hard-float in Qt android apps

2016-04-29 10:11 GMT+02:00 Nuno Santos : > > Code compiled and ruined fine but couldn’t notice a faster performance (I > have profiling timers in critical parts of the application). > > Has anyone done this before? > > As far as I know Qt is built with qreal as double as

Re: [Interest] armv7a-hard-float in Qt android apps

2016-04-29 16:36 GMT+02:00 Jean-Michaël Celerier < jeanmichael.celer...@gmail.com>: > > On Fri, Apr 29, 2016 at 1:55 PM, Ola Røer Thorsen <o...@silentwings.no> > wrote: > >> >> float a = 1.0f; >> float b = 2.0*a; // BAD! >> float b = 2.0f*a; // G

Re: [Interest] armv7a-hard-float in Qt android apps

2016-04-30 10:46 GMT+02:00 Jean-Michaël Celerier < jeanmichael.celer...@gmail.com>: > https://godbolt.org/g/DqBlFG > > With gcc -O1 > > float f(float x) > { > return 2. * x; > } > > becomes > > f(float): > addss %xmm0, %xmm0 > ret > > > and > > float g (float x) > { > return

Re: [Interest] [Qt3D] Render to video

2016-04-18 14:38 GMT+02:00 Andy : > On Mon, Apr 18, 2016 at 3:26 AM, Harald Vistnes > wrote: > >> Hi Andy, >> >> An alternative is to use the FFMPEG encoding library instead of the >> command line tools. Then you can pass each frame to the video

[Interest] Managing memory with QObject*-models exposed to QML

I've found that creating C++ models containing a list of QObject* based on QAbstractListModels and using them in Quick views such as ListView is very useful. I'm not the only one, there are several implementations of "QObjectListModel" around, and I've got my own as well. On quite rare ocations I

Re: [Interest] Qt Location with Mapbox plugin?

2016-07-15 18:08 GMT+02:00 : > > Do you see http://doc.qt.io/qt-5/location-plugin-mapbox.html and > https://www.mapbox.com/help/define-map-id/ ? > > Thank you! That second URL helped, I had not seen it. I was using the Mapbox Studio, and that page says "Styles made in

[Interest] Qt Location with Mapbox plugin?

I'm struggling getting any maps shown using the Qt Location Mapbox plugin. I'm getting error messages like "failed to fetch tile, , server replied: Forbidden". The plugin needs a map_id and an access_token. On the mapbox website it's easy to find the access tokens, but no map id's. Maybe

Re: [Interest] Qt Location with Mapbox plugin?

tion. I am actually trying to use mapbox, not osm/mapquest that is now broken. > 2016-07-15 14:43 GMT+02:00 Ola Røer Thorsen <o...@silentwings.no>: >> I'm struggling getting any maps shown using the Qt Location Mapbox plugin. >> I'm getting error messages like &qu

Re: [Interest] Managing memory with QObject*-models exposed to QML

Thank you for the feedback, Ben. 2016-07-15 19:32 GMT+02:00 Ben Lau : > Hi, > > In my humble opinion, QObjectListModel is a bad idea. Because it is > difficult to manage the life cycle of QObject with QML. Just like your > problem. I have met the similar issue in my first QML

[Interest] Qt3D camera field of view angle definition?

What's the definition of the field of view angle for Q3D' s QCamera? Is it the diagonal field of view? Cheers, Ola ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest

[Interest] Qt3D SceneLoader - adjusting materials when using Collada files exported from Blender

Hi, I need to load some simple 3d scenes into an application using Qt3D, QtQuick and Qt 5.7. I've created the scenes in Blender, exported them as Collada files and they mostly show up in my application unless SceneLoader causes a crash. I'm using the basic ForwardRenderer frameGraph like so,

[Interest] Qt Data Visualization - Scatter3D gradient from independent value

I'm plotting 3d point cloud data in QML using the Scatter3D item. I'd like to set the color of each point individually from a gradient, but not related to each point's position. The use case is plotting temperatures in 3d-space. Each point represents a temperature measurement at some 3d

[Interest] Open source license attribution when deploying a Qt-based application

I plan to release a closed source Qt-based application in a few months. It's using the LGPL version of Qt, and I plan to bundle the Qt dynamic libraries and plugins I need along with the application in an installer. I have built up a list of the open source libraries that I have used along with

[Interest] Setting propery values on Q_GADGET-based objects in qml possible?

Hi all, I have a Q_GADGET-based class with properties that I instantiate in C++ and expose to qml via QVariant in a list model. The class is registered to Qt and Qml using Q_DECLARE_METATYPE, qRegisterMetaType and qmlRegisterUncreatableType. The properties are defined like this: class MyGadget

Re: [Interest] Setting propery values on Q_GADGET-based objects in qml possible?

2017-06-20 13:52 GMT+02:00 Ola Røer Thorsen <o...@silentwings.no>: > function doStuff() { >var o = theGadget; >console.log("o.name"); // prints "Name" >o.name = "Some other name"; // No error, but nothing really happens > eithe

[Interest] How to get in touch with the Qt Company sales people?

to go unnoticed. If anyone on this list from the Qt Company can give me some valid contact information please send me an email. Best regards, Ola Røer Thorsen o...@silentwings.no ___ Interest mailing list Interest@qt-project.org http://lists.qt

[Interest] Set transparent fill on map using mapboxgl plugin

Hi, I'm evaluating using QtLocation's map using mapboxgl. Currently I'm using the default settings, default map style, default developer access token. I'd like to set most layers' fill color to transparent, to see how it works out as an overlay on top of some live video. >From the documentation

Re: [Interest] Set transparent fill on map using mapboxgl plugin

2017-10-24 12:36 GMT+02:00 Paolo Angelelli : > > For your specific problem, if this is going to work, it's probably by > setting some of the properties described > in https://www.mapbox.com/mapbox-gl-js/style-spec/#layers-fill > > Thanks for the reply! I got it working,

Re: [Interest] Set transparent fill on map using mapboxgl plugin

> > MapParameter { > type: "paint" > property var layer: "water-shadow" > property var fillOpacity: 0.1 > } > > ... sorry for accidentally pressing send. It seems like the map does not handle transparency properly. I also tried

[Interest] Webgl (streaming) platform plugin in Qt 5.10 missing?

Is the new webgl streaming platform plugin supposed to be included in the Qt 5.10 Linux installer, or do I have to build Qt from source to use this? The platform plugin is as far as I can see not included in the current beta2 (installed using the online installer). Ola

Re: [Interest] How to make a looping element?

Try the RotationAnimation item and set the direction property to shortest. http://doc.qt.io/qt-5/qml-qtquick-rotationanimation.html Cheers, Ola > Den 29. jan. 2018 kl. 02.15 skrev Jason H : > > I am trying to make a compass control, something that shows 0-360, like a > boat

Re: [Interest] Two from one.

2018-02-08 13:56 GMT+01:00 william.croc...@analog.com < william.croc...@analog.com>: > I have an application. > I would like to rearchitect it were 90% is in a shared library. > I would use that lib to link a main application. > I would like to create a single .pro file that can be > used to

Re: [Interest] Qt Quick and animatic 12MP image

2018-09-05 14:08 GMT+02:00 Tomasz Olszak : > Hi, I want to animate (change flickable contentX and contentY) image > position in screen. Image is bigger(4000x3000) than screen. Currently, I > implemented it on I7 ivybridge on Kubuntu 18.04. > It simply stutters few times a second. If anyone has

Re: [Interest] qtLocation and mbtiles

> I need to create a plugin for qtLocation that would use a local mbtile sql > database instead of an online provider or a directory. The mbtiles management > part is not an issue, I have already a class responding to tiles queries that > I use in another widget-based application. > > So far

Re: [Interest] qtLocation and mbtiles

> > > Thanks Ola for your reply and advise. I gave it a try and it is working > nicely (the server is in a thread of the main application as you > suggested). I used the osm plugin instead of mapbox-gl, is there any reason > why mapbox-gl would be more advantageous? > > I'm using a mix of vector

[Interest] QTimer at 30Hz interval?

is there some nice trick to make a QTimer trigger at 30 Hz? This interval can't be expressed properly in milliseconds (1000/30 = 33.33...) My use case is for Linux only so I'd be happy with some Linux-specific way of triggering a signal at 30 Hz too. It won't have to be very precise for each

[Interest] Efficiently render QtQuick-scene and encode to H264 on i.MX6 VPU?

Hi, I need to render a Qt Quick scene and stream it as H264 data on an i.MX6-device running Linux. The use case is to be used live with as little latency as possible. I'm thinking of using the QQuickRenderControl class. The easy way is probably to render the scene to a QOpenGLFramebufferObject,

Re: [Interest] Efficiently render QtQuick-scene and encode to H264 on i.MX6 VPU?

Hi Gunnnar, thanks a lot, this gives me a good starting point. I didn't know I could use GL_viv_direct_texture "in reverse" like this, I'll try it out. Already using it to stream decoded h264 video to a texture for rendering to the screen. I don't know which one will work best, but you want to

Re: [Interest] Efficiently render QtQuick-scene and encode to H264 on i.MX6 VPU?

he environment variable QT_QPA_EGLFS_FB to my virtual device. I'd like to avoid this if possible. Cheers, Ola 2018-03-23 9:12 GMT+01:00 Ola Røer Thorsen <o...@silentwings.no>: > Hi Gunnnar, > > thanks a lot, this gives me a good starting point. I didn't know I could > use GL_viv_direct

Re: [Interest] Screen Capture as format YUV

There is some code in the QMultimedia source that does convert from YUV to RGB while rendering to the screen, I'd recommend you take a look there for inspiration. I think it's the qsgvideonode_yuv.cpp file. I've done similar things (I do rgb->yuv instead). Basically you upload your YUV image to

Re: [Interest] Qt installer from console

Last time I tried the command line options to avoid using the installer gui did not do anything. Then spent some time trying to script the installer for console-only-use, but it's not well documented and hard to get right. Expect to get into situations during upgrades where your script will get

Re: [Interest] Operator QMap[] is casting to int?

lør. 4. mai 2019 kl. 17:51 skrev Thiago Macieira : > No, the size of something definitely fits in int on 32-bit systems. And > why do > you need to do any static_cast in the first place? > We build our code using gcc with the options "-Wall -Wextra -Werror" and this leads us to have to use

Re: [Interest] Operator QMap[] is casting to int?

> Could you make an example where the casts are needed? Maybe the code can > be rearranged in a way that the casts are NOT needed in the first place. > > QByteArray bytes; // chosen because some api needs it later std::vector other_bytes; // maybe returned from some 3rd party library ... if

Re: [Interest] Expected event execution order in this multi-thread application

man. 30. sep. 2019 kl. 16:48 skrev Thiago Macieira < thiago.macie...@intel.com>: > > It's just wrong to use it. Just like QThread::{,m,u}sleep. Don't use them. > > What's wrong with the sleep functions in particular? Are they worse than calling for example unistd.h's "usleep" or

[Interest] Proper way to handle QUdpSocket::writeDatagram when it returns TemporaryError

Hi all, I've got a thread in an application (Linux, Qt 5.13.0) which just writes udp datagrams at a relatively high frequency (video streaming). Sometimes the QUdpSocket::writeDatagram function returns -1 and the socket error is "TemporaryError". Looking into the source code of the udp socket

Re: [Interest] MapboxGL offline and custom vector tiles source

tor. 19. des. 2019 kl. 17:24 skrev maitai : > We would like to serve custom vector tiles, ideally though an API call > or eventually a local server/stream. We don't want to add data or layers > to an existing mapbox chart, but rather respond to tile queries by > sending our own geojson tiles. We

Re: [Interest] mapboxgl plugin and glyphs

> 27. des. 2019 kl. 19:51 skrev maitai : > > Hello, > > Is there a way to specify a specific url for glyphs in mapboxgl plugin? > Define a custom map style with those glyphs and serve it locally is the only way I can think of. Your server needs to serve the glyphs too along with the

[Interest] Future of Qt Location (mapping solutions) in Qt 6

Hi all, just wanted to bring some attention to the fact that it is still unclear if the Qt Location module (which gives plotting of geographical maps) will be included in Qt 6 at all. For our use-case it's a complete show-stopper if it disappears (especially using the mapbox-gl plugin) and we

[Interest] Quick3D in Qt 5.15: Texture file format with mipmaps and tool to create them on Linux?

Hi, as far as I can see Qt Quick3D in Qt 5.15 is not able to automatically generate mipmaps on textures (introduced in Qt 6.x as far as I can see). Anyone know which texture file formats are supported in Qt Quick3D in Qt 5.15, and any Linux-based tools to use to generate such files from a .png

[Interest] Qt Quick + Unreal Engine?

Hi all, just wondering if any of you have had any experience with combining Qt Quick and Unreal Engine 4 (or 5)? My goal would be to use a Qt Quick UI on top of 3D scenes from Unreal Engine. If you have, it would be interesting to hear how it went, and if you have any recommendations. I'm